/* === DESIGN TOKENS === */
:root {
    /* Colors — Dark Topographic Teal Palette */
    --color-primary: #38b2a3;
    --color-primary-dark: #2d9486;
    --color-primary-light: rgba(56, 178, 163, 0.12);
    --color-primary-ring: rgba(56, 178, 163, 0.35);
    --color-primary-ring-active: rgba(45, 148, 134, 0.5);
    --color-accent: #4dd9c8;

    --color-text: #e4ebe9;
    --color-text-secondary: #b0c4bc;
    --color-text-muted: #7a9590;

    --color-bg: #0c1416;
    --color-surface: rgba(18, 30, 33, 0.85);
    --color-surface-alt: rgba(22, 38, 42, 0.8);
    --color-border: rgba(56, 178, 163, 0.15);
    --color-context-bg: rgba(56, 178, 163, 0.08);

    --color-status-completed-bg: rgba(56, 178, 163, 0.15);
    --color-status-completed-text: #4dd9c8;
    --color-status-wip-bg: rgba(245, 158, 66, 0.15);
    --color-status-wip-text: #f5a742;
    --color-status-planned-bg: rgba(56, 178, 163, 0.1);
    --color-status-planned-text: var(--color-primary);

    /* Hero (dark) */
    --color-hero-bg: #070d0f;
    --color-hero-bg-end: #0e1e20;
    --color-hero-text: #e4ebe9;
    --color-hero-subtitle: var(--color-accent);
    --color-hero-muted: #7a9590;

    /* Glow */
    --shadow-glow: 0 4px 24px rgba(56, 178, 163, 0.3);

    /* Typography */
    --font-display: 'DM Serif Display', Georgia, 'Times New Roman', serif;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --line-height: 1.6;

    /* Spacing */
    --spacing-xs: 5px;
    --spacing-sm: 10px;
    --spacing-md: 20px;
    --spacing-lg: 30px;
    --spacing-xl: 40px;

    /* Radii */
    --radius-sm: 8px;
    --radius-md: 10px;
    --radius-lg: 15px;
    --radius-pill: 20px;
    --radius-tag: 12px;

    /* Shadows */
    --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.4);

    /* Transitions */
    --transition-base: all 0.3s ease;
    --transition-skill: width 0.8s ease;
}

/* === TERRAIN BACKGROUND === */
.terrain-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    opacity: 0.35;
}

.contour-layer path {
    fill: none;
    stroke: var(--color-primary);
    stroke-linecap: round;
}

.contour-layer--1 path {
    stroke-width: 1.2;
    opacity: 0.5;
}

.contour-layer--2 path {
    stroke-width: 0.8;
    opacity: 0.7;
}

.contour-layer--3 path {
    stroke-width: 0.6;
    opacity: 0.9;
}

.connection-lines line {
    stroke: var(--color-accent);
    stroke-width: 0.6;
    opacity: 0.4;
    stroke-dasharray: 4 6;
}

.terrain-nodes circle {
    fill: var(--color-primary);
    opacity: 0.8;
}

.terrain-nodes-pulse circle {
    fill: var(--color-accent);
}

.pulse-node {
    animation: pulse 3s ease-in-out infinite;
}

.pulse-node--2 {
    animation-delay: -1s;
}

.pulse-node--3 {
    animation-delay: -2s;
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.3;
        r: 2.5;
    }
    50% {
        opacity: 1;
        r: 4.5;
    }
}

@media (prefers-reduced-motion: reduce) {
    .pulse-node {
        animation: none;
        opacity: 0.6;
    }
}

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

body {
    font-family: var(--font-family);
    line-height: var(--line-height);
    color: var(--color-text);
    background: var(--color-bg);
    min-height: 100vh;
}

/* === LAYOUT === */
.container {
    max-width: 80%;
    margin: 0 auto;
    padding: var(--spacing-md);
}

/* === HERO SECTION === */
.hero {
    text-align: center;
    position: relative;
    overflow: hidden;
    width: 100vw;
    margin-bottom: var(--spacing-lg);
}

.hero-image-wrapper {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    display: block;
    opacity: 0.55;
}

/* Fade-out gradient at the bottom of the header image */
.hero-image-wrapper::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60%;
    background: linear-gradient(to bottom, transparent 0%, var(--color-bg) 100%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    padding: 120px var(--spacing-md) 80px;
}

.hero::before {
    display: none;
}

.hero h1 {
    font-family: var(--font-display);
    font-size: 3.4rem;
    margin-bottom: var(--spacing-sm);
    color: #ffffff;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.7), 0 1px 3px rgba(0, 0, 0, 0.9);
    position: relative;
}

.hero .subtitle {
    font-size: 1.3rem;
    color: var(--color-hero-subtitle);
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
    letter-spacing: 1px;
    position: relative;
    text-shadow: 0 1px 8px rgba(0, 0, 0, 0.7), 0 1px 2px rgba(0, 0, 0, 0.9);
}

.hero .intro {
    max-width: 600px;
    margin: 0 auto;
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    position: relative;
    text-shadow: 0 1px 6px rgba(0, 0, 0, 0.7);
}

/* === ABOUT SECTION === */
.about-section {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--color-border);
}

.about-section h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    font-weight: 400;
}

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

.about-content p {
    color: var(--color-text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
}

/* === MAIN CONTENT === */
.main-content {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.main-content .blog-section {
    max-width: 600px;
    width: 100%;
}

/* === SKILLS OVERVIEW === */
.skills-overview {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--color-border);
}

.skills-overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.skills-overview-category {
    background: var(--color-surface-alt);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
}

.skills-overview-category h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    font-weight: 400;
    letter-spacing: 0.3px;
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

/* === CARD BASE === */
.card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-border);
}

.card h2 {
    color: var(--color-text);
    margin-bottom: 25px;
    font-size: 1.6rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* === SKILLS EVOLUTION — TIMELINE === */
.skills-evolution {
    grid-column: 1 / -1;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    min-height: 1100px;
    box-shadow: var(--shadow-card);
}

h2 {
    font-family: var(--font-display);
    font-weight: 400;
    letter-spacing: 0.3px;
}

.evolution-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.evolution-timeline {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.timeline-nav {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: relative;
    padding: var(--spacing-md) 0;
    height: 720px;
}

.timeline-nav::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 80px;
    margin-bottom: 80px;
    height: 100%;
    width: 3px;
    background: linear-gradient(to bottom, var(--color-border), var(--color-primary), var(--color-border));
    border-radius: 2px;
    z-index: 0;
    pointer-events: none;
}

.timeline-period {
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 70px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-base);
    border: 2px solid transparent;
    text-align: left;
    position: relative;
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    z-index: 1;
}

.timeline-period::before {
    content: '';
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    background: var(--color-primary);
    border: 3px solid var(--color-bg);
    border-radius: 50%;
    z-index: 10;
    transition: var(--transition-base);
    box-shadow: 0 0 0 3px var(--color-primary-ring);
}

.timeline-period.active::before {
    background: var(--color-primary-dark);
    transform: translateY(-50%) scale(1.3);
    box-shadow: 0 0 0 4px var(--color-primary-ring-active);
    z-index: 15;
    left: 14px;
}

.timeline-period.active {
    background: var(--color-primary);
    color: var(--color-surface);
    border-color: var(--color-primary);
    transform: translateX(5px);
    z-index: 2;
}

.timeline-period:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.timeline-period.active:hover {
    background: var(--color-primary-dark);
}

.period-title {
    font-weight: 700;
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.timeline-period.active .period-title {
    color: var(--color-surface);
}

.period-years {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-primary);
    background: var(--color-primary-light);
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    display: inline-block;
    margin-top: var(--spacing-xs);
    border: 1px solid var(--color-primary-ring);
}

.timeline-period.active .period-years {
    color: var(--color-surface);
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
}

.period-institution {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
    font-style: italic;
}

.timeline-period.active .period-institution {
    color: rgba(255, 255, 255, 0.9);
}

/* === SKILLS DISPLAY === */
.skills-display {
    background: var(--color-surface-alt);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    min-height: 400px;
}

.period-content {
    display: none;
}

.period-content.active {
    display: block;
}

.period-context {
    background: var(--color-context-bg);
    border-left: 4px solid var(--color-primary);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.context-title {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.context-description {
    color: var(--color-text-secondary);
    line-height: var(--line-height);
}

.skills-learned {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.skill-category {
    background: var(--color-surface);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
}

.skill-category h4 {
    color: var(--color-primary);
    margin-bottom: 15px;
    font-weight: 600;
}

.skill-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.skill-level {
    width: 80px;
    height: 6px;
    background: var(--color-border);
    border-radius: 3px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--color-primary);
    border-radius: 3px;
    transition: var(--transition-skill);
}

.skill-name {
    font-weight: 500;
    color: var(--color-text);
    flex: 1;
}

/* === KEY PROJECTS (within timeline) === */
.key-projects {
    margin-top: var(--spacing-lg);
}

.key-projects h4 {
    color: var(--color-text);
    margin-bottom: 15px;
    font-weight: 600;
}

.project-list {
    display: grid;
    gap: 15px;
}

.project-item {
    background: var(--color-surface);
    border-radius: var(--radius-sm);
    padding: 15px;
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: var(--transition-base);
}

.project-item:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.project-name {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.project-description {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.project-skills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.project-skill-tag {
    background: var(--color-context-bg);
    color: var(--color-primary);
    padding: 3px 8px;
    border-radius: var(--radius-tag);
    font-size: 0.8rem;
    font-weight: 500;
}

/* === CAREER TIMELINE (simple) === */
.career-timeline {
    position: relative;
    padding: var(--spacing-md) 0;
}

.timeline-line {
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-lg);
    padding-left: 50px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 14px;
    top: 10px;
    width: 12px;
    height: 12px;
    background: var(--color-primary);
    border-radius: 50%;
    border: 3px solid var(--color-surface);
}

.timeline-date {
    color: var(--color-primary);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.timeline-title {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 3px;
}

.timeline-company {
    color: var(--color-text-secondary);
    font-style: italic;
    margin-bottom: var(--spacing-sm);
}

.timeline-desc {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* === FEATURED PROJECTS SECTION === */
.projects-section {
    grid-column: 1 / -1;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-card);
}

/* === CAROUSEL === */
.carousel-container {
    display: flex;
    align-items: stretch;
    gap: 12px;
    margin-top: var(--spacing-lg);
    position: relative;
}

.carousel-viewport {
    flex: 1;
    overflow-x: clip;
    overflow-y: visible;
    border-radius: var(--radius-md);
    padding: 8px 0;
}

.carousel-track {
    display: flex;
    transition: transform 0.4s ease;
}

.carousel-slide {
    flex: 0 0 100%;
    min-width: 0;
    padding: 0 4px;
    box-sizing: border-box;
}

.carousel-slide .project-card {
    height: 100%;
}

.carousel-btn {
    flex-shrink: 0;
    width: 44px;
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: 1.6rem;
    cursor: pointer;
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-btn:hover {
    background: var(--color-primary);
    color: var(--color-surface);
    border-color: var(--color-primary);
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: var(--spacing-sm);
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: var(--color-surface-alt);
    cursor: pointer;
    transition: var(--transition-base);
    padding: 0;
}

.carousel-dot.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

@media (min-width: 768px) {
    .carousel-slide {
        flex: 0 0 50%;
    }
}

@media (min-width: 1100px) {
    .carousel-slide {
        flex: 0 0 33.333%;
    }
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-top: var(--spacing-lg);
}

.project-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.project-card-logo {
    width: 72px;
    height: 72px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    border: 1px solid var(--color-border);
}

.project-card-logo-wrap {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.project-card-logo-wrap > div {
    flex: 1;
    min-width: 0;
}

.project-card {
    background: var(--color-surface-alt);
    border-radius: var(--radius-md);
    padding: 25px;
    border: 1px solid var(--color-border);
    transition: var(--transition-base);
}

.project-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
    border-color: var(--color-primary);
}

.project-status {
    display: inline-block;
    padding: 4px 12px;
    border-radius: var(--radius-lg);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.status-completed {
    background: var(--color-status-completed-bg);
    color: var(--color-status-completed-text);
}

.status-wip {
    background: var(--color-status-wip-bg);
    color: var(--color-status-wip-text);
}

.status-planned {
    background: var(--color-status-planned-bg);
    color: var(--color-status-planned-text);
}

.project-card h3 {
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.project-card p {
    color: var(--color-text-secondary);
    margin-bottom: 15px;
    line-height: 1.5;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tech-tag {
    background: var(--color-accent);
    color: var(--color-surface);
    padding: 4px 10px;
    border-radius: var(--radius-tag);
    font-size: 0.8rem;
    font-weight: 500;
}

/* === BLOG CARDS === */
.blog-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.blog-card {
    background: var(--color-surface-alt);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    overflow: hidden;
    transition: var(--transition-base);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.blog-card-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
    border-bottom: 1px solid var(--color-border);
}

.blog-card-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.blog-card-meta {
    color: var(--color-primary);
    font-size: 0.8rem;
    font-family: 'Inter', sans-serif;
    margin-bottom: 8px;
}

.blog-card-title {
    color: var(--color-text);
    font-family: 'DM Serif Display', serif;
    font-size: 1.15rem;
    line-height: 1.3;
    margin-bottom: 10px;
}

.blog-card-excerpt {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    flex: 1;
    margin-bottom: 16px;
}

.blog-card-read-more {
    color: var(--color-accent);
    font-size: 0.85rem;
    font-weight: 500;
}

/* === BLOG SECTION === */
.blog-section {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-card);
}

.app-embed {
    margin: 40px 0 20px;
}

.app-embed-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}

.app-embed-header h2 {
    margin: 0;
    color: #e2e8f0;
}

.app-embed-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 16px;
    border-radius: 6px;
    background: rgba(56, 178, 163, 0.12);
    border: 1px solid rgba(56, 178, 163, 0.3);
    color: var(--color-accent, #4dd9c8);
    text-decoration: none;
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.app-embed-link:hover {
    background: rgba(56, 178, 163, 0.25);
    border-color: rgba(56, 178, 163, 0.5);
}

.app-iframe-wrap {
    position: relative;
    width: 100%;
    padding-top: 62%;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--color-border);
    background: #0c1416;
}

.app-iframe-wrap iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.blog-post {
    background: var(--color-surface-alt);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    margin-bottom: 15px;
    border-left: 4px solid var(--color-primary);
    cursor: pointer;
    transition: var(--transition-base);
}


.blog-date {
    color: var(--color-primary);
    font-size: 0.9rem;
    font-weight: 600;
}

.blog-title {
    color: var(--color-text);
    font-weight: 600;
    margin: 8px 0;
}

.blog-excerpt {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* === CONTACT SECTION === */
.contact-section {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    box-shadow: var(--shadow-card);
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.contact-link:hover {
    color: var(--color-primary-dark);
    text-shadow: 0 0 12px var(--color-primary-ring);
}

/* === SCROLL REVEAL === */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children within a grid */
.reveal-children > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal-children.revealed > * {
    opacity: 1;
    transform: translateY(0);
}

.reveal-children.revealed > *:nth-child(1) { transition-delay: 0s; }
.reveal-children.revealed > *:nth-child(2) { transition-delay: 0.1s; }
.reveal-children.revealed > *:nth-child(3) { transition-delay: 0.2s; }
.reveal-children.revealed > *:nth-child(4) { transition-delay: 0.3s; }

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

/* === RESPONSIVE — TABLET === */
@media (max-width: 1024px) {
    .skills-overview-grid {
        grid-template-columns: 1fr 1fr;
    }

    .evolution-timeline {
        grid-template-columns: 1fr;
    }

    .timeline-nav {
        flex-direction: row;
        overflow-x: auto;
        gap: 15px;
        padding: var(--spacing-md) 0;
        height: auto;
    }

    .timeline-nav::before {
        left: 20px;
        right: 20px;
        top: 50%;
        bottom: auto;
        height: 2px;
        width: auto;
        background: linear-gradient(to right, var(--color-border), var(--color-primary), var(--color-border));
    }

    .timeline-period {
        padding: 15px var(--spacing-md);
        text-align: center;
        min-width: 180px;
        margin-bottom: 0;
        flex-shrink: 0;
    }

    .timeline-period::before {
        left: 50%;
        top: -10px;
        transform: translateX(-50%);
    }

    .timeline-period.active::before {
        transform: translateX(-50%) scale(1.2);
    }

    .timeline-period:hover,
    .timeline-period.active:hover {
        transform: translateY(-5px);
    }

    .timeline-period.active {
        transform: translateY(-8px);
    }
}

/* === RESPONSIVE — MOBILE === */
@media (max-width: 768px) {
    .container {
        max-width: 95%;
    }

    .skills-overview-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-content {
        padding: 80px var(--spacing-md) 50px;
    }

    .timeline-nav {
        flex-direction: column;
        gap: 15px;
    }

    .timeline-nav::before {
        left: 31px;
        top: 40px;
        bottom: 40px;
        width: 2px;
        height: auto;
        background: linear-gradient(to bottom, var(--color-border), var(--color-primary), var(--color-border));
    }

    .timeline-period {
        padding: 15px 15px 15px 50px;
        min-width: auto;
        text-align: left;
    }

    .timeline-period::before {
        left: 25px;
        top: 50%;
        transform: translateY(-50%);
    }

    .timeline-period.active::before {
        transform: translateY(-50%) scale(1.2);
    }

    .timeline-period:hover,
    .timeline-period.active:hover {
        transform: translateX(4px);
    }

    .timeline-period.active {
        transform: translateX(8px);
    }

    .contact-links {
        flex-direction: column;
        gap: 15px;
    }

    .main-content {
        flex-direction: column;
        align-items: center;
    }
}