/* Ear Trainer: Tank Blueprint look (olive drab, khaki lines, signal yellow).
   System fonts for now; no outside font services, to keep kids' visits private. */

:root {
  --olive: #4B5320;
  --olive-dark: #3E4519;
  --olive-deep: #2A2E12;
  --khaki: #E8E2C8;
  --khaki-dim: #C9C6A8;
  --khaki-faint: #B8B699;
  --signal: #F2C14E;
  --grid: rgba(232, 226, 200, 0.09);
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --head: "Arial Black", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body { margin: 0; }

body {
  min-height: 100vh;
  background-color: var(--olive);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--khaki);
  font-family: var(--mono);
  font-size: 17px;
  line-height: 1.45;
}

.staging-banner {
  background: var(--signal);
  color: var(--olive-deep);
  text-align: center;
  font-weight: 700;
  padding: 6px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 13px;
}

.wrap { max-width: 860px; margin: 0 auto; padding: 32px 20px 48px; }

.head { margin-bottom: 24px; }
.eyebrow { margin: 0; color: var(--signal); letter-spacing: 0.2em; text-transform: uppercase; font-size: 13px; }
h1 { margin: 4px 0 8px; font-family: var(--head); font-size: clamp(32px, 6vw, 48px); letter-spacing: 0.02em; text-transform: uppercase; line-height: 1; }
.lede { margin: 0; color: var(--khaki-dim); max-width: 60ch; }

.panel {
  border: 2px solid var(--khaki);
  background: var(--olive-dark);
  padding: 20px;
  margin-bottom: 20px;
}
.panel__title { margin: 18px 0 10px; font-family: var(--head); font-size: 16px; letter-spacing: 0.08em; text-transform: uppercase; }
.panel__title:first-child { margin-top: 0; }

.grid { display: grid; gap: 8px; }
.grid--intervals { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.chip, .btn, .select {
  font: inherit;
  color: var(--khaki);
  background: transparent;
  border: 2px solid var(--khaki);
  min-height: 48px;
  cursor: pointer;
}
.chip { padding: 8px 10px; text-align: left; display: flex; flex-direction: column; gap: 2px; }
.chip__name { font-weight: 700; }
.chip__sub { font-size: 13px; color: var(--khaki-faint); }
.chip[aria-pressed="true"] { background: var(--signal); color: var(--olive-deep); border-color: var(--signal); }
.chip[aria-pressed="true"] .chip__sub { color: var(--olive-deep); }
#directions .chip { align-items: center; justify-content: center; font-weight: 700; }

.select { width: 100%; max-width: 320px; padding: 0 10px; background: var(--olive-deep); }

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 20px; }
.btn { padding: 0 22px; font-family: var(--head); text-transform: uppercase; letter-spacing: 0.06em; }
.btn--go { background: var(--signal); color: var(--olive-deep); border-color: var(--signal); font-size: 20px; padding: 0 36px; min-height: 60px; }
.btn:disabled { opacity: 0.45; cursor: default; }
.is-playing .btn--go { opacity: 0.7; }

.chip:focus-visible, .btn:focus-visible, .select:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 3px;
}

.readout { margin: 16px 0 0; min-height: 1.5em; font-size: 18px; color: var(--khaki); }
.hint { margin: 0; color: var(--khaki-dim); }
.footnote { color: var(--khaki-dim); font-size: 14px; max-width: 70ch; }

/* ---------- Game (stage 1) ---------- */
a { color: inherit; }
.muted { color: var(--khaki-dim); }
.note { border: 2px dashed var(--khaki-dim); padding: 10px 14px; margin: 14px 0 0; }
.note--good { border-color: var(--signal); color: var(--signal); }

.head--row { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; }
.tally { border: 2px solid var(--khaki); background: var(--olive-dark); padding: 8px 14px; display: flex; flex-direction: column; }
.tally__label { font-size: 13px; color: var(--khaki-dim); text-transform: uppercase; letter-spacing: 0.1em; }
.tally__value { display: flex; align-items: center; gap: 6px; font-family: var(--head); font-size: 22px; }

.stars { display: inline-flex; gap: 3px; vertical-align: middle; }
.star path { fill: none; stroke: var(--khaki-faint); stroke-width: 1.6; }
.star--on path { fill: var(--signal); stroke: var(--signal); }

.sector { margin-bottom: 28px; }
.sector__title { font-family: var(--head); font-size: 17px; letter-spacing: 0.08em; text-transform: uppercase; margin: 0 0 12px; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.card {
  position: relative; display: flex; flex-direction: column; gap: 6px; min-height: 120px; padding: 14px;
  border: 2px solid var(--khaki); background: var(--olive-dark); text-decoration: none; color: var(--khaki);
}
a.card:hover { background: #46501f; }
a.card:focus-visible { outline: 3px solid var(--signal); outline-offset: 3px; }
.card--next { border: 3px solid var(--signal); }
.card--locked { border-style: dashed; border-color: var(--khaki-dim); color: var(--khaki-dim); background: transparent; }
.card__id { font-family: var(--head); font-size: 26px; line-height: 1; }
.card__title { font-weight: 700; }
.card__lock { font-size: 14px; text-transform: uppercase; letter-spacing: 0.1em; margin-top: auto; }
.card .stars { margin-top: auto; }
.card__flag { position: absolute; top: 10px; right: 10px; background: var(--signal); color: var(--olive-deep); font-size: 12px; font-weight: 700; padding: 2px 8px; text-transform: uppercase; letter-spacing: 0.1em; }

.briefing__kicker { margin: 0; color: var(--signal); letter-spacing: 0.12em; text-transform: uppercase; font-size: 13px; }
.briefing h1, .results h1 { margin-top: 8px; }
.briefing__answers { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 16px; }
.tag { border: 2px solid var(--khaki); padding: 2px 10px; font-weight: 700; }
.briefing__best { display: flex; align-items: center; gap: 8px; margin: 14px 0 0; }

.btn { display: inline-flex; align-items: center; justify-content: center; text-decoration: none; }
.btn--ghost { font-family: var(--mono); text-transform: none; letter-spacing: 0; }
.btn--small { min-height: 44px; padding: 0 14px; font-size: 15px; }
.actions--end { justify-content: flex-end; }

/* Radio check */
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 18px; }
.topbar__progress { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.topbar__count { font-size: 14px; color: var(--khaki-dim); }
.topbar__mission { font-size: 14px; color: var(--khaki-dim); }
.blocks { display: flex; gap: 4px; }
.block { width: 22px; height: 12px; border: 1.5px solid var(--khaki-faint); }
.block--right { background: var(--khaki); border-color: var(--khaki); }
.block--half { background: linear-gradient(90deg, var(--khaki) 50%, transparent 50%); border-color: var(--khaki); }
.block--miss { border-color: var(--khaki-faint); background: repeating-linear-gradient(45deg, transparent 0 3px, var(--khaki-faint) 3px 4px); }
.block--now { background: var(--signal); border-color: var(--signal); }

.radio { display: flex; border: 2px solid var(--khaki); background: #353B1A; min-height: 170px; }
.replay {
  flex: 0 0 140px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px;
  background: var(--signal); color: var(--olive-deep); border: none; border-right: 2px solid var(--khaki);
  font-family: var(--head); text-transform: uppercase; letter-spacing: 0.06em; font-size: 16px; cursor: pointer;
}
.replay:disabled { opacity: 0.6; cursor: default; }
.replay:focus-visible { outline: 3px solid var(--khaki); outline-offset: -6px; }
.replay__icon { width: 0; height: 0; border-top: 18px solid transparent; border-bottom: 18px solid transparent; border-left: 30px solid var(--olive-deep); margin-left: 8px; }
.radio__screen { flex: 1; padding: 14px 18px; display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.radio__label { font-size: 13px; letter-spacing: 0.14em; color: var(--signal); text-transform: uppercase; }
.lamps { display: flex; justify-content: center; align-items: center; gap: clamp(28px, 8vw, 90px); flex: 1; padding: 6px 0; }
.lamp { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.lamp__light { width: 64px; height: 64px; border-radius: 50%; border: 3px solid var(--khaki-dim); background: #2A2E12; transition: background 0.08s, box-shadow 0.08s; }
.lamp__label { font-size: 13px; color: var(--khaki-dim); letter-spacing: 0.1em; text-transform: uppercase; }
.lamp--on .lamp__light { background: var(--signal); border-color: var(--signal); box-shadow: 0 0 18px rgba(242, 193, 78, 0.7); }
.lamp--on .lamp__label { color: var(--signal); }
@media (max-width: 560px) { .lamp__light { width: 44px; height: 44px; } }

.prompt { font-size: clamp(24px, 4.5vw, 34px); margin: 24px 0 14px; }
.crates { display: grid; gap: 14px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.crates--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.crates--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (min-width: 760px) { .crates--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
@media (max-width: 480px) { .crates--3 { grid-template-columns: 1fr; } }
.crate {
  min-height: 110px; padding: 14px; display: flex; flex-direction: column; align-items: flex-start; justify-content: space-between;
  background: var(--olive-dark); color: var(--khaki); border: 2px solid var(--khaki); cursor: pointer; font: inherit; text-align: left;
}
.crate:disabled { cursor: default; }
.crate:not(:disabled):hover { background: #46501f; }
.crate:focus-visible { outline: 3px solid var(--signal); outline-offset: 3px; }
.crate__tag { font-size: 13px; color: var(--khaki-dim); }
.crate__label { font-family: var(--head); font-size: clamp(20px, 3.4vw, 26px); text-transform: uppercase; letter-spacing: 0.02em; }
.crate--right { background: var(--signal); color: var(--olive-deep); border-color: var(--signal); }
.crate--right .crate__tag { color: var(--olive-deep); }
.crate--reveal { border: 3px solid var(--signal); box-shadow: 0 0 0 3px rgba(242, 193, 78, 0.25); }
.crate--reveal:not(:disabled) { animation: nudge 1.4s ease-in-out infinite; }
@keyframes nudge { 50% { box-shadow: 0 0 0 7px rgba(242, 193, 78, 0.35); } }
@media (prefers-reduced-motion: reduce) { .crate--reveal:not(:disabled) { animation: none; } }
.crate--wrong { opacity: 0.45; border-style: dashed; }
.crate--removed { visibility: hidden; }
.feedback { min-height: 1.6em; font-size: 18px; margin: 16px 0 0; }

/* Results */
.results__stars { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; margin: 12px 0; }
.results__label { font-family: var(--head); font-size: 28px; text-transform: uppercase; }
.results__score { font-size: 20px; margin: 0; }
.results__tricky { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

@media (max-width: 560px) {
  .topbar__progress { order: 3; width: 100%; align-items: flex-start; }
  .replay { flex-basis: 96px; font-size: 14px; }
  .radio { min-height: 130px; }
  .crate { min-height: 76px; }
  .wrap { padding-top: 20px; }
}


.feedback--old { opacity: 0.55; }
.radio__screen { position: relative; }
/* Caption floats over the bottom of the radio panel so it never moves anything. */
.radio__caption { position: absolute; top: 14px; right: 18px; font-size: 13px; letter-spacing: 0.08em; color: var(--khaki); text-align: right; pointer-events: none; }

.test-switch { display: flex; align-items: center; gap: 10px; margin-top: 16px; padding: 10px 14px; border: 2px dashed var(--signal); color: var(--signal); font-size: 15px; cursor: pointer; width: fit-content; }
.test-switch input { width: 22px; height: 22px; accent-color: #F2C14E; }

.actions--split { justify-content: space-between; align-items: center; }
.diff[hidden] { display: none; }
.crate--playing { outline: 4px solid var(--signal); outline-offset: 2px; }

@media (max-width: 560px) { .radio__caption { top: auto; bottom: 6px; font-size: 12px; } }