/* ============================================================
   TaberNaCl Media — salt-crystal identity
   Na (sodium) + Cl (chloride) = halite. Mineral night palette,
   crystalline lattice motif, periodic-tile signature.
   ============================================================ */

:root {
  --bg:        #0A0D14;
  --bg-2:      #0D111B;
  --surface:   #131826;
  --surface-2: #1A2132;
  --line:      rgba(139, 127, 245, 0.14);
  --line-soft: rgba(255, 255, 255, 0.06);

  --text:      #EAECF4;
  --muted:     #98A1BC;
  --faint:     #5C6580;

  --violet:    #8B7FF5;  /* halite glow / primary */
  --violet-hi: #A99BFF;
  --cyan:      #6FE0EF;  /* salt refraction / secondary */
  --amber:     #F2C879;  /* sodium flame accent, used sparingly */

  --radius: 14px;
  --radius-sm: 10px;
  --maxw: 1080px;

  --ff-display: "Space Grotesk", system-ui, sans-serif;
  --ff-body: "IBM Plex Sans", system-ui, sans-serif;
  --ff-mono: "IBM Plex Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  font-family: var(--ff-body);
  color: var(--text);
  background:
    radial-gradient(900px 500px at 78% -8%, rgba(139,127,245,0.16), transparent 60%),
    radial-gradient(700px 460px at 6% 8%, rgba(111,224,239,0.08), transparent 55%),
    var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* Faint cubic salt lattice over the whole page */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(139,127,245,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139,127,245,0.05) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
}

a { color: var(--violet-hi); text-decoration: none; }
a:hover { color: var(--cyan); }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }

/* ---------- Periodic element tile (the signature) ---------- */
.tile {
  display: inline-grid;
  grid-template-rows: auto 1fr auto;
  width: 46px; height: 46px;
  padding: 5px 7px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: linear-gradient(150deg, var(--surface-2), var(--surface));
  font-family: var(--ff-mono);
  line-height: 1;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.05), 0 6px 20px rgba(0,0,0,0.4);
}
.tile .num { font-size: 9px; color: var(--muted); }
.tile .sym { font-size: 19px; font-weight: 600; align-self: center; letter-spacing: 0.5px; }
.tile .mass { font-size: 8px; color: var(--faint); text-align: right; }
.tile.na .sym { color: var(--amber); }
.tile.cl .sym { color: var(--cyan); }

/* ---------- Top navigation ---------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(10,13,20,0.72);
  border-bottom: 1px solid var(--line-soft);
}
.nav .wrap { display: flex; align-items: center; gap: 18px; height: 68px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand .logo {
  display: flex; gap: 4px;
}
.brand .logo .tile { width: 34px; height: 34px; padding: 3px 5px; border-radius: 7px; }
.brand .logo .tile .sym { font-size: 14px; }
.brand .logo .tile .num { font-size: 7px; }
.brand .logo .tile .mass { display: none; }
.brand .name { font-family: var(--ff-display); font-weight: 600; font-size: 1.12rem; letter-spacing: -0.01em; }
.brand .name b { color: var(--violet-hi); font-weight: 600; }
.nav .links { margin-left: auto; display: flex; gap: 6px; align-items: center; }
.nav .links a {
  color: var(--muted); font-size: 0.94rem; padding: 8px 14px; border-radius: 9px;
  transition: color .15s, background .15s;
}
.nav .links a:hover, .nav .links a[aria-current="page"] { color: var(--text); background: rgba(139,127,245,0.10); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--ff-body); font-weight: 500; font-size: 0.96rem;
  padding: 11px 20px; border-radius: 11px; cursor: pointer;
  border: 1px solid transparent; transition: transform .12s, box-shadow .2s, background .2s;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--violet), #6F62E0);
  color: #fff; box-shadow: 0 8px 26px rgba(139,127,245,0.32);
}
.btn-primary:hover { color: #fff; box-shadow: 0 10px 32px rgba(139,127,245,0.46); }
.btn-ghost { background: var(--surface); border-color: var(--line); color: var(--text); }
.btn-ghost:hover { color: var(--text); border-color: var(--violet); background: var(--surface-2); }

/* ---------- Hero ---------- */
.hero { padding: 92px 0 64px; }
.eyebrow {
  font-family: var(--ff-mono); font-size: 0.78rem; letter-spacing: 0.32em; text-transform: uppercase;
  color: var(--cyan); margin: 0 0 22px;
}
.hero h1 {
  font-family: var(--ff-display); font-weight: 600; letter-spacing: -0.03em;
  font-size: clamp(2.6rem, 7vw, 4.6rem); line-height: 1.02; margin: 0 0 18px;
}
.hero h1 .salt { color: var(--violet-hi); }
.hero p.lede { font-size: 1.18rem; color: var(--muted); max-width: 56ch; margin: 0 0 34px; }
.hero .cta-row { display: flex; gap: 12px; flex-wrap: wrap; }

/* lattice chip strip under hero */
.formula {
  margin-top: 46px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  font-family: var(--ff-mono); color: var(--muted); font-size: 0.92rem;
}
.formula .op { color: var(--faint); font-size: 1.3rem; }

/* ---------- Action grid (landing) ---------- */
.section-head { margin: 70px 0 26px; }
.section-head h2 {
  font-family: var(--ff-display); font-weight: 600; font-size: 1.7rem; letter-spacing: -0.02em; margin: 0 0 8px;
}
.section-head p { color: var(--muted); margin: 0; }

.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.card {
  position: relative; display: block; padding: 26px;
  background: linear-gradient(160deg, var(--surface-2), var(--surface));
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  transition: transform .18s, border-color .18s, box-shadow .25s;
}
.card::after { /* faceted corner gleam */
  content: ""; position: absolute; top: -40%; right: -30%; width: 220px; height: 220px;
  background: radial-gradient(circle, rgba(139,127,245,0.20), transparent 65%);
  opacity: 0; transition: opacity .25s;
}
.card:hover { transform: translateY(-4px); border-color: var(--violet); box-shadow: 0 18px 44px rgba(0,0,0,0.45); }
.card:hover::after { opacity: 1; }
.card .ico {
  width: 44px; height: 44px; border-radius: 11px; display: grid; place-items: center;
  background: rgba(139,127,245,0.12); border: 1px solid var(--line); margin-bottom: 16px;
}
.card .ico svg { width: 22px; height: 22px; stroke: var(--violet-hi); }
.card h3 { font-family: var(--ff-display); font-weight: 600; font-size: 1.22rem; margin: 0 0 6px; color: var(--text); }
.card p { color: var(--muted); margin: 0 0 14px; font-size: 0.96rem; }
.card .go { font-family: var(--ff-mono); font-size: 0.82rem; color: var(--cyan); letter-spacing: 0.04em; }
.card .go::after { content: " →"; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--line-soft); margin-top: 90px; padding: 34px 0; }
.footer .wrap { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between; }
.footer .small { color: var(--faint); font-size: 0.86rem; font-family: var(--ff-mono); }
.footer .flinks { display: flex; gap: 18px; }
.footer .flinks a { color: var(--muted); font-size: 0.9rem; }
.footer .flinks a:hover { color: var(--cyan); }

/* ============================================================
   DOCS
   ============================================================ */
.docs-layout { display: grid; grid-template-columns: 240px 1fr; gap: 48px; padding: 48px 0 40px; align-items: start; }
.toc { position: sticky; top: 88px; }
.toc .toc-title { font-family: var(--ff-mono); font-size: 0.72rem; letter-spacing: 0.24em; text-transform: uppercase; color: var(--faint); margin: 0 0 14px; }
.toc a { display: block; color: var(--muted); padding: 6px 12px; border-left: 2px solid var(--line-soft); font-size: 0.92rem; transition: color .15s, border-color .15s; }
.toc a:hover { color: var(--text); border-left-color: var(--violet); }

.doc h1 { font-family: var(--ff-display); font-weight: 600; font-size: clamp(2rem, 5vw, 2.8rem); letter-spacing: -0.02em; margin: 0 0 10px; }
.doc > p.intro { color: var(--muted); font-size: 1.08rem; max-width: 64ch; margin: 0 0 12px; }

.doc section { scroll-margin-top: 88px; padding: 34px 0; border-top: 1px solid var(--line-soft); }
.doc section:first-of-type { border-top: none; }
.doc h2 {
  font-family: var(--ff-display); font-weight: 600; font-size: 1.6rem; letter-spacing: -0.01em; margin: 0 0 14px;
  display: flex; align-items: baseline; gap: 12px;
}
.doc h2 .step { font-family: var(--ff-mono); font-size: 0.85rem; color: var(--cyan); }
.doc h3 { font-family: var(--ff-display); font-weight: 600; font-size: 1.12rem; margin: 24px 0 8px; color: var(--text); }
.doc p { color: #C4CADC; margin: 0 0 12px; }
.doc ul, .doc ol { color: #C4CADC; margin: 0 0 14px; padding-left: 22px; }
.doc li { margin: 6px 0; }
.doc strong { color: var(--text); }
.doc code {
  font-family: var(--ff-mono); font-size: 0.86em; background: var(--surface-2);
  border: 1px solid var(--line-soft); padding: 1px 6px; border-radius: 6px; color: var(--cyan);
}

.callout {
  display: flex; gap: 14px; padding: 16px 18px; border-radius: var(--radius-sm);
  background: rgba(111,224,239,0.06); border: 1px solid rgba(111,224,239,0.18); margin: 18px 0;
}
.callout .dot { flex: none; width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); margin-top: 9px; box-shadow: 0 0 12px var(--cyan); }
.callout p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.callout.warn { background: rgba(242,200,121,0.06); border-color: rgba(242,200,121,0.2); }
.callout.warn .dot { background: var(--amber); box-shadow: 0 0 12px var(--amber); }

/* client / platform cards */
.platforms { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 18px 0 6px; }
.pf {
  display: flex; gap: 14px; padding: 16px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: var(--surface); align-items: flex-start;
}
.pf .pf-ico { flex: none; width: 38px; height: 38px; border-radius: 9px; display: grid; place-items: center; background: rgba(139,127,245,0.12); border: 1px solid var(--line); }
.pf .pf-ico svg { width: 20px; height: 20px; stroke: var(--violet-hi); }
.pf h4 { font-family: var(--ff-display); font-weight: 600; margin: 0 0 4px; font-size: 1rem; color: var(--text); }
.pf p { margin: 0; font-size: 0.88rem; color: var(--muted); }
.pf a { font-size: 0.88rem; }

/* numbered flow for the stack explainer */
.flow { display: grid; gap: 0; margin: 18px 0; }
.flow .step-row { display: grid; grid-template-columns: 40px 1fr; gap: 16px; padding: 14px 0; border-bottom: 1px dashed var(--line-soft); }
.flow .step-row:last-child { border-bottom: none; }
.flow .n { font-family: var(--ff-mono); color: var(--violet-hi); font-size: 1.1rem; font-weight: 600; }
.flow .step-row h4 { margin: 0 0 4px; font-family: var(--ff-display); font-weight: 600; font-size: 1.02rem; color: var(--text); }
.flow .step-row p { margin: 0; font-size: 0.92rem; }

/* ============================================================
   CONTACT
   ============================================================ */
.contact-layout { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 56px; padding: 64px 0; align-items: start; }
.contact-intro h1 { font-family: var(--ff-display); font-weight: 600; font-size: clamp(2.1rem, 5vw, 3rem); letter-spacing: -0.02em; margin: 0 0 14px; }
.contact-intro p { color: var(--muted); font-size: 1.06rem; max-width: 42ch; }
.contact-intro .direct { margin-top: 26px; font-family: var(--ff-mono); font-size: 0.92rem; color: var(--muted); }
.contact-intro .direct a { color: var(--cyan); }

.form { background: linear-gradient(160deg, var(--surface-2), var(--surface)); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 0.86rem; color: var(--muted); margin-bottom: 7px; font-family: var(--ff-mono); letter-spacing: 0.02em; }
.field input, .field textarea, .field select {
  width: 100%; padding: 12px 14px; border-radius: var(--radius-sm);
  background: var(--bg-2); border: 1px solid var(--line); color: var(--text);
  font-family: var(--ff-body); font-size: 0.98rem; transition: border-color .15s, box-shadow .15s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--violet); box-shadow: 0 0 0 3px rgba(139,127,245,0.18);
}
.field textarea { resize: vertical; min-height: 130px; }

.segmented { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.segmented label {
  display: flex; align-items: center; justify-content: center; gap: 8px; cursor: pointer; margin: 0;
  padding: 12px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--bg-2);
  font-family: var(--ff-body); color: var(--muted); transition: all .15s; letter-spacing: 0;
}
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented label:has(input:checked) { border-color: var(--violet); background: rgba(139,127,245,0.12); color: var(--text); }
.segmented label:has(input:focus-visible) { box-shadow: 0 0 0 3px rgba(139,127,245,0.18); }

.hp { position: absolute; left: -9999px; opacity: 0; height: 0; }

.form-status { margin-top: 14px; font-size: 0.92rem; min-height: 1.2em; }
.form-status.ok { color: var(--cyan); }
.form-status.err { color: var(--amber); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .grid { grid-template-columns: 1fr; }
  .platforms { grid-template-columns: 1fr; }
  .docs-layout { grid-template-columns: 1fr; gap: 8px; }
  .toc { position: static; display: none; }
  .contact-layout { grid-template-columns: 1fr; gap: 28px; padding: 40px 0; }
  .nav .links a { padding: 8px 10px; }
  .hero { padding: 64px 0 44px; }
}

:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; border-radius: 4px; }