/* ============================================================
   The Tower of Babel — UI styling
   The stage is 480x270 "world pixels" scaled to fit the window.
   --u = size of one world pixel in CSS px (set by game.js).
   ============================================================ */

:root {
  --u: 2px;
  --font: 'Pixelify Sans', 'Trebuchet MS', 'Segoe UI', sans-serif;
  --ink: #2b1d12;
  --paper: #f7ecd2;
  --paper-dark: #e5d2a8;
  --gold: #e0b83a;
  --gold-dark: #9a7a1e;
  --brick: #b8865a;
  --brick-dark: #7a5230;
  --green: #4caf50;
  --red: #c0392b;
}

* { box-sizing: border-box; }
html, body {
  margin: 0; height: 100%; background: #0e0a14;
  font-family: var(--font); color: var(--ink);
  overflow: hidden; touch-action: manipulation; -webkit-tap-highlight-color: transparent;
  user-select: none; -webkit-user-select: none;
}

#stage {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: calc(var(--u) * 480); height: calc(var(--u) * 270);
  background: #000; overflow: hidden;
  box-shadow: 0 0 0 calc(var(--u) * 2) #2b1d12, 0 0 calc(var(--u) * 20) #000;
}
#world {
  position: absolute; inset: 0; width: 100%; height: 100%;
  image-rendering: pixelated; image-rendering: crisp-edges;
}
#ui { position: absolute; inset: 0; pointer-events: none; }
#ui > * { pointer-events: auto; }
#fade { pointer-events: none; }

/* ---------- buttons ---------- */
button {
  font-family: var(--font); font-weight: 700; color: var(--ink);
  background: var(--paper); border: calc(var(--u) * 1.5) solid var(--ink);
  border-radius: calc(var(--u) * 3);
  box-shadow: 0 calc(var(--u) * 2) 0 var(--ink);
  padding: calc(var(--u) * 3) calc(var(--u) * 6);
  font-size: calc(var(--u) * 7); cursor: pointer; line-height: 1.1;
  transition: transform .06s;
}
button:active { transform: translateY(calc(var(--u) * 2)); box-shadow: 0 0 0 var(--ink); }
button.big { font-size: calc(var(--u) * 9); padding: calc(var(--u) * 4) calc(var(--u) * 10); }
button.primary { background: var(--gold); }
button:disabled { opacity: .55; cursor: default; }
button.pulse { animation: pulse 1s ease-in-out infinite; }
@keyframes pulse { 0%,100% { transform: scale(1);} 50% { transform: scale(1.06);} }

/* ---------- full screens ---------- */
.screen {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
}
.title-box {
  text-align: center; background: rgba(43,29,18,.82); color: var(--paper);
  border: calc(var(--u) * 1.5) solid var(--gold); border-radius: calc(var(--u) * 4);
  padding: calc(var(--u) * 8) calc(var(--u) * 14);
  box-shadow: 0 0 calc(var(--u) * 12) rgba(0,0,0,.6);
}
.title-box .kicker { font-size: calc(var(--u) * 6); color: var(--gold); letter-spacing: .05em; }
.title-box h1 {
  margin: calc(var(--u) * 2) 0; font-size: calc(var(--u) * 22); line-height: 1;
  color: #fff; text-shadow: calc(var(--u) * 1) calc(var(--u) * 1) 0 var(--gold-dark), calc(var(--u) * 2) calc(var(--u) * 2) 0 #000;
}
.title-box .sub { font-size: calc(var(--u) * 7); margin-bottom: calc(var(--u) * 8); }

/* ---------- HUD ---------- */
#hud {
  position: absolute; left: calc(var(--u) * 4); top: calc(var(--u) * 4);
  background: rgba(43,29,18,.85); color: var(--paper); border: calc(var(--u) * 1) solid var(--gold);
  border-radius: calc(var(--u) * 2); padding: calc(var(--u) * 2) calc(var(--u) * 4);
  font-size: calc(var(--u) * 6); line-height: 1.2;
}
#hud .hud-level { color: var(--gold); font-weight: 700; }
#btn-quiz { position: absolute; left: 50%; top: calc(var(--u) * 12); transform: translateX(-50%); }
#btn-quiz.pulse { animation: pulseCenter 1s ease-in-out infinite; }
@keyframes pulseCenter { 0%,100% { transform: translateX(-50%) scale(1);} 50% { transform: translateX(-50%) scale(1.06);} }

#btn-mute {
  position: absolute; right: calc(var(--u) * 4); top: calc(var(--u) * 4);
  font-size: calc(var(--u) * 7); padding: calc(var(--u) * 1.5) calc(var(--u) * 3);
}

/* ---------- dialog ---------- */
#dialog {
  position: absolute; left: calc(var(--u) * 8); right: calc(var(--u) * 8); bottom: calc(var(--u) * 6);
  display: flex; align-items: stretch; gap: calc(var(--u) * 4);
  background: var(--paper); border: calc(var(--u) * 1.5) solid var(--ink);
  border-radius: calc(var(--u) * 3); padding: calc(var(--u) * 4);
  box-shadow: 0 calc(var(--u) * 3) 0 var(--ink), inset 0 0 0 calc(var(--u) * 1) var(--paper-dark);
  min-height: calc(var(--u) * 44);
}
#dialog .portrait {
  width: calc(var(--u) * 32); height: calc(var(--u) * 32); flex: 0 0 auto;
  image-rendering: pixelated; background: var(--paper-dark);
  border: calc(var(--u) * 1) solid var(--ink); border-radius: calc(var(--u) * 2);
}
#dialog .dlg-body { flex: 1; display: flex; flex-direction: column; }
#dialog .who { font-size: calc(var(--u) * 6); color: var(--brick-dark); font-weight: 700; }
#dialog .text { font-size: calc(var(--u) * 8.5); line-height: 1.25; margin-top: calc(var(--u) * 1); }
#dialog .next { align-self: flex-end; font-size: calc(var(--u) * 9); padding: calc(var(--u) * 2) calc(var(--u) * 5); animation: bob 1s ease-in-out infinite; }
@keyframes bob { 0%,100% { translate: 0 0; } 50% { translate: 0 calc(var(--u) * -1.5); } }

/* ---------- info card ---------- */
#card, #quiz {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,.45);
}
.card-box {
  width: calc(var(--u) * 300); max-height: calc(var(--u) * 250);
  background: var(--paper); border: calc(var(--u) * 1.5) solid var(--ink);
  border-radius: calc(var(--u) * 4); padding: calc(var(--u) * 5);
  box-shadow: 0 calc(var(--u) * 3) 0 var(--ink);
  display: flex; flex-direction: column; gap: calc(var(--u) * 3);
  animation: pop .18s ease-out;
}
@keyframes pop { from { transform: scale(.85); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.card-box .img {
  position: relative; height: calc(var(--u) * 100); background: var(--paper-dark);
  border: calc(var(--u) * 1) solid var(--brick-dark); border-radius: calc(var(--u) * 2); overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.card-box .img img { max-width: 100%; max-height: 100%; object-fit: contain; display: block; }
.card-box .img img[hidden] { display: none; }
.card-box .placeholder {
  display: flex; flex-direction: column; align-items: center; gap: calc(var(--u) * 2);
  font-size: calc(var(--u) * 5); color: var(--brick-dark);
}
.card-box .placeholder canvas { width: calc(var(--u) * 64); height: calc(var(--u) * 64); image-rendering: pixelated; }
.card-box .placeholder[hidden] { display: none; }
.card-box .credit {
  position: absolute; left: 0; right: 0; bottom: 0; padding: calc(var(--u) * 1) calc(var(--u) * 2);
  font-size: calc(var(--u) * 3.6); color: #fff; background: rgba(0,0,0,.55); text-align: right;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.card-box .credit:empty { display: none; }
.card-box h2 { margin: 0; font-size: calc(var(--u) * 10); color: var(--brick-dark); }
.card-box p { margin: 0; font-size: calc(var(--u) * 7.5); line-height: 1.3; }
.card-box .row { display: flex; justify-content: space-between; align-items: center; gap: calc(var(--u) * 3); }

/* ---------- quiz ---------- */
.q-box {
  width: calc(var(--u) * 340);
  background: var(--paper); border: calc(var(--u) * 1.5) solid var(--ink);
  border-radius: calc(var(--u) * 4); padding: calc(var(--u) * 6);
  box-shadow: 0 calc(var(--u) * 3) 0 var(--ink);
  display: flex; flex-direction: column; gap: calc(var(--u) * 4);
  animation: pop .18s ease-out;
}
.q-text { font-size: calc(var(--u) * 9.5); line-height: 1.25; text-align: center; font-weight: 700; }
.answers { display: flex; flex-direction: column; gap: calc(var(--u) * 3); }
.answers button {
  font-size: calc(var(--u) * 8.5); text-align: left; display: flex; align-items: center; gap: calc(var(--u) * 3);
  padding: calc(var(--u) * 3) calc(var(--u) * 5);
}
.answers button .letter {
  flex: 0 0 auto; width: calc(var(--u) * 12); height: calc(var(--u) * 12); border-radius: 50%;
  background: var(--gold); border: calc(var(--u) * 1) solid var(--ink);
  display: inline-flex; align-items: center; justify-content: center; font-size: calc(var(--u) * 7);
}
.answers button.right { background: #b9e5b0; }
.answers button.nope { background: #f0c2bd; animation: shake .35s; }
@keyframes shake { 0%,100%{translate:0} 25%{translate:calc(var(--u)*-3) 0} 75%{translate:calc(var(--u)*3) 0} }
.feedback { min-height: calc(var(--u) * 10); text-align: center; font-size: calc(var(--u) * 9); font-weight: 700; }
.feedback.good { color: #2e7d32; }
.feedback.bad { color: var(--red); }

/* ---------- fade ---------- */
#fade { position: absolute; inset: 0; background: #000; opacity: 0; pointer-events: none; transition: opacity .5s; }
#fade.on { opacity: 1; pointer-events: auto; }

[hidden] { display: none !important; }

.answers button.reading { outline: calc(var(--u) * 1.5) solid var(--gold-dark); background: #fff3c4; }

/* ---------- portrait phones: ask for landscape ---------- */
#rotate {
  display: none; position: fixed; inset: 0; z-index: 50; background: #0e0a14; color: #f7ecd2;
  align-items: center; justify-content: center; text-align: center; font-size: 6vw; line-height: 1.4; padding: 8vw;
}
@media (orientation: portrait) and (max-width: 700px) { #rotate { display: flex; } }