/**
 * Aplikasi Wali Kelas - Stylesheet
 * Modern, clean, responsive design
 */

/* ========== CSS Variables ========== */
:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --secondary: #64748b;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    
    --bg-body: #f1f5f9;
    --bg-white: #ffffff;
    --bg-dark: #1e293b;
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --text-white: #ffffff;
    
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    
    --radius: 8px;
    --radius-lg: 12px;
}

/* ========== Reset & Base ========== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

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

a:hover {
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
}

/* ========== Typography ========== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 0.5rem;
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.375rem; }
h3 { font-size: 1.125rem; }

.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-center { text-align: center; }

/* ========== Layout ========== */
.container {
    width: 100%;
    max-width: 100%;
    padding: 1.5rem;
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: -0.75rem;
}

.col-4 {
    flex: 0 0 33.333%;
    padding: 0.75rem;
}

.col-6 {
    flex: 0 0 50%;
    padding: 0.75rem;
}

.col-8 {
    flex: 0 0 66.666%;
    padding: 0.75rem;
}

.col-12 {
    flex: 0 0 100%;
    padding: 0.75rem;
}

@media (max-width: 768px) {
    .col-4, .col-6, .col-8 { flex: 0 0 100%; }
}

/* ========== Sidebar Layout ========== */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--bg-dark);
    color: var(--text-white);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-white);
    font-weight: 700;
    font-size: 1.125rem;
}

.sidebar-brand:hover {
    text-decoration: none;
    color: var(--text-white);
}

.brand-icon {
    font-size: 1.5rem;
}

.sidebar-close {
    display: none;
    background: none;
    border: none;
    color: var(--text-white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

.sidebar-user {
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.user-avatar {
    width: 42px;
    height: 42px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.125rem;
}

.user-info {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-role {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.6);
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem 0;
}

.nav-section {
    margin-bottom: 0.5rem;
}

.nav-section-title {
    padding: 0.75rem 1.25rem 0.5rem;
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: rgba(255,255,255,0.4);
    font-weight: 600;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 1.25rem;
    color: rgba(255,255,255,0.7);
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.nav-link:hover {
    background: rgba(255,255,255,0.05);
    color: var(--text-white);
    text-decoration: none;
}

.nav-link.active {
    background: rgba(255,255,255,0.1);
    color: var(--text-white);
    border-left-color: var(--primary);
}

.nav-icon {
    font-size: 1.125rem;
    width: 24px;
    text-align: center;
}

.sidebar-footer {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 0.5rem 0;
}

.nav-logout:hover {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
}

/* Sidebar Overlay (Mobile) */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
}

/* ========== Topbar ========== */
.topbar {
    height: 60px;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    position: sticky;
    top: 0;
    z-index: 100;
    gap: 1rem;
    box-shadow: var(--shadow);
}

.topbar-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem;
    color: var(--text-primary);
}

.topbar-title {
    font-weight: 600;
    font-size: 1.125rem;
}

.topbar-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.topbar-date {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ========== Main Content ========== */
.main-content {
    flex: 1;
    margin-left: 260px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content .container {
    flex: 1;
    padding: 1.5rem;
    max-width: 100%;
}

/* ========== Responsive Sidebar ========== */
@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .sidebar-close {
        display: block;
    }
    
    .sidebar-overlay.active {
        display: block;
    }
    
    .topbar-toggle {
        display: block;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .main-content .container {
        padding: 1rem;
    }
}

@media (max-width: 576px) {
    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .page-header .btn {
        width: 100%;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}


/* ========== Page Header ========== */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-header h1 {
    margin-bottom: 0;
}

.page-header p {
    color: var(--text-secondary);
    margin: 0;
    width: 100%;
}

/* ========== Cards ========== */
.card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card h2 {
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.card-info {
    background: #eff6ff;
    border-left: 4px solid var(--info);
}

.card-info h3 {
    color: var(--info);
}

/* ========== Stats Grid ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    text-align: center;
}

.stat-card h3 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
}

/* Stats Mini */
.stats-mini {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.stat-mini {
    flex: 1;
    min-width: 80px;
    padding: 1rem;
    border-radius: var(--radius);
    text-align: center;
}

.stat-mini span {
    display: block;
    font-size: 0.75rem;
    margin-bottom: 0.25rem;
}

.stat-mini strong {
    font-size: 1.5rem;
}

.stat-success { background: #dcfce7; color: #166534; }
.stat-info { background: #dbeafe; color: #1e40af; }
.stat-warning { background: #fef3c7; color: #92400e; }
.stat-danger { background: #fee2e2; color: #991b1b; }

/* ========== Menu Grid ========== */
.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
}

.menu-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.5rem 1rem;
    background: var(--bg-body);
    border-radius: var(--radius);
    transition: all 0.2s;
    text-align: center;
    color: var(--text-primary);
}

.menu-item:hover {
    background: var(--primary);
    color: var(--text-white);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.menu-item .icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-1px);
}

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

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

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

.btn-secondary:hover {
    background: #475569;
    color: var(--text-white);
}

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

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

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

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

.btn-block {
    width: 100%;
}

.btn-group {
    display: flex;
    gap: 0.5rem;
}

/* ========== Forms ========== */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.375rem;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.9375rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--bg-white);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-control-sm {
    padding: 0.375rem 0.625rem;
    font-size: 0.8125rem;
}

select.form-control {
    cursor: pointer;
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

.form-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 1rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* ========== Tables ========== */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    font-weight: 600;
    background: var(--bg-body);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.table tbody tr:hover {
    background: #f8fafc;
}

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

@media (max-width: 768px) {
    .table th, .table td {
        padding: 0.5rem;
        font-size: 0.875rem;
    }
}


/* ========== Badges ========== */
.badge {
    display: inline-block;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 50px;
}

.badge-success {
    background: #dcfce7;
    color: #166534;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

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

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

.badge-secondary {
    background: #e2e8f0;
    color: #475569;
}

/* ========== Alerts ========== */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: 0.9375rem;
}

.alert-success {
    background: #dcfce7;
    color: #166534;
    border-left: 4px solid var(--success);
}

.alert-error,
.alert-danger {
    background: #fee2e2;
    color: #991b1b;
    border-left: 4px solid var(--danger);
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border-left: 4px solid var(--warning);
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border-left: 4px solid var(--info);
}

/* ========== Status Buttons (Absensi) ========== */
.status-buttons {
    display: flex;
    gap: 0.25rem;
}

.status-btn {
    cursor: pointer;
}

.status-btn input {
    display: none;
}

.status-btn span {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.8125rem;
    font-weight: 600;
    transition: all 0.2s;
    border: 2px solid transparent;
}

.status-h span { background: #dcfce7; color: #166534; }
.status-i span { background: #dbeafe; color: #1e40af; }
.status-s span { background: #fef3c7; color: #92400e; }
.status-a span { background: #fee2e2; color: #991b1b; }

.status-btn input:checked + span {
    transform: scale(1.05);
}

.status-h input:checked + span { background: var(--success); color: white; }
.status-i input:checked + span { background: var(--info); color: white; }
.status-s input:checked + span { background: var(--warning); color: white; }
.status-a input:checked + span { background: var(--danger); color: white; }

/* ========== Quick Actions ========== */
.quick-actions {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

/* ========== Info Box ========== */
.info-box {
    background: var(--bg-body);
    padding: 1rem;
    border-radius: var(--radius);
}

.info-box p {
    margin: 0.25rem 0;
}

/* ========== Login Page ========== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 1rem;
}

.login-box {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.login-box h1 {
    color: var(--primary);
    margin-bottom: 0.25rem;
}

.login-box .subtitle {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.login-box .form-group {
    text-align: left;
}

.login-box .btn {
    margin-top: 1rem;
}

/* ========== Modal ========== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    transform: translateY(-20px);
    transition: transform 0.3s;
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
}

/* ========== Loading Spinner ========== */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

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

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    color: var(--text-muted);
}

/* ========== Empty State ========== */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.empty-state .icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* ========== Pagination ========== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.25rem;
    margin-top: 1.5rem;
}

.pagination a,
.pagination span {
    padding: 0.5rem 0.875rem;
    border-radius: var(--radius);
    font-size: 0.875rem;
}

.pagination a {
    background: var(--bg-white);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.pagination a:hover {
    background: var(--bg-body);
    text-decoration: none;
}

.pagination .active {
    background: var(--primary);
    color: var(--text-white);
    border-color: var(--primary);
}

/* ========== Utilities ========== */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }

.hidden { display: none !important; }

/* ========== Print Styles ========== */
@media print {
    .navbar, .btn, .quick-actions, .form-actions {
        display: none !important;
    }
    
    body {
        background: white;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}
/* ========== Button Groups ========== */
.btn-group {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.btn-group .btn {
    margin: 0;
}

/* ========== Print Styles ========== */
@media print {
    .no-print {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
        font-size: 12px;
    }
    
    .page-header {
        border-bottom: 2px solid #000;
        margin-bottom: 20px;
        padding-bottom: 10px;
    }
    
    table {
        border-collapse: collapse;
        width: 100%;
    }
    
    th, td {
        border: 1px solid #000;
        padding: 8px;
        text-align: left;
    }
    
    th {
        background-color: #f0f0f0;
        font-weight: bold;
    }
}

/* ========== WhatsApp Modal Styles ========== */
.modal-body .form-group {
    margin-bottom: 1rem;
}

.modal-body .text-muted {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* ========== Responsive Button Groups ========== */
@media (max-width: 768px) {
    .btn-group {
        flex-direction: column;
    }
    
    .btn-group .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }
}

/* ========== Loading States ========== */
.btn.loading {
    position: relative;
    color: transparent;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}