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

:root {
    /* Tech/robotics palette - dark slate, industrial */
    --text-color: #e7ecf5;
    --text-color-light: #a5b0c4;
    --text-color-lighter: #707c93;
    --bg-color: #0c0f16;
    --bg-color-rgb: 12, 15, 22;
    --bg-subtle: #141924;
    --bg-elevated: #171d2a;
    --border-color: #2a3244;
    --border-subtle: #1c222f;

    /* Accent bars/markers - solid, clean */
    --metal-d: var(--accent);
    --metal-v: var(--accent);
    --metal-h: var(--accent);

    /* Tech accent color options - uncomment one:
    
    OPTION 1: Deep Tech Blue (current)
    --accent: #2563eb;
    --accent-light: #3b82f6;
    --accent-dark: #1e40af;
    --accent-subtle: rgba(var(--accent-rgb), 0.1);
    
    OPTION 2: Slate Blue-Gray (neutral, industrial)
    --accent: #475569;
    --accent-light: #64748b;
    --accent-dark: #334155;
    --accent-subtle: rgba(71, 85, 105, 0.1);
    
    OPTION 3: Dark Teal (tech cyan, muted)
    --accent: #0891b2;
    --accent-light: #06b6d4;
    --accent-dark: #0e7490;
    --accent-subtle: rgba(8, 145, 178, 0.1);
    
    OPTION 4: Tech Orange/Amber (warm, robotics)
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    --accent-dark: #d97706;
    --accent-subtle: rgba(245, 158, 11, 0.1);
    
    OPTION 5: Tech Green (terminal green, refined)
    --accent: #10b981;
    --accent-light: #34d399;
    --accent-dark: #059669;
    --accent-subtle: rgba(16, 185, 129, 0.1);
    
    OPTION 6: Steel Blue (professional tech)
    --accent: #4a90e2;
    --accent-light: #6ba3f5;
    --accent-dark: #357abd;
    --accent-subtle: rgba(74, 144, 226, 0.1);
    */
    
    /* Tech accent - Deep Tech Blue, brightened for a dark ground */
    --accent: #4f8bf5;
    --accent-rgb: 79, 139, 245;
    --accent-highlight-rgb: 147, 197, 253;
    --accent-light: #7db0ff;
    --accent-dark: #a9cbff;
    --accent-subtle: rgba(var(--accent-rgb), 0.16);

    /* Status colors */
    --success: #34d399;
    --success-rgb: 52, 211, 153;

    /* Decorative neutral (ambient backdrop shapes) */
    --slate-rgb: 100, 116, 139;

    /* Link colors */
    --link-color: #4f8bf5;
    --link-hover: #7db0ff;
    
    /* Typography */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing system */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 5rem;
    
    /* Layout */
    --max-width: 920px;
    --grid-gap: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.25);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.35), 0 2px 4px -1px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.45), 0 4px 6px -2px rgba(0, 0, 0, 0.35);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 15px;
    line-height: 1.75;
    color: var(--text-color);
    background-color: var(--bg-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    letter-spacing: -0.011em;
    position: relative;
    overflow-x: hidden;
    background-image:
        repeating-linear-gradient(135deg, rgba(var(--accent-rgb), 0.035) 0px, rgba(var(--accent-rgb), 0.035) 1px, transparent 1px, transparent 56px),
        repeating-linear-gradient(45deg, rgba(var(--slate-rgb), 0.03) 0px, rgba(var(--slate-rgb), 0.03) 1px, transparent 1px, transparent 56px);
    background-attachment: fixed;
}

/* Ambient geometric backdrop - angular metallic facets instead of soft blobs */
body::before,
body::after {
    content: '';
    position: fixed;
    pointer-events: none;
    z-index: -1;
}

body::before {
    top: -14%;
    right: -10%;
    width: 32rem;
    height: 32rem;
    background: conic-gradient(from 135deg, rgba(var(--accent-rgb), 0.14), rgba(var(--accent-highlight-rgb), 0.09), rgba(var(--slate-rgb), 0.07), transparent 65%);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    transform: rotate(8deg);
}

body::after {
    bottom: -16%;
    left: -12%;
    width: 26rem;
    height: 26rem;
    background: linear-gradient(135deg, rgba(var(--slate-rgb), 0.09), rgba(var(--accent-rgb), 0.06) 60%, transparent 80%);
    clip-path: polygon(30% 0%, 70% 0%, 100% 50%, 70% 100%, 30% 100%, 0% 50%);
    transform: rotate(-14deg);
}

/* Scroll progress bar */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    width: 0%;
    background: var(--metal-h);
    box-shadow: 0 0 8px rgba(var(--accent-rgb), 0.5);
    z-index: 1000;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2.5rem;
}

/* Navigation */
header {
    position: sticky;
    top: 0;
    z-index: 100;
    margin-bottom: 4rem;
    background-color: rgba(var(--bg-color-rgb), 0.8);
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    transition: all var(--transition-base);
}

header .container {
    padding-top: 1.75rem;
    padding-bottom: 1.75rem;
    border-bottom: 1px solid var(--border-subtle);
}

.nav {
    display: flex;
    justify-content: center;
}

.nav-links {
    display: flex;
    gap: 3rem;
    flex-wrap: wrap;
    justify-content: center;
}

.nav-links a {
    color: var(--text-color-light);
    text-decoration: none;
    font-size: 0.8125rem;
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.08em;
    transition: all var(--transition-base);
    position: relative;
    text-transform: uppercase;
    padding: 0.75rem 0;
}

.nav-links a:hover {
    color: var(--text-color);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--metal-h);
    transition: width var(--transition-base);
    border-radius: 1px;
    box-shadow: 0 0 8px rgba(var(--accent-rgb), 0.3);
}

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

.nav-links a.active {
    color: var(--text-color);
    font-weight: var(--font-weight-semibold);
}

/* Sections */
.section {
    margin-bottom: var(--spacing-3xl);
    scroll-margin-top: 6rem;
}

.section h2 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-2xl);
    color: var(--text-color);
    letter-spacing: -0.025em;
    position: relative;
    padding-left: 1.15rem;
}

.section h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.4em;
    width: 10px;
    height: 10px;
    background: var(--metal-d);
    border-radius: 2px;
    transform: rotate(45deg);
    box-shadow: 0 0 6px rgba(var(--accent-rgb), 0.35);
}

/* About Section */
#about {
    padding: var(--spacing-2xl) 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 220px;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
    align-items: start;
}

.about-main h1 {
    font-size: 2.5rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
    letter-spacing: -0.04em;
    line-height: 1.15;
}

.subtitle {
    font-size: 1.125rem;
    color: var(--text-color-light);
    margin-bottom: var(--spacing-xl);
    font-weight: var(--font-weight-normal);
    letter-spacing: -0.01em;
}

.description {
    font-size: 1rem;
    color: var(--text-color-light);
    line-height: 1.8;
    max-width: 100%;
}

.about-photo {
    position: relative;
    padding: 3px;
    border-radius: calc(var(--spacing-md, 12px) + 3px);
    background: var(--metal-d);
    box-shadow: var(--shadow-lg);
    transition: box-shadow var(--transition-slow);
}

.about-photo img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: var(--spacing-md, 12px);
}

.about-photo:hover {
    box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.22), var(--shadow-lg);
}

/* "Currently active" indicator */
.pulse-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    margin-left: 0.4rem;
    background: var(--success);
    border-radius: 50%;
    vertical-align: middle;
    box-shadow: 0 0 0 0 rgba(var(--success-rgb), 0.6);
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0% { box-shadow: 0 0 0 0 rgba(var(--success-rgb), 0.55); }
    70% { box-shadow: 0 0 0 6px rgba(var(--success-rgb), 0); }
    100% { box-shadow: 0 0 0 0 rgba(var(--success-rgb), 0); }
}

/* Scroll-reveal */
.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.about-meta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-subtle);
    border-radius: 8px;
    border: 1px solid var(--border-subtle);
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

.meta-label {
    font-size: 0.6875rem;
    color: var(--text-color-lighter);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: var(--font-weight-semibold);
}

.meta-value {
    font-size: 0.875rem;
    color: var(--text-color);
    font-weight: var(--font-weight-medium);
    letter-spacing: -0.01em;
}

/* Links */
.links {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: flex-start;
    margin-top: var(--spacing-xl);
}

.link-icon {
    color: var(--accent);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-base);
    padding: 0.75rem;
    border: 1.5px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-color);
    letter-spacing: -0.01em;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
}

.link-icon svg {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-base);
}

.link-icon::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--accent-subtle);
    transition: left var(--transition-base);
    z-index: -1;
}

.link-icon:hover {
    color: white;
    border-color: var(--accent);
    background: var(--metal-d);
    box-shadow: 0 0 0 1px rgba(var(--accent-rgb), 0.15);
}

.link-icon:hover::before {
    left: 0;
}

.link-icon:hover svg {
    transform: scale(1.1);
}

/* News Section */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.news-item {
    position: relative;
    display: grid;
    grid-template-columns: 110px 1fr;
    gap: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--border-subtle);
    align-items: start;
    transition: background-color var(--transition-slow), border-color var(--transition-base);
    border-radius: 4px;
    margin: 0 calc(-1 * var(--spacing-md));
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

.news-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10%;
    width: 3px;
    height: 0%;
    background: var(--metal-v);
    border-radius: 3px;
    transition: height var(--transition-slow);
}

.news-item:hover {
    background-color: var(--bg-subtle);
}

.news-item:hover::before {
    height: 80%;
}

.news-item:last-child {
    border-bottom: none;
}

.news-date {
    font-size: 0.8125rem;
    color: var(--text-color-lighter);
    font-weight: var(--font-weight-semibold);
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.02em;
}

.news-content {
    font-size: 0.9375rem;
    color: var(--text-color-light);
    line-height: 1.7;
    letter-spacing: -0.01em;
}

/* Timeline */
.timeline {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.timeline-item {
    position: relative;
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: var(--spacing-2xl);
    align-items: start;
    padding: var(--spacing-xl) 0;
    border-bottom: 1px solid var(--border-subtle);
    transition: background-color var(--transition-slow), border-color var(--transition-base);
    border-radius: 4px;
    margin: 0 calc(-1 * var(--spacing-md));
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10%;
    width: 3px;
    height: 0%;
    background: var(--metal-v);
    border-radius: 3px;
    transition: height var(--transition-slow);
}

.timeline-item:hover {
    background-color: var(--bg-subtle);
    border-color: rgba(var(--accent-rgb), 0.2);
}

.timeline-item:hover::before {
    height: 80%;
}

.timeline-item:last-child {
    border-bottom: none;
}

.timeline-year {
    font-size: 0.8125rem;
    color: var(--text-color-lighter);
    font-weight: var(--font-weight-semibold);
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
    padding-top: 0.125rem;
    letter-spacing: 0.02em;
}

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

.job-icon {
    width: 40px;
    height: 40px;
    object-fit: contain;
    flex-shrink: 0;
    border-radius: 4px;
    background-color: #ffffff;
    padding: 4px;
    box-sizing: border-box;
    transition: transform var(--transition-base);
}

.timeline-item:hover .job-icon {
    transform: scale(1.08);
}

.timeline-content h3 {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-xs);
    color: var(--text-color);
    letter-spacing: -0.015em;
    line-height: 1.4;
}

.institution {
    color: var(--text-color-light);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-xs);
    font-weight: var(--font-weight-medium);
    letter-spacing: -0.01em;
}

.location {
    color: var(--text-color-lighter);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
    font-style: italic;
}

.advisor {
    color: var(--text-color-lighter);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

.advisor a {
    color: var(--accent);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
    border-bottom: 1px solid transparent;
}

.advisor a:hover {
    border-bottom-color: var(--accent);
}

.timeline-content .description {
    color: var(--text-color-light);
    font-size: 0.9375rem;
    margin-top: var(--spacing-sm);
    line-height: 1.75;
    letter-spacing: -0.01em;
}

.timeline-content .description ul {
    list-style: none !important;
    padding-left: 0 !important;
    margin-top: var(--spacing-sm);
    margin-left: 0;
}

.timeline-content .description li {
    margin-bottom: var(--spacing-sm);
    padding-left: 1.5rem;
    position: relative;
    list-style: none !important;
    list-style-type: none !important;
}

.timeline-content .description li::before {
    content: '•';
    position: absolute;
    left: 0.5rem;
    color: var(--accent);
    font-weight: var(--font-weight-bold);
}

.timeline-content .description li::marker {
    display: none !important;
    content: none !important;
}

.timeline-content .description em {
    font-style: italic;
    color: var(--text-color);
}

/* Publications/Projects */
.publications {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.publication {
    position: relative;
    padding: var(--spacing-2xl) 0;
    border-bottom: 1px solid var(--border-subtle);
    transition: background-color var(--transition-slow), border-color var(--transition-base);
    border-radius: 8px;
    margin: 0 calc(-1 * var(--spacing-lg));
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
}

.publication::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--metal-h);
    border-radius: 2px;
    transition: width var(--transition-slow);
}

.publication:hover {
    background-color: var(--bg-subtle);
    border-color: rgba(var(--accent-rgb), 0.18);
}

.publication:hover::before {
    width: 100%;
}

.publication:last-child {
    border-bottom: none;
}

#publications .publication {
    margin: 0;
    padding: var(--spacing-2xl) var(--spacing-xl);
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

#publications .publication:hover {
    border-color: rgba(var(--accent-rgb), 0.28);
    box-shadow: var(--shadow-lg);
}

#publications .publication::before {
    display: none;
}

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

.pub-header h3 {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-color);
    letter-spacing: -0.02em;
    line-height: 1.4;
    flex: 1;
}

.pub-header h3 a {
    color: inherit;
    text-decoration: none;
    background-image: linear-gradient(var(--accent), var(--accent));
    background-size: 0% 1px;
    background-repeat: no-repeat;
    background-position: 0 100%;
    transition: background-size var(--transition-base), color var(--transition-base);
}

.pub-header h3 a:hover {
    color: var(--accent);
    background-size: 100% 1px;
}

.pub-image {
    margin: var(--spacing-md) 0;
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid var(--border-subtle);
}

.pub-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* Coming soon placeholder (project in development, no imagery yet) */
.coming-soon-visual {
    position: relative;
    margin: var(--spacing-md) 0;
    padding: var(--spacing-3xl) var(--spacing-lg);
    border-radius: 8px;
    overflow: hidden;
    border: 1px dashed var(--border-color);
    background: linear-gradient(160deg, var(--bg-subtle), var(--bg-elevated));
}

.coming-soon-grid {
    position: absolute;
    inset: -20%;
    background-image:
        repeating-linear-gradient(0deg, rgba(var(--accent-rgb), 0.09) 0px, rgba(var(--accent-rgb), 0.09) 1px, transparent 1px, transparent 34px),
        repeating-linear-gradient(90deg, rgba(var(--accent-rgb), 0.09) 0px, rgba(var(--accent-rgb), 0.09) 1px, transparent 1px, transparent 34px);
    animation: coming-soon-pan 9s linear infinite;
}

@keyframes coming-soon-pan {
    0% { transform: translate(0, 0); }
    100% { transform: translate(34px, 34px); }
}

.coming-soon-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    text-align: center;
}

.coming-soon-icon {
    color: var(--accent);
    opacity: 0.85;
    animation: coming-soon-float 3s ease-in-out infinite;
}

@keyframes coming-soon-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

.coming-soon-text {
    font-size: 1.0625rem;
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--text-color);
}

.coming-soon-progress {
    width: 140px;
    height: 4px;
    margin-top: var(--spacing-xs);
    border-radius: 3px;
    background-color: var(--border-subtle);
    overflow: hidden;
}

.coming-soon-progress-bar {
    width: 40%;
    height: 100%;
    border-radius: 3px;
    background: var(--metal-h);
    box-shadow: 0 0 8px rgba(var(--accent-rgb), 0.5);
    animation: coming-soon-load 1.8s ease-in-out infinite;
}

@keyframes coming-soon-load {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(350%); }
}

@media (prefers-reduced-motion: reduce) {
    .coming-soon-grid,
    .coming-soon-icon,
    .coming-soon-progress-bar {
        animation: none;
    }
}

.pub-pdf {
    margin: var(--spacing-lg) 0;
    width: 100%;
    padding: var(--spacing-sm);
    background-color: #eef1f6;
    border: 1px solid var(--border-color);
    border-radius: 10px;
}

.pub-pdf object {
    width: 100%;
    height: 600px;
    border-radius: 5px;
    background-color: #ffffff;
    display: block;
}

.pub-badges {
    display: flex;
    gap: var(--spacing-xs);
    flex-shrink: 0;
    align-items: center;
}

.badge {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
    font-weight: var(--font-weight-semibold);
    border-radius: 6px;
    background-color: var(--bg-subtle);
    color: var(--text-color-light);
    border: 1px solid var(--border-color);
    letter-spacing: 0.02em;
    transition: all var(--transition-fast);
}

.badge-primary {
    background-color: var(--accent-subtle);
    color: var(--accent-dark);
    border-color: rgba(var(--accent-rgb), 0.18);
    font-weight: var(--font-weight-semibold);
}

.pub-abstract {
    color: var(--text-color-light);
    font-size: 0.9375rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.01em;
}

.pub-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.pub-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.tag {
    display: inline-block;
    padding: 0.3125rem 0.625rem;
    font-size: 0.75rem;
    font-weight: var(--font-weight-normal);
    color: var(--text-color-lighter);
    background-color: var(--bg-subtle);
    border: 1px solid var(--border-subtle);
    border-radius: 5px;
    transition: all var(--transition-fast);
}

.tag:hover {
    background-color: var(--accent-subtle);
    border-color: var(--accent);
    color: var(--accent-dark);
}

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

.link-note {
    font-size: 0.75rem;
    color: var(--text-color-lighter);
    font-style: italic;
}

.link-btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--accent);
    text-decoration: none;
    border: 1.5px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-color);
    transition: all var(--transition-base);
    letter-spacing: 0.01em;
    position: relative;
    overflow: hidden;
}

.link-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--accent-subtle);
    transition: left var(--transition-base);
    z-index: -1;
}

.link-btn:hover {
    color: white;
    border-color: var(--accent);
    background: var(--metal-d);
    box-shadow: 0 0 0 1px rgba(var(--accent-rgb), 0.15);
}

.link-btn:hover::before {
    left: 0;
}

.link-btn[data-type="code"] {
    border-color: var(--accent);
    color: var(--accent);
    background-color: var(--accent-subtle);
    box-shadow: 0 0 0 1px rgba(var(--accent-rgb), 0.1);
}

.link-btn[data-type="code"]:hover {
    background: var(--metal-d);
    color: white;
    border-color: var(--accent);
    box-shadow: 0 4px 12px rgba(var(--accent-rgb), 0.35);
}

.link-btn[data-type="code"]::before {
    background: var(--accent);
}

/* Contact Section */
#contact {
    padding: var(--spacing-2xl) 0;
}

#contact .content {
    max-width: 100%;
}

#contact .content p {
    color: var(--text-color-light);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
    letter-spacing: -0.01em;
}

/* Footer */
footer {
    text-align: center;
    padding: var(--spacing-3xl) 0 var(--spacing-2xl);
    margin-top: var(--spacing-3xl);
    border-top: 1px solid var(--border-subtle);
    color: var(--text-color-lighter);
    font-size: 0.8125rem;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.02em;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }

    header {
        margin-bottom: 3rem;
    }

    header .container {
        padding-top: 2rem;
        padding-bottom: 1.25rem;
    }

    .nav-links {
        gap: 2rem;
        font-size: 0.7rem;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .about-main h1 {
        font-size: 2rem;
    }

    .about-meta {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .timeline-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
        margin: 0 calc(-1 * var(--spacing-sm));
        padding-left: var(--spacing-sm);
        padding-right: var(--spacing-sm);
    }

    .timeline-year {
        font-size: 0.75rem;
        margin-bottom: 0.375rem;
    }

    .section {
        margin-bottom: var(--spacing-2xl);
    }

    .links {
        gap: var(--spacing-sm);
    }

    .news-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
        margin: 0 calc(-1 * var(--spacing-sm));
        padding-left: var(--spacing-sm);
        padding-right: var(--spacing-sm);
    }

    .news-date {
        margin-bottom: 0.375rem;
    }

    .pub-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .pub-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

    .publication {
        margin: 0 calc(-1 * var(--spacing-sm));
        padding-left: var(--spacing-sm);
        padding-right: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .about-main h1 {
        font-size: 1.75rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .section h2 {
        font-size: 1.375rem;
    }

    .pub-header h3 {
        font-size: 1.125rem;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Focus states for accessibility */
a:focus-visible,
.link-btn:focus-visible,
.link-icon:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 4px;
}

/* Selection */
::selection {
    background-color: var(--accent-subtle);
    color: var(--text-color);
}

/* Respect reduced-motion preference */
@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .pulse-dot {
        animation: none;
    }

    .timeline-item::before,
    .publication::before,
    .news-item::before {
        transition: none;
    }

    * {
        scroll-behavior: auto !important;
    }
}