:root {
  --primary: #4C8F86;
  --primary-dark: #3A736B;
  --primary-light: #EEF4F1;
  --bg: #F5F8F6;
  --surface: #FFFFFF;
  --surface-2: #EEF4F1;
  --border: #D8E4DE;
  --text: #1A3D30;
  --text-muted: #8AAA9E;
  --danger: #E05C5C;
  --success: #2D8F6F;
  --radius: 12px;
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
input, select, textarea {
  font-family: inherit;
  font-size: 14px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  width: 100%;
  outline: none;
  transition: border-color 0.2s;
}
input:focus, select:focus, textarea:focus { border-color: var(--primary); }
textarea { resize: vertical; min-height: 80px; }
label { display: block; margin-bottom: 6px; font-size: 13px; color: var(--text-muted); font-weight: 600; }
.form-group { margin-bottom: 20px; }
button {
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.2s, opacity 0.2s;
}
button:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-dark); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover:not(:disabled) { background: #C94A4A; }
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-outline:hover:not(:disabled) { background: var(--primary-light); }
.btn-success { background: var(--success); color: white; }
.btn-success:hover:not(:disabled) { background: #237A5E; }
.btn-sm { padding: 6px 14px; font-size: 12px; }
.btn-icon {
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 4px 8px;
  font-size: 16px;
  cursor: pointer;
}
.btn-icon:hover { color: var(--text); }

/* ── Layout ── */
.sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: 260px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 10;
  border-radius: 0 24px 24px 0;
  box-shadow: var(--shadow);
}
.sidebar-brand {
  padding: 24px 20px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar-brand .brand-subtitle {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 4px;
}
.sidebar-brand h2 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}
.sidebar-brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  object-fit: cover;
  margin-bottom: 10px;
  border: 1px solid var(--border);
}
.sidebar-nav { flex: 1; padding: 12px 0; }
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  font-size: 14px;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}
.nav-item:hover { background: var(--primary-light); color: var(--text); }
.nav-item.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }
.sidebar-footer { padding: 12px 20px; border-top: 1px solid var(--border); }

.main {
  margin-left: 260px;
  min-height: 100vh;
}
.main-header {
  padding: 24px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.main-header h1 { font-size: 24px; }
.main-content { padding: 0 32px 32px; }

/* ── Cards ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}
.card-title { font-size: 16px; font-weight: 600; margin-bottom: 16px; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; }
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow);
}
.stat-value { font-size: 32px; font-weight: 700; color: var(--primary); }
.stat-label { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

/* ── Table ── */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--border); }
th { font-size: 12px; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }
.table-actions { white-space: nowrap; display: flex; gap: 8px; }
.table-message { text-align: center; color: var(--text-muted); padding: 40px !important; }

/* ── Modal ── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
}
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  width: 90%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
}
.modal h2 { font-size: 18px; margin-bottom: 20px; }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 20px; }

/* ── Login ── */
.login-page {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  background: var(--bg);
}
.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  width: 100%;
  max-width: 380px;
  box-shadow: var(--shadow);
  text-align: center;
}
.login-card img {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  object-fit: cover;
  margin-bottom: 12px;
}
.login-card h1 { font-size: 22px; margin-bottom: 4px; }
.login-card p { color: var(--text-muted); font-size: 14px; margin-bottom: 24px; }
.login-error { color: var(--danger); font-size: 13px; margin-bottom: 12px; display: none; }

/* ── Error / loading ── */
.loading-page, .error-page {
  min-height: 100vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 12px;
  text-align: center;
  padding: 20px;
}
.loading-page h2, .error-page h2 { font-size: 22px; }
.error-page p { color: var(--text-muted); }
.spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Toast ── */
.toast {
  position: fixed; bottom: 24px; right: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 14px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  z-index: 200;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: none;
  box-shadow: var(--shadow);
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.error { border-color: var(--danger); color: var(--danger); }
.toast.success { border-color: var(--success); color: var(--success); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .sidebar { display: none; }
  .main { margin-left: 0; }
  .main-header { padding: 16px; }
  .main-content { padding: 0 16px 16px; }
}