/* =========================================================================
   AQI Typing Adventure — sky-blue Alto's Odyssey theme
   ========================================================================= */

:root {
  --sky-0: #eaf5ff;
  --sky-1: #b3ddff;
  --sky-2: #6fb8ff;
  --sky-3: #2b6fb3;
  --sky-4: #1a4d80;
  --warm-1: #ffd9a8;
  --warm-2: #ff8f5c;
  --coral: #ef6f6c;
  --ink: #1c2a3a;
  --ink-soft: #4d5c6f;
  --paper: #f6faff;
  --paper-glass: rgba(246, 250, 255, 0.85);
  --line: rgba(28, 42, 58, 0.12);
  --shadow-lg: 0 20px 60px rgba(26, 77, 128, 0.18);
  --shadow-md: 0 8px 24px rgba(26, 77, 128, 0.12);
  --radius: 18px;
  --radius-sm: 10px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --dur: 500ms;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, var(--sky-0) 0%, var(--sky-1) 55%, var(--warm-1) 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

/* -------------------------------------------------------- Sky + clouds */
.sky-background {
  position: fixed; inset: 0; z-index: -1;
  background: linear-gradient(180deg, #eaf5ff 0%, #b3ddff 55%, #ffd9a8 100%);
  overflow: hidden;
}
.cloud {
  position: absolute;
  width: 260px; height: 90px;
  background: radial-gradient(ellipse at 30% 50%, rgba(255,255,255,0.9), rgba(255,255,255,0) 65%),
              radial-gradient(ellipse at 65% 55%, rgba(255,255,255,0.85), rgba(255,255,255,0) 60%),
              radial-gradient(ellipse at 50% 40%, rgba(255,255,255,0.85), rgba(255,255,255,0) 55%);
  filter: blur(2px);
  opacity: 0.65;
  animation: drift 60s linear infinite;
}
.cloud-a { top: 8%;  left: -30%; animation-duration: 70s; }
.cloud-b { top: 24%; left: -60%; width: 340px; height: 110px; animation-duration: 90s; opacity: 0.55; }
.cloud-c { top: 46%; left: -40%; width: 200px; height: 70px; animation-duration: 55s; opacity: 0.5; }

@keyframes drift {
  from { transform: translateX(0); }
  to   { transform: translateX(220vw); }
}

/* -------------------------------------------------------- Header + tabs */
.app-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 28px;
  background: rgba(255,255,255,0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 12px; color: var(--sky-4); }
.brand-icon { display: inline-flex; width: 36px; height: 36px; color: var(--sky-4); }
.brand-icon svg { width: 100%; height: 100%; }
.brand-title { font-weight: 700; font-size: 18px; letter-spacing: 0.2px; }

.tabs { display: flex; gap: 6px; }
.tab-btn {
  border: 0; background: transparent; color: var(--ink-soft);
  font: 500 14px 'Inter', sans-serif;
  padding: 10px 16px; border-radius: 999px; cursor: pointer;
  transition: color .2s, background .2s;
}
.tab-btn:hover { color: var(--sky-4); background: rgba(43,111,179,0.08); }
.tab-btn.is-active {
  color: white; background: linear-gradient(135deg, var(--sky-3), var(--sky-2));
  box-shadow: var(--shadow-md);
}

/* -------------------------------------------------------- Main + panels */
main { position: relative; }
.tab-panel { display: none; }
.tab-panel.is-active { display: block; }

.page { max-width: 1100px; margin: 0 auto; padding: 40px 28px 80px; }
.page-narrow { max-width: 760px; }
.page-title { font-size: 32px; margin: 0 0 6px; color: var(--sky-4); }
.page-sub { margin: 0 0 24px; color: var(--ink-soft); }

/* -------------------------------------------------------- Cards */
.card {
  background: var(--paper-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.6);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 28px;
}

/* -------------------------------------------------------- Buttons + inputs */
.btn {
  font: 600 15px 'Inter', sans-serif;
  border: 0; border-radius: 999px;
  padding: 11px 22px; cursor: pointer;
  transition: transform .12s var(--ease), box-shadow .2s var(--ease), background .2s;
}
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn:not(:disabled):hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn:not(:disabled):active { transform: translateY(0); }
.btn-primary {
  background: linear-gradient(135deg, var(--sky-3), var(--sky-2));
  color: white;
}
.btn-ghost {
  background: transparent;
  color: var(--sky-4);
  border: 1.5px solid rgba(43,111,179,0.35);
}
.btn-lg { padding: 14px 30px; font-size: 16px; }

.input, .state-select {
  font: 500 15px 'Inter', sans-serif;
  border: 1.5px solid rgba(43,111,179,0.25);
  border-radius: var(--radius-sm);
  padding: 11px 14px;
  background: white;
  color: var(--ink);
  transition: border-color .15s, box-shadow .15s;
  min-width: 200px;
}
.input:focus, .state-select:focus {
  outline: none;
  border-color: var(--sky-3);
  box-shadow: 0 0 0 3px rgba(111,184,255,0.35);
}

/* -------------------------------------------------------- Scene wrapper */
.scene {
  position: fixed; inset: 60px 0 0 0;
  display: none;
  opacity: 0;
  transform: translateY(20px);
}
.scene.is-active {
  display: block;
  opacity: 1;
  transform: translateY(0);
  animation: sceneIn var(--dur) var(--ease);
}
@keyframes sceneIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.scene-bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transform: scale(1.02);
  animation: bgFloat 12s ease-in-out infinite alternate;
}
.score-bg {
  background: linear-gradient(160deg, var(--sky-1), var(--warm-1) 90%);
}
@keyframes bgFloat {
  from { transform: scale(1.02) translateY(0); }
  to   { transform: scale(1.05) translateY(-8px); }
}
.scene-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.05) 0%, rgba(26,77,128,0.35) 100%);
}
.scene-content {
  position: relative;
  height: 100%;
  display: flex; align-items: center; justify-content: center;
  padding: 40px 24px;
  overflow-y: auto;
}

/* -------------------------------------------------------- Landing */
.landing-card { max-width: 560px; width: 100%; text-align: center; }
.landing-title { font-size: 30px; margin: 0 0 8px; color: var(--sky-4); }
.landing-sub { color: var(--ink-soft); margin: 0 0 24px; }
.landing-controls {
  display: flex; gap: 12px; justify-content: center; align-items: center;
  flex-wrap: wrap; margin-bottom: 20px;
}
.landing-hint { min-height: 20px; color: var(--sky-4); font-size: 14px; margin: 14px 0 0; }

/* -------------------------------------------------------- Intro / narrate */
.narrate-card { max-width: 620px; width: 100%; }
.scene-tag {
  text-transform: uppercase; letter-spacing: 0.14em;
  font-size: 12px; font-weight: 600; color: var(--sky-3);
  margin: 0 0 12px;
}
.narrate-body { font-size: 18px; line-height: 1.65; color: var(--ink); margin: 0 0 20px; }

/* -------------------------------------------------------- Typing layout (2/3/4) */
.typing-layout {
  display: grid;
  grid-template-columns: minmax(200px, 1fr) 5fr;
  gap: 24px;
  align-items: start;
  justify-content: unset;
  padding: 32px 28px 40px;
}

.kpi-panel {
  padding: 20px 18px;
  display: flex; flex-direction: column;
  gap: 14px;
  background: rgba(246,250,255,0.55);
  position: sticky; top: 20px;
}
.kpi-location { display: flex; flex-direction: column; gap: 4px; }
.kpi-location-label {
  text-transform: uppercase; letter-spacing: 0.14em;
  font-size: 10px; font-weight: 600; color: var(--ink-soft);
}
.kpi-location-value {
  font-size: 26px; font-weight: 700; color: var(--sky-4);
  letter-spacing: 0.01em; line-height: 1.15;
}
.kpi-divider {
  height: 1px; background: linear-gradient(90deg, transparent, var(--line), transparent);
  margin: 2px 0;
}
.kpi-row {
  display: flex; flex-direction: column; gap: 3px;
}
.kpi-label {
  text-transform: uppercase; letter-spacing: 0.1em;
  font-size: 10px; font-weight: 600; color: var(--ink-soft);
}
.kpi-value {
  font: 600 18px 'JetBrains Mono', monospace;
  color: var(--sky-4);
}

.typing-main {
  position: relative;
  display: flex; flex-direction: column; align-items: center;
  min-height: calc(100vh - 60px - 72px);
  justify-content: center;
}

.hud-stack {
  position: absolute; top: 0; right: 0;
  display: flex; flex-direction: column; align-items: flex-end; gap: 8px;
  z-index: 3;
}
.typing-hud {
  display: flex; gap: 14px; align-items: center;
  background: var(--paper-glass);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.hud-item { display: flex; flex-direction: column; align-items: center; min-width: 60px; }
.hud-label {
  font-size: 10px; text-transform: uppercase; letter-spacing: 0.15em;
  color: var(--ink-soft); font-weight: 600;
}
.hud-value {
  font: 600 20px 'JetBrains Mono', monospace;
  color: var(--sky-4);
}
.hud-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px;
  border: 0; border-radius: 50%;
  background: linear-gradient(135deg, var(--sky-3), var(--sky-2));
  color: white; cursor: pointer;
  transition: transform .12s var(--ease), box-shadow .2s var(--ease);
  box-shadow: 0 4px 12px rgba(43,111,179,0.35);
  margin-left: 4px;
}
.hud-btn:hover { transform: scale(1.08); box-shadow: 0 6px 16px rgba(43,111,179,0.45); }
.hud-btn:active { transform: scale(0.96); }

.typing-card {
  max-width: 760px; width: 100%;
  background: rgba(246,250,255,0.36);
}
.typing-text {
  font: 400 20px/1.7 'JetBrains Mono', monospace;
  padding: 20px 22px;
  background: rgba(255,255,255,0.26);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.55);
  min-height: 220px;
  outline: none;
  user-select: none;
  cursor: text;
  color: var(--ink-soft);
  white-space: pre-wrap;
  word-break: break-word;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.typing-text:focus { border-color: var(--sky-3); box-shadow: 0 0 0 3px rgba(111,184,255,0.3); }
.typing-text .ch { position: relative; transition: color .05s; }
.typing-text .ch.correct { color: var(--sky-4); }
.typing-text .ch.incorrect { color: var(--coral); background: rgba(239,111,108,0.14); border-radius: 3px; }
.typing-text .ch.current { color: var(--ink); }
.typing-text .ch.current::after {
  content: '';
  position: absolute; left: 0; right: 0; bottom: -3px; height: 2px;
  background: var(--sky-3);
  animation: caret 1s ease-in-out infinite;
}
@keyframes caret {
  0%, 50%   { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* -------------------------------------------------------- Pause overlay */
.pause-overlay {
  position: fixed; inset: 60px 0 0 0;
  background: rgba(26,77,128,0.35);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 20;
  display: flex; align-items: center; justify-content: center;
  animation: fadeIn .25s var(--ease);
}
.pause-overlay[hidden] { display: none; }
.pause-card {
  max-width: 460px; width: 90%; text-align: center;
  padding: 36px 28px;
}
.pause-icon {
  color: var(--sky-3);
  display: inline-flex; padding: 12px;
  background: rgba(43,111,179,0.1);
  border-radius: 50%;
  margin-bottom: 8px;
}
.pause-title { font-size: 26px; margin: 8px 0 6px; color: var(--sky-4); }
.pause-sub { color: var(--ink-soft); margin: 0 0 22px; }
.pause-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.typing-progress {
  height: 6px; background: rgba(43,111,179,0.12); border-radius: 999px;
  overflow: hidden; margin: 16px 0 20px;
}
.typing-progress-bar {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--sky-2), var(--sky-3));
  transition: width .1s linear;
}
.typing-actions { display: flex; justify-content: flex-end; gap: 10px; flex-wrap: wrap; }

/* -------------------------------------------------------- Score */
.score-card { max-width: 720px; width: 100%; text-align: center; }
.score-title { font-size: 28px; margin: 0 0 8px; color: var(--sky-4); }
.stars {
  display: flex; justify-content: center; gap: 6px; margin: 12px 0 24px;
  font-size: 32px; color: var(--warm-2);
}
.stars .star {
  opacity: 0;
  transform: scale(0.5);
  animation: starPop .5s var(--ease) forwards;
}
.stars .star.dim { color: rgba(28,42,58,0.15); }
@keyframes starPop {
  to { opacity: 1; transform: scale(1); }
}

.score-summary {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 14px; margin: 20px 0;
}
.score-summary-item {
  background: rgba(255,255,255,0.6); border-radius: var(--radius-sm);
  padding: 14px 12px; display: flex; flex-direction: column; align-items: center;
}
.score-summary-item.score-summary-primary {
  background: linear-gradient(135deg, rgba(43,111,179,0.15), rgba(111,184,255,0.18));
  border: 1px solid rgba(43,111,179,0.25);
}
.score-summary-item.score-summary-primary .score-value {
  font-size: 32px;
  background: linear-gradient(135deg, var(--sky-3), var(--sky-2));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.score-value { font: 600 26px 'JetBrains Mono', monospace; color: var(--sky-4); margin-top: 4px; }

.score-breakdown {
  width: 100%; border-collapse: collapse; margin: 8px 0 22px;
  font-size: 14px;
}
.score-breakdown th, .score-breakdown td {
  padding: 10px 12px; text-align: right;
  border-bottom: 1px solid var(--line);
}
.score-breakdown th:first-child, .score-breakdown td:first-child { text-align: left; }
.score-breakdown th {
  font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em;
  font-size: 11px; color: var(--ink-soft);
}
.score-breakdown td.num { font-family: 'JetBrains Mono', monospace; }

.save-row { display: flex; gap: 10px; justify-content: center; align-items: center; margin: 10px 0; flex-wrap: wrap; }
.save-msg { min-height: 20px; font-size: 14px; color: var(--sky-3); margin: 8px 0 16px; }
.save-msg.is-error { color: var(--coral); }
.save-msg.is-ok { color: #2d8a5e; }

.score-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

/* -------------------------------------------------------- Scoreboard */
.search-row { margin-bottom: 18px; }
.search-row .input { width: 100%; max-width: 380px; }
.table-wrap {
  background: var(--paper-glass);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  overflow: hidden;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.scores-table { width: 100%; border-collapse: collapse; }
.scores-table th, .scores-table td {
  padding: 14px 16px; text-align: left;
  border-bottom: 1px solid var(--line);
}
.scores-table th {
  cursor: pointer; font-size: 12px; text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--ink-soft); background: rgba(43,111,179,0.05);
  user-select: none;
}
.scores-table th:hover { color: var(--sky-4); }
.scores-table tbody tr {
  opacity: 0;
  animation: rowFade .3s var(--ease) forwards;
}
.scores-table td { font: 500 14px 'Inter', sans-serif; }
.scores-table td.num { font-family: 'JetBrains Mono', monospace; }
.scores-table .empty { text-align: center; padding: 40px; color: var(--ink-soft); }
@keyframes rowFade { to { opacity: 1; } }

/* -------------------------------------------------------- Map */
.map-container {
  background: var(--paper-glass);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  padding: 24px;
  min-height: 520px;
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(10px);
}
.map-container svg { width: 100%; height: auto; max-width: 900px; }
.map-container path.state {
  stroke: white; stroke-width: 1;
  transition: fill .2s, transform .2s;
  cursor: default;
}
.map-container path.state.generated { fill: var(--sky-3); }
.map-container path.state.empty { fill: #d5deea; }
.map-container path.state:hover { fill: var(--warm-2); }

.map-legend {
  display: flex; gap: 20px; margin-top: 18px;
  align-items: center; color: var(--ink-soft); font-size: 14px;
}
.legend-swatch {
  display: inline-block; width: 16px; height: 16px; border-radius: 4px;
  margin-right: 6px; vertical-align: middle;
}
.legend-generated { background: var(--sky-3); }
.legend-empty { background: #d5deea; }

#map-tooltip {
  position: absolute;
  background: var(--sky-4); color: white;
  padding: 6px 10px; border-radius: 6px;
  font-size: 13px; pointer-events: none;
  opacity: 0; transform: translate(-50%, -110%);
  transition: opacity .12s;
  white-space: nowrap;
}
#map-tooltip.is-visible { opacity: 1; }

/* -------------------------------------------------------- About */
.page h3 { color: var(--sky-4); margin: 28px 0 8px; }
.page p { line-height: 1.65; color: var(--ink); }
.citation {
  font-size: 14px; padding: 14px 16px; background: rgba(255,255,255,0.6);
  border-left: 3px solid var(--sky-3); border-radius: 6px;
  color: var(--ink-soft);
}
.muted { color: var(--ink-soft); font-size: 14px; }
code { background: rgba(43,111,179,0.1); padding: 2px 6px; border-radius: 4px; font-size: 13px; }

/* -------------------------------------------------------- Responsive */
@media (max-width: 900px) {
  .typing-layout {
    grid-template-columns: 1fr;
    padding: 20px 16px 32px;
    gap: 16px;
  }
  .kpi-panel { position: static; padding: 14px 16px; }
  .kpi-location-value { font-size: 22px; }
  .typing-main { min-height: unset; }
  .hud-stack { position: static; align-items: stretch; margin-bottom: 6px; }
  .typing-hud { justify-content: center; }
}
@media (max-width: 600px) {
  .app-header { padding: 12px 16px; }
  .brand-title { display: none; }
  .tab-btn { padding: 8px 12px; font-size: 13px; }
  .landing-title { font-size: 24px; }
  .typing-text { font-size: 18px; padding: 16px; min-height: 260px; }
  .typing-hud { gap: 8px; padding: 8px 10px; }
  .hud-item { min-width: 50px; }
  .hud-value { font-size: 16px; }
  .score-summary { grid-template-columns: repeat(2, 1fr); }
}

/* -------------------------------------------------------- Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .cloud, .scene-bg { animation: none !important; }
  .scene.is-active { animation: none; }
  .stars .star { animation: none; opacity: 1; transform: none; }
  .scores-table tbody tr { animation: none; opacity: 1; }
  .typing-text .ch.current::after { animation: none; opacity: 1; }
}