/* YOLO9-E2E Project Page Styles (Premium Light Theme) */

/* Global Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

:root {
    --bg-color: #fafafa;
    --card-bg: #ffffff;
    --text-primary: #18181b;
    --text-secondary: #52525b;
    --text-muted: #71717a;
    --border-color: #e4e4e7;
    --accent-color: #4f46e5;
    --accent-light: #e0e7ff;
    --accent-hover: #4338ca;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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, 0.02);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-heading: 'Outfit', sans-serif;
    --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, Courier, monospace;
}

body {
    background-color: var(--bg-color);
    background-image: 
        radial-gradient(at 0% 0%, rgba(224, 231, 255, 0.3) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(244, 244, 245, 0.5) 0px, transparent 50%),
        radial-gradient(at 50% 100%, rgba(224, 231, 255, 0.2) 0px, transparent 50%);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    padding: 40px 20px;
    display: flex;
    justify-content: center;
}

/* Page Layout Container */
.project-container {
    width: 100%;
    max-width: 900px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

/* Back Link Navigation */
.back-link {
    align-self: flex-start;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s ease, transform 0.2s ease;
}

.back-link:hover {
    color: var(--accent-color);
    transform: translateX(-3px);
}

.back-link svg {
    width: 18px;
    height: 18px;
}

/* Header & Hero Section */
header.hero {
    text-align: center;
    padding: 60px 40px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

header.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, #4f46e5, #06b6d4);
}

.project-tag {
    display: inline-block;
    padding: 6px 16px;
    background-color: var(--accent-light);
    color: var(--accent-color);
    border-radius: 9999px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
}

.project-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.5px;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.project-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 24px;
    font-weight: 400;
}

/* Alternative Titles Selector */
.title-variants-box {
    margin: 20px auto 28px;
    background: #f8f9fa;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 16px 20px;
    max-width: 650px;
    text-align: left;
}

.title-variants-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.title-variants-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
    color: var(--text-muted);
}

.title-variant-btn {
    background: none;
    border: none;
    font-family: var(--font-sans);
    color: var(--accent-color);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: color 0.2s ease;
}

.title-variant-btn:hover {
    color: var(--accent-hover);
}

.title-variant-text {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    font-style: italic;
    min-height: 24px;
    transition: opacity 0.2s ease;
}

.author-list {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 1rem;
    margin-bottom: 8px;
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
}

.author-name:hover {
    color: var(--accent-color);
}

.author-name.collaborator {
    color: var(--text-secondary);
    font-weight: 500;
}

.author-affiliation {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.links-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
}

.btn-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: 9999px;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-link.primary {
    background-color: var(--text-primary);
    color: #ffffff;
    box-shadow: var(--shadow-sm);
}

.btn-link.primary:hover {
    background-color: #27272a;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-link.secondary {
    background-color: #ffffff;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.btn-link.secondary:hover {
    background-color: #f4f4f5;
    border-color: #d4d4d8;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-link svg {
    width: 18px;
    height: 18px;
}

/* Sections & Content Cards */
.content-section {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--shadow-md);
}

.section-title {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--accent-color);
    border-radius: 2px;
}

.abstract-text {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.7;
    text-align: justify;
}

/* Implementation details */
.implementation-grid {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.step-card {
    background: #f8f9fa;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    transition: border-color 0.25s ease;
}

.step-card:hover {
    border-color: var(--accent-light);
}

.step-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background-color: var(--accent-color);
    color: #ffffff;
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.85rem;
}

.step-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.step-desc {
    color: var(--text-secondary);
    font-size: 0.98rem;
    margin-bottom: 12px;
}

.step-desc ul {
    margin-left: 20px;
    margin-top: 8px;
}

.step-desc li {
    margin-bottom: 6px;
}

.step-desc strong {
    color: var(--text-primary);
}

/* Architecture Image */
.diagram-container {
    text-align: center;
    margin-top: 20px;
}

.diagram-img {
    max-width: 100%;
    height: auto;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.diagram-img:hover {
    transform: scale(1.015);
    box-shadow: var(--shadow-lg);
}

.diagram-caption {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 12px;
    font-style: italic;
}

/* Validation Results Styling */
.results-table-container {
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    margin-top: 16px;
    box-shadow: var(--shadow-sm);
}

.results-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.95rem;
}

.results-table th, 
.results-table td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-color);
}

.results-table th {
    background-color: #f8f9fa;
    color: var(--text-primary);
    font-weight: 600;
    font-family: var(--font-heading);
}

.results-table tr:last-child td {
    border-bottom: none;
}

.results-table tbody tr:hover {
    background-color: #f4f4f5;
}

.metric-value {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--accent-color);
}

.latency-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
    margin-top: 24px;
}

.latency-card {
    background: #f8f9fa;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.latency-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.latency-value {
    font-size: 1.5rem;
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--text-primary);
}

/* Code Snippet Styles */
.code-container {
    position: relative;
    margin-top: 16px;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #f1f1f4;
    border: 1px solid var(--border-color);
    border-bottom: none;
    padding: 10px 20px;
    border-top-left-radius: 16px;
    border-top-right-radius: 16px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.code-copy-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 600;
    transition: color 0.2s ease;
}

.code-copy-btn:hover {
    color: var(--accent-color);
}

pre {
    background-color: #f8f9fa;
    border: 1px solid var(--border-color);
    border-bottom-left-radius: 16px;
    border-bottom-right-radius: 16px;
    padding: 20px;
    overflow-x: auto;
    margin: 0;
}

code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: #0f172a;
}

/* Acknowledgments styling */
.acknowledgments-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: var(--accent-light);
    border: 1px solid #c7d2fe;
    border-radius: 16px;
    padding: 24px;
    color: #312e81;
}

.acknowledgments-card svg {
    width: 24px;
    height: 24px;
    color: var(--accent-color);
    flex-shrink: 0;
    margin-top: 2px;
}

.acknowledgments-text {
    font-size: 1rem;
    line-height: 1.6;
}

.acknowledgments-text a {
    color: var(--accent-color);
    font-weight: 600;
    text-decoration: none;
    border-bottom: 1.5px solid transparent;
    transition: border-color 0.2s ease;
}

.acknowledgments-text a:hover {
    border-color: var(--accent-color);
}

/* Footer Section */
footer {
    text-align: center;
    padding: 40px 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 20px;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    body {
        padding: 20px 10px;
    }
    
    header.hero {
        padding: 40px 20px;
    }

    .project-title {
        font-size: 1.8rem;
    }

    .project-subtitle {
        font-size: 1rem;
    }

    .links-container {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-link {
        justify-content: center;
    }

    .content-section {
        padding: 24px;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .latency-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}