* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', sans-serif; }
body { background: #f4f6f9; color: #333; }
a { color: #3b82f6; text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 900px; margin: 40px auto; padding: 20px; background: #fff; border-radius: 12px; box-shadow: 0 4px 20px rgba(0,0,0,0.08); }
header h1 { color: #1e3a8a; margin-bottom: 6px; }
header p { color: #666; margin-bottom: 20px; }
footer { margin-top: 30px; text-align: center; }

.filter-form { display: flex; gap: 20px; flex-wrap: wrap; margin-bottom: 20px; padding: 15px; background: #f9fafb; border-radius: 8px; }
.filter-form label { display: flex; flex-direction: column; gap: 6px; font-weight: 600; }
.filter-form select { padding: 8px 12px; border: 1px solid #ccc; border-radius: 6px; min-width: 220px; }

.tabel-nilai, .tabel-admin { width: 100%; border-collapse: collapse; margin-top: 15px; }
.tabel-nilai th, .tabel-nilai td, .tabel-admin th, .tabel-admin td { padding: 10px 14px; border-bottom: 1px solid #e5e7eb; text-align: left; }
.tabel-nilai th, .tabel-admin th { background: #1e3a8a; color: #fff; }
.tabel-nilai tr:hover, .tabel-admin tr:hover { background: #f1f5f9; }
.empty, .info { text-align: center; padding: 20px; color: #888; }

/* Login */
.login-box { max-width: 380px; margin: 80px auto; background: #fff; padding: 30px; border-radius: 12px; box-shadow: 0 4px 20px rgba(0,0,0,0.1); }
.login-box h2 { text-align: center; margin-bottom: 20px; color: #1e3a8a; }
.login-box input { width: 100%; padding: 12px; margin-bottom: 12px; border: 1px solid #ccc; border-radius: 8px; }
.login-box button { width: 100%; padding: 12px; background: #1e3a8a; color: #fff; border: none; border-radius: 8px; cursor: pointer; font-weight: 600; }
.login-box button:hover { background: #1e40af; }
.error { color: #dc2626; text-align: center; margin-bottom: 10px; }
.success { color: #16a34a; background: #dcfce7; padding: 10px; border-radius: 6px; margin-bottom: 10px; }

/* Admin Layout */
.admin-layout { display: flex; min-height: 100vh; }
.sidebar { width: 240px; background: #1e3a8a; color: #fff; padding: 20px 0; }
.sidebar h3 { padding: 0 20px 15px; border-bottom: 1px solid rgba(255,255,255,0.2); margin-bottom: 10px; }
.sidebar a { display: block; color: #cbd5e1; padding: 12px 20px; transition: 0.2s; }
.sidebar a:hover, .sidebar a.active { background: rgba(255,255,255,0.1); color: #fff; text-decoration: none; }
.sidebar a.logout { color: #fca5a5; margin-top: 20px; border-top: 1px solid rgba(255,255,255,0.1); }

.content { flex: 1; padding: 30px; }
.content h1 { color: #1e3a8a; margin-bottom: 15px; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr)); gap: 20px; margin-top: 20px; }
.stat-card { background: #fff; padding: 25px; border-radius: 10px; box-shadow: 0 2px 10px rgba(0,0,0,0.06); text-align: center; }
.stat-card h2 { font-size: 2.5rem; color: #1e3a8a; }
.stat-card p { color: #666; }

.form-inline { display: flex; gap: 10px; margin: 15px 0; flex-wrap: wrap; align-items: center; }
.form-inline input, .form-inline select { padding: 10px; border: 1px solid #ccc; border-radius: 6px; }
.form-inline button { padding: 10px 18px; background: #1e3a8a; color: #fff; border: none; border-radius: 6px; cursor: pointer; }
.btn-hapus { color: #dc2626; }
.btn-simpan { margin-top: 15px; padding: 12px 30px; background: #16a34a; color: #fff; border: none; border-radius: 6px; cursor: pointer; font-weight: 600; }
.tabel-admin input[type=number] { padding: 6px; width: 100px; border: 1px solid #ccc; border-radius: 6px; }