/* ============================================================
   지하철 게임 — 스타일
   디자인 언어: 역 안내 사인 시스템(흰 바탕, 노선색 캡슐, 또렷한 고딕)
   ============================================================ */

:root {
  --ink: #23262b;
  --ink-soft: #6b7280;
  --paper: #ffffff;
  --line-blue: #0052A4;   /* 1호선 */
  --line-green: #00A84D;  /* 2호선 */
  --danger: #e5232e;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(20, 25, 40, .12);
  --ease: cubic-bezier(.22, 1, .36, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }
/* 모바일 주소창 때문에 100vh가 잘리는 문제 → dvh 사용 */
@supports (height: 100dvh) {
  html, body { height: 100dvh; }
}

body {
  font-family: "Pretendard Variable", Pretendard, -apple-system, "Apple SD Gothic Neo",
               "Noto Sans KR", sans-serif;
  color: var(--ink);
  background: var(--paper);
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
  transition: color .5s var(--ease), background-color .5s var(--ease);
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  clip: rect(0 0 0 0); overflow: hidden;
}

/* ---------------- 노선도 ---------------- */
#map-container {
  position: fixed; inset: 0;
  background:
    radial-gradient(circle at 30% 20%, #fdfdfb 0%, #f7f8fa 100%);
  transition: filter 1s var(--ease), transform 1s var(--ease), background .5s var(--ease);
}
#metro-svg { width: 100%; height: 100%; display: block; }

/* 자유 이동 가능할 때: 드래그 커서 + 브라우저 기본 제스처 차단 */
#map-container.interactive { cursor: grab; touch-action: none; }
#map-container.grabbing { cursor: grabbing; }

/* 홈/엔딩에서는 뿌옇게, 게임 중엔 선명하게 */
.at-home #map-container,
.at-end #map-container {
  filter: blur(7px) saturate(.75) brightness(1.04);
  transform: scale(1.03);
}
.in-game #map-container,
.studying #map-container { filter: none; transform: none; }

.line-path { transition: opacity .6s var(--ease); }

.station-dot { transition: r .3s var(--ease); }
.station-dot.flash-correct { animation: flash-ok .9s var(--ease); }
.station-dot.flash-wrong   { animation: flash-no .9s var(--ease); }
@keyframes flash-ok {
  0%   { fill: #ffffff; }
  30%  { fill: #b8f2cd; r: 12; }
  100% { fill: #ffffff; }
}
@keyframes flash-no {
  0%   { fill: #ffffff; }
  30%  { fill: #ffd2d2; r: 12; }
  100% { fill: #ffffff; }
}

/* 역 이름 라벨: 처음엔 숨김 → 정답 공개 시 스르륵 */
.station-label {
  font-family: inherit;
  font-size: 13px;
  font-weight: 700;
  fill: var(--ink);
  paint-order: stroke;
  stroke: #ffffff;
  stroke-width: 4px;
  stroke-linejoin: round;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity .65s var(--ease), transform .65s var(--ease), fill .5s var(--ease), stroke .5s var(--ease);
  pointer-events: none;
}
.station-label.revealed { opacity: 1; transform: translateY(0); }

/* 현재 문제 역 포커스 링 */
.focus-ring {
  fill: none;
  stroke: var(--ink);
  stroke-width: 2.5;
  stroke-dasharray: 4 5;
  transition: opacity .4s var(--ease), stroke .5s var(--ease);
}
.focus-ring.pulse { animation: ring-pulse 1.6s ease-out infinite; }
@keyframes ring-pulse {
  0%   { stroke-opacity: 1;  r: 14; }
  70%  { stroke-opacity: .25; r: 22; }
  100% { stroke-opacity: 0;  r: 26; }
}

/* ---------------- HUD ---------------- */
#hud {
  position: fixed; top: 0; left: 0; right: 0;
  display: flex; align-items: flex-start; justify-content: space-between;
  padding: max(14px, env(safe-area-inset-top)) 18px 0;
  pointer-events: none;
  opacity: 0; transform: translateY(-12px);
  transition: opacity .6s var(--ease) .3s, transform .6s var(--ease) .3s;
  z-index: 20;
}
.in-game #hud { opacity: 1; transform: none; }
.hud-left, .hud-right { flex: 1; display: flex; }
.hud-right { justify-content: flex-end; }
#hud > * { pointer-events: auto; }

.timer {
  font-size: clamp(34px, 6vw, 46px);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
  background: var(--paper);
  border: 3px solid var(--ink);
  border-radius: 999px;
  padding: 4px 26px;
  box-shadow: var(--shadow);
  transition: color .3s, border-color .3s, transform .3s;
}
.timer.danger {
  color: var(--danger);
  border-color: var(--danger);
  animation: timer-shake .8s ease-in-out infinite;
}
@keyframes timer-shake {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}

/* 연속 모드 표시 배지 (타이머 자리) */
.endless-badge {
  display: none;
  font-size: clamp(18px, 3.6vw, 24px); font-weight: 800;
  background: var(--paper);
  border: 3px solid #e8590c; color: #e8590c;
  border-radius: 999px;
  padding: 7px 20px;
  box-shadow: var(--shadow);
}
/* 연속 모드: 타이머 숨기고 배지 표시 */
.endless-mode .timer { display: none; }
.endless-mode .endless-badge { display: block; }

.hint-btn {
  font: inherit; font-weight: 700; font-size: 15px;
  background: var(--paper); color: var(--ink);
  border: 2px solid var(--ink); border-radius: 999px;
  padding: 10px 16px; cursor: pointer;
  box-shadow: var(--shadow);
  display: inline-flex; align-items: center; gap: 8px;
  transition: transform .2s var(--ease), opacity .2s;
}
.hint-btn:hover:not(:disabled) { transform: translateY(-2px); }
.hint-btn:disabled { opacity: .4; cursor: default; }
.hint-pill {
  background: var(--line-green); color: #fff;
  border-radius: 999px; min-width: 24px; height: 24px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 13px;
}

.score-box {
  background: var(--paper);
  border: 2px solid var(--ink); border-radius: var(--radius);
  padding: 8px 18px; box-shadow: var(--shadow);
  display: flex; flex-direction: column; align-items: center; line-height: 1.1;
}
.score-label { font-size: 11px; font-weight: 600; color: var(--ink-soft); }
#score { font-size: 26px; font-weight: 800; font-variant-numeric: tabular-nums; }

/* ---------------- 피드백 ---------------- */
.feedback {
  position: fixed; top: 22%; left: 50%;
  transform: translate(-50%, 10px) scale(.95);
  font-size: clamp(18px, 3.4vw, 26px); font-weight: 800;
  background: var(--paper); border-radius: 999px;
  padding: 10px 26px; box-shadow: var(--shadow);
  opacity: 0; pointer-events: none; z-index: 25;
  transition: opacity .35s var(--ease), transform .35s var(--ease);
}
.feedback.show { opacity: 1; transform: translate(-50%, 0) scale(1); }
.feedback.ok { color: var(--line-green); border: 2px solid var(--line-green); }
.feedback.no { color: var(--danger); border: 2px solid var(--danger); }

/* ---------------- 하단 입력 패널 ---------------- */
#answer-panel {
  position: fixed; left: 50%; bottom: max(16px, env(safe-area-inset-bottom));
  transform: translate(-50%, 130%);
  width: min(640px, calc(100% - 24px));
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(10px);
  border: 2px solid var(--ink);
  border-radius: 22px;
  padding: 14px 16px;
  box-shadow: var(--shadow);
  z-index: 30;
  transition: transform .7s var(--ease) .35s;
}
.in-game #answer-panel { transform: translate(-50%, 0); }

.question-row {
  display: flex; align-items: center; gap: 10px;
  flex-wrap: wrap; margin-bottom: 10px;
}
.question-lines { display: flex; gap: 6px; flex-wrap: wrap; }
.question-text { font-weight: 700; font-size: 16px; }

.line-chip {
  --c: var(--line-blue); --t: #fff;
  background: var(--c); color: var(--t);
  font-weight: 800; font-size: 13px;
  min-width: 26px; height: 26px; padding: 0 9px;
  border-radius: 999px;
  display: inline-flex; align-items: center; justify-content: center;
  box-shadow: inset 0 0 0 2px rgba(255,255,255,.25);
}
.line-chip.sm { min-width: 21px; height: 21px; font-size: 11px; padding: 0 7px; }

.hint-display {
  display: none;
  margin: -2px 0 10px;
  font-size: 15px; color: var(--ink-soft);
}
.hint-display.show { display: block; animation: rise .4s var(--ease); }
.hint-display strong { color: var(--ink); font-size: 18px; letter-spacing: .15em; }
@keyframes rise { from { opacity: 0; transform: translateY(6px); } }

.suggestions {
  display: none;
  gap: 8px; flex-wrap: wrap;
  margin-bottom: 10px;
  max-height: 184px; overflow-y: auto;
  align-content: flex-start;
  scrollbar-width: thin;
}
.suggestions.show { display: flex; animation: rise .25s var(--ease); }
.suggest-item {
  font: inherit; font-size: 14px; font-weight: 600;
  display: inline-flex; align-items: center; gap: 6px;
  background: #f3f4f7; color: var(--ink);
  border: 1.5px solid transparent; border-radius: 999px;
  padding: 6px 12px 6px 7px; cursor: pointer;
  transition: background .15s, border-color .15s, transform .15s var(--ease);
}
.suggest-item:hover, .suggest-item.active {
  background: #fff; border-color: var(--ink); transform: translateY(-1px);
}

.input-row { display: flex; gap: 10px; }
#answer-input {
  flex: 1;
  font: inherit; font-size: 18px; font-weight: 600;
  padding: 13px 18px;
  border: 2px solid #d4d7de; border-radius: 14px;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}
#answer-input:focus {
  border-color: var(--line-blue);
  box-shadow: 0 0 0 4px rgba(0, 82, 164, .14);
}
.submit-btn {
  font: inherit; font-size: 17px; font-weight: 800;
  background: var(--ink); color: #fff;
  border: none; border-radius: 14px;
  padding: 0 26px; cursor: pointer;
  transition: transform .15s var(--ease), background .2s;
}
.submit-btn:hover { background: #000; transform: translateY(-1px); }
.submit-btn:active { transform: translateY(1px); }

/* ---------------- 오버레이 (홈 / 엔딩) ---------------- */
.overlay {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  background: rgba(255, 255, 255, .35);
  opacity: 0; pointer-events: none;
  transition: opacity .8s var(--ease), background-color .5s var(--ease);
  z-index: 40;
  overflow-y: auto;
}
.at-home #home-screen,
.at-end #end-screen { opacity: 1; pointer-events: auto; }

.overlay-card {
  background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(8px);
  border: 2.5px solid var(--ink);
  border-radius: 28px;
  padding: 36px 32px;
  width: min(520px, 100%);
  text-align: center;
  box-shadow: 0 24px 60px rgba(20, 25, 40, .18);
  transform: translateY(14px);
  transition: transform .8s var(--ease), background-color .5s var(--ease), color .5s var(--ease), border-color .5s var(--ease), box-shadow .5s var(--ease);
  margin: auto;
}
.at-home .home-card, .at-end .end-card { transform: translateY(0); }

/* 역명판 스타일 타이틀 */
.title-plate {
  display: inline-flex; align-items: center; gap: 14px;
  border: 3.5px solid var(--line-blue);
  border-radius: 999px;
  padding: 10px 28px;
  margin-bottom: 14px;
  position: relative;
  background: #fff;
}
.title-plate::before, .title-plate::after {
  content: ""; position: absolute; top: 50%; height: 6px; width: 26px;
  background: var(--line-blue); transform: translateY(-50%);
}
.title-plate::before { left: -28px; border-radius: 4px 0 0 4px; }
.title-plate::after { right: -28px; border-radius: 0 4px 4px 0; }
.title-dot {
  width: 13px; height: 13px; border-radius: 50%;
  background: #fff; border: 3.5px solid var(--line-blue);
  flex: none;
}
.title-plate h1 {
  font-size: clamp(28px, 6vw, 40px);
  font-weight: 900; letter-spacing: -.01em;
}

.tagline { color: var(--ink-soft); font-size: 15px; margin-bottom: 24px; }

.mode-select {
  border: none;
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 10px; margin-bottom: 14px;
}
/* 부산: 모드가 전체/커스텀 2개뿐 → 2칸으로 절반씩 채움 */
.mode-select.two-cols { grid-template-columns: repeat(2, 1fr); }
.mode-option input { position: absolute; opacity: 0; }
.mode-card {
  display: flex; flex-direction: column; gap: 3px;
  border: 2px solid #d4d7de; border-radius: 16px;
  padding: 14px 8px; cursor: pointer;
  transition: border-color .2s, background .2s, transform .2s var(--ease);
}
.mode-card strong { font-size: 16px; }
.mode-card small { font-size: 11.5px; color: var(--ink-soft); }
.mode-option input:checked + .mode-card {
  border-color: var(--line-blue);
  background: rgba(0, 82, 164, .07);
  transform: translateY(-2px);
}
.mode-option input:focus-visible + .mode-card {
  outline: 3px solid rgba(0, 82, 164, .4); outline-offset: 2px;
}

/* 플레이 모드 선택 (시간 도전 / 연속 / 거꾸로) */
.play-mode-select {
  border: none; padding: 0;
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px; margin-bottom: 16px;
}
.play-mode-option { position: relative; }
.play-mode-option input { position: absolute; opacity: 0; }
.play-mode-card {
  display: flex; flex-direction: column; gap: 3px;
  border: 2px solid #d4d7de; border-radius: 16px;
  padding: 13px 10px; cursor: pointer; height: 100%;
  transition: border-color .2s, background .2s, transform .2s var(--ease);
}
.play-mode-card strong { font-size: 15.5px; }
.play-mode-card small { font-size: 11.5px; color: var(--ink-soft); }
.play-mode-option input:checked + .play-mode-card {
  border-color: var(--line-green, #00A84D);
  background: rgba(0, 168, 77, .08);
  transform: translateY(-2px);
}
.play-mode-option input:focus-visible + .play-mode-card {
  outline: 3px solid rgba(0, 168, 77, .4); outline-offset: 2px;
}

.play-mode-card--reverse {
  position: relative;
  background: linear-gradient(120deg, rgba(255, 80, 80, .10), rgba(255, 197, 61, .12), rgba(59, 201, 114, .10), rgba(61, 146, 255, .11), rgba(160, 78, 255, .11), rgba(255, 80, 151, .10));
  background-size: 260% 260%;
  animation: reverse-rainbow-glow 3.2s linear infinite;
}
.play-mode-option--reverse input:checked + .play-mode-card--reverse {
  background: linear-gradient(120deg, rgba(255, 80, 80, .18), rgba(255, 197, 61, .20), rgba(59, 201, 114, .17), rgba(61, 146, 255, .18), rgba(160, 78, 255, .18), rgba(255, 80, 151, .17));
  background-size: 260% 260%;
}
.play-mode-new {
  position: absolute; top: -10px; right: -7px; z-index: 2;
  color: #e11935; background: #fff; border: 1.5px solid currentColor;
  border-radius: 999px; padding: 2px 6px;
  font-size: 9px; font-weight: 950; letter-spacing: .04em; line-height: 1.2;
  transform: rotate(5deg);
  box-shadow: 0 2px 8px rgba(225, 25, 53, .20);
}
.reverse-word {
  display: inline-block;
  transform: rotate(180deg);
  transform-origin: center;
}
@keyframes reverse-rainbow-glow {
  0% { border-color: #ff5263; box-shadow: 0 0 10px rgba(255, 82, 99, .32); background-position: 0% 50%; }
  20% { border-color: #f4b52f; box-shadow: 0 0 11px rgba(244, 181, 47, .32); }
  40% { border-color: #2fbd75; box-shadow: 0 0 11px rgba(47, 189, 117, .32); }
  60% { border-color: #3d8fff; box-shadow: 0 0 11px rgba(61, 143, 255, .34); }
  80% { border-color: #a14eff; box-shadow: 0 0 11px rgba(161, 78, 255, .34); }
  100% { border-color: #ff5263; box-shadow: 0 0 10px rgba(255, 82, 99, .32); background-position: 100% 50%; }
}

.reverse-mode #answer-panel {
  border-color: #7c4dff;
  box-shadow: 0 12px 38px rgba(124, 77, 255, .24);
}
.reverse-mode #answer-input:focus {
  border-color: #7c4dff;
  box-shadow: 0 0 0 4px rgba(124, 77, 255, .15);
}

.game-duration-setting {
  display: flex; flex-direction: column; gap: 7px;
  margin: -2px 0 16px; padding: 11px;
  border: 1.5px solid #e1e4e9; border-radius: 14px;
  background: #f8f9fb;
}
.game-duration-setting.hidden { display: none; }
.game-duration-label { font-size: 12px; font-weight: 800; color: var(--ink-soft); }
.game-duration-options { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.game-duration-btn {
  border: 2px solid #d8dce3; border-radius: 10px; padding: 7px 3px;
  background: #fff; color: var(--ink-soft); cursor: pointer;
  font: inherit; font-size: 12.5px; font-weight: 800;
  transition: all .15s var(--ease);
}
.game-duration-btn:hover { border-color: #aab2bf; }
.game-duration-btn.active { background: var(--line-blue); border-color: var(--line-blue); color: #fff; }
.game-duration-btn:focus-visible { outline: 3px solid rgba(0, 82, 164, .35); outline-offset: 2px; }
.game-duration-setting small { font-size: 10.5px; color: var(--ink-soft); }

.custom-lines {
  display: none;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 6px; margin-bottom: 16px;
  max-height: 200px; overflow-y: auto;
  text-align: left;
  border: 1.5px dashed #d4d7de; border-radius: 14px; padding: 10px;
}
.custom-lines.show { display: grid; animation: rise .35s var(--ease); }
.line-check {
  display: flex; align-items: center; gap: 7px;
  font-size: 13.5px; font-weight: 600;
  padding: 5px 6px; border-radius: 10px; cursor: pointer;
}
.line-check:hover { background: #f3f4f7; }
.line-check input { accent-color: var(--line-blue); width: 16px; height: 16px; }

.primary-btn {
  font: inherit; font-size: 19px; font-weight: 800;
  width: 100%;
  background: var(--line-blue); color: #fff;
  border: none; border-radius: 16px;
  padding: 16px; cursor: pointer;
  box-shadow: 0 8px 20px rgba(0, 82, 164, .3);
  transition: transform .2s var(--ease), box-shadow .2s, background .2s;
}
.primary-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(0, 82, 164, .38);
}
.primary-btn:active:not(:disabled) { transform: translateY(0); }
.primary-btn:disabled { background: #b9bec9; box-shadow: none; cursor: default; }

.ghost-btn {
  font: inherit; font-size: 15px; font-weight: 700;
  background: none; border: none; color: var(--ink-soft);
  margin-top: 12px; cursor: pointer; text-decoration: underline;
  text-underline-offset: 3px;
}
.ghost-btn:hover { color: var(--ink); }

/* 공부 모드 버튼 (홈 화면) */
.study-btn {
  font: inherit; font-size: 16px; font-weight: 800;
  width: 100%; margin-top: 10px;
  background: #fff; color: var(--line-green);
  border: 2px solid var(--line-green); border-radius: 16px;
  padding: 13px; cursor: pointer;
  transition: transform .2s var(--ease), background .2s;
}
.study-btn:hover { transform: translateY(-2px); background: rgba(0,168,77,.07); }
.study-btn:active { transform: translateY(0); }

.rule-note { margin-top: 16px; font-size: 12.5px; color: var(--ink-soft); }

/* ---------------- 엔딩 ---------------- */
.end-label {
  font-size: 14px; font-weight: 700; color: var(--ink-soft);
  letter-spacing: .14em;
}
.end-score {
  font-size: clamp(72px, 16vw, 104px);
  font-weight: 900; line-height: 1.05;
  font-variant-numeric: tabular-nums;
  color: var(--line-blue);
}
.end-score small { font-size: .3em; color: var(--ink); margin-left: 6px; font-weight: 800; }
.end-message { font-size: 17px; font-weight: 600; margin: 8px 0 26px; }

.share-row {
  display: flex; flex-wrap: wrap; gap: 8px; justify-content: center;
  margin-top: 22px; padding-top: 20px;
  border-top: 1.5px dashed #d4d7de;
}
.share-btn {
  font: inherit; font-size: 13.5px; font-weight: 700;
  background: #f3f4f7; color: var(--ink);
  border: 1.5px solid transparent; border-radius: 999px;
  padding: 9px 15px; cursor: pointer;
  transition: border-color .15s, background .15s, transform .15s var(--ease);
}
.share-btn:hover { background: #fff; border-color: var(--ink); transform: translateY(-1px); }

/* ---------------- 공부 모드 바 ---------------- */
.study-bar {
  position: fixed; top: 0; left: 0; right: 0;
  display: none; align-items: center; gap: 12px;
  padding: max(12px, env(safe-area-inset-top)) 16px 12px;
  background: linear-gradient(to bottom, rgba(255,255,255,.96), rgba(255,255,255,.7) 80%, rgba(255,255,255,0));
  z-index: 35;
}
.studying .study-bar { display: flex; }
.study-exit {
  font: inherit; font-weight: 800; font-size: 15px;
  background: var(--paper); color: var(--ink);
  border: 2px solid var(--ink); border-radius: 999px;
  padding: 9px 16px; cursor: pointer; box-shadow: var(--shadow);
  flex: none;
}
.study-exit:hover { transform: translateY(-1px); }
.study-title { font-weight: 800; font-size: 16px; }
.study-tip { font-size: 12.5px; color: var(--ink-soft); margin-left: auto; }

/* 공부 모드에서는 게임용 UI 전부 숨김 */
.studying #hud,
.studying #answer-panel,
.studying #feedback { display: none; }

/* ---------------- 토스트 ---------------- */
.toast {
  position: fixed; bottom: 90px; left: 50%;
  transform: translate(-50%, 16px);
  background: var(--ink); color: #fff;
  font-size: 14px; font-weight: 600;
  padding: 11px 22px; border-radius: 999px;
  opacity: 0; pointer-events: none; z-index: 60;
  transition: opacity .35s var(--ease), transform .35s var(--ease);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------------- 모바일 ---------------- */
@media (max-width: 560px) {
  .timer { font-size: 28px; padding: 3px 16px; border-width: 2.5px; }
  .hint-btn { font-size: 12.5px; padding: 7px 11px; }
  .hint-pill { min-width: 20px; height: 20px; font-size: 12px; }
  .score-box { padding: 5px 12px; }
  .score-label { font-size: 10px; }
  #score { font-size: 20px; }
  #hud { padding: max(10px, env(safe-area-inset-top)) 12px 0; }

  .overlay { padding: 12px; align-items: flex-start; }
  .overlay-card { padding: 24px 18px; border-radius: 22px; }
  .title-plate { padding: 8px 22px; margin-bottom: 12px; }
  .tagline { font-size: 13.5px; margin-bottom: 18px; }
  .mode-select { gap: 7px; }
  .mode-card { padding: 11px 6px; border-radius: 13px; }
  .mode-card strong { font-size: 14px; }
  .mode-card small { display: none; }
  .play-mode-select { gap: 7px; margin-bottom: 14px; }
  .play-mode-card { padding: 11px 5px; border-radius: 13px; }
  .play-mode-card strong { font-size: 13px; }
  .play-mode-card small { font-size: 9.5px; line-height: 1.25; }
  .play-mode-new { top: -9px; right: -5px; font-size: 8px; padding: 2px 5px; }
  .game-duration-setting { padding: 9px; margin-bottom: 14px; }
  .game-duration-options { gap: 4px; }
  .game-duration-btn { padding: 7px 1px; font-size: 11.5px; }
  .custom-lines { grid-template-columns: repeat(2, 1fr); max-height: 168px; }
  .line-check { font-size: 12.5px; }
  .primary-btn { font-size: 17px; padding: 14px; }
  .study-btn { font-size: 15px; padding: 12px; }
  #answer-input { font-size: 16px; padding: 12px 14px; } /* 16px 미만이면 iOS가 확대함 */
  .submit-btn { font-size: 16px; padding: 0 20px; }
  #answer-panel { padding: 12px 13px; border-radius: 20px; width: calc(100% - 16px); }
  .question-text { font-size: 15px; }
  .suggestions { max-height: 132px; }

  .end-score { font-size: clamp(64px, 22vw, 90px); }
  .share-row { gap: 6px; }
  .share-btn { font-size: 12.5px; padding: 8px 12px; }

  .study-tip { display: none; }
  .study-title { font-size: 15px; }
}

/* 화면이 아주 낮을 때(가로 모바일 등) 오버레이가 스크롤되게 */
@media (max-height: 520px) {
  .overlay { align-items: flex-start; }
  .overlay-card { padding: 18px; }
  .title-plate { margin-bottom: 8px; }
  .tagline { margin-bottom: 12px; }
  .custom-lines { max-height: 120px; }
}

/* ---------------- 모션 최소화 ---------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}

/* ============================================================
   계정 / 로그인 / 랭킹 / 마이페이지 (Supabase 연동 UI)
   ============================================================ */

/* 우측 상단 계정 영역 */
.account-area {
  position: fixed; top: max(14px, env(safe-area-inset-top)); right: 16px;
  z-index: 50; display: flex; align-items: center; gap: 8px;
}

/* 홈 좌측 상단 설정 */
.home-settings-area {
  position: fixed; top: max(14px, env(safe-area-inset-top)); left: 16px;
  z-index: 50;
}
.settings-open-btn {
  font: inherit; font-weight: 800; font-size: 14px;
  background: var(--paper); color: var(--ink);
  border: 2px solid var(--ink); border-radius: 999px;
  padding: 9px 16px; cursor: pointer; box-shadow: var(--shadow);
  transition: transform .15s var(--ease), background .15s;
}
.settings-open-btn:hover { transform: translateY(-1px); background: #f8f9fb; }
.in-game .home-settings-area,
.studying .home-settings-area,
.in-versus .home-settings-area,
.versus-mode .home-settings-area { display: none; }

/* 설정 모달 */
.settings-card { max-width: 400px; }
.settings-row {
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  background: #f7f8fa; border: 1.5px solid #e1e4e9; border-radius: 16px;
  padding: 16px;
}
.settings-copy { display: flex; flex-direction: column; gap: 4px; text-align: left; }
.settings-copy strong { font-size: 16px; }
.settings-copy small { color: var(--ink-soft); font-size: 12px; }
.settings-toggle {
  position: relative; flex: none; width: 78px; height: 38px;
  border: none; border-radius: 999px; padding: 4px 9px;
  background: #aeb4bf; color: #fff; cursor: pointer;
  transition: background .2s var(--ease);
}
.settings-toggle[aria-checked="true"] { background: var(--line-green); }
.settings-toggle-knob {
  position: absolute; left: 5px; top: 5px; width: 28px; height: 28px;
  border-radius: 50%; background: #fff; box-shadow: 0 2px 7px rgba(0,0,0,.2);
  transition: transform .2s var(--ease);
}
.settings-toggle[aria-checked="true"] .settings-toggle-knob { transform: translateX(40px); }
.settings-toggle-label { position: absolute; right: 11px; top: 10px; font-size: 12px; font-weight: 900; }
.settings-toggle[aria-checked="true"] .settings-toggle-label { right: auto; left: 12px; }
/* 게임/공부 중에는 방해되지 않게 숨김 */
.in-game .account-area, .studying .account-area { display: none; }

.account-btn.login {
  font: inherit; font-weight: 800; font-size: 14px;
  background: var(--paper); color: var(--ink);
  border: 2px solid var(--ink); border-radius: 999px;
  padding: 9px 16px; cursor: pointer; box-shadow: var(--shadow);
  transition: transform .15s var(--ease);
}
.account-btn.login:hover { transform: translateY(-1px); }

/* 닉네임 태그 (테마 노선 색 테두리) */
.nick-tag {
  font: inherit; font-weight: 800; font-size: 14px;
  display: inline-flex; align-items: center; gap: 7px;
  background: var(--paper); color: var(--ink);
  border: 2.5px solid var(--theme, #0052A4); border-radius: 999px;
  padding: 7px 14px; cursor: pointer; box-shadow: var(--shadow);
  transition: transform .15s var(--ease);
  max-width: 60vw;
}
.nick-tag:hover { transform: translateY(-1px); }
.nick-tag.static { cursor: default; box-shadow: none; padding: 4px 11px; font-size: 13px; }
.nick-tag .nick-dot {
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--theme, #0052A4); flex: none;
}
.nick-tag .nick-text { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* 홈/엔딩 하단 보조 버튼 묶음 */
.home-sub-btns { display: flex; gap: 8px; margin-top: 10px; }
.home-sub-btns > * { flex: 1; margin-top: 0 !important; }

/* 엔딩 화면: 랭킹(위) → 모드 변경(아래) 세로 배치 */
.end-stack-btns { display: flex; flex-direction: column; gap: 8px; margin-top: 10px; }
.end-stack-btns > * { width: 100%; margin-top: 0 !important; }

.rank-open-btn {
  font: inherit; font-size: 16px; font-weight: 800;
  background: #fff; color: #b8860b;
  border: 2px solid #e6b800; border-radius: 16px;
  padding: 13px; cursor: pointer;
  transition: transform .2s var(--ease), background .2s;
}
.rank-open-btn:hover { transform: translateY(-2px); background: #fffbea; }

/* ---------------- 모달 공통 ---------------- */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 60;
  display: none; align-items: center; justify-content: center;
  background: rgba(20, 25, 40, .5);
  padding: 16px; backdrop-filter: blur(2px);
}
.modal-backdrop.show { display: flex; animation: fade .2s var(--ease); }
@keyframes fade { from { opacity: 0; } }
body.modal-open { overflow: hidden; }

.modal-card {
  position: relative;
  background: var(--paper); border-radius: 24px;
  padding: 28px 24px; width: 100%; max-width: 440px;
  max-height: 88vh; overflow-y: auto;
  box-shadow: 0 24px 60px rgba(20, 25, 40, .3);
  animation: rise .3s var(--ease);
}
.modal-title { font-size: 22px; font-weight: 800; margin-bottom: 16px; text-align: center; }
.modal-x {
  position: absolute; top: 16px; right: 16px;
  width: 34px; height: 34px; border-radius: 50%;
  border: none; background: #f3f4f7; color: var(--ink-soft);
  font-size: 16px; cursor: pointer; line-height: 1;
}
.modal-x:hover { background: #e7e9ee; color: var(--ink); }
.modal-actions { display: flex; gap: 10px; align-items: center; justify-content: space-between; margin-top: 20px; }
.primary-btn.slim { padding: 11px 22px; font-size: 16px; width: auto; }

.field-label { display: block; font-size: 13px; font-weight: 700; color: var(--ink-soft); margin: 16px 0 7px; text-align: left; }
.field-input {
  width: 100%; font: inherit; font-size: 16px; font-weight: 600;
  padding: 12px 14px; border: 2px solid #d4d7de; border-radius: 12px; outline: none;
  transition: border-color .2s, box-shadow .2s;
}
.field-input:focus { border-color: var(--line-blue); box-shadow: 0 0 0 4px rgba(0, 82, 164, .14); }
.inline-field { display: flex; gap: 8px; }
.inline-field .field-input { flex: 1; }
.field-msg { font-size: 13px; font-weight: 600; margin-top: 6px; min-height: 18px; text-align: left; }
.field-msg.ok { color: var(--line-green); }
.field-msg.no { color: var(--danger); }
.muted { color: var(--ink-soft); font-size: 14px; text-align: center; padding: 16px 0; }

/* ---------------- 테마 노선 선택 그리드 ---------------- */
.theme-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 7px;
}
.theme-swatch {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  background: #fff; border: 2px solid #e7e9ee; border-radius: 12px;
  padding: 8px 4px; cursor: pointer; transition: transform .15s var(--ease), border-color .15s;
}
.theme-swatch:hover { transform: translateY(-2px); }
.theme-swatch.selected { border-color: var(--c); background: color-mix(in srgb, var(--c) 10%, #fff); }
.theme-badge {
  display: flex; align-items: center; justify-content: center;
  min-width: 26px; height: 26px; padding: 0 6px; border-radius: 999px;
  background: var(--c); color: var(--t); font-size: 11px; font-weight: 800;
}
.theme-name { font-size: 10.5px; font-weight: 700; color: var(--ink-soft); }
.theme-swatch.selected .theme-name { color: var(--ink); }

/* ---------------- 랭킹 ---------------- */
.rank-tabs { display: flex; gap: 8px; margin-bottom: 10px; }
.rank-variant-control {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  margin: 2px 0 12px; padding: 10px 12px;
  border: 1.5px solid #e2e5eb; border-radius: 14px;
  background: linear-gradient(120deg, rgba(255, 82, 99, .06), rgba(61, 143, 255, .07), rgba(161, 78, 255, .07));
}
.rank-variant-copy { min-width: 0; display: flex; flex-direction: column; gap: 2px; text-align: left; }
.rank-variant-copy strong { font-size: 13.5px; }
.rank-variant-copy small { font-size: 10.5px; color: var(--ink-soft); }
.rank-reverse-toggle {
  position: relative; flex: none; min-width: 76px; height: 36px; padding: 3px 9px 3px 36px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 2px solid #cfd4dd; border-radius: 999px; background: #edf0f4; color: #707786;
  font: inherit; font-size: 10px; font-weight: 900; cursor: pointer;
  transition: background .2s, border-color .2s, color .2s, box-shadow .2s;
}
.rank-reverse-knob {
  position: absolute; left: 4px; top: 3px;
  width: 26px; height: 26px; border-radius: 50%; background: #fff;
  box-shadow: 0 2px 7px rgba(0, 0, 0, .18); transition: transform .25s var(--ease);
}
.rank-reverse-toggle[aria-checked="true"] {
  padding: 3px 36px 3px 9px;
  color: #fff; border-color: #8b4dff;
  background: linear-gradient(110deg, #ff536b, #f6b735, #2fbd75, #3d8fff, #9a4fff);
  background-size: 240% 100%; box-shadow: 0 0 15px rgba(124, 77, 255, .28);
  animation: rank-reverse-rainbow 3s linear infinite;
}
.rank-reverse-toggle[aria-checked="true"] .rank-reverse-knob { transform: translateX(40px); }
@keyframes rank-reverse-rainbow {
  from { background-position: 0% 50%; }
  to { background-position: 100% 50%; }
}
.rank-tab {
  flex: 1; font: inherit; font-size: 14px; font-weight: 800;
  background: #f3f4f7; color: var(--ink-soft); border: none; border-radius: 12px;
  padding: 11px; cursor: pointer; transition: background .2s, color .2s;
}
.rank-tab.active { background: var(--line-blue); color: #fff; }
.rank-note { font-size: 12px; color: var(--ink-soft); text-align: center; margin-bottom: 14px; }
.rank-body { display: flex; flex-direction: column; gap: 6px; min-height: 120px; }
.rank-row {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border-radius: 12px; background: #f7f8fa;
}
.rank-row.mine { background: color-mix(in srgb, var(--line-blue) 12%, #fff); outline: 2px solid var(--line-blue); }
.rank-num { font-size: 20px; font-weight: 800; min-width: 54px; text-align: center; }
.rank-nick { flex: 1; display: flex; }
.rank-score { display: flex; flex-direction: column; align-items: flex-end; font-size: 18px; font-weight: 800; }
.rank-score strong { white-space: nowrap; }
.rank-score small { max-width: 190px; font-size: 10.5px; line-height: 1.2; text-align: right; font-weight: 700; color: var(--ink-soft); }
.rank-placement {
  min-width: 54px; display: flex; flex-direction: column; align-items: center;
  font-size: 20px; line-height: 1;
}
.rank-placement small {
  margin-top: 3px; padding: 3px 6px; border-radius: 999px;
  background: #e8ebf0; color: #4f5867; font-size: 8.5px; font-weight: 900; white-space: nowrap;
}
.rank-placement--first small { background: #fff0a6; color: #765500; }
.rank-placement--second small { background: #e7ebf0; color: #4c5562; }
.rank-placement--third small { background: #f5d4bd; color: #7c3f1c; }
.rank-placement--top-ten small { background: #dcecff; color: #0758a5; }
.rank-placement--top-percent small { background: #e7dcff; color: #6131a8; }

.score-achievement { display: inline-flex; align-items: center; gap: 4px; padding: 2px 7px; border-radius: 8px; }
.score-achievement--0 { background: #edf0f3; color: #5d6672; }
.score-achievement--10 { background: #e8f2ff; color: #286a9f; }
.score-achievement--20 { background: #e4f6f2; color: #197563; }
.score-achievement--30 { background: #e6f7e4; color: #34762c; }
.score-achievement--40 { background: #f1f8d9; color: #60751b; }
.score-achievement--50 { background: #fff4cf; color: #8a6500; }
.score-achievement--60 { background: #ffe7c8; color: #9a5100; }
.score-achievement--70 { background: #f5e5ff; color: #7132a1; }
.score-achievement--80 { background: #e7e2ff; color: #4934a5; }
.score-achievement--90 { background: #ffe1ec; color: #a52156; }
.score-tier-label { font-size: 9px; font-weight: 900; letter-spacing: .08em; color: var(--ink-soft); }

.rank-row.score-exceptional {
  position: relative; overflow: hidden;
  background: linear-gradient(115deg, #fff4c6, #e7f4ff 35%, #eee4ff 68%, #ffe5f1);
  box-shadow: 0 0 0 1px rgba(122, 83, 190, .2), 0 5px 18px rgba(92, 53, 168, .16);
}
.rank-row.score-exceptional::after {
  content: ""; position: absolute; inset: -60% -25%; pointer-events: none;
  background: linear-gradient(100deg, transparent 38%, rgba(255,255,255,.78) 49%, transparent 60%);
  animation: exceptional-shine 2.8s ease-in-out infinite;
}
.rank-row.score-exceptional > * { position: relative; z-index: 1; }
.score-achievement--95 {
  color: #fff; background: linear-gradient(100deg, #5746c8, #a33db2, #d44e7c);
  box-shadow: 0 0 12px rgba(126, 61, 183, .42);
}
@keyframes exceptional-shine {
  0%, 55% { transform: translateX(-70%); opacity: 0; }
  68% { opacity: 1; }
  100% { transform: translateX(70%); opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .rank-row.score-exceptional::after { animation: none; display: none; }
  .play-mode-card--reverse, .rank-reverse-toggle[aria-checked="true"] { animation: none; }
}

/* ---------------- 마이페이지 ---------------- */
.mypage-head { display: flex; align-items: center; gap: 10px; justify-content: center; margin-bottom: 6px; flex-wrap: wrap; }
.mypage-email { font-size: 12.5px; color: var(--ink-soft); }
.best-row { display: flex; gap: 8px; flex-wrap: wrap; }
.best-card {
  flex: 1; min-width: 90px; display: flex; flex-direction: column; align-items: center;
  background: #f7f8fa; border-radius: 14px; padding: 12px 8px;
}
.best-mode { font-size: 12px; font-weight: 700; color: var(--ink-soft); }
.best-score { font-size: 26px; font-weight: 800; line-height: 1.1; }
.best-unit { font-size: 11px; color: var(--ink-soft); }
.plays-list { display: flex; flex-direction: column; gap: 5px; max-height: 240px; overflow-y: auto; }
.play-row {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border-radius: 10px; background: #f7f8fa; font-size: 13.5px;
}
.play-score { font-weight: 800; min-width: 48px; }
.play-mode { flex: 1; color: var(--ink-soft); font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.play-date { color: var(--ink-soft); font-size: 12px; }

@media (max-width: 560px) {
  .modal-card { padding: 22px 16px; border-radius: 20px; }
  .modal-title { font-size: 19px; }
  .theme-grid { grid-template-columns: repeat(3, 1fr); }
  .nick-tag { font-size: 13px; }
  .account-area { right: 12px; }
}

/* ============================================================
   지역 선택 — 홈 화면 & 랭킹 모달
   ============================================================ */
.region-select {
  display: grid; grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px; margin-bottom: 12px;
}
.region-btn {
  min-width: 0; font: inherit; font-size: 15px; font-weight: 800;
  background: #f3f4f7; color: var(--ink-soft);
  border: 2px solid transparent; border-radius: 14px;
  padding: 11px; cursor: pointer;
  transition: background .2s, color .2s, border-color .2s, transform .15s var(--ease);
}
.region-btn:hover { transform: translateY(-1px); }
.region-btn.active {
  background: #fff; color: var(--line-blue);
  border-color: var(--line-blue);
}
.region-btn[data-region="nationwide"] { grid-column: 1 / -1; }

/* 랭킹 모달 지역 탭 */
.rank-region-tabs {
  display: grid; grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px; margin-bottom: 8px;
}
.rank-region-tab {
  min-width: 0; font: inherit; font-size: 14px; font-weight: 800;
  background: transparent; color: var(--ink-soft);
  border: 2px solid #e7e9ee; border-radius: 999px;
  padding: 8px; cursor: pointer; transition: all .2s;
}
.rank-region-tab.active {
  background: var(--ink); color: #fff; border-color: var(--ink);
}
.rank-region-tab[data-region="nationwide"] { grid-column: 1 / -1; }
.rank-duration-tabs {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 6px; margin: 8px 0;
}
.rank-duration-tab {
  border: 2px solid #dfe2e8; border-radius: 10px;
  padding: 7px 2px; background: #fff; color: var(--ink-soft);
  font: inherit; font-size: 12px; font-weight: 800; cursor: pointer;
  transition: all .15s var(--ease);
}
.rank-duration-tab:hover { border-color: #aab2bf; }
.rank-duration-tab.active { background: var(--line-blue); border-color: var(--line-blue); color: #fff; }
.rank-duration-tab:focus-visible { outline: 3px solid rgba(0, 82, 164, .35); outline-offset: 2px; }

/* ============================================================
   인앱 브라우저(카카오톡 등) 안내 배너 & 모달
   ============================================================ */
.inapp-banner {
  position: fixed; left: 0; right: 0; top: 0; z-index: 55;
  display: none; align-items: center; gap: 10px;
  background: #fff4d6; color: #6b4e00;
  border-bottom: 2px solid #f0c64b;
  padding: 10px 14px; font-size: 13.5px; font-weight: 700;
  box-shadow: 0 4px 14px rgba(0,0,0,.08);
}
.inapp-banner.show { display: flex; }
.inapp-banner-text { flex: 1; cursor: pointer; line-height: 1.4; }
.inapp-banner-text u { text-underline-offset: 2px; }
.inapp-banner-close {
  flex: none; width: 26px; height: 26px; border-radius: 50%;
  border: none; background: rgba(0,0,0,.08); color: #6b4e00;
  font-size: 13px; cursor: pointer; line-height: 1;
}
/* 배너가 떠 있을 때 게임/공부 중에는 숨김 */
.in-game .inapp-banner, .studying .inapp-banner { display: none !important; }

.inapp-msg { font-size: 14.5px; line-height: 1.6; text-align: center; color: var(--ink); margin-bottom: 14px; }
.inapp-steps {
  background: #f7f8fa; border-radius: 14px; padding: 14px 16px;
  font-size: 13.5px; line-height: 1.65; color: var(--ink); margin-bottom: 14px;
}
.inapp-steps p { margin: 0 0 10px; }
.inapp-steps p:last-child { margin-bottom: 0; }
.inapp-steps b { color: var(--line-blue); }

/* ============================================================
   대전 모드 (Versus)
   ============================================================ */
/* 홈의 대전 모드 버튼 */
.versus-btn {
  width: 100%; margin-top: 10px;
  font: inherit; font-size: 17px; font-weight: 800;
  color: #fff; cursor: pointer;
  background: linear-gradient(135deg, #7c3aed, #db2777);
  border: none; border-radius: 16px; padding: 14px;
  box-shadow: 0 8px 22px rgba(124, 58, 237, .35);
  transition: transform .2s var(--ease), box-shadow .2s;
}
.versus-btn:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(124, 58, 237, .45); }
.versus-btn:active { transform: translateY(0); }

/* 대전 화면 오버레이: show 클래스로 표시 */
.vs-screen { z-index: 45; background: rgba(255,255,255,.55); backdrop-filter: blur(3px); }
.vs-screen.show { opacity: 1; pointer-events: auto; }
.vs-screen.show .vs-card { transform: translateY(0); }
/* 대전 화면이 떠 있으면 홈 오버레이는 숨김 */
.in-versus #home-screen { opacity: 0 !important; pointer-events: none !important; }

.vs-card { width: min(460px, 100%); }
.vs-entry-card { width: min(620px, 100%); }
.title-plate.small h1 { font-size: 24px; }

/* 방 생성 및 공개방 탐색 */
.vs-create-box {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px;
  padding: 14px; background: #f7f8fa; border: 1.5px solid #e1e4e9; border-radius: 16px;
  text-align: left;
}
.vs-create-box > .field-label { grid-column: 1 / -1; margin: 0; }
.vs-create-box > .field-input { grid-column: 1 / -1; }
.vs-create-box > .primary-btn { grid-column: 1 / -1; padding: 13px; font-size: 17px; }
.vs-public-option {
  grid-column: 1 / -1; display: flex; align-items: center; gap: 9px;
  font-size: 13px; color: var(--ink); cursor: pointer;
}
.vs-public-option input { width: 18px; height: 18px; accent-color: var(--line-blue); }
.vs-public-option span { display: flex; align-items: baseline; gap: 7px; }
.vs-public-option small { color: var(--ink-soft); }
.vs-room-browser { margin-top: 14px; text-align: left; }
.vs-room-browser-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
.vs-room-browser-head .field-label { margin: 0 0 2px; }
.vs-room-browser-head small { color: var(--ink-soft); font-size: 11.5px; }
.vs-room-refresh {
  flex: none; border: 1.5px solid #d4d7de; border-radius: 999px; background: #fff;
  color: var(--ink-soft); padding: 7px 11px; font: inherit; font-size: 11.5px; font-weight: 800; cursor: pointer;
}
.vs-room-refresh:hover { color: var(--ink); border-color: #aab2bf; }
.vs-public-rooms {
  display: flex; flex-direction: column; gap: 7px; min-height: 72px; max-height: 236px;
  overflow-y: auto; padding: 2px; scrollbar-width: thin;
}
.vs-room-item {
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 5px 12px;
  align-items: center; border: 1.5px solid #e1e4e9; background: #fff; border-radius: 14px;
  padding: 11px 12px;
}
.vs-room-main { min-width: 0; }
.vs-room-title { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 14px; font-weight: 800; }
.vs-room-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 3px; color: var(--ink-soft); font-size: 11.5px; }
.vs-room-join {
  grid-column: 2; grid-row: 1 / span 2; border: none; border-radius: 11px;
  background: var(--line-blue); color: #fff; padding: 9px 13px;
  font: inherit; font-size: 12.5px; font-weight: 800; cursor: pointer;
}
.vs-room-join:disabled { background: #b9bec9; cursor: default; }

/* 만들기/입장 사이 구분선 */
.vs-divider {
  display: flex; align-items: center; text-align: center;
  color: var(--ink-soft); font-size: 13px; font-weight: 700;
  margin: 18px 0;
}
.vs-divider::before, .vs-divider::after {
  content: ""; flex: 1; height: 2px; background: #e7e9ee;
}
.vs-divider span { padding: 0 12px; }

.vs-code-field { letter-spacing: 3px; font-weight: 800; text-transform: uppercase; text-align: center; }

/* 대기실 */
.vs-lobby-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 7px; }
.vs-lobby-title-wrap { display: flex; align-items: center; gap: 6px; }
.vs-role-badge {
  font-size: 12px; font-weight: 800; color: #fff;
  background: var(--ink); border-radius: 999px; padding: 4px 12px;
}
.vs-visibility-badge {
  font-size: 11px; font-weight: 800; color: var(--line-blue);
  background: #eaf3ff; border-radius: 999px; padding: 4px 9px;
}
.vs-visibility-badge.private { color: #7c3aed; background: #f0eaff; }
.vs-lobby-title { margin: 2px 0 10px; font-size: 20px; line-height: 1.25; overflow-wrap: anywhere; }
.vs-myname { font-size: 13px; color: var(--ink-soft); }
.vs-myname b { color: var(--ink); }

.vs-code-label { font-size: 13px; font-weight: 700; color: var(--ink-soft); margin: 6px 0 4px; }
.vs-code-big {
  font-size: 40px; font-weight: 800; letter-spacing: 8px;
  color: var(--line-blue); background: #f3f6fc;
  border: 2px dashed #b9cdf0; border-radius: 16px;
  padding: 14px 10px; margin-bottom: 14px; text-align: center;
  user-select: all;
}

.vs-players {
  min-height: 70px; background: #f7f8fa; border-radius: 14px;
  padding: 12px; margin-bottom: 14px;
  display: flex; flex-direction: column; gap: 8px;
}
.vs-host-controls { margin-bottom: 12px; }

@media (max-width: 560px) {
  .vs-code-big { font-size: 32px; letter-spacing: 5px; }
  .title-plate.small h1 { font-size: 21px; }
}

/* 대전 대기실: 실시간 참가자 목록 */
.vs-players-count {
  font-size: 12.5px; font-weight: 800; color: var(--ink-soft);
  margin-bottom: 8px; text-align: center;
}
.vs-players-list { display: flex; flex-direction: column; gap: 8px; }
.vs-player {
  display: flex; align-items: center; gap: 8px;
  animation: vsPlayerIn .25s var(--ease);
}
@keyframes vsPlayerIn { from { opacity: 0; transform: translateY(-4px); } }
.vs-crown { font-size: 15px; flex: none; }
.vs-me {
  font-size: 10.5px; font-weight: 800; color: #fff;
  background: var(--line-blue); border-radius: 999px; padding: 2px 7px; flex: none;
}

/* 방장 위임 버튼 */
.vs-give-host {
  margin-left: auto; flex: none;
  font: inherit; font-size: 11.5px; font-weight: 800;
  color: #8a6d00; background: #fff6da;
  border: 1.5px solid #e9c84b; border-radius: 999px;
  padding: 4px 10px; cursor: pointer; white-space: nowrap;
  transition: background .15s, transform .15s var(--ease);
}
.vs-give-host:hover { background: #ffeeb0; transform: translateY(-1px); }
.vs-player { width: 100%; }

/* 대전 대기실 — 방장 게임 설정 */
.vs-setting-row { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.vs-setting-label { font-size: 13px; font-weight: 700; color: var(--ink-soft); width: 36px; flex: none; }
.vs-seg { display: flex; gap: 6px; flex: 1; flex-wrap: wrap; }
.vs-seg-btn {
  font: inherit; font-size: 13px; font-weight: 700;
  padding: 7px 12px; border-radius: 10px;
  border: 2px solid #e7e9ee; background: #fff; color: var(--ink-soft);
  cursor: pointer; transition: all .15s var(--ease); flex: 1; white-space: nowrap;
}
.vs-seg-btn:hover { border-color: #c8cfdb; }
.vs-seg-btn.active { background: var(--line-blue); border-color: var(--line-blue); color: #fff; }

.vs-custom-lines {
  display: none;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 6px; margin: 0 0 12px;
  max-height: 220px; overflow-y: auto;
  text-align: left;
  border: 1.5px dashed #d4d7de; border-radius: 14px; padding: 10px;
}
.vs-custom-lines.show { display: grid; }
.vs-custom-lines .line-check {
  display: flex; align-items: center; gap: 7px;
  font-size: 13px; font-weight: 600;
  padding: 5px 6px; border-radius: 10px; cursor: pointer;
}
.vs-custom-lines .line-check:hover { background: #f3f4f7; }
.vs-custom-lines .line-check input { accent-color: var(--line-blue); width: 16px; height: 16px; margin: 0; flex: none; }
.vs-custom-lines .line-chip { flex: none; }
.vs-custom-lines .line-check-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
@media (max-width: 560px) {
  .vs-custom-lines { grid-template-columns: repeat(2, 1fr); max-height: 180px; }
}

#vs-start-btn { margin-top: 6px; }

/* 대전방 공용 채팅 */
.vs-chat-toggle {
  position: fixed; right: 20px; bottom: max(20px, env(safe-area-inset-bottom)); z-index: 57;
  display: none; align-items: center; gap: 7px;
  border: none; border-radius: 999px; padding: 12px 17px;
  background: var(--ink); color: #fff; box-shadow: 0 10px 28px rgba(20,25,40,.25);
  font: inherit; font-size: 14px; font-weight: 800; cursor: pointer;
}
.vs-room-connected .vs-chat-toggle { display: inline-flex; }
.vs-chat-unread { min-width: 20px; height: 20px; padding: 0 5px; border-radius: 999px; background: var(--danger); font-size: 11px; line-height: 20px; }
.vs-chat-panel {
  position: fixed; right: 20px; bottom: max(20px, env(safe-area-inset-bottom)); z-index: 58;
  width: min(360px, calc(100% - 24px)); height: min(520px, calc(100dvh - 40px));
  display: flex; flex-direction: column; background: #fff; border: 2px solid var(--ink); border-radius: 20px;
  box-shadow: 0 20px 55px rgba(20,25,40,.28); opacity: 0; pointer-events: none;
  transform: translateY(15px) scale(.98); transition: opacity .2s, transform .2s var(--ease);
}
.vs-chat-panel.open { opacity: 1; pointer-events: auto; transform: none; }
.vs-chat-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 15px; border-bottom: 1.5px solid #e7e9ee; }
.vs-chat-head > div { min-width: 0; display: flex; flex-direction: column; text-align: left; }
.vs-chat-head small { color: var(--ink-soft); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.vs-chat-head button { border: none; background: #f3f4f7; color: var(--ink-soft); width: 30px; height: 30px; border-radius: 50%; cursor: pointer; }
.vs-chat-messages { flex: 1; overflow-y: auto; padding: 12px; display: flex; flex-direction: column; gap: 9px; background: #f7f8fa; }
.vs-chat-message { display: flex; flex-direction: column; align-items: flex-start; gap: 3px; max-width: 88%; }
.vs-chat-message.mine { align-self: flex-end; align-items: flex-end; }
.vs-chat-message-head { display: flex; align-items: center; gap: 6px; padding: 0 3px; font-size: 10.5px; color: var(--ink-soft); }
.vs-chat-bubble { padding: 9px 11px; border-radius: 4px 14px 14px 14px; background: #fff; border: 1px solid #e1e4e9; font-size: 13.5px; line-height: 1.4; text-align: left; overflow-wrap: anywhere; }
.vs-chat-message.mine .vs-chat-bubble { color: #fff; background: var(--line-blue); border-color: var(--line-blue); border-radius: 14px 4px 14px 14px; }
.vs-chat-report { border: none; background: none; color: var(--ink-soft); font: inherit; font-size: 10px; cursor: pointer; text-decoration: underline; }
.vs-chat-form { display: flex; gap: 7px; padding: 10px; border-top: 1.5px solid #e7e9ee; }
.vs-chat-form input { min-width: 0; flex: 1; border: 1.5px solid #d4d7de; border-radius: 11px; padding: 10px; font: inherit; font-size: 14px; outline: none; }
.vs-chat-form input:focus { border-color: var(--line-blue); }
.vs-chat-form button { border: none; border-radius: 11px; padding: 0 13px; background: var(--ink); color: #fff; font: inherit; font-size: 13px; font-weight: 800; cursor: pointer; }
.vs-chat-panel > .field-msg { min-height: 15px; margin: -5px 12px 3px; font-size: 11.5px; }
.vs-chat-policy { padding: 0 12px 10px; color: var(--ink-soft); font-size: 10.5px; line-height: 1.35; text-align: left; }

@media (max-width: 560px) {
  .vs-entry-card { padding-left: 14px; padding-right: 14px; }
  .vs-room-item { padding: 10px; }
  .vs-chat-toggle { right: 12px; bottom: max(12px, env(safe-area-inset-bottom)); }
  .vs-chat-panel { right: 8px; bottom: 8px; width: calc(100% - 16px); height: min(72dvh, 560px); }
}

/* 대전: 문제별 10초 타이머 배지 */
.vs-qtimer {
  display: none; flex: none; margin-left: auto;
  min-width: 30px; height: 30px; padding: 0 8px;
  align-items: center; justify-content: center;
  border-radius: 999px; font-weight: 800; font-size: 15px;
  background: #eef1f6; color: var(--ink); 
}
.vs-qtimer.show { display: inline-flex; }
.vs-qtimer.danger { background: #ffe2e2; color: #d12b2b; animation: vsPulse .6s ease-in-out infinite; }
@keyframes vsPulse { 0%,100%{ transform: scale(1);} 50%{ transform: scale(1.15);} }

/* ============ 대전: 상단 실시간 점수판 ============ */
.vs-scoreboard {
  position: fixed; top: 104px; left: 50%; transform: translateX(-50%);
  z-index: 30; display: none; gap: 8px; flex-wrap: wrap; justify-content: center;
  max-width: 96vw; padding: 0 8px;
}
.vs-scoreboard.show { display: flex; }
.vs-sb-item {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,.95); border: 1.5px solid #e7e9ee; border-radius: 999px;
  padding: 5px 11px; font-size: 13px; font-weight: 700; color: var(--ink);
  box-shadow: 0 3px 10px rgba(0,0,0,.08); transition: all .2s var(--ease);
  position: relative;
}
.vs-sb-item.me { border-color: var(--line-blue); }
.vs-sb-item.winner {
  animation: vsWin .5s var(--ease);   /* 초록 빛 없이 위아래 통통 효과만 */
}
@keyframes vsWin { 0%{ transform: translateY(0);} 35%{ transform: translateY(-7px);} 70%{ transform: translateY(0);} 85%{ transform: translateY(-3px);} 100%{ transform: translateY(0);} }
.vs-sb-dot { width: 9px; height: 9px; border-radius: 50%; flex: none; }
.vs-sb-name { max-width: 90px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.vs-sb-score { font-weight: 800; color: var(--line-blue); min-width: 14px; text-align: center; }
.vs-sb-typing {
  font-size: 10.5px; font-weight: 700; color: #fff; background: #9aa0a6;
  border-radius: 999px; padding: 1px 7px; margin-left: 2px;
  animation: vsTypingBlink 1s ease-in-out infinite;
}
@keyframes vsTypingBlink { 0%,100%{ opacity: 1;} 50%{ opacity: .45;} }

/* 게임 중에는 점수판 자리만큼 지도 위에 떠 있게(겹침 허용). 모바일은 더 작게 */
@media (max-width: 560px) {
  .vs-scoreboard { top: 92px; gap: 5px; }
  .vs-sb-item { padding: 4px 8px; font-size: 11.5px; }
  .vs-sb-name { max-width: 64px; }
}

/* ============ 대전: 최종 순위 화면 ============ */
.vs-result-list { display: flex; flex-direction: column; gap: 8px; margin: 8px 0 18px; }
.vs-result-item {
  display: flex; align-items: center; gap: 10px;
  background: #f7f8fa; border-radius: 14px; padding: 12px 14px;
  font-size: 15px; font-weight: 700; color: var(--ink);
}
.vs-result-item.first { background: linear-gradient(135deg,#fff7e0,#ffeebb); border: 2px solid #f0c64b; }
.vs-result-item.me { outline: 2px solid var(--line-blue); }
.vs-result-rank { font-size: 20px; width: 28px; text-align: center; flex: none; }
.vs-rank-num { font-size: 15px; font-weight: 800; color: var(--ink-soft); }
.vs-result-name { flex: 1; }
.vs-result-score { font-weight: 800; color: var(--line-blue); }
.vs-result-item.first .vs-result-score { color: #b8860b; }
.vs-result-actions { display: flex; flex-direction: column; gap: 8px; }

/* ============ 대전: 게임 시작 카운트다운 ============ */
.vs-countdown {
  position: fixed; inset: 0; z-index: 100;
  display: none; align-items: center; justify-content: center;
  background: rgba(255,255,255,.55); backdrop-filter: blur(2px);
}
.vs-countdown.show { display: flex; }
.vs-countdown span {
  font-size: 160px; font-weight: 900; line-height: 1;
  color: #e23b3b; text-shadow: 0 6px 24px rgba(226,59,59,.35);
  animation: vsCountPop .8s var(--ease) forwards;
}
@keyframes vsCountPop {
  0%   { transform: scale(.4); opacity: 0; }
  25%  { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(1); opacity: 1; }
}
.vs-countdown span.go { font-size: 110px; }
@media (max-width: 560px) {
  .vs-countdown span { font-size: 110px; }
  .vs-countdown span.go { font-size: 72px; }
}

/* ============================================================
   거꾸로 모드 — 0.5초 다크 테마
   홈에서 모드를 선택한 순간부터 게임/결과/대전방까지 같은 테마를 유지한다.
   ============================================================ */
body.reverse-mode {
  --ink: #f4f7fb;
  --ink-soft: #aeb8c8;
  --paper: #171a21;
  --line-blue: #4aa3ff;
  --line-green: #26d477;
  --shadow: 0 12px 34px rgba(0, 0, 0, .42);
  color-scheme: dark;
  background-color: #0b0e13;
}

/* 테마가 켜지고 꺼질 때 주요 면과 글자가 한 덩어리처럼 스르륵 바뀐다. */
.title-plate,
.title-dot,
.tagline,
.region-btn,
.mode-card,
.mode-card small,
.play-mode-card,
.play-mode-card small,
.game-duration-setting,
.game-duration-label,
.game-duration-btn,
.game-duration-setting small,
.custom-lines,
.line-check,
.primary-btn,
.study-btn,
.rank-open-btn,
.rule-note,
#answer-panel,
#answer-input,
.suggest-item,
.share-btn,
.study-bar,
.settings-open-btn,
.account-btn.login,
.nick-tag,
.modal-card,
.modal-x,
.field-input,
.settings-row,
.theme-swatch,
.rank-variant-control,
.rank-tab,
.rank-row,
.best-card,
.play-row,
.rank-region-tab,
.rank-duration-tab,
.vs-screen,
.vs-create-box,
.vs-room-refresh,
.vs-room-item,
.vs-code-big,
.vs-players,
.vs-seg-btn,
.vs-custom-lines,
.vs-chat-panel,
.vs-chat-head button,
.vs-chat-messages,
.vs-chat-bubble,
.vs-chat-form input,
.vs-sb-item,
.vs-result-item,
.vs-countdown {
  transition-duration: .5s;
  transition-timing-function: var(--ease);
}

.reverse-mode #map-container {
  background: radial-gradient(circle at 30% 20%, #181d27 0%, #080b10 100%);
}
.reverse-mode.at-home #map-container,
.reverse-mode.at-end #map-container {
  filter: blur(7px) saturate(.9) brightness(.58);
}
.reverse-mode .station-label { fill: #f7f9fc; stroke: #0a0d12; }
.reverse-mode .focus-ring { stroke: #f7f9fc; }

.reverse-mode .overlay,
.reverse-mode .vs-screen { background-color: rgba(4, 7, 11, .56); }
.reverse-mode .overlay-card {
  background-color: rgba(18, 22, 29, .96);
  border-color: #d9e0ec;
  box-shadow: 0 26px 70px rgba(0, 0, 0, .55), 0 0 35px rgba(124, 77, 255, .10);
}
.reverse-mode .title-plate {
  color: var(--ink); background: #181c25; border-color: var(--line-blue);
}
.reverse-mode .title-dot { background: #181c25; border-color: var(--line-blue); }

.reverse-mode .region-btn { background: #20252f; color: var(--ink-soft); }
.reverse-mode .region-btn.active {
  background: #11151c; color: var(--line-blue); border-color: var(--line-blue);
}
.reverse-mode .mode-card,
.reverse-mode .play-mode-card:not(.play-mode-card--reverse) {
  background: #151922; border-color: #414957; color: var(--ink);
}
.reverse-mode .mode-option input:checked + .mode-card {
  background: rgba(74, 163, 255, .16); border-color: var(--line-blue);
}
.reverse-mode .play-mode-option input:checked + .play-mode-card:not(.play-mode-card--reverse) {
  background: rgba(38, 212, 119, .14); border-color: var(--line-green);
}
.reverse-mode .play-mode-card--reverse { color: var(--ink); }

.reverse-mode .game-duration-setting,
.reverse-mode .custom-lines,
.reverse-mode .vs-custom-lines {
  background: #11151c; border-color: #3e4654;
}
.reverse-mode .game-duration-btn,
.reverse-mode .rank-duration-tab,
.reverse-mode .vs-seg-btn {
  background: #20252f; color: var(--ink-soft); border-color: #475060;
}
.reverse-mode .game-duration-btn.active,
.reverse-mode .rank-duration-tab.active,
.reverse-mode .vs-seg-btn.active {
  background: var(--line-blue); color: #fff; border-color: var(--line-blue);
}
.reverse-mode .line-check:hover,
.reverse-mode .vs-custom-lines .line-check:hover { background: #252b36; }

.reverse-mode #answer-panel {
  background: rgba(17, 21, 28, .94); color: var(--ink);
  border-color: #9d7bff; box-shadow: 0 14px 46px rgba(0, 0, 0, .5), 0 0 28px rgba(124, 77, 255, .24);
}
.reverse-mode #answer-input,
.reverse-mode .field-input,
.reverse-mode .vs-chat-form input {
  background: #0c1016; color: var(--ink); border-color: #4c5666;
}
.reverse-mode #answer-input::placeholder,
.reverse-mode .field-input::placeholder,
.reverse-mode .vs-chat-form input::placeholder { color: #7f8999; }
.reverse-mode .suggest-item,
.reverse-mode .share-btn {
  background: #222833; color: var(--ink); border-color: #3b4351;
}
.reverse-mode .suggest-item:hover,
.reverse-mode .suggest-item.active,
.reverse-mode .share-btn:hover { background: #2d3441; border-color: #e5eaf2; }
.reverse-mode .submit-btn { background: #7c4dff; color: #fff; }
.reverse-mode .submit-btn:hover { background: #936fff; }
.reverse-mode .study-bar {
  background: linear-gradient(to bottom, rgba(11,14,19,.97), rgba(11,14,19,.72) 80%, rgba(11,14,19,0));
}

.reverse-mode .study-btn { background: #171c23; }
.reverse-mode .study-btn:hover { background: rgba(38, 212, 119, .13); }
.reverse-mode .rank-open-btn { background: #191b20; color: #ffd257; }
.reverse-mode .rank-open-btn:hover { background: #29271d; }
.reverse-mode .settings-open-btn:hover,
.reverse-mode .modal-x,
.reverse-mode .modal-x:hover { background: #272d37; color: var(--ink); }
.reverse-mode .modal-backdrop { background: rgba(0, 0, 0, .68); }
.reverse-mode .settings-row,
.reverse-mode .best-card,
.reverse-mode .play-row,
.reverse-mode .rank-row,
.reverse-mode .theme-swatch {
  background: #20252e; border-color: #3d4654; color: var(--ink);
}
.reverse-mode .theme-swatch.selected {
  background: color-mix(in srgb, var(--c) 18%, #171a21);
}
.reverse-mode .rank-variant-control { border-color: #414a59; }
.reverse-mode .rank-tab { background: #252b35; }
.reverse-mode .rank-tab.active,
.reverse-mode .rank-region-tab.active { background: var(--line-blue); color: #fff; border-color: var(--line-blue); }
.reverse-mode .rank-region-tab { border-color: #414957; }
.reverse-mode .rank-row.mine { background: color-mix(in srgb, var(--line-blue) 18%, #20252e); }
.reverse-mode .rank-row.score-exceptional { color: #23262b; }
.reverse-mode .toast { background: #7c4dff; color: #fff; }

.reverse-mode .vs-create-box,
.reverse-mode .vs-room-item,
.reverse-mode .vs-code-big,
.reverse-mode .vs-players,
.reverse-mode .vs-chat-panel,
.reverse-mode .vs-chat-messages,
.reverse-mode .vs-chat-bubble,
.reverse-mode .vs-sb-item,
.reverse-mode .vs-result-item {
  background: #191e27; border-color: #3e4756; color: var(--ink);
}
.reverse-mode .vs-room-refresh,
.reverse-mode .vs-chat-head button { background: #252b35; border-color: #414a58; color: var(--ink-soft); }
.reverse-mode .vs-divider::before,
.reverse-mode .vs-divider::after { background: #3c4553; }
.reverse-mode .vs-code-big { color: var(--line-blue); }
.reverse-mode .vs-role-badge,
.reverse-mode .vs-chat-toggle,
.reverse-mode .vs-chat-form button { background: #7c4dff; color: #fff; }
.reverse-mode .vs-result-item.first {
  background: linear-gradient(135deg, #4d3d12, #765c18); color: #fff2bd; border-color: #d7ad36;
}
.reverse-mode .vs-countdown { background: rgba(4, 7, 11, .66); }

@media (prefers-reduced-motion: reduce) {
  body,
  #map-container,
  .overlay,
  .overlay-card,
  .station-label,
  .focus-ring,
  body * { transition-duration: .01ms !important; }
}