:root {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --primary: #364fc7;
  --primary-soft: #edf2ff;
  --danger: #c92a2a;
  --shadow: 0 10px 30px rgba(28, 39, 76, .08);
  font-family: Pretendard, "Noto Sans KR", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: var(--bg); padding-bottom: 84px; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
.hidden { display: none !important; }
.app-header { position: sticky; top: 0; z-index: 20; display: flex; justify-content: space-between; align-items: center; padding: 16px max(18px, env(safe-area-inset-left)); background: rgba(246,247,251,.94); backdrop-filter: blur(14px); border-bottom: 1px solid rgba(229,231,235,.8); }
h1, h2, h3, p { margin: 0; }
h1 { font-size: 1.35rem; letter-spacing: -.03em; }
h2 { font-size: 1.45rem; }
h3 { font-size: 1.05rem; }
.eyebrow { font-size: .67rem; letter-spacing: .14em; color: var(--primary); font-weight: 800; margin-bottom: 2px; }
.header-actions { display: flex; align-items: center; gap: 8px; }
.version { font-size: .75rem; color: var(--muted); background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 5px 9px; }
main { max-width: 1180px; margin: 0 auto; padding: 18px; }
.view { display: none; }
.view.active { display: block; }
.toolbar { display: flex; align-items: center; gap: 9px; margin-bottom: 12px; }
.date-toolbar { justify-content: center; }
.date-title { min-width: 180px; border: 0; background: transparent; font-size: 1.1rem; font-weight: 800; color: var(--text); padding: 8px; }
.icon-button { width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--line); background: #fff; font-size: 1.6rem; line-height: 1; color: var(--primary); }
.primary, .secondary, .danger, .file-button { border-radius: 12px; padding: 11px 15px; border: 1px solid transparent; font-weight: 750; text-align: center; }
.primary { background: var(--primary); color: white; }
.secondary, .file-button { background: white; color: var(--primary); border-color: #c7d2fe; }
.danger { background: #fff5f5; color: var(--danger); border-color: #ffc9c9; }
.compact { padding: 7px 10px; border-radius: 10px; font-size: .82rem; }
.summary-strip { display: flex; gap: 8px; overflow-x: auto; padding: 2px 0 14px; scrollbar-width: none; }
.summary-pill { flex: 0 0 auto; background: white; border: 1px solid var(--line); border-radius: 999px; padding: 8px 12px; font-size: .82rem; box-shadow: 0 3px 10px rgba(28,39,76,.04); }
.person-columns { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; align-items: start; }
.person-column { background: rgba(255,255,255,.72); border: 1px solid var(--line); border-radius: 18px; padding: 13px; min-height: 240px; }
.person-heading { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.person-name { display: flex; align-items: center; gap: 8px; font-weight: 850; }
.person-dot { width: 11px; height: 11px; border-radius: 50%; background: var(--primary); }
.count-badge { font-size: .72rem; color: var(--muted); background: white; border: 1px solid var(--line); border-radius: 999px; padding: 4px 7px; }
.event-list { display: grid; gap: 9px; }
.event-card { position: relative; overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 12px 12px 11px 16px; box-shadow: 0 5px 16px rgba(28,39,76,.05); }
.event-card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 5px; background: var(--event-color, #adb5bd); }
.event-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; }
.event-title { font-weight: 800; font-size: .94rem; }
.event-time { margin-top: 4px; color: #4b5563; font-size: .82rem; }
.event-note { margin-top: 5px; color: var(--muted); font-size: .75rem; }
.status-badge { flex: 0 0 auto; border-radius: 999px; padding: 4px 7px; font-size: .68rem; font-weight: 800; background: #f3f4f6; color: #4b5563; }
.status-absence { background: #fff4e6; color: #d9480f; }
.status-changed { background: #e7f5ff; color: #1971c2; }
.status-canceled { background: #fff5f5; color: #c92a2a; }
.status-vacation { background: #f3f0ff; color: #6741d9; }
.status-makeup { background: #ebfbee; color: #2b8a3e; }
.event-actions { display: flex; gap: 7px; margin-top: 9px; }
.event-actions button { border: 0; border-radius: 9px; padding: 6px 9px; font-size: .72rem; font-weight: 750; background: var(--primary-soft); color: var(--primary); }
.empty-state { text-align: center; color: var(--muted); font-size: .82rem; padding: 38px 10px; }
.section-heading { display: flex; justify-content: space-between; align-items: end; margin: 7px 0 14px; }
.section-heading.small { margin-top: 26px; }
.section-heading p:not(.eyebrow) { color: var(--muted); font-size: .8rem; margin-top: 4px; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 18px; padding: 16px; box-shadow: var(--shadow); }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 13px; }
.form-grid label, .field { display: grid; gap: 6px; font-size: .8rem; font-weight: 700; color: #374151; }
.form-grid input, .form-grid select, .form-grid textarea, .dialog-form input, .dialog-form select, .dialog-form textarea, .period-inputs input { width: 100%; border: 1px solid #d1d5db; border-radius: 11px; background: white; padding: 10px 11px; color: var(--text); outline: none; }
.form-grid input:focus, .form-grid select:focus, .form-grid textarea:focus, .dialog-form input:focus, .dialog-form select:focus, .dialog-form textarea:focus { border-color: #748ffc; box-shadow: 0 0 0 3px #edf2ff; }
.input-action-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px; align-items: stretch; }
.input-action-row select { min-width: 0; }
.inline-action { white-space: nowrap; padding-inline: 13px; }
.field-help { color: #e03131; font-size: .72rem; font-weight: 650; line-height: 1.35; }
.full { grid-column: 1 / -1; }
.form-actions { display: flex; justify-content: flex-end; }
.checkbox-line { display: flex !important; grid-template-columns: auto 1fr !important; align-items: center; gap: 8px !important; padding: 7px 0; }
.checkbox-line input { width: 18px !important; height: 18px; }
.weekday-picker { display: grid; grid-template-columns: repeat(7, 1fr); gap: 7px; }
.weekday-picker label { display: block; }
.weekday-picker input { position: absolute; opacity: 0; pointer-events: none; }
.weekday-picker span { display: grid; place-items: center; height: 39px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.weekday-picker input:checked + span { background: var(--primary); border-color: var(--primary); color: white; }
.stack-list { display: grid; gap: 10px; }
.list-card { display: flex; justify-content: space-between; gap: 12px; align-items: center; background: white; border: 1px solid var(--line); border-radius: 15px; padding: 13px; }
.list-card-main { min-width: 0; }
.list-card-title { display: flex; align-items: center; gap: 8px; font-weight: 800; }
.color-chip { width: 13px; height: 13px; border-radius: 4px; flex: 0 0 auto; }
.list-card-meta { margin-top: 4px; font-size: .76rem; color: var(--muted); line-height: 1.45; }
.list-actions { display: flex; gap: 6px; flex: 0 0 auto; }
.list-actions button { border: 0; background: #f3f4f6; color: #4b5563; border-radius: 9px; padding: 7px 9px; font-size: .72rem; }
.list-actions .delete { color: var(--danger); background: #fff5f5; }
.period-panel { display: grid; gap: 14px; }
.segmented { display: grid; grid-template-columns: repeat(3, 1fr); background: #f3f4f6; padding: 4px; border-radius: 12px; }
.segmented button { border: 0; border-radius: 9px; background: transparent; padding: 9px; font-weight: 750; color: var(--muted); }
.segmented button.active { background: white; color: var(--primary); box-shadow: 0 3px 10px rgba(28,39,76,.08); }
.period-inputs { display: grid; grid-template-columns: 1fr 1fr auto; gap: 10px; align-items: end; }
.period-inputs label { display: grid; gap: 5px; font-size: .76rem; font-weight: 750; }
.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 14px; }
.metric-card { background: white; border: 1px solid var(--line); border-radius: 15px; padding: 14px; }
.metric-label { color: var(--muted); font-size: .74rem; }
.metric-value { margin-top: 5px; font-size: 1.25rem; font-weight: 900; letter-spacing: -.03em; }
.summary-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.summary-card { background: white; border: 1px solid var(--line); border-radius: 16px; padding: 14px; }
.summary-card-header { display: flex; justify-content: space-between; gap: 8px; align-items: center; }
.summary-card h4 { margin: 0; font-size: .95rem; }
.summary-card .amount { font-size: .95rem; font-weight: 900; color: var(--primary); }
.summary-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; margin-top: 11px; }
.summary-stat { background: #f8f9fa; border-radius: 10px; padding: 8px; }
.summary-stat span { display: block; color: var(--muted); font-size: .65rem; }
.summary-stat strong { display: block; margin-top: 2px; font-size: .82rem; }
.month-row { display: flex; justify-content: space-between; gap: 8px; margin-top: 8px; padding-top: 8px; border-top: 1px dashed var(--line); font-size: .73rem; }
.data-actions { display: grid; grid-template-columns: repeat(4, 1fr); gap: 9px; }
.file-button { display: block; cursor: pointer; }
.file-button input { display: none; }
.bottom-nav { position: fixed; z-index: 30; bottom: 0; left: 0; right: 0; display: grid; grid-template-columns: repeat(4, 1fr); padding: 7px max(10px, env(safe-area-inset-left)) calc(7px + env(safe-area-inset-bottom)); background: rgba(255,255,255,.96); border-top: 1px solid var(--line); backdrop-filter: blur(16px); }
.bottom-nav button { border: 0; background: transparent; color: var(--muted); padding: 9px 5px; font-size: .76rem; font-weight: 800; border-radius: 11px; }
.bottom-nav button.active { color: var(--primary); background: var(--primary-soft); }
dialog { width: min(92vw, 460px); border: 0; border-radius: 20px; padding: 0; box-shadow: 0 24px 80px rgba(15,23,42,.25); }
dialog::backdrop { background: rgba(15,23,42,.45); backdrop-filter: blur(2px); }
.dialog-form { display: grid; gap: 13px; padding: 18px; }
.dialog-form label { display: grid; gap: 6px; font-size: .8rem; font-weight: 750; }
.dialog-heading { display: flex; justify-content: space-between; align-items: center; }
.close-dialog { border: 0; background: #f3f4f6; width: 34px; height: 34px; border-radius: 50%; font-size: 1.25rem; }
.dialog-target { background: #f8f9fa; border-radius: 11px; padding: 10px; color: #4b5563; font-size: .82rem; }
.two-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 4px; }
.toast { position: fixed; z-index: 100; left: 50%; bottom: 90px; transform: translate(-50%, 20px); background: #111827; color: white; border-radius: 999px; padding: 10px 15px; font-size: .82rem; opacity: 0; pointer-events: none; transition: .2s ease; white-space: nowrap; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }
@media (max-width: 820px) {
  .person-columns { grid-template-columns: 1fr; }
  .person-column { min-height: 0; }
  .summary-cards { grid-template-columns: 1fr; }
  .metric-grid { grid-template-columns: repeat(2, 1fr); }
  .data-actions { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 540px) {
  main { padding: 13px; }
  .app-header { padding: 13px 15px; }
  .form-grid { grid-template-columns: 1fr; }
  .full { grid-column: auto; }
  .weekday-picker { gap: 4px; }
  .weekday-picker span { height: 36px; font-size: .78rem; }
  .date-title { min-width: 145px; font-size: .98rem; }
  .period-inputs { grid-template-columns: 1fr 1fr; }
  .period-inputs button { grid-column: 1 / -1; }
  .list-card { align-items: flex-start; }
  .data-actions { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 390px) {
  .input-action-row { grid-template-columns: 1fr; }
  .inline-action { width: 100%; }
}

/* Calendar modes */
.calendar-mode { max-width: 390px; margin: 0 auto 10px; }
.calendar-view { display: none; }
.calendar-view.active { display: block; }
.info-callout { margin: 0 0 14px; padding: 12px 14px; border: 1px solid #c7d2fe; border-radius: 14px; background: var(--primary-soft); color: #374151; font-size: .82rem; line-height: 1.5; }
.field-help { color: var(--muted); }
.field-help.error-text { color: #e03131; }

#weekCalendar, .month-scroll { overflow-x: auto; padding-bottom: 8px; scrollbar-width: thin; }
.week-grid { min-width: 980px; display: grid; grid-template-columns: repeat(7, minmax(130px, 1fr)); gap: 9px; align-items: start; }
.week-day { min-height: 240px; background: rgba(255,255,255,.82); border: 1px solid var(--line); border-radius: 16px; padding: 9px; }
.week-day.is-today { border-color: #748ffc; box-shadow: 0 0 0 3px #edf2ff; }
.week-day-heading { width: 100%; display: flex; align-items: center; justify-content: space-between; border: 0; background: transparent; padding: 4px 3px 10px; color: var(--text); }
.week-day-heading strong { font-size: .86rem; }
.week-day-heading span { color: var(--muted); font-size: .7rem; }
.compact-event-list { display: grid; gap: 7px; }
.compact-event { position: relative; width: 100%; display: grid; gap: 3px; text-align: left; border: 1px solid var(--line); border-radius: 11px; background: white; padding: 8px 8px 8px 11px; overflow: hidden; }
.compact-event::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 4px; background: var(--event-color); }
.compact-time { color: var(--muted); font-size: .66rem; }
.compact-title { font-weight: 800; font-size: .76rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.compact-status { width: fit-content; font-size: .62rem; border-radius: 999px; padding: 2px 5px; background: #f3f4f6; color: #4b5563; }
.week-empty { padding: 26px 4px; text-align: center; color: var(--muted); font-size: .72rem; }

.month-grid { min-width: 760px; display: grid; grid-template-columns: repeat(7, minmax(100px, 1fr)); gap: 1px; overflow: hidden; border: 1px solid var(--line); border-radius: 16px; background: var(--line); }
.month-weekday { background: #f8f9fa; padding: 9px; text-align: center; font-size: .72rem; font-weight: 800; color: var(--muted); }
.month-day { min-height: 122px; display: flex; flex-direction: column; gap: 7px; border: 0; background: white; padding: 8px; text-align: left; color: var(--text); }
.month-day.outside { background: #f8f9fa; color: #adb5bd; }
.month-day.is-today { box-shadow: inset 0 0 0 2px #5c7cfa; }
.month-day-number { width: 26px; height: 26px; display: grid; place-items: center; border-radius: 50%; font-size: .78rem; font-weight: 800; }
.month-day.is-today .month-day-number { background: var(--primary); color: white; }
.month-events { display: grid; gap: 4px; min-width: 0; }
.month-event { display: flex; align-items: center; gap: 5px; min-width: 0; font-size: .66rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.month-event-dot { flex: 0 0 auto; width: 7px; height: 7px; border-radius: 50%; background: var(--event-color); }
.month-more { color: var(--muted); font-size: .65rem; font-weight: 750; }

@media (max-width: 540px) {
  .calendar-mode { max-width: none; }
  .date-toolbar { gap: 6px; }
  .date-title { min-width: 132px; font-size: .9rem; }
  .week-grid { min-width: 900px; }
  .month-grid { min-width: 700px; }
}

/* Mobile calendar readability */
@media (max-width: 540px) {
  #weekCalendar { overflow-x: visible; }
  .week-grid { min-width: 0; grid-template-columns: 1fr; }
  .week-day { min-height: 0; }
  .month-scroll { overflow-x: visible; }
  .month-grid { min-width: 0; grid-template-columns: repeat(7, minmax(0, 1fr)); }
  .month-weekday { padding: 7px 2px; font-size: .64rem; }
  .month-day { min-height: 86px; padding: 5px 3px; gap: 4px; }
  .month-day-number { width: 22px; height: 22px; font-size: .7rem; }
  .month-events { display: flex; flex-wrap: wrap; gap: 3px; align-content: flex-start; }
  .month-event { width: auto; }
  .month-event-title { display: none; }
  .month-event-dot { width: 6px; height: 6px; }
  .month-more { width: 100%; font-size: .58rem; }
}