:root {
  --bg: #f5f7fa;
  --card: #ffffff;
  --border: #d8dee9;
  --text: #1f2937;
  --text-muted: #6b7280;
  --brand: #0d6b7a;
  --brand-hover: #0a525e;
  --accent: #f59e0b;
  --danger: #dc2626;
  --warning: #d97706;
  --success: #059669;
  --shadow: 0 1px 3px rgba(0,0,0,0.06);
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft JhengHei", "Noto Sans TC", sans-serif;
  background: var(--bg); color: var(--text); font-size: 14px;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.app-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px; background: var(--card); border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.app-header h1 { margin: 0; font-size: 18px; color: var(--brand); }
.app-header .user-box { color: var(--text-muted); font-size: 13px; }
.app-header .user-box button { margin-left: 8px; }

.tab-bar {
  display: flex; gap: 4px; padding: 0 20px;
  background: var(--card); border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.tab-bar button {
  background: transparent; border: none; padding: 12px 18px;
  cursor: pointer; font-size: 14px; color: var(--text-muted);
  border-bottom: 2px solid transparent;
}
.tab-bar button.active { color: var(--brand); border-bottom-color: var(--brand); font-weight: 600; }
.tab-bar button:hover { color: var(--brand); }

.tab-content { padding: 20px; }
.tab-page { display: none; }
.tab-page.active { display: block; }

.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 6px;
  padding: 16px; margin-bottom: 16px; box-shadow: var(--shadow);
}
.card h2 { margin: 0 0 12px 0; font-size: 16px; color: var(--brand); }

.toolbar {
  display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; align-items: center;
}

button, .btn {
  background: var(--brand); color: #fff; border: none; padding: 7px 14px;
  border-radius: 4px; cursor: pointer; font-size: 13px;
}
button:hover, .btn:hover { background: var(--brand-hover); }
button.ghost { background: transparent; color: var(--brand); border: 1px solid var(--brand); }
button.ghost:hover { background: var(--brand); color: #fff; }
button.danger { background: var(--danger); }
button.warning { background: var(--warning); }
button.success { background: var(--success); }
button[disabled] { opacity: 0.5; cursor: not-allowed; }

input, select, textarea {
  font-family: inherit; font-size: 13px; padding: 6px 10px;
  border: 1px solid var(--border); border-radius: 4px; background: #fff;
}
input:focus, select:focus, textarea:focus { outline: 1px solid var(--brand); border-color: var(--brand); }

table { border-collapse: collapse; width: 100%; }
th, td { padding: 8px 10px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; }
th { background: #f9fafb; font-weight: 600; color: var(--text-muted); }
tr:hover td { background: #fafbfc; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }

.badge {
  display: inline-block; padding: 2px 8px; border-radius: 10px;
  font-size: 11px; font-weight: 600;
}
.badge.draft { background: #e5e7eb; color: #374151; }
.badge.active { background: #d1fae5; color: #065f46; }
.badge.editing { background: #fef3c7; color: #92400e; }
.badge.submitted { background: #dbeafe; color: #1e40af; }
.badge.approved { background: #d1fae5; color: #065f46; }
.badge.closed { background: #e5e7eb; color: #374151; }

.kpi-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 16px; }
.kpi {
  background: var(--card); border: 1px solid var(--border); border-radius: 6px;
  padding: 14px; box-shadow: var(--shadow);
}
.kpi .lbl { color: var(--text-muted); font-size: 12px; }
.kpi .val { font-size: 20px; font-weight: 700; margin-top: 4px; font-variant-numeric: tabular-nums; }
.kpi.budget .val { color: var(--brand); }
.kpi.committed .val { color: #6366f1; }
.kpi.actual .val { color: var(--warning); }
.kpi.remaining .val { color: var(--success); }
.kpi.remaining.warning .val { color: var(--warning); }
.kpi.remaining.danger .val { color: var(--danger); }

.login-page {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; background: linear-gradient(135deg, #0d6b7a 0%, #1e3a5f 100%);
}
.login-box {
  background: #fff; padding: 32px; border-radius: 8px; width: 360px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}
.login-box h1 { margin: 0 0 8px 0; color: var(--brand); font-size: 22px; text-align: center; }
.login-box .sub { color: var(--text-muted); text-align: center; margin-bottom: 24px; font-size: 13px; }
.login-box .field { margin-bottom: 14px; }
.login-box label { display: block; font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.login-box input { width: 100%; padding: 9px 12px; font-size: 14px; }
.login-box button[type=submit] { width: 100%; padding: 10px; font-size: 14px; margin-top: 8px; }
.login-box .ver { text-align: center; color: var(--text-muted); font-size: 11px; margin-top: 20px; }
.error-msg { color: var(--danger); font-size: 13px; margin-top: 8px; text-align: center; }

.modal-mask {
  position: fixed; inset: 0; background: rgba(0,0,0,0.5);
  display: flex; align-items: center; justify-content: center; z-index: 100;
}
.modal {
  background: #fff; border-radius: 6px; padding: 20px; min-width: 420px; max-width: 92vw;
  max-height: 92vh; overflow: auto;
}
.modal h3 { margin: 0 0 14px 0; color: var(--brand); }
.modal .actions { margin-top: 16px; display: flex; gap: 8px; justify-content: flex-end; }

.form-row { display: grid; grid-template-columns: 110px 1fr; gap: 8px; margin-bottom: 10px; align-items: center; }
.form-row label { color: var(--text-muted); font-size: 12px; }

.muted { color: var(--text-muted); }
.right { text-align: right; }
.flex { display: flex; gap: 8px; align-items: center; }
.gap-12 { gap: 12px; }
.mt-12 { margin-top: 12px; }
.mb-12 { margin-bottom: 12px; }
.hidden { display: none !important; }