/* ============================================
   Image Data Extract Python — Enhanced UI
   Liquid Glass · 3D Claymorphism · Animations
   Developed by issu321
   ============================================ */

:root {
    --bg-primary: #f0f4f8;
    --bg-secondary: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.25);
    --bg-glass-hover: rgba(255, 255, 255, 0.4);
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --accent-primary: #667eea;
    --accent-secondary: #764ba2;
    --accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --border-color: rgba(255, 255, 255, 0.3);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
    --radius-sm: 12px;
    --radius-md: 20px;
    --radius-lg: 30px;
    --radius-xl: 40px;
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    --transition-bounce: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-glass: rgba(30, 41, 59, 0.4);
    --bg-glass-hover: rgba(30, 41, 59, 0.6);
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --accent-primary: #60a5fa;
    --accent-secondary: #818cf8;
    --accent-gradient: linear-gradient(135deg, #60a5fa 0%, #818cf8 100%);
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.6);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background 0.4s ease, color 0.4s ease;
    min-height: 100vh;
    overflow-x: hidden;
}

::selection {
    background: var(--accent-primary);
    color: white;
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb {
    background: linear-gradient(var(--accent-primary), var(--accent-secondary));
    border-radius: 10px;
}

/* ─── Liquid Glass Navbar ─── */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2.5rem;
    background: linear-gradient(135deg, rgba(255,255,255,0.12), rgba(255,255,255,0.06));
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid rgba(255,255,255,0.18);
    box-shadow: 0 4px 30px rgba(0,0,0,0.05);
    transition: var(--transition);
}

.navbar.scrolled {
    background: linear-gradient(135deg, rgba(255,255,255,0.25), rgba(255,255,255,0.15));
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    padding: 0.75rem 2.5rem;
}

[data-theme="dark"] .navbar {
    background: linear-gradient(135deg, rgba(15,23,42,0.7), rgba(15,23,42,0.5));
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

[data-theme="dark"] .navbar.scrolled {
    background: linear-gradient(135deg, rgba(15,23,42,0.85), rgba(15,23,42,0.7));
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

.nav-brand:hover { transform: scale(1.05); }

.logo {
    font-size: 1.6rem;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
    transition: var(--transition);
}

.nav-brand:hover .logo { transform: rotate(-10deg) scale(1.2); }

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    border-radius: 50px;
    transition: var(--transition-bounce);
    position: relative;
    backdrop-filter: blur(4px);
}

.nav-links a:hover {
    color: var(--accent-primary);
    background: rgba(255,255,255,0.15);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102,126,234,0.15);
}

.nav-links a.active {
    color: white;
    background: var(--accent-gradient);
    box-shadow: 0 4px 15px rgba(102,126,234,0.4);
    transform: translateY(-2px);
}

.nav-links a.active:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 25px rgba(102,126,234,0.5);
}

.theme-toggle {
    background: linear-gradient(135deg, rgba(255,255,255,0.2), rgba(255,255,255,0.1));
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: 50%;
    width: 42px; height: 42px;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-bounce);
    backdrop-filter: blur(10px);
    margin-left: 0.5rem;
    box-shadow: 0 4px 10px rgba(0,0,0,0.08);
}

.theme-toggle:hover {
    background: linear-gradient(135deg, rgba(255,255,255,0.35), rgba(255,255,255,0.2));
    transform: scale(1.15) rotate(15deg);
    box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}

/* ─── Main Layout ─── */
main {
    padding-top: 100px;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

.page-main {
    padding: 110px 1rem 3rem;
    max-width: 1200px;
    margin: 0 auto;
    min-height: calc(100vh - 200px);
}

/* ─── Hero ─── */
.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    min-height: calc(100vh - 100px);
    padding: 2rem 0 4rem;
    perspective: 1200px;
    transform-style: preserve-3d;
}

.hero-content {
    animation: fadeInUp 1s ease-out;
    transform-style: preserve-3d;
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 4px 8px rgba(102,126,234,0.2));
    animation: gradientShift 6s ease infinite;
    background-size: 200% 200%;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.7;
    max-width: 90%;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    perspective: 800px;
}

/* ─── 3D Liquid Glass Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2.25rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-bounce);
    border: 1px solid rgba(255,255,255,0.25);
    outline: none;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(12px) saturate(140%);
    background: linear-gradient(135deg, rgba(255,255,255,0.18), rgba(255,255,255,0.08));
    box-shadow: 0 6px 20px rgba(0,0,0,0.08), inset 0 1px 0 rgba(255,255,255,0.25), 0 0 0 0 rgba(102,126,234,0);
    transform-style: preserve-3d;
    letter-spacing: 0.3px;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    transition: 0.7s;
}

.btn:hover::before { left: 100%; }

.btn:hover {
    transform: translateY(-5px) scale(1.04) rotateX(8deg);
    box-shadow: 0 14px 35px rgba(102,126,234,0.25), inset 0 1px 0 rgba(255,255,255,0.35), 0 0 20px rgba(102,126,234,0.15);
    border-color: rgba(255,255,255,0.4);
}

.btn:active {
    transform: translateY(1px) scale(0.97) rotateX(0deg);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    border: none;
    box-shadow: 0 6px 20px rgba(102,126,234,0.4), inset 0 1px 0 rgba(255,255,255,0.3);
}

.btn-primary:hover {
    box-shadow: 0 14px 35px rgba(102,126,234,0.5), inset 0 1px 0 rgba(255,255,255,0.4), 0 0 30px rgba(102,126,234,0.3);
    filter: brightness(1.1);
}

.btn-secondary {
    background: linear-gradient(135deg, rgba(255,255,255,0.2), rgba(255,255,255,0.1));
    color: var(--text-primary);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-outline:hover {
    background: linear-gradient(135deg, rgba(255,255,255,0.15), rgba(255,255,255,0.05));
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.btn-full { width: 100%; margin-top: 1rem; }

/* ─── Hero Visual — 3D Floating Cards ─── */
.hero-visual {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    align-items: center;
    position: relative;
    perspective: 1000px;
    transform-style: preserve-3d;
}

.glass-card {
    background: linear-gradient(135deg, rgba(255,255,255,0.2), rgba(255,255,255,0.1));
    backdrop-filter: blur(20px) saturate(160%);
    -webkit-backdrop-filter: blur(20px) saturate(160%);
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: var(--radius-lg);
    padding: 1.75rem 2.5rem;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1), inset 0 1px 0 rgba(255,255,255,0.2);
    transition: var(--transition-bounce);
    transform-style: preserve-3d;
    transform: translateZ(20px);
    cursor: pointer;
}

.glass-card:hover {
    transform: translateZ(50px) translateY(-12px) rotateX(8deg) rotateY(-6deg) scale(1.05);
    box-shadow: 0 20px 50px rgba(0,0,0,0.15), inset 0 1px 0 rgba(255,255,255,0.3);
    background: linear-gradient(135deg, rgba(255,255,255,0.3), rgba(255,255,255,0.15));
}

.card-icon { font-size: 2.8rem; margin-bottom: 0.75rem; filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1)); transition: var(--transition); }
.glass-card:hover .card-icon { transform: scale(1.3) rotate(-10deg); }

.card-text { font-weight: 700; color: var(--text-primary); font-size: 1.1rem; }

.floating { animation: float 5s ease-in-out infinite; }
.floating:nth-child(2) { animation-delay: 1.2s; }
.floating:nth-child(3) { animation-delay: 2.4s; }

@keyframes float {
    0%, 100% { transform: translateZ(20px) translateY(0px); }
    50% { transform: translateZ(40px) translateY(-18px); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(40px) rotateX(10deg); }
    to { opacity: 1; transform: translateY(0) rotateX(0); }
}

/* ─── Section Headers ─── */
.section-header {
    text-align: center;
    margin-bottom: 3.5rem;
    padding-top: 2rem;
}

.section-header h2 {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-header p {
    color: var(--text-muted);
    font-size: 1.15rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ─── Upload Section ─── */
.upload-section { padding: 3rem 0 5rem; }

.upload-container { max-width: 650px; margin: 0 auto; perspective: 800px; }

.upload-area {
    position: relative;
    border: 2px dashed rgba(255,255,255,0.4);
    border-radius: var(--radius-lg);
    padding: 3.5rem 2rem;
    text-align: center;
    background: linear-gradient(135deg, rgba(255,255,255,0.15), rgba(255,255,255,0.05));
    backdrop-filter: blur(16px) saturate(150%);
    -webkit-backdrop-filter: blur(16px) saturate(150%);
    transition: var(--transition-bounce);
    cursor: pointer;
    box-shadow: 0 8px 32px rgba(0,0,0,0.05), inset 0 1px 0 rgba(255,255,255,0.2);
    transform-style: preserve-3d;
}

.upload-area:hover, .upload-area.dragover {
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, rgba(102,126,234,0.08), rgba(118,75,162,0.05));
    transform: scale(1.02) translateY(-6px) rotateX(3deg);
    box-shadow: 0 20px 50px rgba(102,126,234,0.12), inset 0 1px 0 rgba(255,255,255,0.3);
}

.upload-area input[type="file"] {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    opacity: 0;
    cursor: pointer;
}

.upload-icon { font-size: 3.5rem; margin-bottom: 1.25rem; filter: drop-shadow(0 4px 6px rgba(0,0,0,0.08)); transition: var(--transition); }
.upload-area:hover .upload-icon { transform: scale(1.2) translateY(-5px); }

.upload-content h3 {
    font-size: 1.6rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 700;
}

.upload-content p { color: var(--text-muted); margin-bottom: 0.75rem; font-size: 1.05rem; }

.file-types {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: linear-gradient(135deg, rgba(255,255,255,0.3), rgba(255,255,255,0.15));
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255,255,255,0.2);
}

/* ─── Features Grid — 3D Claymorphism ─── */
.features-section { padding: 3rem 0 5rem; }

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    perspective: 1200px;
    transform-style: preserve-3d;
}

.feature-card {
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    transition: var(--transition-bounce);
    position: relative;
    transform-style: preserve-3d;
    background: var(--bg-secondary);
    border: none;
    box-shadow:
        12px 12px 24px rgba(163,177,198,0.2),
        -12px -12px 24px rgba(255,255,255,0.7),
        inset 4px 4px 8px rgba(255,255,255,0.9),
        inset -4px -4px 8px rgba(163,177,198,0.1);
}

[data-theme="dark"] .feature-card {
    box-shadow:
        12px 12px 24px rgba(0,0,0,0.3),
        -12px -12px 24px rgba(255,255,255,0.05),
        inset 4px 4px 8px rgba(255,255,255,0.05),
        inset -4px -4px 8px rgba(0,0,0,0.2);
}

.feature-card:hover {
    transform: translateY(-14px) scale(1.03) rotateX(8deg) rotateY(-4deg) translateZ(30px);
    box-shadow:
        20px 20px 40px rgba(163,177,198,0.3),
        -8px -8px 20px rgba(255,255,255,0.6),
        inset 2px 2px 4px rgba(255,255,255,0.8),
        inset -2px -2px 4px rgba(163,177,198,0.08);
    z-index: 10;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.25rem;
    display: inline-block;
    transition: var(--transition-bounce);
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.1));
}

.feature-card:hover .feature-icon {
    transform: scale(1.3) rotate(-8deg) translateZ(20px);
}

.feature-card h3 {
    font-size: 1.35rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-weight: 700;
}

.feature-card p { color: var(--text-secondary); line-height: 1.7; font-size: 1.02rem; }

/* ─── How It Works — 3D Step Cards ─── */
.how-it-works { padding: 3rem 0 5rem; }

.steps-container {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 1.5rem;
    flex-wrap: wrap;
    max-width: 1100px;
    margin: 0 auto;
    perspective: 1000px;
    transform-style: preserve-3d;
}

.step-card {
    background: linear-gradient(135deg, rgba(255,255,255,0.15), rgba(255,255,255,0.08));
    backdrop-filter: blur(15px) saturate(140%);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-lg);
    padding: 2.5rem 1.5rem;
    text-align: center;
    min-width: 200px;
    flex: 1;
    transition: var(--transition-bounce);
    position: relative;
    transform-style: preserve-3d;
    box-shadow: 0 8px 24px rgba(0,0,0,0.06), inset 0 1px 0 rgba(255,255,255,0.2);
}

.step-card:hover {
    transform: translateY(-12px) translateZ(40px) rotateX(8deg) scale(1.03);
    box-shadow: 0 16px 40px rgba(0,0,0,0.1), inset 0 1px 0 rgba(255,255,255,0.3);
    background: linear-gradient(135deg, rgba(255,255,255,0.25), rgba(255,255,255,0.12));
    z-index: 10;
}

.step-number {
    position: absolute;
    top: -18px; left: 50%;
    transform: translateX(-50%) translateZ(30px);
    width: 36px; height: 36px;
    background: var(--accent-gradient);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.9rem;
    box-shadow: 0 4px 12px rgba(102,126,234,0.4);
    transition: var(--transition);
}

.step-card:hover .step-number {
    transform: translateX(-50%) translateZ(50px) scale(1.2);
    box-shadow: 0 6px 20px rgba(102,126,234,0.5);
}

.step-icon { font-size: 2.8rem; margin: 0.75rem 0 1rem; transition: var(--transition); }
.step-card:hover .step-icon { transform: scale(1.25) translateZ(20px); }

.step-card h3 { font-size: 1.15rem; margin-bottom: 0.5rem; color: var(--text-primary); font-weight: 700; }
.step-card p { color: var(--text-muted); font-size: 0.95rem; }

.step-connector {
    width: 50px; height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    align-self: center;
    opacity: 0.6;
    border-radius: 3px;
    position: relative;
    transition: var(--transition);
}

.step-connector::after {
    content: '→';
    position: absolute;
    right: -12px; top: -10px;
    color: var(--accent-primary);
    font-size: 1.1rem;
    font-weight: 700;
}

/* ─── Result Page ─── */
.result-main {
    padding: 110px 1rem 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

.result-container { animation: fadeInUp 0.6s ease-out; }
.result-container.hidden { display: none; }

.result-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    margin-top: 1rem;
    perspective: 1200px;
}

.image-preview-section, .results-section {
    background: linear-gradient(135deg, rgba(255,255,255,0.15), rgba(255,255,255,0.08));
    backdrop-filter: blur(15px) saturate(140%);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: 0 8px 32px rgba(0,0,0,0.06), inset 0 1px 0 rgba(255,255,255,0.2);
    transition: var(--transition);
    transform-style: preserve-3d;
}

.image-preview-section:hover, .results-section:hover {
    transform: translateY(-4px) rotateX(2deg);
    box-shadow: 0 12px 40px rgba(0,0,0,0.1);
}

.image-preview-section h3, .results-section h3 {
    margin-bottom: 1.25rem;
    font-size: 1.3rem;
    color: var(--text-primary);
    font-weight: 700;
}

.image-preview {
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-secondary);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    transition: var(--transition);
}

.image-preview:hover { transform: scale(1.02); box-shadow: 0 8px 24px rgba(0,0,0,0.12); }
.image-preview img { width: 100%; height: auto; display: block; transition: var(--transition); }
.image-preview:hover img { transform: scale(1.05); }

/* Summary Card */
.summary-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
    margin-bottom: 2rem;
    padding: 1.75rem;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(255,255,255,0.2), rgba(255,255,255,0.1));
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.25);
}

.summary-item {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.summary-item:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-2px);
}

.summary-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.summary-value {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--accent-primary);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Text Area */
.text-extract-section { margin-bottom: 2rem; }

.text-extract-section label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1.05rem;
}

.extract-textarea {
    width: 100%;
    padding: 1.25rem;
    border: 2px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0.05));
    color: var(--text-primary);
    font-family: 'Fira Code', 'Courier New', monospace;
    font-size: 0.95rem;
    line-height: 1.7;
    resize: vertical;
    transition: var(--transition);
    backdrop-filter: blur(4px);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.03);
}

.extract-textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px rgba(102,126,234,0.1), inset 0 2px 4px rgba(0,0,0,0.03);
    background: linear-gradient(135deg, rgba(255,255,255,0.15), rgba(255,255,255,0.08));
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    perspective: 600px;
}

/* Loading */
.loading-container {
    text-align: center;
    padding: 5rem 2rem;
    max-width: 500px;
    margin: 0 auto;
}

.loading-spinner {
    width: 70px; height: 70px;
    border: 4px solid rgba(255,255,255,0.2);
    border-top-color: var(--accent-primary);
    border-right-color: var(--accent-secondary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 2rem;
    box-shadow: 0 0 20px rgba(102,126,234,0.2);
}

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

.loading-container h2 { margin-bottom: 0.5rem; color: var(--text-primary); font-size: 1.8rem; }
.loading-container > p { color: var(--text-muted); margin-bottom: 2.5rem; font-size: 1.05rem; }

.loading-steps {
    text-align: left;
    background: linear-gradient(135deg, rgba(255,255,255,0.15), rgba(255,255,255,0.08));
    border-radius: var(--radius-md);
    padding: 1.25rem;
    border: 1px solid rgba(255,255,255,0.2);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.loading-step {
    padding: 0.85rem 1.25rem;
    color: var(--text-muted);
    font-size: 0.95rem;
    transition: var(--transition);
    border-radius: var(--radius-sm);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.loading-step::before {
    content: '○';
    font-size: 0.8rem;
    transition: var(--transition);
}

.loading-step.active {
    background: linear-gradient(135deg, rgba(255,255,255,0.2), rgba(255,255,255,0.1));
    color: var(--accent-primary);
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    transform: translateX(8px);
}

.loading-step.active::before {
    content: '●';
    color: var(--accent-primary);
}

.loading-step:last-child { margin-bottom: 0; }

/* ─── About Page ─── */
.about-container h1 {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 2.5rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 900;
    filter: drop-shadow(0 4px 8px rgba(102,126,234,0.15));
}

.about-card {
    margin-bottom: 2rem;
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(255,255,255,0.15), rgba(255,255,255,0.08));
    backdrop-filter: blur(15px) saturate(140%);
    border: 1px solid rgba(255,255,255,0.2);
    box-shadow: 0 8px 32px rgba(0,0,0,0.06), inset 0 1px 0 rgba(255,255,255,0.2);
    transition: var(--transition-bounce);
    transform-style: preserve-3d;
}

.about-card:hover {
    transform: translateY(-8px) rotateX(4deg) scale(1.01);
    box-shadow: 0 16px 40px rgba(0,0,0,0.1);
}

.about-card h2 {
    font-size: 1.6rem;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
    font-weight: 700;
}

.about-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
    font-size: 1.05rem;
}

.about-card ul { list-style: none; padding-left: 0; }

.about-card ul li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    color: var(--text-secondary);
    font-size: 1.05rem;
    transition: var(--transition);
}

.about-card ul li:hover {
    transform: translateX(5px);
    color: var(--accent-primary);
}

.about-card ul li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: bold;
    font-size: 1.2rem;
    transition: var(--transition);
}

.about-card ul li:hover::before { transform: scale(1.3); }

.language-tags {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.lang-tag {
    padding: 0.6rem 1.25rem;
    background: var(--accent-gradient);
    color: white;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.95rem;
    box-shadow: 0 4px 12px rgba(102,126,234,0.3);
    transition: var(--transition-bounce);
    cursor: default;
}

.lang-tag:hover {
    transform: translateY(-3px) scale(1.08);
    box-shadow: 0 8px 20px rgba(102,126,234,0.4);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1.25rem;
}

.tech-item {
    padding: 1.25rem;
    background: linear-gradient(135deg, rgba(255,255,255,0.2), rgba(255,255,255,0.1));
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 700;
    color: var(--text-primary);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05), inset 0 1px 0 rgba(255,255,255,0.3);
    transition: var(--transition-bounce);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255,255,255,0.15);
}

.tech-item:hover {
    transform: translateY(-6px) scale(1.05) rotateX(8deg);
    box-shadow: 0 10px 25px rgba(102,126,234,0.15);
    background: linear-gradient(135deg, rgba(102,126,234,0.1), rgba(118,75,162,0.05));
    color: var(--accent-primary);
    border-color: rgba(102,126,234,0.2);
}

/* ─── Contact Page ─── */
.contact-container h1 {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 2.5rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 900;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
    perspective: 1000px;
}

.contact-card {
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(255,255,255,0.15), rgba(255,255,255,0.08));
    backdrop-filter: blur(15px) saturate(140%);
    border: 1px solid rgba(255,255,255,0.2);
    box-shadow: 0 8px 32px rgba(0,0,0,0.06), inset 0 1px 0 rgba(255,255,255,0.2);
    transition: var(--transition-bounce);
    text-align: center;
    transform-style: preserve-3d;
}

.contact-card:hover {
    transform: translateY(-12px) rotateX(8deg) scale(1.02);
    box-shadow: 0 20px 50px rgba(0,0,0,0.1);
}

.contact-icon {
    font-size: 3.5rem;
    margin-bottom: 1.25rem;
    display: inline-block;
    transition: var(--transition-bounce);
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.1));
}

.contact-card:hover .contact-icon {
    transform: scale(1.3) rotate(-10deg) translateZ(30px);
}

.contact-card h3 {
    font-size: 1.4rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-weight: 700;
}

.contact-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.25rem;
}

.contact-card a {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 700;
    transition: var(--transition);
    display: inline-block;
}

.contact-card a:hover {
    transform: translateY(-2px);
    text-decoration: underline;
    filter: brightness(1.2);
}

/* ─── Footer ─── */
.footer {
    margin-top: 5rem;
    padding: 2.5rem;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.15);
    background: linear-gradient(135deg, rgba(255,255,255,0.08), rgba(255,255,255,0.03));
    backdrop-filter: blur(10px);
}

.footer-content p { color: var(--text-muted); margin-bottom: 0.5rem; font-size: 0.95rem; }

.footer-content a {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 700;
    transition: var(--transition);
}

.footer-content a:hover { text-decoration: underline; filter: brightness(1.2); }

/* ─── Flash Messages ─── */
.flash-messages {
    position: fixed;
    top: 90px; right: 1.5rem;
    z-index: 1001;
    max-width: 400px;
}

.flash-message {
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    margin-bottom: 0.75rem;
    animation: slideIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    backdrop-filter: blur(16px) saturate(140%);
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    border: 1px solid rgba(255,255,255,0.2);
}

.flash-message.error {
    background: linear-gradient(135deg, rgba(245,101,101,0.9), rgba(245,101,101,0.7));
    color: white;
}

.flash-message.success {
    background: linear-gradient(135deg, rgba(72,187,120,0.9), rgba(72,187,120,0.7));
    color: white;
}

@keyframes slideIn {
    from { transform: translateX(100%) rotateY(-20deg); opacity: 0; }
    to { transform: translateX(0) rotateY(0); opacity: 1; }
}

/* ─── Scroll Animation Utilities ─── */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(50px) rotateX(15deg);
    transition: all 0.9s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.animate-on-scroll.animate-in {
    opacity: 1;
    transform: translateY(0) rotateX(0);
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        min-height: auto;
        padding: 2rem 0 3rem;
    }
    .hero-title { font-size: 2.8rem; }
    .hero-visual { display: none; }
    .hero-buttons { justify-content: center; }
    .result-layout { grid-template-columns: 1fr; }
    .steps-container {
        flex-direction: column;
        align-items: center;
    }
    .step-connector {
        width: 3px; height: 40px;
        transform: rotate(90deg);
    }
    .summary-card { grid-template-columns: 1fr; }
    .navbar { padding: 0.75rem 1rem; }
    .nav-links { gap: 0.25rem; }
    .nav-links a { font-size: 0.85rem; padding: 0.4rem 0.75rem; }
    .features-grid { grid-template-columns: 1fr; }
    .action-buttons { flex-direction: column; }
    .btn { width: 100%; }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2.2rem; }
    .section-header h2 { font-size: 2rem; }
    .upload-area { padding: 2.5rem 1rem; }
    .about-container h1, .contact-container h1 { font-size: 2.2rem; }
}

.hidden { display: none !important; }