: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;
  --highlight: #f6ad55;
  --neighbor-found: #4ade80;
  --neighbor-missed: #f87171;
  --ocean: #101820;

  --diff-1: #4ade80;
  --diff-2: #facc15;
  --diff-3: #fb923c;
  --diff-4: #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: 1000px;
  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: 0;
  margin-bottom: 28px;
}

.setup-group {
  margin-bottom: 24px;
}

.setup-group h2 {
  font-size: 1.05rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
  font-weight: 600;
}

.setup-group h2 .hint {
  text-transform: none;
  letter-spacing: normal;
  font-weight: 400;
  font-size: 0.85rem;
  opacity: 0.8;
}

.options-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.option-btn {
  background: var(--panel);
  border: 2px solid transparent;
  border-radius: 10px;
  padding: 14px 16px;
  text-align: left;
  cursor: pointer;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: border-color 0.15s, background 0.15s, transform 0.1s;
}

.option-btn:hover {
  background: var(--panel-light);
  transform: translateY(-1px);
}

.option-btn.selected {
  border-color: var(--accent);
  background: var(--panel-light);
}

#difficulty-options .option-btn[data-difficulty="1"] { border-color: color-mix(in srgb, var(--diff-1) 35%, transparent); }
#difficulty-options .option-btn[data-difficulty="2"] { border-color: color-mix(in srgb, var(--diff-2) 35%, transparent); }
#difficulty-options .option-btn[data-difficulty="3"] { border-color: color-mix(in srgb, var(--diff-3) 35%, transparent); }
#difficulty-options .option-btn[data-difficulty="4"] { border-color: color-mix(in srgb, var(--diff-4) 35%, transparent); }

#difficulty-options .option-btn[data-difficulty="1"].selected { border-color: var(--diff-1); box-shadow: 0 0 0 1px var(--diff-1) inset; }
#difficulty-options .option-btn[data-difficulty="2"].selected { border-color: var(--diff-2); box-shadow: 0 0 0 1px var(--diff-2) inset; }
#difficulty-options .option-btn[data-difficulty="3"].selected { border-color: var(--diff-3); box-shadow: 0 0 0 1px var(--diff-3) inset; }
#difficulty-options .option-btn[data-difficulty="4"].selected { border-color: var(--diff-4); box-shadow: 0 0 0 1px var(--diff-4) inset; }

.opt-title {
  font-weight: 700;
  font-size: 1.05rem;
}

.opt-desc {
  font-size: 0.82rem;
  color: var(--text-dim);
}

.primary-btn {
  display: block;
  width: 100%;
  margin-top: 8px;
  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;
}

.back-link { text-align: center; margin-top: 16px; font-size: 0.9rem; }
.back-link a { color: var(--muted); 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); }

.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);
}

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

/* ---------- Game screen ---------- */

.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.hud {
  display: flex;
  gap: 18px;
  font-weight: 600;
  color: var(--text-dim);
}

.hud-right {
  display: flex;
  gap: 8px;
  align-items: center;
}

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

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

.map-wrap.hidden { display: none; }

#map-svg {
  display: block;
  width: 100%;
  height: 50vh;
  max-height: 480px;
}

.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);
  z-index: 10;
  white-space: nowrap;
}

.feedback-banner.correct {
  background: var(--correct);
  color: #06270f;
}

.feedback-banner.incorrect {
  background: var(--incorrect);
  color: #2a0606;
}

.feedback-banner.hidden { display: none; }

.answer-area {
  margin-top: 18px;
}

#question-text {
  text-align: center;
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.neighbor-progress {
  text-align: center;
  color: var(--text-dim);
  margin-bottom: 12px;
  font-size: 0.95rem;
}

.neighbor-progress #found-counter {
  color: var(--correct);
  font-weight: 700;
}

.found-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 14px;
  min-height: 32px;
}

.found-tag {
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  animation: tag-pop 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.found-tag.correct {
  background: rgba(74, 222, 128, 0.18);
  color: var(--correct);
  border: 1px solid rgba(74, 222, 128, 0.4);
}

.found-tag.missed {
  background: rgba(248, 113, 113, 0.18);
  color: var(--incorrect);
  border: 1px solid rgba(248, 113, 113, 0.4);
}

@keyframes tag-pop {
  from { opacity: 0; transform: scale(0.85); }
  to   { opacity: 1; transform: scale(1); }
}

.answer-form {
  display: flex;
  gap: 10px;
}

.answer-form.hidden { display: none; }

#answer-input {
  flex: 1;
  padding: 14px 16px;
  font-size: 1.05rem;
  border-radius: 10px;
  border: 2px solid var(--panel-light);
  background: var(--panel);
  color: var(--text);
  transition: border-color 0.2s, background 0.2s;
}

#answer-input:focus {
  outline: none;
  box-shadow: 0 0 0 2px var(--accent);
}

#answer-input.correct {
  background: rgba(74, 222, 128, 0.16);
}

#answer-input.incorrect {
  background: rgba(248, 113, 113, 0.16);
}

#answer-form #submit-btn {
  width: auto;
  margin-top: 0;
  padding: 14px 24px;
  flex-shrink: 0;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.bottom-btns {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.hint-btn, .give-up-btn {
  flex: 1;
  padding: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.hint-btn {
  border: 1px solid var(--panel-light);
  color: var(--accent);
}

.hint-btn:hover:not(:disabled) {
  border-color: var(--accent);
}

.give-up-btn {
  border: 1px solid var(--panel-light);
  color: var(--text-dim);
}

.give-up-btn:hover:not(:disabled) {
  border-color: var(--incorrect);
  color: var(--incorrect);
}

.hint-btn:disabled, .give-up-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.found-tag.hint {
  background: rgba(79, 209, 197, 0.12);
  color: var(--accent);
  border: 1px solid rgba(79, 209, 197, 0.35);
  font-style: italic;
  letter-spacing: 1px;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.found-tag.hint.dissolve {
  opacity: 0;
  transform: scale(0.8);
}

.final-score {
  text-align: center;
  font-size: 1.4rem;
  color: var(--accent);
  font-weight: 700;
}

/* ---------- Map geometry ---------- */

.country-path {
  fill: transparent;
  stroke: none;
  stroke-width: 0;
  transition: fill 0.3s;
}

.show-outlines .country-path {
  stroke: var(--land-stroke);
  stroke-width: 0.5;
}

.country-path.target {
  fill: var(--highlight);
  stroke: #ffffff;
  stroke-width: 1;
}

.country-path.neighbor-found {
  fill: var(--neighbor-found);
  stroke: #ffffff;
  stroke-width: 1;
}

.country-path.neighbor-missed {
  fill: var(--neighbor-missed);
  stroke: #ffffff;
  stroke-width: 1;
}

.country-path.neighbor-hint {
  fill: transparent;
  stroke: var(--accent);
  stroke-width: 1.5;
  stroke-dasharray: 4 3;
}

.lake-path {
  fill: var(--ocean);
  stroke: none;
  pointer-events: none;
}

.country-label {
  fill: #ffffff;
  font-size: 11px;
  font-weight: 700;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  paint-order: stroke;
  stroke: rgba(0,0,0,0.7);
  stroke-width: 3px;
  stroke-linejoin: round;
  pointer-events: none;
}

/* ---------- 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); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%       { transform: translateX(-6px); }
  40%       { transform: translateX(6px); }
  60%       { transform: translateX(-4px); }
  80%       { transform: translateX(4px); }
}

.shake { animation: shake 0.35s ease; }

/* ---------- Duels HUD ---------- */

/* ================================================================
   Trade Partners
   ================================================================ */

:root {
  --found: #4ade80;
  --missed: #f87171;
  --arc: #4fd1c5;
}

.hidden { display: none !important; }

#map-svg { height: 52vh; max-height: 500px; }

.sphere { fill: var(--ocean); stroke: #2a3a4e; stroke-width: 1; vector-effect: non-scaling-stroke; }
.graticule { fill: none; stroke: #1b2735; stroke-width: 0.5; vector-effect: non-scaling-stroke; }

.country-path {
  fill: var(--land);
  stroke: var(--land-stroke);
  stroke-width: 0.5;
  vector-effect: non-scaling-stroke;
}
.country-path.target { fill: var(--highlight); stroke: #fff; stroke-width: 1; }
.country-path.partner-found { fill: var(--found); stroke: #fff; stroke-width: 1; }
.country-path.partner-missed { fill: var(--missed); stroke: #fff; stroke-width: 1; }
.country-path.wrong-guess { fill: #55303a; }

.trade-arc {
  fill: none;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
  opacity: 0.9;
}
.trade-arc.found { stroke: var(--found); }
.trade-arc.missed { stroke: var(--missed); stroke-dasharray: 6 4; }

.partner-dot { stroke: #0f1620; stroke-width: 1.5; vector-effect: non-scaling-stroke; pointer-events: none; }
.partner-dot.found { fill: var(--found); }
.partner-dot.missed { fill: var(--missed); }

.partner-label {
  fill: #fff;
  font-weight: 700;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  paint-order: stroke;
  stroke: rgba(0, 0, 0, 0.75);
  stroke-linejoin: round;
  pointer-events: none;
}

.zoom-btns {
  position: absolute;
  right: 10px;
  bottom: 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.zoom-btns button {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  border: 1px solid #2a3a4e;
  background: var(--panel);
  color: var(--text);
  font-size: 1.1rem;
  cursor: pointer;
}
.zoom-btns button:hover { border-color: var(--accent); }

#question-text { text-align: center; margin: 0 0 6px; font-size: 1.35rem; }
.target-name { color: var(--highlight); }

.round-status {
  display: flex;
  justify-content: center;
  gap: 24px;
  color: var(--text-dim);
  font-size: 0.95rem;
  margin-bottom: 12px;
}
#found-counter { color: var(--accent); font-weight: 700; }
.misses { display: inline-flex; align-items: center; gap: 5px; }
.miss-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 2px solid var(--missed);
  display: inline-block;
}
.miss-dot.used { background: var(--missed); }

.rank-list {
  list-style: none;
  padding: 0;
  margin: 0 auto 14px;
  max-width: 560px;
  display: grid;
  gap: 6px;
}
.rank-slot {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 14px;
  border-radius: 8px;
  background: var(--panel);
  border: 1px solid var(--panel-light);
  transition: background 0.3s, border-color 0.3s;
}
.rank-num { font-weight: 800; color: var(--text-dim); width: 2.2em; }
.rank-name { font-weight: 600; color: var(--text-dim); letter-spacing: 1px; }
.rank-slot.found { border-color: var(--found); background: color-mix(in srgb, var(--found) 14%, var(--panel)); }
.rank-slot.found .rank-name, .rank-slot.found .rank-num { color: var(--found); letter-spacing: normal; }
.rank-slot.missed { border-color: var(--missed); background: color-mix(in srgb, var(--missed) 12%, var(--panel)); }
.rank-slot.missed .rank-name, .rank-slot.missed .rank-num { color: var(--missed); letter-spacing: normal; }

.answer-form { display: flex; gap: 8px; max-width: 560px; margin: 0 auto; }
#answer-input { flex: 1; min-width: 0; }

.wrong-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  margin: 10px auto 0;
  max-width: 560px;
  min-height: 4px;
}
.wrong-list .found-tag { text-decoration: line-through; opacity: 0.85; }

.bottom-btns { justify-content: center; }

.results-list { max-width: 760px; margin: 0 auto 24px; display: grid; gap: 6px; }
.result-row {
  display: grid;
  grid-template-columns: 170px 1fr 48px;
  gap: 12px;
  align-items: center;
  padding: 8px 14px;
  background: var(--panel);
  border-radius: 8px;
  font-size: 0.9rem;
}
.result-country { font-weight: 700; }
.result-partners { display: flex; flex-wrap: wrap; gap: 4px 12px; }
.result-partners .hit { color: var(--found); }
.result-partners .miss { color: var(--missed); }
.result-points { text-align: right; font-weight: 700; color: var(--accent); }

@media (max-width: 600px) {
  #app { padding: 16px; }
  #map-svg { height: 38vh; }
  .result-row { grid-template-columns: 1fr 40px; }
  .result-partners { grid-column: 1 / -1; grid-row: 2; }
}