/* ============================================================
   The Brew Lab — Base & shared components
   Mobile-first. Enhances up at min-width breakpoints.
   ============================================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  min-height: 100vh;
  min-height: 100dvh;
  transition: background var(--t-slow) ease, color var(--t-slow) ease;
}

/* Lenis smooth-scroll hooks (no-op until JS attaches) */
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-stopped { overflow: hidden; }

::selection { background: var(--lavender); color: var(--on-accent); }
.mono { font-family: var(--font-mono); }
img, svg { display: block; max-width: 100%; }
a { color: inherit; }

/* visually-hidden, screen-reader only */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* skip link */
.skip-link {
  position: absolute; left: 12px; top: -120px; z-index: 200;
  background: var(--lavender); color: var(--on-accent);
  padding: 10px 16px; border-radius: var(--r-md); font-weight: 600;
  font-size: 14px; text-decoration: none; transition: top var(--t-base) var(--ease);
}
.skip-link:focus { top: 12px; }

/* visible focus for keyboard users */
:focus-visible {
  outline: 2px solid var(--lavender);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- ambient glow ---------- */
.ambient {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background:
    radial-gradient(60vw 40vh at 78% 8%, var(--glow), transparent 70%),
    radial-gradient(55vw 38vh at 8% 70%, rgba(125, 211, 252, 0.10), transparent 70%);
  transition: opacity var(--t-slow) ease;
}
[data-theme="light"] .ambient {
  background:
    radial-gradient(60vw 40vh at 78% 8%, var(--glow), transparent 70%),
    radial-gradient(55vw 38vh at 8% 70%, rgba(8, 145, 178, 0.07), transparent 70%);
}

/* ---------- layout ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap-max);
  margin: 0 auto;
  padding: 0 var(--wrap-pad);
  padding-left: max(var(--wrap-pad), env(safe-area-inset-left));
  padding-right: max(var(--wrap-pad), env(safe-area-inset-right));
  position: relative;
  z-index: 1;
}

section { padding: var(--space-section) 0; position: relative; z-index: 1; }

.sec-label {
  font-family: var(--font-mono); font-size: var(--fs-eyebrow);
  color: var(--lavender); letter-spacing: 0.05em; margin-bottom: 16px;
}
h2 {
  font-size: var(--fs-h2); font-weight: 700; letter-spacing: -0.03em;
  line-height: 1.1; margin-bottom: 16px;
}
.lead { font-size: var(--fs-lead); color: var(--muted); max-width: 560px; }
.eyebrow {
  font-family: var(--font-mono); font-size: var(--fs-eyebrow); color: var(--cyan);
  letter-spacing: 0.04em; margin-bottom: 22px;
  display: inline-flex; align-items: center; gap: 9px;
}
.eyebrow .dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan); flex: none;
}
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* ---------- nav ---------- */
nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  background: var(--bg); /* fallback when color-mix() is unsupported */
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border-bottom: 1px solid var(--line);
  padding-top: env(safe-area-inset-top);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px; gap: 14px;
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 700; letter-spacing: -0.01em; font-size: 15px;
  text-decoration: none; color: var(--text); flex: none;
}
.brand .braces { font-family: var(--font-mono); color: var(--lavender); font-weight: 600; }

.nav-links { display: flex; align-items: center; gap: clamp(16px, 2.4vw, 30px); }
.nav-links a.navlink {
  color: var(--muted); text-decoration: none; font-size: 14px; font-weight: 500;
  transition: color var(--t-base) ease; position: relative; padding: 4px 0;
}
.nav-links a.navlink::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 2px; width: 0;
  background: var(--lavender); transition: width var(--t-base) var(--ease);
}
.nav-links a.navlink:hover,
.nav-links a.navlink[aria-current="page"] { color: var(--text); }
.nav-links a.navlink:hover::after,
.nav-links a.navlink[aria-current="page"]::after { width: 100%; }

.toggle {
  display: inline-flex; align-items: center; gap: 7px; cursor: pointer;
  background: var(--editor); border: 1px solid var(--line); color: var(--muted);
  padding: 9px 13px; border-radius: var(--r-pill); font-size: 12px; font-weight: 500;
  font-family: var(--font-mono); transition: all var(--t-base) ease;
  min-height: 38px;
}
.toggle:hover { color: var(--text); border-color: var(--lavender); }

/* hamburger (mobile) */
.nav-burger {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: var(--r-md);
  background: var(--editor); border: 1px solid var(--line); color: var(--text);
  cursor: pointer;
}
.nav-burger svg { width: 20px; height: 20px; }

@media (max-width: 820px) {
  /* Drop the nav's backdrop-filter on mobile: a filtered ancestor becomes the
     containing block for position:fixed children, which would otherwise trap the
     menu inside the 60px nav bar instead of letting it cover the viewport. */
  nav {
    backdrop-filter: none; -webkit-backdrop-filter: none;
    background: var(--bg);
  }
  .nav-menu {
    position: fixed;
    top: 0; right: 0; bottom: 0; left: 0;     /* explicit offsets (not inset shorthand) */
    width: 100%; height: 100%; min-height: 100dvh;
    z-index: 100;
    background: var(--bg); /* fully opaque so page content can't show through */
    display: flex; flex-direction: column; justify-content: center;
    gap: 4px; padding: 24px max(28px, env(safe-area-inset-left));
    padding-top: max(72px, env(safe-area-inset-top));
    transform: translateX(100%); transition: transform var(--t-slow) var(--ease);
    visibility: hidden;
  }
  .nav-menu.open { transform: none; visibility: visible; }
  .nav-menu a.navlink {
    font-size: 24px; font-weight: 600; color: var(--text); padding: 14px 0;
    border-bottom: 1px solid var(--line);
  }
  .nav-menu a.navlink::after { display: none; }
  .nav-menu .toggle { align-self: flex-start; margin-top: 22px; }
  .nav-menu-close {
    position: absolute; top: max(16px, env(safe-area-inset-top)); right: 20px;
    width: 44px; height: 44px; background: var(--editor); border: 1px solid var(--line);
    border-radius: var(--r-md); color: var(--text); cursor: pointer;
    display: inline-flex; align-items: center; justify-content: center;
  }
}
@media (min-width: 821px) {
  .nav-burger, .nav-menu-close { display: none; }
  .nav-inner { height: 64px; }
}

/* ---------- buttons ---------- */
.btn {
  font-family: var(--font-sans); font-size: 14.5px; font-weight: 600; cursor: pointer;
  padding: 13px 22px; border-radius: var(--r-md); border: 1px solid transparent;
  text-decoration: none; display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; min-height: 46px;
  transition: transform var(--t-fast) ease, box-shadow var(--t-base) ease, background var(--t-base) ease, border-color var(--t-base) ease, color var(--t-base) ease;
}
.btn-primary { background: var(--lavender); color: var(--on-accent); box-shadow: var(--elev-btn); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--elev-btn-hover); }
.btn-ghost { background: var(--editor); color: var(--text); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--lavender); color: var(--lavender); }
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- glass / editor window ---------- */
.editor {
  background: var(--glass); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--line); border-radius: var(--r-xl); overflow: hidden;
  box-shadow: var(--elev-card); position: relative;
}
.editor::before {
  content: ""; position: absolute; inset: -1px; border-radius: var(--r-xl);
  padding: 1px; pointer-events: none; background: var(--grad-soft);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; opacity: 0.5;
}
.ed-bar {
  display: flex; align-items: center; gap: 8px; padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--sidebar) 70%, transparent);
}
.dots { display: flex; gap: 7px; }
.dots span { width: 11px; height: 11px; border-radius: 50%; }
.dots span:nth-child(1) { background: var(--dot-red); }
.dots span:nth-child(2) { background: var(--dot-yellow); }
.dots span:nth-child(3) { background: var(--dot-green); }
.tab {
  margin-left: 12px; font-family: var(--font-mono); font-size: 12.5px; color: var(--muted);
  background: var(--editor); padding: 6px 13px; border-radius: 8px 8px 0 0;
  border: 1px solid var(--line); border-bottom: none;
}
.tab b { color: var(--champagne); font-weight: 500; }
.ed-body { display: flex; font-family: var(--font-mono); font-size: 13.5px; }
.gutter { padding: 18px 0; text-align: right; color: var(--muted); opacity: 0.5; user-select: none; min-width: 40px; }
.gutter div { padding: 0 12px; line-height: 1.85; }
.code { padding: 18px 16px 18px 4px; overflow-x: auto; flex: 1; }
.code pre { line-height: 1.85; white-space: pre; }
.kw { color: var(--lavender); } .prop { color: var(--cyan); } .str { color: var(--champagne); }
.fn { color: var(--rose); } .pun { color: var(--muted); } .num { color: var(--rose); }
.ed-foot {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 9px 14px; border-top: 1px solid var(--line);
  background: color-mix(in srgb, var(--sidebar) 70%, transparent);
  font-family: var(--font-mono); font-size: 11.5px; color: var(--muted);
}
.ed-foot .meta { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------- cards: triad ---------- */
.triad { display: grid; grid-template-columns: 1fr; gap: 16px; margin-top: 40px; }
.tcard {
  background: var(--editor); border: 1px solid var(--line); border-radius: var(--r-xl);
  padding: 26px 22px; transition: transform var(--t-base) ease, border-color var(--t-base) ease;
}
.tcard:hover { transform: translateY(-4px); border-color: var(--lavender); }
.tcard .k { font-family: var(--font-mono); font-size: 12px; color: var(--cyan); margin-bottom: 14px; }
.tcard h3 { font-size: var(--fs-h3); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 8px; }
.tcard p { color: var(--muted); font-size: 14.5px; }
@media (min-width: 720px) { .triad { grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; } }

/* ---------- tiers ---------- */
.tiers { display: flex; gap: 12px; margin-top: 40px; flex-wrap: wrap; }
.tier {
  flex: 1 1 140px; min-width: 140px; background: var(--editor); border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 22px 18px; position: relative;
  transition: all var(--t-base) ease;
}
.tier:hover { border-color: var(--rose); transform: translateY(-4px); }
.tier .lvl { font-family: var(--font-mono); font-size: 11px; color: var(--muted); margin-bottom: 10px; }
.tier .name { font-size: 19px; font-weight: 700; letter-spacing: -0.02em; }
.tier:nth-child(1) .name { color: var(--cyan); }
.tier:nth-child(2) .name { color: var(--champagne); }
.tier:nth-child(3) .name { color: var(--lavender); }
.tier:nth-child(4) .name { color: var(--rose); }
.tier:nth-child(5) .name {
  background: linear-gradient(110deg, var(--lavender), var(--rose));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

/* ---------- imagery (themed placeholders) ---------- */
.frame {
  position: relative; overflow: hidden; background: var(--editor);
  border: 1px solid var(--line); border-radius: var(--r-lg);
}
.frame img, .shot {
  display: block; width: 100%; height: 100%; object-fit: cover;
  color: transparent; /* hide alt text flash while loading */
}
.frame::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(180deg, transparent 50%, color-mix(in srgb, var(--bg) 72%, transparent));
  mix-blend-mode: multiply; opacity: 0.85;
}
[data-theme="light"] .frame::after { mix-blend-mode: normal; opacity: 0.35; }
.frame .cap {
  position: absolute; left: 12px; bottom: 11px; z-index: 1;
  font-family: var(--font-mono); font-size: 11px; color: var(--text);
  background: color-mix(in srgb, var(--bg) 55%, transparent);
  border: 1px solid var(--line); border-radius: var(--r-pill); padding: 4px 10px;
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
}
.frame:hover img { transform: scale(1.04); }
.frame img { transition: transform 0.6s var(--ease); }

/* on-brand fallback when a hotlinked photo fails to load */
.frame.img-failed {
  display: grid; place-items: center; min-height: 120px;
  background:
    radial-gradient(120% 90% at 25% 15%, color-mix(in srgb, var(--lavender) 24%, transparent), transparent 60%),
    radial-gradient(120% 90% at 85% 95%, color-mix(in srgb, var(--cyan) 18%, transparent), transparent 60%),
    var(--editor);
}
.frame.img-failed::before { content: "☕"; font-size: 34px; opacity: 0.55; }

.gallery { display: grid; grid-template-columns: 1fr; gap: 14px; margin-top: 44px; }
@media (min-width: 560px) { .gallery { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 860px) { .gallery { grid-template-columns: repeat(4, 1fr); } }

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--line); padding: 56px 0 calc(40px + env(safe-area-inset-bottom)); position: relative; z-index: 1; }
.foot-grid { display: flex; justify-content: space-between; align-items: flex-start; gap: 32px; flex-wrap: wrap; }
.foot-code {
  background: var(--editor); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 20px 22px; font-family: var(--font-mono); font-size: 13px; line-height: 1.8;
  overflow-x: auto;
}
.foot-meta { font-size: 13px; color: var(--muted); }
.foot-nav { display: flex; flex-wrap: wrap; gap: 14px 22px; margin-top: 8px; }
.foot-nav a { color: var(--muted); text-decoration: none; font-size: 13px; transition: color var(--t-base) ease; }
.foot-nav a:hover { color: var(--text); }
.foot-sig {
  margin-top: 36px; font-family: var(--font-mono); font-size: 12.5px; color: var(--muted);
  display: flex; gap: 8px; flex-wrap: wrap; align-items: center;
}
.foot-sig b { color: var(--text); font-weight: 600; }

/* ---------- reveal (JS adds .in; visible by default if JS/observer absent) ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.no-js .reveal, html:not(.js) .reveal { opacity: 1; transform: none; }

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1 !important; transform: none !important; transition: none; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}