:root {
  color-scheme: dark;
  --bg: #07111f;
  --bg-soft: #0b1728;
  --surface: rgba(13, 28, 48, 0.72);
  --surface-strong: #0f2036;
  --text: #eff6ff;
  --muted: #9fb0c7;
  --faint: #6f829c;
  --line: rgba(148, 163, 184, 0.18);
  --accent: #5eead4;
  --accent-strong: #2dd4bf;
  --accent-2: #7dd3fc;
  --shadow: 0 24px 70px rgba(2, 8, 23, 0.42);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --shell: 1160px;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "PingFang TC", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  font-family: var(--sans);
  color: var(--text);
  background:
    radial-gradient(circle at 14% 0%, rgba(45, 212, 191, 0.14), transparent 30rem),
    radial-gradient(circle at 92% 16%, rgba(125, 211, 252, 0.10), transparent 28rem),
    linear-gradient(180deg, #06101d 0%, var(--bg) 45%, #060e19 100%);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(to bottom, black, transparent 72%);
}

a { color: inherit; }
img { display: block; max-width: 100%; }
button, a { -webkit-tap-highlight-color: transparent; }

.shell {
  width: min(calc(100% - 40px), var(--shell));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 16px;
  z-index: 999;
  transform: translateY(-180%);
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--text);
  color: #06101d;
  text-decoration: none;
  font-weight: 800;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(148, 163, 184, 0.10);
  background: rgba(6, 16, 29, 0.74);
  backdrop-filter: blur(18px);
}

.nav-wrap {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -0.02em;
  text-decoration: none;
}
.brand span { color: var(--accent); }

.nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.nav a {
  padding: 8px 10px;
  border-radius: 10px;
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  transition: color .2s ease, background .2s ease, transform .2s ease;
}
.nav a:hover { color: var(--text); background: rgba(255,255,255,.04); }
.nav a:active { transform: translateY(1px); }
.nav .nav-cta {
  margin-left: 8px;
  padding-inline: 13px;
  color: #dffefa;
  border: 1px solid rgba(94, 234, 212, .28);
  background: rgba(45, 212, 191, .08);
}

.hero {
  min-height: calc(100vh - 70px);
  display: grid;
  grid-template-columns: minmax(0, 1.28fr) minmax(320px, .72fr);
  align-items: center;
  gap: clamp(44px, 7vw, 88px);
  padding-block: 84px 76px;
}

.eyebrow, .section-index, .profile-kicker {
  margin: 0 0 18px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow { display: flex; align-items: center; gap: 9px; }
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 6px rgba(94, 234, 212, .08), 0 0 24px rgba(94, 234, 212, .55);
}

.hero h1 {
  margin: 0;
  max-width: 820px;
  font-size: clamp(46px, 7.2vw, 86px);
  line-height: .98;
  letter-spacing: -0.055em;
  font-weight: 900;
}
.hero h1 span { color: var(--accent); }

.hero-lead {
  max-width: 720px;
  margin: 30px 0 0;
  color: #b9c8db;
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.85;
}

.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 34px; }
.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border-radius: 12px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 850;
  letter-spacing: -.01em;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button.primary {
  color: #041713;
  background: linear-gradient(135deg, #99f6e4, var(--accent));
  box-shadow: 0 14px 34px rgba(45, 212, 191, .16);
}
.button.secondary {
  color: var(--text);
  border-color: var(--line);
  background: rgba(255, 255, 255, .025);
}
.button.secondary:hover { border-color: rgba(94, 234, 212, .35); }

.quick-facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  padding: 0;
  margin: 44px 0 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.quick-facts li {
  min-width: 0;
  padding: 18px 18px 18px 0;
}
.quick-facts li + li { padding-left: 18px; border-left: 1px solid var(--line); }
.quick-facts strong, .quick-facts span { display: block; }
.quick-facts strong { font-family: var(--mono); font-size: 13px; color: var(--accent-2); }
.quick-facts span { margin-top: 3px; color: var(--muted); font-size: 13px; }

.profile-card {
  position: relative;
  overflow: hidden;
  padding: 30px;
  border: 1px solid rgba(148, 163, 184, .16);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(15, 32, 54, .86), rgba(8, 19, 34, .78));
  box-shadow: var(--shadow);
}
.profile-card::before {
  content: "";
  position: absolute;
  width: 260px;
  height: 260px;
  right: -80px;
  top: -100px;
  border-radius: 50%;
  background: rgba(45, 212, 191, .12);
  filter: blur(18px);
}
.avatar-ring {
  position: relative;
  width: fit-content;
  padding: 8px;
  border: 1px solid rgba(94, 234, 212, .30);
  border-radius: 34px;
  background: rgba(94, 234, 212, .04);
}
.avatar-ring img { width: 156px; height: 156px; object-fit: cover; border-radius: 27px; }
.profile-copy { position: relative; margin-top: 28px; }
.profile-kicker { margin-bottom: 10px; }
.profile-copy h2 { margin: 0; font-size: clamp(24px, 3vw, 34px); line-height: 1.15; letter-spacing: -.035em; }
.profile-copy p { margin: 14px 0 0; color: var(--muted); }
.terminal-line {
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: #b7c8dd;
  font-family: var(--mono);
  font-size: 12px;
}
.terminal-line > span:first-child { color: var(--accent); }
.cursor { color: var(--accent); animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.section { padding-block: 108px; }
.section + .section { border-top: 1px solid rgba(148, 163, 184, .10); }
.section-heading {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 36px;
  align-items: start;
  margin-bottom: 44px;
}
.section-heading .section-index { margin-top: 7px; }
.section-heading h2, .contact h2 {
  margin: 0;
  max-width: 800px;
  font-size: clamp(32px, 5vw, 54px);
  line-height: 1.06;
  letter-spacing: -.045em;
}
.section-heading p:not(.section-index), .contact p {
  max-width: 720px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.focus-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.focus-card, .project-card, .skill-groups article {
  border: 1px solid var(--line);
  background: rgba(11, 23, 40, .56);
  border-radius: var(--radius-md);
}
.focus-card { padding: 26px; }
.focus-card > span { font-family: var(--mono); color: var(--faint); font-size: 12px; }
.focus-card h3 { margin: 30px 0 8px; font-size: 20px; letter-spacing: -.02em; }
.focus-card p { margin: 0; color: var(--muted); font-size: 15px; }

.projects-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.project-card { min-height: 370px; padding: 28px; display: flex; flex-direction: column; }
.project-card.featured { grid-column: 1 / -1; min-height: 0; background: linear-gradient(135deg, rgba(13, 43, 58, .92), rgba(10, 26, 46, .78)); border-color: rgba(94, 234, 212, .24); }
.project-topline { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.project-number { font-family: var(--mono); font-size: 12px; color: var(--faint); }
.project-badge { font-family: var(--mono); font-size: 11px; color: #a7f3d0; border: 1px solid rgba(94, 234, 212, .24); background: rgba(94, 234, 212, .07); border-radius: 999px; padding: 5px 9px; }
.project-card h3 { margin: 34px 0 14px; font-size: clamp(24px, 3vw, 34px); line-height: 1.15; letter-spacing: -.035em; }
.project-card p { margin: 0; color: #aebfd3; }
.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 7px; margin: 24px 0 0; padding: 0; }
.tags li { padding: 5px 8px; border: 1px solid rgba(125, 211, 252, .18); background: rgba(125, 211, 252, .05); color: #c5eafe; border-radius: 8px; font-family: var(--mono); font-size: 11px; }
.project-links { display: flex; flex-wrap: wrap; gap: 16px; margin-top: auto; padding-top: 28px; }
.project-links a { color: var(--accent); font-weight: 800; text-decoration: none; }
.project-links a:hover { text-decoration: underline; text-underline-offset: 4px; }

.skill-groups { display: grid; gap: 12px; }
.skill-groups article { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 28px; padding: 24px 26px; align-items: baseline; }
.skill-groups h3 { margin: 0; color: var(--accent-2); font-size: 17px; }
.skill-groups p { margin: 0; color: #b9c8db; }

.timeline { border-top: 1px solid var(--line); }
.timeline-item { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 30px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.timeline-item time { font-family: var(--mono); color: var(--accent); font-size: 13px; }
.timeline-item div { display: flex; justify-content: space-between; gap: 20px; }
.timeline-item strong { font-size: 17px; }
.timeline-item span { color: var(--muted); text-align: right; }

.contact {
  margin-top: 40px;
  margin-bottom: 90px;
  padding: 46px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 34px;
  border: 1px solid rgba(94, 234, 212, .20);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(13, 43, 58, .92), rgba(10, 26, 46, .76));
}
.contact .section-index { margin-bottom: 12px; }
.contact .button { flex: 0 0 auto; }

.site-footer { border-top: 1px solid rgba(148, 163, 184, .10); color: var(--faint); }
.footer-inner { min-height: 84px; display: flex; justify-content: space-between; align-items: center; gap: 24px; font-size: 13px; }

:focus-visible { outline: 3px solid rgba(125, 211, 252, .85); outline-offset: 3px; }

@media (max-width: 900px) {
  .nav-wrap { align-items: flex-start; padding-block: 16px; }
  .nav { gap: 2px; }
  .nav a:not(.nav-cta) { display: none; }
  .hero { grid-template-columns: 1fr; min-height: auto; padding-block: 76px 68px; }
  .profile-card { max-width: 620px; }
  .section { padding-block: 82px; }
  .section-heading { grid-template-columns: 1fr; gap: 8px; }
  .section-heading .section-index { margin-bottom: 8px; }
  .focus-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .project-card.featured { grid-column: auto; }
  .skill-groups article { grid-template-columns: 1fr; gap: 8px; }
  .contact { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 620px) {
  .shell { width: min(calc(100% - 28px), var(--shell)); }
  .site-header { position: static; }
  .nav-wrap { min-height: 64px; align-items: center; }
  .nav .nav-cta { margin-left: 0; }
  .hero { padding-block: 58px 56px; gap: 44px; }
  .hero h1 { font-size: clamp(42px, 13.3vw, 64px); }
  .hero-lead { margin-top: 24px; font-size: 16px; }
  .hero-actions .button { width: 100%; }
  .quick-facts { grid-template-columns: 1fr; }
  .quick-facts li, .quick-facts li + li { padding: 14px 0; border-left: 0; border-top: 1px solid var(--line); }
  .quick-facts li:first-child { border-top: 0; }
  .profile-card { padding: 22px; }
  .avatar-ring img { width: 132px; height: 132px; }
  .section { padding-block: 66px; }
  .section-heading { margin-bottom: 30px; }
  .focus-card, .project-card { padding: 22px; }
  .timeline-item { grid-template-columns: 70px minmax(0, 1fr); gap: 18px; }
  .timeline-item div { display: block; }
  .timeline-item span { display: block; margin-top: 4px; text-align: left; }
  .contact { width: calc(100% - 28px); padding: 28px 22px; margin-bottom: 64px; }
  .contact .button { width: 100%; }
  .footer-inner { padding-block: 22px; display: block; }
  .footer-inner span { display: block; }
  .footer-inner span + span { margin-top: 5px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}