/* ========================================
   BUKU TAMU ONLINE - STYLESHEET
   ======================================== */

:root {
    --primary-color: #1e3a5f;
    --secondary-color: #ffc107;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --white-color: #ffffff;
    --border-color: #dee2e6;
}

/* ========================================
   GENERAL STYLES
   ======================================== */

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #333;
    line-height: 1.6;
    background-color: #f8f9fa;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--secondary-color);
    text-decoration: none;
}

.container-fluid {
    padding: 0;
}

/* ========================================
   NAVIGATION & HEADER
   ======================================== */

.navbar {
    background-color: var(--primary-color);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--white-color) !important;
}

.navbar-nav .nav-link {
    color: rgba(255,255,255,0.8) !important;
    margin: 0 0.5rem;
    transition: color 0.3s ease;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--secondary-color) !important;
}

/* ========================================
   SIDEBAR
   ======================================== */

.sidebar {
    background-color: var(--primary-color);
    color: white;
    padding: 2rem 0;
    min-height: 100vh;
    position: sticky;
    top: 0;
}

.sidebar .nav-link {
    color: rgba(255,255,255,0.8);
    padding: 0.75rem 1.5rem;
    margin: 0.5rem 0;
    border-left: 3px solid transparent;
    transition: all 0.3s ease;
}

.sidebar .nav-link:hover,
.sidebar .nav-link.active {
    background-color: rgba(255,255,255,0.1);
    border-left-color: var(--secondary-color);
    color: var(--secondary-color);
}

.sidebar .nav-link i {
    margin-right: 0.5rem;
}

.sidebar .brand {
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    margin-bottom: 2rem;
}

.sidebar .brand h4 {
    color: white;
    margin: 0;
    font-size: 1.2rem;
}

/* ========================================
   MAIN CONTENT
   ======================================== */

.main-content {
    padding: 2rem;
    background-color: #f8f9fa;
}

.page-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--primary-color);
}

.page-header h1 {
    color: var(--primary-color);
    font-weight: 700;
    margin: 0;
}

.page-header p {
    color: #666;
    margin: 0;
    font-size: 0.9rem;
}

/* ========================================
   CARDS & BOXES
   ======================================== */

.card {
    border: none;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    border-radius: 8px;
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.card-header {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 1.25rem;
    font-weight: 600;
    border-radius: 8px 8px 0 0;
}

.card-body {
    padding: 1.5rem;
}

.stat-box {
    background: linear-gradient(135deg, var(--primary-color), #2a5aa1);
    color: white;
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.stat-box.yellow {
    background: linear-gradient(135deg, var(--secondary-color), #ffb300);
    color: #333;
}

.stat-box.green {
    background: linear-gradient(135deg, var(--success-color), #20c997);
    color: white;
}

.stat-box.red {
    background: linear-gradient(135deg, var(--danger-color), #e74c3c);
    color: white;
}

.stat-box h4 {
    margin: 0.5rem 0;
    font-size: 2rem;
    font-weight: 700;
}

.stat-box p {
    margin: 0;
    font-size: 0.9rem;
    opacity: 0.9;
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    border: none;
    border-radius: 6px;
    padding: 0.65rem 1.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: #152d47;
    color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(30,58,95,0.3);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: #333;
}

.btn-secondary:hover {
    background-color: #ffb300;
    color: #000;
}

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

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

.btn-warning {
    background-color: var(--warning-color);
    color: #333;
}

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

.btn-outline-primary {
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    background-color: transparent;
}

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

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 0.8rem 2rem;
    font-size: 1.1rem;
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

/* ========================================
   FORMS
   ======================================== */

.form-control,
.form-select {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.75rem;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(30,58,95,0.25);
}

.form-label {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

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

.required::after {
    content: " *";
    color: var(--danger-color);
}

.form-text {
    font-size: 0.85rem;
    color: #666;
}

.invalid-feedback {
    display: block;
    color: var(--danger-color);
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

.form-control.is-invalid,
.form-select.is-invalid {
    border-color: var(--danger-color);
}

.form-control.is-invalid:focus,
.form-select.is-invalid:focus {
    border-color: var(--danger-color);
    box-shadow: 0 0 0 0.2rem rgba(220,53,69,0.25);
}

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

.table {
    color: #333;
    margin-bottom: 0;
}

.table thead th {
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
    border: none;
    padding: 1rem;
    vertical-align: middle;
}

.table tbody td {
    padding: 1rem;
    border-color: var(--border-color);
    vertical-align: middle;
}

.table tbody tr:hover {
    background-color: rgba(30,58,95,0.05);
}

.table-striped > tbody > tr:nth-of-type(odd) {
    background-color: rgba(0,0,0,0.02);
}

.table-bordered {
    border: 1px solid var(--border-color);
}

.table-bordered th,
.table-bordered td {
    border-color: var(--border-color);
}

/* ========================================
   ALERTS & MESSAGES
   ======================================== */

.alert {
    border: none;
    border-left: 4px solid;
    border-radius: 6px;
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
}

.alert-success {
    background-color: #d4edda;
    border-color: var(--success-color);
    color: #155724;
}

.alert-danger {
    background-color: #f8d7da;
    border-color: var(--danger-color);
    color: #721c24;
}

.alert-warning {
    background-color: #fff3cd;
    border-color: var(--warning-color);
    color: #856404;
}

.alert-info {
    background-color: #d1ecf1;
    border-color: var(--info-color);
    color: #0c5460;
}

.alert-heading {
    font-weight: 700;
    margin-bottom: 0.5rem;
}

/* ========================================
   BADGES
   ======================================== */

.badge {
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.85rem;
}

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

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

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

.badge-warning {
    background-color: var(--warning-color);
    color: #333;
}

.badge-info {
    background-color: var(--info-color);
    color: white;
}

.badge-secondary {
    background-color: #6c757d;
    color: white;
}

/* ========================================
   MODALS
   ======================================== */

.modal-content {
    border: none;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

.modal-header {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 1.5rem;
}

.modal-header .btn-close {
    filter: brightness(0) invert(1);
}

.modal-footer {
    border-top: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
}

/* ========================================
   PAGINATION
   ======================================== */

.pagination {
    margin-top: 2rem;
}

.page-link {
    color: var(--primary-color);
    border: 1px solid var(--border-color);
    padding: 0.5rem 0.75rem;
}

.page-link:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* ========================================
   HOME PAGE
   ======================================== */

.hero-section {
    background: linear-gradient(135deg, var(--primary-color), #2a5aa1);
    color: white;
    padding: 4rem 2rem;
    text-align: center;
    border-radius: 8px;
    margin-bottom: 3rem;
}

.hero-section h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.hero-section p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.qrcode-container {
    text-align: center;
    padding: 2rem;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.qrcode-container img {
    max-width: 300px;
    height: auto;
    margin: 1rem 0;
}

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

.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color), #2a5aa1);
}

.login-box {
    background-color: white;
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
}

.login-box h2 {
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 2rem;
    text-align: center;
}

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

.login-box .btn {
    width: 100%;
    padding: 0.75rem;
}

.login-box .form-check {
    margin-bottom: 1rem;
}

.login-box a {
    font-size: 0.9rem;
}

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

@media (max-width: 768px) {
    .sidebar {
        position: relative;
        min-height: auto;
    }

    .main-content {
        padding: 1rem;
    }

    .page-header {
        margin-bottom: 1rem;
        padding-bottom: 1rem;
    }

    .page-header h1 {
        font-size: 1.5rem;
    }

    .hero-section h1 {
        font-size: 1.8rem;
    }

    .stat-box {
        margin-bottom: 1rem;
    }

    .table {
        font-size: 0.9rem;
    }

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

    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    .navbar {
        padding: 0.5rem 0;
    }

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

@media (max-width: 576px) {
    .main-content {
        padding: 0.5rem;
    }

    .page-header h1 {
        font-size: 1.25rem;
    }

    .hero-section {
        padding: 2rem 1rem;
    }

    .hero-section h1 {
        font-size: 1.5rem;
    }

    .login-box {
        padding: 1.5rem;
        margin: 1rem;
    }

    .card-body {
        padding: 1rem;
    }

    .btn-sm {
        padding: 0.3rem 0.6rem;
        font-size: 0.75rem;
    }

    .table {
        font-size: 0.8rem;
    }

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

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

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: 0.25rem !important; }
.mt-2 { margin-top: 0.5rem !important; }
.mt-3 { margin-top: 1rem !important; }
.mt-4 { margin-top: 1.5rem !important; }
.mt-5 { margin-top: 3rem !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: 0.25rem !important; }
.mb-2 { margin-bottom: 0.5rem !important; }
.mb-3 { margin-bottom: 1rem !important; }
.mb-4 { margin-bottom: 1.5rem !important; }
.mb-5 { margin-bottom: 3rem !important; }

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

.text-primary { color: var(--primary-color) !important; }
.text-success { color: var(--success-color) !important; }
.text-danger { color: var(--danger-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-info { color: var(--info-color) !important; }
.text-muted { color: #6c757d !important; }

.font-weight-bold { font-weight: 700 !important; }
.font-weight-normal { font-weight: 400 !important; }

.opacity-50 { opacity: 0.5 !important; }
.opacity-75 { opacity: 0.75 !important; }

.cursor-pointer { cursor: pointer !important; }

/* ========================================
   PRINT STYLES
   ======================================== */

@media print {
    body {
        background-color: white;
        color: black;
    }

    .sidebar,
    .navbar,
    .btn,
    .pagination,
    .btn-close {
        display: none !important;
    }

    .main-content {
        padding: 0;
    }

    .card {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
    }

    .table {
        border-collapse: collapse;
    }

    .table thead th {
        background-color: #f0f0f0 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
}

/* ========================================
   ANIMATIONS
   ======================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fadeIn {
    animation: fadeIn 0.5s ease-in-out;
}

.slideIn {
    animation: slideIn 0.5s ease-in-out;
}

/* ========================================
   LOADING & SPINNER
   ======================================== */

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0,0,0,0.1);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.loading .spinner {
    margin-right: 1rem;
}

/* ========================================
   SCROLLBAR STYLE
   ======================================== */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #152d47;
}

/* ========================================
   CUSTOM SCROLLBAR (Firefox)
   ======================================== */

* {
    scrollbar-color: var(--primary-color) #f1f1f1;
    scrollbar-width: thin;
}