:root {
  --ink: #12161c;
  --ink-2: #1b222c;
  --panel: #1f2833;
  --line: rgba(232, 220, 196, 0.14);
  --paper: #f3ebe0;
  --muted: #a9b0ba;
  --brass: #d4a574;
  --brass-deep: #b8844a;
  --teal: #6f9e98;
  --danger: #c96b6b;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --radius: 14px;
  --font-display: "Noto Serif SC", "Songti SC", serif;
  --font-body: "Source Sans 3", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--paper);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(212, 165, 116, 0.16), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, rgba(111, 158, 152, 0.12), transparent 50%),
    linear-gradient(180deg, #0e1217 0%, var(--ink) 40%, #0b0f14 100%);
  font-family: var(--font-body);
  line-height: 1.65;
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  opacity: 0.045;
  z-index: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.grid-bg {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 75%);
  opacity: 0.35;
}

.topbar,
main,
.footer {
  position: relative;
  z-index: 1;
}

.topbar {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.9rem clamp(1rem, 4vw, 3rem);
  backdrop-filter: blur(14px);
  background: rgba(14, 18, 23, 0.72);
  border-bottom: 1px solid var(--line);
  z-index: 20;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.55rem;
  text-decoration: none;
  color: inherit;
  min-width: max-content;
}

.brand-mark {
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--brass), var(--teal));
  box-shadow: 0 0 0 3px rgba(212, 165, 116, 0.18);
  transform: translateY(1px);
}

.brand-mark.sm {
  width: 0.7rem;
  height: 0.7rem;
}

.brand-text {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--brass);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  margin-left: auto;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

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

.btn {
  appearance: none;
  border: none;
  cursor: pointer;
  font: inherit;
  font-weight: 600;
  border-radius: 999px;
  padding: 0.65rem 1.15rem;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, var(--brass), var(--brass-deep));
  color: #1a120a;
}

.btn-line {
  background: transparent;
  color: var(--paper);
  border: 1px solid var(--line);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  color: var(--paper);
  border: 1px solid transparent;
}

.btn-block {
  width: 100%;
  margin-top: 1rem;
}

.hero {
  padding: clamp(3rem, 8vw, 6.5rem) clamp(1rem, 4vw, 3rem) 2rem;
  max-width: 1100px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
  margin: 0 0 1rem;
}

.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.4rem, 6vw, 4.4rem);
  line-height: 1.15;
  letter-spacing: 0.02em;
}

.hero h1 em {
  font-style: normal;
  color: var(--brass);
}

.lede {
  max-width: 38rem;
  color: var(--muted);
  font-size: 1.08rem;
  margin: 1.4rem 0 1.8rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  max-width: 28rem;
  margin: 0;
}

.stats div {
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(31, 40, 51, 0.55);
}

.stats dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.stats dd {
  margin: 0.25rem 0 0;
  font-family: var(--font-display);
  font-size: 1.55rem;
}

.section {
  padding: 2.5rem clamp(1rem, 4vw, 3rem) 1rem;
  max-width: 1100px;
  margin: 0 auto;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem 2rem;
  justify-content: space-between;
  align-items: end;
  margin-bottom: 1.5rem;
}

.section h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  margin: 0 0 0.4rem;
}

.section-head p,
.muted {
  color: var(--muted);
  margin: 0;
}

.toolbar {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-width: min(100%, 360px);
}

.search input,
.form-grid input,
.form-grid select,
.form-grid textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(18, 22, 28, 0.8);
  color: var(--paper);
  border-radius: 12px;
  padding: 0.75rem 0.95rem;
  font: inherit;
  outline: none;
}

.search input:focus,
.form-grid input:focus,
.form-grid select:focus,
.form-grid textarea:focus {
  border-color: rgba(212, 165, 116, 0.55);
  box-shadow: 0 0 0 3px rgba(212, 165, 116, 0.12);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.chip {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.18s ease;
}

.chip:hover,
.chip.active {
  color: #1a120a;
  background: var(--brass);
  border-color: var(--brass);
}

.skill-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}

.skill-card {
  text-align: left;
  border: 1px solid var(--line);
  background: linear-gradient(165deg, rgba(31, 40, 51, 0.9), rgba(18, 22, 28, 0.75));
  border-radius: var(--radius);
  padding: 1.15rem 1.2rem 1.25rem;
  color: inherit;
  cursor: pointer;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.skill-card:hover {
  border-color: rgba(212, 165, 116, 0.45);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.skill-card .cat {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--teal);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 0.55rem;
}

.skill-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin: 0 0 0.5rem;
}

.skill-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.skill-card .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.9rem;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--brass);
  border: 1px solid rgba(212, 165, 116, 0.28);
  border-radius: 999px;
  padding: 0.15rem 0.5rem;
}

.empty {
  color: var(--muted);
  text-align: center;
  padding: 2rem 1rem;
}

.split {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

.steps {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
  counter-reset: step;
}

.steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.35rem 0.9rem;
  padding: 1rem 0;
  border-top: 1px solid var(--line);
}

.steps li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono);
  color: var(--brass);
  grid-row: span 2;
  align-self: start;
  padding-top: 0.15rem;
}

.steps strong {
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.steps span {
  color: var(--muted);
  grid-column: 2;
}

.panel {
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  padding: 1.4rem 1.35rem;
  background: rgba(31, 40, 51, 0.65);
}

.panel h3 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
}

.panel ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

.panel li + li {
  margin-top: 0.45rem;
}

.about-card {
  border-left: 3px solid var(--brass);
  padding: 0.2rem 0 0.2rem 1.25rem;
  max-width: 52rem;
}

.about-card p {
  color: var(--muted);
  margin: 0 0 1rem;
}

.about-card p:last-child {
  margin-bottom: 0;
}

.accordion details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(31, 40, 51, 0.45);
  padding: 0.2rem 1rem;
  margin-bottom: 0.65rem;
}

.accordion summary {
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 1.05rem;
  padding: 0.85rem 0;
  list-style: none;
}

.accordion summary::-webkit-details-marker {
  display: none;
}

.accordion summary::after {
  content: "+";
  float: right;
  font-family: var(--font-mono);
  color: var(--brass);
}

.accordion details[open] summary::after {
  content: "−";
}

.accordion p {
  color: var(--muted);
  margin: 0 0 1rem;
}

.footer {
  margin-top: 3.5rem;
  padding: 2rem clamp(1rem, 4vw, 3rem) 2.5rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: space-between;
  align-items: center;
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-brand strong {
  display: block;
  color: var(--paper);
  font-family: var(--font-display);
}

.footer-brand p,
.footer-note {
  margin: 0.15rem 0 0;
}

.modal {
  border: none;
  padding: 0;
  background: transparent;
  max-width: min(560px, calc(100vw - 2rem));
  color: var(--paper);
}

.modal::backdrop {
  background: rgba(6, 8, 11, 0.72);
  backdrop-filter: blur(4px);
}

.modal-card {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 6px);
  background: var(--ink-2);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.modal-card > header,
.modal-actions {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1.15rem 1.25rem;
  border-bottom: 1px solid var(--line);
}

.modal-actions {
  border-bottom: none;
  border-top: 1px solid var(--line);
  justify-content: flex-end;
  align-items: center;
}

.modal-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--teal);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.modal-card h3 {
  margin: 0.2rem 0 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
  flex: 1;
}

.modal-card > header {
  flex-wrap: wrap;
}

.modal-card > header .icon-close {
  margin-left: auto;
}

.modal-body {
  padding: 1.15rem 1.25rem 1.35rem;
}

.modal-body > p {
  color: var(--muted);
  margin: 0 0 1rem;
}

.snippet {
  margin: 0;
  padding: 0.9rem 1rem;
  border-radius: 10px;
  background: #0b0f14;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  white-space: pre-wrap;
  color: #e8dcc4;
  overflow: auto;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 1rem;
}

.icon-close {
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  padding: 0 0.2rem;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}

.form-grid label {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.88rem;
  color: var(--muted);
}

.form-grid .full {
  grid-column: 1 / -1;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  transform: translateX(-50%) translateY(120%);
  z-index: 40;
  background: var(--panel);
  border: 1px solid rgba(212, 165, 116, 0.4);
  color: var(--paper);
  padding: 0.75rem 1.2rem;
  border-radius: 999px;
  box-shadow: var(--shadow);
  transition: transform 0.25s ease;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  animation: rise 0.7s ease forwards;
}

.delay-1 { animation-delay: 0.08s; }
.delay-2 { animation-delay: 0.16s; }
.delay-3 { animation-delay: 0.24s; }
.delay-4 { animation-delay: 0.32s; }

@keyframes rise {
  to {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 800px) {
  .topbar {
    flex-wrap: wrap;
  }

  .nav {
    order: 3;
    width: 100%;
    margin-left: 0;
  }

  .split,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .stats {
    grid-template-columns: 1fr;
  }
}