:root {
  --brand-red: #D7000F;
  --sidebar-bg: #1C1C1E;
  --sidebar-text: rgba(255,255,255,0.65);
  --sidebar-active: #FFFFFF;
  --sidebar-width: 220px;
  --content-bg: #F5F5F5;
  --card-bg: #FFFFFF;
  --text-primary: #1A1A1A;
  --text-secondary: #666666;
  --border: #E0E0E0;
  --font-body: 'Noto Sans TC', system-ui, sans-serif;
  --font-display: 'Noto Serif TC', serif;
}

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

body {
  font-family: var(--font-body);
  background: var(--content-bg);
  margin: 0;
}

#app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* Sidebar */
#sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.sidebar-logo {
  padding: 24px 20px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-logo img { width: 100px; display: block; }

.sidebar-dept {
  font-size: 11px;
  color: rgba(255,255,255,0.35);
  margin-top: 6px;
  letter-spacing: 0.02em;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 0;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  cursor: pointer;
  color: var(--sidebar-text);
  font-size: 14px;
  border-left: 3px solid transparent;
  transition: all 0.15s;
  user-select: none;
}

.nav-item:hover { color: var(--sidebar-active); background: rgba(255,255,255,0.05); }
.nav-item.active { color: var(--sidebar-active); border-left-color: var(--brand-red); background: rgba(255,255,255,0.06); }

.nav-section-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.25);
  padding: 16px 20px 6px;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.btn-login {
  width: 100%;
  padding: 8px;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.6);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-family: var(--font-body);
  transition: all 0.15s;
}
.btn-login:hover { border-color: rgba(255,255,255,0.4); color: #fff; }
.btn-logout { border-color: rgba(215,0,15,0.5); color: rgba(215,0,15,0.8); }
.btn-logout:hover { background: rgba(215,0,15,0.1); }

/* Content area */
#content {
  flex: 1;
  overflow-y: auto;
  padding: 32px;
}

/* Cards */
.card {
  background: var(--card-bg);
  border-radius: 8px;
  border: 1px solid var(--border);
  padding: 28px;
  margin-bottom: 20px;
}

.card-title {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--text-primary);
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

/* Form styles */
.section-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: 16px;
  margin-top: 24px;
}
.section-label:first-child { margin-top: 0; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-grid.single { grid-template-columns: 1fr; }

.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 13px; color: var(--text-secondary); }

.field input, .field select, .field textarea {
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: var(--font-body);
  color: var(--text-primary);
  background: #fff;
  transition: border-color 0.15s;
  outline: none;
}

.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--brand-red);
}

.field textarea { resize: vertical; min-height: 80px; }

.required-star { color: var(--brand-red); margin-left: 2px; }

/* Tabs */
.tab-row {
  display: flex;
  border-bottom: 2px solid var(--border);
  margin-bottom: 24px;
}

.tab {
  padding: 10px 20px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.15s;
}

.tab.active { color: var(--brand-red); border-bottom-color: var(--brand-red); font-weight: 500; }
.tab:hover:not(.active) { color: var(--text-primary); }

/* Buttons */
.btn-primary {
  background: var(--brand-red);
  color: #fff;
  border: none;
  padding: 11px 28px;
  border-radius: 6px;
  font-size: 15px;
  font-family: var(--font-body);
  cursor: pointer;
  transition: opacity 0.15s;
}
.btn-primary:hover { opacity: 0.88; }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-secondary {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  padding: 9px 20px;
  border-radius: 6px;
  font-size: 14px;
  font-family: var(--font-body);
  cursor: pointer;
}

.form-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding-top: 24px;
  margin-top: 8px;
  border-top: 1px solid var(--border);
}

/* Status badges */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}
.badge-pending { background: #F0F0F0; color: #666; }
.badge-in_progress { background: #EBF3FF; color: #1A73E8; }
.badge-done { background: #E8F5E9; color: #2E7D32; }

/* Table */
.records-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.records-table th {
  text-align: left; padding: 10px 12px;
  background: #F8F8F8; border-bottom: 1px solid var(--border);
  font-weight: 500; color: var(--text-secondary); font-size: 12px;
}
.records-table td { padding: 12px; border-bottom: 1px solid #F0F0F0; color: var(--text-primary); }
.records-table tr:last-child td { border-bottom: none; }
.records-table tr:hover td { background: #FAFAFA; }

/* Modal */
.modal-overlay {
  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: 10px; padding: 32px;
  width: 380px; box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}
.modal h2 { font-family: var(--font-display); font-size: 20px; margin-bottom: 20px; }
.modal-footer { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }

/* Success card */
.success-card {
  text-align: center; padding: 48px 24px;
}
.success-icon { font-size: 48px; margin-bottom: 16px; color: var(--brand-red); }
.success-title { font-family: var(--font-display); font-size: 22px; margin-bottom: 8px; }
.success-sub { color: var(--text-secondary); font-size: 14px; margin-bottom: 24px; }

/* Page header */
.page-header { margin-bottom: 24px; }
.page-header h1 { font-family: var(--font-display); font-size: 22px; color: var(--text-primary); }
.page-header p { color: var(--text-secondary); font-size: 13px; margin-top: 4px; }

/* Filter row */
.filter-row { display: flex; gap: 12px; margin-bottom: 20px; align-items: center; flex-wrap: wrap; }
.filter-row select, .filter-row input {
  padding: 7px 10px; border: 1px solid var(--border); border-radius: 6px;
  font-size: 13px; font-family: var(--font-body); color: var(--text-primary); outline: none;
}
.filter-row select:focus { border-color: var(--brand-red); }

/* Inline edit */
.inline-edit input, .inline-edit select {
  padding: 4px 8px; border: 1px solid var(--brand-red); border-radius: 4px;
  font-size: 13px; font-family: var(--font-body); width: 100%;
}
.btn-icon {
  background: none; border: none; cursor: pointer;
  color: var(--text-secondary); padding: 4px 8px; border-radius: 4px;
  font-size: 13px;
}
.btn-icon:hover { background: #F0F0F0; color: var(--text-primary); }
.btn-icon.danger:hover { background: #FFF0F0; color: var(--brand-red); }

.empty-state { text-align: center; padding: 40px; color: #999; font-size: 14px; }

@media (max-width: 768px) {
  #sidebar { display: none; }
  .form-grid { grid-template-columns: 1fr; }
}