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

:root {
  --bg-primary: #f5f6fa;
  --bg-secondary: #fff;
  --text-primary: #1a1a2e;
  --text-secondary: #555;
  --text-light: #707070;
  --border-color: #e2e5ef;
  --shadow: rgba(0,0,0,0.06);
  --primary-color: #4a4a4f;
  --primary-light: rgba(74,74,79,0.08);
  --primary-glow: rgba(74,74,79,0.2);
  --gradient-primary: linear-gradient(135deg, #6b6b70, #1c1c1e);
  --btn-gradient: linear-gradient(135deg, #6b6b70, #1c1c1e);
  --danger-color: #ef4444;
  --danger-light: rgba(239,68,68,0.08);
  --success-color: #10b981;
  --transition: cubic-bezier(0.4, 0, 0.2, 1);
  --wc-badge-fg: #047857;
  --wc-badge-bg: rgba(16,185,129,0.12);
  --wc-badge-border: rgba(16,185,129,0.45);
}

html.dark-mode,
body.dark-mode {
  --bg-primary: #18181b;
  --bg-secondary: #1f1f23;
  --btn-gradient: linear-gradient(135deg, #b0b0b5, #4a4a4f);
  --gradient-primary: linear-gradient(135deg, #b0b0b5, #4a4a4f);
  --text-primary: #eaeaf2;
  --text-secondary: #a0a0b8;
  --text-light: #8686ab;
  --border-color: #2e2e33;
  --shadow: rgba(0,0,0,0.35);
  --primary-color: #b0b0b5;
  --primary-light: rgba(176,176,181,0.12);
  --primary-glow: rgba(176,176,181,0.3);
  --danger-light: rgba(239,68,68,0.12);
  --success-color: #34d399;
  --danger-color: #f87171;
  --wc-badge-fg: #34d399;
  --wc-badge-bg: rgba(52,211,153,0.18);
  --wc-badge-border: rgba(52,211,153,0.5);
}

body {
  font-family: 'Inter', 'Segoe UI', -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

body :where(*) {
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.container {
  max-width: 700px;
  margin: 0 auto;
  padding: 36px 24px 60px;
  position: relative;
  z-index: 1;
}

/* ── Header (기존 도구 페이지와 동일한 구조) ── */
header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 32px;
  gap: 20px;
}

.header-left { flex: 1; }

.home-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.82rem;
  color: #4a4a4f;
  text-decoration: none;
  margin-bottom: 10px;
  font-weight: 600;
  padding: 4px 12px 4px 8px;
  border-radius: 20px;
  background: var(--primary-light);
  transition: all 0.25s var(--transition);
}

html.dark-mode .home-link,
body.dark-mode .home-link {
  color: #b0b0b5;
}

.home-link-icon { flex-shrink: 0; border-radius: 4px; }

.home-link:hover {
  background: var(--primary-glow);
  transform: translateX(-3px);
}

.header-left h1 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 6px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  font-size: 0.88rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.header-right { display: flex; align-items: center; gap: 10px; }

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1.5px solid var(--border-color);
  border-radius: 10px;
  background: var(--bg-primary);
  cursor: pointer;
  transition: all 0.25s var(--transition);
  color: var(--text-secondary);
}

.icon-btn:hover {
  border-color: var(--primary-color);
  background: var(--primary-light);
  color: var(--primary-color);
}

.theme-icon { width: 18px; height: 18px; }

.lang-select { position: relative; }

.lang-toggle {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 160px;
  padding: 6px;
  border: 1.5px solid var(--border-color);
  border-radius: 12px;
  background: var(--bg-secondary);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 8px 24px var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: all 0.2s var(--transition);
  z-index: 200;
}

.lang-select.open .lang-toggle {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 9px 10px;
  border-radius: 8px;
  transition: all 0.2s var(--transition);
}

.lang-option:hover { background: var(--primary-light); color: var(--primary-color); }
.lang-option.active { color: var(--primary-color); }
.lang-option .lang-check { opacity: 0; color: var(--primary-color); }
.lang-option.active .lang-check { opacity: 1; }

/* ── 컨트롤 (변환 모드 / 도시 추가) ── */
.wc-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: flex-end;
  margin-bottom: 16px;
}

.wc-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1 1 180px;
  min-width: 0;
}

.wc-field label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.wc-input,
.wc-select {
  width: 100%;
  padding: 10px 12px;
  border: 1.5px solid var(--border-color);
  border-radius: 10px;
  /* 16px 미만이면 iOS 사파리가 포커스 시 화면을 확대한다 */
  font-size: 16px;
  font-family: inherit;
  background: var(--bg-primary);
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.2s;
}

.wc-input:focus,
.wc-select:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.wc-btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.wc-btn-row .action-btn,
.wc-btn-row .btn-primary {
  flex: 1;
  min-width: 120px;
  text-align: center;
  justify-content: center;
}

/* ── 도시 검색 결과 ── */
.wc-search-wrap { position: relative; }

.wc-results {
  list-style: none;
  margin: 6px 0 0;
  padding: 4px;
  border: 1.5px solid var(--border-color);
  border-radius: 10px;
  background: var(--bg-secondary);
  max-height: 240px;
  overflow-y: auto;
  box-shadow: 0 8px 24px var(--shadow);
}

.wc-result-btn {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 9px 10px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.85rem;
  text-align: left;
  cursor: pointer;
}

.wc-result-btn:hover,
.wc-result-btn:focus-visible { background: var(--primary-light); color: var(--primary-color); }

.wc-result-zone {
  font-size: 0.72rem;
  color: var(--text-light);
  white-space: nowrap;
}

.wc-empty {
  padding: 10px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  text-align: center;
}

/* 검색 결과 안의 대륙 구분 소제목 */
.wc-result-group {
  padding: 8px 10px 4px;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--text-light);
}

.wc-grid-wrap { display: block; }

/* ── 대륙 그룹 ──
   로컬 시간대 카드(.wc-grid-local)는 그룹 밖 최상단에 고정, 나머지는
   대륙별 <details> 섹션으로 묶어 접었다 펼 수 있게 한다. */
.wc-grid-local { margin-bottom: 20px; }

.wc-continent { margin-bottom: 18px; }
.wc-continent:last-child { margin-bottom: 0; }

.wc-continent-header {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  list-style: none;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--text-secondary);
  padding: 6px 4px 10px;
  margin-bottom: 8px;
  border-bottom: 1.5px solid var(--border-color);
  user-select: none;
}

.wc-continent-header::-webkit-details-marker { display: none; }

.wc-continent-header::before {
  content: '▸';
  display: inline-block;
  font-size: 0.7rem;
  color: var(--primary-color);
  transition: transform 0.2s var(--transition);
}

.wc-continent[open] > .wc-continent-header::before { transform: rotate(90deg); }

.wc-continent-count {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-light);
  background: var(--primary-light);
  border-radius: 999px;
  padding: 1px 8px;
}

.wc-flag {
  /* 국기 이모지 렌더링이 시스템 폰트마다 살짝 달라, 도시명과의 세로 정렬만 보정 */
  display: inline-block;
}

/* ── 시계 카드 ── */
.wc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

.wc-card {
  position: relative;
  padding: 16px 14px;
  border-radius: 14px;
  border: 1.5px solid var(--border-color);
  background: var(--bg-secondary);
  box-shadow: 0 2px 8px var(--shadow);
  min-width: 0;
}

/* 로컬 시간대 카드는 기준점이라 눈에 띄게 둔다 */
.wc-card.local { border-color: var(--primary-color); }

.wc-city {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  /* 도시명이 길어도 카드를 늘리지 않는다 */
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding-right: 26px;
}

.wc-time {
  margin-top: 6px;
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

.wc-date {
  margin-top: 2px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.wc-meta {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.wc-offset {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1.5px solid var(--border-color);
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

/* 로컬 대비 하루가 밀리거나 당겨진 지역 표시 */
.wc-daydiff {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1.5px solid var(--wc-badge-border);
  background: var(--wc-badge-bg);
  color: var(--wc-badge-fg);
}

.wc-remove {
  position: absolute;
  top: 10px;
  right: 8px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-light);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  transition: all 0.2s var(--transition);
}

.wc-remove:hover { background: var(--danger-light); color: var(--danger-color); }

/* ── Input Panel ── */
.input-panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: 0 2px 8px var(--shadow);
}

.btn-primary {
  padding: 10px 24px;
  background: var(--btn-gradient);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 0.88rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.25s var(--transition);
  box-shadow: 0 3px 12px var(--primary-glow);
  white-space: nowrap;
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px var(--primary-glow); }
.btn-primary:active { transform: translateY(0) scale(0.97); }

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border: 1.5px solid var(--border-color);
  border-radius: 10px;
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.25s var(--transition);
}

.action-btn:hover {
  border-color: var(--primary-color);
  color: var(--primary-color);
  background: var(--primary-light);
}

/* ── 안내 배너 ──
   변환 모드 안내는 오류가 아니라 상태 안내라, 공유 컴포넌트인 빨간
   .warning-banner 대신 중립 톤을 쓴다 (의미도 맞고 대비도 확보된다). */
.wc-notice {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: 12px;
  border: 1.5px solid var(--border-color);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}

/* ── 경고 배너 ── */
.warning-banner {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: 12px;
  background: var(--danger-light);
  color: var(--danger-color);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}

/* ── Modal ── */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  animation: fadeBg 0.2s ease;
  padding: 20px;
}

@keyframes fadeBg { from { opacity: 0; } to { opacity: 1; } }

.modal-box {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-radius: 20px;
  padding: 28px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
  animation: modalIn 0.35s var(--transition);
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

.modal-box::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--gradient-primary);
}

@keyframes modalIn {
  from { transform: translateY(24px) scale(0.95); opacity: 0; }
  to   { transform: translateY(0) scale(1); opacity: 1; }
}

.modal-box h2 { margin-bottom: 18px; font-size: 1.3rem; font-weight: 700; letter-spacing: -0.5px; }

.shortcuts { display: flex; flex-direction: column; gap: 10px; margin-bottom: 20px; }

.shortcut-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  padding: 8px 12px;
  background: var(--bg-primary);
  border-radius: 10px;
}

.shortcut-item kbd {
  background: var(--gradient-primary);
  color: #fff;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 700;
  font-family: 'Inter', monospace;
  box-shadow: 0 2px 6px var(--primary-glow);
  letter-spacing: 0.3px;
}

.shortcut-item span { color: var(--text-secondary); font-weight: 500; }

.modal-close-btn {
  width: 100%;
  background: var(--btn-gradient);
  color: #fff;
  border: none;
  border-radius: 12px;
  padding: 12px;
  font-size: 0.92rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.25s;
  box-shadow: 0 3px 10px var(--primary-glow);
}

.modal-close-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 18px var(--primary-glow); }

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: 12px 24px;
  border-radius: 12px;
  font-size: 0.85rem;
  font-weight: 600;
  z-index: 200;
  box-shadow: 0 8px 30px rgba(0,0,0,0.15);
  border: 1px solid var(--border-color);
  animation: toastIn 0.35s var(--transition);
}

@keyframes toastIn {
  from { transform: translateX(-50%) translateY(16px); opacity: 0; }
  to   { transform: translateX(-50%) translateY(0); opacity: 1; }
}

/* ── Scrollbar / focus ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 6px; }
::selection { background: var(--primary-glow); }
*:focus-visible { outline: 2px solid var(--primary-color); outline-offset: 2px; }
html { overflow-x: hidden; }

/* ── Responsive ── */
@media (max-width: 600px) {
  .container { padding: 24px 16px 50px; }
  .header-left h1 { font-size: 1.5rem; }
  .lang-toggle { min-width: 140px; right: -4px; }
  .lang-option { padding: 8px 8px; font-size: 0.8rem; }
  .wc-btn-row { flex-direction: column; align-items: stretch; }
  .wc-controls { flex-direction: column; align-items: stretch; }
  .wc-field { flex: 1 1 auto; }
  /* 좁은 화면에서는 카드를 한 줄에 하나씩 — 220px 최소폭이면 320px 에서 잘린다 */
  .wc-grid { grid-template-columns: 1fr; }
  .wc-time { font-size: 1.5rem; }
}