/* Mireo brand tokens: see DESIGN.md. Dark-first per the brand system. */
:root {
  --bg: #14161A;
  --surface: #1E2127;
  --border: #2C313A;
  --ink: #F2F0EA;
  --muted: #B0B4BA;
  --blue: #2E90FA;       /* fills and accents only */
  --blue-text: #7DB4FB;  /* text-safe on dark */
  --blue-dim: rgba(46, 144, 250, 0.12);
  --green: #5CC06B;      /* fills and accents only */
  --green-text: #84D293; /* text-safe on dark */
  --green-dim: rgba(92, 192, 107, 0.12);
  --font-display: "Bricolage Grotesque", "Noto Sans", sans-serif;
  --font-body: "Instrument Sans", "Noto Sans", -apple-system, sans-serif;
  --font-mono: "Spline Sans Mono", ui-monospace, monospace;
}

@font-face {
  font-family: "Bricolage Grotesque";
  src: url("/fonts/bricolage-grotesque-var.woff2") format("woff2");
  font-weight: 200 800;
  font-display: swap;
}
@font-face {
  font-family: "Instrument Sans";
  src: url("/fonts/instrument-sans-var.woff2") format("woff2");
  font-weight: 400 700;
  font-display: swap;
}
@font-face {
  font-family: "Instrument Sans";
  src: url("/fonts/instrument-sans-var-italic.woff2") format("woff2");
  font-weight: 400 700;
  font-style: italic;
  font-display: swap;
}
@font-face {
  font-family: "Spline Sans Mono";
  src: url("/fonts/spline-sans-mono-var.woff2") format("woff2");
  font-weight: 400 700;
  font-display: swap;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  overflow-x: clip; /* the hero glow bleeds past the viewport on purpose */
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue-text); text-decoration-color: rgba(125, 180, 251, 0.4); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--blue-text); }

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

main, .site-header, .site-footer {
  max-width: 66rem;
  margin: 0 auto;
  padding-left: clamp(1.25rem, 5vw, 3rem);
  padding-right: clamp(1.25rem, 5vw, 3rem);
}

/* header */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.5rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}
.wordmark {
  font-family: var(--font-display);
  font-weight: 650;
  font-size: 1.6rem;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.soon-chip {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.4rem 0.85rem;
}

/* hero */
.hero {
  padding: clamp(4.5rem, 12vh, 8rem) 0 clamp(4rem, 10vh, 6.5rem);
  position: relative;
}
.hero::before {
  /* the logo is a glow mark; a faint bilingual glow sits behind the headline */
  content: "";
  position: absolute;
  inset: -6rem -20% auto;
  height: 30rem;
  background:
    radial-gradient(38rem 22rem at 18% 22%, rgba(46, 144, 250, 0.09), transparent 65%),
    radial-gradient(38rem 22rem at 78% 12%, rgba(92, 192, 107, 0.08), transparent 65%);
  pointer-events: none;
  z-index: -1;
}
.hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.7rem, 8vw, 5rem);
  line-height: 1.04;
  letter-spacing: -0.025em;
  max-width: 18ch;
}
.hero-title .en {
  font-style: normal;
  color: var(--green-text);
}
.l1-cycler {
  color: var(--blue-text);
}
.l1-word {
  /* inline (not inline-block) so long names can wrap and keep an underline per line */
  text-decoration: underline;
  text-decoration-color: rgba(46, 144, 250, 0.35);
  text-decoration-thickness: 4px;
  text-underline-offset: 0.14em;
  transition: opacity 0.35s ease;
}
.l1-word.swap {
  opacity: 0;
}
.hero-sub {
  margin-top: 1.75rem;
  max-width: 34rem;
  color: var(--muted);
  font-size: 1.15rem;
}
.hero-cta {
  margin-top: 2.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}
.store-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 0.7rem 1.3rem 0.7rem 1.05rem;
  cursor: default;
}
.badge-text { display: flex; flex-direction: column; line-height: 1.25; }
.badge-text small {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.badge-text strong {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
}
.cta-note {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
}

/* sections */
section { padding: clamp(2.5rem, 7vh, 4.5rem) 0; }
h2 {
  font-family: var(--font-display);
  font-weight: 650;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 1rem;
}

/* morpheme demo */
.demo {
  display: grid;
  grid-template-columns: minmax(16rem, 1fr) minmax(20rem, 1.1fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.demo-copy p { color: var(--muted); max-width: 32rem; }
.demo-copy p + p { margin-top: 0.85rem; }
.root-inline, .prefix-inline {
  font-family: var(--font-mono);
  font-size: 0.92em;
  padding: 0.05em 0.35em;
  border-radius: 6px;
}
.root-inline { color: var(--green-text); background: var(--green-dim); }
.prefix-inline { color: var(--blue-text); background: var(--blue-dim); }

.word-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: clamp(1.5rem, 3.5vw, 2.25rem);
}
.card-headword {
  font-family: var(--font-display);
  font-weight: 650;
  font-size: clamp(1.9rem, 4.5vw, 2.6rem);
  letter-spacing: -0.02em;
}
.chip-row {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-top: 1.1rem;
  flex-wrap: wrap;
}
.morpheme-chip {
  font-family: var(--font-mono);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.15rem;
  background: none;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.6rem 0.95rem;
  cursor: pointer;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}
.chip-text { font-size: 1.15rem; font-weight: 550; }
.chip-role { font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.chip-prefix .chip-text { color: var(--blue-text); }
.chip-root .chip-text { color: var(--green-text); }
.chip-prefix:hover, .chip-prefix.active { border-color: var(--blue); background: var(--blue-dim); }
.chip-root:hover, .chip-root.active { border-color: var(--green); background: var(--green-dim); }
.chip-plus { color: var(--muted); font-size: 1.3rem; }
.card-gloss {
  margin-top: 0.9rem;
  color: var(--muted);
  font-style: italic;
}
.unlock { margin-top: 1.4rem; }
.unlock-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.unlock-words {
  margin-top: 0.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  font-size: 1.05rem;
  color: var(--muted);
  transition: color 0.25s ease;
}
.unlock-words b { font-weight: 500; transition: color 0.25s ease; }
.hl-root { color: rgba(132, 210, 147, 0.55); }
.hl-prefix { color: rgba(125, 180, 251, 0.55); }
.unlock.lit .unlock-words { color: var(--ink); }
.unlock.lit .hl-root { color: var(--green-text); }
.unlock.lit .hl-prefix { color: var(--blue-text); }

/* how it works */
.how-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}
@media (max-width: 46rem) {
  .how-grid { grid-template-columns: 1fr; }
}
.how-tile {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
}
.how-tile h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.tile-accent {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 3px;
  flex-shrink: 0;
}
.accent-blue { background: var(--blue); }
.accent-green { background: var(--green); }
.how-tile p { margin-top: 0.6rem; color: var(--muted); font-size: 0.98rem; }

/* languages */
.langs p { color: var(--muted); max-width: 34rem; }
.lang-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.4rem;
}
.lang-list li {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.5rem 1.1rem;
  color: var(--muted);
  font-size: 0.95rem;
}
.lang-native {
  color: var(--blue-text);
  margin-right: 0.45rem;
}

/* footer */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: clamp(2rem, 6vh, 4rem);
  padding-top: 2.25rem;
  padding-bottom: 3rem;
  color: var(--muted);
  font-size: 0.95rem;
}
.site-footer p { max-width: 38rem; }
.footer-meta { margin-top: 1rem; font-size: 0.85rem; }

/* small screens */
@media (max-width: 46rem) {
  .demo { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .l1-word, .unlock-words, .unlock-words b, .morpheme-chip { transition: none; }
}