:root {
  color-scheme: dark;
  --navy-950: #04101d;
  --navy-900: #061525;
  --navy-850: #081c31;
  --navy-800: #0b2742;
  --navy-700: #123b5d;
  --ocean-500: #23779a;
  --teal-500: #1b8a91;
  --gold-300: #ffe08a;
  --gold-400: #f7c84b;
  --gold-500: #eaaa23;
  --sand-50: #fffaf0;
  --sand-100: #f5eddd;
  --sand-300: #c9c1b3;
  --green-400: #91c916;
  --correct: #62d6a3;
  --wrong: #79a8ff;
  --danger: #ff7c83;
  --border: rgba(255, 255, 255, 0.19);
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.34);
  --radius-lg: 24px;
  --radius-md: 16px;
  --font: "Yu Gothic UI", "Hiragino Sans", "Noto Sans JP", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--navy-950);
}

body {
  min-height: 100dvh;
  margin: 0;
  overflow-x: hidden;
  color: var(--sand-50);
  font-family: var(--font);
  background:
    radial-gradient(circle at 50% 24%, rgba(24, 87, 128, 0.2), transparent 38rem),
    linear-gradient(155deg, #051323, #071d32 54%, #04111f);
}

button,
a {
  font: inherit;
}

button {
  color: inherit;
}

button:focus-visible,
a:focus-visible {
  outline: 3px solid var(--gold-300);
  outline-offset: 4px;
}

[hidden] {
  display: none !important;
}

.ocean-texture {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.34;
  background-image:
    radial-gradient(circle at 18% 24%, transparent 0 22px, rgba(87, 159, 194, 0.11) 23px 24px, transparent 25px 40px),
    radial-gradient(circle at 83% 72%, transparent 0 42px, rgba(87, 159, 194, 0.09) 43px 44px, transparent 45px 68px);
  background-size: 190px 190px, 270px 270px;
  mask-image: linear-gradient(to bottom, black, rgba(0, 0, 0, 0.35));
}

.game-header {
  width: min(1440px, 100%);
  height: 92px;
  margin: 0 auto;
  padding: max(20px, env(safe-area-inset-top)) max(28px, env(safe-area-inset-right)) 14px max(28px, env(safe-area-inset-left));
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  color: var(--sand-50);
  text-decoration: none;
}

.brand::after {
  content: "";
  position: absolute;
  top: 78px;
  left: max(28px, calc((100vw - 1440px) / 2 + 28px));
  width: 330px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold-400), rgba(247, 200, 75, 0));
}

.brand-star {
  color: var(--sand-50);
  font-size: 36px;
  line-height: 1;
}

.brand-name {
  color: var(--sand-50);
  font-size: 27px;
  font-weight: 900;
  letter-spacing: -0.04em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.map-link,
.icon-button {
  border: 1px solid transparent;
  color: var(--sand-100);
  background: transparent;
  text-decoration: none;
  transition: color 150ms ease, background 150ms ease, border-color 150ms ease;
}

.map-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 700;
}

.map-link:hover,
.icon-button:hover {
  color: var(--gold-300);
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(247, 200, 75, 0.22);
}

.map-link svg,
.icon-button svg,
.secondary-button svg {
  width: 23px;
  height: 23px;
  fill: currentColor;
}

.icon-button {
  width: 44px;
  height: 44px;
  padding: 9px;
  border-radius: 50%;
  cursor: pointer;
}

.icon-button[aria-pressed="false"] {
  opacity: 0.48;
}

.game-shell {
  width: min(1440px, calc(100% - 48px));
  min-height: calc(100dvh - 116px);
  margin: 0 auto 24px;
  display: grid;
}

.screen {
  position: relative;
  min-height: min(780px, calc(100dvh - 116px));
  align-self: stretch;
  overflow: hidden;
  border: 1.5px solid rgba(247, 200, 75, 0.86);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(130deg, rgba(7, 29, 50, 0.95), rgba(4, 18, 33, 0.92)),
    var(--navy-900);
  box-shadow: var(--shadow), inset 0 0 80px rgba(19, 75, 111, 0.1);
}

.screen::before,
.screen::after {
  content: "✹";
  position: absolute;
  color: var(--gold-400);
  opacity: 0.8;
  font-size: 44px;
  line-height: 1;
  pointer-events: none;
}

.screen::before {
  left: 32px;
  bottom: 30px;
  transform: rotate(13deg);
}

.screen::after {
  right: 34px;
  top: 30px;
  opacity: 0.15;
  font-size: 28px;
}

.loading-screen,
.error-screen {
  display: grid;
  place-content: center;
  justify-items: center;
  text-align: center;
}

.loading-star {
  color: var(--gold-400);
  font-size: 56px;
  animation: spin 2.4s linear infinite;
}

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

.start-screen {
  padding: clamp(48px, 7vw, 96px);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(350px, 0.95fr);
  align-items: center;
  gap: 60px;
}

.start-copy {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.start-copy h1 {
  margin: 0;
  font-size: clamp(50px, 5.3vw, 78px);
  line-height: 1.08;
  letter-spacing: -0.045em;
  text-shadow: 0 5px 24px rgba(0, 0, 0, 0.3);
}

.start-copy h1 span {
  white-space: nowrap;
  color: var(--gold-400);
}

.start-lead {
  max-width: 610px;
  margin: 28px 0 30px;
  color: var(--sand-300);
  font-size: clamp(17px, 1.6vw, 23px);
  line-height: 1.8;
}

.start-lead strong {
  color: var(--sand-50);
}

.rules {
  width: min(620px, 100%);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-bottom: 18px;
  border-block: 1px solid var(--border);
}

.rules > div {
  padding: 17px 12px;
  text-align: center;
}

.rules > div + div {
  border-left: 1px solid var(--border);
}

.rules strong,
.rules span {
  display: block;
}

.rules strong {
  color: var(--gold-300);
  font-size: clamp(23px, 2.1vw, 34px);
  line-height: 1.1;
}

.rules span {
  margin-top: 6px;
  color: var(--sand-300);
  font-size: 12px;
  font-weight: 700;
}

.same-rule,
.best-score {
  color: var(--sand-300);
  font-size: 13px;
}

.same-rule {
  margin: 0 0 24px;
}

.best-score {
  margin: 14px 0 0;
}

.primary-button,
.secondary-button {
  min-height: 58px;
  padding: 0 34px;
  border-radius: 15px;
  font-weight: 800;
  font-size: 17px;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform 150ms ease, filter 150ms ease, box-shadow 150ms ease;
}

.primary-button {
  border: 1px solid #ffe68e;
  color: #142032;
  background: linear-gradient(180deg, #ffe177, var(--gold-400));
  box-shadow: 0 8px 26px rgba(234, 170, 35, 0.22), inset 0 1px rgba(255, 255, 255, 0.5);
}

.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-2px);
  filter: brightness(1.08);
}

.primary-button:active,
.secondary-button:active {
  transform: translateY(0);
}

.start-visual {
  position: relative;
  height: min(560px, 58vh);
  min-height: 430px;
}

.nauru-orbit {
  position: absolute;
  inset: 4% 2% 12% 2%;
  border: 1px solid rgba(247, 200, 75, 0.3);
  border-radius: 50%;
  transform: rotate(-8deg);
}

.nauru-orbit::before,
.nauru-orbit::after {
  content: "";
  position: absolute;
  inset: 13%;
  border: 1px dashed rgba(123, 193, 222, 0.25);
  border-radius: 50%;
}

.nauru-orbit::after {
  inset: 30%;
  background: radial-gradient(circle, rgba(247, 200, 75, 0.14), transparent 68%);
}

.orbit-label {
  position: absolute;
  z-index: 1;
  padding: 8px 15px;
  border: 1px solid rgba(112, 188, 217, 0.36);
  border-radius: 999px;
  color: var(--sand-100);
  background: rgba(8, 35, 58, 0.92);
  font-size: 13px;
  font-weight: 800;
  transform: rotate(8deg);
}

.orbit-label.top { left: 18%; top: -18px; }
.orbit-label.right { right: -18px; top: 38%; }
.orbit-label.bottom { left: 20%; bottom: -18px; }

.nauru-area {
  position: absolute;
  z-index: 2;
  left: 50%;
  top: 46%;
  transform: translate(-50%, -50%) rotate(8deg);
  text-align: center;
}

.nauru-area strong {
  display: block;
  color: var(--gold-400);
  font-size: clamp(76px, 9vw, 134px);
  line-height: 0.9;
}

.nauru-area span {
  color: var(--sand-100);
  font-size: 20px;
  font-weight: 800;
}

.mascot {
  /* 公式のナウルくん輪郭は画像のまま使用する。輪郭自体を変形・描き足ししない。 */
  display: block;
  object-fit: contain;
  filter: drop-shadow(0 20px 24px rgba(0, 0, 0, 0.34));
  user-select: none;
}

.mascot-start {
  position: absolute;
  right: -3%;
  bottom: -7%;
  width: min(265px, 47%);
  transform: rotate(6deg);
}

.quiz-screen {
  padding: clamp(28px, 3.5vw, 56px) clamp(34px, 6vw, 90px) 30px;
  display: grid;
  grid-template-rows: auto 1fr auto auto;
}

.hud {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 28px;
}

.progress-wrap {
  max-width: 360px;
}

.question-count {
  color: var(--sand-100);
  font-size: clamp(24px, 2.8vw, 40px);
  font-weight: 900;
}

.question-count::first-letter {
  color: var(--gold-400);
}

.progress-track {
  height: 5px;
  margin-top: 12px;
  overflow: hidden;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.11);
}

#progress-bar {
  width: 10%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--gold-500), var(--gold-300));
  transition: width 260ms ease;
}

.score-wrap {
  min-width: 176px;
  padding-inline: 34px;
  border-inline: 1px solid var(--border);
  text-align: center;
}

.score-wrap span,
.score-wrap strong {
  display: block;
}

.score-wrap span {
  color: var(--sand-300);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.score-wrap strong {
  margin-top: 2px;
  color: var(--gold-300);
  font-size: 34px;
  font-variant-numeric: tabular-nums;
}

.timer {
  position: relative;
  justify-self: end;
  width: 76px;
  height: 76px;
}

.timer svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.timer circle {
  fill: none;
  stroke-width: 5;
}

.timer-bg {
  stroke: rgba(255, 255, 255, 0.12);
}

.timer-ring {
  stroke: var(--gold-400);
  stroke-linecap: round;
  stroke-dasharray: 150.8;
  stroke-dashoffset: 0;
  transition: stroke 180ms ease;
}

.timer.warning .timer-ring {
  stroke: var(--danger);
}

.timer strong {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--gold-300);
  font-size: 27px;
  font-variant-numeric: tabular-nums;
}

.timer.warning strong {
  color: var(--danger);
}

.question-stage {
  align-self: center;
  padding: 28px 0 10px;
  text-align: center;
}

.question-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.category-label,
.location-label {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  padding: 8px 24px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 800;
}

.category-label {
  min-width: 118px;
  border: 1px solid rgba(100, 201, 205, 0.26);
  color: var(--sand-50);
  background: linear-gradient(180deg, rgba(31, 105, 126, 0.9), rgba(19, 73, 91, 0.9));
}

.location-label {
  max-width: min(520px, 72vw);
  border: 1px solid rgba(255, 220, 133, 0.34);
  color: var(--gold-100);
  background: rgba(32, 47, 53, 0.82);
}

.location-label::before {
  content: "所在地";
  margin-right: 9px;
  color: rgba(255, 255, 255, 0.62);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.question-stage h2 {
  margin: 24px 0 20px;
  font-size: clamp(39px, 5vw, 70px);
  line-height: 1.2;
  letter-spacing: -0.035em;
  text-wrap: balance;
  text-shadow: 0 5px 20px rgba(0, 0, 0, 0.32);
}

.mobile-break {
  display: none;
}

.reference-line {
  position: relative;
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
}

.reference-line::before,
.reference-line::after {
  content: "";
  width: min(16vw, 180px);
  border-top: 2px dotted rgba(172, 203, 215, 0.35);
}

.place-dot {
  position: absolute;
  left: calc(50% - 250px);
  width: 48px;
  height: 34px;
  border-radius: 52% 35% 58% 42%;
  background: rgba(108, 159, 184, 0.66);
  transform: rotate(-18deg);
}

.nauru-reference {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 24px;
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 15px;
  background: rgba(4, 17, 31, 0.48);
  white-space: nowrap;
}

.nauru-reference span {
  font-size: 16px;
  font-weight: 800;
}

.nauru-reference strong {
  color: var(--gold-400);
  font-size: 34px;
}

.mascot-quiz {
  position: absolute;
  right: 3%;
  bottom: -25px;
  width: clamp(110px, 11vw, 170px);
  transform: rotate(4deg);
}

.answer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(14px, 2.3vw, 32px);
}

.answer-button {
  min-height: 126px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  border: 2px solid rgba(113, 173, 255, 0.68);
  border-radius: 20px;
  color: var(--sand-50);
  background:
    linear-gradient(180deg, rgba(21, 70, 111, 0.92), rgba(10, 42, 73, 0.96));
  box-shadow: inset 0 0 0 5px rgba(117, 177, 255, 0.08), 0 10px 25px rgba(0, 0, 0, 0.2);
  font-size: clamp(27px, 3vw, 43px);
  font-weight: 900;
  cursor: pointer;
  transition: transform 130ms ease, border-color 130ms ease, background 130ms ease, box-shadow 130ms ease;
}

.answer-button.same {
  border-color: rgba(41, 193, 188, 0.72);
  background: linear-gradient(180deg, rgba(20, 91, 103, 0.94), rgba(8, 54, 70, 0.98));
  box-shadow: inset 0 0 0 5px rgba(56, 206, 197, 0.08), 0 10px 25px rgba(0, 0, 0, 0.2);
}

.answer-button:hover:not(:disabled) {
  z-index: 1;
  transform: translateY(-4px);
  border-color: var(--gold-300);
  box-shadow: inset 0 0 0 5px rgba(247, 200, 75, 0.08), 0 15px 34px rgba(0, 0, 0, 0.3);
}

.answer-button:disabled {
  cursor: default;
}

.answer-button.dimmed {
  opacity: 0.36;
}

.answer-button.correct {
  border-color: var(--correct);
  background: linear-gradient(180deg, rgba(31, 120, 97, 0.95), rgba(10, 68, 62, 0.98));
}

.answer-button.wrong {
  border-color: var(--danger);
  background: linear-gradient(180deg, rgba(130, 51, 65, 0.92), rgba(72, 29, 46, 0.98));
}

.answer-button .key {
  width: 47px;
  height: 47px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: 50%;
  font-size: 18px;
}

.keyboard-hint {
  margin: 18px 0 0;
  color: rgba(245, 237, 221, 0.62);
  font-size: 12px;
  font-weight: 700;
  text-align: center;
}

.answer-feedback {
  position: absolute;
  z-index: 5;
  inset: auto 50% 30px auto;
  width: min(680px, calc(100% - 48px));
  min-height: 94px;
  transform: translateX(50%);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 16px 24px;
  border: 1px solid rgba(98, 214, 163, 0.62);
  border-radius: 18px;
  background: rgba(6, 28, 38, 0.97);
  box-shadow: 0 18px 55px rgba(0, 0, 0, 0.48);
  animation: feedback-in 220ms ease both;
}

.answer-feedback.wrong-feedback {
  border-color: rgba(255, 124, 131, 0.6);
}

@keyframes feedback-in {
  from { opacity: 0; transform: translate(50%, 12px); }
}

.feedback-mark {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  border: 3px solid var(--correct);
  border-radius: 50%;
  color: var(--correct);
  font-size: 38px;
  font-weight: 900;
}

.wrong-feedback .feedback-mark {
  border-color: var(--danger);
  color: var(--danger);
}

.answer-feedback strong {
  font-size: 19px;
}

.answer-feedback p {
  margin: 4px 0 0;
  color: var(--sand-300);
  font-size: 13px;
}

.earned-score {
  color: var(--gold-300);
  font-size: 24px;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
}

.result-screen {
  padding: clamp(28px, 3.4vw, 52px) clamp(30px, 5.4vw, 80px) 32px;
  overflow-y: auto;
}

.result-hero {
  position: relative;
  min-height: 205px;
  display: grid;
  place-items: center;
  text-align: center;
}

.result-copy {
  position: relative;
  z-index: 2;
}

.result-copy h1 {
  margin: 0 0 3px;
  color: var(--sand-100);
  font-size: 24px;
}

.final-score {
  color: var(--gold-400);
  line-height: 1;
}

.final-score strong {
  font-size: clamp(64px, 8vw, 108px);
  letter-spacing: -0.05em;
  font-variant-numeric: tabular-nums;
}

.final-score span {
  margin-left: 8px;
  font-size: 30px;
  font-weight: 900;
}

.result-copy h2 {
  margin: 5px 0 0;
  font-size: clamp(32px, 4vw, 56px);
}

.mascot-result {
  position: absolute;
  right: 6%;
  bottom: -12px;
  width: clamp(128px, 14vw, 205px);
  transform: rotate(5deg);
}

.result-summary {
  width: min(960px, 100%);
  margin: 8px auto 18px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgba(5, 22, 39, 0.55);
}

.result-summary > div {
  min-height: 75px;
  display: grid;
  place-content: center;
  text-align: center;
}

.result-summary > div + div {
  border-left: 1px solid var(--border);
}

.result-summary strong,
.result-summary span {
  display: block;
}

.result-summary strong {
  color: var(--gold-300);
  font-size: 23px;
}

.result-summary span {
  margin-top: 3px;
  color: var(--sand-300);
  font-size: 11px;
  font-weight: 700;
}

#best-summary.is-new strong,
#best-summary.is-new span {
  color: var(--gold-300);
}

.review-wrap {
  width: min(960px, 100%);
  margin: 0 auto;
}

.review-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 9px;
}

.review-heading h3 {
  margin: 0;
  font-size: 17px;
}

.review-heading span {
  color: var(--sand-300);
  font-size: 11px;
}

.review-list {
  max-height: 265px;
  margin: 0;
  padding: 0;
  overflow-y: auto;
  list-style: none;
  border-block: 1px solid var(--border);
  scrollbar-color: var(--navy-700) transparent;
}

.review-item {
  min-height: 52px;
  display: grid;
  grid-template-columns: 42px minmax(170px, 1fr) 110px 130px 38px;
  align-items: center;
  gap: 14px;
  padding: 8px 12px;
  color: var(--sand-100);
}

.review-item + .review-item {
  border-top: 1px solid rgba(255, 255, 255, 0.09);
}

.review-index {
  color: var(--sand-300);
  font-size: 13px;
  font-weight: 800;
}

.review-place {
  overflow: hidden;
}

.review-place strong,
.review-place small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.review-place strong {
  font-size: 15px;
}

.review-place small {
  margin-top: 2px;
  color: var(--sand-300);
  font-size: 10px;
}

.review-answer {
  justify-self: start;
  padding: 5px 12px;
  border-radius: 999px;
  color: var(--sand-100);
  background: rgba(31, 105, 126, 0.52);
  font-size: 11px;
  font-weight: 800;
}

.review-area {
  justify-self: end;
  font-size: 14px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.review-result {
  justify-self: center;
  font-size: 22px;
  font-weight: 900;
}

.review-result.correct-result { color: var(--correct); }
.review-result.wrong-result { color: var(--danger); }

.review-map {
  color: inherit;
  text-decoration: none;
}

.review-map:hover .review-place strong {
  color: var(--gold-300);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.result-share-preview {
  width: min(520px, 100%);
  margin: 18px auto 4px;
  padding: 7px;
  border: 1px solid rgba(245, 197, 66, 0.38);
  border-radius: 15px;
  background: rgba(5, 22, 39, 0.72);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.24);
}

.result-share-preview img {
  width: 100%;
  aspect-ratio: 1200 / 630;
  display: block;
  object-fit: cover;
  border-radius: 10px;
  background: rgba(5, 22, 39, 0.82);
}

.result-share-preview figcaption {
  padding: 7px 5px 2px;
  color: var(--sand-300);
  font-size: 10px;
  font-weight: 700;
  text-align: center;
}

.result-actions {
  width: min(960px, 100%);
  margin: 20px auto 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
}

.ranking-link-button,
.ranking-close-button,
.ranking-reload-button {
  border: 0;
  color: var(--sand-100);
  background: transparent;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.ranking-link-button {
  margin-top: 14px;
  padding: 9px 14px;
  color: var(--gold-300);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.ranking-action-button {
  border-color: rgba(245, 197, 66, 0.72);
  background: linear-gradient(180deg, rgba(127, 93, 18, 0.96), rgba(75, 50, 8, 0.98));
}

.ranking-screen {
  padding: clamp(28px, 4vw, 54px) clamp(18px, 5vw, 70px);
  overflow-y: auto;
}

.ranking-header {
  width: min(820px, 100%);
  margin: 0 auto 22px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
}

.ranking-header p {
  margin: 0 0 5px;
  color: var(--gold-300);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.16em;
}

.ranking-header h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 56px);
}

.ranking-close-button {
  min-width: 74px;
  padding: 10px 12px;
  border-bottom: 1px solid currentColor;
}

.ranking-form,
.ranking-board {
  width: min(820px, 100%);
  margin-inline: auto;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(5, 22, 39, 0.7);
}

.ranking-form {
  margin-bottom: 18px;
  padding: 18px 20px;
}

.ranking-score-preview {
  margin-bottom: 13px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.ranking-score-preview span,
.ranking-form label {
  color: var(--sand-300);
  font-size: 12px;
  font-weight: 800;
}

.ranking-score-preview strong {
  color: var(--gold-300);
  font-size: 25px;
}

.ranking-form label {
  display: block;
  margin-bottom: 7px;
}

.ranking-input-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

.ranking-input-row input {
  min-width: 0;
  min-height: 54px;
  padding: 0 15px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 12px;
  outline: 0;
  color: var(--sand-50);
  background: rgba(2, 13, 24, 0.82);
  font: inherit;
  font-size: 16px;
  font-weight: 800;
}

.ranking-input-row input:focus {
  border-color: var(--gold-300);
  box-shadow: 0 0 0 3px rgba(245, 197, 66, 0.16);
}

.ranking-input-row .primary-button {
  min-height: 54px;
  padding-inline: 24px;
}

.ranking-name-meta {
  margin-top: 7px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--sand-300);
  font-size: 10px;
}

.ranking-form-message {
  min-height: 1.4em;
  margin: 9px 0 0;
  color: var(--gold-300);
  font-size: 12px;
  font-weight: 800;
}

.ranking-board {
  overflow: hidden;
}

.ranking-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--border);
}

.ranking-tab {
  min-height: 54px;
  border: 0;
  color: var(--sand-300);
  background: transparent;
  font: inherit;
  font-size: 14px;
  font-weight: 900;
  cursor: pointer;
}

.ranking-tab + .ranking-tab {
  border-left: 1px solid var(--border);
}

.ranking-tab.is-active {
  color: var(--navy-900);
  background: var(--gold-300);
}

.ranking-period-note {
  margin: 0;
  padding: 12px 18px 8px;
  color: var(--sand-300);
  font-size: 10px;
  text-align: right;
}

.ranking-loading,
.ranking-empty {
  padding: 52px 20px;
  color: var(--sand-300);
  text-align: center;
  font-size: 13px;
}

.ranking-list {
  margin: 0;
  padding: 0 18px 14px;
  list-style: none;
}

.ranking-entry {
  min-height: 54px;
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) 112px 88px;
  align-items: center;
  gap: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.ranking-position {
  color: var(--sand-300);
  font-size: 15px;
  font-weight: 900;
  text-align: center;
}

.ranking-entry:nth-child(1) .ranking-position,
.ranking-entry:nth-child(2) .ranking-position,
.ranking-entry:nth-child(3) .ranking-position {
  color: var(--gold-300);
  font-size: 20px;
}

.ranking-player {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 15px;
  font-weight: 900;
}

.ranking-entry-score {
  color: var(--gold-300);
  font-size: 17px;
  font-weight: 900;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.ranking-entry-detail {
  color: var(--sand-300);
  font-size: 10px;
  text-align: right;
}

.ranking-reload-button {
  display: block;
  margin: 0 auto 20px;
  padding: 10px;
  color: var(--gold-300);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.secondary-button {
  min-height: 58px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  border: 1px solid rgba(47, 201, 198, 0.7);
  color: var(--sand-50);
  background: linear-gradient(180deg, rgba(24, 116, 126, 0.92), rgba(12, 68, 82, 0.96));
  box-shadow: inset 0 0 0 4px rgba(56, 206, 197, 0.06);
}

.x-share-button {
  border-color: rgba(255, 255, 255, 0.42);
  background: linear-gradient(180deg, rgba(31, 39, 48, 0.98), rgba(7, 12, 18, 0.98));
}

.x-mark {
  font-size: 22px;
  font-weight: 900;
}

.text-action {
  padding: 12px 4px;
  border-bottom: 1px solid currentColor;
  color: var(--sand-50);
  font-weight: 800;
  text-decoration: none;
}

.text-action:hover {
  color: var(--gold-300);
}

.error-screen {
  padding: 32px;
}

.error-star {
  color: var(--gold-400);
  font-size: 52px;
}

.error-screen h1 {
  margin: 14px 0 8px;
}

.error-screen p {
  margin: 0 0 24px;
  color: var(--sand-300);
}

.toast {
  position: fixed;
  z-index: 20;
  left: 50%;
  bottom: max(28px, env(safe-area-inset-bottom));
  max-width: min(520px, calc(100% - 32px));
  transform: translateX(-50%);
  padding: 12px 20px;
  border: 1px solid rgba(247, 200, 75, 0.44);
  border-radius: 12px;
  color: var(--sand-50);
  background: rgba(4, 16, 29, 0.96);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.4);
  font-size: 13px;
  font-weight: 700;
}

@media (max-height: 820px) and (min-width: 860px) {
  .game-header { height: 76px; padding-top: 13px; padding-bottom: 10px; }
  .brand::after { top: 66px; }
  .brand-name { font-size: 24px; }
  .brand-star { font-size: 30px; }
  .game-shell { min-height: calc(100dvh - 92px); }
  .screen { min-height: calc(100dvh - 92px); }
  .start-screen { padding: 30px 62px; gap: 36px; }
  .start-copy h1 { font-size: clamp(45px, 5.1vw, 64px); }
  .start-lead { margin: 18px 0 20px; font-size: 16px; line-height: 1.65; }
  .rules { margin-bottom: 12px; }
  .rules > div { padding: 12px 8px; }
  .same-rule { margin-bottom: 14px; }
  .start-visual { height: 410px; min-height: 0; }
  .start-copy .primary-button { min-height: 52px; }
  .quiz-screen { padding-top: 24px; padding-bottom: 20px; }
  .answer-button { min-height: 105px; }
  .question-stage { padding-top: 14px; }
  .question-stage h2 { margin: 15px 0 12px; }
  .answer-feedback { bottom: 18px; }
  .result-screen { padding-top: 18px; }
  .result-hero { min-height: 165px; }
  .final-score strong { font-size: 72px; }
  .result-copy h2 { font-size: 36px; }
  .mascot-result { width: 155px; }
  .review-list { max-height: 235px; }
}

@media (max-width: 820px) {
  body { min-height: 100dvh; }
  .game-header {
    height: 70px;
    padding: max(12px, env(safe-area-inset-top)) max(14px, env(safe-area-inset-right)) 9px max(14px, env(safe-area-inset-left));
  }
  .brand::after { display: none; }
  .brand { gap: 7px; }
  .brand-star { font-size: 25px; }
  .brand-name { font-size: 20px; }
  .map-link { padding: 8px; font-size: 0; }
  .map-link svg { width: 26px; height: 26px; }
  .icon-button { width: 40px; height: 40px; }
  .header-actions { gap: 2px; }
  .game-shell {
    width: calc(100% - 20px);
    min-height: calc(100dvh - 82px);
    margin-bottom: max(10px, env(safe-area-inset-bottom));
  }
  .screen {
    min-height: calc(100dvh - 82px - env(safe-area-inset-bottom));
    border-radius: 18px;
  }
  .screen::before { left: 16px; bottom: 16px; font-size: 29px; }
  .start-screen {
    padding: 32px 22px 24px;
    grid-template-columns: 1fr;
    align-content: center;
    gap: 18px;
    text-align: center;
  }
  .start-copy { max-width: none; }
  .start-copy h1 { font-size: clamp(40px, 12vw, 58px); line-height: 1.1; }
  .start-lead { margin: 20px auto; font-size: 15px; line-height: 1.7; }
  .rules { margin-inline: auto; }
  .rules > div { padding: 13px 5px; }
  .rules strong { font-size: 23px; }
  .rules span { font-size: 10px; }
  .start-copy .primary-button { width: 100%; }
  .start-visual {
    order: -1;
    height: 185px;
    min-height: 0;
  }
  .nauru-orbit { inset: 0 19% 8%; }
  .nauru-area strong { font-size: 58px; }
  .nauru-area span { font-size: 12px; }
  .orbit-label { padding: 4px 9px; font-size: 9px; }
  .orbit-label.right { right: -28px; }
  .mascot-start { right: 7%; bottom: -5%; width: 112px; }
  .quiz-screen {
    padding: 20px 16px 18px;
    grid-template-rows: auto 1fr auto auto;
  }
  .hud {
    grid-template-columns: 1fr auto auto;
    gap: 12px;
  }
  .progress-wrap { min-width: 0; }
  .question-count { font-size: 23px; }
  .progress-track { margin-top: 7px; }
  .score-wrap {
    min-width: 90px;
    padding-inline: 13px;
    border-left: 1px solid var(--border);
    border-right: 0;
  }
  .score-wrap span { font-size: 9px; }
  .score-wrap strong { font-size: 21px; }
  .timer { width: 56px; height: 56px; }
  .timer strong { font-size: 20px; }
  .question-stage { padding: 20px 0 8px; }
  .category-label,
  .location-label {
    min-width: 86px;
    min-height: 32px;
    padding: 5px 17px;
    font-size: 12px;
  }
  .location-label {
    max-width: 76vw;
  }
  .location-label::before {
    margin-right: 6px;
    font-size: 9px;
  }
  .question-stage h2 {
    margin: 16px 0 15px;
    font-size: clamp(32px, 9.5vw, 48px);
    line-height: 1.25;
  }
  .mobile-break { display: block; }
  .reference-line { min-height: 58px; gap: 8px; }
  .reference-line::before,
  .reference-line::after { width: 12vw; }
  .place-dot { display: none; }
  .nauru-reference { padding: 7px 16px; }
  .nauru-reference span { font-size: 13px; }
  .nauru-reference strong { font-size: 27px; }
  .mascot-quiz {
    right: 0;
    bottom: -10px;
    width: 82px;
  }
  .answer-grid {
    grid-template-columns: 1fr;
    gap: 9px;
  }
  .answer-button {
    min-height: 70px;
    justify-content: flex-start;
    padding: 0 24px;
    gap: 22px;
    border-radius: 15px;
    font-size: 26px;
  }
  .answer-button .key {
    width: 38px;
    height: 38px;
    font-size: 15px;
  }
  .keyboard-hint { margin: 10px 0 0; font-size: 10px; }
  .answer-feedback {
    inset: auto 12px 14px;
    width: auto;
    min-height: 82px;
    transform: none;
    grid-template-columns: auto 1fr;
    gap: 12px;
    padding: 13px;
  }
  @keyframes feedback-in {
    from { opacity: 0; transform: translateY(12px); }
  }
  .feedback-mark { width: 46px; height: 46px; font-size: 30px; }
  .answer-feedback strong { font-size: 16px; }
  .answer-feedback p { font-size: 11px; }
  .earned-score {
    position: absolute;
    right: 14px;
    top: 12px;
    font-size: 17px;
  }
  .result-screen {
    padding: 24px 16px max(22px, env(safe-area-inset-bottom));
  }
  .result-hero { min-height: 180px; }
  .result-copy h1 { font-size: 18px; }
  .final-score strong { font-size: clamp(58px, 18vw, 82px); }
  .final-score span { font-size: 22px; }
  .result-copy h2 { font-size: 30px; }
  .mascot-result {
    right: 8px;
    top: 8px;
    bottom: auto;
    width: 62px;
    opacity: 0.82;
  }
  .result-summary { margin-top: 0; }
  .result-summary > div { min-height: 66px; }
  .result-summary strong { font-size: 17px; }
  #best-summary strong {
    font-size: 13px;
    line-height: 1.15;
  }
  .review-heading { display: block; }
  .review-heading span { display: block; margin-top: 3px; }
  .review-list { max-height: 300px; }
  .review-item {
    grid-template-columns: 27px minmax(0, 1fr) 72px 28px;
    gap: 7px;
    padding: 8px 4px;
  }
  .review-answer { padding: 4px 7px; font-size: 9px; }
  .review-area { grid-column: 2 / 4; justify-self: start; margin-top: -5px; color: var(--sand-300); font-size: 11px; }
  .review-result { grid-column: 4; grid-row: 1 / 3; }
  .result-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }
  .result-actions .primary-button,
  .result-actions .secondary-button {
    min-height: 54px;
    padding: 0 12px;
    justify-content: center;
    font-size: 14px;
  }
  .result-actions .ranking-action-button {
    grid-column: 1 / -1;
  }
  .result-actions #share-button {
    grid-column: 1 / -1;
  }
  .result-actions .text-action {
    grid-column: 1 / -1;
    justify-self: center;
  }
  .ranking-screen {
    padding: 24px 12px max(22px, env(safe-area-inset-bottom));
  }
  .ranking-header {
    align-items: center;
    margin-bottom: 15px;
  }
  .ranking-header h1 { font-size: 34px; }
  .ranking-form { padding: 15px; }
  .ranking-input-row { grid-template-columns: 1fr; }
  .ranking-input-row .primary-button { width: 100%; }
  .ranking-entry {
    grid-template-columns: 36px minmax(0, 1fr) 92px;
    gap: 8px;
  }
  .ranking-entry-detail {
    grid-column: 2 / 4;
    margin-top: -9px;
    padding-bottom: 8px;
    text-align: left;
  }
}

@media (max-width: 390px), (max-height: 690px) and (max-width: 820px) {
  .start-screen { padding-top: 20px; }
  .start-visual { height: 125px; }
  .orbit-label { display: none; }
  .mascot-start { width: 85px; }
  .start-copy h1 { font-size: 36px; }
  .start-lead { margin: 13px auto; font-size: 13px; }
  .same-rule { margin-bottom: 14px; }
  .primary-button { min-height: 52px; }
  .question-stage { padding-top: 10px; }
  .question-stage h2 { margin: 10px 0; font-size: 30px; }
  .answer-button { min-height: 59px; font-size: 22px; }
  .keyboard-hint { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}