/* ============================================
   Frontend Effect Playground - Main Styles
   Material You Purple/Lavender Theme
   ============================================ */

/* CSS Custom Properties (Material You Theme) */
:root {
    --bg: #F0EBF8;
    --surface: #FFFFFF;
    --primary: #6750A4;
    --primary-container: #EADDFF;
    --sidebar-bg: #EDE7F6;
    --text-1: #1C1B1F;
    --text-2: #49454F;
    --border: #CAC4D0;
    --code-bg: #1E1A2E;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
}

/* 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;
    height: 100%;
}

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg);
    color: var(--text-1);
    line-height: 1.6;
    height: 100%;
    overflow: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--sidebar-bg);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: var(--radius-full);
    border: 2px solid var(--sidebar-bg);
}

::-webkit-scrollbar-thumb:hover {
    background: #553f91;
}

/* Selection */
::selection {
    background-color: var(--primary-container);
    color: var(--primary);
}

/* App Container */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* ============================================
   HEADER BAR (60px)
   ============================================ */
.header-bar {
    height: 60px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-xl);
    flex-shrink: 0;
    z-index: 100;
}

.search-container {
    flex: 1;
    max-width: 500px;
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    padding: var(--spacing-sm) var(--spacing-lg);
    transition: all var(--transition-normal);
}

.search-box:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(103, 80, 164, 0.15);
}

.search-icon {
    width: 20px;
    height: 20px;
    color: var(--text-2);
    margin-right: var(--spacing-sm);
}

.search-input {
    flex: 1;
    border: none;
    background: transparent;
    outline: none;
    font-size: 15px;
    color: var(--text-1);
}

.search-input::placeholder {
    color: var(--text-2);
}

.brand-container {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
}

.brand-text {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-2);
    letter-spacing: 0.3px;
}

.brand-subtext {
    font-size: 9px;
    font-weight: 400;
    font-style: italic;
    color: var(--text-2);
    opacity: 0.7;
}

/* ============================================
   TITLE BAR WITH ANIMATED MESH (80px)
   ============================================ */
.title-bar {
    height: 80px;
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
}

.mesh-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.title-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    pointer-events: none;
}

.title-overlay h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
    text-shadow: 0 2px 10px rgba(255, 255, 255, 0.8);
}

.title-overlay p {
    font-size: 13px;
    color: var(--text-2);
    font-weight: 500;
}

/* ============================================
   MAIN CONTENT AREA
   ============================================ */
.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* ============================================
   LEFT SIDEBAR (280px)
   ============================================ */
.sidebar {
    width: 280px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border);
}

.sidebar-header h2 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-2);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sidebar-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
}

.category-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: var(--spacing-xs);
    border-left: 3px solid transparent;
}

.category-item:hover {
    background: rgba(103, 80, 164, 0.08);
}

.category-item.active {
    background: var(--primary-container);
    border-left-color: var(--primary);
}

.category-icon {
    font-size: 20px;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface);
    border-radius: var(--radius-md);
}

.category-info {
    flex: 1;
}

.category-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-1);
    display: block;
}

.category-name-zh {
    font-size: 12px;
    color: var(--text-2);
    display: block;
    margin-top: 2px;
}

.category-count {
    font-size: 11px;
    background: var(--surface);
    color: var(--primary);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-weight: 600;
}

/* ============================================
   RIGHT CONTENT AREA
   ============================================ */
.content-area {
    flex: 1;
    background: var(--bg);
    overflow-y: auto;
    padding: var(--spacing-xl);
}

.content-header {
    margin-bottom: var(--spacing-xl);
}

.content-header h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: var(--spacing-xs);
}

.content-header p {
    font-size: 14px;
    color: var(--text-2);
}

/* Effects Grid */
.effects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    max-width: 1200px;
}

/* Effect Card */
.effect-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.effect-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.effect-preview {
    height: 180px;
    background: var(--code-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

/* Preview container styles for live effects */
.effect-preview > div {
    max-width: 100%;
    max-height: 100%;
}

.preview-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--sidebar-bg), var(--primary-container));
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.preview-placeholder-icon {
    font-size: 32px;
    opacity: 0.6;
}

.preview-placeholder-text {
    font-size: 12px;
    color: var(--text-2);
}

.effect-content {
    padding: var(--spacing-md);
}

.effect-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-1);
    display: block;
}

.effect-name-zh {
    font-size: 12px;
    color: var(--text-2);
    display: block;
    margin-top: 2px;
}

.effect-description {
    font-size: 11px;
    color: var(--text-2);
    margin: 6px 0 0 0;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.effect-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.action-btn {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--sidebar-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 12px;
    font-weight: 500;
    color: var(--text-1);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    transition: all var(--transition-fast);
}

.action-btn:hover {
    background: var(--primary-container);
    border-color: var(--primary);
    color: var(--primary);
}

.action-btn .arrow {
    font-size: 8px;
    transition: transform var(--transition-fast);
}

.action-btn.expanded .arrow {
    transform: rotate(180deg);
}

/* Expanded Panels */
.effect-panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
    background: var(--bg);
    border-top: 1px solid var(--border);
}

.effect-panel.open {
    max-height: 300px;
    overflow-y: auto;
}

.panel-content {
    padding: var(--spacing-md);
}

.panel-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-2);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.panel-text {
    font-size: 13px;
    color: var(--text-1);
    line-height: 1.6;
    white-space: pre-wrap;
}

.copy-btn {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.copy-btn:hover {
    background: #553f91;
}

.copy-btn.copied {
    background: #10b981;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
    .effects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 1rem;
        --spacing-xl: 1.5rem;
    }

    /* Compact Header */
    .header-bar {
        height: 44px;
        padding: 0 var(--spacing-sm);
        gap: var(--spacing-sm);
    }

    .search-container {
        flex: 1;
        max-width: none;
    }

    .search-box {
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .search-icon {
        width: 16px;
        height: 16px;
    }

    .search-input {
        font-size: 14px;
    }

    .search-input::placeholder {
        font-size: 13px;
    }

    /* Show simplified brand on mobile */
    .brand-container {
        display: flex;
        flex-direction: column;
        align-items: flex-end;
        gap: 0;
    }

    .brand-text {
        font-size: 9px;
        font-weight: 500;
        color: var(--text-2);
    }

    .brand-subtext {
        display: none;
    }

    /* Compact Title Bar */
    .title-bar {
        height: 56px;
    }

    .title-overlay {
        top: 60%;
    }

    .title-overlay h1 {
        font-size: 14px;
        font-weight: 700;
        margin-bottom: 2px;
    }

    .title-overlay p {
        font-size: 9px;
        font-weight: 500;
    }

    /* Mobile Category Pills - Horizontal Scroll */
    .category-pills {
        display: flex !important;
        position: sticky;
        top: 0;
        z-index: 50;
        background: var(--bg);
        padding: var(--spacing-sm);
        gap: var(--spacing-sm);
        overflow-x: auto;
        overflow-y: hidden;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        border-bottom: 1px solid var(--border);
        scrollbar-width: none;
    }

    .category-pills::-webkit-scrollbar {
        display: none;
    }

    .category-pill {
        flex-shrink: 0;
        scroll-snap-align: start;
        padding: var(--spacing-xs) var(--spacing-md);
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: var(--radius-full);
        font-size: 12px;
        font-weight: 500;
        color: var(--text-1);
        white-space: nowrap;
        transition: all var(--transition-fast);
        display: flex;
        align-items: center;
        gap: 4px;
    }

    .category-pill:active {
        transform: scale(0.95);
    }

    .category-pill.active {
        background: var(--primary);
        color: white;
        border-color: var(--primary);
    }

    /* Sidebar Overlay */
    .sidebar {
        position: fixed;
        left: -100%;
        top: 0;
        bottom: 0;
        width: 85%;
        max-width: 320px;
        z-index: 300;
        transition: left var(--transition-normal);
        box-shadow: 2px 0 16px rgba(0, 0, 0, 0.2);
    }

    .sidebar.open {
        left: 0;
    }

    /* Sidebar Backdrop */
    .sidebar-backdrop {
        display: block !important;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 250;
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--transition-normal);
    }

    .sidebar-backdrop.show {
        opacity: 1;
        pointer-events: auto;
    }

    /* Content Area */
    .content-area {
        padding: var(--spacing-sm);
        padding-top: 0;
    }

    .content-header {
        margin-bottom: var(--spacing-md);
        padding: var(--spacing-sm) 0;
    }

    .content-header h2 {
        font-size: 18px;
    }

    .content-header p {
        font-size: 12px;
    }

    /* Single Column Grid */
    .effects-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    /* Mobile Card Styles */
    .effect-card {
        border-radius: var(--radius-lg);
    }

    .effect-preview {
        height: 140px;
    }

    .effect-content {
        padding: var(--spacing-sm);
    }

    .effect-name {
        font-size: 13px;
    }

    .effect-name-zh {
        font-size: 11px;
    }

    .effect-actions {
        gap: var(--spacing-xs);
    }

    .action-btn {
        font-size: 11px;
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    /* Menu Toggle */
    .menu-toggle {
        display: flex !important;
        width: 36px;
        height: 36px;
        margin-right: var(--spacing-xs);
    }

    .menu-toggle span {
        width: 18px;
        height: 2px;
    }

    .menu-toggle span::before,
    .menu-toggle span::after {
        width: 18px;
        height: 2px;
    }

    .menu-toggle span::before { top: -5px; }
    .menu-toggle span::after { top: 5px; }
}

/* Category Pills (Desktop Hidden) */
.category-pills {
    display: none;
}

/* Menu Toggle Button (Mobile) */
.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    background: var(--sidebar-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    margin-right: var(--spacing-md);
}

.menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--primary);
    position: relative;
}

.menu-toggle span::before,
.menu-toggle span::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 2px;
    background: var(--primary);
    left: 0;
}

.menu-toggle span::before { top: -6px; }
.menu-toggle span::after { top: 6px; }

/* ============================================
   UTILITY CLASSES
   ============================================ */
.hidden { display: none !important; }
.fade-in { animation: fadeIn 0.3s ease-out; }

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Loading State */
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    color: var(--text-2);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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