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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #f5f5f5;
  color: #333;
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

/* Navigation */
.main-nav {
  background: #1e293b;
  color: #fff;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-brand {
  font-size: 1.25rem;
  font-weight: bold;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  flex: 1;
}

.nav-links a {
  color: #94a3b8;
  text-decoration: none;
}

.nav-links a:hover {
  color: #fff;
}

.nav-user {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: #94a3b8;
}

/* Forms */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #d1d5db;
  border-radius: 0.375rem;
  font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-row {
  display: flex;
  gap: 1rem;
}

.form-row .form-group {
  flex: 1;
}

.inline-form {
  display: flex;
  gap: 0.5rem;
  align-items: flex-end;
}

.inline-form input {
  flex: 1;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.375rem;
  font-size: 1rem;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  transition: background 0.2s;
}

.btn-primary {
  background: #3b82f6;
  color: #fff;
}

.btn-primary:hover {
  background: #2563eb;
}

.btn-danger {
  background: #ef4444;
  color: #fff;
}

.btn-danger:hover {
  background: #dc2626;
}

.btn-small {
  padding: 0.375rem 0.75rem;
  font-size: 0.875rem;
}

.btn-group {
  display: flex;
  gap: 0.5rem;
}

/* Cards */
.card {
  background: #fff;
  border-radius: 0.5rem;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.card h2 {
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid #e5e7eb;
}

th {
  background: #f9fafb;
  font-weight: 600;
}

tr:hover {
  background: #f9fafb;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: #fff;
  border-radius: 0.5rem;
  padding: 1.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.stat-card h3 {
  font-size: 1rem;
  color: #666;
  margin-bottom: 0.5rem;
}

.stat-numbers {
  display: flex;
  gap: 1rem;
  font-size: 1.5rem;
  font-weight: bold;
}

.stat-in { color: #22c55e; }
.stat-out { color: #f59e0b; }

/* Location Grid */
.location-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.location-card {
  display: block;
  background: #fff;
  border: 2px solid #e5e7eb;
  border-radius: 0.5rem;
  padding: 1.5rem;
  text-decoration: none;
  color: inherit;
  text-align: center;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.location-card:hover {
  border-color: #3b82f6;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.location-card h3 {
  margin-bottom: 0.5rem;
}

.location-card span {
  color: #3b82f6;
  font-size: 0.875rem;
}

/* Alerts */
.error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #dc2626;
  padding: 1rem;
  border-radius: 0.375rem;
  margin-bottom: 1rem;
}

.success {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  color: #16a34a;
  padding: 1rem;
  border-radius: 0.375rem;
  margin-bottom: 1rem;
}

/* Text utilities */
.text-success { color: #22c55e; }
.text-warning { color: #f59e0b; }
.text-danger { color: #ef4444; }

/* Login Page */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: #1e293b;
}

.login-container {
  background: #fff;
  padding: 2rem;
  border-radius: 0.5rem;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.login-container h1 {
  text-align: center;
  margin-bottom: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
  .main-nav {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .form-row {
    flex-direction: column;
  }

  .inline-form {
    flex-direction: column;
  }
}