/* =====================================
   TS-RaMIA Main Stylesheet
   ===================================== */

/* CSS Variables */
:root {
    /* Colors */
    --primary: #0173B2;
    --secondary: #DE8F05;
    --success: #029E73;
    --background: #F8F9FA;
    --background-dark: #E9ECEF;
    --text-dark: #212529;
    --text-light: #6C757D;
    --text-muted: #ADB5BD;
    --border-color: #DEE2E6;
    --shadow: rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 600ms ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    color: var(--text-dark);
    background-color: var(--background);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-sm);
}

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

a:hover {
    color: var(--secondary);
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px var(--shadow);
    z-index: 1000;
    transition: transform var(--transition-normal);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-link {
    color: var(--text-dark);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

/* Hero Section */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    overflow: hidden;
}

#particles-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: var(--spacing-lg);
}

.hero-title {
    font-size: 5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.8rem;
    font-weight: 400;
    margin-bottom: var(--spacing-md);
    opacity: 0.95;
}

.hero-description {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-lg);
}

.hero-badges {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.badge {
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    font-weight: 500;
    font-size: 0.9rem;
}

.hero-cta {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: white;
    color: var(--primary);
    font-weight: 600;
    font-size: 1.1rem;
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.hero-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(0, 0, 0, 0.3);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    opacity: 0.8;
}

.mouse {
    width: 30px;
    height: 50px;
    border: 2px solid white;
    border-radius: 15px;
    margin: 0 auto var(--spacing-xs);
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: white;
    border-radius: 2px;
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll-wheel 2s infinite;
}

@keyframes scroll-wheel {
    0%, 100% { opacity: 0; top: 10px; }
    50% { opacity: 1; top: 20px; }
}

/* Section Base Styles */
section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
}

/* Motivation Section */
.motivation-section {
    background: white;
}

.motivation-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.motivation-text {
    padding-right: var(--spacing-md);
}

.lead {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.feature-list {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.feature-list li {
    padding: var(--spacing-xs) 0;
    font-size: 1.1rem;
}

.stats-box {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.stat {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--background);
    border-radius: var(--radius-lg);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--success);
}

.stat-label {
    color: var(--text-light);
    font-size: 0.9rem;
}

.motivation-demo {
    background: var(--background);
    padding: var(--spacing-md);
    border-radius: var(--radius-xl);
}

.demo-instruction {
    text-align: center;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    font-size: 0.9rem;
}

.sample-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.sample-card {
    background: white;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.sample-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px var(--shadow);
}

.sample-card[data-label="member"] {
    border-color: var(--success);
}

.sample-card[data-label="member"]:hover {
    background: rgba(2, 158, 115, 0.1);
    border-width: 3px;
}

.sample-card[data-label="non-member"] {
    border-color: var(--text-muted);
}

.sample-card[data-label="non-member"]:hover {
    background: var(--background);
    border-width: 3px;
}

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

.card-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.card-title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.card-status {
    font-size: 0.85rem;
    color: var(--text-light);
}

.sample-card[data-label="member"] .card-status {
    color: var(--success);
    font-weight: 600;
}

/* Method Section */
.method-section {
    background: var(--background);
}

.method-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.method-step {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-md);
    align-items: start;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: 0 4px 15px var(--shadow);
}

.step-visualization {
    margin-top: var(--spacing-md);
    background: var(--background);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
}

.abc-container {
    font-family: var(--font-mono);
    font-size: 1.2rem;
}

.abc-line {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.token {
    padding: 4px 8px;
    background: var(--background-dark);
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
}

.token.structure {
    background: var(--secondary);
    color: white;
    font-weight: 600;
}

.token.note {
    background: #E8E8E8;
}

.legend {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    font-size: 0.9rem;
}

.legend-box {
    display: inline-block;
    width: 20px;
    height: 20px;
    border-radius: var(--radius-sm);
    margin-right: var(--spacing-xs);
}

.legend-box.structure {
    background: var(--secondary);
}

.legend-box.note {
    background: #E8E8E8;
}

.chart-note {
    text-align: center;
    color: var(--text-light);
    font-size: 0.9rem;
    margin-top: var(--spacing-sm);
}

.fusion-formula {
    text-align: center;
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    background: white;
    border-radius: var(--radius-md);
}

.fusion-formula code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--primary);
}

/* Demo Section */
.demo-section {
    background: white;
}

.demo-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
}

.demo-controls {
    background: var(--background);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    height: fit-content;
    position: sticky;
    top: 100px;
}

.sample-selector {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
}

.sample-info {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: white;
    border-radius: var(--radius-md);
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--border-color);
}

.info-label {
    font-weight: 600;
    color: var(--text-light);
}

.info-value {
    color: var(--text-dark);
}

.abc-preview {
    margin-top: var(--spacing-md);
}

.abc-preview pre {
    background: var(--background);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    overflow-x: auto;
}

.btn-primary {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    margin-top: var(--spacing-md);
}

.btn-primary:hover:not(:disabled) {
    background: var(--secondary);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px var(--shadow);
}

.btn-primary:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
}

.demo-visualization {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.viz-section {
    background: var(--background);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
}

.attack-progress {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.progress-step {
    text-align: center;
    padding: var(--spacing-sm);
    background: white;
    border-radius: var(--radius-md);
    opacity: 0.5;
    transition: all var(--transition-normal);
}

.progress-step.active {
    opacity: 1;
    background: var(--primary);
    color: white;
    transform: scale(1.05);
}

.progress-step .step-icon {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.progress-step .step-name {
    font-size: 0.85rem;
    font-weight: 500;
}

.result-display {
    min-height: 200px;
    background: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.result-placeholder {
    text-align: center;
    color: var(--text-light);
}

/* Results Section */
.results-section {
    background: var(--background);
}

.metrics-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.metric-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    box-shadow: 0 4px 15px var(--shadow);
    transition: all var(--transition-normal);
}

.metric-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px var(--shadow);
}

.metric-card[data-method="baseline"] {
    border-top: 4px solid var(--primary);
}

.metric-card[data-method="structtail64"] {
    border-top: 4px solid var(--secondary);
}

.metric-card[data-method="fusion"] {
    border-top: 4px solid var(--success);
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

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

.metric-main {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.metric-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary);
}

.metric-label {
    font-size: 0.9rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.metric-details {
    display: flex;
    justify-content: space-around;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

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

.detail-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-xs);
}

.detail-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--success);
}

.roc-container {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
}

.roc-controls {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    align-items: center;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
}

.btn-secondary {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--background);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

/* Resources Section */
.resources-section {
    background: white;
}

.resources-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.resource-block {
    background: var(--background);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
}

.application-cards {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.app-card {
    background: white;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    display: flex;
    gap: var(--spacing-md);
    align-items: start;
}

.app-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.resource-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.resource-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: white;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.resource-link:hover {
    transform: translateX(4px);
    box-shadow: 0 4px 15px var(--shadow);
}

.link-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.link-title {
    font-weight: 600;
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.link-description {
    font-size: 0.9rem;
    color: var(--text-light);
}

.citation-box {
    background: white;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
}

.citation-box pre {
    background: var(--background);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    overflow-x: auto;
    margin: var(--spacing-sm) 0;
}

.btn-copy {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-copy:hover {
    background: var(--secondary);
}

.team-section {
    text-align: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 2px solid var(--border-color);
}

.team-contact a {
    display: inline-block;
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--primary);
    color: white;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.team-contact a:hover {
    background: var(--secondary);
    transform: translateY(-2px);
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.footer p {
    margin-bottom: var(--spacing-xs);
    opacity: 0.8;
}