/* CuriosityQuest — multi-subject explorer for ages 9–11
   Visual language: deep ocean indigo background, parchment cards,
   per-island accent palette set via CSS vars at runtime. */
:root {
  --bg-1: #0c1a3a;
  --bg-2: #1d3a72;
  --bg-3: #2c4d99;
  --paper: #fdf6e3;
  --paper-dark: #ede4c5;
  --ink: #1a1f3a;
  --accent: #ffc83d;
  --accent-2: #ff7b6b;
  --good: #4eb86b;
  --bad: #e85a4f;
  --info: #5aa9e6;
  --gold: #ffc83d;
  --shadow: 0 4px 0 rgba(0,0,0,0.25);
  --island-color: #ffc83d;
  --island-color-2: #ff7b6b;
}

/* Per-island theme classes */
.theme-stargazer { --island-color: #8a7bff; --island-color-2: #c5b3ff; }
.theme-atlas     { --island-color: #2bb59a; --island-color-2: #7be3cd; }
.theme-chronicle { --island-color: #e0a04a; --island-color-2: #f4c97a; }
.theme-wordsmith { --island-color: #e96a8d; --island-color-2: #ffb0c2; }

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body {
  margin: 0; padding: 0; height: 100%;
  font-family: "Baloo 2", "Segoe UI", "Trebuchet MS", system-ui, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(ellipse at 20% 0%, rgba(94,140,255,0.25) 0%, transparent 55%),
    radial-gradient(ellipse at 80% 100%, rgba(255,200,61,0.18) 0%, transparent 55%),
    linear-gradient(180deg, var(--bg-1) 0%, var(--bg-2) 60%, var(--bg-3) 100%);
  overflow: hidden; user-select: none;
  touch-action: manipulation;
}
#app {
  height: 100%; display: flex; flex-direction: column;
  max-width: 960px; margin: 0 auto; position: relative;
}

/* HUD */
.hud {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px;
  background: rgba(8,16,40,0.85);
  border-bottom: 2px solid rgba(255,255,255,0.08);
  z-index: 10;
}
.hud.hidden { display: none; }
.hud-stats { display: flex; gap: 10px; font-size: 17px; font-weight: 700; color: white; }
.stat { background: rgba(255,255,255,0.12); padding: 5px 12px; border-radius: 999px; }
.hud-tools { display: flex; gap: 6px; }
.icon-btn {
  background: var(--accent); border: none;
  font-size: 20px; width: 44px; height: 44px;
  border-radius: 12px; box-shadow: var(--shadow);
  cursor: pointer; color: var(--ink);
}
.icon-btn:active { transform: translateY(2px); box-shadow: 0 1px 0 rgba(0,0,0,0.25); }

/* Screens */
#screens { flex: 1; position: relative; overflow: hidden; }
.screen {
  position: absolute; inset: 0;
  display: none; flex-direction: column;
  padding: 16px;
  overflow-y: auto;
  color: white;
}
.screen.active { display: flex; }
.screen-title {
  text-align: center; font-size: 28px;
  margin: 4px 0 16px; color: var(--accent);
  text-shadow: 0 2px 0 rgba(0,0,0,0.3);
  letter-spacing: 0.5px;
}

/* Welcome */
.welcome-card {
  margin: auto; text-align: center;
  background: var(--paper); color: var(--ink);
  padding: 32px 24px; border-radius: 24px;
  box-shadow: var(--shadow);
  border: 3px solid var(--accent);
  max-width: 420px;
}
.big-mascot { display: flex; justify-content: center; }
.welcome-card h1 { font-size: 42px; margin: 6px 0; color: var(--bg-1); letter-spacing: 1px; }
.subtitle { font-size: 17px; margin: 0 0 12px; color: var(--bg-2); font-weight: 700; }
.lore { font-size: 15px; font-style: italic; margin: 16px 0; color: #555; line-height: 1.5; }

.primary-btn {
  background: var(--accent-2); color: white;
  border: none; font-size: 22px; font-weight: 700;
  padding: 14px 32px; border-radius: 14px;
  box-shadow: 0 5px 0 #b54a3e;
  cursor: pointer; font-family: inherit;
  margin: 8px;
}
.primary-btn:active { transform: translateY(3px); box-shadow: 0 2px 0 #b54a3e; }
.text-btn {
  background: transparent; border: none;
  color: var(--bg-2); font-size: 14px;
  text-decoration: underline; cursor: pointer; font-family: inherit;
  margin-top: 10px;
}

/* Island map */
.island-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  max-width: 880px; width: 100%; margin: 0 auto;
}
.island-card {
  background: linear-gradient(135deg, var(--paper), var(--paper-dark));
  color: var(--ink);
  border-radius: 20px; padding: 16px 18px 18px;
  box-shadow: var(--shadow);
  border: 3px solid var(--island-color);
  cursor: pointer;
  transition: transform 0.15s;
  position: relative;
  overflow: hidden;
}
.island-card:active { transform: scale(0.98); }
.island-hero {
  background: linear-gradient(180deg, var(--island-color-2), var(--island-color));
  border-radius: 14px;
  height: 110px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  margin-bottom: 10px;
}
.island-hero svg { width: 100%; height: 100%; }
.island-name { font-size: 22px; font-weight: 800; margin: 4px 0 2px; color: var(--ink); }
.island-subject { font-size: 13px; color: #666; text-transform: uppercase; letter-spacing: 1px; font-weight: 700; }
.island-desc { font-size: 14px; color: #555; margin: 6px 0 8px; line-height: 1.4; }
.island-progress {
  height: 8px; background: rgba(0,0,0,0.1); border-radius: 4px; overflow: hidden;
  margin-top: 8px;
}
.island-progress-fill {
  height: 100%; background: var(--island-color); transition: width 0.4s;
}
.island-meta {
  font-size: 12px; color: #666; margin-top: 6px;
  display: flex; justify-content: space-between;
}
.codex-hint { text-align: center; margin-top: 14px; opacity: 0.7; font-size: 14px; }

/* Quest list */
.quest-list {
  display: flex; flex-direction: column; gap: 10px;
  max-width: 600px; width: 100%; margin: 0 auto;
}
.quest-item {
  background: var(--paper); color: var(--ink);
  padding: 14px 18px;
  border-radius: 14px; box-shadow: var(--shadow);
  display: flex; align-items: center; gap: 14px;
  cursor: pointer; border: 3px solid transparent;
}
.quest-item:active { transform: translateY(2px); }
.quest-item.completed { border-color: var(--good); }
.quest-num {
  font-size: 22px; font-weight: 800; color: var(--island-color);
  min-width: 36px; text-align: center;
}
.quest-info { flex: 1; }
.quest-title { font-weight: 700; font-size: 16px; }
.quest-sub { font-size: 12px; color: #666; margin-top: 2px; }
.quest-stars { color: var(--gold); font-size: 18px; letter-spacing: 2px; }

/* Play */
.play-header {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 10px;
}
.progress-bar {
  flex: 1; height: 14px;
  background: rgba(255,255,255,0.15);
  border-radius: 7px; overflow: hidden;
  border: 1px solid rgba(255,255,255,0.25);
}
#progressFill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--good), #6dd285);
  transition: width 0.4s;
}
.play-tools { display: flex; gap: 6px; }
.tool-btn {
  width: 38px; height: 38px;
  border-radius: 10px; border: none;
  background: rgba(255,255,255,0.15); color: white;
  font-size: 16px; cursor: pointer;
}
.tool-btn:active { transform: translateY(2px); }
.tool-btn.active { background: var(--accent); color: var(--ink); }

.scene-container {
  background: rgba(255,255,255,0.07);
  border-radius: 16px;
  min-height: 200px; max-height: 280px;
  margin-bottom: 12px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.12);
  position: relative;
}
.scene-container svg { max-width: 100%; max-height: 270px; }

.question-text {
  text-align: center;
  font-size: 19px; font-weight: 700;
  color: white;
  background: rgba(255,255,255,0.08);
  padding: 12px 16px;
  border-radius: 12px;
  margin-bottom: 14px;
  line-height: 1.4;
}

.choices {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  max-width: 560px; width: 100%;
  margin: 0 auto;
}
.choice-btn {
  background: var(--paper); color: var(--ink);
  border: 3px solid var(--paper);
  border-radius: 14px;
  padding: 16px 14px;
  font-size: 18px; font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  box-shadow: var(--shadow);
  min-height: 64px;
  transition: transform 0.1s;
  text-align: center;
  line-height: 1.3;
}
.choice-btn:active:not(:disabled) { transform: translateY(2px); }
.choice-btn:disabled { cursor: not-allowed; }
.choice-btn.correct { background: var(--good); color: white; border-color: #2e8b50; animation: pulse 0.4s; }
.choice-btn.wrong { background: var(--bad); color: white; border-color: #a83e36; animation: shake 0.4s; }
.choice-btn.faded { opacity: 0.4; }

.explain-box {
  background: rgba(255, 200, 61, 0.18);
  border-left: 4px solid var(--accent);
  padding: 12px 14px;
  border-radius: 8px;
  margin-top: 14px;
  font-size: 15px;
  color: white;
  line-height: 1.5;
}
.explain-box.hidden { display: none; }
.explain-box.good { background: rgba(78, 184, 107, 0.22); border-color: var(--good); }

/* Reward */
.reward-card {
  margin: auto;
  background: var(--paper); color: var(--ink);
  padding: 28px;
  border-radius: 24px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 3px solid var(--accent);
  max-width: 520px; width: 100%;
}
.reward-card h2 { color: var(--accent-2); margin: 0 0 8px; font-size: 28px; }
.reward-stars { font-size: 44px; letter-spacing: 8px; color: var(--gold); margin: 6px 0 10px; }
.wonder-card {
  background: linear-gradient(135deg, #fff8e0, #ffe9b3);
  border: 2px dashed #c89a3d;
  border-radius: 16px;
  padding: 16px;
  margin: 12px 0;
}
.wonder-card .wc-label {
  font-size: 12px; color: #8a6020; text-transform: uppercase; letter-spacing: 2px; font-weight: 800;
}
.wonder-card .wc-title { font-size: 20px; font-weight: 800; color: #5a3d10; margin: 4px 0; }
.wonder-card .wc-text { font-size: 15px; color: #4a3520; line-height: 1.5; }
.reward-items {
  text-align: left;
  background: rgba(0,0,0,0.05);
  padding: 12px 16px;
  border-radius: 10px;
  margin: 12px 0;
}
.reward-items div { margin: 4px 0; font-size: 15px; }

/* Codex */
.codex-content {
  flex: 1;
  background: var(--paper); color: var(--ink);
  padding: 16px;
  border-radius: 16px;
  overflow-y: auto;
  box-shadow: var(--shadow);
}
.codex-island {
  border-bottom: 1px dashed #aaa;
  padding: 12px 0;
}
.codex-island:last-child { border-bottom: none; }
.codex-island h3 { margin: 0 0 8px; color: var(--bg-2); }
.codex-card-mini {
  background: linear-gradient(135deg, #fff8e0, #ffe9b3);
  border-radius: 8px;
  padding: 8px 12px;
  margin: 6px 0;
  font-size: 14px;
  color: #4a3520;
  border-left: 3px solid #c89a3d;
}
.codex-card-mini b { color: #5a3d10; }
.codex-empty { color: #999; font-style: italic; padding: 8px 0; }

/* Parent */
.parent-content {
  flex: 1;
  background: var(--paper); color: var(--ink);
  padding: 16px;
  border-radius: 16px;
  overflow-y: auto;
  box-shadow: var(--shadow);
}
.parent-section { margin-bottom: 18px; }
.parent-section h3 {
  margin: 0 0 8px;
  color: var(--bg-2);
  border-bottom: 2px solid var(--accent);
  padding-bottom: 4px;
}
.skill-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 6px 0;
  font-size: 14px;
}
.skill-row .skill-name { flex: 1; }
.skill-bar-wrap {
  flex: 1; max-width: 180px;
  height: 8px; background: #ddd; border-radius: 4px; overflow: hidden;
  margin: 0 10px;
}
.skill-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--info), var(--good));
  transition: width 0.4s;
}
.mastered-tag {
  background: var(--good); color: white;
  padding: 1px 8px; border-radius: 999px;
  font-size: 11px; font-weight: 700;
}

/* SVG scene helpers */
.scene-tap { cursor: pointer; transition: filter 0.15s, transform 0.15s; transform-origin: center; transform-box: fill-box; }
.scene-tap:hover { filter: brightness(1.1); transform: scale(1.05); }
.scene-label {
  font-family: inherit; font-size: 14px; font-weight: 700;
  fill: white; text-anchor: middle; dominant-baseline: central;
  pointer-events: none;
}
.scene-label-dark { fill: #1a1f3a; }

/* Animations */
@keyframes pulse {
  0%,100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}
@keyframes shake {
  0%,100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}
@keyframes orbit-spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
@keyframes drift {
  0%,100% { transform: translateX(0); }
  50% { transform: translateX(8px); }
}
@keyframes float-y {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}
.spin-slow { animation: orbit-spin 16s linear infinite; transform-origin: center; transform-box: fill-box; }
.spin-med  { animation: orbit-spin 9s linear infinite;  transform-origin: center; transform-box: fill-box; }
.spin-fast { animation: orbit-spin 5s linear infinite;  transform-origin: center; transform-box: fill-box; }
.drift-x   { animation: drift 4s ease-in-out infinite; }
.float-y   { animation: float-y 3s ease-in-out infinite; }

/* Sparkles on correct */
.sparkle {
  position: absolute; pointer-events: none;
  font-size: 22px; opacity: 0;
  animation: sparkle 1.2s ease-out forwards;
}
@keyframes sparkle {
  0% { opacity: 0; transform: scale(0) rotate(0); }
  30% { opacity: 1; transform: scale(1.4) rotate(180deg); }
  100% { opacity: 0; transform: scale(0.5) translateY(-40px) rotate(360deg); }
}

@media (max-width: 520px) {
  .choices { grid-template-columns: 1fr; }
  .welcome-card h1 { font-size: 34px; }
  .island-list { grid-template-columns: 1fr; }
}