:root {
    /* DEFAULT (DARK MODE) */
    --bg: #0A0A0A;
    --bg-soft: #111111;
    --card-bg: rgba(255, 255, 255, 0.04);
    --ink: #FFFFFF;
    --ink-light: #B9B9B9;
    --ink-muted: #8A8A8A;
    --line: rgba(255, 255, 255, 0.1);
    --border: 1px solid var(--line);
    --highlight: #3385FF;
    --highlight-deep: #0066FF;
    --glow: rgba(51, 133, 255, 0.25);
    --gradient: linear-gradient(135deg, #0A0A0A 0%, #141414 100%);
    --shadow: 0 10px 30px rgba(0,0,0,0.5);
    --pad: clamp(2rem, 6vw, 5rem);
    --radius: 20px;
}

[data-theme="light"] {
    --bg: #FAFAF8;
    --bg-soft: #F1F1EE;
    --card-bg: rgba(0, 0, 0, 0.03);
    --ink: #0B0B0B;
    --ink-light: #3D3D3D;
    --ink-muted: #6B6B6B;
    --line: rgba(0, 0, 0, 0.1);
    --highlight: #0049CC;
    --highlight-deep: #0049CC;
    --glow: rgba(0, 73, 204, 0.12);
    --gradient: linear-gradient(135deg, #FAFAF8 0%, #F0F0ED 100%);
    --shadow: 0 10px 30px rgba(0,0,0,0.06);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; background: var(--bg); }
body {
    background: var(--bg);
    color: var(--ink);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    transition: background 0.4s ease, color 0.4s ease;
}
::selection { background: var(--highlight); color: #fff; }

h1, h2, h3, h4 { font-weight: 900; letter-spacing: -0.04em; line-height: 1.05; text-wrap: balance; }
p { text-wrap: pretty; }
.mono { font-family: 'Space Mono', monospace; font-size: 0.85rem; letter-spacing: 0.05em; text-transform: uppercase; }
.eyebrow { font-family: 'Space Mono', monospace; font-size: 0.8rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--highlight); display: inline-flex; align-items: center; gap: 0.6rem; }
.eyebrow::before { content: ""; width: 2rem; height: 2px; background: var(--highlight); display: inline-block; }

a { color: inherit; text-decoration: none; }
:focus-visible { outline: 3px solid var(--highlight); outline-offset: 4px; border-radius: 4px; }

img { max-width: 100%; }

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(36px); transition: opacity 0.9s cubic-bezier(0.16,1,0.3,1), transform 0.9s cubic-bezier(0.16,1,0.3,1); transition-delay: var(--d, 0ms); will-change: opacity, transform; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Parallax decoration ---------- */
.orb {
    position: absolute; border-radius: 50%; pointer-events: none; z-index: 0;
    background: radial-gradient(circle at 35% 35%, var(--glow), transparent 68%);
    filter: blur(10px);
    will-change: transform;
}
#fx3d { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
#fx3d canvas { display: block; width: 100%; height: 100%; }

.grid-lines {
    position: absolute; inset: 0; pointer-events: none; z-index: 0; opacity: 0.5;
    background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size: 72px 72px;
    -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black 0%, transparent 75%);
    mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black 0%, transparent 75%);
}

.glass {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: var(--border);
    border-radius: var(--radius);
    transition: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- Layout ---------- */
.layout { display: grid; grid-template-columns: 300px 1fr; min-height: 100vh; }

.sidebar {
    position: sticky; top: 0; height: 100vh;
    border-right: var(--border);
    padding: 2.5rem 2rem;
    display: flex; flex-direction: column; justify-content: space-between;
    background: var(--bg);
    z-index: 1000;
}
.nav-menu { margin-top: 3rem; display: flex; flex-direction: column; gap: 0.25rem; }
.nav-link {
    font-size: 1rem; font-weight: 700; color: var(--ink-muted);
    padding: 0.7rem 0.5rem; min-height: 44px; display: flex; align-items: center; gap: 0.9rem;
    border-radius: 10px;
    transition: color 0.25s, transform 0.25s, background 0.25s;
}
.nav-link:hover, .nav-link.active { color: var(--ink); transform: translateX(6px); }
.nav-link:hover { background: var(--card-bg); }
.nav-link.active::before { content: ""; width: 8px; height: 8px; background: var(--highlight); border-radius: 50%; box-shadow: 0 0 10px var(--highlight); flex: none; }

.sidebar-contact a { display: inline-block; padding: 0.35rem 0; min-height: 32px; color: var(--ink-light); text-decoration: underline; text-underline-offset: 3px; }
.sidebar-contact a:hover { color: var(--highlight); }
.lang-switch { display: flex; gap: 0.25rem; margin-bottom: 1rem; border-top: var(--border); padding-top: 1.25rem; }
.lang-btn {
    font-family: 'Space Mono', monospace; font-size: 0.8rem; letter-spacing: 0.08em;
    padding: 0.5rem 0.9rem; min-height: 40px; min-width: 44px; display: inline-flex; align-items: center; justify-content: center;
    border-radius: 50px; border: var(--border); background: transparent; color: var(--ink-muted); cursor: pointer; transition: 0.25s;
}
.lang-btn:hover { color: var(--ink); }
.lang-btn.active { background: var(--ink); color: var(--bg); border-color: var(--ink); font-weight: 700; }

.theme-toggle {
    background: var(--card-bg); border: var(--border); color: var(--ink);
    padding: 0.6rem 1.1rem; min-height: 44px; border-radius: 50px; cursor: pointer;
    font-size: 0.85rem; font-family: 'Space Mono', monospace;
    display: inline-flex; align-items: center; gap: 0.5rem; transition: 0.3s;
}
.theme-toggle:hover { background: var(--highlight); color: #fff; border-color: var(--highlight); }

/* ---------- Main ---------- */
main { background: var(--gradient); min-width: 0; overflow-x: clip; }
section { padding: var(--pad); border-bottom: var(--border); position: relative; }
.section-hero { min-height: 88vh; display: flex; flex-direction: column; justify-content: center; overflow: hidden; }

.txt-huge { font-size: clamp(2.9rem, 8.5vw, 7.2rem); margin-bottom: 1.5rem; }
.txt-title { font-size: clamp(2rem, 4.5vw, 3.2rem); }
.txt-lead { font-size: clamp(1.05rem, 2vw, 1.25rem); font-weight: 400; color: var(--ink-light); max-width: 52ch; }

.kinetic span { display: inline-block; transform: translateY(110%); opacity: 0; animation: riseIn 0.9s cubic-bezier(0.16,1,0.3,1) forwards; animation-delay: var(--kd, 0ms); }
.kinetic { overflow: hidden; display: block; }
@keyframes riseIn { to { transform: translateY(0); opacity: 1; } }

/* ---------- Marquee ---------- */
.marquee { overflow: hidden; border-top: var(--border); border-bottom: var(--border); padding: 1.1rem 0; background: var(--bg-soft); white-space: nowrap; position: relative; }
.marquee-track { display: inline-flex; gap: 3.5rem; padding-right: 3.5rem; animation: marquee 30s linear infinite; will-change: transform; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee span { font-family: 'Space Mono', monospace; font-size: 0.9rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--ink-muted); display: inline-flex; align-items: center; gap: 3.5rem; }
.marquee span::after { content: "✦"; color: var(--highlight); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- Persona ---------- */
.persona-control { display: flex; gap: 0.4rem; margin-bottom: 1.6rem; background: var(--card-bg); padding: 5px; border-radius: 50px; width: fit-content; border: var(--border); }
.p-btn {
    border: none; background: transparent; color: var(--ink-muted);
    padding: 0.75rem 1.6rem; min-height: 48px; border-radius: 50px; cursor: pointer;
    font-weight: 700; font-family: 'Space Mono', monospace; font-size: 0.85rem; transition: 0.3s;
}
.p-btn.active { background: var(--highlight-deep); color: white; box-shadow: 0 10px 20px var(--glow); }

/* ---------- Stats ---------- */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.2rem; }
.stat { padding: 2.2rem 1.8rem; border-radius: var(--radius); }
.stat b { font-size: clamp(2.4rem, 5vw, 3.6rem); font-weight: 900; letter-spacing: -0.04em; line-height: 1; display: block; color: var(--ink); font-variant-numeric: tabular-nums; }
.stat b em { font-style: normal; color: var(--highlight); }
.stat b span { font: inherit; color: inherit; display: inline; margin: 0; }
.stat > span { display: block; margin-top: 0.8rem; color: var(--ink-muted); font-family: 'Space Mono', monospace; font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; }

/* ---------- Experience timeline ---------- */
.timeline { position: relative; margin-top: 3.5rem; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 8px; bottom: 8px; width: 2px; background: var(--line); }
.job-row {
    position: relative; padding: 1.8rem 1.5rem 1.8rem 3rem; margin-bottom: 0.6rem;
    border-radius: var(--radius); cursor: pointer; border: 1px solid transparent;
    transition: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    display: grid; grid-template-columns: 150px 1fr auto; gap: 1.5rem; align-items: start;
    background: transparent; width: 100%; text-align: left; color: inherit; font: inherit;
}
.job-row::before { content: ""; position: absolute; left: 1px; top: 2.4rem; width: 14px; height: 14px; border-radius: 50%; background: var(--bg); border: 3px solid var(--ink-muted); transition: 0.3s; }
.job-row:hover { background: var(--card-bg); border-color: var(--line); box-shadow: var(--shadow); }
.job-row:hover::before, .job-row:focus-visible::before { border-color: var(--highlight); box-shadow: 0 0 12px var(--highlight); }
.job-row h3 { font-size: clamp(1.25rem, 2.4vw, 1.7rem); margin-bottom: 0.4rem; }
.job-row .company { font-weight: 700; color: var(--highlight); font-family: 'Space Mono', monospace; font-size: 0.85rem; }
.job-row .desc { color: var(--ink-light); margin-top: 0.5rem; font-size: 0.98rem; }
.arrow-icon { color: var(--highlight); font-size: 1.1rem; margin-top: 0.6rem; transition: 0.3s; }
.job-row:hover .arrow-icon { transform: rotate(90deg) scale(1.15); }

/* ---------- Modal ---------- */
.modal-overlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.85); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    z-index: 2000; opacity: 0; pointer-events: none; transition: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex; justify-content: center; align-items: center;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal-content {
    background: var(--bg); border: var(--border); color: var(--ink);
    padding: clamp(1.8rem, 5vw, 4rem); max-width: 850px; width: 92%;
    max-height: 85vh; overflow-y: auto; border-radius: 24px;
    box-shadow: 0 40px 100px rgba(0,0,0,0.6);
    transform: translateY(40px); transition: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
}
.modal-overlay.open .modal-content { transform: translateY(0); }
.close-modal {
    position: sticky; top: 0; float: right; margin-left: 1rem;
    width: 48px; height: 48px; display: grid; place-items: center;
    font-size: 1.6rem; cursor: pointer; border-radius: 50%;
    background: var(--card-bg); border: var(--border); color: var(--ink); transition: 0.3s; z-index: 5;
}
.close-modal:hover { color: #fff; background: var(--highlight); border-color: var(--highlight); }

/* ---------- Projects ---------- */
.grid-projects { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(380px, 100%), 1fr)); gap: 2.2rem; }
.project-card {
    position: relative; overflow: hidden; border-radius: var(--radius); background: #0c0c0c;
    aspect-ratio: 4 / 3; display: block; border: var(--border); box-shadow: var(--shadow);
    transition: 0.45s cubic-bezier(0.16, 1, 0.3, 1);
    padding: 0; width: 100%; text-align: left; font: inherit; color: inherit; cursor: pointer;
}

.chip-avail {
    display: inline-flex; align-items: center; gap: 0.6rem;
    font-family: 'Space Mono', monospace; font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase;
    padding: 0.5rem 1.1rem; border-radius: 50px; border: var(--border); background: var(--card-bg); color: var(--ink-light);
    margin-bottom: 1.6rem;
}
.chip-avail::before { content: ""; width: 9px; height: 9px; border-radius: 50%; background: #22C55E; box-shadow: 0 0 10px #22C55E; animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: 0.4; } }
.p-img { position: absolute; inset: 0; opacity: 0.75; transition: 0.8s cubic-bezier(0.16,1,0.3,1); }
.p-img img { width: 100%; height: 100%; object-fit: cover; object-position: top center; }
.p-info { position: absolute; bottom: 0; left: 0; right: 0; padding: 2rem; background: linear-gradient(to top, rgba(0,0,0,0.92) 25%, transparent); z-index: 10; display: flex; flex-direction: column; gap: 0.35rem; }
.p-info h3 { font-size: clamp(1.3rem, 2.5vw, 1.7rem); color: #fff; }
.p-info .mono { color: rgba(255,255,255,0.65); font-size: 0.75rem; }
.p-cta { margin-top: 0.6rem; color: var(--highlight); font-family: 'Space Mono', monospace; font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; opacity: 0; transform: translateY(8px); transition: 0.4s; }
.project-card:hover { transform: translateY(-8px); border-color: var(--highlight); }
.project-card:hover .p-img { opacity: 1; transform: scale(1.06); }
.project-card:hover .p-cta, .project-card:focus-visible .p-cta { opacity: 1; transform: none; }

/* ---------- Stack / chips ---------- */
.stack-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; }
.stack-item { display: flex; align-items: center; gap: 0.8rem; padding: 0.9rem 1.2rem; min-height: 48px; border-radius: 12px; font-weight: 600; font-size: 0.95rem; transition: 0.3s; }
.stack-item:hover { transform: translateY(-3px); background: var(--highlight-deep); color: #fff; border-color: var(--highlight-deep); }
.stack-item i { font-size: 1.2rem; color: var(--highlight); }
.stack-item:hover i { color: #fff; }

/* ---------- AI-DLC ---------- */
.dlc-card { padding: clamp(2rem, 4vw, 4rem); border: var(--border); border-radius: 24px; position: relative; overflow: hidden; }
.dlc-card::after { content: ""; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%; background: radial-gradient(circle, var(--highlight) 0%, transparent 70%); opacity: 0.04; pointer-events: none; }

.process-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.4rem; }
.process-card { padding: 2.6rem 2rem; display: flex; flex-direction: column; }
.process-card:hover { transform: translateY(-8px); border-color: var(--highlight); }

/* ---------- Buttons ---------- */
.btn-brutalist {
    padding: 1.2rem 2.6rem; min-height: 56px; font-weight: 900; text-transform: uppercase;
    background: var(--ink); color: var(--bg); border: 2px solid var(--ink); border-radius: 10px;
    cursor: pointer; transition: 0.3s; letter-spacing: 2px; font-size: 0.9rem;
    display: inline-flex; align-items: center; gap: 0.6rem;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}
.btn-brutalist:hover { background: var(--highlight-deep); border-color: var(--highlight-deep); color: #fff; transform: translateY(-4px); box-shadow: 0 20px 40px var(--glow); }
.btn-ghost { background: transparent; color: var(--ink); }

/* ---------- Blog ---------- */
.blog-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(340px, 100%), 1fr)); gap: 1.6rem; }
.blog-card {
    padding: 2.4rem 2rem; border-radius: var(--radius); cursor: pointer;
    display: flex; flex-direction: column; gap: 1rem; text-align: left;
    background: var(--card-bg); border: var(--border); color: inherit; font: inherit;
    transition: 0.35s cubic-bezier(0.16,1,0.3,1); position: relative; overflow: hidden;
}
.blog-card::after { content: "→"; position: absolute; top: 1.6rem; right: 1.8rem; font-size: 1.4rem; color: var(--highlight); transition: 0.3s; }
.blog-card:hover { transform: translateY(-6px); border-color: var(--highlight); box-shadow: var(--shadow); }
.blog-card:hover::after { transform: translateX(6px); }
.blog-card .meta { font-family: 'Space Mono', monospace; font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-muted); display: flex; gap: 1rem; flex-wrap: wrap; }
.blog-card .meta b { color: var(--highlight); font-weight: 400; }
.blog-card h3 { font-size: clamp(1.3rem, 2.4vw, 1.7rem); padding-right: 2.2rem; }
.blog-card p { color: var(--ink-light); font-size: 0.98rem; }

.article-body h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin: 2.4rem 0 1rem; }
.article-body p { margin-bottom: 1.2rem; color: var(--ink-light); font-size: 1.08rem; line-height: 1.75; }
.article-body strong { color: var(--ink); }
.article-body blockquote { border-left: 4px solid var(--highlight); padding-left: 1.4rem; margin: 1.8rem 0; font-size: 1.15rem; font-style: italic; color: var(--ink); }
.article-body ul { margin: 0 0 1.2rem 1.2rem; color: var(--ink-light); }
.article-body li { margin-bottom: 0.5rem; }

/* ---------- Education ---------- */
.edu-item { border-left: 4px solid var(--highlight); padding-left: 1.5rem; margin-bottom: 2.2rem; }
.edu-item h4 { font-size: 1.35rem; }
.edu-item p { color: var(--ink-light); margin-top: 0.4rem; font-family: 'Space Mono', monospace; font-size: 0.8rem; letter-spacing: 0.05em; text-transform: uppercase; }

/* ---------- Footer CTA ---------- */
.footer-cta { padding: clamp(3rem, 8vw, 6rem) var(--pad); position: relative; overflow: hidden; }
.footer-cta h2 { font-size: clamp(2.6rem, 6vw, 4.5rem); margin-bottom: 1.2rem; }
.footer-cta .mail { font-size: clamp(1.3rem, 3.5vw, 2rem); text-decoration: underline; text-underline-offset: 6px; font-weight: 700; color: var(--highlight); word-break: break-all; }
.contact-links { display: flex; gap: 3rem; flex-wrap: wrap; margin-top: 3rem; }
.contact-item .mono { display: block; margin-bottom: 0.6rem; font-size: 0.75rem; color: var(--ink-muted); }
.contact-item a, .contact-item > span { font-size: 1.1rem; font-weight: 700; color: var(--ink); transition: 0.3s; }
.contact-item a:hover { color: var(--highlight); }
.footer-note { margin-top: 4rem; padding-top: 1.5rem; border-top: var(--border); color: var(--ink-muted); font-family: 'Space Mono', monospace; font-size: 0.72rem; letter-spacing: 0.08em; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }

/* ---------- Mobile ---------- */
.mobile-bar { display: none; position: fixed; top: 0; background: var(--bg); width: 100%; height: 64px; z-index: 1500; align-items: center; justify-content: space-between; padding: 0 1.2rem; border-bottom: var(--border); }
.hamburger { background: none; border: none; color: var(--ink); font-size: 1.3rem; width: 48px; height: 48px; display: grid; place-items: center; cursor: pointer; border-radius: 10px; }
.hamburger:hover { background: var(--card-bg); }

@media (max-width: 1100px) {
    .layout { grid-template-columns: 1fr; margin-top: 64px; }
    .mobile-bar { display: flex; }
    .sidebar { position: fixed; transform: translateX(-100%); width: 100%; height: calc(100dvh - 64px); top: 64px; border-right: none; padding: 1.5rem; overflow-y: auto; transition: transform 0.35s cubic-bezier(0.16,1,0.3,1); }
    .sidebar.active { transform: translateX(0); }
    section { padding: 2.5rem 1.25rem; }
    .section-hero { min-height: auto; padding-top: 3.5rem; padding-bottom: 3.5rem; }
    .job-row { grid-template-columns: 1fr; gap: 0.5rem; padding-left: 2.4rem; }
    .arrow-icon { position: absolute; top: 1.6rem; right: 1.4rem; }
    .modal-content { width: 95%; max-height: 90dvh; }
    .persona-control { width: 100%; flex-direction: column; border-radius: 18px; }
    .p-btn { width: 100%; text-align: left; }
    .contact-links { gap: 1.8rem; flex-direction: column; }
}

/* ---------- Motion safety ---------- */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
    .reveal { opacity: 1; transform: none; }
    .kinetic span { transform: none; opacity: 1; animation: none; }
    .marquee-track { animation: none; }
    .orb { display: none; }
}