/* ============================================================================
   SWIMSTREAM — Layout: header, nav, hero, footer, section scaffolding.
   ========================================================================== */

/* ----------------------------------------------------------------- HEADER */
.site-header {
  position: sticky; top: 0; z-index: 50;
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease),
              backdrop-filter var(--t) var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: var(--glass-2);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: var(--border);
}
.site-header__inner {
  display: flex; align-items: center; gap: 1.5rem;
  height: 68px;
}
.brand { display: inline-flex; align-items: center; gap: .6rem; }
.brand__mark { display: grid; place-content: center; transition: transform var(--t) var(--ease); }
.brand:hover .brand__mark { transform: rotate(8deg) scale(1.05); }
.brand__word { font-weight: 600; font-size: 1.12rem; letter-spacing: -.03em; color: var(--ink-strong); }
.brand__dot { color: var(--accent); }

.site-nav { display: flex; align-items: center; gap: 1.6rem; margin-inline: auto; }
.site-nav a {
  position: relative; font-size: .9rem; color: var(--muted); font-weight: 450;
  white-space: nowrap;
  transition: color var(--t) var(--ease);
}
.site-nav a::after {
  content: ""; position: absolute; left: 0; bottom: -6px; height: 1px; width: 0;
  background: linear-gradient(90deg, var(--primary-2), var(--accent));
  transition: width var(--t) var(--ease);
}
.site-nav a:hover, .site-nav a.active { color: var(--ink-strong); }
.site-nav a:hover::after, .site-nav a.active::after { width: 100%; }

.site-header__actions { display: flex; align-items: center; gap: .7rem; }

.theme-toggle {
  width: 40px; height: 40px; display: grid; place-content: center;
  border-radius: var(--r-pill); cursor: pointer;
  background: var(--wash); border: 1px solid var(--border); color: var(--ink);
  transition: all var(--t) var(--ease);
}
.theme-toggle:hover { border-color: var(--border-2); color: var(--accent); transform: translateY(-1px); }
.theme-toggle__sun { display: none; }
.theme-toggle__moon { display: block; }
[data-theme="light"] .theme-toggle__sun { display: block; }
[data-theme="light"] .theme-toggle__moon { display: none; }

.menu-toggle { display: none; width: 40px; height: 40px; border-radius: var(--r-sm);
  background: var(--wash); border: 1px solid var(--border); cursor: pointer;
  flex-direction: column; gap: 4px; align-items: center; justify-content: center; }
.menu-toggle span { width: 16px; height: 1.5px; background: var(--ink); display: block; transition: all var(--t) var(--ease); }

.mobile-menu { display: none; }

@media (max-width: 920px) {
  .site-nav { display: none; }
  .site-header__cta { display: none; }
  .menu-toggle { display: flex; }
  .mobile-menu {
    display: block; overflow: hidden; max-height: 0;
    background: var(--glass-2); backdrop-filter: blur(14px);
    border-bottom: 1px solid transparent;
    transition: max-height var(--t-slow) var(--ease), border-color var(--t) var(--ease);
  }
  .mobile-menu.open { max-height: 420px; border-bottom-color: var(--border); }
  .mobile-menu a { display: block; padding: .85rem var(--gutter); color: var(--ink); border-top: 1px solid var(--border); }
  .mobile-menu a.btn { margin: .8rem var(--gutter) 1rem; padding: .85rem; border-top: 0; }
}

/* ------------------------------------------------------------------- HERO */
.hero { position: relative; overflow: hidden; padding-block: clamp(48px, 7vw, 96px) clamp(56px, 8vw, 110px); }
.hero__grid {
  display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(28px, 4vw, 56px);
  align-items: center; position: relative; z-index: 2;
}
@media (max-width: 980px) { .hero__grid { grid-template-columns: 1fr; } }

.hero__title {
  font-size: clamp(2.4rem, 5.4vw, 4.1rem);
  letter-spacing: -.035em;
  margin-top: 1.1rem;
}
.hero__title .grad {
  background: linear-gradient(100deg, var(--primary-2), var(--accent) 60%, var(--emerald));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__lead { color: var(--muted); font-size: clamp(1rem, 1.4vw, 1.18rem); max-width: 52ch; margin-top: 1.25rem; }
.hero__ctas { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.8rem; }
.hero__hook {
  display: inline-flex; align-items: center; gap: .6em;
  font-family: 'JetBrains Mono', monospace; font-size: .82rem; color: var(--ink);
  background: var(--wash); border: 1px solid var(--border); border-radius: var(--r-pill);
  padding: .4em .5em .4em .9em;
}
.hero__hook b { color: var(--accent); font-weight: 500; }
.hero__hook .tag { background: var(--card-2); border:1px solid var(--border); border-radius: var(--r-pill); padding:.15em .6em; color: var(--muted); }

.hero__badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 2rem; }

/* Hero console card */
.console { position: relative; }
.console__head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem 1.1rem; border-bottom: 1px solid var(--border); }
.console__title { display: flex; align-items: center; gap: .6em; font-size: .82rem; color: var(--muted); font-family: 'JetBrains Mono', monospace; }
.console__body { padding: 1.1rem; }
.console__form { display: flex; gap: .6rem; align-items: flex-end; }
.console__output { margin-top: 1rem; }

/* generic two-up layout used in sections */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(20px, 3vw, 40px); align-items: start; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } }

.section-head { max-width: 720px; margin-bottom: clamp(28px, 4vw, 48px); }
.section-head--center { margin-inline: auto; text-align: center; }
.section-head--center .eyebrow::before { display: none; }

/* ----------------------------------------------------------------- FOOTER */
.site-footer { position: relative; z-index: 1; padding-block: clamp(40px, 6vw, 72px) 2.2rem; border-top: 1px solid var(--border); margin-top: clamp(40px,6vw,80px); }
.footer-cta {
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
  flex-wrap: wrap; padding: clamp(1.5rem, 3vw, 2.4rem); margin-bottom: clamp(36px, 5vw, 64px);
}
.footer-cta__title { font-size: clamp(1.5rem, 2.6vw, 2.1rem); }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 2rem; padding-bottom: 2.2rem; border-bottom: 1px solid var(--border); }
@media (max-width: 820px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 1.6rem; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-col h3 { font-size: .78rem; text-transform: uppercase; letter-spacing: .12em; color: var(--faint); margin-bottom: .9rem; font-weight: 500; }
.footer-col a { display: block; font-size: .9rem; color: var(--muted); padding: .28rem 0; transition: color var(--t) var(--ease); }
.footer-col a:hover { color: var(--accent); }
.footer-base { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding-top: 1.6rem; font-size: .8rem; }

/* eyebrow row helper */
.kicker-row { display:flex; align-items:center; justify-content:space-between; gap:1rem; flex-wrap:wrap; }