/* ============================================================
   Titan DigiStack — layout.css
   Header, footer, hero, sections, grids
   ============================================================ */

/* ---------- Top bar ---------- */
.top-bar {
  background: linear-gradient(90deg, #0a1330 0%, #0d1730 50%, #0a1330 100%);
  border-bottom: 1px solid var(--color-border);
  font-size: 0.85rem;
}
.top-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 38px;
  padding-block: 8px;
}
.top-bar__msg { color: var(--color-text-secondary); margin: 0; }
.currency-pill {
  background: rgba(0, 200, 255, 0.08);
  border: 1px solid rgba(0, 200, 255, 0.25);
  color: var(--color-accent-primary);
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

/* ---------- Sticky header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(13, 17, 23, 0.92);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: box-shadow var(--transition-speed), border-color var(--transition-speed);
}
.site-header.is-scrolled {
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
  border-bottom-color: var(--color-border);
}
.site-header__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.25rem;
  min-height: var(--header-height);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.brand__mark { width: 36px; height: 36px; flex: none; }
.brand__text { display: inline-flex; align-items: baseline; gap: 4px; font-family: var(--font-display); }
.brand__text strong { font-weight: 800; color: var(--color-text-primary); font-size: 1.15rem; }
.brand__text span { font-weight: 500; color: var(--color-accent-primary); font-size: 1.05rem; }
.brand--footer .brand__text strong { font-size: 1.05rem; }

.header-actions {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding-block: clamp(48px, 9vw, 96px);
  background:
    radial-gradient(1100px 500px at 110% -10%, rgba(0, 200, 255, 0.18), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(0, 102, 255, 0.18), transparent 60%),
    linear-gradient(180deg, #0d1117, #0b1224 100%);
  overflow: hidden;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}
.hero__copy h1 { margin-block: 0.25rem 1rem; }
.hero__lead {
  color: var(--color-text-secondary);
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  max-width: 56ch;
  margin-bottom: 1.6rem;
}
.hero__cta { display: flex; gap: 12px; flex-wrap: wrap; }
.hero__highlights {
  margin-top: 1.6rem;
  display: flex;
  flex-wrap: wrap;
  gap: 16px 24px;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

.hero__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

/* ---------- Offer banner ---------- */
.offer-banner {
  background:
    radial-gradient(700px 300px at 90% 50%, rgba(0, 200, 255, 0.15), transparent 60%),
    linear-gradient(135deg, #0e1b3a 0%, #14213d 100%);
  border-block: 1px solid var(--color-border);
}
.offer-banner__inner {
  padding-block: clamp(36px, 6vw, 64px);
  display: grid;
  gap: 2rem;
  align-items: center;
}
.offer-banner__copy h2 { margin-block: 0.25rem 0.6rem; }
.offer-banner__copy p { margin-bottom: 1.2rem; max-width: 50ch; }

.countdown {
  display: grid;
  grid-template-columns: repeat(4, minmax(64px, 1fr));
  gap: 10px;
  max-width: 480px;
  width: 100%;
}
.countdown__cell {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  text-align: center;
  padding: 14px 8px;
  box-shadow: var(--shadow-card);
}
.countdown__cell span {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  color: var(--color-accent-primary);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.countdown__cell small {
  display: block;
  margin-top: 6px;
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.12em;
  font-size: 0.7rem;
  color: var(--color-text-muted);
}

/* ---------- Why us ---------- */
.why { padding-block: clamp(56px, 8vw, 96px); }
.why__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.why__item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: 24px;
  transition: transform var(--transition-speed), border-color var(--transition-speed), box-shadow var(--transition-speed);
}
.why__item:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 200, 255, 0.4);
  box-shadow: var(--shadow-card);
}
.why__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border-radius: 12px;
  background: rgba(0, 200, 255, 0.12);
  color: var(--color-accent-primary);
  margin-bottom: 14px;
}
.why__icon svg { width: 24px; height: 24px; }
.why__item h3 { margin-bottom: 4px; }

/* ---------- Category tabs ---------- */
.cat-tabs {
  position: sticky;
  top: var(--header-height);
  z-index: 40;
  background: var(--color-bg-secondary);
  border-block: 1px solid var(--color-border);
}
.cat-tabs__scroll {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-block: 12px;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}
.cat-tabs__scroll::-webkit-scrollbar { height: 6px; }
.cat-tabs__scroll::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 3px; }

/* ---------- Category sections ---------- */
.cat-section { padding-block: clamp(56px, 8vw, 96px); }
.cat-section + .cat-section { padding-top: 0; }
.cat-section--placeholder {
  background:
    repeating-linear-gradient(135deg, rgba(0, 200, 255, 0.04) 0 12px, transparent 12px 24px),
    var(--color-bg-secondary);
  border-block: 1px solid var(--color-border);
}

.product-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

/* ---------- Newsletter ---------- */
.newsletter {
  padding-block: clamp(56px, 8vw, 96px);
  background:
    radial-gradient(800px 280px at 50% 0%, rgba(0, 200, 255, 0.18), transparent 60%),
    var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
}
.newsletter__inner {
  display: grid;
  gap: 1.5rem;
  align-items: center;
}
.newsletter h2 { margin-bottom: 0.4rem; }
.newsletter__form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 8px;
  border-radius: var(--border-radius-md);
}
.newsletter__form input {
  flex: 1 1 220px;
  background: transparent;
  border: 0;
  padding: 12px 14px;
  color: var(--color-text-primary);
  min-width: 0;
}
.newsletter__form input::placeholder { color: var(--color-text-muted); }

/* ---------- Footer ---------- */
.site-footer {
  background: linear-gradient(180deg, #0a0f1a 0%, #070b14 100%);
  border-top: 1px solid var(--color-border);
  padding-top: clamp(48px, 7vw, 80px);
}
.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding-bottom: 2rem;
}
.site-footer h4 {
  margin-bottom: 14px;
  color: var(--color-text-primary);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.site-footer ul li { margin-bottom: 8px; }
.site-footer ul a { color: var(--color-text-secondary); transition: color var(--transition-speed); }
.site-footer ul a:hover { color: var(--color-accent-primary); }
.site-footer__about { color: var(--color-text-secondary); margin-top: 12px; max-width: 38ch; }
.site-footer__contact a { color: var(--color-text-secondary); }
.site-footer__contact a:hover { color: var(--color-accent-primary); }

.socials { display: inline-flex; gap: 8px; margin-top: 14px; }
.socials a {
  width: 38px; height: 38px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: color var(--transition-speed), border-color var(--transition-speed), transform var(--transition-speed);
}
.socials a:hover {
  color: var(--color-accent-primary);
  border-color: rgba(0, 200, 255, 0.5);
  transform: translateY(-2px);
}
.socials svg { width: 18px; height: 18px; }

.site-footer__bottom {
  border-top: 1px solid var(--color-border);
  padding-block: 18px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}
.site-footer__bottom .container {
  display: flex; gap: 1rem; flex-wrap: wrap; justify-content: space-between;
}
.site-footer__bottom p { color: inherit; margin: 0; }

/* ---------- Mobile Nav ---------- */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(7, 11, 20, 0.96);
  backdrop-filter: blur(8px);
  transform: translateX(100%);
  transition: transform 0.35s ease;
  visibility: hidden;
}
.mobile-nav.is-open { transform: translateX(0); visibility: visible; }
.mobile-nav__inner {
  height: 100%;
  padding: 24px;
  display: flex;
  flex-direction: column;
}
.mobile-nav__close {
  margin-left: auto;
  margin-bottom: 16px;
}
.mobile-nav nav { display: grid; gap: 4px; }
.mobile-nav nav a {
  padding: 14px 16px;
  border-radius: var(--border-radius-md);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--color-text-primary);
  border: 1px solid transparent;
  transition: background var(--transition-speed), border-color var(--transition-speed);
}
.mobile-nav nav a:hover,
.mobile-nav nav a:focus-visible {
  background: var(--color-bg-card);
  border-color: var(--color-border);
}