: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;
  --ocean: #101820;

  --p1: #4fd1c5;
  --p2: #c084fc;
  --neutral: #94a3b8;
}

* { 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;
}

.hidden { display: none !important; }

.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;
}

/* ---------- Start screen ---------- */

.setup-group { margin-bottom: 22px; }

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

.options-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.options-grid.three { grid-template-columns: repeat(3, 1fr); }

.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;
  font: inherit;
  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); }

.opt-title { font-weight: 700; font-size: 1.05rem; }
.opt-desc { font-size: 0.82rem; color: var(--text-dim); }

.name-row { display: flex; gap: 12px; }
.name-input {
  flex: 1;
  min-width: 0;
  padding: 12px 14px;
  font-size: 1rem;
  border-radius: 10px;
  border: 2px solid var(--panel-light);
  background: var(--panel);
  color: var(--text);
}
.name-input.p1 { border-left: 5px solid var(--p1); }
.name-input.p2 { border-left: 5px solid var(--p2); }
.name-input:focus { outline: none; border-color: var(--accent); }

.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; }
.primary-btn.secondary { background: var(--panel-light); color: var(--text); }
.primary-btn.secondary:hover:not(:disabled) { background: #2d3d55; }

.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: 20px auto 0;
  background: var(--panel);
  max-width: 560px;
  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 ---------- */

.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
  gap: 10px;
}
.duel-hud { display: flex; align-items: center; gap: 12px; }
.duel-vs {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-weight: 700;
  text-transform: uppercase;
}
.player-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 6px 14px;
  border-radius: 8px;
  background: var(--panel);
  border: 2px solid transparent;
  min-width: 96px;
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
}
.chip-name {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-weight: 600;
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.chip-wins { font-size: 1.4rem; font-weight: 700; line-height: 1; }
.player-chip.p1 .chip-wins { color: var(--p1); }
.player-chip.p2 .chip-wins { color: var(--p2); }
.player-chip.p1.active { border-color: var(--p1); background: var(--panel-light); transform: translateY(-1px); }
.player-chip.p2.active { border-color: var(--p2); background: var(--panel-light); transform: translateY(-1px); }
.hud-right { display: flex; gap: 12px; align-items: center; }
.chain-count { font-weight: 700; color: var(--text-dim); }

/* ---------- Timer ---------- */

.timer-track {
  position: relative;
  height: 10px;
  background: var(--panel);
  border-radius: 999px;
  margin: 22px 0 12px;
}
.timer-bar {
  height: 100%;
  width: 100%;
  border-radius: 999px;
  background: var(--p1);
}
.timer-bar.p2 { background: var(--p2); }
.timer-bar.low { background: var(--incorrect); }
.timer-text {
  position: absolute;
  right: 0;
  top: -21px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}
.timer-text.low { color: var(--incorrect); }

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

.map-wrap {
  position: relative;
  background: var(--ocean);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #233044;
}
#map-svg {
  display: block;
  width: 100%;
  height: 46vh;
  max-height: 460px;
  cursor: grab;
}
#map-svg:active { cursor: grabbing; }

.sphere { fill: var(--ocean); }
.country-path {
  fill: var(--land);
  stroke: var(--land-stroke);
  stroke-width: 0.6;
  vector-effect: non-scaling-stroke;
  transition: fill 0.3s;
}
.map-blank .country-path { fill: transparent; stroke: none; }
.country-path.used-start { fill: var(--neutral); stroke: var(--bg); }
.country-path.used-p1 { fill: var(--p1); stroke: var(--bg); }
.country-path.used-p2 { fill: var(--p2); stroke: var(--bg); }
.country-path.current { stroke: var(--highlight); stroke-width: 2.5; }
.country-path.reveal { fill: var(--highlight); fill-opacity: 0.5; stroke: #fff; stroke-width: 1; stroke-dasharray: 3 2; }
.country-path.wrong { fill: var(--incorrect); stroke: #fff; stroke-width: 1; }
.lake-path { fill: var(--ocean); stroke: none; pointer-events: none; }

.chain-line {
  fill: none;
  stroke: #ffffff;
  stroke-opacity: 0.8;
  stroke-width: 2;
  stroke-dasharray: 5 4;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
}
.chain-dot { stroke: var(--bg); stroke-width: 1.5; vector-effect: non-scaling-stroke; pointer-events: none; }
.chain-dot.start { fill: var(--neutral); }
.chain-dot.p1 { fill: var(--p1); }
.chain-dot.p2 { fill: var(--p2); }

.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, 0.75);
  stroke-width: 3px;
  stroke-linejoin: round;
  pointer-events: none;
}
.country-label.reveal { fill: var(--highlight); }
.country-label.wrong { fill: #fecaca; }

.feedback-banner {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 10px 22px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 1.05rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  z-index: 10;
  white-space: nowrap;
  max-width: calc(100% - 24px);
  overflow: hidden;
  text-overflow: ellipsis;
}
.feedback-banner.correct { background: var(--correct); color: #06270f; }
.feedback-banner.incorrect { background: var(--incorrect); color: #2a0606; }
.feedback-banner.info { background: var(--panel-light); color: var(--text); }

/* ---------- Answer area ---------- */

.answer-area { margin-top: 16px; }
#question-text { text-align: center; font-size: 1.2rem; margin: 0 0 10px; }
#question-text .who.p1 { color: var(--p1); }
#question-text .who.p2 { color: var(--p2); }
#question-text .where { color: var(--highlight); }

.chain-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 2px;
  justify-content: center;
  align-items: center;
  margin-bottom: 14px;
  min-height: 28px;
  font-size: 0.85rem;
}
.chain-tag {
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid;
  animation: tag-pop 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.chain-tag.start { color: var(--neutral); border-color: rgba(148, 163, 184, 0.4); background: rgba(148, 163, 184, 0.12); }
.chain-tag.p1 { color: var(--p1); border-color: rgba(79, 209, 197, 0.4); background: rgba(79, 209, 197, 0.12); }
.chain-tag.p2 { color: var(--p2); border-color: rgba(192, 132, 252, 0.4); background: rgba(192, 132, 252, 0.12); }
.chain-tag.wrong { color: var(--incorrect); border-color: rgba(248, 113, 113, 0.5); background: rgba(248, 113, 113, 0.12); text-decoration: line-through; }
.chain-arrow { color: var(--text-dim); opacity: 0.6; padding: 0 2px; }
@keyframes tag-pop {
  from { opacity: 0; transform: scale(0.85); }
  to   { opacity: 1; transform: scale(1); }
}

.answer-form { display: flex; gap: 10px; }
.input-wrap { position: relative; flex: 1; min-width: 0; }
#answer-input {
  width: 100%;
  padding: 14px 16px;
  font-size: 1.05rem;
  border-radius: 10px;
  border: 2px solid var(--panel-light);
  background: var(--panel);
  color: var(--text);
}
#answer-input:focus { outline: none; box-shadow: 0 0 0 2px var(--accent); }
#answer-input:disabled { opacity: 0.5; }
#answer-form #submit-btn {
  width: auto;
  margin-top: 0;
  padding: 14px 24px;
  flex-shrink: 0;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.suggestions {
  position: absolute;
  left: 0; right: 0; bottom: calc(100% + 6px);
  margin: 0; padding: 4px;
  list-style: none;
  background: var(--panel);
  border: 1px solid var(--panel-light);
  border-radius: 10px;
  box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.45);
  z-index: 20;
}
.suggestions li { padding: 8px 12px; border-radius: 7px; cursor: pointer; }
.suggestions li:hover, .suggestions li.active { background: var(--panel-light); color: var(--accent); }

.bottom-btns { display: flex; gap: 10px; margin-top: 10px; }
.give-up-btn {
  flex: 1;
  padding: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
  border: 1px solid var(--panel-light);
  color: var(--text-dim);
}
.give-up-btn:hover:not(:disabled) { border-color: var(--incorrect); color: var(--incorrect); }
.give-up-btn:disabled { opacity: 0.3; cursor: not-allowed; }

.end-panel {
  background: var(--panel);
  border: 1px solid var(--panel-light);
  border-radius: 12px;
  padding: 18px 20px;
  text-align: center;
  animation: tag-pop 0.3s ease;
}
.end-panel h2 { margin: 0 0 6px; font-size: 1.5rem; }
.end-panel h2.p1 { color: var(--p1); }
.end-panel h2.p2 { color: var(--p2); }
.end-reason { margin: 0 0 6px; }
.end-remaining { margin: 0 0 14px; color: var(--text-dim); font-size: 0.9rem; line-height: 1.5; }
.end-remaining strong { color: var(--highlight); }
.end-btns { display: flex; gap: 12px; }
.end-btns .primary-btn { margin-top: 0; }

.shake { animation: shake 0.35s ease; }
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

/* ---------- Online lobby / join ---------- */

.link-box { display: flex; gap: 10px; max-width: 640px; margin: 0 auto; }
#invite-link {
  flex: 1;
  min-width: 0;
  padding: 14px 16px;
  font-size: 0.95rem;
  border-radius: 10px;
  border: 2px solid var(--panel-light);
  background: var(--panel);
  color: var(--text);
}
#invite-link:focus { outline: none; border-color: var(--accent); }
.link-box .primary-btn { width: auto; margin-top: 0; padding: 14px 24px; flex-shrink: 0; }
#share-link-btn { max-width: 640px; margin: 10px auto 0; }
.lobby-code-row { text-align: center; color: var(--text-dim); margin: 18px 0 0; font-size: 0.9rem; }
.lobby-code {
  display: inline-block;
  margin-left: 6px;
  padding: 2px 10px;
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  font-weight: 700;
  letter-spacing: 3px;
  font-family: Consolas, monospace;
}
.lobby-code:empty { display: none; }
.lobby-wait { display: flex; align-items: center; justify-content: center; gap: 12px; margin-top: 22px; }
.lobby-wait .lobby-status { margin: 0; }
.lobby-status { text-align: center; color: var(--text); margin: 14px 0 0; min-height: 1.2em; }
.lobby-status.error { color: var(--incorrect); }
.lobby-note { text-align: center; color: var(--text-dim); font-size: 0.85rem; margin-top: 18px; }
.spinner.small { width: 22px; height: 22px; border-width: 3px; flex-shrink: 0; }
#join-screen .name-input { width: 100%; }

/* ---------- 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 !important; }
.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) {
  #app { padding: 16px; }
  .options-grid, .options-grid.three { grid-template-columns: 1fr; }
  h1 { font-size: 1.6rem; }
  .name-row { flex-direction: column; }
  .link-box { flex-direction: column; }
  .link-box .primary-btn { width: 100%; }
  .player-chip { min-width: 0; padding: 5px 10px; }
  .chip-name { max-width: 90px; }
  #answer-form #submit-btn { padding: 14px; }
  #map-svg { height: 38vh; }
}