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

:root {
  --sidebar-bg: #1a1f2e;
  --sidebar-text: #8892a4;
  --sidebar-active: #fff;
  --sidebar-hover: #252c3f;
  --sidebar-accent: #4f6ef7;
  --main-bg: #f5f7fa;
  --white: #ffffff;
  --text-primary: #1a1f2e;
  --text-secondary: #6b7280;
  --border: #e5e7eb;
  --primary: #4f6ef7;
  --primary-hover: #3d5de0;
  --danger: #ef4444;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--main-bg);
  color: var(--text-primary);
  height: 100vh;
  overflow: hidden;
}

.app {
  display: flex;
  height: 100vh;
}

/* ── Sidebar ── */
.sidebar {
  width: 220px;
  min-width: 220px;
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 20px;
  color: white;
  font-size: 18px;
  font-weight: 700;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.logo-icon { color: var(--sidebar-accent); }

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

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.15s;
  border-left: 3px solid transparent;
}

.nav-item:hover {
  background: var(--sidebar-hover);
  color: var(--sidebar-active);
}

.nav-item.active {
  background: var(--sidebar-hover);
  color: var(--sidebar-active);
  border-left-color: var(--sidebar-accent);
}

.nav-icon { font-size: 15px; width: 20px; text-align: center; }

/* ── Main ── */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.topbar {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}

.page-title { font-size: 20px; font-weight: 600; }

.topbar-actions { display: flex; align-items: center; gap: 12px; }

.search-input {
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  outline: none;
  width: 220px;
  background: var(--main-bg);
  transition: border-color 0.15s;
}
.search-input:focus { border-color: var(--primary); background: white; }

/* ── Buttons ── */
.btn-primary {
  padding: 8px 16px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-primary:hover { background: var(--primary-hover); }

.btn-secondary {
  padding: 8px 16px;
  background: white;
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-secondary:hover { background: var(--main-bg); }

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
  background: white;
  color: var(--danger);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
}
.btn-sm:hover { background: var(--danger); color: white; border-color: var(--danger); }

/* ── Content ── */
.content { flex: 1; overflow-y: auto; padding: 24px; }

/* ── Dashboard ── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

.stat-icon { font-size: 22px; margin-bottom: 10px; }
.stat-label { font-size: 13px; color: var(--text-secondary); margin-bottom: 6px; }
.stat-value { font-size: 30px; font-weight: 700; }

/* ── Table ── */
.table-wrap {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.table-wrap-title {
  padding: 14px 20px;
  font-size: 14px;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
}

table { width: 100%; border-collapse: collapse; font-size: 14px; }
thead { background: #f9fafb; }

th {
  text-align: left;
  padding: 10px 16px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
}

td { padding: 11px 16px; border-bottom: 1px solid var(--border); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: #f9fafb; }

.row-link { color: var(--primary); cursor: pointer; font-weight: 500; }
.row-link:hover { text-decoration: underline; }

/* ── Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
}

.badge-blue   { background: #dbeafe; color: #1d4ed8; }
.badge-green  { background: #d1fae5; color: #065f46; }
.badge-yellow { background: #fef3c7; color: #92400e; }
.badge-red    { background: #fee2e2; color: #991b1b; }
.badge-gray   { background: #f3f4f6; color: #374151; }
.badge-purple { background: #ede9fe; color: #5b21b6; }

/* ── Empty / Loading ── */
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-secondary); }
.empty-icon { font-size: 36px; margin-bottom: 12px; }
.empty-title { font-size: 16px; margin-bottom: 6px; font-weight: 500; }
.empty-sub { font-size: 14px; }
.loading { text-align: center; padding: 40px; color: var(--text-secondary); font-size: 14px; }

/* ── Detail view ── */
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 14px;
  margin-bottom: 20px;
}
.back-btn:hover { color: var(--primary); }

.detail-header {
  background: var(--white);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.detail-title { font-size: 22px; font-weight: 600; margin-bottom: 8px; }
.detail-meta { display: flex; gap: 12px; flex-wrap: wrap; color: var(--text-secondary); font-size: 13px; }
.detail-actions { display: flex; gap: 8px; flex-shrink: 0; }

.detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.detail-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

.detail-card-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.detail-field { margin-bottom: 14px; }
.detail-field-label { font-size: 12px; color: var(--text-secondary); margin-bottom: 3px; }
.detail-field-value { font-size: 14px; font-weight: 500; color: var(--text-primary); }

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.modal-overlay.open { display: flex; }

.modal {
  background: var(--white);
  border-radius: 12px;
  width: 560px;
  max-width: 95vw;
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}

.modal-header {
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.modal-title { font-size: 18px; font-weight: 600; }
.modal-close {
  background: none;
  border: none;
  font-size: 18px;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 4px 6px;
  border-radius: 4px;
  line-height: 1;
}
.modal-close:hover { background: var(--main-bg); color: var(--text-primary); }

.modal-body { padding: 20px 24px; overflow-y: auto; flex: 1; }
.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* ── Forms ── */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group.full { grid-column: 1 / -1; }
.form-label { font-size: 13px; font-weight: 500; color: var(--text-secondary); }

.form-input,
.form-select,
.form-textarea {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  outline: none;
  font-family: inherit;
  background: white;
  transition: border-color 0.15s;
  color: var(--text-primary);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,110,247,0.1);
}

.form-input.error { border-color: var(--danger); }
.form-textarea { resize: vertical; min-height: 80px; }