/* ── LAYOUT ─────────────────────────────────── */

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
  min-height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo {
  display: block;
  height: 36px;
  width: auto;
  max-width: 154px;
  transition: transform var(--dur-micro) var(--ease-out);
}
.brand:hover .brand-logo {
  transform: translateY(-1px);
}
@media (prefers-reduced-motion: reduce) {
  .brand:hover .brand-logo {
    transform: none;
  }
}

.nav-group {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}

.nav-list {
  display: flex;
  gap: var(--sp-1);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  display: inline-flex;
  padding: 7px 12px;
  border-radius: var(--r-full);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--muted);
  transition: color var(--dur-micro), background var(--dur-micro);
}
.nav-link:hover { color: var(--text); background: var(--surface-2); }
.nav-link[aria-current="page"] { color: var(--text); background: var(--surface-2); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.btn-sm {
  padding: 8px 14px;
  font-size: 0.8125rem;
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  transition: color var(--dur-micro), border-color var(--dur-micro);
  position: relative;
}
.theme-toggle:hover { color: var(--text); border-color: var(--text); }
.theme-toggle .icon-sun { display: block; }
.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

.mobile-menu-toggle {
  display: none;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: var(--r-md);
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

/* Mobile menu */
.mobile-menu {
  display: none;
  border-top: 1px solid var(--border);
  background: var(--surface);
  overflow: hidden;
}
.mobile-menu[aria-hidden="false"] { display: block; }
.mobile-menu ul { list-style: none; margin: 0; padding: var(--sp-4); display: grid; gap: var(--sp-1); }
.mobile-nav-link {
  display: block;
  padding: 10px var(--sp-4);
  border-radius: var(--r-md);
  text-decoration: none;
  font-weight: 600;
  color: var(--text);
}
.mobile-nav-link:hover { background: var(--surface-2); }
.mobile-nav-cta {
  margin-top: var(--sp-2);
  background: var(--accent);
  color: var(--accent-text);
  text-align: center;
}
.mobile-nav-cta:hover { filter: brightness(1.08); background: var(--accent); }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: var(--sp-16) 0 var(--sp-10);
  margin-top: var(--sp-20);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--sp-12);
  margin-bottom: var(--sp-10);
}

.footer-brand .brand { margin-bottom: var(--sp-4); }
.footer-tagline {
  max-width: 320px;
  color: var(--muted);
  font-size: 0.875rem;
  line-height: 1.6;
  margin: 0;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: var(--sp-10);
}

.footer-nav-col { display: flex; flex-direction: column; gap: var(--sp-4); }
.footer-nav-heading {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.footer-nav-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--sp-3); }
.footer-nav-col a {
  font-size: 0.875rem;
  text-decoration: none;
  color: var(--text);
  opacity: 0.75;
  transition: opacity var(--dur-micro);
}
.footer-nav-col a:hover { opacity: 1; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: var(--sp-4);
  padding-top: var(--sp-6);
  border-top: 1px solid var(--border);
}
.footer-legal {
  font-size: 0.8125rem;
  color: var(--muted);
  margin: 0;
}
.footer-legal a { color: inherit; text-decoration: underline; text-underline-offset: 3px; }

/* Page sections */
.section { padding: var(--sp-20) 0; }
.section-sm { padding: var(--sp-12) 0; }
.section-divider { border: 0; height: 1px; background: var(--border); margin: 0; }

/* Hero */
.hero-section {
  padding: var(--sp-16) 0 var(--sp-20);
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse 90% 80% at 75% 45%, black 45%, rgba(0,0,0,0.7) 75%, rgba(0,0,0,0.3) 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 75% 45%, black 45%, rgba(0,0,0,0.7) 75%, rgba(0,0,0,0.3) 100%);
}

.hero-inner {
  position: relative;
  z-index: 1;
}

/* Page Header & Network Background (R9) */
.page-head {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-xl);
  padding: var(--sp-10) var(--sp-8);
  margin-bottom: var(--sp-10);
  background: var(--surface);
  border: 1px solid var(--border);
}

.page-header-network-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.page-head > *:not(.page-header-network-bg) {
  position: relative;
  z-index: 1;
}

/* Template grid */
.templates-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-5);
}

/* Tier strip */
.tier-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
}
.tier-strip-item {
  background: var(--surface);
  padding: var(--sp-6) var(--sp-5);
}

/* QC grid */
.qc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-4);
}
.qc-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--sp-5);
}
.qc-icon {
  width: 32px;
  height: 32px;
  margin-bottom: var(--sp-3);
  color: var(--accent);
}

/* Custom steps */
.steps-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-8);
  position: relative;
}

/* Marquee */
.marquee-wrap {
  overflow: hidden;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: var(--sp-4) 0;
  background: var(--surface);
}
.marquee-track {
  display: flex;
  gap: var(--sp-6);
  width: max-content;
  animation: marquee 24s linear infinite;
}
.marquee-wrap:hover .marquee-track { animation-play-state: paused; }
.marquee-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}
.marquee-sep { color: var(--accent); }
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .marquee-track { animation: none; }
}

/* Scroll reveal: initial hidden state ONLY applies when JavaScript is active */
.reveal {
  opacity: 1;
  transform: none;
}
.js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--dur-enter) var(--ease-out), transform var(--dur-enter) var(--ease-out);
}
.js .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal,
  .js .reveal,
  .js .reveal.is-visible {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* ── RESPONSIVE ─────────────────────────────── */
@media (max-width: 1024px) {
  :root {
    --container: min(1440px, calc(100% - 40px));
  }
  .templates-grid { grid-template-columns: repeat(2, 1fr); }
  .qc-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-list { grid-template-columns: 1fr; gap: var(--sp-5); }
}

@media (max-width: 768px) {
  :root {
    --container: min(100%, calc(100% - 28px));
    --container-sm: min(100%, calc(100% - 28px));
  }
  .nav-list { display: none; }
  .mobile-menu-toggle { display: grid; }
  .nav-actions .btn-primary { display: none; }
  .templates-grid { grid-template-columns: 1fr; }
  .tier-strip { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: var(--sp-8); }
  .footer-nav { grid-template-columns: repeat(2, 1fr); gap: var(--sp-6); }
  .footer-bottom { flex-direction: column; gap: var(--sp-2); }
  .hero-section { padding: var(--sp-12) 0 var(--sp-16); }
}

@media (max-width: 480px) {
  .qc-grid { grid-template-columns: 1fr; }
  .footer-nav { grid-template-columns: 1fr; }
}

@media (max-width: 320px) {
  .btn { padding: 9px 14px; font-size: 0.8125rem; }
}