: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: #16202c;
  --highlight: #f6ad55;
  --ocean: #0b1219;
  --missed: #b45f5f;

  --diff-1: #4ade80;
  --diff-2: #facc15;
  --diff-3: #fb923c;
  --diff-4: #f87171;
}

* { box-sizing: border-box; }

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

#app {
  max-width: 1040px;
  margin: 0 auto;
  padding: 20px;
  min-height: 100vh;
}

.screen { display: none; }
.screen.active { display: block; }
.hidden { display: none !important; }

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: 20px;
}

.how-to {
  background: var(--panel);
  border: 1px solid var(--panel-light);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 26px;
}

.how-to p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.92rem;
  line-height: 1.5;
}

.how-to em { color: var(--highlight); font-style: normal; font-weight: 600; }

/* ── Setup ───────────────────────────────────────────── */

.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;
}

.options-grid.three-col { grid-template-columns: repeat(3, 1fr); }
.options-grid.four-col  { grid-template-columns: repeat(4, 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;
  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); }

.toggle-row { display: flex; flex-wrap: wrap; gap: 18px; }

.switch {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-dim);
  cursor: pointer;
  user-select: none;
}

.switch input { accent-color: var(--accent); width: 16px; height: 16px; cursor: pointer; }
.switch:hover { color: var(--text); }

.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.compact {
  width: auto;
  margin-top: 0;
  padding: 11px 22px;
  font-size: 0.95rem;
}

.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); }

.ghost-btn {
  background: var(--panel);
  border: 1px solid var(--panel-light);
  border-radius: 8px;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 10px 14px;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.ghost-btn:hover:not(:disabled) { border-color: var(--accent); color: var(--text); background: var(--panel-light); }
.ghost-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.ghost-btn.danger:hover:not(:disabled) { border-color: var(--incorrect); color: #ffd9d9; }
.ghost-btn .cost { color: var(--incorrect); font-weight: 700; margin-left: 4px; font-size: 0.8rem; }

.ghost-btn .note {
  display: block;
  margin-top: 2px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  text-transform: uppercase;
  color: var(--highlight);
  opacity: 0.85;
}

/* ── Game screen ─────────────────────────────────────── */

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

.hud {
  display: flex;
  gap: 18px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-dim);
  flex-wrap: wrap;
}

.hud span { white-space: nowrap; }
#score-counter { color: var(--accent); }

.anchor-bar {
  display: flex;
  align-items: baseline;
  gap: 10px;
  background: var(--panel);
  border: 1px solid var(--panel-light);
  border-left: 3px solid var(--highlight);
  border-radius: 8px;
  padding: 8px 14px;
  margin-bottom: 10px;
}

.anchor-label {
  font-size: 0.72rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-dim);
  font-weight: 700;
}

.anchor-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--highlight);
}

.anchor-name.unknown { color: var(--text-dim); font-style: italic; font-weight: 600; }

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

#map-svg { display: block; width: 100%; height: auto; }
#ocean { fill: var(--ocean); }

.country {
  fill: var(--land);
  stroke: var(--land-stroke);
  stroke-width: 0.7;
  stroke-linejoin: round;
}

.country.anchor { fill: var(--highlight); stroke: #7c4a13; stroke-width: 1; }

.country.found {
  fill: var(--land);
  animation: pop-in 0.55s ease-out;
}

.country.bonus { fill: #4a6b52; }
.country.missed { fill: #3b2529; stroke: var(--missed); stroke-width: 1.2; }
.country.shape-hint { fill: none; stroke: var(--accent); stroke-width: 1.6; stroke-dasharray: 5 4; }

@keyframes pop-in {
  0%   { fill: var(--correct); opacity: 0; }
  25%  { fill: var(--correct); opacity: 1; }
  100% { fill: var(--land); opacity: 1; }
}

.graticule {
  fill: none;
  stroke: #23384a;
  stroke-width: 0.6;
  stroke-dasharray: 3 5;
}

.map-label {
  font-size: 13px;
  font-weight: 700;
  fill: var(--text);
  paint-order: stroke;
  stroke: #0b1219;
  stroke-width: 3.5px;
  stroke-linejoin: round;
  text-anchor: middle;
  pointer-events: none;
}

.map-label.missed-label { fill: #f3a9a9; }
.map-label.bonus-label { fill: #b9e6c4; font-size: 11px; }
.map-label.anchor-label-text { fill: var(--highlight); }

#compass-layer .compass-ring { fill: rgba(11,18,25,0.72); stroke: var(--panel-light); stroke-width: 1.5; }
#compass-layer .compass-needle { fill: var(--incorrect); }
#compass-layer .compass-tail { fill: var(--text-dim); }
#compass-layer .compass-n { fill: var(--text); font-size: 12px; font-weight: 700; text-anchor: middle; }

.feedback-banner {
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  padding: 9px 20px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  background: var(--panel);
  border: 1px solid var(--panel-light);
  color: var(--text);
  pointer-events: none;
  animation: fade-slide 0.25s ease-out;
}

.feedback-banner.good { background: #14361f; border-color: var(--correct); color: #b7f5c9; }
.feedback-banner.bad { background: #3a1c1c; border-color: var(--incorrect); color: #ffd0d0; }
.feedback-banner.neutral { background: #1d2b3a; border-color: var(--accent-dark); color: #cbe9e6; }

@keyframes fade-slide {
  from { opacity: 0; transform: translate(-50%, -10px); }
  to   { opacity: 1; transform: translate(-50%, 0); }
}

/* ── Slots ───────────────────────────────────────────── */

.slots {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 12px 0;
  min-height: 34px;
}

.slot {
  padding: 6px 13px;
  border-radius: 8px;
  font-size: 0.87rem;
  font-weight: 600;
  background: var(--panel);
  border: 1px solid var(--panel-light);
  color: var(--text-dim);
  letter-spacing: 0.5px;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.slot.found { background: #16341f; border-color: var(--correct); color: #c6f6d5; letter-spacing: normal; }
.slot.missed { background: #331a1a; border-color: var(--missed); color: #f5c2c2; letter-spacing: normal; }
.slot.bonus { background: #1c2f26; border-color: #4a6b52; color: #b9e6c4; letter-spacing: normal; font-size: 0.8rem; }
.slot.anchor-slot { border-color: var(--highlight); color: var(--highlight); }

.answer-area { margin-top: 6px; }

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

.input-wrap {
  position: relative;
  flex: 1;
  display: flex;
}

/* Opens upward — the answer box already sits near the bottom of the page. */
.suggestions {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 0;
  right: 0;
  z-index: 30;
  margin: 0;
  padding: 4px;
  list-style: none;
  max-height: 264px;
  overflow-y: auto;
  background: var(--panel);
  border: 1px solid var(--panel-light);
  border-radius: 10px;
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.5);
}

.suggestion {
  padding: 9px 12px;
  border-radius: 6px;
  font-size: 0.95rem;
  color: var(--text-dim);
  cursor: pointer;
}

.suggestion:hover,
.suggestion.active {
  background: var(--panel-light);
  color: var(--text);
}

.suggestion mark {
  background: none;
  color: var(--accent);
  font-weight: 700;
}

#answer-input {
  flex: 1;
  width: 100%;
  padding: 12px 16px;
  font-size: 1rem;
  border-radius: 10px;
  border: 1px solid var(--panel-light);
  background: var(--panel);
  color: var(--text);
  outline: none;
}

#answer-input:focus { border-color: var(--accent); }
#answer-input::placeholder { color: #6b7f92; }

.action-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

/* ── Results ─────────────────────────────────────────── */

.final-score {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  margin: 14px 0 24px;
}

.score-big {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -1px;
}

.score-pct {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--highlight);
}

.score-sub {
  font-size: 0.92rem;
  color: var(--text-dim);
}

.breakdown {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}

.breakdown-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  background: var(--panel);
  border: 1px solid var(--panel-light);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.9rem;
}

.breakdown-row .br-anchor { font-weight: 700; color: var(--highlight); }
.breakdown-row .br-stat { color: var(--text-dim); }
.breakdown-row .br-pts { font-weight: 700; color: var(--accent); }

.results-buttons { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.results-buttons .primary-btn { width: auto; padding: 12px 28px; }

/* ── Loading ─────────────────────────────────────────── */

#loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 22, 32, 0.94);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  z-index: 100;
  color: var(--text-dim);
}

#loading-overlay.hidden { display: none; }

.spinner {
  width: 42px;
  height: 42px;
  border: 4px solid var(--panel-light);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

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

/* ── Responsive ──────────────────────────────────────── */

@media (max-width: 720px) {
  #app { padding: 14px; }
  h1 { font-size: 1.7rem; }
  .options-grid, .options-grid.three-col, .options-grid.four-col { grid-template-columns: repeat(2, 1fr); }
  .answer-form { flex-direction: column; }
  .primary-btn.compact { width: 100%; }
  .action-row .ghost-btn { flex: 1; }
}

/* ── Duels ───────────────────────────────────────────── */

.option-btn-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: auto;
  padding: 11px 22px;
  font-weight: 700;
}

body.duels-mode #difficulty-group { display: none; }

.duel-hud {
  display: flex;
  align-items: center;
  gap: 10px;
}

.duel-player-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--panel);
  border: 2px solid transparent;
  border-radius: 8px;
  padding: 3px 14px;
  min-width: 78px;
  opacity: 0.45;
  transition: border-color 0.2s, opacity 0.2s;
}

.duel-player-chip.active { border-color: var(--accent); opacity: 1; }

.duel-player-name {
  font-size: 0.68rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 110px;
}

.duel-player-score {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1.2;
}

.duel-vs { font-size: 0.8rem; color: var(--text-dim); }

.duel-winner-line {
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 1.2rem;
  font-weight: 700;
}

.duel-winner-line .dw-name { color: var(--text-dim); }
.duel-winner-line .dw-name.won { color: var(--accent); }
.duel-winner-line .dw-pts { color: var(--text); }

/* ── Modals ──────────────────────────────────────────── */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(7, 12, 18, 0.82);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 20px;
}

.modal-overlay.hidden { display: none; }

.modal-box {
  background: var(--panel);
  border: 1px solid var(--panel-light);
  border-radius: 16px;
  padding: 28px;
  max-width: 440px;
  width: 100%;
  text-align: center;
}

.modal-box h2 { margin-top: 0; font-size: 1.4rem; }
.modal-box ul { text-align: left; line-height: 1.9; padding-left: 1.2rem; color: var(--text-dim); font-size: 0.92rem; }
.modal-box ul strong { color: var(--accent); }
.modal-box .primary-btn { margin-top: 18px; }

.modal-label {
  margin: 16px 0 8px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-dim);
}

.modal-sub { color: var(--text-dim); font-size: 0.92rem; margin: 6px 0 0; }

.player-name-input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--panel-light);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}

.player-name-input:focus { border-color: var(--accent); }
.player-name-input::placeholder { color: #6b7f92; }

#player-setup-difficulties .option-btn { padding: 10px 12px; text-align: center; align-items: center; }