:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #eff6ff;
  --success: #16a34a;
  --success-light: #f0fdf4;
  --danger: #dc2626;
  --danger-light: #fef2f2;
  --warning: #d97706;
  --warning-light: #fffbeb;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-900: #0f172a;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
}

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

body {
  font-family: 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', -apple-system, sans-serif;
  background: var(--gray-50);
  color: var(--gray-900);
  line-height: 1.6;
  min-height: 100vh;
}

/* ── ナビゲーション ── */
.navbar {
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
  height: 56px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.navbar-brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
}

.navbar-nav {
  display: flex;
  gap: 4px;
  margin-left: auto;
  align-items: center;
}

.nav-link {
  padding: 6px 14px;
  border-radius: var(--radius);
  color: var(--gray-600);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}

.nav-link:hover,
.nav-link.active {
  background: var(--primary-light);
  color: var(--primary);
}

.nav-user {
  font-size: 14px;
  color: var(--gray-500);
  margin-left: 8px;
  padding-left: 16px;
  border-left: 1px solid var(--gray-200);
}

/* ── コンテナ ── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 20px;
}

/* ── カード ── */
.card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}

.card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 20px;
}

/* ── ボタン ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background 0.15s, transform 0.1s, box-shadow 0.15s;
  text-decoration: none;
  white-space: nowrap;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 1px 2px rgba(37,99,235,0.3);
}
.btn-primary:hover { background: var(--primary-dark); }

.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
  border: 1px solid var(--gray-200);
}
.btn-secondary:hover { background: var(--gray-200); }

.btn-danger {
  background: var(--danger);
  color: #fff;
}
.btn-danger:hover { background: #b91c1c; }

.btn-ghost {
  background: transparent;
  color: var(--gray-600);
  padding: 6px 12px;
}
.btn-ghost:hover {
  background: var(--gray-100);
  color: var(--gray-900);
}

.btn-sm {
  padding: 4px 12px;
  font-size: 13px;
}

.btn-block { width: 100%; }

/* ── フォーム ── */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--gray-900);
  background: #fff;
  transition: border-color 0.15s, box-shadow 0.15s;
  font-family: inherit;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}

select.form-control { cursor: pointer; }

/* ── バッジ ── */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
}

.badge-office { background: var(--primary-light); color: var(--primary); }
.badge-remote { background: var(--success-light); color: var(--success); }
.badge-other { background: var(--gray-100); color: var(--gray-600); }
.badge-admin { background: var(--warning-light); color: var(--warning); }

/* ── アラート ── */
.alert {
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  margin-bottom: 16px;
}

.alert-error {
  background: var(--danger-light);
  color: var(--danger);
  border: 1px solid #fecaca;
}

.alert-success {
  background: var(--success-light);
  color: var(--success);
  border: 1px solid #bbf7d0;
}

/* ── ログインページ ── */
.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #eff6ff 0%, #f0fdf4 100%);
  padding: 20px;
}

.login-card {
  background: #fff;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  padding: 40px;
  width: 100%;
  max-width: 400px;
}

.login-logo {
  text-align: center;
  margin-bottom: 28px;
}

.login-logo h1 {
  font-size: 24px;
  font-weight: 800;
  color: var(--primary);
}

.login-logo p {
  font-size: 13px;
  color: var(--gray-500);
  margin-top: 4px;
}

/* ── カレンダー ── */
.calendar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.calendar-header h2 {
  font-size: 20px;
  font-weight: 700;
}

.calendar-summary {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.summary-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 12px 20px;
}

.summary-item .label {
  font-size: 12px;
  color: var(--gray-500);
  font-weight: 500;
}

.summary-item .value {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.calendar-weekday {
  text-align: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--gray-500);
  padding: 8px 4px;
  text-transform: uppercase;
}

.calendar-weekday:first-child { color: var(--danger); }
.calendar-weekday:last-child { color: var(--primary); }

.calendar-day {
  min-height: 90px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 8px;
  background: #fff;
  cursor: pointer;
  transition: box-shadow 0.15s, border-color 0.15s;
  position: relative;
  overflow: hidden;
}

.calendar-day:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
  z-index: 1;
}

.calendar-day.other-month {
  background: var(--gray-50);
  opacity: 0.5;
  cursor: default;
}

.calendar-day.other-month:hover {
  box-shadow: none;
  border-color: var(--gray-200);
}

.calendar-day.today {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(37,99,235,0.2);
}

.calendar-day.weekend .day-num {
  color: var(--gray-400);
}

.calendar-day.sunday .day-num { color: var(--danger); }
.calendar-day.saturday .day-num { color: var(--primary); }

.calendar-day.has-record {
  background: var(--success-light);
  border-color: #86efac;
}

.calendar-day.has-record:hover {
  border-color: var(--success);
  box-shadow: 0 0 0 2px rgba(22,163,74,0.15);
}

.day-num {
  font-size: 14px;
  font-weight: 700;
  color: var(--gray-700);
  display: block;
  margin-bottom: 4px;
}

.day-record {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.day-time {
  font-size: 11px;
  font-weight: 600;
  color: var(--success);
}

.day-hours {
  font-size: 11px;
  color: var(--gray-500);
}

.day-location {
  font-size: 10px;
  margin-top: 2px;
}

/* ── モーダル ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
  backdrop-filter: blur(2px);
}

.modal-overlay.hidden { display: none; }

.modal {
  background: #fff;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 17px;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--gray-400);
  font-size: 20px;
  padding: 4px;
  border-radius: var(--radius);
  transition: color 0.15s, background 0.15s;
}

.modal-close:hover {
  color: var(--gray-700);
  background: var(--gray-100);
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--gray-200);
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.work-hours-display {
  background: var(--primary-light);
  border: 1px solid #bfdbfe;
  border-radius: var(--radius);
  padding: 12px 16px;
  text-align: center;
  margin-top: 4px;
  margin-bottom: 16px;
}

.work-hours-display .label {
  font-size: 12px;
  color: var(--gray-500);
}

.work-hours-display .value {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* ── テーブル ── */
.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th {
  background: var(--gray-50);
  padding: 10px 14px;
  text-align: left;
  font-size: 12px;
  font-weight: 700;
  color: var(--gray-500);
  border-bottom: 1px solid var(--gray-200);
  white-space: nowrap;
}

td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-700);
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--gray-50); }

/* ── プロフィールページ ── */
.profile-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

/* ── ページヘッダー ── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.page-title {
  font-size: 20px;
  font-weight: 700;
}

/* ── レスポンシブ ── */
@media (max-width: 640px) {
  .container { padding: 16px; }
  .card { padding: 16px; }
  .form-row { grid-template-columns: 1fr; }
  .profile-grid { grid-template-columns: 1fr; }
  .calendar-day { min-height: 60px; padding: 4px; }
  .day-num { font-size: 12px; }
  .day-time, .day-hours { display: none; }
  .calendar-summary { gap: 12px; }
  .summary-item { padding: 10px 14px; }
  .summary-item .value { font-size: 18px; }
  .navbar-inner { padding: 0 12px; }
  .login-card { padding: 24px; }
}