:root {
  --navy: #1f4e78;
  --navy-dark: #163a5a;
  --bg: #f4f6f9;
  --card-bg: #ffffff;
  --border: #e2e6ec;
  --text: #2b2f36;
  --muted: #8a93a1;
  --day: #fff2cc;
  --day-text: #8a6d00;
  --night: #d9d2e9;
  --night-text: #5b3a99;
  --off: #eeeeee;
  --off-text: #666666;
  --grant: #d9ead3;
  --grant-text: #2e7d32;
  --use: #f8d7da;
  --use-text: #b02a37;
  --today: #ffe599;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Malgun Gothic", "맑은 고딕", sans-serif;
  background: var(--bg);
  color: var(--text);
}

header {
  background: var(--navy);
  color: #fff;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
header h1 { margin: 0; font-size: 1.3rem; }
.header-actions { display: flex; gap: 8px; }

main { max-width: 1100px; margin: 0 auto; padding: 20px 16px 60px; }

.btn {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 8px;
  background: #fff;
  color: var(--navy);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
}
.btn-secondary { background: rgba(255,255,255,0.15); color: #fff; }
.btn-primary { background: var(--navy); color: #fff; }
.btn-nav { background: #fff; color: var(--navy); border: 1px solid var(--border); }
.btn-small { padding: 5px 10px; font-size: 0.8rem; background: var(--navy); color: #fff; }
.btn-danger { background: var(--use-text); color: #fff; }

/* 요약 카드 */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin: 20px 0 28px;
}
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
}
.card h3 { margin: 0 0 8px; color: var(--navy); }
.card .big { font-size: 2rem; font-weight: 700; margin: 4px 0; }
.card .unit { font-size: 1rem; font-weight: 400; color: var(--muted); margin-left: 4px; }
.card .muted { color: var(--muted); font-size: 0.85rem; margin: 4px 0 0; }

.tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}
.tag-주간 { background: var(--day); color: var(--day-text); }
.tag-야간 { background: var(--night); color: var(--night-text); }
.tag-비번 { background: var(--off); color: var(--off-text); }
.tag-cat-부여 { background: var(--grant); color: var(--grant-text); }
.tag-cat-사용 { background: var(--use); color: var(--use-text); }

/* 캘린더 */
.calendar-section, .log-section, .panel {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 20px;
  margin-bottom: 24px;
}
.cal-nav { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.cal-nav h2 { margin: 0; font-size: 1.1rem; }
.calendar-scroll, .table-scroll { overflow-x: auto; }
.calendar { width: 100%; border-collapse: collapse; min-width: 640px; }
.calendar th {
  padding: 6px 4px;
  color: var(--muted);
  font-size: 0.85rem;
  border-bottom: 2px solid var(--border);
}
.calendar th.sun { color: #c0392b; }
.calendar th.sat { color: #2c6fbb; }
.calendar td {
  border: 1px solid var(--border);
  vertical-align: top;
  padding: 4px;
  height: 78px;
  width: 14.28%;
}
.calendar td.out { background: #fafbfc; }
.calendar td.today { background: var(--today); }
.daynum { font-weight: 700; font-size: 0.85rem; margin-bottom: 2px; }
.shift { font-size: 0.68rem; border-radius: 5px; padding: 1px 4px; margin-bottom: 1px; }
.shift-주간 { background: var(--day); color: var(--day-text); }
.shift-야간 { background: var(--night); color: var(--night-text); }
.shift-비번 { background: var(--off); color: var(--off-text); }
.leave-badge { font-size: 0.65rem; border-radius: 5px; padding: 1px 4px; margin-top: 2px; font-weight: 600; }
.leave-부여 { background: var(--grant); color: var(--grant-text); }
.leave-사용 { background: var(--use); color: var(--use-text); }

/* 표 */
table.log, table.admin-table { width: 100%; border-collapse: collapse; min-width: 560px; }
table.log th, table.admin-table th {
  text-align: left; padding: 8px; font-size: 0.85rem; color: var(--muted);
  border-bottom: 2px solid var(--border);
}
table.log td, table.admin-table td {
  padding: 8px; border-bottom: 1px solid var(--border); font-size: 0.9rem; white-space: nowrap;
}
table.log td.wrap { white-space: normal; }
.muted { color: var(--muted); }

/* 폼 */
.entry-form, .settings-form { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.entry-form input, .entry-form select,
.settings-form input, .settings-form select {
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 0.9rem;
}
.settings-form label { display: flex; flex-direction: column; gap: 4px; font-size: 0.8rem; color: var(--muted); }
.settings-row { display: flex; align-items: center; gap: 8px; width: 100%; }
.settings-row input[type=text] { flex: 1; min-width: 0; }
.settings-row select { flex: 0 0 auto; }
.entry-form .btn-primary, .settings-form .btn-primary {
  flex: 1 0 100%;
  margin-top: 6px;
  padding: 12px 16px;
}
.hint { color: var(--muted); font-size: 0.82rem; margin: -6px 0 12px; }
.date-picker { position: relative; }
.date-picker-pop {
  position: absolute; top: 100%; left: 0; z-index: 20;
  background: var(--card-bg); border: 1px solid var(--border); border-radius: 8px;
  box-shadow: var(--shadow); padding: 10px; margin-top: 4px;
  width: 240px; max-width: calc(100vw - 40px);
}
.date-picker-pop .cal-nav { margin-bottom: 8px; }
#dp-title { font-weight: 600; font-size: 0.9rem; }
.mini-cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 3px; }
.mini-cal-cell {
  aspect-ratio: 1; display: flex; align-items: center; justify-content: center;
  border-radius: 6px; font-size: 0.78rem; border: none; cursor: pointer; padding: 0;
}
.mini-cal-cell.out { visibility: hidden; cursor: default; }
.mini-cal-cell.today { box-shadow: 0 0 0 2px var(--navy) inset; }
.mini-cal-cell.selected { font-weight: 700; box-shadow: 0 0 0 2px var(--navy-dark) inset; }
.hour-quick { display: flex; flex-wrap: nowrap; gap: 6px; }
.hour-quick .btn-small { padding: 8px 10px; }
.hours-input { width: 64px; }
#new-hours { width: 64px; }
.reason-input { width: 140px; }
.actions { display: flex; gap: 6px; white-space: nowrap; }
.inline-form { display: inline; }

/* 로그인 화면 */
.login-body {
  display: flex; align-items: center; justify-content: center;
  height: 100vh; background: linear-gradient(135deg, var(--navy) 0%, var(--navy-dark) 100%);
}
.login-box {
  background: #fff; padding: 40px 32px; border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25); text-align: center; width: 280px;
}
.login-box h1 { margin: 0 0 8px; color: var(--navy); font-size: 1.4rem; }
.login-box p { color: var(--muted); margin: 0 0 20px; }
.pin-dots { display: flex; justify-content: center; gap: 14px; margin: 4px 0 20px; }
.dot {
  width: 16px; height: 16px; border-radius: 50%;
  border: 2px solid var(--border); background: #fff; transition: all .15s ease;
}
.dot.filled { background: var(--navy); border-color: var(--navy); }
.error { color: var(--use-text); margin: 0 0 14px; font-weight: 600; }

.keypad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 4px;
}
.key {
  padding: 16px 0;
  font-size: 1.3rem;
  font-weight: 700;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #f7f9fc;
  color: var(--navy);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}
.key:active { background: var(--navy); color: #fff; }
.key-alt { font-size: 0.85rem; color: var(--muted); background: #fff; }
.key:disabled { opacity: 0.4; cursor: not-allowed; }
.keypad-disabled .key:active { background: #f7f9fc; color: var(--navy); }

@media (max-width: 600px) {
  header { padding: 12px 14px; }
  main { padding: 14px 8px 50px; }
  .card .big { font-size: 1.6rem; }

  .calendar-scroll { overflow-x: visible; }
  .calendar { min-width: 0; table-layout: fixed; }
  .calendar td { padding: 2px; height: 56px; }
  .daynum { font-size: 0.7rem; }
  .shift { font-size: 0.62rem; padding: 1px 2px; border-radius: 4px; }
  .leave-badge { font-size: 0.55rem; padding: 1px 2px; }
}