:root {
    /* Light Mode Colors */
    --bg-primary: #f8f9fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f3f5;
    --text-primary: #1a1a1a;
    --text-secondary: #6c757d;
    --text-tertiary: #adb5bd;
    
    /* Brand Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #8b5cf6;
    --accent: #ec4899;
    
    /* Status Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    
    /* Risk Level Colors */
    --risk-low: #10b981;
    --risk-medium: #f59e0b;
    --risk-high: #f97316;
    --risk-very-high: #ef4444;
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-tertiary: #64748b;
    
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(148, 163, 184, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

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

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

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(236, 72, 153, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
    animation: backgroundShift 20s ease-in-out infinite;
}

@keyframes backgroundShift {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.header {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    width: 2.5rem;
    height: 2.5rem;
    color: var(--primary);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.theme-toggle,
.lang-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-xs) var(--spacing-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.theme-toggle {
    width: 2.5rem;
    height: 2.5rem;
    justify-content: center;
}

.theme-toggle svg {
    width: 1.25rem;
    height: 1.25rem;
    color: var(--text-primary);
}

.theme-toggle .moon-icon {
    display: none;
}

[data-theme="dark"] .theme-toggle .sun-icon {
    display: none;
}

[data-theme="dark"] .theme-toggle .moon-icon {
    display: block;
}

.theme-toggle:hover,
.lang-toggle:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.lang-toggle {
    font-weight: 600;
    color: var(--text-secondary);
}

.lang-toggle .lang-en {
    opacity: 0.5;
}

[data-lang="en"] .lang-toggle .lang-id {
    opacity: 0.5;
}

[data-lang="en"] .lang-toggle .lang-en {
    opacity: 1;
}

/* Main Content */
.main {
    padding: var(--spacing-xl) 0;
}

/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
}

/* Document Types */
.document-types {
    margin-bottom: var(--spacing-xl);
}

.section-label {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.type-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.type-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    position: relative;
    overflow: hidden;
}

.type-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    opacity: 0;
    transition: opacity var(--transition-base);
    z-index: -1;
}

.type-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.type-card.active {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.type-card.active::before {
    opacity: 0.1;
}

.type-icon {
    font-size: 2rem;
}

.type-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
}

/* Upload Section */
.upload-section {
    max-width: 700px;
    margin: 0 auto;
}

.upload-zone {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 2px dashed var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
}

.upload-zone:hover,
.upload-zone.drag-over {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.05);
    transform: scale(1.02);
}

.upload-icon {
    width: 4rem;
    height: 4rem;
    color: var(--primary);
    margin: 0 auto var(--spacing-md);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.upload-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.upload-subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.upload-btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border: none;
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.upload-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* File Preview */
.file-preview {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    animation: slideIn 0.3s ease-out;
}

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

.file-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.file-icon {
    width: 2.5rem;
    height: 2.5rem;
    color: var(--primary);
}

.file-name {
    font-weight: 600;
    color: var(--text-primary);
}

.file-size {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.remove-file {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.remove-file svg {
    width: 1.5rem;
    height: 1.5rem;
    color: var(--text-secondary);
}

.remove-file:hover {
    background: var(--bg-tertiary);
}

.remove-file:hover svg {
    color: var(--danger);
}

/* Analyze Button */
.analyze-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1.125rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.analyze-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

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

.analyze-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

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

.btn-icon {
    width: 1.5rem;
    height: 1.5rem;
}

/* Results Section */
.results-section {
    margin-top: var(--spacing-xl);
    animation: fadeIn 0.5s ease-out;
}

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

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

.results-header h2 {
    font-size: 2rem;
    font-weight: 800;
}

.new-analysis-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-primary);
}

.new-analysis-btn svg {
    width: 1.25rem;
    height: 1.25rem;
}

.new-analysis-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

/* Analysis Card */
.analysis-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.5s ease-out;
}

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

.analysis-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.doc-type-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
}

/* Score Gauge */
.score-section {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.score-gauge {
    position: relative;
    width: 200px;
    height: 200px;
    margin: 0 auto var(--spacing-md);
}

.gauge-bg,
.gauge-fill {
    fill: none;
    stroke-width: 12;
}

.gauge-bg {
    stroke: var(--bg-tertiary);
}

.gauge-fill {
    stroke-linecap: round;
    transition: stroke-dashoffset 1s ease-out, stroke 0.3s;
}

.gauge-fill.low { stroke: var(--risk-low); }
.gauge-fill.medium { stroke: var(--risk-medium); }
.gauge-fill.high { stroke: var(--risk-high); }
.gauge-fill.very-high { stroke: var(--risk-very-high); }

.score-value {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.risk-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.risk-badge.low {
    background: rgba(16, 185, 129, 0.1);
    color: var(--risk-low);
}

.risk-badge.medium {
    background: rgba(245, 158, 11, 0.1);
    color: var(--risk-medium);
}

.risk-badge.high {
    background: rgba(249, 115, 22, 0.1);
    color: var(--risk-high);
}

.risk-badge.very-high {
    background: rgba(239, 68, 68, 0.1);
    color: var(--risk-very-high);
}

/* Details Section */
.details-section {
    margin-top: var(--spacing-lg);
}

.detail-card {
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.detail-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.detail-list {
    list-style: none;
}

.detail-list li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xs);
}

.detail-list li::before {
    content: '•';
    color: var(--primary);
    font-weight: bold;
    font-size: 1.25rem;
}

/* Highlighted Text */
.highlighted-text {
    background: var(--bg-tertiary);
    border-left: 4px solid var(--warning);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin: var(--spacing-sm) 0;
    font-style: italic;
    color: var(--text-secondary);
}

.highlight {
    background: rgba(245, 158, 11, 0.3);
    padding: 2px 4px;
    border-radius: 3px;
}

/* Export Buttons */
.export-section {
    margin-top: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.export-btn {
    flex: 1;
    min-width: 150px;
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    color: var(--text-primary);
}

.export-btn svg {
    width: 1.25rem;
    height: 1.25rem;
}

.export-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

/* History Section */
.history-section {
    margin-top: var(--spacing-xl);
}

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

.section-header h2 {
    font-size: 2rem;
    font-weight: 800;
}

.clear-history-btn {
    background: transparent;
    border: 1px solid var(--danger);
    color: var(--danger);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.clear-history-btn svg {
    width: 1.25rem;
    height: 1.25rem;
}

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

.history-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.history-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    transition: all var(--transition-base);
    cursor: pointer;
}

.history-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.history-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
}

.history-doc-name {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.history-score {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.history-meta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--glass-border);
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-xl);
    text-align: center;
    color: var(--text-secondary);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-text {
    margin-top: var(--spacing-md);
    color: white;
    font-size: 1.125rem;
    font-weight: 600;
}

/* Responsive Design */
@media (max-width: 768px) {
    .type-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }
    
    .results-header,
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .history-grid {
        grid-template-columns: 1fr;
    }
    
    .export-section {
        flex-direction: column;
    }
    
    .export-btn {
        width: 100%;
    }
}

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

.text-center {
    text-align: center;
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}