:root {
    --bg: #0a0a0f;
    --bg-alt: #0d0d14;
    --surface: #14141d;
    --surface-hover: #191924;
    --border: #24242f;
    --text: #e9e9ef;
    --text-dim: #9393a3;
    --accent: #22d3ee;
    --accent-dim: #0e7490;
    --font-heading: 'Space Grotesk', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --font-body: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
    --max-width: 1120px;
}

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

html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.bg-grid {
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image:
        linear-gradient(to right, rgba(255,255,255,0.035) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255,255,255,0.035) 1px, transparent 1px);
    background-size: 48px 48px;
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 20%, transparent 75%);
    mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 20%, transparent 75%);
}

a { color: inherit; text-decoration: none; }

ul { list-style: none; }

img { max-width: 100%; display: block; }

/* Nav */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.75);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--accent);
    font-size: 1.05rem;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
    font-size: 0.9rem;
}

.nav-links a {
    color: var(--text-dim);
    transition: color 0.2s ease;
}

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

.nav-cta {
    color: var(--accent) !important;
    border: 1px solid var(--accent-dim);
    padding: 6px 14px;
    border-radius: 6px;
}

.nav-cta:hover { background: rgba(34, 211, 238, 0.08); }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--text);
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.lang-dropdown {
    position: relative;
    margin-left: 20px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.lang-dropdown summary {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    color: var(--text-dim);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    list-style: none;
    user-select: none;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.lang-dropdown summary::-webkit-details-marker { display: none; }
.lang-dropdown summary:hover,
.lang-dropdown[open] summary { color: var(--text); border-color: var(--accent-dim); }

.lang-caret { transition: transform 0.2s ease; }
.lang-dropdown[open] .lang-caret { transform: rotate(180deg); }

.lang-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 160px;
    padding: 6px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
    z-index: 200;
}

.lang-menu a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 8px 10px;
    border-radius: 5px;
    color: var(--text-dim);
    transition: color 0.2s ease, background 0.2s ease;
}

.lang-menu a:hover { color: var(--text); background: var(--surface-hover); }

.lang-menu a.active { color: var(--accent); }

.lang-menu .lang-code { color: var(--text-dim); font-size: 0.72rem; }
.lang-menu a.active .lang-code { color: var(--accent); }

/* Sections */
.section { padding: 110px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.section-tag {
    font-family: var(--font-mono);
    color: var(--accent);
    font-size: 0.85rem;
    margin-bottom: 12px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(1.75rem, 3.5vw, 2.4rem);
    font-weight: 600;
    margin-bottom: 48px;
    max-width: 640px;
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 64px;
}

.hero-inner {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
    gap: 48px;
}

.eyebrow {
    font-family: var(--font-mono);
    color: var(--accent);
    font-size: 0.95rem;
    margin-bottom: 18px;
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(2.2rem, 5.5vw, 3.6rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
}

.hero-sub {
    color: var(--text-dim);
    font-size: 1.1rem;
    max-width: 480px;
    margin-bottom: 36px;
}

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
    display: inline-block;
    padding: 13px 26px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
    background: var(--accent);
    color: #06121a;
}

.btn-primary:hover { transform: translateY(-2px); background: #4ee3f4; }

.btn-ghost {
    border: 1px solid var(--border);
    color: var(--text);
}

.btn-ghost:hover { border-color: var(--accent-dim); transform: translateY(-2px); }

.hero-photo { display: flex; justify-content: center; }

.photo-frame {
    position: relative;
    width: min(340px, 80vw);
    aspect-ratio: 1 / 1;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: 0 0 0 1px rgba(34,211,238,0.08), 0 30px 60px -20px rgba(0,0,0,0.6);
}

.photo-frame::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(160deg, rgba(34,211,238,0.15), transparent 40%);
    pointer-events: none;
}

.photo-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(15%) contrast(1.05);
}

/* About */
.about-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 56px;
}

.about-text p { color: var(--text-dim); margin-bottom: 18px; }
.about-text strong { color: var(--text); }

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    align-content: start;
}

.stat {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
}

.stat-num {
    display: block;
    font-family: var(--font-mono);
    color: var(--accent);
    font-size: 1.9rem;
    font-weight: 700;
}

.stat-label {
    display: block;
    color: var(--text-dim);
    font-size: 0.85rem;
    margin-top: 6px;
}

/* Timeline */
.timeline {
    display: flex;
    flex-direction: column;
    gap: 36px;
    border-left: 1px solid var(--border);
    padding-left: 32px;
}

.timeline-item { position: relative; }

.timeline-marker {
    position: absolute;
    left: -37px;
    top: 4px;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px rgba(34,211,238,0.15);
}

.timeline-content h3 {
    font-size: 1.15rem;
    font-weight: 600;
}

.timeline-company { color: var(--accent); }

.timeline-meta {
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    margin: 6px 0 14px;
}

.timeline-content ul { display: flex; flex-direction: column; gap: 8px; }

.timeline-content li {
    color: var(--text-dim);
    padding-left: 18px;
    position: relative;
}

.timeline-content li::before {
    content: "▸";
    color: var(--accent);
    position: absolute;
    left: 0;
}

/* Skills */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.skill-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 22px;
    transition: border-color 0.2s ease;
}

.skill-card:hover { border-color: var(--accent-dim); }

.skill-card h3 {
    font-size: 0.95rem;
    color: var(--accent);
    margin-bottom: 14px;
    font-family: var(--font-mono);
}

.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }

.tag {
    font-size: 0.8rem;
    color: var(--text-dim);
    background: var(--bg-alt);
    border: 1px solid var(--border);
    padding: 5px 10px;
    border-radius: 6px;
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.project-card {
    position: relative;
    display: flex;
    min-height: 250px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

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

.project-shot {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: top center;
    background-color: var(--bg-alt);
    transform: scale(1.06);
    filter: saturate(0.7) brightness(0.55) blur(3px);
    transition: transform 0.5s ease, filter 0.3s ease;
}

.project-card:hover .project-shot {
    transform: scale(1.1);
    filter: saturate(0.85) brightness(0.65) blur(2px);
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(9,9,13,0.55) 0%, rgba(9,9,13,0.75) 45%, rgba(9,9,13,0.96) 100%);
    transition: background 0.3s ease;
}

.project-card:hover .project-overlay {
    background: linear-gradient(180deg, rgba(9,9,13,0.4) 0%, rgba(9,9,13,0.62) 45%, rgba(9,9,13,0.92) 100%);
}

.project-card-content {
    position: relative;
    z-index: 2;
    margin-top: auto;
    width: 100%;
    padding: 24px;
}

.project-card-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 10px;
}

.project-card-head h3 {
    font-size: 1.05rem;
    font-weight: 600;
}

.project-arrow {
    color: var(--accent);
    flex-shrink: 0;
}

.project-card p {
    color: var(--text-dim);
    font-size: 0.92rem;
    margin-bottom: 16px;
}

.project-url {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--accent-dim);
}

/* Testimonials */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.testimonial-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 26px;
}

.testimonial-quote {
    color: var(--text-dim);
    font-style: italic;
    margin-bottom: 16px;
}

.testimonial-author {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--accent);
}

/* Contact */
.contact-inner { text-align: center; }
.contact-inner .section-title { margin-left: auto; margin-right: auto; }
.contact-sub { color: var(--text-dim); max-width: 480px; margin: 0 auto 36px; }
.contact-actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }

/* Footer */
.footer { padding: 32px 0; border-top: 1px solid var(--border); }
.footer-inner {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    color: var(--text-dim);
    font-size: 0.85rem;
}
.footer-tag { font-family: var(--font-mono); }

/* Reveal animation */
.reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 860px) {
    .hero-inner { grid-template-columns: 1fr; text-align: center; }
    .hero-photo { order: -1; }
    .hero-actions { justify-content: center; }
    .about-grid { grid-template-columns: 1fr; }
    .nav-links {
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        align-items: flex-start;
        padding: 20px 24px;
        gap: 18px;
        display: none;
    }
    .nav-links.open { display: flex; }
    .nav-toggle { display: flex; }
    .lang-dropdown { margin-left: auto; margin-right: 10px; }
}

@media (max-width: 520px) {
    .section { padding: 70px 0; }
    .about-stats { grid-template-columns: 1fr 1fr; }
}