:root {
  --bg: #0f1620;
  --panel: #1a2533;
  --panel-light: #233044;
  --accent: #4fd1c5;
  --accent-dark: #2ca39a;
  --text: #eef3f8;
  --text-dim: #9fb0c2;
  --correct: #4ade80;
  --incorrect: #f87171;
  --land: #3a4a5e;
  --land-stroke: #1a2533;
  --ocean: #101820;

  --tier-1: #4ade80;
  --tier-2: #a3e635;
  --tier-3: #facc15;
  --tier-4: #fb923c;
  --tier-5: #f87171;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  height: 100%;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
}

#app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px;
  min-height: 100vh;
}

.screen { display: none; }
.screen.active { display: block; }

h1 {
  text-align: center;
  font-size: 2.2rem;
  margin-bottom: 4px;
  letter-spacing: 1px;
}

.subtitle {
  text-align: center;
  color: var(--text-dim);
  margin-top: 10px;
  margin-bottom: 28px;
  line-height: 1.6;
}

.start-info {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.info-card {
  background: var(--panel);
  border: 1px solid var(--panel-light);
  border-radius: 12px;
  padding: 18px 26px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  min-width: 120px;
}

.info-num { font-size: 1.8rem; font-weight: 800; color: var(--accent); }
.info-label { font-size: 0.8rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 1px; }

.rules {
  max-width: 640px;
  margin: 0 auto 28px;
  text-align: center;
  color: var(--text-dim);
  line-height: 1.6;
}

.primary-btn {
  display: block;
  width: 100%;
  max-width: 340px;
  margin: 0 auto;
  padding: 14px;
  font-size: 1.1rem;
  font-weight: 700;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: #06231f;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
}
.primary-btn:hover:not(:disabled) { background: var(--accent-dark); }
.primary-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.primary-btn.hidden { display: none; }

.back-link { text-align: center; margin-top: 16px; font-size: 0.9rem; }
.back-link a { color: var(--text-dim); text-decoration: none; }
.back-link a:hover { color: var(--accent); }

.how-to {
  border: 1px solid var(--panel-light);
  border-radius: 8px;
  margin-top: 20px;
  background: var(--panel);
  max-width: 520px;
  width: 100%;
  text-align: left;
}

.how-to-summary {
  display: block;
  padding: 10px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.how-to-summary::-webkit-details-marker { display: none; }
.how-to-summary::before {
  content: "\25B8";
  display: inline-block;
  margin-right: 8px;
  transition: transform 0.2s;
}
details.how-to[open] > .how-to-summary::before { transform: rotate(90deg); }
.how-to-summary:hover { color: var(--text); }

.how-to-body { padding: 0 16px 12px; }
.how-to-body p {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.55;
  margin: 0 0 10px;
}
.how-to-body p:last-child { margin-bottom: 0; }
.how-to-body strong { color: var(--text); }

.text-btn {
  background: none; border: none;
  color: var(--text-dim); cursor: pointer;
  font-size: 0.95rem; text-decoration: underline;
}
.text-btn:hover { color: var(--text); }

/* ---- Game header ---- */
.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.hud {
  display: flex;
  gap: 14px;
  align-items: center;
  font-weight: 600;
  color: var(--text-dim);
  flex-wrap: wrap;
}

#score-counter { color: var(--accent); }

.hud-toggle {
  background: var(--panel);
  border: 1px solid var(--panel-light);
  border-radius: 6px;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 4px 10px;
  transition: border-color 0.15s, color 0.15s;
}
.hud-toggle:hover { border-color: var(--accent); color: var(--text); }
.hud-toggle.active { border-color: var(--accent); color: var(--accent); }

.tier-badge {
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  background: color-mix(in srgb, var(--tier-1) 20%, transparent);
  color: var(--tier-1);
  border: 1px solid var(--tier-1);
}
.tier-badge.tier-2 { background: color-mix(in srgb, var(--tier-2) 20%, transparent); color: var(--tier-2); border-color: var(--tier-2); }
.tier-badge.tier-3 { background: color-mix(in srgb, var(--tier-3) 20%, transparent); color: var(--tier-3); border-color: var(--tier-3); }
.tier-badge.tier-4 { background: color-mix(in srgb, var(--tier-4) 20%, transparent); color: var(--tier-4); border-color: var(--tier-4); }
.tier-badge.tier-5 { background: color-mix(in srgb, var(--tier-5) 20%, transparent); color: var(--tier-5); border-color: var(--tier-5); }

.progress-track {
  height: 6px;
  border-radius: 3px;
  background: var(--panel);
  overflow: hidden;
  margin-bottom: 16px;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--tier-1), var(--tier-5));
  transition: width 0.3s ease;
}

/* ---- Prompt panel ---- */
.prompt-panel {
  background: var(--panel);
  border: 1px solid var(--panel-light);
  border-radius: 12px;
  padding: 16px 20px;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.flag-img {
  width: 72px;
  height: 48px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--panel-light);
  flex-shrink: 0;
}
.flag-img.hidden { display: none; }

.question-text {
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.4;
  margin: 0;
}

/* ---- Map panel ---- */
.map-panel { display: flex; flex-direction: column; }

.map-wrap {
  position: relative;
  background: var(--ocean);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #233044;
  cursor: crosshair;
}

#map-svg {
  display: block;
  width: 100%;
  height: auto;
  min-height: 420px;
}

#map-svg.pannable { cursor: grab; }
#map-svg.pannable:active { cursor: grabbing; }

.click-hint {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(15, 22, 32, 0.85);
  color: var(--text-dim);
  font-size: 0.85rem;
  padding: 6px 14px;
  border-radius: 20px;
  pointer-events: none;
  transition: opacity 0.3s;
}
.click-hint.hidden { opacity: 0; }

.feedback-banner {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 10px 22px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 1.1rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
  white-space: nowrap;
}
.feedback-banner.great { background: #4ade80; color: #06270f; }
.feedback-banner.good  { background: #facc15; color: #1a1000; }
.feedback-banner.okay  { background: #fb923c; color: #200e00; }
.feedback-banner.miss  { background: var(--incorrect); color: #2a0606; }
.feedback-banner.hidden { display: none; }

/* ---- Action bar ---- */
.action-bar {
  display: flex;
  gap: 12px;
  margin-top: 14px;
}
.action-bar .primary-btn { margin: 0; max-width: none; flex: 1; }

/* ---- Result detail ---- */
.result-detail {
  display: flex;
  justify-content: center;
  margin-top: 14px;
  padding: 14px;
  background: var(--panel);
  border-radius: 10px;
  font-size: 1.1rem;
  font-weight: 600;
}
.result-detail.hidden { display: none; }

#points-display { color: var(--accent); font-size: 1.3rem; }

/* ---- Results screen ---- */
.final-score {
  text-align: center;
  font-size: 2rem;
  color: var(--accent);
  font-weight: 800;
  margin-bottom: 4px;
}

.final-rank {
  text-align: center;
  color: var(--text-dim);
  font-size: 1.1rem;
  margin-top: 0;
  margin-bottom: 20px;
}

.results-summary {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.summary-card {
  background: var(--panel);
  border-radius: 10px;
  padding: 14px 22px;
  text-align: center;
}
.summary-card .num { display: block; font-size: 1.5rem; font-weight: 800; color: var(--accent); }
.summary-card .lbl { display: block; font-size: 0.8rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 1px; margin-top: 2px; }

/* ---- Map geometry ---- */
.country-path {
  fill: var(--land);
  stroke: var(--land-stroke);
  stroke-width: 0.2;
}

.lake-path {
  fill: var(--ocean);
  stroke: #1a2533;
  stroke-width: 0.2;
  pointer-events: none;
}

.pin-guess, .pin-actual { pointer-events: none; }

.target-country, .target-area, .target-lake {
  fill: var(--accent);
  stroke: #fff;
  stroke-width: 0.8;
  animation: target-glow 1.4s ease-in-out infinite alternate;
  pointer-events: none;
}
.target-country { fill: var(--accent) !important; stroke: #fff !important; stroke-width: 0.8 !important; }
.target-lake { fill: var(--accent) !important; stroke: #fff !important; stroke-width: 0.6 !important; }

@keyframes target-glow {
  from { fill-opacity: 0.55; }
  to   { fill-opacity: 0.95; }
}

.target-pulse {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  animation: target-pulse 1.4s ease-out infinite;
  transform-box: fill-box;
  transform-origin: center;
}

@keyframes target-pulse {
  0%   { r: 4; stroke-opacity: 1; }
  100% { r: 22; stroke-opacity: 0; }
}

.answer-label { color: var(--text); font-weight: 700; }

/* ---- Loading overlay ---- */
#loading-overlay {
  position: fixed; inset: 0;
  background: var(--bg);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 16px; color: var(--text-dim); z-index: 100;
}
#loading-overlay.hidden { display: none; }

.spinner {
  width: 40px; height: 40px;
  border: 4px solid var(--panel-light);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 600px) {
  h1 { font-size: 1.6rem; }
  .prompt-panel { flex-direction: column; align-items: flex-start; }
  .action-bar { flex-direction: column; }
}