/* ==========================================================================
   SignMotion AI (sign.inclusivehub.ge) - Georgian Sign Language AI Translator
   Brand Colors & Layout Aligned with Main Site (inclusivehub.ge)
   Hyper-Realistic 3D Avatar & MediaPipe Gesture Recognition System
   ========================================================================== */

:root {
    --bg-main: #f8fafc;
    --bg-gradient: radial-gradient(ellipse at top left, #e0f2fe 0%, #f8fafc 50%, #f1f5f9 100%);
    --header-bg: rgba(255, 255, 255, 0.88);
    --card-bg: #ffffff;
    --card-hover: #ffffff;
    --card-shadow: 0 20px 40px -15px rgba(2, 132, 199, 0.08), 0 4px 12px -2px rgba(0, 0, 0, 0.03);
    
    --primary: #0284c7;
    --primary-hover: #0369a1;
    --primary-light: rgba(2, 132, 199, 0.08);
    --primary-glow: rgba(2, 132, 199, 0.25);
    
    --accent-purple: #7c3aed;
    --accent-purple-hover: #6d28d9;
    --accent-green: #10b981;
    
    --text-heading: #0f172a;
    --text-body: #334155;
    --text-muted: #64748b;
    
    --border: #e2e8f0;
    --input-bg: #f1f5f9;
    --stage-bg: #0b1329;
    
    --font-main: 'Google Sans', 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
}

[data-theme="dark"] {
    --bg-main: #0b1329;
    --bg-gradient: radial-gradient(ellipse at top, #1e293b 0%, #0b1329 80%);
    --header-bg: rgba(11, 19, 41, 0.88);
    --card-bg: rgba(26, 38, 64, 0.78);
    --card-hover: rgba(30, 44, 74, 0.88);
    --card-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 172, 236, 0.08);
    
    --primary: #38bdf8;
    --primary-hover: #0284c7;
    --primary-light: rgba(56, 189, 248, 0.15);
    --primary-glow: rgba(56, 189, 248, 0.35);
    
    --accent-purple: #a78bfa;
    --accent-green: #34d399;
    
    --text-heading: #f8fafc;
    --text-body: #cbd5e1;
    --text-muted: #94a3b8;
    
    --border: rgba(255, 255, 255, 0.12);
    --input-bg: rgba(15, 23, 42, 0.75);
    --stage-bg: rgba(10, 16, 30, 0.95);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: var(--font-main);
}

body {
    background: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text-body);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background 0.3s ease, color 0.3s ease;
}

/* Header */
header {
    background: var(--header-bg);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    padding: 14px 24px;
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background 0.3s ease, border-color 0.3s ease;
}

.header-container {
    max-width: 1240px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-group {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-heading);
}

.logo-img {
    height: 38px;
    width: auto;
    object-fit: contain;
}

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

.brand-name {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-heading);
}

.brand-tag {
    font-size: 0.72rem;
    color: var(--accent-purple);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-links {
    display: flex;
    gap: 12px;
    align-items: center;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    padding: 8px 14px;
    border-radius: 12px;
    transition: all 0.2s ease;
}

.nav-link:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.toggle-pill-btn {
    background: var(--input-bg);
    border: 1px solid var(--border);
    color: var(--text-heading);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
}

.toggle-pill-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
}

/* Main Layout Grid */
main {
    flex: 1;
    max-width: 1240px;
    width: 100%;
    margin: 0 auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.layout-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

@media (max-width: 992px) {
    .layout-grid { grid-template-columns: 1fr; }
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 26px;
    box-shadow: var(--card-shadow);
    display: flex;
    flex-direction: column;
    gap: 20px;
    transition: all 0.3s ease;
}

.card-title {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text-heading);
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-desc {
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* 3D Realistic Avatar Stage */
.stage-container {
    position: relative;
    width: 100%;
    height: 440px;
    background: var(--stage-bg);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: inset 0 0 40px rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
}

#avatar-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.stage-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    background: rgba(15, 23, 42, 0.82);
    color: #ffffff;
    backdrop-filter: blur(8px);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    border: 1px solid rgba(255, 255, 255, 0.15);
    display: flex;
    align-items: center;
    gap: 6px;
}

.stage-controls {
    position: absolute;
    bottom: 16px;
    right: 16px;
    display: flex;
    gap: 8px;
}

.stage-btn {
    background: rgba(15, 23, 42, 0.85);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 8px 12px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 700;
    cursor: pointer;
    backdrop-filter: blur(8px);
    transition: all 0.2s ease;
}

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

/* Camera Gesture Recognition View */
.camera-stage {
    position: relative;
    width: 100%;
    height: 300px;
    background: #000000;
    border-radius: 20px;
    overflow: hidden;
    border: 2px solid var(--border);
}

#gesture-video, #gesture-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

#gesture-canvas {
    z-index: 2;
}

/* Text Input & Translator Box */
.input-group {
    display: flex;
    gap: 10px;
}

.text-input {
    flex: 1;
    background: var(--input-bg);
    border: 1px solid var(--border);
    color: var(--text-heading);
    padding: 14px 18px;
    border-radius: 16px;
    font-size: 1rem;
    font-weight: 600;
    outline: none;
    transition: all 0.2s ease;
}

.text-input:focus {
    border-color: var(--accent-purple);
    box-shadow: 0 0 12px rgba(124, 58, 237, 0.2);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 20px;
    border-radius: 16px;
    font-size: 0.92rem;
    font-weight: 700;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.2s ease;
}

.btn-purple {
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-purple-hover));
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(124, 58, 237, 0.3);
}

.btn-purple:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(124, 58, 237, 0.4);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: #ffffff;
    box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-secondary {
    background: var(--input-bg);
    color: var(--text-heading);
    border-color: var(--border);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}

/* Category Phrase Grid */
.phrase-categories {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 6px;
}

.cat-chip {
    background: var(--input-bg);
    border: 1px solid var(--border);
    color: var(--text-heading);
    padding: 8px 14px;
    border-radius: 20px;
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s ease;
}

.cat-chip.active, .cat-chip:hover {
    background: var(--accent-purple);
    color: #ffffff;
    border-color: var(--accent-purple);
}

.phrases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 10px;
    max-height: 260px;
    overflow-y: auto;
    padding-right: 4px;
}

.phrase-card {
    background: var(--input-bg);
    border: 1px solid var(--border);
    padding: 12px 14px;
    border-radius: 16px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 4px;
    transition: all 0.2s ease;
}

.phrase-card:hover {
    border-color: var(--accent-purple);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(124, 58, 237, 0.15);
}

.phrase-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-heading);
}

.phrase-category-tag {
    font-size: 0.72rem;
    color: var(--accent-purple);
    font-weight: 800;
    text-transform: uppercase;
}

/* Result banner */
.result-banner {
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 16px 20px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-heading);
    display: flex;
    align-items: center;
    gap: 12px;
}

footer {
    border-top: 1px solid var(--border);
    background: var(--header-bg);
    backdrop-filter: blur(12px);
    padding: 20px 24px;
    text-align: center;
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-top: auto;
}

footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}