/* ===== CSS Variables ===== */
:root {
  --color-bg: #f5f5f3;
  --color-surface: #fff;
  --color-border: #e4e3de;
  --color-border-light: #f0efec;
  --color-text: #1a1917;
  --color-text-secondary: #6b6960;
  --color-text-muted: #b0aea6;
  --color-primary: #1F4E79;
  --color-link: #2563eb;
  --color-success: #16a34a;
  --color-success-bg: #dcfce7;
  --color-warning: #f59e0b;
  --color-warning-bg: #fef9c3;
  --color-danger: #dc2626;
  --color-danger-bg: #fee2e2;
  --color-info-bg: #dbeafe;
  --font-family: -apple-system, BlinkMacSystemFont, 'Hiragino Sans', 'Yu Gothic', sans-serif;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
  font-size: 14px;
  line-height: 1.5;
}

/* ===== Typography ===== */
.page-title { font-size: 20px; font-weight: 700; color: var(--color-primary); margin-bottom: 6px; }
.page-desc { font-size: 13px; color: var(--color-text-secondary); margin-bottom: 20px; }
.section-label { font-size: 11px; font-weight: 600; color: var(--color-text-secondary); letter-spacing: .05em; margin-bottom: 10px; }

/* ===== Layout ===== */
.container { max-width: 1100px; margin: 0 auto; padding: 24px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.grid4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
@media (max-width: 768px) {
  .container { padding: 16px; }
  .grid2, .grid3, .grid4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .grid2, .grid3, .grid4 { grid-template-columns: 1fr; }
}

/* ===== Card ===== */
.card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; margin-bottom: 12px; }
.card-header { padding: 9px 14px; border-bottom: 1px solid var(--color-border); background: var(--color-border-light); display: flex; align-items: center; justify-content: space-between; }
.card-title { font-size: 13px; font-weight: 600; }
.card-link { font-size: 12px; color: var(--color-link); text-decoration: none; }
.card-body { padding: 14px 16px; }

/* ===== Metric ===== */
.metric { background: var(--color-border-light); border-radius: 10px; padding: 12px 14px; }
.metric.alert { background: var(--color-danger-bg); }
.metric-label { font-size: 11px; color: var(--color-text-secondary); margin-bottom: 4px; }
.metric-val { font-size: 22px; font-weight: 600; font-variant-numeric: tabular-nums; }
.metric-unit { font-size: 11px; font-weight: 400; color: var(--color-text-secondary); }
.metric.alert .metric-val { color: var(--color-danger); }
.metric-sub { font-size: 11px; color: var(--color-text-secondary); margin-top: 2px; }

/* ===== Badge ===== */
.badge { display: inline-block; font-size: 11px; padding: 2px 8px; border-radius: 8px; font-weight: 500; }
.b-approved { background: var(--color-success-bg); color: var(--color-success); }
.b-submitted { background: var(--color-info-bg); color: var(--color-link); }
.b-pending { background: var(--color-warning-bg); color: #854d0e; }
.b-old { background: var(--color-danger-bg); color: var(--color-danger); }
.b-night { background: var(--color-border-light); color: var(--color-text-secondary); border: 1px solid var(--color-border); }

/* ===== Table ===== */
.tbl { width: 100%; border-collapse: collapse; font-size: 13px; background: var(--color-surface); border-radius: 10px; overflow: hidden; border: 1px solid var(--color-border); }
.tbl th { background: var(--color-border-light); padding: 9px 12px; text-align: left; font-weight: 600; font-size: 11px; color: var(--color-text-secondary); border-bottom: 1px solid var(--color-border); }
.tbl td { padding: 9px 12px; border-bottom: 1px solid var(--color-border-light); }
.tbl tr:last-child td { border-bottom: none; }

/* ===== Attendance Table ===== */
.att-table { width: 100%; border-collapse: collapse; font-size: 13px; background: var(--color-surface); border-radius: 10px; overflow: hidden; border: 1px solid var(--color-border); }
.att-table th { background: var(--color-border-light); padding: 8px 10px; text-align: left; font-weight: 600; font-size: 11px; color: var(--color-text-secondary); border-bottom: 1px solid var(--color-border); }
.att-table td { padding: 6px 8px; border-bottom: 1px solid var(--color-border-light); vertical-align: middle; }
.att-table tr:last-child td { border-bottom: none; }
.att-table tr.weekend td { background: #f9f9f8; }
.att-table tr.missing td { background: var(--color-danger-bg); }

/* ===== Tags ===== */
.ttag { font-size: 10px; padding: 1px 4px; border-radius: 3px; margin-left: 2px; font-weight: 500; }
.tag-gps { background: var(--color-success-bg); color: var(--color-success); }
.tag-manual { background: var(--color-warning-bg); color: #854d0e; }
.tag-rounded { font-size: 10px; padding: 1px 4px; border-radius: 3px; margin-left: 2px; font-weight: 500; background: var(--color-border-light); color: var(--color-text-secondary); border: 1px solid var(--color-border); }

/* ===== Form ===== */
.form-row { margin-bottom: 12px; }
.form-label { font-size: 12px; color: var(--color-text-secondary); margin-bottom: 4px; display: block; }
.form-label .req { color: var(--color-danger); }
.form-input { width: 100%; height: 36px; border: 1px solid var(--color-border); border-radius: 6px; padding: 0 10px; font-size: 13px; background: var(--color-surface); }
.form-select { width: 100%; height: 36px; border: 1px solid var(--color-border); border-radius: 6px; padding: 0 8px; font-size: 13px; background: var(--color-surface); }
.form-hint { font-size: 11px; color: var(--color-text-secondary); margin-top: 3px; line-height: 1.5; }
.time-input { width: 120px; height: 38px; border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 0 10px; font-size: 15px; text-align: center; font-variant-numeric: tabular-nums; background: var(--color-surface); }
.time-input.missing { border-color: var(--color-danger); background: var(--color-danger-bg); }
.memo-input { width: 100%; height: 38px; border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 0 10px; font-size: 14px; background: var(--color-surface); }

/* ===== Buttons ===== */
.btn { height: 36px; padding: 0 16px; border-radius: var(--radius-md); font-size: 13px; font-weight: 600; cursor: pointer; border: none; display: inline-flex; align-items: center; justify-content: center; gap: 6px; }
.btn-primary { background: var(--color-text); color: #fff; }
.btn-secondary { background: transparent; border: 1px solid var(--color-border); color: var(--color-text-secondary); }
.btn-success { background: var(--color-success-bg); color: var(--color-success); border: 1px solid var(--color-success); }
.btn-danger { background: transparent; border: 1px solid var(--color-danger); color: var(--color-danger); }
.btn:disabled { background: var(--color-border-light); color: var(--color-text-muted); border: 1px solid var(--color-border); cursor: not-allowed; }
.btn-sm { height: 28px; padding: 0 10px; font-size: 12px; border-radius: 5px; }

/* ===== Top Nav (PC) ===== */
.top-nav { position: fixed; top: 0; left: 0; right: 0; height: 48px; background: var(--color-surface); border-bottom: 1px solid var(--color-border); display: flex; align-items: center; justify-content: space-between; padding: 0 20px; z-index: 100; }
.topnav-left { display: flex; align-items: center; gap: 4px; }
.topnav-right { display: flex; align-items: center; gap: 12px; }
.topnav-brand { font-size: 14px; font-weight: 700; color: var(--color-primary); margin-right: 12px; }
.topnav-link { font-size: 12px; color: var(--color-text-secondary); text-decoration: none; padding: 6px 10px; border-radius: var(--radius-sm); }
.topnav-link:hover { background: var(--color-border-light); }
.topnav-link.active { color: var(--color-text); font-weight: 600; background: var(--color-border-light); }
.topnav-user { font-size: 12px; color: var(--color-text-secondary); }
.topnav-sep { color: var(--color-border); font-size: 14px; margin: 0 2px; }
.topnav-group { font-size: 11px; font-weight: 700; color: var(--color-primary); margin-right: 2px; }

/* Back button (desktop top nav) */
.topnav-back-btn {
  height: 28px; padding: 0 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 12px; font-weight: 600;
  cursor: pointer; text-decoration: none;
  display: inline-flex; align-items: center;
  margin-right: 4px;
  transition: background .15s;
}
.topnav-back-btn:hover { background: var(--color-border-light); color: var(--color-text); }

/* Back button (mobile) */
.mobile-back-bar {
  position: sticky; top: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 6px 16px;
  z-index: 50;
}
.mobile-back-btn {
  background: none; border: none;
  color: var(--color-link); font-size: 13px;
  cursor: pointer; padding: 4px 0;
  display: inline-flex; align-items: center; gap: 4px;
}

/* ===== Bottom Nav (Mobile) ===== */
.bottom-nav { position: fixed; bottom: 0; left: 0; right: 0; height: 64px; background: var(--color-surface); border-top: 1px solid var(--color-border); display: flex; align-items: flex-end; justify-content: space-around; padding: 6px 8px 10px; z-index: 9000; -webkit-transform: translateZ(0); transform: translateZ(0); }
.bnav-item { text-align: center; flex: 1; text-decoration: none; color: var(--color-text-secondary); }
.bnav-item.active { color: var(--color-text); }
.bnav-icon { display: block; font-size: 18px; line-height: 1; }
.bnav-label { display: block; font-size: 10px; margin-top: 2px; }
.bnav-center { margin-top: -18px; }
.bnav-clock { display: flex; width: 52px; height: 52px; border-radius: 50%; background: var(--color-text); color: #fff; align-items: center; justify-content: center; margin: 0 auto; font-size: 22px; box-shadow: 0 -2px 8px rgba(0,0,0,.12); }

/* ===== Toast ===== */
.toast { position: fixed; top: 20px; right: 20px; padding: 12px 20px; border-radius: var(--radius-md); font-size: 13px; font-weight: 500; z-index: 9999; opacity: 0; transform: translateY(-10px); transition: opacity .3s, transform .3s; box-shadow: 0 4px 12px rgba(0,0,0,.1); }
.toast-show { opacity: 1; transform: translateY(0); }
.toast-success { background: var(--color-success-bg); color: var(--color-success); border: 1px solid var(--color-success); }
.toast-error { background: var(--color-danger-bg); color: var(--color-danger); border: 1px solid var(--color-danger); }
.toast-info { background: var(--color-info-bg); color: var(--color-link); border: 1px solid var(--color-link); }

/* ===== Loading Overlay ===== */
#loading-overlay { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(255,255,255,.6); z-index: 9998; align-items: center; justify-content: center; }
.loading-spinner { width: 32px; height: 32px; border: 3px solid var(--color-border); border-top-color: var(--color-text); border-radius: 50%; animation: spin .6s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Modal ===== */
.modal-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,.3); display: flex; align-items: center; justify-content: center; z-index: 200; }
.modal { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 14px; padding: 24px; max-width: 480px; width: 100%; }
.modal-title { font-size: 15px; font-weight: 700; margin-bottom: 16px; }
.modal-footer { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }

/* ===== Utility ===== */
.text-danger { color: var(--color-danger); }
.text-success { color: var(--color-success); }
.text-muted { color: var(--color-text-secondary); }
.text-center { text-align: center; }
.font-mono { font-variant-numeric: tabular-nums; }
.fw-600 { font-weight: 600; }
.mb-0 { margin-bottom: 0; }
.mb-8 { margin-bottom: 8px; }
.mb-12 { margin-bottom: 12px; }
.mb-16 { margin-bottom: 16px; }
.gap-8 { gap: 8px; }
.flex { display: flex; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-wrap { flex-wrap: wrap; }

/* ===== Responsive: Tablet ===== */
@media (max-width: 768px) {
  .top-nav { display: none; }
  body { padding-top: 0 !important; }
  .page-title { font-size: 17px; }
  .tbl, .att-table, .lb-table { font-size: 12px; }
  .tbl th, .att-table th { font-size: 10px; padding: 6px 8px; }
  .tbl td, .att-table td { padding: 6px 8px; }
  .modal { max-width: calc(100vw - 32px); margin: 16px; }
}

/* ===== Responsive: Phone ===== */
@media (max-width: 480px) {
  .container { padding: 12px; }
  .metric-val { font-size: 18px; }
  .metric { padding: 10px 12px; }
  .punch-card { flex-direction: column; gap: 10px; }
  .punch-divider { width: 100%; height: 1px; }
  .punch-time { font-size: 22px; }
  .time-input { width: 78px; font-size: 12px; }
  .att-table td.td-time, .att-table td.td-calc { font-size: 12px; }
  /* 勤怠テーブルのスクロール */
  .att-table { display: block; overflow-x: auto; white-space: nowrap; }
}