:root {
    --primary: #2563eb; /* Biru Modern */
    --secondary: #1e40af;
    --bg-light: #f3f4f6;
    --white: #ffffff;
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --radius: 8px;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; }

body {
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
}

/* AUTH PAGE LAYOUT */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-box {
    background: var(--white);
    width: 100%;
    max-width: 420px;
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    text-align: center;
}

.auth-box h2 {
    margin-bottom: 10px;
    color: var(--primary);
    font-weight: 700;
}

.auth-box p { margin-bottom: 30px; color: var(--text-gray); }

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #e5e7eb;
    border-radius: var(--radius);
    transition: border-color 0.3s;
    font-size: 1rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 600;
    width: 100%;
    font-size: 1rem;
    transition: background-color 0.3s;
}

.btn:hover { background-color: var(--secondary); }

.error-msg {
    background: #fee2e2;
    color: #b91c1c;
    padding: 10px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-size: 0.9rem;
}

/* LAYOUT STRUCTURE */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* SIDEBAR */
.sidebar {
    width: 260px;
    background-color: #1e293b; /* Dark Slate */
    color: #fff;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.sidebar-brand {
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid #334155;
}
.sidebar-brand h2 { font-size: 1.2rem; color: #fff; margin: 0; }
.sidebar-brand small { color: #94a3b8; font-size: 0.8rem; }

.sidebar-nav ul { list-style: none; padding: 0; margin-top: 20px; }
.sidebar-nav li a {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: #cbd5e1;
    text-decoration: none;
    transition: background 0.3s;
}
.sidebar-nav li a i { width: 20px; margin-right: 15px; text-align: center; }
.sidebar-nav li a:hover, .sidebar-nav li a.active {
    background-color: var(--primary);
    color: #fff;
}
.nav-divider {
    padding: 10px 20px;
    font-size: 0.7rem;
    text-transform: uppercase;
    color: #64748b;
    margin-top: 10px;
}

/* MAIN CONTENT */
.main-content {
    margin-left: 260px;
    flex: 1;
    background-color: #f1f5f9;
}

.topbar {
    background: #fff;
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}
.topbar h3 { font-size: 1rem; color: #475569; font-weight: 500; }
.badge { padding: 5px 10px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; }
.badge-success { background: #dcfce7; color: #166534; }

.content-wrapper { padding: 30px; }

/* CARDS */
.card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}
.card-header { padding: 15px 20px; border-bottom: 1px solid #f1f5f9; }
.card-header h4 { margin: 0; font-size: 1rem; color: #334155; }
.card-body { padding: 20px; }

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.stat-card {
    display: flex;
    align-items: center;
    padding: 20px;
    color: #fff;
}
.stat-icon { font-size: 2rem; margin-right: 20px; opacity: 0.8; }
.stat-info h4 { margin: 0; font-size: 0.9rem; opacity: 0.9; }
.stat-info p { margin: 0; font-size: 1.5rem; font-weight: 700; margin-top: 5px; }

/* COLORS */
.bg-blue { background: linear-gradient(135deg, #2563eb, #1d4ed8); }
.bg-orange { background: linear-gradient(135deg, #ea580c, #c2410c); }
.bg-green { background: linear-gradient(135deg, #16a34a, #15803d); }

.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }

/* PREMIUM TABLE */
.table-premium { width: 100%; border-collapse: collapse; }
.table-premium th { background-color: #f8fafc; color: #64748b; font-weight: 600; text-align: left; padding: 15px; font-size: 0.85rem; text-transform: uppercase; border-bottom: 1px solid #e2e8f0; }
.table-premium td { padding: 15px; border-bottom: 1px solid #f1f5f9; color: #334155; }
.table-premium tr:hover { background-color: #f8fafc; }

.badge-danger { background: #fee2e2; color: #b91c1c; }
.badge-warning { background: #fef3c7; color: #92400e; }
.btn-sm { padding: 5px 15px; font-size: 0.8rem; }