* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', sans-serif; background: #f4f6f9; }
.admin-container { max-width: 1400px; margin: 0 auto; padding: 20px; }
header { background: #1e3a8a; color: white; padding: 15px 20px; border-radius: 8px; display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; background: white; padding: 12px; border-radius: 8px; }
.tabs button { padding: 10px 16px; border: none; background: #e2e8f0; border-radius: 6px; cursor: pointer; }
.tabs button.active { background: #1e3a8a; color: white; }
.controls { margin-bottom: 15px; display: flex; gap: 10px; }
.controls input { padding: 10px; width: 300px; border: 1px solid #ccc; border-radius: 6px; }
table { width: 100%; border-collapse: collapse; background: white; }
th, td { padding: 12px; border-bottom: 1px solid #eee; text-align: left; }
th { background: #f1f5f9; }
tr:hover { background: #f8fafc; }
.login-card { max-width: 400px; margin: 100px auto; background: white; padding: 40px; border-radius: 12px; box-shadow: 0 10px 25px rgba(0,0,0,0.15); text-align: center; }
.login-card input { width: 100%; padding: 14px; margin: 10px 0; border: 1px solid #ddd; border-radius: 6px; }
.login-card button { width: 100%; padding: 14px; background: #1e3a8a; color: white; border: none; border-radius: 6px; margin-top: 10px; }
.error { color: red; margin-top: 10px; }