:root {
  --bg: #fafafa;
  --card-bg: #ffffff;
  --border: #e2e2e2;
  --text: #1a1a1a;
  --text-muted: #6b6b6b;
  --accent: #ea580c;
  --accent-grad-start: #f97316;
  --accent-grad-mid: #ea580c;
  --accent-grad-end: #0ea5e9;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 16px 60px;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Pretendard", "Apple SD Gothic Neo", Roboto, sans-serif;
  line-height: 1.55;
}

.lang-switch { max-width: 640px; margin: 20px auto 0; display: flex; justify-content: flex-end; gap: 6px; }
.lang-btn { border: 1px solid var(--border); background: var(--card-bg); color: var(--text-muted); border-radius: 999px; padding: 5px 14px; font-size: .8rem; cursor: pointer; }
.lang-btn.active { border-color: var(--accent); color: var(--accent); background: #fff7ed; font-weight: 600; }

.page-header { max-width: 640px; margin: 0 auto; padding: 20px 0; text-align: center; }
.page-header h1 { font-size: 1.6rem; margin: 0 0 8px; background: linear-gradient(90deg, var(--accent-grad-start), var(--accent-grad-mid), var(--accent-grad-end)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.subtitle { color: var(--text-muted); font-size: .95rem; margin: 0; }

main { max-width: 640px; margin: 0 auto; display: flex; flex-direction: column; gap: 18px; }

.card { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 22px; }
.card h2 { font-size: 1.05rem; margin: 0 0 14px; display: flex; align-items: center; gap: 10px; }
.step-num { display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 26px; border-radius: 50%; background: linear-gradient(135deg, var(--accent-grad-start), var(--accent-grad-mid)); color: #fff; font-size: .85rem; flex-shrink: 0; }

.field-group { margin-bottom: 14px; }
.field-group.grow { flex: 1; min-width: 140px; }
label.field { display: block; font-size: .85rem; color: var(--text-muted); margin-bottom: 6px; }

.row { display: flex; gap: 12px; flex-wrap: wrap; }

input[type="text"], input[type="number"], input[type="date"], input[type="password"], select {
  width: 100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: 10px; font-size: 1rem; font-family: inherit; background: #fff;
}
input:focus, select:focus { outline: none; border-color: var(--accent); }

.hint { color: var(--text-muted); font-size: .85rem; margin: 8px 0 0; }
.hint:empty { display: none; }
.error-text { color: #b91c1c; font-size: .85rem; margin: 8px 0 0; }
.error-text:empty { display: none; }
.copied-hint { color: var(--accent); font-weight: 600; }

.btn { padding: 12px 18px; border: none; border-radius: 10px; font-size: .95rem; font-weight: 600; cursor: pointer; background: linear-gradient(90deg, var(--accent-grad-start), var(--accent-grad-mid), var(--accent-grad-end)); color: #fff; }
.btn.secondary { background: var(--card-bg); border: 1px solid var(--border); color: var(--text); }
.btn.small { padding: 8px 12px; font-size: .82rem; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.tab-row { display: flex; gap: 8px; margin-bottom: 16px; border-bottom: 1px solid var(--border); }
.tab-btn { border: none; background: none; padding: 10px 4px; font-size: .9rem; font-weight: 600; color: var(--text-muted); cursor: pointer; border-bottom: 2px solid transparent; margin-right: 12px; }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

.member-input-row { display: flex; gap: 8px; }
.member-input-row input { flex: 1; }

.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.chip { display: inline-flex; align-items: center; gap: 6px; background: #fff7ed; border: 1px solid #fed7aa; color: #9a3412; border-radius: 999px; padding: 6px 12px; font-size: .85rem; }
.chip.selectable { background: #f6f6f7; border-color: var(--border); color: var(--text-muted); cursor: pointer; user-select: none; }
.chip.selectable.selected { background: #fff7ed; border-color: var(--accent); color: var(--accent); font-weight: 600; }
.chip .chip-remove { cursor: pointer; font-weight: 700; color: #9a3412; }

.trip-header-row { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; flex-wrap: wrap; }
.trip-header-row h2 { margin: 0; font-size: 1.15rem; }
.trip-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.who-am-i { margin: 10px 0 0; max-width: 220px; }
.who-am-i .field { font-size: .78rem; margin-bottom: 4px; }

.rate-row { display: flex; gap: 8px; }
.rate-row input { flex: 1; }
.converted-amount { font-size: 1.1rem; font-weight: 700; padding: 12px 0; color: var(--accent); }

.settlement-line { display: flex; align-items: center; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--border); font-size: .95rem; }
.settlement-line:last-child { border-bottom: none; }
.settlement-arrow { color: var(--accent); font-weight: 700; }
.settlement-empty { color: var(--text-muted); font-size: .9rem; text-align: center; padding: 12px 0; }

.expense-item { display: flex; justify-content: space-between; align-items: flex-start; padding: 12px 0; border-bottom: 1px solid var(--border); gap: 10px; }
.expense-item:last-child { border-bottom: none; }
.expense-main { flex: 1; min-width: 0; }
.expense-amount { font-weight: 700; }
.expense-sub { color: var(--text-muted); font-size: .82rem; margin-top: 2px; }
.expense-del { border: none; background: none; color: #b91c1c; cursor: pointer; font-size: .8rem; padding: 4px 6px; flex-shrink: 0; }
.expense-list-empty { color: var(--text-muted); font-size: .9rem; text-align: center; padding: 12px 0; }

.sub-h { font-size: .92rem; margin: 0 0 10px; color: var(--text-muted); }

.share-panel { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border); }

.badge-row { display: flex; flex-wrap: wrap; gap: 6px; margin: 6px 0 0; }
.badge { display: inline-block; background: #f6f6f7; border: 1px solid var(--border); border-radius: 6px; padding: 2px 8px; font-size: .78rem; color: var(--text-muted); }
.badge.provisional { background: #fef9c3; border-color: #fde047; color: #854d0e; }
.badge.settled { background: #dcfce7; border-color: #86efac; color: #166534; }

.summary-total { font-size: 1.3rem; font-weight: 700; color: var(--accent); margin: 0 0 4px; }
.summary-sub { color: var(--text-muted); font-size: .85rem; margin: 0 0 16px; }
.summary-section { margin-top: 14px; }
.summary-section h4 { margin: 0 0 8px; font-size: .88rem; color: var(--text-muted); }
.summary-line { display: flex; justify-content: space-between; padding: 6px 0; border-bottom: 1px solid var(--border); font-size: .9rem; }
.summary-line:last-child { border-bottom: none; }

details.cash-details { margin-top: 16px; border-top: 1px solid var(--border); padding-top: 12px; }
details.cash-details summary { cursor: pointer; font-weight: 600; font-size: .92rem; color: var(--text); padding: 4px 0; }
details.cash-details[open] summary { margin-bottom: 12px; }

.holding-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.holding-table th, .holding-table td { text-align: right; padding: 8px 6px; border-bottom: 1px solid var(--border); }
.holding-table th:first-child, .holding-table td:first-child { text-align: left; }
.holding-empty { color: var(--text-muted); font-size: .88rem; text-align: center; padding: 10px 0; }

.mini-list { margin-top: 10px; }
.mini-list-item { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 6px 0; border-bottom: 1px solid var(--border); font-size: .82rem; color: var(--text-muted); }
.mini-list-item:last-child { border-bottom: none; }
.mini-list-item > span:first-child { flex: 1; }
.mini-list-actions { display: flex; gap: 2px; flex-shrink: 0; }
.mini-list-item .mini-del { border: none; background: none; color: #b91c1c; cursor: pointer; font-size: .78rem; flex-shrink: 0; }
.mini-list-item .mini-edit { border: none; background: none; color: var(--accent); cursor: pointer; font-size: .78rem; flex-shrink: 0; }

.pm-badge { display: inline-block; font-size: .72rem; padding: 1px 7px; border-radius: 999px; background: #e0f2fe; color: #075985; margin-right: 6px; }
.pm-badge.cash { background: #fef3c7; color: #92400e; }
.pm-badge.wire { background: #ede9fe; color: #5b21b6; }
.pm-badge.cash_settlement { background: #fee2e2; color: #991b1b; }

.settle-inline { display: flex; gap: 6px; align-items: center; margin-top: 6px; }
.settle-inline input { width: 110px; padding: 6px 8px; font-size: .82rem; }
.expense-edit-btn { border: none; background: none; color: var(--accent); cursor: pointer; font-size: .8rem; padding: 4px 6px; flex-shrink: 0; }

.page-footer { max-width: 640px; margin: 30px auto 0; color: var(--text-muted); font-size: .78rem; text-align: center; line-height: 1.3; }
.legal-group { display: flex; flex-direction: column; gap: 2px; }
.page-footer .legal { margin: 0; }
.meta-group { margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 2px; }
.page-footer .contact { margin: 0; font-size: .78rem; }
.page-footer .contact a { color: var(--accent); text-decoration: none; }
.page-footer .contact a:hover { text-decoration: underline; }
.page-footer .copyright { margin: 0; font-size: .75rem; color: #a0a0a0; }