/* ═══════════════════════════════════════════════════════════
   PivoHub Generative Storefronts — Portal
   Demo concept: AI-generated brand front-ends on PivoHub backend
   ═══════════════════════════════════════════════════════════ */

:root {
  --ink: #0c1222;
  --ink-soft: #1a2332;
  --slate: #5c6b7a;
  --mist: #e8edf2;
  --snow: #f7f9fb;
  --white: #ffffff;
  --accent: #00c2a8;
  --accent-deep: #009e8a;
  --gold: #c9a227;
  --border: rgba(12, 18, 34, 0.08);
  --shadow: 0 20px 50px rgba(12, 18, 34, 0.08);
  --radius: 16px;
  --font: "DM Sans", system-ui, -apple-system, sans-serif;
  --display: "Fraunces", Georgia, serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--snow);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ─── Top bar ─── */
.demo-banner {
  background: var(--ink);
  color: rgba(255,255,255,0.85);
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  text-align: center;
  padding: 0.55rem 1rem;
}
.demo-banner strong { color: var(--accent); font-weight: 600; }
.demo-banner a { color: #fff; text-decoration: underline; text-underline-offset: 2px; }

/* ─── Nav ─── */
.portal-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 2rem;
  max-width: 1280px;
  margin: 0 auto;
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 249, 251, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
}
.portal-nav.scrolled { border-bottom-color: var(--border); }

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}
.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), #3b82f6);
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
}
.logo span { color: var(--slate); font-weight: 500; font-size: 0.9rem; }

.nav-links {
  display: flex;
  gap: 1.75rem;
  font-size: 0.9rem;
  color: var(--slate);
}
.nav-links a:hover { color: var(--ink); }
.nav-cta {
  background: var(--ink);
  color: #fff !important;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: transform 0.15s, background 0.15s;
}
.nav-cta:hover { background: var(--ink-soft); transform: translateY(-1px); }

/* ─── Hero ─── */
.hero {
  max-width: 1280px;
  margin: 0 auto;
  padding: 4rem 2rem 3.5rem;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-deep);
  margin-bottom: 1.25rem;
}
.hero-eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(0, 194, 168, 0.2);
}

.hero h1 {
  font-family: var(--display);
  font-size: clamp(2.4rem, 4.5vw, 3.6rem);
  font-weight: 550;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}
.hero h1 em {
  font-style: italic;
  color: var(--accent-deep);
}

.hero-lead {
  font-size: 1.1rem;
  color: var(--slate);
  max-width: 36rem;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 2.5rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.85rem 1.35rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--ink);
  color: #fff;
  box-shadow: 0 8px 24px rgba(12, 18, 34, 0.2);
}
.btn-ghost {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--border);
}

.hero-meta {
  display: flex;
  gap: 2rem;
  font-size: 0.85rem;
  color: var(--slate);
}
.hero-meta strong {
  display: block;
  font-size: 1.35rem;
  color: var(--ink);
  font-family: var(--display);
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* Hero visual */
.hero-visual {
  position: relative;
  min-height: 380px;
}
.stack-card {
  position: absolute;
  border-radius: 14px;
  background: #fff;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: transform 0.3s ease;
}
.stack-card:hover { transform: translateY(-4px) scale(1.02); z-index: 5 !important; }
.stack-card .swatch {
  height: 72px;
  display: flex;
  align-items: flex-end;
  padding: 0.6rem 0.85rem;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.9);
}
.stack-card .body {
  padding: 0.75rem 0.9rem 0.9rem;
}
.stack-card .body h4 {
  font-size: 0.88rem;
  font-weight: 650;
  margin-bottom: 0.15rem;
}
.stack-card .body p {
  font-size: 0.75rem;
  color: var(--slate);
}
.sc-1 { width: 200px; top: 10%; left: 5%; z-index: 3; transform: rotate(-6deg); }
.sc-2 { width: 210px; top: 28%; right: 8%; z-index: 4; transform: rotate(4deg); }
.sc-3 { width: 190px; bottom: 18%; left: 18%; z-index: 2; transform: rotate(2deg); }
.sc-4 { width: 175px; bottom: 8%; right: 18%; z-index: 3; transform: rotate(-3deg); }
.sc-5 { width: 160px; top: 55%; left: 42%; z-index: 1; transform: rotate(8deg); opacity: 0.9; }

.api-chip {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: #a7f3d0;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.7rem;
  padding: 0.45rem 0.9rem;
  border-radius: 8px;
  white-space: nowrap;
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
}
.api-chip span { color: #94a3b8; }

/* ─── Concept strip ─── */
.concept {
  background: var(--ink);
  color: #fff;
  padding: 3.5rem 2rem;
}
.concept-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.concept-step {
  padding: 0.5rem 0;
}
.concept-num {
  font-family: var(--display);
  font-size: 2rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 0.75rem;
  opacity: 0.9;
}
.concept-step h3 {
  font-size: 1.1rem;
  font-weight: 650;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}
.concept-step p {
  font-size: 0.92rem;
  color: rgba(255,255,255,0.65);
  line-height: 1.55;
}
.concept-step code {
  font-family: ui-monospace, Menlo, monospace;
  font-size: 0.8em;
  background: rgba(255,255,255,0.08);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  color: #a7f3d0;
}

/* ─── Brands section ─── */
.brands-section {
  max-width: 1280px;
  margin: 0 auto;
  padding: 4.5rem 2rem 3rem;
}
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}
.section-head h2 {
  font-family: var(--display);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 550;
  letter-spacing: -0.02em;
}
.section-head p {
  color: var(--slate);
  max-width: 28rem;
  font-size: 0.98rem;
}

.brand-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.brand-card {
  background: #fff;
  border-radius: 20px;
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  position: relative;
}
.brand-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 48px rgba(12, 18, 34, 0.1);
}
.brand-card-hero {
  height: 160px;
  position: relative;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.brand-card-hero .tag {
  align-self: flex-start;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.18);
  color: #fff;
  backdrop-filter: blur(6px);
}
.brand-card-hero .wordmark {
  font-family: var(--display);
  font-size: 1.55rem;
  font-weight: 550;
  color: #fff;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 12px rgba(0,0,0,0.2);
}
.brand-card-body {
  padding: 1.35rem 1.4rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.brand-card-body .region {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--slate);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.45rem;
}
.brand-card-body h3 {
  font-size: 1.15rem;
  font-weight: 650;
  margin-bottom: 0.45rem;
  letter-spacing: -0.01em;
}
.brand-card-body .blurb {
  font-size: 0.9rem;
  color: var(--slate);
  flex: 1;
  margin-bottom: 1.15rem;
}
.brand-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.82rem;
}
.brand-card-meta .sku {
  color: var(--slate);
}
.brand-card-meta .sku strong { color: var(--ink); }
.enter-link {
  font-weight: 650;
  color: var(--accent-deep);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}
.enter-link::after { content: "→"; transition: transform 0.15s; }
.brand-card:hover .enter-link::after { transform: translateX(3px); }

/* Palette dots */
.palette {
  display: flex;
  gap: 0.3rem;
  margin-bottom: 0.85rem;
}
.palette i {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid rgba(0,0,0,0.08);
}

/* ─── Architecture ─── */
.arch {
  max-width: 1100px;
  margin: 0 auto 4rem;
  padding: 0 2rem;
}
.arch-box {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2rem 2.25rem;
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 1rem;
  align-items: center;
}
.arch-node {
  text-align: center;
  padding: 1.25rem 1rem;
  border-radius: 14px;
  background: var(--snow);
  border: 1px dashed var(--border);
}
.arch-node.highlight {
  background: linear-gradient(160deg, #ecfdf8, #e0f2fe);
  border-style: solid;
  border-color: rgba(0, 194, 168, 0.35);
}
.arch-node .label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--slate);
  margin-bottom: 0.4rem;
}
.arch-node h4 {
  font-size: 0.98rem;
  font-weight: 650;
  margin-bottom: 0.35rem;
}
.arch-node p {
  font-size: 0.78rem;
  color: var(--slate);
  line-height: 1.4;
}
.arch-arrow {
  font-size: 1.4rem;
  color: var(--accent);
  font-weight: 300;
}

/* ─── Footer ─── */
.portal-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 2rem;
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.5rem;
  font-size: 0.85rem;
  color: var(--slate);
}
.portal-footer strong { color: var(--ink); }
.portal-footer a { text-decoration: underline; text-underline-offset: 2px; }

/* ─── Responsive ─── */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-top: 2.5rem; }
  .hero-visual { min-height: 300px; order: -1; }
  .concept-inner { grid-template-columns: 1fr; gap: 1.75rem; }
  .arch-box {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }
  .arch-arrow { transform: rotate(90deg); text-align: center; }
  .nav-links { display: none; }
}

@media (max-width: 560px) {
  .portal-nav { padding: 1rem; }
  .hero { padding: 2rem 1.25rem; }
  .brands-section { padding: 3rem 1.25rem; }
  .sc-5 { display: none; }
}