/* ============================================
   Meeting Notes Generator - Styles
   Inspired by THUAS design: Modern, Clean, Professional
   ============================================ */

/* CSS Variables */
:root {
    /* Colors - THUAS inspired palette */
    --primary: #E31837;          /* THUAS Red */
    --primary-dark: #B8142D;
    --primary-light: #FF4D6A;
    --secondary: #1A1A2E;        /* Deep Navy */
    --accent: #16213E;
    --background: #FAFBFC;
    --surface: #FFFFFF;
    --surface-elevated: #FFFFFF;
    --text-primary: #1A1A2E;
    --text-secondary: #5A5A72;
    --text-muted: #9494A6;
    --border: #E8E8EE;
    --border-light: #F0F0F5;
    --success: #22C55E;
    --warning: #F59E0B;
    --error: #EF4444;
    
    /* Typography */
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-light);
    transition: box-shadow var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-xl);
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--space-sm) 0;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition-base);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
}

.nav-links a.active::after,
.nav-links a:hover::after {
    width: 100%;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px var(--space-lg) var(--space-3xl);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(227, 24, 55, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(22, 33, 62, 0.06) 0%, transparent 40%),
        linear-gradient(180deg, var(--background) 0%, #F5F5FA 100%);
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 800px;
}

.badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-lg);
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-xl);
}

.hero-credit {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 14px rgba(227, 24, 55, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(227, 24, 55, 0.35);
}

.btn-primary:disabled {
    background: var(--text-muted);
    box-shadow: none;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: var(--surface);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--background);
    border-color: var(--text-muted);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

.btn-text {
    background: transparent;
    color: var(--text-secondary);
    padding: var(--space-sm) var(--space-md);
}

.btn-text:hover {
    color: var(--primary);
}

.btn-large {
    padding: var(--space-lg) var(--space-2xl);
    font-size: 1rem;
}

.btn-sm {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.8125rem;
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    background: var(--background);
    color: var(--error);
}

/* ============================================
   Features Section
   ============================================ */
.features {
    padding: var(--space-3xl) 0;
    background: var(--surface);
}

.features h2 {
    text-align: center;
    margin-bottom: var(--space-2xl);
    font-size: 2rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-xl);
}

.feature-card {
    text-align: center;
    padding: var(--space-xl);
    background: var(--background);
    border-radius: var(--radius-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.feature-card h3 {
    font-family: var(--font-body);
    font-size: 1.125rem;
    margin-bottom: var(--space-sm);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* ============================================
   Upload Section
   ============================================ */
.upload-section {
    padding: var(--space-3xl) 0;
    background: linear-gradient(180deg, var(--background) 0%, #F0F0F8 100%);
}

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

.upload-container h2 {
    text-align: center;
    margin-bottom: var(--space-2xl);
    font-size: 2rem;
}

/* Step Cards */
.step-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-md);
    transition: opacity var(--transition-base);
}

.step-card.disabled {
    opacity: 0.6;
    pointer-events: none;
}

.step-card.active {
    opacity: 1;
    pointer-events: auto;
}

.step-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    font-weight: 600;
    border-radius: var(--radius-full);
}

.step-header h3 {
    font-family: var(--font-body);
    font-size: 1.125rem;
    font-weight: 600;
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    text-align: center;
    transition: all var(--transition-base);
    background: var(--background);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary);
    background: rgba(227, 24, 55, 0.02);
}

.upload-icon {
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

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

.upload-hint {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-top: var(--space-md);
}

/* Uploaded File Display */
.uploaded-file {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    background: var(--background);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

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

.file-icon {
    font-size: 1.5rem;
}

.file-details {
    display: flex;
    flex-direction: column;
}

.file-name {
    font-weight: 500;
    color: var(--text-primary);
}

.file-size {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* Model Selection */
.model-selection {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.model-group label:first-child {
    display: block;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.model-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-md);
}

.model-option {
    cursor: pointer;
}

.model-option input {
    display: none;
}

.model-card {
    padding: var(--space-md);
    background: var(--background);
    border: 2px solid var(--border);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.model-option:hover .model-card {
    border-color: var(--primary-light);
}

.model-option input:checked + .model-card {
    border-color: var(--primary);
    background: rgba(227, 24, 55, 0.04);
}

.model-badge {
    display: inline-block;
    padding: 2px 8px;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-xs);
}

.model-badge.fast {
    background: #DCFCE7;
    color: #166534;
}

.model-badge.multi {
    background: #DBEAFE;
    color: #1E40AF;
}

.model-badge.balanced {
    background: #FEF3C7;
    color: #92400E;
}

.model-badge.best {
    background: #F3E8FF;
    color: #7C3AED;
}

.model-card strong {
    display: block;
    font-size: 0.9375rem;
    margin-bottom: var(--space-xs);
}

.model-card p {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin: 0;
}

/* Advanced Settings */
.advanced-toggle {
    margin-top: var(--space-md);
}

.advanced-toggle .chevron {
    transition: transform var(--transition-base);
}

.advanced-toggle.open .chevron {
    transform: rotate(180deg);
}

.advanced-panel {
    margin-top: var(--space-lg);
    border-top: 1px solid var(--border);
    padding-top: var(--space-lg);
}

.advanced-tabs {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.tab-btn {
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: none;
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    color: var(--text-primary);
    background: var(--background);
}

.tab-btn.active {
    color: var(--primary);
    background: rgba(227, 24, 55, 0.08);
}

/* Code Editor */
.json-editor-container,
.prompts-viewer-container {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.editor-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    background: var(--background);
    border-bottom: 1px solid var(--border);
}

.editor-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-muted);
    font-family: monospace;
}

.code-editor {
    width: 100%;
    min-height: 300px;
    padding: var(--space-md);
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.8125rem;
    line-height: 1.6;
    border: none;
    resize: vertical;
    background: var(--surface);
    color: var(--text-primary);
}

.code-editor:focus {
    outline: none;
}

.prompts-editor {
    min-height: 400px;
}

/* Generate Actions */
.generate-actions {
    text-align: center;
}

/* Progress Section */
.progress-section {
    text-align: center;
    padding: var(--space-xl) 0;
}

.progress-ring-container {
    position: relative;
    display: inline-block;
    margin-bottom: var(--space-lg);
}

.progress-ring {
    transform: rotate(-90deg);
}

.progress-ring-bg {
    fill: none;
    stroke: var(--border);
    stroke-width: 8;
}

.progress-ring-fill {
    fill: none;
    stroke: var(--primary);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 326.73;
    stroke-dashoffset: 326.73;
    transition: stroke-dashoffset 0.5s ease;
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.progress-percent {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.progress-status {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* Results Section */
.completion-info {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

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

.stat-label {
    display: block;
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-bottom: var(--space-xs);
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.notes-preview {
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    max-height: 400px;
    overflow-y: auto;
    margin-bottom: var(--space-xl);
    text-align: left;
}

.notes-preview pre {
    white-space: pre-wrap;
    word-wrap: break-word;
    font-size: 0.875rem;
    line-height: 1.6;
}

.download-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* ============================================
   About Page
   ============================================ */
.about-hero {
    padding: 140px var(--space-lg) var(--space-2xl);
    text-align: center;
    background: linear-gradient(180deg, var(--background) 0%, #F5F5FA 100%);
}

.about-hero h1 {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.about-hero .lead {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.about-content {
    padding: var(--space-2xl) 0 var(--space-3xl);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.about-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
}

.about-card.full-width {
    grid-column: 1 / -1;
}

.about-card h2 {
    font-family: var(--font-body);
    font-size: 1.25rem;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border);
}

/* Pipeline Diagram */
.pipeline-diagram {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.pipeline-step {
    text-align: center;
    flex: 1;
    min-width: 100px;
}

.pipeline-step .step-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.pipeline-step h4 {
    font-size: 0.875rem;
    margin-bottom: var(--space-xs);
}

.pipeline-step p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.pipeline-arrow {
    color: var(--text-muted);
    font-size: 1.5rem;
}

/* Model Info */
.model-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.model-item {
    padding: var(--space-md);
    background: var(--background);
    border-radius: var(--radius-md);
}

.model-item h4 {
    font-size: 1rem;
    margin-bottom: var(--space-sm);
    color: var(--primary);
}

.model-item ul {
    list-style: none;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.model-item li {
    padding: var(--space-xs) 0;
}

/* Feature List */
.feature-list {
    list-style: none;
}

.feature-list li {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--border-light);
}

.feature-list li:last-child {
    border-bottom: none;
}

.feature-list .feature-icon {
    font-size: 1.25rem;
}

.feature-list strong {
    display: block;
    margin-bottom: var(--space-xs);
}

.feature-list p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Tech Grid */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.tech-item {
    text-align: center;
    padding: var(--space-md);
    background: var(--background);
    border-radius: var(--radius-md);
}

.tech-item strong {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-xs);
}

.tech-item p {
    font-size: 0.9375rem;
    color: var(--text-primary);
    margin: 0;
}

/* Roadmap */
.roadmap {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.roadmap-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--background);
    border-radius: var(--radius-md);
}

.roadmap-item .status {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    flex-shrink: 0;
}

.roadmap-item .status.done {
    background: #DCFCE7;
    color: #166534;
}

.roadmap-item .status.progress {
    background: #FEF3C7;
    color: #92400E;
}

.roadmap-item .status.planned {
    background: var(--border);
    color: var(--text-muted);
}

.roadmap-item strong {
    display: block;
    margin-bottom: var(--space-xs);
}

.roadmap-item p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Credits Card */
.credits-card {
    text-align: center;
}

.credits-card p {
    margin-bottom: var(--space-md);
}

.credits-card .disclaimer {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-style: italic;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--secondary);
    color: white;
    padding: var(--space-2xl) 0;
}

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

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.footer p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9375rem;
    margin-bottom: var(--space-md);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
}

.footer-links a:hover {
    color: white;
}

.footer-links span {
    color: rgba(255, 255, 255, 0.4);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .about-card.full-width {
        grid-column: 1;
    }
    
    .pipeline-diagram {
        flex-direction: column;
    }
    
    .pipeline-arrow {
        transform: rotate(90deg);
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .model-options {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .download-actions {
        flex-direction: column;
    }
}

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

.step-card {
    animation: fadeIn 0.4s ease;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.progress-status.processing {
    animation: pulse 1.5s ease infinite;
}