/* SPDX-License-Identifier: MIT
   Copyright (c) 2026 Yann Ramin

   Calcumaker 16 — marketing site.
   Palette lifted from the device itself: dark anodised case, gold `f` shift,
   blue `g` shift, red LED segments. */

:root {
  --bg: #0c0d10;
  --bg-alt: #101216;
  --case: #23262b;
  --case-edge: #14161a;
  --line: #262a31;
  --ink: #e7e9ee;
  --ink-dim: #9aa1ad;
  --ink-faint: #767d89;
  --gold: #f0c25a;
  --blue: #6ea8ff;
  --led: #ff3b30;
  --radius: 14px;
  --wrap: 1120px;

  color-scheme: dark;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--blue); }

.wrap { width: min(var(--wrap), 100% - 2.5rem); margin-inline: auto; }
.wrap.narrow { max-width: 760px; }

.skip {
  position: absolute; left: -9999px;
  background: var(--gold); color: #201a08; padding: .6rem 1rem; border-radius: 8px;
}
.skip:focus { left: 1rem; top: 1rem; z-index: 20; }

:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; border-radius: 4px; }

/* ---- nav ---------------------------------------------------------------- */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: rgb(12 13 16 / 82%);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
/* Wrap rather than overflow: the brand + GitHub button don't fit a 320px phone,
   and font metrics differ between platforms — this overflowed only on CI's
   Chromium. Wrapping is metric-agnostic; min-width:0 lets children shrink. */
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: .5rem 1rem; padding: .85rem 0; min-width: 0;
}

.brand { display: flex; align-items: center; gap: .55rem; text-decoration: none; color: var(--ink); min-width: 0; }
.brand-mark { width: 30px; height: 30px; flex: none; }
.brand b { letter-spacing: .16em; font-size: .95rem; }

.nav nav { display: flex; align-items: center; gap: 1.25rem; }
.nav nav a { color: var(--ink-dim); text-decoration: none; font-size: .92rem; }
.nav nav a:hover { color: var(--ink); }
.nav nav a.ghost {
  border: 1px solid var(--line); padding: .35rem .8rem; border-radius: 8px; color: var(--ink);
}
.nav nav a.ghost:hover { border-color: var(--gold); color: var(--gold); }

/* ---- hero --------------------------------------------------------------- */
.hero {
  padding: clamp(3rem, 9vw, 6.5rem) 0 clamp(2.5rem, 6vw, 4.5rem);
  background:
    radial-gradient(80% 120% at 50% -10%, #23262b 0%, transparent 60%),
    linear-gradient(180deg, #101216, var(--bg));
  border-bottom: 1px solid var(--line);
  text-align: center;
}
/* The mark, not a lockup: `calcumaker-logo.svg` bakes in "16", which names the
   device — this site is for the Calcumaker line. See BRAND.md. */
.hero-mark {
  width: clamp(72px, 9vw, 104px); height: auto;
  margin: 0 auto clamp(1.1rem, 3vw, 1.6rem);
}

.tagline {
  margin: 0 0 1.1rem;
  font-family: ui-monospace, Menlo, monospace;
  font-size: clamp(.8rem, 1.4vw, .95rem);
  letter-spacing: .22em; text-transform: uppercase;
  color: var(--gold);
}

.eyebrow {
  margin: 0 0 1rem; font-size: .78rem; letter-spacing: .18em; text-transform: uppercase;
  color: var(--ink-faint);
}
h1 {
  margin: 0 0 1.1rem;
  font-size: clamp(2rem, 5.4vw, 3.6rem);
  line-height: 1.1; letter-spacing: -.02em; font-weight: 800;
}
h1 em { font-style: normal; color: var(--gold); }

.lede {
  margin: 0 auto; max-width: 62ch; color: var(--ink-dim);
  font-size: clamp(1rem, 1.6vw, 1.15rem);
}

/* the 7-seg strip */
.seg-strip {
  margin: clamp(2rem, 5vw, 3.2rem) auto clamp(1.8rem, 4vw, 2.6rem);
  max-width: 900px;
  background: #1a0605;
  border: 1px solid #000;
  border-radius: var(--radius);
  padding: clamp(.8rem, 2.5vw, 1.5rem);
  box-shadow: inset 0 3px 24px rgb(0 0 0 / 70%);
}
#segdisplay { width: 100%; height: auto; display: block; }
.seg { fill: rgb(255 59 48 / 7%); }
.seg.on { fill: var(--led); filter: drop-shadow(0 0 6px var(--led)); }

.cta { display: flex; flex-wrap: wrap; gap: .75rem; justify-content: center; }
.btn {
  display: inline-block; text-decoration: none;
  border: 1px solid var(--line); border-radius: 10px;
  padding: .7rem 1.3rem; font-weight: 600; font-size: .95rem;
  color: var(--ink); background: #1b1e23;
  transition: transform .06s ease, border-color .12s ease;
}
.btn:hover { border-color: #3a404a; transform: translateY(-1px); }
.btn.primary { background: var(--gold); color: #201a08; border-color: var(--gold); }
.btn.primary:hover { background: #ffd170; }

.status {
  margin: clamp(2rem, 5vw, 3rem) auto 0; max-width: 60ch;
  font-size: .88rem; color: var(--ink-faint);
  border: 1px dashed var(--line); border-radius: 10px; padding: .8rem 1rem;
}
.status strong { color: var(--ink-dim); }

/* ---- sections ----------------------------------------------------------- */
.section { padding: clamp(3rem, 8vw, 5.5rem) 0; }
.section.alt { background: var(--bg-alt); border-block: 1px solid var(--line); }

h2 {
  margin: 0 0 1rem; font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  letter-spacing: -.01em; font-weight: 750;
}
.section-lede { margin: 0 0 2.2rem; color: var(--ink-dim); max-width: 68ch; }

.grid {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
  margin-top: 2rem;
}
.card {
  background: linear-gradient(180deg, #1a1d22, #15171b);
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.4rem 1.4rem 1.5rem;
}
.card h3 { margin: 0 0 .5rem; font-size: 1.05rem; color: var(--gold); }
.card p { margin: 0; color: var(--ink-dim); font-size: .94rem; }
.card b { color: var(--ink); font-weight: 650; }

/* ---- displays ----------------------------------------------------------- */
.shots { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr)); }
.shots figure { margin: 0; }
.shots img {
  border-radius: var(--radius); border: 1px solid #000;
  box-shadow: 0 18px 44px rgb(0 0 0 / 55%);
}
.shots figcaption { margin-top: .85rem; font-size: .9rem; color: var(--ink-faint); }
.shots figcaption b { color: var(--ink); }

/* ---- specs -------------------------------------------------------------- */
.specs { margin: 2rem 0 0; display: grid; gap: 0; }
.specs > div {
  display: grid; grid-template-columns: 200px 1fr; gap: 1.5rem;
  padding: .95rem 0; border-top: 1px solid var(--line);
}
.specs > div:last-child { border-bottom: 1px solid var(--line); }
.specs dt { color: var(--ink-faint); font-size: .85rem; letter-spacing: .06em; text-transform: uppercase; }
.specs dd { margin: 0; color: var(--ink-dim); }
.specs code {
  font-family: ui-monospace, Menlo, monospace; font-size: .88em;
  background: rgb(0 0 0 / 35%); padding: .1em .4em; border-radius: 4px; color: var(--gold);
}

/* ---- repos -------------------------------------------------------------- */
.repos { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr)); margin-top: 2rem; }
.repo {
  display: flex; flex-direction: column; gap: .25rem; text-decoration: none;
  border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem 1.2rem;
  background: #15171b; color: var(--ink);
}
.repo:hover { border-color: var(--gold); }
.repo b { font-family: ui-monospace, Menlo, monospace; color: var(--gold); font-weight: 600; }
.repo span { color: var(--ink-faint); font-size: .88rem; }

/* ---- footer ------------------------------------------------------------- */
.foot { border-top: 1px solid var(--line); padding: 2rem 0; background: var(--case-edge); }
.foot-inner {
  display: flex; flex-wrap: wrap; gap: .6rem 1.4rem;
  align-items: center; justify-content: space-between;
  font-size: .86rem; color: var(--ink-faint);
}
.foot nav { display: flex; flex-wrap: wrap; gap: .6rem 1.2rem; }
.foot a { color: var(--ink-dim); text-decoration: none; }
.foot a:hover { color: var(--gold); text-decoration: underline; }

/* ---- responsive --------------------------------------------------------- */
@media (max-width: 720px) {
  .nav nav { gap: .85rem; }
  .nav nav a:not(.ghost) { display: none; }   /* keep the bar clean on phones */
  .specs > div { grid-template-columns: 1fr; gap: .2rem; }
  .foot-inner { flex-direction: column; align-items: flex-start; }
}

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