:root {
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --secondary: #10B981;
    --background: #F3F4F6;
    --surface: #FFFFFF;
    --text-main: #1F2937;
    --text-muted: #6B7280;
    --border: #E5E7EB;
    --danger: #EF4444;
    --radius: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--background);
    color: var(--text-main);
    line-height: 1.6;
}

/* Typography */
h1, h2, h3, h4, h5, h6 { color: var(--text-main); font-weight: 600; }
a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary-hover); }

/* Glassmorphism Auth */
.auth-container {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, #4F46E5 0%, #10B981 100%); padding: 20px;
}
.auth-card {
    background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px);
    border-radius: var(--radius); padding: 40px; width: 100%; max-width: 400px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}
.auth-card h2 { text-align: center; margin-bottom: 30px; font-size: 1.8rem; }

/* Layout & Sidebar */
.app-container { display: flex; min-height: 100vh; overflow-x: hidden; }

.sidebar {
    width: 260px; background-color: var(--surface); border-right: 1px solid var(--border);
    display: flex; flex-direction: column; position: fixed; height: 100vh; z-index: 100;
    transition: transform 0.3s ease;
}
.sidebar.collapsed { transform: translateX(-100%); }

.sidebar-header { padding: 24px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center;}
.sidebar-header h2 { font-size: 1.2rem; color: var(--primary); margin: 0; }

.sidebar-nav { padding: 20px 0; flex: 1; overflow-y: auto; }
.sidebar-nav a {
    display: block; padding: 12px 24px; color: var(--text-muted); font-weight: 500; transition: all 0.2s;
}
.sidebar-nav a:hover, .sidebar-nav a.active {
    background-color: #EEF2FF; color: var(--primary); border-right: 3px solid var(--primary);
}
.sidebar-footer { padding: 20px 24px; border-top: 1px solid var(--border); }

/* Main Content */
.main-content {
    flex: 1; margin-left: 260px; padding: 20px; transition: margin-left 0.3s ease; width: 100%;
}
.main-content.expanded { margin-left: 0; }

.top-bar { display: flex; align-items: center; margin-bottom: 25px; }
.menu-toggle {
    background: none; border: none; font-size: 1.5rem; color: var(--text-main); cursor: pointer;
    margin-right: 15px; padding: 5px; border-radius: 5px;
}
.menu-toggle:hover { background-color: var(--border); }

.page-header { display: flex; justify-content: space-between; align-items: center; width: 100%; margin-bottom: 20px; }

/* Form Elements */
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 500; font-size: 0.95rem; }
input[type="text"], input[type="password"], input[type="email"], input[type="number"], textarea, select {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background-color: var(--surface);
    color: var(--text-main);
    transition: all 0.2s;
    font-size: 0.95rem;
}
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}
select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 16px;
    padding-right: 35px;
}

.btn {
    display: inline-block; font-weight: 500; text-align: center; cursor: pointer;
    border: none; border-radius: var(--radius); transition: all 0.2s;
    touch-action: manipulation; -webkit-user-select: none; user-select: none; -webkit-tap-highlight-color: transparent;
}
.btn-primary { background-color: var(--primary); color: white; }
.btn-primary:hover { background-color: var(--primary-hover); transform: translateY(-1px); box-shadow: 0 4px 6px rgba(79, 70, 229, 0.2); }
.btn-secondary { background-color: #E5E7EB; color: var(--text-main); }
.btn-secondary:hover { background-color: #D1D5DB; }
.btn-danger { background-color: var(--danger); color: white; }
.btn-sm { padding: 6px 12px; font-size: 0.85rem; }

.card {
    background-color: var(--surface); border-radius: var(--radius); padding: 24px; margin-bottom: 24px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05); border: 1px solid var(--border);
}

table { width: 100%; border-collapse: collapse; }
th, td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--border); }
th { background-color: #F9FAFB; font-weight: 600; color: var(--text-muted); font-size: 0.85rem; text-transform: uppercase; }

/* Dashboard Grids */
.grid-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; margin-bottom: 24px; }
.stat-card { background: var(--surface); padding: 24px; border-radius: var(--radius); border: 1px solid var(--border); }
.stat-value { font-size: 2rem; font-weight: 700; color: var(--primary); margin-top: 10px; display: block;}

.alert { padding: 16px; border-radius: 8px; margin-bottom: 20px; }
.alert-error { background-color: #FEE2E2; color: #991B1B; border: 1px solid #F87171; }
.alert-success { background-color: #D1FAE5; color: #065F46; border: 1px solid #34D399; }

/* Responsive Adjustments */
@media (max-width: 992px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.mobile-open { transform: translateX(0); }
    .main-content { margin-left: 0; }
}

/* Form Supervisi Specific */
.table-input td { padding: 8px; }
.table-input input, .table-input select { padding: 10px; font-size: 0.9rem; }
.table-header-group th { text-align: center; background-color: #EEF2FF; color: var(--primary); }
.section-title { background-color: #F3F4F6; padding: 15px; border-radius: 8px; font-weight: 600; margin-bottom: 15px; border-left: 4px solid var(--primary); }
.sidebar-footer a.btn { display: block; width: 100%; text-align: center; box-sizing: border-box; }