:root {
  --bg: #0a0a0f;
  --bg-soft: #12121b;
  --bg-card: #15151f;
  --border: #24242f;
  --border-soft: #1c1c26;
  --text: #e7e7ee;
  --text-dim: #a0a0b0;
  --text-faint: #6b6b7b;
  --accent: #7c9cff;
  --accent-bright: #9db4ff;
  --accent-glow: rgba(124, 156, 255, 0.14);
  --maxw: 760px;
  --radius: 14px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.5);
  --header-bg: rgba(10, 10, 15, 0.72);
}

/* Light theme overrides */
[data-theme="light"] {
  --bg: #fbfbfd;
  --bg-soft: #f1f2f7;
  --bg-card: #ffffff;
  --border: #e1e3ec;
  --border-soft: #eceef4;
  --text: #16161d;
  --text-dim: #4d4d5a;
  --text-faint: #87879a;
  --accent: #4f63d6;
  --accent-bright: #3a4cc0;
  --accent-glow: rgba(79, 99, 214, 0.10);
  --shadow-card: 0 10px 30px rgba(40, 50, 90, 0.10);
  --header-bg: rgba(251, 251, 253, 0.8);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  background-image:
    radial-gradient(1200px 600px at 70% -10%, var(--accent-glow), transparent 60%),
    radial-gradient(800px 500px at -10% 10%, rgba(124,156,255,0.06), transparent 55%);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background-color .25s ease, color .25s ease;
}

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

a { color: var(--accent); text-decoration: none; transition: color .15s ease; }
a:hover { color: var(--accent-bright); text-decoration: underline; text-underline-offset: 3px; }

.skip {
  position: absolute; left: -999px; top: 0;
  background: var(--accent); color: #0a0a0f; padding: 8px 14px; border-radius: 8px; z-index: 100;
}
.skip:focus { left: 12px; top: 12px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px);
  background: var(--header-bg);
  border-bottom: 1px solid var(--border-soft);
  transition: background-color .25s ease, border-color .25s ease;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 58px; }
.brand { font-family: var(--mono); font-size: .92rem; color: var(--text-dim); letter-spacing: -.01em; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.brand-mark { color: var(--accent); }
.site-header nav { display: flex; align-items: center; gap: 22px; flex-shrink: 0; }
.site-header nav a { color: var(--text-dim); font-size: .9rem; }
.site-header nav a:hover { color: var(--text); text-decoration: none; }

/* Theme toggle */
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; padding: 0;
  border: 1px solid var(--border); border-radius: 9px;
  background: var(--bg-soft); color: var(--text-dim);
  cursor: pointer; transition: color .15s ease, border-color .15s ease, background-color .15s ease;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }
.theme-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.theme-toggle svg { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: none; }

/* Hero */
.hero {
  display: grid; grid-template-columns: 120px 1fr; gap: 28px;
  align-items: start; padding: 64px 0 24px;
}
.avatar {
  border-radius: 50%; object-fit: cover;
  border: 2px solid var(--border);
  box-shadow: 0 0 0 4px var(--accent-glow), var(--shadow-card);
}
.hero-text h1 { margin: 0; font-size: 2.1rem; letter-spacing: -.02em; line-height: 1.1; }
.role { margin: 6px 0 14px; color: var(--accent); font-weight: 600; font-size: 1.02rem; }
.sep { color: var(--text-faint); margin: 0 6px; }
.tagline { margin: 0 0 18px; color: var(--text-dim); }
.tagline strong { color: var(--text); }

/* Availability status pill */
.status {
  display: inline-flex; align-items: center; gap: 8px;
  margin: 0 0 16px; padding: 5px 12px 5px 11px;
  border: 1px solid var(--border); border-radius: 999px;
  background: var(--bg-soft); color: var(--text-dim);
  font-size: .82rem; font-weight: 500;
}
.status-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: #2fbf71; box-shadow: 0 0 0 4px rgba(47, 191, 113, 0.18);
  flex-shrink: 0;
}
@media (prefers-reduced-motion: no-preference) {
  .status-dot { animation: status-pulse 2.4s ease-in-out infinite; }
}
@keyframes status-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(47, 191, 113, 0.30); }
  50% { box-shadow: 0 0 0 5px rgba(47, 191, 113, 0.05); }
}

.contact { list-style: none; display: flex; flex-wrap: wrap; align-items: center; gap: 8px 18px; padding: 0; margin: 0 0 22px; font-size: .92rem; }
.contact li { position: relative; display: inline-flex; align-items: center; gap: 7px; }
.contact .loc { color: var(--text-faint); }

/* Copy-email button */
.copy-email {
  border: 1px solid var(--border); background: var(--bg-soft); color: var(--text-faint);
  font-family: var(--mono); font-size: .68rem; text-transform: uppercase; letter-spacing: .04em;
  padding: 2px 8px; border-radius: 6px; cursor: pointer;
  transition: color .15s ease, border-color .15s ease, background-color .15s ease;
}
.copy-email:hover { color: var(--accent); border-color: var(--accent); }
.copy-email:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.copy-email.copied { color: var(--accent); border-color: var(--accent); }

.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-block; padding: 9px 18px; border-radius: 10px;
  border: 1px solid var(--border); color: var(--text); font-size: .92rem; font-weight: 500;
  background: var(--bg-soft); transition: all .15s ease;
}
.btn:hover { border-color: var(--accent); color: var(--text); text-decoration: none; transform: translateY(-1px); }
.btn-primary {
  background: var(--accent); color: #0a0a0f; border-color: var(--accent); font-weight: 600;
}
.btn-primary:hover { background: var(--accent-bright); border-color: var(--accent-bright); color: #0a0a0f; }

/* Metrics band */
.metrics {
  list-style: none; margin: 8px 0 0; padding: 22px 0 0;
  border-top: 1px solid var(--border-soft);
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px 20px;
}
.metrics li { display: flex; flex-direction: column; gap: 2px; }
.metric-num { font-size: 1.7rem; font-weight: 700; color: var(--text); letter-spacing: -.01em; line-height: 1.1; }
.metric-label { font-size: .82rem; color: var(--text-dim); }

/* Sections */
section { padding: 36px 0; border-top: 1px solid var(--border-soft); }
.hero { border-top: none; }
h2 {
  font-size: 1.15rem; letter-spacing: .02em; text-transform: uppercase;
  color: var(--text-faint); margin: 0 0 24px; font-weight: 600;
}
h2::before { content: "# "; color: var(--accent); font-family: var(--mono); }
.section-lead { margin: -12px 0 26px; color: var(--text-dim); }

/* Section bar: lead text + sort control */
.section-bar {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 16px 24px; flex-wrap: wrap; margin-bottom: 26px;
}
.section-bar .section-lead { margin: -12px 0 0; flex: 1 1 280px; }
.sort-control { display: inline-flex; align-items: center; gap: 6px; flex-shrink: 0; }
.sort-label {
  font-family: var(--mono); font-size: .74rem; text-transform: uppercase;
  letter-spacing: .06em; color: var(--text-faint); margin-right: 2px;
}
.sort-btn {
  padding: 5px 12px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg-soft); color: var(--text-dim); font-size: .82rem; cursor: pointer;
  transition: color .15s ease, border-color .15s ease, background-color .15s ease;
}
.sort-btn:hover { color: var(--text); border-color: var(--accent); }
.sort-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.sort-btn.is-active {
  background: var(--accent); border-color: var(--accent); color: #0a0a0f; font-weight: 600;
}

/* Project controls: filter (left) + sort (right) */
.project-controls {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px 24px; flex-wrap: wrap; margin-bottom: 22px;
}
.filter-control { display: inline-flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.filter-btn {
  padding: 5px 12px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg-soft); color: var(--text-dim); font-size: .82rem; cursor: pointer;
  transition: color .15s ease, border-color .15s ease, background-color .15s ease;
}
.filter-btn:hover { color: var(--text); border-color: var(--accent); }
.filter-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.filter-btn.is-active {
  background: var(--accent); border-color: var(--accent); color: #0a0a0f; font-weight: 600;
}
.card.is-hidden { display: none; }
.filter-empty { color: var(--text-dim); font-size: .92rem; margin: 0 0 8px; }

/* Project tech tags */
.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; padding: 0; margin: 0 0 12px; }
.tags li {
  font-family: var(--mono); font-size: .68rem; letter-spacing: .02em;
  color: var(--text-faint); background: var(--bg-soft);
  border: 1px solid var(--border-soft); border-radius: 6px; padding: 2px 7px;
}

/* Experience */
.entry { margin-bottom: 30px; }
.entry-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.entry h3 { margin: 0; font-size: 1.08rem; color: var(--text); }
.period { font-family: var(--mono); font-size: .8rem; color: var(--text-faint); white-space: nowrap; }
.org { margin: 3px 0 10px; color: var(--accent); font-size: .92rem; font-weight: 500; }
.entry ul { margin: 0; padding-left: 18px; }
.entry li { margin: 6px 0; color: var(--text-dim); }
.entry li strong { color: var(--text); }
.earlier { color: var(--text-dim); font-size: .92rem; }
.earlier strong { color: var(--text); }

/* Project cards */
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 20px; transition: border-color .15s ease, transform .15s ease;
}
.card:hover { border-color: var(--accent); transform: translateY(-2px); }
.card-top { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.card h3 { margin: 0 0 8px; font-size: 1.02rem; }
.card h3 a { color: var(--text); }
.card h3 a:hover { color: var(--accent); }
.card p { margin: 0 0 10px; color: var(--text-dim); font-size: .92rem; }
.year { font-family: var(--mono); font-size: .76rem; color: var(--text-faint); }
.card .links { margin: 0; font-size: .85rem; display: flex; gap: 14px; flex-wrap: wrap; }

/* Skills */
.skills-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px 28px; }
.skill-block h3 { margin: 0 0 4px; font-size: .82rem; text-transform: uppercase; letter-spacing: .04em; color: var(--accent); font-weight: 600; }
.skill-block p { margin: 0; color: var(--text-dim); font-size: .92rem; }

/* Education */
.edu { list-style: none; padding: 0; margin: 0 0 16px; }
.edu li { margin: 8px 0; color: var(--text-dim); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.edu li strong { color: var(--text); }

/* FAQ */
.faq details {
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--bg-card); margin-bottom: 10px; overflow: hidden;
}
.faq summary {
  list-style: none; cursor: pointer; padding: 14px 18px;
  font-weight: 600; color: var(--text); font-size: .98rem;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  transition: color .15s ease;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; font-family: var(--mono); font-size: 1.2rem; color: var(--accent);
  flex-shrink: 0; transition: transform .2s ease;
}
.faq details[open] summary::after { content: "\2212"; } /* minus */
.faq summary:hover { color: var(--accent); }
.faq details > p { margin: 0; padding: 0 18px 16px; color: var(--text-dim); }
.faq details > p strong { color: var(--text); }

/* Footer */
.site-footer { border-top: 1px solid var(--border-soft); padding: 28px 0 48px; margin-top: 24px; }
.site-footer p { margin: 4px 0; color: var(--text-faint); font-size: .85rem; }
.site-footer .machine { font-family: var(--mono); font-size: .8rem; }

/* ---------- Responsive ---------- */

/* Tablet / small laptop */
@media (max-width: 760px) {
  .wrap { padding: 0 22px; }
  .hero { padding-top: 52px; gap: 24px; }
  .hero-text h1 { font-size: 1.95rem; }
  .site-header nav { gap: 18px; }
}

/* Large phone / portrait tablet */
@media (max-width: 620px) {
  .hero { grid-template-columns: 1fr; gap: 18px; padding-top: 40px; }
  .avatar { width: 96px; height: 96px; }
  .hero-text h1 { font-size: 1.7rem; }
  .cards, .skills-grid { grid-template-columns: 1fr; }
  .entry-head { gap: 4px; }
  .site-header nav { gap: 16px; }
}

/* Small phone */
@media (max-width: 430px) {
  .wrap { padding: 0 16px; }
  .site-header nav { gap: 12px; }
  /* Keep the CV link + theme toggle; drop in-page anchors to avoid a cramped bar */
  .site-header nav a[href^="#"] { display: none; }
  .hero-text h1 { font-size: 1.5rem; }
  .role { font-size: .95rem; }
  .cta { gap: 10px; }
  .btn { flex: 1 1 auto; text-align: center; }
  section { padding: 30px 0; }
  .period { font-size: .74rem; }
}

/* Coarse pointers (touch): disable hover-lift so taps don't feel jumpy */
@media (hover: none) {
  .card:hover, .btn:hover { transform: none; }
}

@media (max-width: 560px) {
  .metrics { grid-template-columns: repeat(2, 1fr); gap: 18px 16px; }
  .metric-num { font-size: 1.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}

/* ---------- Print: clean light page for Cmd-P / Save as PDF ---------- */
@media print {
  :root, [data-theme="light"], [data-theme="dark"] {
    --bg: #fff; --bg-soft: #fff; --bg-card: #fff;
    --text: #111; --text-dim: #333; --text-faint: #666;
    --accent: #1a3acc; --accent-bright: #1a3acc; --border: #ccc; --border-soft: #ddd;
  }
  body { background: #fff !important; color: #111; font-size: 11pt; line-height: 1.4; }
  .site-header, .cta, .copy-email, .project-controls, .filter-empty, .theme-toggle, .skip, .site-footer { display: none !important; }
  .card.is-hidden { display: block !important; }   /* show all projects when printed */
  .hero { padding-top: 0; }
  a { color: #111; text-decoration: none; }
  .card, .faq details { break-inside: avoid; border-color: #ccc; }
  .faq details { background: #fff; }
  .faq details > p { display: block !important; }   /* expand all answers when printed */
  section { border-top: 1px solid #ddd; padding: 14px 0; }
  .card:hover, .btn:hover { transform: none; }
}