/* ---------- Design tokens ---------- */
:root {
  color-scheme: dark;
  --bg: #0b0f17;
  --bg-elev: #121826;
  --bg-elev-2: #172033;
  --surface-border: rgba(255, 255, 255, 0.08);
  --text: #e8ecf4;
  --text-muted: #98a4bb;
  --accent: #4f8cff;
  --accent-2: #22d3ee;
  --danger: #ff6b6b;
  --ok: #34d399;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.45);
  --maxw: 1600px;
  --font: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --mono: "Cascadia Code", "SF Mono", Consolas, monospace;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f6f8fc;
  --bg-elev: #ffffff;
  --bg-elev-2: #eef2f9;
  --surface-border: rgba(15, 23, 42, 0.10);
  --text: #101828;
  --text-muted: #55607a;
  --shadow: 0 10px 30px rgba(16, 24, 40, 0.10);
}

* { box-sizing: border-box; }

html { height: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: inherit; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 12px 18px;
  z-index: 100;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }

/* ---------- Ambient background ---------- */
.aurora {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}
.aurora span {
  position: absolute;
  display: block;
  width: 44vw;
  height: 44vw;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.30;
  animation: drift 22s ease-in-out infinite alternate;
}
.aurora span:nth-child(1) { background: var(--accent);   top: -12vw; left: -8vw; }
.aurora span:nth-child(2) { background: var(--accent-2); bottom: -16vw; right: -6vw; animation-delay: -8s; }
.aurora span:nth-child(3) { background: #a855f7; top: 34%; left: 52%; animation-delay: -14s; }

@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(3vw, 4vh, 0) scale(1.18); }
}

/* ---------- Layout shell ---------- */
.shell {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 56px);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--bg-elev); /* ← add: solid fallback if color-mix()/backdrop-filter aren't supported */
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px); /* ← add: Safari needs the prefix */
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--surface-border);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 68px;
}
.brand {
  font-weight: 700;
  letter-spacing: -0.02em;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.brand-dot {
  width: 12px; height: 12px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 16px var(--accent);
}
.site-nav { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.site-nav a {
  padding: 8px 14px;
  border-radius: 999px;
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.92rem;
  transition: background 0.2s, color 0.2s;
}
.site-nav a:hover { color: var(--text); background: var(--bg-elev-2); }

.icon-btn {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 1px solid var(--surface-border);
  background: var(--bg-elev);
  color: var(--text);
  cursor: pointer;
  font-size: 1rem;
  transition: transform 0.15s, background 0.2s;
}
.icon-btn:hover { transform: translateY(-1px); background: var(--bg-elev-2); }

/* ---------- Hero ---------- */
.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(24px, 5vw, 72px);
  align-items: center;
  min-height: min(78vh, 720px);
  padding-block: clamp(40px, 8vh, 96px);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-2);
  border: 1px solid var(--surface-border);
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--bg-elev);
}
.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  line-height: 1.03;
  letter-spacing: -0.035em;
  margin: 20px 0 18px;
}
.hero h1 .grad {
  background: linear-gradient(120deg, var(--accent), var(--accent-2) 60%, #a855f7);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p.lede {
  font-size: clamp(1rem, 1.35vw, 1.2rem);
  color: var(--text-muted);
  max-width: 62ch;
  line-height: 1.65;
  margin: 0 0 30px;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 13px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
}
.btn-primary {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #06101f;
  box-shadow: 0 8px 26px rgba(79, 140, 255, 0.36);
}
.btn-primary:hover { transform: translateY(-2px); }
.btn-ghost {
  background: var(--bg-elev);
  border-color: var(--surface-border);
  color: var(--text);
}
.btn-ghost:hover { background: var(--bg-elev-2); transform: translateY(-2px); }

/* Architecture panel */
.arch-card {
  background: var(--bg-elev);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 26px;
  box-shadow: var(--shadow);
}
.arch-card h2 { margin: 0 0 4px; font-size: 1rem; letter-spacing: -0.01em; }
.arch-card .sub { margin: 0 0 18px; color: var(--text-muted); font-size: 0.85rem; }
.arch-flow { display: grid; gap: 10px; }
.arch-node {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius);
  background: var(--bg-elev-2);
  border: 1px solid var(--surface-border);
  font-size: 0.88rem;
}
.arch-node .tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent-2);
  margin-left: auto;
}
.arch-arrow { justify-self: center; color: var(--text-muted); font-size: 0.9rem; }

/* ---------- Section furniture ---------- */
.section { padding-block: clamp(48px, 9vh, 104px); }
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}
.section-head h2 {
  font-size: clamp(1.7rem, 3.2vw, 2.5rem);
  letter-spacing: -0.03em;
  margin: 0;
}
.section-head p { margin: 8px 0 0; color: var(--text-muted); max-width: 60ch; }

/* ---------- Toolbar ---------- */
.toolbar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 26px;
}
.search-wrap { position: relative; flex: 1 1 280px; max-width: 420px; }
.search-wrap input {
  width: 100%;
  padding: 12px 16px 12px 40px;
  border-radius: 999px;
  border: 1px solid var(--surface-border);
  background: var(--bg-elev);
  color: var(--text);
  font-size: 0.93rem;
  font-family: inherit;
}
.search-wrap input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
.search-wrap::before {
  content: "⌕";
  position: absolute;
  left: 16px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1.1rem;
}
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--surface-border);
  background: var(--bg-elev);
  color: var(--text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.18s;
}
.chip:hover { color: var(--text); }
.chip[aria-pressed="true"] {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #06101f;
  border-color: transparent;
  font-weight: 600;
}
.result-count { margin-left: auto; color: var(--text-muted); font-size: 0.85rem; }

/* ---------- Project grid ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: clamp(16px, 2vw, 28px);
}
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--bg-elev);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s;
  animation: rise 0.45s ease backwards;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
}
@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}
.card-media {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--bg-elev-2), var(--bg-elev));
  position: relative;
  overflow: hidden;
}
.card-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}
.card:hover .card-media img { transform: scale(1.05); }
.card-media .fallback {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  font-size: 2.2rem;
  color: var(--text-muted);
  font-family: var(--mono);
}
.card-body { padding: 20px 22px 22px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.card-body h3 { margin: 0; font-size: 1.12rem; letter-spacing: -0.015em; }
.card-body p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.tag-row { display: flex; gap: 6px; flex-wrap: wrap; margin-top: auto; padding-top: 6px; }
.tag {
  font-size: 0.72rem;
  font-family: var(--mono);
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--bg-elev-2);
  border: 1px solid var(--surface-border);
  color: var(--accent-2);
}
.card-link {
  position: absolute;
  inset: 0;
  text-indent: -9999px;
  overflow: hidden;
}
.card-link:focus-visible { outline: 3px solid var(--accent); outline-offset: -3px; }

/* ---------- Skeleton ---------- */
.skeleton .card-media,
.skeleton .sk-line {
  background: linear-gradient(90deg, var(--bg-elev-2) 25%, var(--bg-elev) 50%, var(--bg-elev-2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.3s linear infinite;
}
.sk-line { height: 12px; border-radius: 6px; }
.sk-line.w60 { width: 60%; }
.sk-line.w90 { width: 90%; }
.sk-line.w40 { width: 40%; }
@keyframes shimmer {
  from { background-position: 200% 0; }
  to   { background-position: -200% 0; }
}

/* ---------- States ---------- */
.state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 64px 24px;
  border: 1px dashed var(--surface-border);
  border-radius: var(--radius-lg);
  background: var(--bg-elev);
}
.state h3 { margin: 0 0 8px; font-size: 1.25rem; }
.state p { margin: 0 auto 20px; color: var(--text-muted); max-width: 52ch; line-height: 1.6; }
.state .spinner {
  width: 34px; height: 34px;
  border: 3px solid var(--surface-border);
  border-top-color: var(--accent);
  border-radius: 50%;
  margin: 0 auto 18px;
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Status bar ---------- */
.status-strip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 18px;
  border-radius: 999px;
  background: var(--bg-elev);
  border: 1px solid var(--surface-border);
  font-size: 0.84rem;
  color: var(--text-muted);
  width: fit-content;
}
.dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--text-muted);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--text-muted) 20%, transparent);
}
.dot.up   { background: var(--ok);     box-shadow: 0 0 0 4px color-mix(in srgb, var(--ok) 22%, transparent); }
.dot.down { background: var(--danger); box-shadow: 0 0 0 4px color-mix(in srgb, var(--danger) 22%, transparent); }
.dot.warm { background: #fbbf24;       box-shadow: 0 0 0 4px rgba(251, 191, 36, 0.22); }

.badge {
  align-self: flex-start;
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  color: var(--accent);
}

/* ---------- Footer ---------- */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--surface-border);
  padding-block: 34px;
  color: var(--text-muted);
  font-size: 0.87rem;
}
.footer-inner { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; align-items: center; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .site-nav a:not(.btn) { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}