/* === CANVA / NEON TECH METAVERSE THEME === */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700&display=swap');

:root {
    /* Color Palette */
    --bg-main: #f3f4fa; /* Soft light background for the canvas */
    --bg-sidebar: linear-gradient(180deg, #1b1642, #100b2b);
    --bg-card: rgba(255, 255, 255, 0.65);
    
    --text-primary: #1e1e2d;
    --text-secondary: #6b6b80;
    --text-sidebar: #e5e5f7;
    
    --accent-blue: #3a86ff;
    --accent-purple: #8e2de2;
    --accent-glow: rgba(142, 45, 226, 0.4);
    
    --border-glass: rgba(255, 255, 255, 0.4);
    --shadow-soft: 0 10px 30px rgba(31, 38, 135, 0.05);
    --shadow-heavy: 0 16px 40px rgba(31, 38, 135, 0.15);
    
    --font-base: 'Plus Jakarta Sans', sans-serif;
    --radius-heavy: 24px;
    --radius-pill: 50px;
    --transition: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

[data-theme='dark'] {
    --bg-main: #0c0a1f; 
    --bg-sidebar: linear-gradient(180deg, #090717, #03030c);
    --bg-card: rgba(26, 23, 56, 0.65);
    --text-primary: #f0f0ff;
    --text-secondary: #9090b0;
    --border-glass: rgba(255, 255, 255, 0.05);
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.3);
    --shadow-heavy: 0 16px 40px rgba(0, 0, 0, 0.5);
    --accent-glow: rgba(58, 134, 255, 0.6);
}

[data-theme='red'] {
    --bg-sidebar: linear-gradient(180deg, #2b0b13, #150207);
    --accent-blue: #ff2a5f;
    --accent-purple: #ff4b2b;
    --accent-glow: rgba(255, 42, 95, 0.5);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-base);
    line-height: 1.6;
    overflow: hidden; /* Prevents body scroll, allowing layout scroll */
}

/* APP LAYOUT - CANVA STYLE */
.app-layout {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* SIDEBAR */
.sidebar {
    width: 250px;
    background: var(--bg-sidebar);
    color: var(--text-sidebar);
    display: flex;
    flex-direction: column;
    padding: 24px 16px;
    z-index: 100;
    box-shadow: 4px 0 20px rgba(0,0,0,0.1);
    transition: var(--transition);
}

.brand {
    margin-bottom: 40px;
    padding: 0 8px;
}

#logo-title {
    font-size: 1.35rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
}

.side-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}

.nav-btn {
    background: transparent;
    border: none;
    color: #a7a6c5;
    padding: 14px 16px;
    font-size: 0.95rem;
    font-family: var(--font-base);
    font-weight: 500;
    text-align: left;
    border-radius: var(--radius-heavy);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: var(--transition);
}

.nav-btn i {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    transform: translateX(4px);
}

.nav-btn.active {
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
    color: #fff;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.sidebar-footer {
    margin-top: auto;
}

.theme-btn {
    width: 100%;
}

/* MAIN CANVAS */
.main-canvas {
    flex: 1;
    overflow-y: auto;
    padding: 40px;
    position: relative;
    background: radial-gradient(circle at 100% 0%, rgba(142, 45, 226, 0.03) 0%, transparent 40%),
                radial-gradient(circle at 0% 100%, rgba(58, 134, 255, 0.03) 0%, transparent 40%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    animation: scaleIn 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
}

@keyframes scaleIn {
    0% { opacity: 0; transform: scale(0.98) translateY(10px); }
    100% { opacity: 1; transform: scale(1) translateY(0); }
}

/* GLASSMORPHISM CARDS */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-heavy);
    box-shadow: var(--shadow-soft);
    padding: 35px;
    transition: var(--transition);
}

/* BUTTONS */
.gradient-btn {
    border: none;
    padding: 14px 28px;
    font-family: var(--font-base);
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-pill);
    cursor: pointer;
    color: #fff;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
}

.gradient-btn.primary {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    box-shadow: 0 8px 25px var(--accent-glow);
}
.gradient-btn.primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 35px var(--accent-glow);
}

.gradient-btn.magic {
    background: linear-gradient(45deg, #FF416C, #FF4B2B);
    box-shadow: 0 6px 20px rgba(255, 75, 43, 0.3);
    margin-top: 20px;
}
.gradient-btn.magic:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 75, 43, 0.5);
}

.action-pill {
    background: var(--bg-main);
    border: 1px solid var(--border-glass);
    padding: 8px 18px;
    border-radius: var(--radius-pill);
    font-weight: 600;
    font-size: 0.85rem;
    font-family: var(--font-base);
    cursor: pointer;
    color: var(--text-primary);
    box-shadow: 0 4px 10px rgba(0,0,0,0.02);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.action-pill:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.05);
}
.action-pill.warning { color: #d35400; border-color: rgba(211, 84, 0, 0.2); }
.action-pill.success { color: #27ae60; border-color: rgba(39, 174, 96, 0.2); }
.action-pill.danger { background: #e74c3c; color: white; border-color: #e74c3c; box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3); }

/* DRAG DROP 3D */
.drag-drop-3d {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 2px dashed rgba(58, 134, 255, 0.3);
    border-radius: var(--radius-heavy);
    padding: 60px 30px;
    text-align: center;
    position: relative;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: inset 0 0 40px rgba(58, 134, 255, 0.05), var(--shadow-soft);
}
.drag-drop-3d:hover {
    border-color: var(--accent-blue);
    transform: scale(1.01);
    box-shadow: inset 0 0 60px rgba(58, 134, 255, 0.1), var(--shadow-heavy);
}
.drag-drop-3d input[type="file"] {
    position: absolute;
    top:0; left:0; width:100%; height:100%;
    opacity: 0;
    cursor: pointer;
}

.upload-graphics {
    position: relative;
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
}
.upload-graphics .circle {
    position: absolute;
    border-radius: 50%;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
}
.upload-graphics .behind {
    width: 100px; height: 100px;
    background: var(--accent-glow);
    filter: blur(20px);
    animation: pulse 2s infinite alternate;
}
.upload-graphics .mid {
    width: 70px; height: 70px;
    background: rgba(58, 134, 255, 0.1);
    border: 1px solid rgba(58, 134, 255, 0.5);
}
.upload-graphics .front {
    width: 60px; height: 60px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: white;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 10px 20px var(--accent-glow);
}

@keyframes pulse {
    0% { transform: translate(-50%, -50%) scale(0.9); opacity: 0.5; }
    100% { transform: translate(-50%, -50%) scale(1.1); opacity: 1; }
}

/* INTERACTIVE TEXT */
.interactive-text-area {
    font-size: 1.25rem;
    line-height: 1.9;
    padding: 30px;
    background: var(--bg-main);
    border-radius: 16px;
    margin-top: 20px;
    box-shadow: inset 0 2px 10px rgba(0,0,0,0.02);
    min-height: 200px;
    border: 1px solid var(--border-glass);
}


.interactive-text-area .clickable-word {
    padding: 4px 8px;
    border-radius: 8px;
    cursor: pointer;
    transition: 0.2s;
    display: inline-block;
    color: var(--text-secondary);
}


.interactive-text-area .clickable-word:hover {
    background: rgba(58, 134, 255, 0.15);
    transform: translateY(-2px);
}

.interactive-text-area .clickable-word.selected, .interactive-text-area .clickable-word.highlight {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: white !important;
    text-decoration: none !important;
    opacity: 1 !important;
    box-shadow: 0 4px 10px var(--accent-glow);
    transform: scale(1.05);
}


/* TABLES (Words) */
.modern-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0 8px;
    margin-top: 15px;
}
.modern-table th {
    text-align: left;
    padding: 10px 20px;
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.modern-table tbody tr {
    background: var(--bg-card);
    transition: var(--transition);
    box-shadow: 0 4px 10px rgba(0,0,0,0.02);
}
.modern-table tbody tr:hover {
    transform: scale(1.01) translateY(-2px);
    box-shadow: var(--shadow-soft);
    z-index: 10;
    position: relative;
}
.modern-table td {
    padding: 20px;
    border: none;
}
.modern-table tbody tr td:first-child {
    border-top-left-radius: 16px;
    border-bottom-left-radius: 16px;
    font-weight: 700;
    color: var(--accent-purple);
    font-size: 1.1rem;
}
.modern-table tbody tr td:last-child {
    border-top-right-radius: 16px;
    border-bottom-right-radius: 16px;
}

/* CONTROLS BAR 3D */
.controls-bar-3d {
    display: flex;
    gap: 15px;
    align-items: center;
    background: var(--bg-card);
    padding: 15px 20px;
    border-radius: var(--radius-pill);
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border-glass);
    margin-bottom: 25px;
}

.search-bar-3d {
    background: var(--bg-main);
    border-radius: var(--radius-pill);
    display: flex;
    align-items: center;
    padding: 8px 20px;
    flex: 1;
    border: 1px solid var(--border-glass);
    box-shadow: inset 0 2px 5px rgba(0,0,0,0.02);
}
.search-bar-3d input {
    border: none;
    background: transparent;
    padding: 5px 10px;
    width: 100%;
    outline: none;
    font-family: var(--font-base);
    color: var(--text-primary);
}
.search-bar-3d i { color: var(--text-secondary); }

.filter-group-3d {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
}
.filter-group-3d select {
    background: var(--bg-main);
    border: 1px solid var(--border-glass);
    border-radius: 20px;
    padding: 8px 15px;
    font-family: var(--font-base);
    outline: none;
    color: var(--text-primary);
    cursor: pointer;
}

.icon-toggle-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border-glass);
    background: var(--bg-main);
    color: var(--text-secondary);
    display: flex; justify-content: center; align-items: center;
    cursor: pointer;
    transition: var(--transition);
}
.icon-toggle-btn:hover {
    background: var(--bg-card);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    color: var(--accent-blue);
}
.active-icon {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 15px var(--accent-glow);
}

/* FOLDER GRID */
.3d-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 20px;
}
.folder-card {
    background: var(--bg-card);
    border-radius: var(--radius-heavy);
    padding: 30px 20px;
    text-align: center;
    border: 1px solid var(--border-glass);
    box-shadow: var(--shadow-soft);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.folder-card::before {
    content: ''; position: absolute; top:0; left:0; width:100%; height:4px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
    transform: scaleX(0); transition: 0.4s; transform-origin: left;
}
.folder-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-heavy);
}
.folder-card:hover::before { transform: scaleX(1); }
.folder-card i {
    font-size: 3rem;
    background: -webkit-linear-gradient(45deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 20px;
}
.folder-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
}
.folder-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* DROPDOWN */
.dropdown { position: relative; }
.dropdown-content {
    display: none;
    position: absolute;
    right: 0; bottom: 100%; top: auto;
    margin-bottom: 15px;
    background: var(--bg-card);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    min-width: 180px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
    z-index: 1000;
    overflow: hidden;
    padding: 8px;
}
.dropdown-content.show {
    display: block;
    animation: popup 0.2s cubic-bezier(0.25, 0.8, 0.25, 1);
}
@keyframes popup {
    from { opacity: 0; transform: translateY(10px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
.dropdown-content span, .dropdown-content a {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 14px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    border-radius: 10px;
    transition: 0.2s;
    cursor: pointer;
}
.dropdown-content span:hover, .dropdown-content a:hover {
    background: var(--bg-main);
    color: var(--accent-blue);
}

/* HELPERS */
.hidden { display: none !important; }

/* Tooltip */
.tooltip {
    position: fixed;
    background: rgba(16, 11, 43, 0.9);
    color: #fff;
    padding: 12px 18px;
    border-radius: 12px;
    font-size: 0.85rem;
    pointer-events: none;
    z-index: 9999;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

/* Blur classes for definitions */
.hide-translations .translation-cell, .hide-definitions .definition-cell {
    filter: blur(6px);
    opacity: 0.6;
    transition: 0.3s;
    user-select: none;
}
.hide-translations .translation-cell:hover, .hide-definitions .definition-cell:hover {
    filter: blur(0px);
    opacity: 1;
}

/* Make image responsive */
img {
    max-width: 100%;
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
}