:root {
  color-scheme: dark;
  --dark-water: #041514;
  --signal-teal: #74e7d8;
  --soft-aqua: #a8d8cd;
  --bone-light: #f2ead8;
  --night: var(--dark-water);
  --deep: #071f1c;
  --moss: #17392b;
  --paper: #efe1bd;
  --paper-ink: #17251d;
  --cream: var(--bone-light);
  --gold: #c99a52;
  --copper: #a95f3f;
  --signal: var(--signal-teal);
  --muted: var(--soft-aqua);
  --line: rgba(201, 154, 82, .24);
}

* { box-sizing: border-box; }

html { min-height: 100%; background: var(--night); }

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--cream);
  background:
    radial-gradient(circle at 84% 7%, rgba(105, 198, 183, .13), transparent 23rem),
    radial-gradient(circle at 7% 85%, rgba(185, 104, 63, .15), transparent 27rem),
    var(--night);
  font-family: Arial, sans-serif;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  content: "";
  opacity: .13;
  background-image:
    linear-gradient(rgba(228, 180, 76, .24) 1px, transparent 1px),
    linear-gradient(90deg, rgba(228, 180, 76, .24) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, #000, transparent 92%);
}

body::after {
  position: fixed;
  top: -9rem;
  right: -7rem;
  z-index: -1;
  width: 28rem;
  height: 28rem;
  border: 1px solid rgba(105, 198, 183, .16);
  border-radius: 50%;
  box-shadow: 0 0 0 4rem rgba(105, 198, 183, .025), 0 0 0 8rem rgba(228, 180, 76, .025);
  content: "";
}

button, input { font: inherit; }
button { cursor: pointer; }
[hidden] { display: none !important; }

.skip-link {
  position: fixed;
  top: .6rem;
  left: .6rem;
  z-index: 99;
  padding: .65rem .85rem;
  color: var(--paper-ink);
  background: var(--paper);
  transform: translateY(-150%);
}

.skip-link:focus { transform: translateY(0); }

:focus-visible {
  outline: .22rem solid var(--signal);
  outline-offset: .25rem;
}

.masthead, .shell {
  width: min(76rem, calc(100% - 2rem));
  margin-inline: auto;
}

.masthead { padding: 1.25rem 0 clamp(2.25rem, 7vw, 5.5rem); }

.field-station-link, .back-button {
  color: var(--signal);
  text-decoration: none;
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .06em;
}

.eyebrow {
  margin: 0 0 .55rem;
  color: var(--gold);
  font-size: .7rem;
  font-weight: 900;
  letter-spacing: .17em;
  text-transform: uppercase;
}

.masthead .eyebrow { margin-top: clamp(2.5rem, 7vw, 5rem); }

h1, h2, h3 { font-family: Georgia, serif; }
h1 { margin: 0; font-size: clamp(3.5rem, 10vw, 8rem); line-height: .72; letter-spacing: -.055em; }
h1 em { color: var(--gold); font-weight: 400; }
h2 { margin: .15rem 0 .7rem; font-size: clamp(2rem, 5vw, 4rem); line-height: .95; }
h3 { font-size: 1.55rem; }
.lede { max-width: 34rem; margin-top: 1.75rem; color: var(--muted); font-size: 1.05rem; line-height: 1.55; }

.shell { padding-bottom: 5rem; }
.view { animation: field-arrival .32s ease both; }
.section-heading { max-width: 48rem; margin-bottom: 1.5rem; }

.door-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }

.door-card {
  position: relative;
  min-height: 22rem;
  overflow: hidden;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--line);
  border-radius: 1.35rem;
  color: var(--cream);
  background: linear-gradient(145deg, rgba(15, 48, 35, .95), rgba(3, 15, 10, .98));
  text-align: left;
  box-shadow: 0 1.8rem 5rem rgba(0, 0, 0, .28);
}

.door-card::after {
  position: absolute;
  right: -4rem;
  bottom: -4rem;
  width: 15rem;
  height: 15rem;
  border: 1px solid rgba(105, 198, 183, .25);
  border-radius: 50%;
  box-shadow: 0 0 0 2.5rem rgba(228, 180, 76, .035), 0 0 0 5rem rgba(105, 198, 183, .025);
  content: "";
}

.door-card:hover { border-color: var(--gold); transform: translateY(-.2rem); }
.door-number { display: block; color: var(--gold); font-size: .7rem; font-weight: 900; letter-spacing: .15em; text-transform: uppercase; }
.door-card strong { display: block; max-width: 8ch; margin: 5rem 0 1rem; font-family: Georgia, serif; font-size: clamp(2.2rem, 5vw, 4.2rem); line-height: .88; }
.door-card > span:not(.door-number) { display: block; max-width: 34rem; color: var(--muted); line-height: 1.55; }
.door-card b { display: block; margin-top: 2rem; color: var(--signal); font-size: .8rem; letter-spacing: .08em; text-transform: uppercase; }
.caller-door { border-color: rgba(185, 104, 63, .45); }
.local-boundary { margin: 1.25rem 0; color: rgba(255, 245, 218, .48); font-size: .78rem; }

.back-button, .quiet-button {
  border: 1px solid rgba(105, 198, 183, .3);
  border-radius: 999px;
  padding: .65rem .85rem;
  color: var(--signal);
  background: rgba(105, 198, 183, .06);
}

.back-button:hover, .quiet-button:hover:not(:disabled) { color: var(--night); background: var(--signal); }
.quiet-button:disabled { cursor: not-allowed; opacity: .38; }

.threshold-card {
  max-width: 58rem;
  margin: 1.5rem auto 0;
  padding: clamp(1.4rem, 5vw, 3.5rem);
  border: 1px solid rgba(185, 104, 63, .55);
  border-radius: 1.4rem;
  color: var(--paper-ink);
  background: linear-gradient(145deg, #f6e9c7, #d9c18d);
  box-shadow: 0 2rem 6rem rgba(0, 0, 0, .38);
  transform: rotate(-.35deg);
}

.threshold-card .eyebrow { color: #8f3f26; }
.threshold-card p { max-width: 48rem; line-height: 1.55; }
.threshold-card form { margin-top: 2rem; }
.threshold-card label { display: block; margin-bottom: .45rem; font-weight: 900; }
.input-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: .7rem; }
input {
  min-width: 0;
  border: 2px solid rgba(23, 37, 29, .42);
  border-radius: .8rem;
  padding: .95rem 1rem;
  color: var(--paper-ink);
  background: rgba(255, 255, 255, .55);
}
.threshold-card small { display: block; margin-top: .5rem; }
.error-message { min-height: 1.35em; margin-bottom: 0; color: #8d2b19; font-weight: 800; }

.signal-button {
  border: 0;
  border-radius: .8rem;
  padding: .95rem 1rem;
  color: var(--paper-ink);
  background: var(--gold);
  font-weight: 950;
  letter-spacing: .06em;
  text-transform: uppercase;
  box-shadow: 0 .5rem 1.4rem rgba(0, 0, 0, .18);
}
.signal-button:hover:not(:disabled) { background: var(--signal); }
.signal-button:disabled { cursor: not-allowed; opacity: .45; }

.instrument-bar { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-bottom: 1.3rem; color: var(--signal); font-size: .75rem; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.signal-dot { display: inline-block; width: .65rem; height: .65rem; margin-right: .45rem; border-radius: 50%; background: var(--signal); box-shadow: 0 0 1rem var(--signal); }
.card-heading { display: grid; grid-template-columns: minmax(0, 1fr) minmax(14rem, 28rem); gap: 2rem; align-items: end; margin-bottom: 1.2rem; }
.card-heading p:last-child { color: var(--muted); line-height: 1.5; }

.bingo-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: clamp(.25rem, 1vw, .55rem);
  width: min(100%, 62rem);
  margin-inline: auto;
}

.bingo-square {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  aspect-ratio: 1;
  overflow-wrap: anywhere;
  padding: clamp(.18rem, 1vw, .7rem);
  border: 1px solid rgba(228, 180, 76, .26);
  border-radius: clamp(.35rem, 1vw, .75rem);
  color: var(--cream);
  background: linear-gradient(145deg, rgba(15, 52, 37, .92), rgba(3, 15, 10, .98));
  font-size: clamp(.58rem, 1.25vw, .95rem);
  font-weight: 850;
  line-height: 1.08;
  text-align: center;
}

.bingo-square[data-marked="true"] {
  color: var(--night);
  background: linear-gradient(145deg, var(--signal), #3d907f);
  border-color: var(--signal);
  box-shadow: inset 0 0 0 2px rgba(255, 245, 218, .38), 0 0 1rem rgba(105, 198, 183, .15);
}

.bingo-square[data-marked="true"]::after {
  position: absolute;
  top: .22rem;
  right: .3rem;
  content: "✶";
  font-size: clamp(.55rem, 1.2vw, 1rem);
}

.bingo-square[data-kind="student"] {
  color: var(--paper-ink);
  background: linear-gradient(145deg, var(--paper), #d4b97f);
  border: 2px solid var(--copper);
  box-shadow: 0 .45rem 1rem rgba(0, 0, 0, .32);
  transform: rotate(-1deg);
}

.bingo-square[data-kind="student"]::before {
  position: absolute;
  bottom: .2rem;
  content: "CONTRABAND VALUE";
  color: #7b331f;
  font-size: clamp(.34rem, .62vw, .52rem);
  font-weight: 950;
  letter-spacing: .05em;
}

.smuggling-receipt { display: flex; align-items: center; gap: .8rem; width: min(100%, 62rem); margin: 1rem auto 0; padding: .85rem 1rem; border-left: 3px solid var(--copper); color: #f1c39d; background: rgba(185, 104, 63, .1); font-size: clamp(.65rem, 1.2vw, .82rem); letter-spacing: .07em; }
.smuggling-receipt span { font-size: 1.65rem; }
.sr-status { min-height: 1.2em; text-align: center; }
.bottom-back { display: block; margin: 1.5rem auto 0; }

.caller-layout { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(17rem, .65fr); gap: 1rem; }
.caller-console, .call-ledger { padding: clamp(1.2rem, 3vw, 2rem); border: 1px solid var(--line); border-radius: 1.35rem; background: linear-gradient(145deg, rgba(15, 48, 35, .95), rgba(3, 15, 10, .98)); box-shadow: 0 1.8rem 5rem rgba(0, 0, 0, .28); }
.caller-console > p:not(.eyebrow) { color: var(--muted); }
.current-signal { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 17rem; margin: 1.5rem 0 1rem; padding: 1.3rem; border: 1px solid rgba(105, 198, 183, .38); border-radius: 1.15rem; background: radial-gradient(circle at 50% 38%, rgba(105, 198, 183, .18), transparent 48%), rgba(3, 15, 10, .65); text-align: center; }
.current-signal span { color: var(--signal); font-size: .67rem; font-weight: 900; letter-spacing: .15em; text-transform: uppercase; }
.current-signal strong { display: block; margin: .7rem 0; font-family: Georgia, serif; font-size: clamp(2.5rem, 7vw, 5.5rem); line-height: .88; }
.current-signal em { color: var(--muted); font-size: .8rem; }
.transmit-button { width: 100%; }
.caller-controls { display: flex; justify-content: space-between; gap: .7rem; margin-top: .8rem; }
.call-ledger h3 { margin: .1rem 0 1rem; }
.call-ledger ol { display: grid; gap: .45rem; max-height: 25rem; margin: 0; padding: 0; overflow: auto; list-style: none; }
.call-ledger li { padding: .7rem .75rem; border: 1px solid rgba(255, 245, 218, .1); border-radius: .65rem; color: rgba(255, 245, 218, .8); background: rgba(255, 245, 218, .035); }
.empty-history { color: var(--muted) !important; font-style: italic; }
.signal-creature { display: flex; align-items: center; gap: .8rem; margin-top: 1.4rem; color: var(--muted); font-size: .76rem; line-height: 1.4; }
.signal-creature > span { display: grid; flex: 0 0 auto; place-items: center; width: 3.3rem; height: 3.3rem; border: 1px solid rgba(105, 198, 183, .25); border-radius: 50%; background: rgba(105, 198, 183, .08); font-size: 1.8rem; }
.signal-creature p { margin: 0; }

.bingo-dialog { width: min(42rem, calc(100% - 1.5rem)); padding: clamp(1.5rem, 5vw, 3.5rem); border: 1px solid var(--gold); border-radius: 1.4rem; color: var(--cream); background: radial-gradient(circle at 50% 0, rgba(228, 180, 76, .18), transparent 42%), var(--deep); box-shadow: 0 2rem 8rem rgba(0, 0, 0, .7); text-align: center; }
.bingo-dialog::backdrop { background: rgba(0, 8, 5, .82); backdrop-filter: blur(5px); }
.bingo-dialog h2 { font-size: clamp(2rem, 6vw, 4.2rem); }
.bingo-dialog p { line-height: 1.55; }
.bingo-burst { color: var(--gold); font-size: 4rem; animation: signal-burst .8s ease both; }
.camera-note { color: var(--muted); font-size: .85rem; }

@keyframes field-arrival { from { opacity: 0; transform: translateY(.5rem); } }
@keyframes signal-burst { 50% { transform: scale(1.25) rotate(12deg); text-shadow: 0 0 2rem var(--gold); } }

@media (max-width: 760px) {
  .door-grid, .caller-layout, .card-heading { grid-template-columns: 1fr; }
  .door-card { min-height: 18rem; }
  .door-card strong { margin-top: 3.5rem; }
  .input-row { grid-template-columns: 1fr; }
  .caller-layout { gap: .75rem; }
  .current-signal { min-height: 13rem; }
}

@media (max-width: 480px) {
  .masthead, .shell { width: min(100% - .8rem, 76rem); }
  .masthead { padding-top: .75rem; }
  h1 { font-size: clamp(3.3rem, 22vw, 5.7rem); }
  .bingo-grid { gap: .2rem; }
  .bingo-square { padding: .12rem; border-radius: .28rem; font-size: clamp(.47rem, 2.55vw, .69rem); }
  .bingo-square[data-kind="student"]::before { display: none; }
  .smuggling-receipt { align-items: flex-start; font-size: .61rem; }
  .instrument-bar { align-items: flex-start; }
  .caller-controls { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}