/* ====================
   JADWAL CBT - STYLE
   ==================== */

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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --success-color: #16a34a;
    --danger-color: #dc2626;
    --warning-color: #ea580c;
    --info-color: #0891b2;
    --light-bg: #f8fafc;
    --dark-bg: #0f172a;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--light-bg);
    color: var(--text-dark);
    line-height: 1.6;
}

/* ====================
   CONTAINER & LAYOUT
   ==================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.navbar {
    background: white;
    padding: 1rem 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1rem;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    white-space: nowrap;
}

.navbar-menu {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
    flex-wrap: wrap;
}

.navbar-menu li {
    display: flex;
    align-items: center;
}

.navbar-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 0.5rem 0.75rem;
    border-radius: 0.375rem;
}

.navbar-menu a:hover {
    color: var(--primary-color);
    background-color: var(--light-bg);
}

.navbar-menu span {
    white-space: nowrap;
}

/* ====================
   BUTTONS & FORMS
   ==================== */

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.375rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: #6b7280;
    color: white;
}

.btn-secondary:hover {
    background-color: #4b5563;
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-success:hover {
    background-color: #15803d;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #b91c1c;
}

.btn-warning {
    background-color: var(--warning-color);
    color: white;
}

.btn-warning:hover {
    background-color: #c2410c;
}

.btn-block {
    display: block;
    width: 100%;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Form */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

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

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.form-group.required label::after {
    content: ' *';
    color: var(--danger-color);
}

.form-error {
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.form-help {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* File Upload */
.file-upload {
    border: 2px dashed var(--border-color);
    border-radius: 0.375rem;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.file-upload:hover {
    border-color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.05);
}

.file-upload input[type="file"] {
    display: none;
}

.file-upload-text {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* ====================
   CARDS & PANELS
   ==================== */

.card {
    background: white;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.card-header {
    background-color: var(--light-bg);
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.card-header h2,
.card-header h3 {
    margin: 0;
    color: var(--text-dark);
}

.card-body {
    padding: 1.5rem;
}

.card-footer {
    background-color: var(--light-bg);
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

/* ====================
   ALERTS & STATUS
   ==================== */

.alert {
    padding: 1rem 1.5rem;
    border-radius: 0.375rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.alert-success {
    background-color: #ecfdf5;
    color: #065f46;
    border-left: 4px solid var(--success-color);
}

.alert-danger {
    background-color: #fef2f2;
    color: #7f1d1d;
    border-left: 4px solid var(--danger-color);
}

.alert-warning {
    background-color: #fffbeb;
    color: #78350f;
    border-left: 4px solid var(--warning-color);
}

.alert-info {
    background-color: #ecf8ff;
    color: #0c4a6e;
    border-left: 4px solid var(--info-color);
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
}

.badge-success {
    background-color: #d1fae5;
    color: #065f46;
}

.badge-danger {
    background-color: #fee2e2;
    color: #991b1b;
}

.badge-warning {
    background-color: #fef3c7;
    color: #78350f;
}

.badge-info {
    background-color: #cffafe;
    color: #0c4a6e;
}

.badge-primary {
    background-color: #dbeafe;
    color: #1e40af;
}

/* ====================
   TABLES
   ==================== */

.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.table thead {
    background-color: var(--light-bg);
}

.table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid var(--border-color);
}

.table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.table tbody tr:hover {
    background-color: rgba(37, 99, 235, 0.02);
}

.table-responsive {
    overflow-x: auto;
}

/* ====================
   LOGIN PAGE
   ==================== */

.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.login-box {
    background: white;
    padding: 3rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
}

.login-box h1 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.login-box .form-group {
    margin-bottom: 1.25rem;
}

/* ====================
   DASHBOARD
   ==================== */

.dashboard {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary-color);
}

.stat-card h3 {
    color: var(--text-light);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-card .number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-dark);
}

.stat-card.success {
    border-left-color: var(--success-color);
}

.stat-card.danger {
    border-left-color: var(--danger-color);
}

.stat-card.warning {
    border-left-color: var(--warning-color);
}

/* ====================
   HERO SECTION
   ==================== */

.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 4rem 1rem;
    text-align: center;
    border-radius: 0.75rem;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* ====================
   FOOTER
   ==================== */

footer {
    background: var(--dark-bg);
    color: white;
    padding: 2rem 0;
    margin-top: 3rem;
    text-align: center;
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* ====================
   MODAL
   ==================== */

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: white;
    padding: 2rem;
    border-radius: 0.75rem;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-header h2 {
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
}

/* ====================
   RESPONSIVE DESIGN
   ==================== */

@media (max-width: 768px) {
    /* Navbar - Tablet Responsive */
    .navbar-content {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .navbar-brand {
        font-size: 1.25rem;
        order: 1;
    }

    .navbar-menu {
        order: 2;
        width: 100%;
        gap: 0.5rem;
        padding: 0.75rem 0 0 0;
        border-top: 1px solid var(--border-color);
        flex-wrap: wrap;
    }

    .navbar-menu li:nth-child(n+2):not(:last-child) {
        margin-right: auto;
    }

    .navbar-menu a {
        font-size: 0.9rem;
        padding: 0.5rem 0.75rem;
    }

    .navbar-menu .btn {
        margin-left: 0;
        padding: 0.6rem 0.75rem;
        font-size: 0.85rem;
    }

    .dashboard {
        grid-template-columns: 1fr 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .login-box {
        padding: 2rem;
    }

    .card-footer {
        flex-direction: column;
    }

    .card-footer .btn {
        margin: 0;
    }

    .table {
        font-size: 0.875rem;
    }

    .table th,
    .table td {
        padding: 0.75rem 0.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }

    /* Navbar - Mobile Optimized */
    .navbar {
        padding: 0.75rem 0;
    }

    .navbar-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .navbar-brand {
        font-size: 1.1rem;
        width: 100%;
    }

    .navbar-menu {
        width: 100%;
        gap: 0.25rem;
        padding: 0.75rem 0 0 0;
        border-top: 1px solid var(--border-color);
        flex-wrap: wrap;
    }

    .navbar-menu li {
        flex: 1 1 auto;
        min-width: 80px;
    }

    .navbar-menu li:last-child {
        margin-left: 0;
    }

    .navbar-menu a {
        font-size: 0.8rem;
        padding: 0.5rem 0.5rem;
        text-align: center;
        display: block;
        word-wrap: break-word;
    }

    .navbar-menu .btn {
        padding: 0.5rem 0.5rem;
        font-size: 0.75rem;
        margin-left: 0;
    }

    .dashboard {
        grid-template-columns: 1fr;
    }

    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.875rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    h2 {
        font-size: 1.25rem;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 16px;
    }

    .alert {
        flex-direction: column;
        text-align: center;
    }

    .stat-card .number {
        font-size: 1.5rem;
    }
}

/* ====================
   UTILITY CLASSES
   ==================== */

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.text-primary { color: var(--primary-color); }
.text-danger { color: var(--danger-color); }
.text-success { color: var(--success-color); }
.text-warning { color: var(--warning-color); }

.d-none { display: none; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.flex-wrap { flex-wrap: wrap; }
.justify-center { justify-content: center; }
.items-center { align-items: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }