/* ---------- Design tokens ---------- */
:root {
  --bg: #170e16;
  --bg-alt: #1c111b;
  --surface: #231523;
  --surface-hover: #2b182c66;
  --border: #3e2740;
  --text: #f5edf2;
  --text-dim: #c0a0ba;
  --text-faint: #8d7086;
  --accent: #ffb199;
  --accent-2: #ff8fab;
  --accent-grad: linear-gradient(120deg, #ffb199, #ff8fab);
  --on-accent: #1f0f1b;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 10px 30px -12px rgba(0, 0, 0, 0.55);
  --max-width: 1120px;
  --header-h: 72px;
  --ff: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --ff-mono: "Cascadia Code", "Consolas", "SFMono-Regular", Menlo, monospace;
}

* { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--ff);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3 { margin: 0; line-height: 1.15; }
p { margin: 0; }

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: var(--on-accent);
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  z-index: 1000;
}
.skip-link:focus { left: 0; }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  z-index: 100;
  background: rgba(23, 14, 22, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, background .25s ease;
}
.site-header.scrolled {
  border-bottom-color: var(--border);
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  font-family: var(--ff-mono);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.5px;
}
.brand-dot { color: var(--accent); }

.main-nav ul {
  display: flex;
  gap: 4px;
}
.main-nav a {
  display: inline-block;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  color: var(--text-dim);
  transition: color .2s ease, background .2s ease;
  white-space: nowrap;
}
.main-nav a:hover { color: var(--text); background: var(--surface-hover); }
.main-nav a.active { color: var(--accent); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.lang-switch {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
}
.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-family: var(--ff-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 5px 10px;
  border-radius: 999px;
  cursor: pointer;
  letter-spacing: 0.5px;
}
.lang-btn.active {
  background: var(--accent-grad);
  color: var(--on-accent);
}

.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
}
.burger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text);
  border-radius: 2px;
  transition: transform .25s ease, opacity .25s ease;
}
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--accent-grad);
  color: var(--on-accent);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 24px -8px rgba(255, 143, 171, .45); }
.btn-ghost {
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: var(--header-h);
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-blob {
  position: absolute;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.28;
}
.hero-blob-1 { background: #ffb199; top: -120px; right: -80px; }
.hero-blob-2 { background: #ff8fab; bottom: -160px; left: -120px; }
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 60% 40%, black, transparent 75%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 48px;
  width: 100%;
}
.eyebrow {
  font-family: var(--ff-mono);
  color: var(--accent);
  font-size: 0.95rem;
  letter-spacing: 1px;
  margin-bottom: 14px;
}
.hero-name {
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  font-weight: 800;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 10px;
}
.hero-role {
  font-size: clamp(1.1rem, 2.4vw, 1.5rem);
  color: var(--text);
  font-weight: 600;
  margin-bottom: 18px;
}
.hero-tagline {
  color: var(--text-dim);
  font-size: 1.05rem;
  max-width: 540px;
  margin-bottom: 32px;
}
.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.hero-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  color: var(--text-faint);
  font-size: 0.9rem;
}
.hero-socials { display: flex; gap: 14px; }
.hero-socials a { color: var(--text-dim); transition: color .2s ease, transform .2s ease; }
.hero-socials a:hover { color: var(--accent); transform: translateY(-2px); }

.hero-photo { display: flex; justify-content: center; }
.photo-frame {
  position: relative;
  width: min(360px, 80vw);
  aspect-ratio: 1 / 1;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.photo-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, transparent 55%, rgba(255,177,153,.18));
  pointer-events: none;
}
.photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scroll-hint {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--text-faint);
  font-size: 0.78rem;
  letter-spacing: 0.5px;
  animation: bob 2.4s ease-in-out infinite;
  z-index: 1;
}
@keyframes bob {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 8px); }
}

/* ---------- Sections ---------- */
.section { padding: 110px 0; }
.section-alt { background: var(--bg-alt); }
.kicker {
  font-family: var(--ff-mono);
  color: var(--accent);
  font-size: 0.85rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.section-title {
  font-size: clamp(1.8rem, 3.6vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 48px;
}

/* ---------- Reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 56px;
  align-items: start;
}
.about-text p {
  color: var(--text-dim);
  margin-bottom: 18px;
  font-size: 1.02rem;
}
.about-text a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: transparent;
  transition: text-decoration-color .2s ease;
}
.about-text a:hover { text-decoration-color: var(--accent); }
.about-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
}
.stat-value {
  font-family: var(--ff-mono);
  font-size: 2.1rem;
  font-weight: 700;
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-label {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-top: 4px;
}

/* ---------- Timeline (experience) ---------- */
.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 36px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(var(--border), transparent);
}
.timeline-item {
  position: relative;
  padding-left: 40px;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-alt);
  border: 2px solid var(--accent);
}
.timeline-period {
  font-family: var(--ff-mono);
  color: var(--accent);
  font-size: 0.85rem;
  margin-bottom: 6px;
}
.timeline-role {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 2px;
}
.timeline-org {
  color: var(--text-dim);
  font-size: 0.95rem;
  margin-bottom: 12px;
}
.timeline-org .dot { margin: 0 6px; opacity: .5; }
.timeline-desc {
  color: var(--text-dim);
  max-width: 740px;
  margin-bottom: 14px;
}
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  font-family: var(--ff-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 999px;
}

/* ---------- Skills (full-stack layer diagram) ---------- */
.skills-intro {
  color: var(--text-dim);
  max-width: 640px;
  font-size: 1rem;
  margin-bottom: 44px;
}

.stack {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.stack::before {
  content: "";
  position: absolute;
  left: 23px;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: linear-gradient(var(--border), transparent 95%);
}

.stack-layer {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 26px 24px;
}
.stack-layer-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 18px;
}
.stack-layer-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--accent);
}
.stack-layer-name { font-size: 1.1rem; font-weight: 800; margin-bottom: 2px; }
.stack-layer-tagline { color: var(--text-dim); font-size: 0.88rem; }

.stack-pills { display: flex; flex-wrap: wrap; gap: 9px; padding-left: 64px; }
.stack-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text);
}
.stack-pill-favorite {
  border-color: var(--accent);
  font-weight: 700;
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 25%, transparent);
}
.favorite-star { color: var(--accent); display: flex; flex-shrink: 0; }

@media (max-width: 560px) {
  .stack-pills { padding-left: 0; }
}

/* ---------- Projects ---------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 22px;
  margin-bottom: 56px;
}
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  display: flex;
  flex-direction: column;
  transition: transform .25s ease, border-color .25s ease;
}
.project-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.project-name { font-size: 1.15rem; font-weight: 700; margin-bottom: 4px; }
.project-org { color: var(--accent); font-size: 0.85rem; font-family: var(--ff-mono); margin-bottom: 14px; }
.project-desc { color: var(--text-dim); font-size: 0.95rem; margin-bottom: 16px; flex: 1; }

.more-title {
  font-size: 1.1rem;
  color: var(--text-dim);
  font-weight: 700;
  margin-bottom: 20px;
}
.more-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
  margin-bottom: 48px;
}
.more-item {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
}
.more-item .more-name { font-weight: 600; font-size: 0.92rem; margin-bottom: 4px; }
.more-item .more-tech { font-family: var(--ff-mono); font-size: 0.78rem; color: var(--text-faint); }

.github-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 30px;
}
.github-cta p { color: var(--text-dim); }

/* ---------- Education ---------- */
.education-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  max-width: 740px;
}
.edu-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 26px;
  margin-bottom: 18px;
}
.edu-period { font-family: var(--ff-mono); color: var(--accent); font-size: 0.82rem; margin-bottom: 6px; }
.edu-degree { font-size: 1.08rem; font-weight: 700; margin-bottom: 2px; }
.edu-school { color: var(--text-dim); font-size: 0.92rem; margin-bottom: 10px; }
.edu-desc { color: var(--text-dim); font-size: 0.92rem; }

/* ---------- Contact ---------- */
.contact-container { text-align: center; }
.contact-text {
  color: var(--text-dim);
  max-width: 560px;
  margin: 0 auto 40px;
  font-size: 1.05rem;
}
.contact-cards {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 18px;
  max-width: 820px;
  margin: 0 auto;
}
.contact-card {
  flex: 1 1 220px;
  max-width: 260px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  transition: transform .2s ease, border-color .2s ease;
}
.contact-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.contact-card svg { color: var(--accent); }
.contact-card .cc-label { font-size: 0.8rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.5px; }
.contact-card .cc-value { font-size: 0.95rem; font-weight: 600; word-break: break-word; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
}
.footer-inner {
  display: flex;
  justify-content: center;
  color: var(--text-faint);
  font-size: 0.85rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 920px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-meta { justify-content: center; }
  .hero-cta { justify-content: center; }
  .hero-photo { order: -1; }
  .about-grid, .education-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease;
  }
  .main-nav.open { max-height: 420px; }
  .main-nav ul { flex-direction: column; padding: 10px 24px 18px; gap: 2px; }
  .main-nav a { display: block; padding: 12px 10px; }
  .burger { display: flex; }
  .section { padding: 72px 0; }
}

@media (max-width: 480px) {
  .hero-cta { flex-direction: column; align-items: stretch; }
  .btn { justify-content: center; }
}