/* ============================================================
   Portfolio Hub — Studio index page
   Neutral gallery canvas; each demo's palette strip provides
   all the visual variety.
   ============================================================ */

/* ── Design tokens ──────────────────────────────────────── */
:root {
  --bg:         #0a0f1e;   /* navy-900, matches main site body */
  --ink:        #ffffff;   /* primary text on dark */
  --muted:      #9fb0c8;   /* muted grey-blue text */
  --line:       #1c2740;   /* borders on dark */

  --accent:     #00c4cc;   /* ClarityIntel teal */
  --accent-dim: rgba(0,196,204,0.14);  /* teal tint for chip/hover */
  --panel:      #0d1529;   /* slightly lifted panel bg */
  --card-bg:    #111d35;   /* card bg on dark */

  --container:  1200px;
  --radius:     8px;
  --radius-lg:  16px;
  --header-h:   64px;
  --transition: 0.22s ease;

  --shadow-sm:  0 1px 4px rgba(0,0,0,.06), 0 2px 8px rgba(0,0,0,.04);
  --shadow-md:  0 4px 20px rgba(0,0,0,.09), 0 1px 4px rgba(0,0,0,.05);
  --shadow-lg:  0 8px 36px rgba(0,0,0,.12), 0 2px 8px rgba(0,0,0,.06);
}

/* ── Reset ──────────────────────────────────────────────── */
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, video { display: block; max-width: 100%; height: auto; }

/* ── Container ──────────────────────────────────────────── */
.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

/* ── Header ─────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(10,15,30,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.site-header.scrolled {
  border-color: var(--line);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.wordmark {
  display: flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}
.wordmark-label {
  font-size: .75rem;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: .06em;
  text-transform: uppercase;
}
.wordmark-name {
  font-size: .85rem;
  font-weight: 600;
  color: var(--ink);
}
.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background: var(--accent);
  color: #0a0f1e;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .02em;
  border-radius: var(--radius);
  text-decoration: none;
  transition: background var(--transition), transform var(--transition);
}
.header-cta:hover { background: #00a8b0; transform: translateY(-1px); }
.header-cta:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ── Mobile nav ─────────────────────────────────────────── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}
.hamburger span {
  display: block;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }
.hamburger:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }

.mobile-nav {
  display: none;
  position: fixed;
  inset: var(--header-h) 0 0 0;
  background: var(--bg);
  z-index: 99;
  padding: 32px 24px;
  transform: translateX(100%);
  transition: transform var(--transition);
}
.mobile-nav.open { transform: translateX(0); }
.mobile-nav a {
  display: block;
  padding: 12px 0;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}
.mobile-nav a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.4);
  z-index: 98;
}
.nav-overlay.show { display: block; }

/* ── Hero ────────────────────────────────────────────────── */
.hero {
  padding: 80px 0 64px;
  border-bottom: 1px solid var(--line);
}
.hero-eyebrow {
  display: inline-block;
  margin-bottom: 16px;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--ink);
  margin-bottom: 20px;
  max-width: 640px;
}
.hero-sub {
  font-size: 1rem;
  color: var(--muted);
  max-width: 560px;
  margin-bottom: 40px;
  line-height: 1.7;
}

/* ── Filter chips ────────────────────────────────────────── */
.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 100px;
  font-size: .8rem;
  font-weight: 500;
  color: var(--muted);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.filter-chip:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--ink);
}
.filter-chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #0a0f1e;
}
.filter-chip:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.chip-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 18px;
  padding: 0 5px;
  background: rgba(255,255,255,.2);
  border-radius: 100px;
  font-size: .68rem;
  font-weight: 700;
  line-height: 1;
}
.filter-chip:not(.active) .chip-count {
  background: var(--line);
  color: var(--ink);
}

/* ── Grid section ────────────────────────────────────────── */
#grid {
  padding-block: 64px 96px;
}
.grid-status {
  font-size: .8rem;
  color: var(--muted);
  margin-bottom: 32px;
  min-height: 1.2em;
}
.demo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* ── Demo card ───────────────────────────────────────────── */
.demo-card {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.demo-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.demo-card.hidden { display: none; }

/* Palette strip */
.card-palette {
  display: flex;
  height: 48px;
  flex-shrink: 0;
}
.card-palette span {
  flex: 1;
  display: block;
}

/* Card body */
.card-body {
  padding: 20px 20px 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.card-category {
  display: inline-block;
  margin-bottom: 8px;
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
}
.card-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
  line-height: 1.3;
}
.card-blurb {
  font-size: .82rem;
  color: var(--muted);
  line-height: 1.55;
  margin-bottom: 14px;
  flex: 1;
}
.card-feature {
  font-size: .72rem;
  color: var(--ink);
  font-weight: 500;
  margin-bottom: 18px;
  opacity: .55;
  font-variant-numeric: tabular-nums;
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: .78rem;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  align-self: flex-start;
}
.card-link:hover {
  background: var(--accent);
  color: #0a0f1e;
  border-color: var(--accent);
}
.card-link:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ── Stack note band ─────────────────────────────────────── */
.stack-band {
  background: var(--panel);
  border-block: 1px solid var(--line);
  padding-block: 32px;
  text-align: center;
}
.stack-band p {
  font-size: .9rem;
  color: var(--muted);
  max-width: 560px;
  margin-inline: auto;
  line-height: 1.7;
}
.stack-band strong {
  color: var(--ink);
  font-weight: 600;
}

/* ── CTA band ────────────────────────────────────────────── */
.cta-band {
  padding-block: 96px;
  text-align: center;
}
.cta-band h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--ink);
  margin-bottom: 12px;
}
.cta-band p {
  color: var(--muted);
  margin-bottom: 32px;
  font-size: .95rem;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--accent);
  color: var(--ink);
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: .01em;
  border-radius: var(--radius);
  text-decoration: none;
  transition: filter var(--transition), transform var(--transition);
}
.btn-primary:hover { filter: brightness(1.08); transform: translateY(-2px); }
.btn-primary:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

/* ── Footer ──────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--line);
  padding-block: 40px;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-identity {
  font-size: .8rem;
  font-weight: 700;
  color: var(--ink);
}
.footer-links {
  display: flex;
  gap: 20px;
  list-style: none;
}
.footer-links a {
  font-size: .78rem;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--ink); }
.footer-links a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.footer-note {
  width: 100%;
  font-size: .72rem;
  color: var(--muted);
  margin-top: 8px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

/* ── Scroll reveal ───────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .5s ease, transform .5s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ── Reduced motion ──────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ── Breakpoints ─────────────────────────────────────────── */
@media (max-width: 1024px) {
  .demo-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .hero { padding: 56px 0 48px; }
  #grid { padding-block: 48px 72px; }
  .cta-band { padding-block: 72px; }
  .hamburger { display: flex; }
  .header-cta { display: none; }
  .mobile-nav { display: block; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
  .demo-grid { grid-template-columns: 1fr; }
  .filter-row { gap: 6px; }
  .filter-chip { padding: 6px 12px; font-size: .75rem; }
}