/* ============================================
   Paperism - Apple/Google Design System
   Modern, Clean, Functional
   ============================================ */

:root {
    /* Core Colors - Dark Mode (default) */
    --bg-primary: #04060c;
    --bg-secondary: #0b1020;
    --bg-tertiary: #11182a;
    --bg-elevated: #131b2d;
    
    /* Text Colors */
    --text-primary: #f5f7ff;
    --text-secondary: rgba(245, 247, 255, 0.78);
    --text-tertiary: rgba(245, 247, 255, 0.56);
    --text-quaternary: rgba(245, 247, 255, 0.32);
    
    /* Accent Colors - Prism Spectrum (Enhanced Vibrant) */
    --prism-red: #FF1744;
    --prism-orange: #FF6F00;
    --prism-yellow: #FFD600;
    --prism-green: #00E676;
    --prism-blue: #00B0FF;
    --prism-purple: #7C4DFF;
    --accent-gradient: linear-gradient(to right, #FF1744 0%, #FF6F00 16%, #FFD600 33%, #00E676 50%, #00B0FF 66%, #7C4DFF 83%, #FF1744 100%);
    --accent-gradient-animated: linear-gradient(to right, #FF1744 20%, #FF6F00 30%, #FFD600 40%, #00E676 50%, #00B0FF 60%, #7C4DFF 70%, #FF1744 80%);
    
    /* Legacy accent colors for compatibility */
    --accent: #00B0FF;
    --accent-hover: #00d2ff;
    --accent-purple: #7C4DFF;
    --accent-pink: #FF1744;
    --accent-green: #00E676;
    --accent-orange: #FF6F00;
    
    /* Semantic Colors */
    --danger: #ff5c5c;
    --danger-hover: #ff7a7a;
    --success: #3ee7a2;
    --warning: #ffd166;
    
    /* Surfaces */
    --surface-blur: rgba(19, 27, 45, 0.78);
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-default: rgba(255, 255, 255, 0.12);
    
    /* Shadows */
    --shadow-sm: 0 6px 18px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.42);
    --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.55);
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    
    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* Typography */
    --font-sans: 'Sora', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
    --font-serif: 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

/* Light Mode */
[data-theme="light"] {
    /* Core Colors - Light Mode */
    --bg-primary: #f7f9fb;
    --bg-secondary: #eef2f9;
    --bg-tertiary: #e3e9f5;
    --bg-elevated: #ffffff;
    
    /* Text Colors */
    --text-primary: #0c172a;
    --text-secondary: rgba(12, 23, 42, 0.78);
    --text-tertiary: rgba(12, 23, 42, 0.56);
    --text-quaternary: rgba(12, 23, 42, 0.32);
    
    /* Accent Colors - Prism Spectrum (Enhanced Vibrant) */
    --prism-red: #FF1744;
    --prism-orange: #FF6F00;
    --prism-yellow: #FFD600;
    --prism-green: #00E676;
    --prism-blue: #00B0FF;
    --prism-purple: #7C4DFF;
    --accent-gradient: linear-gradient(to right, #FF1744 0%, #FF6F00 16%, #FFD600 33%, #00E676 50%, #00B0FF 66%, #7C4DFF 83%, #FF1744 100%);
    --accent-gradient-animated: linear-gradient(to right, #FF1744 20%, #FF6F00 30%, #FFD600 40%, #00E676 50%, #00B0FF 60%, #7C4DFF 70%, #FF1744 80%);
    
    /* Legacy accent colors for compatibility */
    --accent: #00B0FF;
    --accent-hover: #0ea5e9;
    --accent-purple: #7C4DFF;
    --accent-pink: #FF1744;
    --accent-green: #00E676;
    --accent-orange: #FF6F00;
    
    /* Semantic Colors */
    --danger: #ff4d4f;
    --danger-hover: #ff6b6d;
    --success: #1fba7a;
    --warning: #ffb347;
    
    /* Surfaces */
    --surface-blur: rgba(255, 255, 255, 0.82);
    --border-subtle: rgba(12, 23, 42, 0.08);
    --border-default: rgba(12, 23, 42, 0.12);
    
    /* Shadows */
    --shadow-sm: 0 4px 12px rgba(0, 27, 64, 0.08);
    --shadow-md: 0 10px 28px rgba(0, 27, 64, 0.12);
    --shadow-lg: 0 24px 48px rgba(0, 27, 64, 0.16);
}

/* System preference detection */
@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) {
        /* Core Colors - Light Mode */
        --bg-primary: #f7f9fb;
        --bg-secondary: #eef2f9;
        --bg-tertiary: #e3e9f5;
        --bg-elevated: #ffffff;
        
        /* Text Colors */
        --text-primary: #0c172a;
        --text-secondary: rgba(12, 23, 42, 0.78);
        --text-tertiary: rgba(12, 23, 42, 0.56);
        --text-quaternary: rgba(12, 23, 42, 0.32);
        
        /* Accent Colors - Prism Spectrum (Enhanced Vibrant) */
        --prism-red: #FF1744;
        --prism-orange: #FF6F00;
        --prism-yellow: #FFD600;
        --prism-green: #00E676;
        --prism-blue: #00B0FF;
        --prism-purple: #7C4DFF;
        --accent-gradient: linear-gradient(to right, #FF1744 0%, #FF6F00 16%, #FFD600 33%, #00E676 50%, #00B0FF 66%, #7C4DFF 83%, #FF1744 100%);
        --accent-gradient-animated: linear-gradient(to right, #FF1744 20%, #FF6F00 30%, #FFD600 40%, #00E676 50%, #00B0FF 60%, #7C4DFF 70%, #FF1744 80%);
        
        /* Legacy accent colors for compatibility */
        --accent: #00B0FF;
        --accent-hover: #0ea5e9;
        --accent-purple: #7C4DFF;
        --accent-pink: #FF1744;
        --accent-green: #00E676;
        --accent-orange: #FF6F00;
        
        /* Semantic Colors */
        --danger: #ff4d4f;
        --danger-hover: #ff6b6d;
        --success: #1fba7a;
        --warning: #ffb347;
        
        /* Surfaces */
        --surface-blur: rgba(255, 255, 255, 0.82);
        --border-subtle: rgba(12, 23, 42, 0.08);
        --border-default: rgba(12, 23, 42, 0.12);
        
        /* Shadows */
        --shadow-sm: 0 4px 12px rgba(0, 27, 64, 0.08);
        --shadow-md: 0 10px 28px rgba(0, 27, 64, 0.12);
        --shadow-lg: 0 24px 48px rgba(0, 27, 64, 0.16);
    }
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans), var(--font-serif);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
}

.hidden {
    display: none !important;
}

/* Background Effects */
.background-prism {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    background: 
        radial-gradient(ellipse 70% 45% at 15% 10%, rgba(107, 220, 255, 0.16), transparent),
        radial-gradient(ellipse 55% 40% at 80% 85%, rgba(160, 139, 255, 0.14), transparent),
        radial-gradient(ellipse 45% 35% at 60% 0%, rgba(255, 105, 180, 0.12), transparent),
        var(--bg-primary);
}

.background-prism::before {
    content: '';
    position: absolute;
    inset: -10%;
    background: radial-gradient(circle at 30% 20%, rgba(255, 255, 255, 0.08), transparent 35%),
                radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.06), transparent 40%);
    filter: blur(60px);
    opacity: 0.9;
}

.background-prism::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(120deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        linear-gradient(-120deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    background-size: 180px 180px;
    opacity: 0.35;
}

[data-theme="light"] .background-prism {
    background: 
        radial-gradient(ellipse 80% 50% at 20% 0%, rgba(56, 189, 248, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 80% 100%, rgba(168, 85, 247, 0.1), transparent),
        var(--bg-primary);
}

@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) .background-prism {
        background: 
            radial-gradient(ellipse 80% 50% at 20% 0%, rgba(56, 189, 248, 0.15), transparent),
            radial-gradient(ellipse 60% 40% at 80% 100%, rgba(168, 85, 247, 0.1), transparent),
            var(--bg-primary);
    }
}

.light-beam, .spectrum-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.light-beam {
    width: 600px;
    height: 600px;
    top: -200px;
    left: -100px;
    background: radial-gradient(circle, rgba(10, 132, 255, 0.4), transparent 70%);
}

[data-theme="light"] .light-beam {
    background: radial-gradient(circle, rgba(56, 189, 248, 0.3), transparent 70%);
}

@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) .light-beam {
        background: radial-gradient(circle, rgba(56, 189, 248, 0.3), transparent 70%);
    }
}

.spectrum-glow {
    width: 500px;
    height: 500px;
    bottom: -150px;
    right: -100px;
    background: radial-gradient(circle, rgba(191, 90, 242, 0.3), transparent 70%);
    animation-delay: -10s;
}

[data-theme="light"] .spectrum-glow {
    background: radial-gradient(circle, rgba(168, 85, 247, 0.25), transparent 70%);
}

@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) .spectrum-glow {
        background: radial-gradient(circle, rgba(168, 85, 247, 0.25), transparent 70%);
    }
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -20px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

/* App Container */
.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
    position: relative;
}

/* Sidebar */
.sidebar {
    width: 320px;
    height: 100vh;
    background: linear-gradient(160deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.04)) , var(--surface-blur);
    backdrop-filter: blur(36px) saturate(180%);
    -webkit-backdrop-filter: blur(36px) saturate(180%);
    border-right: 1px solid var(--border-default);
    box-shadow: inset -1px 0 0 rgba(255, 255, 255, 0.04), var(--shadow-lg);
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-base);
    position: relative;
    z-index: 10;
    flex-shrink: 0;
    overflow: hidden;
}

.sidebar.collapsed {
    transform: translateX(-100%);
    position: absolute;
    height: 100vh;
}

.sidebar-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-subtle);
    background: linear-gradient(120deg, rgba(107, 220, 255, 0.1), rgba(160, 139, 255, 0.08), rgba(255, 105, 180, 0.06));
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
}

.brand {
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    gap: 12px;
}

.prism-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    /* Remove any outline or border on hover */
    outline: none;
    border: none;
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand h2 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    background: linear-gradient(to right, #FF1744 0%, #FF6F00 16%, #FFD600 33%, #00E676 50%, #00B0FF 66%, #7C4DFF 83%, #FF1744 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
    line-height: 1.2;
}

.brand .slogan {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-top: 2px;
    display: block;
}

.header-actions {
    display: flex;
    gap: var(--space-sm);
}

/* Sidebar Toggle Button (Top Right) */
.sidebar-toggle-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 20;
    background: transparent !important;
    border: none;
    color: var(--text-secondary);
    width: 32px !important;
    height: 32px !important;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.sidebar-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: var(--text-primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Language Toggle Button */
.language-toggle {
    min-width: 40px;
    height: 36px;
    padding: 0 10px;
    background: transparent;
    border: 1px solid var(--border-default);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 12px;
    border-radius: var(--radius-md);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.language-toggle:hover {
    background: var(--bg-elevated);
    border-color: var(--text-tertiary);
    color: var(--text-primary);
}

.language-toggle .lang-text {
    white-space: nowrap;
}

/* Icon Buttons */
.icon-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    border: none;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.icon-btn:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
    transform: scale(1.05);
}

.icon-btn:active {
    transform: scale(0.95);
}

.icon-btn svg {
    width: 18px;
    height: 18px;
}

/* Search */
.search-container {
    padding: var(--space-md) var(--space-lg);
}

.search-bar {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    transition: all var(--transition-fast);
}

.search-bar:focus-within {
    border-color: var(--accent);
    background: var(--bg-secondary);
}

.search-icon {
    color: var(--text-tertiary);
    flex-shrink: 0;
}

.search-bar input {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
}

.search-bar input::placeholder {
    color: var(--text-quaternary);
}

/* Stats */
.stats-bar {
    padding: 0 var(--space-lg);
    margin-bottom: var(--space-md);
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Paper List */
.paper-list {
    flex: 1;
    overflow-y: auto;
    padding: 0 var(--space-md);
    scrollbar-width: thin;
    scrollbar-color: var(--bg-elevated) transparent;
}

.paper-list::-webkit-scrollbar {
    width: 6px;
}

.paper-list::-webkit-scrollbar-track {
    background: transparent;
}

.paper-list::-webkit-scrollbar-thumb {
    background: var(--bg-elevated);
    border-radius: var(--radius-full);
}

.paper-category {
    background: var(--bg-elevated);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.empty-state {
    text-align: center;
    padding: var(--space-2xl) var(--space-lg);
    color: var(--text-tertiary);
}

/* Sidebar Footer */
.sidebar-footer {
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--border-subtle);
    flex-shrink: 0;
}

.add-category-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: 1px dashed var(--border-default);
    border-radius: var(--radius-md);
    color: var(--text-tertiary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.add-category-btn:hover {
    border-color: var(--accent-purple);
    color: var(--accent-purple);
    background: rgba(191, 90, 242, 0.08);
}

.add-category-btn svg {
    flex-shrink: 0;
}

/* Metadata Panel */
.metadata-panel {
    border-top: 1px solid var(--border-subtle);
    padding: var(--space-lg);
    background: var(--bg-secondary);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
}

.panel-header h3 {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Form Elements */
.form-group {
    margin-bottom: var(--space-md);
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
    letter-spacing: 0.01em;
}

.glass-input,
.input-wrapper input,
.glass-input.small {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

.glass-input:focus,
.input-wrapper input:focus {
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.04);
    box-shadow: 0 0 0 3px rgba(107, 220, 255, 0.18);
}

.glass-input::placeholder {
    color: var(--text-quaternary);
}

/* Language Toggle Group */
.language-toggle-group {
    display: flex;
    gap: 8px;
    width: 100%;
}

.lang-toggle-btn {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-toggle-btn:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
}

.lang-toggle-btn.active {
    background: rgba(10, 132, 255, 0.15);
    border-color: var(--accent);
    color: var(--accent);
    font-weight: 600;
}

/* Tags Input */
.tags-input-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    padding: var(--space-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    min-height: 42px;
    align-items: center;
}

.tags-input-container:focus-within {
    border-color: var(--accent);
}

.tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.tag-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    background: rgba(10, 132, 255, 0.2);
    color: var(--accent);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
}

.remove-tag {
    cursor: pointer;
    opacity: 0.7;
    transition: opacity var(--transition-fast);
    font-size: 1rem;
    line-height: 1;
}

.remove-tag:hover {
    opacity: 1;
}

.tag-typing-input {
    flex: 1;
    min-width: 80px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 0.85rem;
    outline: none;
}

.tag-typing-input::placeholder {
    color: var(--text-quaternary);
}

/* Buttons */
.save-btn,
.primary-btn {
    padding: var(--space-sm) var(--space-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 6px 18px rgba(107, 220, 255, 0.24), 0 4px 14px rgba(0, 0, 0, 0.28);
    position: relative;
    overflow: hidden;
}

.save-btn::before,
.primary-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.save-btn:hover::before,
.primary-btn:hover:not(:disabled)::before {
    left: 100%;
}

.save-btn:hover,
.primary-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(107, 220, 255, 0.32), 0 6px 18px rgba(0, 0, 0, 0.26);
}

.save-btn:active,
.primary-btn:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(10, 132, 255, 0.3);
}

.primary-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.primary-btn.full-width {
    width: 100%;
}

/* Danger Button */
.danger-btn {
    padding: var(--space-sm) var(--space-lg);
    border: 1px solid var(--danger);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    background: transparent;
    color: var(--danger);
    transition: all var(--transition-fast);
    width: 100%;
    margin-top: var(--space-md);
}

.danger-btn:hover {
    background: var(--danger);
    color: white;
}

/* Text Button */
.text-btn {
    background: none;
    border: none;
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.text-btn:hover {
    background: rgba(10, 132, 255, 0.1);
}

.text-btn.small {
    font-size: 0.75rem;
    padding: 2px 6px;
}

.text-btn.full-width {
    width: 100%;
    text-align: center;
    margin-top: var(--space-sm);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    background: radial-gradient(120% 140% at 20% 20%, rgba(107, 220, 255, 0.08), transparent 55%),
                radial-gradient(110% 130% at 80% 10%, rgba(160, 139, 255, 0.08), transparent 60%),
                var(--bg-primary);
    height: 100vh;
    overflow: hidden;
}

.floating-toggle {
    position: fixed;
    top: var(--space-lg);
    left: var(--space-lg);
    z-index: 20;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    border: none;
    background: var(--surface-blur);
    backdrop-filter: blur(20px);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
}

.floating-toggle:hover {
    transform: scale(1.05);
    background: var(--bg-tertiary);
}

/* Welcome Screen */
.welcome-screen {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2xl);
    overflow-y: auto;
}

.welcome-content {
    text-align: center;
    max-width: 520px;
    padding: 0;
}

.prism-logo {
    margin-bottom: var(--space-lg);
    display: inline-flex;
    padding: var(--space-sm);
    border-radius: var(--radius-full);
    position: relative;
    cursor: pointer;
    transition: filter 0.3s ease;
    perspective: 1000px;
}

.prism-logo::before {
    content: '';
    position: absolute;
    inset: -20px;
    border-radius: var(--radius-full);
    background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), 
        rgba(56, 189, 248, 0.15) 0%, 
        rgba(168, 85, 247, 0.1) 40%, 
        transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
    filter: blur(20px);
}

.prism-logo::after {
    content: '';
    position: absolute;
    inset: -15px;
    border-radius: var(--radius-full);
    background: conic-gradient(from var(--rotation, 0deg) at 50% 50%,
        rgba(56, 189, 248, 0.2),
        rgba(168, 85, 247, 0.2),
        rgba(244, 114, 182, 0.2),
        rgba(56, 189, 248, 0.2));
    opacity: 0;
    transition: opacity 0.5s ease, transform 0.5s ease;
    pointer-events: none;
    filter: blur(15px);
}

.prism-logo svg {
    filter: drop-shadow(0 0 20px rgba(107, 220, 255, 0.3));
    transition: filter 0.3s ease;
    transform-origin: center center;
    transform-style: preserve-3d;
    will-change: transform;
}

.prism-logo svg path {
    transition: stroke-opacity 0.3s ease, stroke-width 0.3s ease;
}

.prism-logo svg path:nth-child(1) {
    stroke-opacity: 0.3;
}

.prism-logo svg path:nth-child(2) {
    stroke-opacity: 0.6;
}

.prism-logo svg path:nth-child(3) {
    stroke-opacity: 1;
}

.prism-logo.active::before {
    opacity: 1;
}

.prism-logo.active::after {
    opacity: 1;
    animation: prism-rotate 8s linear infinite;
}

.prism-logo.active svg {
    filter: drop-shadow(0 0 30px rgba(160, 139, 255, 0.6)) 
           drop-shadow(0 0 15px rgba(107, 220, 255, 0.4));
}

.prism-logo.active svg path:nth-child(1) {
    stroke-opacity: 0.5;
    stroke-width: 2;
}

.prism-logo.active svg path:nth-child(2) {
    stroke-opacity: 0.75;
    stroke-width: 2;
}

.prism-logo.active svg path:nth-child(3) {
    stroke-opacity: 1;
    stroke-width: 2.5;
    animation: prism-pulse 2s ease-in-out infinite;
}

@keyframes prism-rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes prism-pulse {
    0%, 100% { stroke-width: 2.5; }
    50% { stroke-width: 3; }
}

@keyframes prism-spin {
    0% {
        transform: perspective(1000px) rotateY(0deg) rotateZ(0deg) scale(1);
    }
    50% {
        transform: perspective(1000px) rotateY(180deg) rotateZ(180deg) scale(1.15);
    }
    100% {
        transform: perspective(1000px) rotateY(360deg) rotateZ(360deg) scale(1);
    }
}

.welcome-content h1 {
    font-size: 2.8rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-sm);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.slogan-large {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin: 0 0 var(--space-lg);
    letter-spacing: 0.02em;
}

/* Content Frame */
.content-frame {
    flex: 1;
    border: none;
    background: var(--bg-secondary);
    margin: var(--space-md);
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.45);
    border: 1px solid var(--border-default);
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-lg);
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    animation: fadeIn var(--transition-fast);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.glass-panel {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-lg);
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: slideUp var(--transition-base);
    width: min(560px, 95vw);
}

/* Converted Content Viewer Modal */
.converted-viewer-container {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-lg);
    width: min(1200px, 90vw);
    height: min(800px, 85vh);
    display: flex;
    flex-direction: column;
    animation: slideUp var(--transition-base);
}

.converted-viewer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-subtle);
    gap: var(--space-md);
    flex-shrink: 0;
}

.viewer-title-area {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    flex: 1;
}

.viewer-title-area h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.viewer-tabs {
    display: flex;
    gap: var(--space-xs);
}

.viewer-tab {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.viewer-tab:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-default);
}

.viewer-tab.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.viewer-tab.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.viewer-tab svg {
    width: 16px;
    height: 16px;
}

.viewer-actions {
    display: flex;
    gap: var(--space-xs);
}

.converted-viewer-body {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.viewer-content-wrapper {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-xl);
    background: var(--bg-primary);
}

.viewer-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-tertiary);
    font-size: 1rem;
}

/* Viewer content styling */
.viewer-content-wrapper pre {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    overflow-x: auto;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-primary);
}

.viewer-content-wrapper .markdown-content {
    max-width: 900px;
    margin: 0 auto;
}

.viewer-content-wrapper .markdown-content h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-default);
    padding-bottom: var(--space-sm);
}

.viewer-content-wrapper .markdown-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: var(--space-lg);
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.viewer-content-wrapper .markdown-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: var(--space-md);
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.viewer-content-wrapper .markdown-content p {
    margin-bottom: var(--space-md);
    line-height: 1.8;
    color: var(--text-secondary);
}

.viewer-content-wrapper .markdown-content ul,
.viewer-content-wrapper .markdown-content ol {
    margin-bottom: var(--space-md);
    padding-left: var(--space-xl);
    color: var(--text-secondary);
}

.viewer-content-wrapper .markdown-content li {
    margin-bottom: var(--space-xs);
    line-height: 1.7;
}

.viewer-content-wrapper .markdown-content code {
    padding: 2px 6px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.9em;
    color: var(--accent-pink);
}

.viewer-content-wrapper .markdown-content pre code {
    padding: 0;
    background: transparent;
    color: inherit;
}

.viewer-content-wrapper .markdown-content blockquote {
    margin: var(--space-md) 0;
    padding-left: var(--space-md);
    border-left: 3px solid var(--accent);
    color: var(--text-tertiary);
    font-style: italic;
}

.viewer-content-wrapper .markdown-content table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-md) 0;
}

.viewer-content-wrapper .markdown-content th,
.viewer-content-wrapper .markdown-content td {
    padding: var(--space-sm);
    border: 1px solid var(--border-default);
    text-align: left;
}

.viewer-content-wrapper .markdown-content th {
    background: var(--bg-tertiary);
    font-weight: 600;
    color: var(--text-primary);
}

.viewer-content-wrapper .markdown-content td {
    color: var(--text-secondary);
}

.viewer-content-wrapper .markdown-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: var(--space-md) 0;
}

.viewer-content-wrapper .markdown-content hr {
    border: none;
    border-top: 1px solid var(--border-default);
    margin: var(--space-xl) 0;
}


.glass-panel.wide {
    width: min(1200px, 95vw);
    max-width: 1200px;
    max-height: 90vh;
    overflow-y: auto;
}

@keyframes slideUp {
    from { 
        opacity: 0;
        transform: translateY(20px) scale(0.98);
    }
    to { 
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-subtle);
}

.modal-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.modal-body {
    padding: var(--space-lg);
    overflow-y: auto;
    flex: 1;
}

.modal-body .form-group textarea,
.modal-body .form-group input,
.modal-body select {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    transition: all var(--transition-fast);
}

.modal-body .form-group textarea:focus,
.modal-body .form-group input:focus,
.modal-body select:focus {
    border-color: var(--accent);
}

.modal-body textarea {
    resize: vertical;
    min-height: 120px;
}

/* Tabs */
.form-tabs {
    display: flex;
    gap: var(--space-xs);
    padding: var(--space-xs);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.tab-btn {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-btn:hover:not(.active) {
    color: var(--text-primary);
}

.tab-btn.active {
    background: var(--accent);
    color: white;
}

.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

/* AI Layout */
.ai-layout {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    height: 100%;
}

.ai-controls {
    width: 100%;
    flex-shrink: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-md);
    align-items: start;
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
}

.ai-preview {
    flex: 1;
    min-height: 600px;
    display: flex;
    flex-direction: column;
}

.ai-meta {
    width: 100%;
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-md);
    align-items: start;
}

.prompt-group .prompt-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.preview-header {
    margin-bottom: var(--space-md);
    padding: var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.preview-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}

.preview-header .icon-btn {
    flex-shrink: 0;
}

.preview-header::before {
    content: '';
    width: 4px;
    height: 20px;
    background: linear-gradient(135deg, #38bdf8, #a855f7);
    border-radius: 2px;
    flex-shrink: 0;
}

.preview-frame-wrapper {
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: white;
    box-shadow: var(--shadow-lg);
    flex: 1;
    display: flex;
}

.preview-frame {
    width: 100%;
    height: 100%;
    min-height: 600px;
    border: none;
    background: white;
}

/* Status & Footer */
.status-text {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-top: var(--space-sm);
    min-height: 1.2em;
}

.file-input {
    padding: var(--space-sm);
    cursor: pointer;
}

.file-input::file-selector-button {
    padding: var(--space-xs) var(--space-md);
    margin-right: var(--space-sm);
    border: none;
    border-radius: var(--radius-sm);
    background: var(--accent);
    color: white;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
}

.panel-footer {
    margin-top: var(--space-lg);
}

/* Confirm Dialog */
.confirm-dialog {
    width: min(400px, 90vw) !important;
}

.confirm-dialog .modal-body {
    text-align: center;
    padding: var(--space-xl) var(--space-lg);
}

.confirm-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--space-lg);
    border-radius: var(--radius-full);
    background: rgba(255, 69, 58, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
}

.confirm-icon svg {
    width: 28px;
    height: 28px;
    color: var(--danger);
}

.confirm-dialog h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.confirm-dialog p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.confirm-actions {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-lg);
    justify-content: center;
}

.confirm-actions .cancel-btn {
    padding: var(--space-sm) var(--space-xl);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.confirm-actions .cancel-btn:hover {
    background: var(--bg-tertiary);
}

.confirm-actions .confirm-btn {
    padding: var(--space-sm) var(--space-xl);
    border: none;
    border-radius: var(--radius-sm);
    background: var(--danger);
    color: white;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.confirm-actions .confirm-btn.create-btn {
    background: var(--accent-purple);
}

.confirm-actions .confirm-btn.create-btn:hover {
    background: #9333ea;
}

.category-icon {
    background: rgba(191, 90, 242, 0.15) !important;
}

.category-icon svg {
    color: var(--accent-purple) !important;
}

.confirm-actions .confirm-btn:hover {
    background: var(--danger-hover);
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        height: 100vh;
        z-index: 50;
    }
    
    .sidebar.collapsed {
        transform: translateX(-100%);
    }
    
    .ai-layout {
        flex-direction: column;
    }
    
    .ai-controls {
        width: 100%;
        grid-template-columns: 1fr;
    }
    
    .glass-panel.wide {
        width: min(900px, 95vw);
        max-height: 90vh;
    }
}

@media (max-width: 640px) {
    .sidebar {
        width: 100%;
    }
    
    .content-frame {
        margin: var(--space-sm);
        border-radius: var(--radius-md);
    }
    
    .welcome-content h1 {
        font-size: 2rem;
    }
}

/* ============================================
   Action Zones Container (Home Page)
   ============================================ */
.action-zones-container {
    margin-top: var(--space-xl);
    display: flex;
    gap: var(--space-md);
    width: 100%;
    max-width: 520px;
    justify-content: center;
}

.action-zone {
    flex: 1;
    position: relative;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    padding: var(--space-xl) var(--space-md);
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 14px 36px rgba(0, 0, 0, 0.25);
    cursor: pointer;
    transition: all var(--transition-base);
}

.action-zone:hover,
.action-zone.dragover {
    border-color: var(--accent);
    background: linear-gradient(145deg, rgba(107, 220, 255, 0.14), rgba(160, 139, 255, 0.12));
    box-shadow: 0 18px 44px rgba(0, 0, 0, 0.32);
}

.action-zone.dragover {
    transform: scale(1.02);
}

.pdf-drop-zone .drop-file-input {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.drop-zone-content {
    text-align: center;
    pointer-events: none;
}

.drop-zone-content svg {
    color: var(--text-tertiary);
    margin-bottom: var(--space-sm);
    transition: color var(--transition-fast);
}

.action-zone:hover .drop-zone-content svg,
.action-zone.dragover .drop-zone-content svg {
    color: var(--accent);
}

.drop-zone-text {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-xs);
}

.drop-zone-hint {
    font-size: 0.75rem;
    color: var(--text-quaternary);
}

/* Paste HTML Zone specific */
.paste-html-zone {
    border-style: dashed;
}

.paste-html-zone:hover {
    border-color: var(--accent-purple);
    background: rgba(191, 90, 242, 0.08);
}

.paste-html-zone:hover .drop-zone-content svg {
    color: var(--accent-purple);
}

/* ============================================
   Paper Item with More Button
   ============================================ */
.paper-item {
    padding: var(--space-md);
    margin-bottom: var(--space-sm);
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
    display: block; /* Changed from flex to block for better nested content handling */
    position: relative;
}

.paper-item-wrapper {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    min-height: 56px; /* Fixed minimum height to prevent jumping */
}

.paper-item.dragging {
    opacity: 0.5;
    background: rgba(255, 255, 255, 0.04);
}

.paper-item.drag-over {
    border-color: var(--accent);
    background: rgba(107, 220, 255, 0.1);
}

.paper-item:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: var(--border-default);
}

.paper-item.active {
    background: rgba(107, 220, 255, 0.12);
    border-color: rgba(107, 220, 255, 0.35);
}

.paper-item-content {
    flex: 1;
    min-width: 0;
}

.paper-item-title {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    line-height: 1.4;
}

.paper-item-meta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.75rem;
    color: var(--text-tertiary);
    flex-wrap: wrap;
}

/* Paper Action Buttons (inside paper-item) */
.paper-item .paper-actions {
    position: absolute;
    right: var(--space-md);
    top: var(--space-md);
    transform: none;
    flex-direction: column;
    gap: 2px;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.paper-item:hover .paper-actions {
    opacity: 1;
}

.paper-more-btn {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    border: none;
    background: transparent;
    color: var(--text-quaternary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all var(--transition-fast);
}

.paper-item:hover .paper-more-btn,
.paper-item:hover .paper-download-btn {
    opacity: 1;
}

.paper-download-btn {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    border: none;
    background: transparent;
    color: var(--text-quaternary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all var(--transition-fast);
}

.paper-download-btn:hover {
    background: var(--bg-elevated);
    color: var(--accent);
}

.paper-more-btn:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
}

.paper-more-btn.active {
    opacity: 1;
    background: var(--accent);
    color: white;
}

/* Paper Action Buttons Container */
.paper-actions {
    display: flex;
    flex-direction: column;
    gap: 4px;
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.paper-item:hover .paper-actions {
    opacity: 1;
}

.paper-action-btn {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    border: none;
    background: transparent;
    color: var(--text-quaternary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.paper-action-btn:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
}

.paper-action-btn.active {
    background: var(--accent);
    color: white;
}

/* Theme Toggle Button */
.theme-toggle {
    position: relative;
}

.theme-toggle .sun-icon,
.theme-toggle .moon-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.theme-toggle .sun-icon {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(-90deg) scale(0.5);
}

.theme-toggle .moon-icon {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg) scale(1);
}

[data-theme="light"] .theme-toggle .sun-icon,
:root:not([data-theme="dark"]) .theme-toggle .sun-icon {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg) scale(1);
}

[data-theme="light"] .theme-toggle .moon-icon,
:root:not([data-theme="dark"]) .theme-toggle .moon-icon {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(90deg) scale(0.5);
}

@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) .theme-toggle .sun-icon {
        opacity: 1;
        transform: translate(-50%, -50%) rotate(0deg) scale(1);
    }
    :root:not([data-theme="dark"]) .theme-toggle .moon-icon {
        opacity: 0;
        transform: translate(-50%, -50%) rotate(90deg) scale(0.5);
    }
}

/* ============================================
   Properties Popover
   ============================================ */
.properties-popover {
    position: fixed;
    z-index: 200;
    width: 280px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    animation: popoverIn var(--transition-fast);
}

@keyframes popoverIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-8px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.popover-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-subtle);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.popover-close {
    width: 24px;
    height: 24px;
    border: none;
    background: transparent;
    color: var(--text-tertiary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.popover-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.popover-body {
    padding: var(--space-md);
}

.popover-body .form-group {
    margin-bottom: var(--space-md);
}

.popover-body .form-group:last-of-type {
    margin-bottom: var(--space-md);
}

.popover-body label {
    display: block;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-tertiary);
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.popover-body .glass-input.small {
    padding: var(--space-sm);
    font-size: 0.85rem;
}

.popover-actions {
    display: flex;
    gap: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--border-subtle);
}

.popover-actions .primary-btn {
    flex: 1;
    padding: var(--space-sm);
    font-size: 0.8rem;
}

.danger-btn-small {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--danger);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    background: transparent;
    color: var(--danger);
    transition: all var(--transition-fast);
}

.danger-btn-small:hover {
    background: var(--danger);
    color: white;
}

.danger-btn-small svg {
    flex-shrink: 0;
}

/* ============================================
   Tag Folders (Collapsible Groups)
   ============================================ */
.tag-folder {
    margin-bottom: var(--space-sm);
}

.tag-folder-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
}

.tag-folder-header:hover {
    background: var(--bg-tertiary);
}

.tag-folder-header.drag-over {
    background: rgba(10, 132, 255, 0.15);
    border: 1px dashed var(--accent);
}

.folder-chevron {
    width: 16px;
    height: 16px;
    color: var(--text-tertiary);
    transition: transform var(--transition-fast);
    flex-shrink: 0;
}

.tag-folder.collapsed .folder-chevron {
    transform: rotate(-90deg);
}

.folder-icon {
    width: 18px;
    height: 18px;
    color: var(--accent-purple);
    flex-shrink: 0;
}

.folder-name {
    flex: 1;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.folder-count {
    font-size: 0.7rem;
    color: var(--text-quaternary);
    background: var(--bg-tertiary);
    padding: 2px 8px;
    border-radius: var(--radius-full);
}

.tag-folder-content {
    padding-left: var(--space-lg);
    padding-bottom: var(--space-sm);
    overflow: hidden;
    transition: max-height var(--transition-base), padding var(--transition-base);
}

.tag-folder.collapsed .tag-folder-content {
    max-height: 0 !important;
    padding-top: 0;
    padding-bottom: 0;
}

.tag-folder-content .paper-item {
    margin-left: var(--space-sm);
    border-left: 2px solid var(--border-subtle);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.tag-folder-content .paper-item:last-child {
    margin-bottom: 0;
}

.tag-folder-content .paper-item:hover {
    border-left-color: var(--accent);
}

/* Folder More Button */
.folder-more-btn {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    border: none;
    background: transparent;
    color: var(--text-quaternary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all var(--transition-fast);
    margin-left: auto;
}

.tag-folder-header:hover .folder-more-btn {
    opacity: 1;
}

.folder-more-btn:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
}

/* Folder Drag States */
.tag-folder.dragging {
    opacity: 0.5;
}

.tag-folder.folder-drag-over {
    border: 2px dashed var(--accent-purple);
    border-radius: var(--radius-md);
    background: rgba(191, 90, 242, 0.1);
}

/* Folder Popover */
.folder-popover {
    position: fixed;
    z-index: 250;
    width: 280px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    animation: popoverIn var(--transition-fast);
}

.folder-popover .popover-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-subtle);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.folder-popover .popover-body {
    padding: var(--space-md);
}

.folder-popover .form-group {
    margin-bottom: var(--space-md);
}

.folder-popover label {
    display: block;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-tertiary);
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

/* Icon Picker */
.icon-picker {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.icon-option {
    width: 32px;
    height: 32px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-tertiary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.icon-option:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.icon-option.selected {
    border-color: var(--accent);
    background: rgba(10, 132, 255, 0.15);
    color: var(--accent);
}

/* Color Picker */
.color-picker {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.color-option {
    width: 28px;
    height: 28px;
    border: 2px solid transparent;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.color-option:first-child {
    background: var(--bg-tertiary);
    border-color: var(--border-subtle);
}

.color-option:first-child svg {
    color: var(--text-quaternary);
}

.color-option:hover {
    transform: scale(1.1);
}

.color-option.selected {
    border-color: var(--text-primary);
    box-shadow: 0 0 0 2px var(--bg-primary), 0 0 0 4px currentColor;
}

.folder-popover .popover-actions {
    display: flex;
    gap: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--border-subtle);
}

.folder-popover .primary-btn {
    flex: 1;
    padding: var(--space-sm);
    font-size: 0.8rem;
}

/* Uncategorized Section */
.uncategorized-section {
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-subtle);
}

.uncategorized-header {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-quaternary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-sm) var(--space-md);
}

/* Tag Select in Properties */
.tag-select-container {
    position: relative;
}

.tag-select-trigger {
    width: 100%;
    padding: var(--space-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.85rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all var(--transition-fast);
}

.tag-select-trigger:hover {
    border-color: var(--accent);
}

.tag-select-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-top: var(--space-xs);
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    z-index: 300;
    max-height: 200px;
    overflow-y: auto;
}

.tag-select-option {
    padding: var(--space-sm) var(--space-md);
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.tag-select-option:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.tag-select-option.selected {
    background: rgba(10, 132, 255, 0.15);
    color: var(--accent);
}

.tag-select-new {
    padding: var(--space-sm) var(--space-md);
    border-top: 1px solid var(--border-subtle);
}

.tag-select-new input {
    width: 100%;
    padding: var(--space-xs) var(--space-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.8rem;
    outline: none;
}

.tag-select-new input:focus {
    border-color: var(--accent);
}

.tag-select-new input::placeholder {
    color: var(--text-quaternary);
}

/* ============================================
   Paper Item Badges (Markdown/Beamer indicators) - UPDATED
   ============================================ */

/* Conversion icons in title */
.conversion-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: 3px;
    margin-left: 6px;
    vertical-align: middle;
}

.conversion-icon.md-icon {
    color: #a78bfa;
    background: rgba(102, 126, 234, 0.15);
}

.conversion-icon.tex-icon {
    color: #34d399;
    background: rgba(17, 153, 142, 0.15);
}

.conversion-icon svg {
    width: 10px;
    height: 10px;
}

/* View converted link in meta */
.view-converted-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: none;
    border: none;
    color: var(--accent-purple);
    font-size: 0.75rem;
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.view-converted-link:hover {
    background: rgba(191, 90, 242, 0.1);
    color: var(--accent-purple);
}

.view-converted-link svg {
    width: 12px;
    height: 12px;
}

.paper-item-header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    justify-content: space-between;
}

.paper-item-title {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px;
}

/* Hide old badge and preview styles */
.paper-badges,
.paper-badge,
.paper-view-converted-btn,
.paper-converted-preview,
.converted-tabs,
.converted-tab,
.converted-content-area,
.converted-loading,
.converted-error,
.converted-code,
.converted-actions,
.converted-action-btn {
    display: none !important;
}

/* ============================================
   Right Sidebar (Converted Content Viewer)
   ============================================ */
.right-sidebar {
    width: 480px;
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    animation: slideInRight 0.25s ease;
    position: relative;
    overflow: hidden;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.right-sidebar.hidden {
    display: none;
}

.right-sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-subtle);
    gap: var(--space-md);
    flex-shrink: 0;
}

.right-sidebar-tabs {
    display: flex;
    gap: var(--space-xs);
}

.right-tab-btn {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.right-tab-btn:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
}

.right-tab-btn.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.right-tab-btn svg {
    width: 14px;
    height: 14px;
}

/* Right Panel Structure */
.right-panel {
    display: none;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.right-panel.active {
    display: flex;
}

/* Panel Toolbar */
.panel-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--border-subtle);
    background: var(--bg-tertiary);
    flex-shrink: 0;
}

.toolbar-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

/* View Toggle Buttons */
.view-toggle {
    display: flex;
    gap: 2px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    padding: 2px;
}

.toggle-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-tertiary);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.toggle-btn:hover {
    color: var(--text-secondary);
}

.toggle-btn.active {
    background: var(--accent);
    color: white;
}

.toggle-btn svg {
    width: 12px;
    height: 12px;
}

/* Panel Content Wrapper */
.panel-content-wrapper {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--space-md);
    scrollbar-width: thin;
    scrollbar-color: var(--bg-elevated) transparent;
}

.panel-content-wrapper::-webkit-scrollbar {
    width: 6px;
}

.panel-content-wrapper::-webkit-scrollbar-track {
    background: transparent;
}

.panel-content-wrapper::-webkit-scrollbar-thumb {
    background: var(--bg-elevated);
    border-radius: var(--radius-full);
}

/* Markdown Rendered Content */
.markdown-rendered {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--text-primary);
}

.markdown-rendered h1,
.markdown-rendered h2,
.markdown-rendered h3,
.markdown-rendered h4,
.markdown-rendered h5,
.markdown-rendered h6 {
    margin-top: 1.5em;
    margin-bottom: 0.5em;
    font-weight: 600;
    line-height: 1.3;
}

.markdown-rendered h1:first-child,
.markdown-rendered h2:first-child,
.markdown-rendered h3:first-child {
    margin-top: 0;
}

.markdown-rendered h1 { font-size: 1.5rem; }
.markdown-rendered h2 { font-size: 1.3rem; }
.markdown-rendered h3 { font-size: 1.1rem; }
.markdown-rendered h4 { font-size: 1rem; }

.markdown-rendered p {
    margin-bottom: 1em;
}

.markdown-rendered ul,
.markdown-rendered ol {
    margin-bottom: 1em;
    padding-left: 1.5em;
}

.markdown-rendered li {
    margin-bottom: 0.3em;
}

.markdown-rendered code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'SF Mono', Monaco, Consolas, monospace;
    font-size: 0.85em;
}

.markdown-rendered pre {
    background: var(--bg-tertiary);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin-bottom: 1em;
}

.markdown-rendered pre code {
    background: transparent;
    padding: 0;
}

.markdown-rendered blockquote {
    border-left: 3px solid var(--accent);
    margin: 1em 0;
    padding-left: 1em;
    color: var(--text-secondary);
}

.markdown-rendered table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1em;
}

.markdown-rendered th,
.markdown-rendered td {
    border: 1px solid var(--border-subtle);
    padding: var(--space-sm);
    text-align: left;
}

.markdown-rendered th {
    background: var(--bg-tertiary);
    font-weight: 600;
}

.markdown-rendered img {
    max-width: 100%;
    border-radius: var(--radius-md);
}

.markdown-rendered a {
    color: var(--accent);
    text-decoration: none;
}

.markdown-rendered a:hover {
    text-decoration: underline;
}

/* Raw Code Container */
.raw-code-container {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.raw-code-editor {
    flex: 1;
    width: 100%;
    min-height: 300px;
    font-family: 'SF Mono', Monaco, Consolas, 'Courier New', monospace;
    font-size: 0.8rem;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    resize: none;
    outline: none;
    transition: border-color var(--transition-fast);
}

.raw-code-editor:focus {
    border-color: var(--accent);
}

/* Beamer Code Display */
.beamer-code {
    font-family: 'SF Mono', Monaco, Consolas, 'Courier New', monospace;
    font-size: 0.8rem;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-tertiary);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    overflow: auto;
    white-space: pre-wrap;
    word-break: break-word;
    margin: 0;
}

/* Loading and Status Text */
.loading-text,
.error-text,
.no-content-text {
    color: var(--text-tertiary);
    font-style: italic;
    text-align: center;
    padding: var(--space-xl);
}

.error-text {
    color: var(--danger);
}

/* No Converted Content */
.no-converted-content {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    color: var(--text-tertiary);
    text-align: center;
    padding: var(--space-xl);
}

.no-converted-content:not(.hidden) {
    display: flex;
}

.no-converted-content p {
    margin: 0;
}

.no-converted-content .hint {
    font-size: 0.85rem;
    margin-top: var(--space-sm);
    opacity: 0.7;
}

/* Right Sidebar Actions */
.right-sidebar-actions {
    display: flex;
    gap: var(--space-sm);
    padding: var(--space-md);
    border-top: 1px solid var(--border-subtle);
    background: var(--bg-secondary);
    flex-shrink: 0;
}

.action-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.action-btn:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border-color: var(--accent);
}

.action-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.action-btn svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.action-btn.save-btn {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

.action-btn.save-btn:hover {
    background: var(--accent-hover);
}

.action-btn .spinning {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Regenerate Confirm Modal */
.warning-icon svg {
    color: var(--warning);
}

.warning-btn {
    background: var(--warning) !important;
    color: #000 !important;
}

.warning-btn:hover {
    background: #e6c200 !important;
}

.secondary-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.secondary-btn:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border-color: var(--accent);
}

.secondary-btn svg {
    width: 14px;
    height: 14px;
}

/* ============================================
   Notifications
   ============================================ */
.notification {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    color: var(--text-primary);
    font-size: 0.9rem;
    z-index: 1000;
    opacity: 0;
    transition: all 0.3s ease;
}

.notification.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.notification-success {
    border-color: var(--success);
    background: rgba(48, 209, 88, 0.1);
}

.notification-error {
    border-color: var(--danger);
    background: rgba(255, 69, 58, 0.1);
}

/* ============================================
   Content Frame Adjustments (with right sidebar)
   ============================================ */
.main-content {
    display: flex;
    overflow: hidden;
}

.content-frame {
    flex: 1;
    min-width: 0;
}

/* Icon button small variant */
.icon-btn.small {
    width: 28px;
    height: 28px;
}

.icon-btn.small svg {
    width: 14px;
    height: 14px;
}

/* ============================================
   Prism Flow Design System Enhancements
   ============================================ */

/* Prism Rainbow Text Effect - Animated Gradient */
.prism-text {
    background: var(--accent-gradient-animated);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: prism-shine 4s linear infinite;
}

@keyframes prism-shine {
    0% { background-position: 0% center; }
    100% { background-position: 200% center; }
}

/* Grid Background for Welcome Screen */
.grid-bg {
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
}

[data-theme="light"] .grid-bg {
    background-image: 
        linear-gradient(rgba(0, 0, 0, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 0, 0, 0.03) 1px, transparent 1px);
    background-size: 40px 40px;
}

/* Float Animation for Logo */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.animate-float {
    animation: float 6s ease-in-out infinite;
}

/* Legacy flow band animations - no longer used with gradient fill design */
/* Kept for backward compatibility if needed */

/* ============================================
   Prism Logo Enhanced Effects - Gradient Fill Design
   ============================================ */
.logo-svg path {
    transition: all 0.4s ease;
    outline: none;
}

.prism-animation-wrapper:hover .logo-svg path,
.prism-logo:hover svg path {
    fill-opacity: 1 !important;
    filter: drop-shadow(0 0 20px rgba(255, 23, 68, 0.6)) 
            drop-shadow(0 0 30px rgba(124, 77, 255, 0.5)) 
            drop-shadow(0 0 40px rgba(0, 230, 118, 0.4));
}

/* Subtle pulse animation for the gradient triangle */
@keyframes prism-pulse {
    0%, 100% { 
        filter: drop-shadow(0 0 8px rgba(255, 23, 68, 0.3)) 
                drop-shadow(0 0 12px rgba(124, 77, 255, 0.2));
    }
    50% { 
        filter: drop-shadow(0 0 16px rgba(255, 23, 68, 0.5)) 
                drop-shadow(0 0 24px rgba(124, 77, 255, 0.4)) 
                drop-shadow(0 0 32px rgba(0, 230, 118, 0.3));
    }
}

.animate-float .logo-svg {
    animation: float 6s ease-in-out infinite, prism-pulse 4s ease-in-out infinite;
}

/* Glow Effect for Hero Section */
.hero-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 163, 255, 0.15), transparent 70%);
    filter: blur(100px);
    pointer-events: none;
    animation: pulse-glow 8s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { opacity: 0.3; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 0.5; transform: translate(-50%, -50%) scale(1.1); }
}

[data-theme="light"] .hero-glow {
    background: radial-gradient(circle, rgba(0, 163, 255, 0.08), transparent 70%);
}

/* Gradient Button with Prism Colors */
.btn-prism-gradient {
    position: relative;
    background: var(--accent-gradient);
    color: white;
    font-weight: 600;
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius-lg);
    cursor: pointer;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-prism-gradient::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, rgba(255,255,255,0.2), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.btn-prism-gradient:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 163, 255, 0.3);
}

.btn-prism-gradient:hover::before {
    opacity: 1;
}

/* Enhanced Welcome Screen */
.welcome-screen {
    position: relative;
    overflow: hidden;
}

.welcome-screen::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse 70% 50% at 30% 20%, rgba(255, 0, 85, 0.08), transparent),
        radial-gradient(ellipse 60% 45% at 70% 80%, rgba(143, 0, 255, 0.08), transparent);
    pointer-events: none;
}

/* Prism Logo Hover Effect - No box outline */
.prism-logo svg {
    transition: all 0.3s ease;
    display: block;
    outline: none;
}

/* Let the glow/shadow extend beyond the viewBox so no hard box edge appears */
.prism-logo svg,
.logo-svg {
    overflow: visible;
    background: transparent;
}

.prism-logo:hover svg {
    filter: drop-shadow(0 0 12px rgba(255, 23, 68, 0.5)) 
            drop-shadow(0 0 18px rgba(124, 77, 255, 0.4));
    transform: scale(1.05);
}

/* Remove any default focus outline */
.prism-logo,
.prism-logo *,
.prism-animation-wrapper,
.prism-animation-wrapper * {
    outline: none !important;
    box-shadow: none !important;
}

/* Glass Morphism Enhancement */
.glass-enhanced {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

[data-theme="light"] .glass-enhanced {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}