/* ===== Design tokens ===== */
:root {
  --bg: #0b0b0c;
  --bg-raised: #131316;
  --bg-card: #101012;
  --border: #2a2a2e;
  --border-strong: #47474d;
  --text: #d7d7da;
  --text-dim: #8d8d93;
  --text-bright: #f5f5f6;
  --accent: #e2a640;
  --accent-dim: #a97b34;
  --accent-bg: rgba(226, 166, 64, 0.08);
  --mono: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, 'Liberation Mono', monospace;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --max-width: 1120px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
}

/* ===== Reset ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

@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;
  }
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
}

img { display: block; max-width: 100%; }

a { color: inherit; }

.mono { font-family: var(--mono); }

/* ===== Skip link ===== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--accent);
  color: #0b0b0c;
  padding: 0.6rem 1rem;
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 700;
  z-index: 100;
  text-decoration: none;
}
.skip-link:focus {
  top: 0;
}

/* ===== Focus states ===== */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(11, 11, 12, 0.92);
  backdrop-filter: none;
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
}

.brand {
  text-decoration: none;
  display: flex;
  align-items: center;
}

.brand-logo {
  height: 52px;
  width: auto;
  display: block;
  filter: brightness(0) invert(1);
}

.site-nav {
  display: flex;
  gap: 1.5rem;
  order: 3;
  flex-basis: 100%;
}

@media (min-width: 640px) {
  .site-nav { order: 0; flex-basis: auto; }
}

.site-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  color: var(--text-dim);
  transition: color 0.15s ease;
}
.site-nav a:hover { color: var(--text-bright); }

.lang-switch {
  display: flex;
  border: 1px solid var(--border);
}

.lang-switch button {
  background: none;
  border: none;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 0.35rem 0.6rem;
  cursor: pointer;
  border-left: 1px solid var(--border);
  transition: color 0.15s ease, background 0.15s ease;
}
.lang-switch button:first-child { border-left: none; }
.lang-switch button:hover { color: var(--text-bright); }
.lang-switch button[aria-pressed="true"] {
  color: var(--accent);
  background: var(--accent-bg);
}

/* ===== Section shell ===== */
main { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--gutter); }

section { padding: clamp(3rem, 8vw, 5.5rem) 0; }

.index-label {
  color: var(--accent);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
}

.section-heading h2 {
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  color: var(--text-bright);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.section-sub {
  color: var(--text-dim);
  max-width: 46ch;
}

/* ===== Intro ===== */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

@media (min-width: 900px) {
  .intro-grid {
    grid-template-columns: minmax(0, 1fr) 320px;
    align-items: start;
    gap: 3.5rem;
  }
}

.intro-main h1 {
  font-size: clamp(2rem, 5.5vw, 3.2rem);
  font-weight: 700;
  color: var(--text-bright);
  line-height: 1.1;
  margin-bottom: 0.6rem;
}

.hero-role {
  color: var(--accent);
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  margin-bottom: 1.75rem;
}

.intro-text {
  max-width: 62ch;
  color: var(--text);
  margin-bottom: 1.25rem;
}

.about-text {
  max-width: 62ch;
  color: var(--text-dim);
}

.facts-panel {
  border: 1px solid var(--border);
  background: var(--bg-raised);
}

.facts-panel dl { display: block; }

.facts-row {
  padding: 0.9rem 1.1rem;
  border-bottom: 1px solid var(--border);
}
.facts-row:last-child { border-bottom: none; }

.facts-row dt {
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  margin-bottom: 0.35rem;
}

.facts-row dd {
  font-size: 0.85rem;
  color: var(--text);
  line-height: 1.5;
}

.facts-status {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--accent);
}

.facts-status::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  box-shadow: 0 0 0 3px var(--accent-bg);
}

/* ===== Filters ===== */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.75rem 0 2.25rem;
}

.filter-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  padding: 0.5rem 0.85rem;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.filter-btn:hover {
  color: var(--text-bright);
  border-color: var(--border-strong);
}

.filter-btn[aria-pressed="true"] {
  color: var(--accent);
  border-color: var(--accent-dim);
  background: var(--accent-bg);
}

/* ===== Projects grid ===== */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1000px) {
  .projects-grid { grid-template-columns: repeat(3, 1fr); }
}

.project-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  background: var(--bg-card);
  transition: border-color 0.18s ease;
  animation: card-in 0.35s ease both;
}

.project-card:hover,
.project-card:focus-within {
  border-color: var(--accent-dim);
}

@keyframes card-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.project-card.is-hidden { display: none; }

.card-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 1rem 1.1rem 0;
}

.card-index {
  color: var(--text-dim);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
}

.card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: flex-end;
}

.card-badge {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 0.15rem 0.4rem;
  text-transform: uppercase;
  white-space: nowrap;
}

.card-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-bright);
  padding: 0.6rem 1.1rem 0.15rem;
}

.card-hook {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 0 1.1rem 0.85rem;
}

.card-image-wrap {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  height: 190px;
  overflow: hidden;
  background: var(--bg-raised);
}

.card-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.card-desc {
  padding: 1.1rem;
  color: var(--text-dim);
  font-size: 0.92rem;
  line-height: 1.65;
}

.card-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0 1.1rem 1.1rem;
}

.tech-tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 0.15rem 0.4rem;
}

.card-links {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0 1.25rem;
  padding: 0.9rem 1.1rem;
  border-top: 1px solid var(--border);
}

.card-links a {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.card-links a::after {
  content: "\2192";
  transition: transform 0.15s ease;
}

.card-links a:hover {
  color: var(--accent);
}
.card-links a:hover::after {
  transform: translateX(2px);
}

/* ===== Contact ===== */
.contact-panel {
  border: 1px solid var(--border);
  background: var(--bg-raised);
  max-width: 620px;
}

.contact-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.contact-row:last-child { border-bottom: none; }

.contact-row dt {
  color: var(--text-dim);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}

.contact-row dd a {
  color: var(--text-bright);
  text-decoration: none;
  font-size: 0.95rem;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.contact-row dd a:hover {
  color: var(--accent);
  border-color: var(--accent-dim);
}

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem var(--gutter);
  display: flex;
  justify-content: center;
  color: var(--text-dim);
  font-size: 0.78rem;
}