:root {
    --black: #050507;
    --dark: #0a0b0f;
    --surface: #111318;
    --surface2: #181b22;
    --border: #1e2130;
    --border-light: #2a2f42;
    --gray: #3a4058;
    --gray-light: #6b7599;
    --blue: #4d9fff;
    --blue-dim: #2563a8;
    --blue-bright: #7bbfff;
    --cyan: #38c9f0;
    --cyan-dim: #1a7fa0;
    --blue-glow: rgba(77,159,255,0.12);
    --cyan-glow: rgba(56,201,240,0.10);
    --text: #dde3f0;
    --text-muted: #7a87a8;
    --text-dim: #464f6a;
    --font-display: 'Syne', sans-serif;
    --font-mono: 'DM Mono', monospace;
    --font-body: 'DM Sans', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    background: var(--black);
    color: var(--text);
    font-family: var(--font-body);
    overflow-x: hidden;
    cursor: default;
}

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--dark); }
::-webkit-scrollbar-thumb { background: linear-gradient(var(--cyan), var(--blue)); border-radius: 2px; }

/* ─── NOISE OVERLAY ─── */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 9999;
    opacity: 0.4;
}

/* ─── NAV ─── */
nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 3rem;
    height: 64px;
    background: rgba(5,5,5,0.85);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: var(--blue);
    text-transform: uppercase;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

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

.nav-cta {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--black) !important;
    background: linear-gradient(90deg, var(--blue), var(--cyan));
    padding: 0.4rem 1rem;
    border-radius: 2px;
    transition: background 0.2s !important;
}
.nav-cta:hover { background: var(--blue-bright) !important; color: var(--black) !important; }

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 4px;
}
.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: 0.3s;
}

/* ─── HERO ─── */
#hero {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    padding: 0 3rem;
    gap: 4rem;
    position: relative;
    overflow: hidden;
}

#hero::after {
    content: '';
    position: absolute;
    right: -10%;
    top: 50%;
    transform: translateY(-50%);
    width: 500px;
    height: 500px;
    background: radial-gradient(ellipse 600px 400px at 80% 50%, rgba(77,159,255,0.1) 0%, rgba(56,201,240,0.04) 50%, transparent 75%);
    pointer-events: none;
}

.hero-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--blue);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}
.hero-label::before {
    content: '';
    display: block;
    width: 32px;
    height: 1px;
    background: var(--blue);
}

.hero-name {
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 6vw, 5.5rem);
    font-weight: 800;
    line-height: 0.95;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.hero-name span {
    display: block;
    color: var(--blue);
}

.hero-role {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    text-transform: uppercase;
    margin: 1.5rem 0;
    padding-left: 1rem;
    border-left: 2px solid var(--blue-dim);
}

.hero-bio {
    font-size: 1rem;
    line-height: 1.75;
    color: #aaa;
    max-width: 520px;
    margin-bottom: 2.5rem;
}

.hero-bio strong { color: var(--text); }

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn-primary {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    text-decoration: none;
    background: linear-gradient(90deg, var(--blue), var(--cyan));
    color: var(--black);
    padding: 0.75rem 1.8rem;
    border-radius: 2px;
    transition: background 0.2s, transform 0.2s;
    font-weight: 500;
}
.btn-primary:hover { background: var(--blue-bright); transform: translateY(-2px); }

.btn-outline {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    text-decoration: none;
    background: transparent;
    color: var(--text);
    padding: 0.75rem 1.8rem;
    border-radius: 2px;
    border: 1px solid var(--border-light);
    transition: border-color 0.2s, color 0.2s, transform 0.2s;
}
.btn-outline:hover { border-color: var(--blue); color: var(--blue); transform: translateY(-2px); }

/* Hero right - visual card */
.hero-card {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-card-inner {
    position: relative;
    width: 340px;
}

.hero-avatar-wrap {
    width: 340px;
    height: 420px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.hero-avatar-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #080b12 0%, #0f1520 60%, #111820 100%);
}

.avatar-initials {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 7rem;
    font-weight: 800;
    color: var(--border-light);
    letter-spacing: -0.05em;
    user-select: none;
}
.avatar-initials figure {
    margin: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.avatar-initials img {
    max-width: 100%;
    max-height: 100%;
    object-fit: cover;
    display: block;
}

.avatar-initials figcaption {
    margin-top: 10px;
    font-size: 1rem;
    text-align: center;
}
.hero-card-badge {
    position: absolute;
    bottom: -1rem;
    right: -1.5rem;
    background: var(--blue);
    color: var(--black);
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    padding: 0.6rem 1rem;
    border-radius: 2px;
    white-space: nowrap;
}

.hero-stats {
    margin-top: 2.5rem;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow: hidden;
}

.stat {
    background: var(--surface);
    padding: 1rem 0.8rem;
    text-align: center;
}

.stat-num {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--blue);
    display: block;
}

.stat-label {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.08em;
    color: var(--text-dim);
    text-transform: uppercase;
    margin-top: 0.2rem;
    display: block;
}

/* ─── SECTION BASE ─── */
section {
    padding: 6rem 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    margin-bottom: 4rem;
}

.section-tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--cyan);
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}
.section-tag::before {
    content: '';
    display: inline-block;
    width: 24px;
    height: 1px;
    background: var(--cyan);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.divider {
    width: 100%;
    height: 1px;
    background: var(--border);
}

/* ─── ABOUT ─── */
#about {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: start;
    padding: 6rem 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

.about-text p {
    font-size: 1.05rem;
    line-height: 1.85;
    color: #999;
    margin-bottom: 1.2rem;
}
.about-text p strong { color: var(--text); }

.about-quote {
    margin: 2rem 0;
    padding: 1.5rem;
    border-left: 3px solid var(--blue);
    background: var(--surface);
    border-radius: 0 4px 4px 0;
}
.about-quote p {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text) !important;
    font-style: italic;
    margin: 0 !important;
}
.about-quote cite {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--blue);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-top: 0.5rem;
    display: block;
}

.about-skills h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text);
}

.skill-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.6rem;
    margin-bottom: 2rem;
}

.skill-chip {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.06em;
    padding: 0.5rem 0.8rem;
    border: 1px solid var(--border-light);
    border-radius: 2px;
    color: var(--text-muted);
    background: var(--surface);
    transition: border-color 0.2s, color 0.2s;
    text-align: center;
}
.skill-chip:hover { border-color: var(--blue-dim); color: var(--blue); }

.skill-chip.highlight {
    border-color: var(--cyan-dim);
    color: var(--cyan);
    background: var(--cyan-glow);
}

/* ─── EXPERIENCE ─── */
#experience {
    padding: 6rem 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(to bottom, var(--cyan), var(--blue), transparent);
}

.timeline-item {
    position: relative;
    padding: 0 0 3.5rem 2rem;
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.5s, transform 0.5s;
}
.timeline-item.visible { opacity: 1; transform: none; }

.timeline-item::before {
    content: '';
    position: absolute;
    left: -0.4rem;
    top: 0.4rem;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--blue);
    border: 2px solid var(--black);
}

.timeline-item.current::before {
    background: var(--blue);
    box-shadow: 0 0 12px var(--blue);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 6px var(--blue); }
    50% { box-shadow: 0 0 20px var(--blue); }
}

.tl-period {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    color: var(--blue);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.tl-company {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.2rem;
}

.tl-role {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-muted);
    letter-spacing: 0.06em;
    margin-bottom: 1rem;
}

.tl-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.2rem 0.6rem;
    border-radius: 2px;
    border: 1px solid var(--border-light);
    color: var(--text-dim);
    margin-bottom: 0.8rem;
}

.tl-badge.active {
    border-color: var(--cyan-dim);
    color: var(--cyan);
    background: var(--cyan-glow);
}

.tl-desc {
    font-size: 0.95rem;
    line-height: 1.75;
    color: #888;
}

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

.tl-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.tag {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.06em;
    padding: 0.25rem 0.6rem;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 2px;
    color: var(--text-dim);
}

/* ─── EDUCATION ─── */
#education {
    padding: 6rem 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

.edu-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 3rem;
}

.edu-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 2rem;
    transition: border-color 0.2s, transform 0.2s;
    position: relative;
    overflow: hidden;
}

.edu-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 3px;
    height: 100%;
    background: linear-gradient(to bottom, var(--cyan), var(--blue));
}

.edu-card:hover {
    border-color: var(--blue-dim);
    transform: translateY(-4px);
}

.edu-card-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.edu-card-degree {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
    color: var(--text);
}

.edu-card-school {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--blue);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 0.3rem;
}

.edu-card-period {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-dim);
    letter-spacing: 0.06em;
}

/* ─── COURSES ─── */
#courses {
    padding: 6rem 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

.courses-intro {
    max-width: 650px;
    font-size: 1rem;
    line-height: 1.75;
    color: #888;
    margin-bottom: 3rem;
}
.courses-intro strong { color: var(--text); }

.courses-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.tab-btn {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.5rem 1.2rem;
    background: transparent;
    border: 1px solid var(--border-light);
    color: var(--text-muted);
    border-radius: 2px;
    cursor: pointer;
    transition: 0.2s;
}

.tab-btn.active, .tab-btn:hover {
    background: var(--blue-glow);
    border-color: var(--blue-dim);
    color: var(--blue);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
}

.course-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1.6rem;
    transition: border-color 0.2s, transform 0.2s, background 0.2s;
    text-decoration: none;
    display: block;
    position: relative;
    overflow: hidden;
}

.course-card::after {
    content: '→';
    position: absolute;
    top: 1.2rem; right: 1.2rem;
    font-size: 0.9rem;
    color: var(--text-dim);
    transition: color 0.2s, transform 0.2s;
}

.course-card:hover {
    border-color: var(--blue-dim);
    background: var(--surface2);
    transform: translateY(-4px);
}

.course-card:hover::after {
    color: var(--blue);
    transform: translate(3px, -3px);
}

.course-num {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 800;
    color: var(--border-light);
    line-height: 1;
    margin-bottom: 0.8rem;
}

.course-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.4rem;
}

.course-sub {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-dim);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.course-card.hidden { display: none; }

/* ─── SITES SECTION ─── */
#sites {
    padding: 6rem 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

.sites-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}

.site-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 2rem;
    text-decoration: none;
    display: flex;
    align-items: flex-start;
    gap: 1.2rem;
    transition: border-color 0.2s, transform 0.2s;
}

.site-card:hover {
    border-color: var(--blue-dim);
    transform: translateY(-4px);
}

.site-icon {
    width: 48px;
    height: 48px;
    background: var(--blue-glow);
    border: 1px solid var(--blue-dim);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.4rem;
}

.site-info h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.3rem;
}

.site-info p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin-bottom: 0.5rem;
}

.site-url {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--blue);
    letter-spacing: 0.06em;
}

/* ─── CONTACT ─── */
#contact {
    padding: 6rem 3rem;
    max-width: 1200px;
    margin: 0 auto;
}

.contact-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: start;
}

.contact-text p {
    font-size: 1rem;
    line-height: 1.75;
    color: #888;
    margin-bottom: 2rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.2rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    text-decoration: none;
    transition: border-color 0.2s;
}
.contact-item:hover { border-color: var(--blue-dim); }

.contact-item-icon {
    width: 36px;
    height: 36px;
    background: var(--blue-glow);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1rem;
}

.contact-item-text span {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.08em;
    color: var(--text-dim);
    text-transform: uppercase;
    margin-bottom: 0.15rem;
}
.contact-item-text strong {
    font-size: 0.9rem;
    color: var(--text);
    font-weight: 400;
}

/* Social links */
.social-row {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.social-btn {
    width: 44px;
    height: 44px;
    background: var(--surface);
    border: 1px solid var(--border-light);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--text-muted);
    transition: 0.2s;
    font-size: 1.1rem;
}
.social-btn:hover {
    border-color: var(--cyan-dim);
    color: var(--cyan);
    background: var(--cyan-glow);
}

/* Contact form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-row { display: flex; gap: 1rem; }
.form-group { flex: 1; display: flex; flex-direction: column; gap: 0.4rem; }

.form-group label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.form-group input,
.form-group textarea,
.form-group select {
    background: var(--surface);
    border: 1px solid var(--border-light);
    border-radius: 2px;
    padding: 0.75rem 1rem;
    color: var(--text);
    font-family: var(--font-body);
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.2s;
    resize: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--blue-dim);
}

.form-group textarea { height: 120px; }

.form-submit {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    background: linear-gradient(90deg, var(--blue), var(--cyan));
    color: var(--black);
    border: none;
    padding: 0.85rem 2rem;
    border-radius: 2px;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
    font-weight: 500;
    align-self: flex-start;
}
.form-submit:hover { background: var(--blue-bright); transform: translateY(-2px); }

.form-success {
    display: none;
    padding: 1rem;
    background: rgba(77,159,255,0.1);
    border: 1px solid var(--blue-dim);
    border-radius: 2px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--blue);
    letter-spacing: 0.08em;
}

/* ─── FOOTER ─── */
footer {
    border-top: 1px solid var(--border);
    padding: 2.5rem 3rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 800;
    color: var(--blue);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.footer-copy {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-dim);
    letter-spacing: 0.06em;
}

/* ─── SCROLL TO TOP ─── */
#scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    background: linear-gradient(90deg, var(--blue), var(--cyan));
    color: var(--black);
    border: none;
    border-radius: 2px;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.3s, transform 0.3s;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: center;
}
#scroll-top.show { opacity: 1; transform: none; }
#scroll-top:hover { background: var(--blue-bright); }

/* ─── MOBILE ─── */
@media (max-width: 768px) {
    nav { padding: 0 1.5rem; }
    .nav-links { display: none; }
    .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 64px; left: 0; right: 0;
    background: var(--dark);
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    gap: 1rem;
    z-index: 99;
    }
    .hamburger { display: flex; }

    #hero {
    grid-template-columns: 1fr;
    padding: 8rem 1.5rem 4rem;
    text-align: center;
    gap: 2.5rem;
    }
    .hero-label { justify-content: center; }
    .hero-bio { margin: 0 auto 2.5rem; }
    .hero-actions { justify-content: center; }
    .hero-card-inner { width: 100%; max-width: 300px; margin: 0 auto; }
    .hero-avatar-wrap { width: 100%; height: 300px; }

    #about { grid-template-columns: 1fr; padding: 4rem 1.5rem; gap: 3rem; }
    section { padding: 4rem 1.5rem; }
    #experience, #education, #courses, #sites, #contact { padding: 4rem 1.5rem; }
    .edu-grid { grid-template-columns: 1fr; }
    .courses-grid { grid-template-columns: 1fr 1fr; }
    .sites-grid { grid-template-columns: 1fr; }
    .contact-wrap { grid-template-columns: 1fr; gap: 3rem; }
    .form-row { flex-direction: column; }
    footer { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
    .courses-grid { grid-template-columns: 1fr; }
    .hero-stats { grid-template-columns: 1fr 1fr 1fr; }
}

/* ─── ANIMATIONS ─── */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
    opacity: 1;
    transform: none;
}

/* Typing cursor */
.typed::after {
    content: '|';
    animation: blink 1s infinite;
    color: var(--blue);
}
@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}