/* ===== Reset & Variables ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --success: #34a853;
  --danger: #ea4335;
  --warning: #fbbc04;
  --purple: #9334e6;
  --teal: #00bcd4;
  --orange: #ff6d00;
  --g50: #f8f9fa; --g100: #f1f3f4; --g200: #e8eaed;
  --g300: #dadce0; --g500: #80868b; --g700: #5f6368; --g900: #202124;
  --sidebar-w: 250px;
  --navbar-h: 60px;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.08);
  --shadow-lg: 0 4px 12px rgba(0,0,0,.15);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--g900);
  background: var(--g50);
  line-height: 1.5;
  font-size: 14px;
}

/* ===== Layout ===== */
.app-layout { display: flex; min-height: 100vh; }
.main-area { flex: 1; display: flex; flex-direction: column; margin-left: var(--sidebar-w); transition: margin-left .3s; }
.main-content { padding: 24px; flex: 1; }

/* ===== Sidebar ===== */
.sidebar {
  position: fixed; top: 0; left: 0;
  width: var(--sidebar-w); height: 100vh;
  background: #1a1d23; color: #fff;
  z-index: 1000; overflow-y: auto;
  transition: transform .3s;
}
.sidebar-header { padding: 20px 24px; border-bottom: 1px solid rgba(255,255,255,.1); }
.sidebar-header h2 { font-size: 20px; font-weight: 700; }
.sidebar-nav { padding: 12px 0; }
.nav-link {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 24px; color: rgba(255,255,255,.7);
  text-decoration: none; font-size: 14px; font-weight: 500;
  transition: all .2s;
}
.nav-link:hover { background: rgba(255,255,255,.08); color: #fff; }
.nav-link.active { background: var(--primary); color: #fff; }
.nav-icon { font-size: 18px; width: 24px; text-align: center; }
.sidebar-overlay { display: none; }

/* ===== Navbar ===== */
.navbar {
  height: var(--navbar-h); background: #fff;
  border-bottom: 1px solid var(--g200);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; position: sticky; top: 0; z-index: 100;
}
.navbar-left { display: flex; align-items: center; gap: 16px; }
.menu-btn {
  display: none; background: none; border: none;
  font-size: 24px; cursor: pointer; padding: 4px 8px; color: var(--g700);
}
.navbar-title { font-size: 18px; font-weight: 600; }
.navbar-right { display: flex; align-items: center; gap: 16px; }
.user-info { color: var(--g700); font-size: 13px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 16px; border: 1px solid var(--g300); border-radius: var(--radius);
  font-size: 14px; font-weight: 500; cursor: pointer;
  background: #fff; color: var(--g700); transition: all .2s; white-space: nowrap;
  font-family: inherit;
}
.btn:hover { background: var(--g100); }
.btn:disabled { opacity: .6; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-danger:hover { background: #d33426; }
.btn-green { background: var(--success); color: #fff; border-color: var(--success); }
.btn-green:hover { background: #2d9249; }
.btn-outline { background: transparent; color: var(--g700); border-color: var(--g300); }
.btn-outline:hover { background: var(--g100); }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-block { width: 100%; }

/* ===== Cards ===== */
.card {
  background: #fff; border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 20px; margin-bottom: 20px;
}
.card h3 { font-size: 16px; font-weight: 600; margin-bottom: 16px; color: var(--g900); }
.form-card { border-left: 4px solid var(--primary); }

/* ===== Forms ===== */
.form-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 16px;
}
.form-group { display: flex; flex-direction: column; gap: 4px; }
.form-group label { font-size: 13px; font-weight: 500; color: var(--g700); }
.form-group input, .form-group select, .form-group textarea {
  padding: 8px 12px; border: 1px solid var(--g300); border-radius: 6px;
  font-size: 14px; font-family: inherit; transition: border-color .2s; outline: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,115,232,.1);
}
.form-group input[type="file"] { padding: 6px; border-style: dashed; }
.form-actions { grid-column: 1 / -1; display: flex; gap: 10px; padding-top: 8px; }

/* ===== Tables ===== */
.table-responsive { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
thead th {
  background: var(--g50); padding: 10px 12px; text-align: left;
  font-weight: 600; color: var(--g700); border-bottom: 2px solid var(--g200);
  white-space: nowrap;
}
tbody td { padding: 10px 12px; border-bottom: 1px solid var(--g100); }
tbody tr:hover { background: var(--g50); }
tfoot td { padding: 12px; border-top: 2px solid var(--g300); background: var(--g50); }
.totals-row { font-weight: 600; }
.row-warning { background: #fff8e1 !important; }
.action-btns { display: flex; gap: 6px; }

/* ===== Filters ===== */
.filter-bar {
  display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap;
  margin-bottom: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--g100);
}
.filter-bar input, .filter-bar select {
  padding: 6px 10px; border: 1px solid var(--g300); border-radius: 6px;
  font-size: 13px; outline: none; font-family: inherit;
}
.filter-bar input:focus { border-color: var(--primary); }
.filter-group { display: flex; flex-direction: column; gap: 4px; }
.filter-group label { font-size: 12px; color: var(--g500); font-weight: 500; }

/* ===== Stats Grid ===== */
.stats-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px; margin-bottom: 24px;
}
.stat-card {
  background: #fff; border-radius: var(--radius); padding: 20px;
  box-shadow: var(--shadow); border-left: 4px solid var(--g300);
}
.stat-label {
  font-size: 12px; font-weight: 600; color: var(--g500);
  text-transform: uppercase; letter-spacing: .5px; margin-bottom: 8px;
}
.stat-value { font-size: 24px; font-weight: 700; color: var(--g900); }
.stat-alert { font-size: 12px; color: var(--danger); font-weight: 500; margin-top: 4px; }
.stat-blue { border-left-color: var(--primary); }
.stat-green { border-left-color: var(--success); }
.stat-purple { border-left-color: var(--purple); }
.stat-orange { border-left-color: var(--orange); }
.stat-teal { border-left-color: var(--teal); }
.stat-gray { border-left-color: var(--g500); }

/* ===== Dashboard Tables ===== */
.dashboard-tables { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* ===== Badges ===== */
.badge {
  display: inline-block; padding: 2px 8px; border-radius: 12px;
  font-size: 11px; font-weight: 600; text-transform: uppercase;
}
.badge-blue { background: #e8f0fe; color: var(--primary); }
.badge-green { background: #e6f4ea; color: var(--success); }
.badge-red { background: #fce8e6; color: var(--danger); }
.badge-purple { background: #f3e8fd; color: var(--purple); }

/* ===== Pagination ===== */
.pagination { display: flex; justify-content: center; gap: 4px; padding-top: 16px; }
.pagination-dots { padding: 4px 8px; color: var(--g500); }

/* ===== Notification ===== */
.notification {
  padding: 12px 16px; border-radius: var(--radius); margin-bottom: 16px;
  font-size: 14px; font-weight: 500;
}
.notification-warning { background: #fff8e1; color: #e65100; border: 1px solid #ffe0b2; }

/* ===== Login ===== */
.login-page {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%); padding: 20px;
}
.login-card {
  background: #fff; padding: 40px; border-radius: 12px;
  box-shadow: var(--shadow-lg); width: 100%; max-width: 400px;
}
.login-header { text-align: center; margin-bottom: 32px; }
.login-header h1 { font-size: 28px; font-weight: 700; color: var(--primary); margin-bottom: 4px; }
.login-header p { color: var(--g500); font-size: 14px; }
.login-card .form-group { margin-bottom: 16px; }
.login-card .btn { margin-top: 8px; }
.login-divider { display: flex; align-items: center; margin: 20px 0 12px; }
.login-divider::before, .login-divider::after { content: ''; flex: 1; border-bottom: 1px solid #e0e0e0; }
.login-divider span { padding: 0 12px; color: #999; font-size: 13px; }
.btn-microsoft { background: #fff; color: #333; border: 1px solid #ccc; display: flex; align-items: center; justify-content: center; font-weight: 500; }
.btn-microsoft:hover { background: #f5f5f5; border-color: #999; }

/* ===== Page Header ===== */
.page-header {
  display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px;
}
.page-title { font-size: 22px; font-weight: 700; color: var(--g900); }

/* ===== Toast ===== */
.toast-container {
  position: fixed; top: 16px; right: 16px; z-index: 9999;
  display: flex; flex-direction: column; gap: 8px;
}
.toast {
  padding: 12px 20px; border-radius: var(--radius);
  color: #fff; font-size: 14px; font-weight: 500;
  box-shadow: var(--shadow-lg);
  animation: slideIn .3s ease-out;
  max-width: 400px;
}
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-warning { background: var(--warning); color: var(--g900); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ===== Utility ===== */
.text-center { text-align: center; }
.text-danger { color: var(--danger); font-weight: 600; }
.text-success { color: var(--success); font-weight: 600; }
.link { color: var(--primary); text-decoration: none; font-weight: 500; }
.link:hover { text-decoration: underline; }
.loading { text-align: center; padding: 40px; color: var(--g500); }
.empty-state { text-align: center; padding: 40px; color: var(--g500); }
.mt-1 { margin-top: 8px; }
.mb-2 { margin-bottom: 16px; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay {
    display: block; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,.5); z-index: 999; cursor: pointer;
  }
  .sidebar-overlay.hidden { display: none; }
  .main-area { margin-left: 0; }
  .menu-btn { display: block; }
  .main-content { padding: 16px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .dashboard-tables { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .filter-bar { flex-direction: column; align-items: stretch; }
  .page-header { flex-direction: column; align-items: flex-start; gap: 10px; }
  .navbar-right .user-info { display: none; }
  .action-btns { flex-direction: column; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .stat-value { font-size: 20px; }
  .login-card { padding: 24px; }
}