/**
 * Main CSS Framework
 * Optimized for SMK Attendance System
 * Mobile-first, responsive design
 */

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --secondary: #64748b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #06b6d4;

    /* Grays */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--gray-50);
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

.page-header {
    margin-bottom: var(--spacing-xl);
}

.page-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
}

.page-header p {
    color: var(--gray-600);
}

/* ============================================
   HEADER NAVIGATION
   ============================================ */
.admin-header,
.teacher-header,
.student-header,
.parent-header {
    background: white;
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.main-nav {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--gray-600);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.nav-link:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

.nav-link.active {
    background: var(--primary);
    color: white;
}

.user-menu {
    position: relative;
}

.user-menu-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--gray-100);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.user-menu-btn:hover {
    background: var(--gray-200);
}

.user-name {
    font-weight: 600;
}

.user-role {
    font-size: 0.875rem;
    color: var(--gray-600);
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--spacing-sm);
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    z-index: 1000;
}

.dropdown-item {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--gray-700);
    text-decoration: none;
    transition: var(--transition);
}

.dropdown-item:hover {
    background: var(--gray-50);
}

.dropdown-divider {
    margin: var(--spacing-sm) 0;
    border: none;
    border-top: 1px solid var(--gray-200);
}

/* ============================================
   CARDS
   ============================================ */
.dashboard-card,
.info-card,
.stat-card,
.class-info-card,
.student-info-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
}

.dashboard-card h2,
.info-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--gray-900);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    /* 4 columns on desktop */
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

/* Symmetric layout for 6 cards */
.stats-grid.six-cards {
    grid-template-columns: repeat(3, 1fr); /* 3x2 grid on desktop */
}

/* Responsive adjustments for stats grid */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
        /* 3 columns on tablet */
    }
    
    .stats-grid.six-cards {
        grid-template-columns: repeat(2, 1fr); /* 2x3 grid on tablet */
    }
}

@media (max-width: 640px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        /* 2 columns on mobile */
    }
}

.stat-card {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin: var(--spacing-sm) 0;
}

.stat-number.success {
    color: var(--success);
}

.stat-number.warning {
    color: var(--warning);
}

.stat-number.danger {
    color: var(--danger);
}

.stat-label {
    color: var(--gray-600);
    font-size: 0.875rem;
}

/* Info Cards Grid */
.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.info-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.info-icon {
    font-size: 2rem;
}

.info-value {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

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

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

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-800);
}

.btn-secondary:hover {
    background: var(--gray-300);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--gray-300);
    color: var(--gray-700);
}

.btn-outline:hover {
    background: var(--gray-50);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 1.1rem;
    transition: var(--transition);
}

.btn-icon:hover {
    background: var(--gray-100);
    transform: scale(1.05);
}

.btn-icon.danger:hover {
    background: #fee2e2;
    color: var(--danger);
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--gray-700);
}

.form-group input:not([type="checkbox"]),
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:not([type="checkbox"]):focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group small {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--gray-500);
    font-size: 0.875rem;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    margin: 0;
    flex-shrink: 0;
    accent-color: var(--primary);
}

/* Specific styling for remember me checkbox */
#remember_me {
    width: 18px !important;
    height: 18px !important;
    cursor: pointer;
    margin: 0 !important;
    flex-shrink: 0;
    accent-color: var(--primary);
}

#remember_me+span {
    margin-left: 8px;
}

label[for="remember_me"],
label:has(#remember_me) {
    display: flex;
    align-items: center;
    cursor: pointer;
    gap: 0;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

/* ============================================
   TABLES
   ============================================ */
.table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    /* Smooth scroll on iOS */
    margin-bottom: var(--spacing-lg);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.data-table thead {
    background: var(--gray-100);
}

.data-table th,
.data-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.data-table th {
    font-weight: 600;
    color: var(--gray-700);
}

.data-table tbody tr:hover {
    background: var(--gray-50);
}

.data-table .actions {
    /* Removed display: flex to maintain table cell vertical alignment */
    text-align: center;
    vertical-align: middle;
}

.action-buttons {
    display: flex;
    gap: 8px;
    justify-content: center;
    align-items: center;
}

/* ============================================
   BADGES
   ============================================ */
.badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
}

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

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

.badge-warning,
.badge-late {
    background: var(--warning);
    color: white;
}

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

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

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

.badge-secondary {
    background: var(--gray-300);
    color: var(--gray-700);
}

.badge-student {
    background: #8b5cf6;
    color: white;
}

.badge-teacher {
    background: #06b6d4;
    color: white;
}

.badge-parent {
    background: #f59e0b;
    color: white;
}

.badge-admin {
    background: #ef4444;
    color: white;
}

/* ============================================
   ALERTS
   ============================================ */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border-left: 4px solid var(--success);
}

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

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

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

/* ============================================
   MODALS
   ============================================ */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray-500);
}

.modal-close:hover {
    color: var(--gray-700);
}

.modal form {
    padding: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    padding-top: var(--spacing-md);
}

/* Student Attendance Modal Specific Styles */
#student-attendance-modal .modal-content {
    max-width: 900px;
    width: 90%;
}

#student-attendance-content {
    padding: var(--spacing-lg);
}

#student-attendance-content .stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

#student-attendance-content table {
    width: 100%;
    border-collapse: collapse;
}

#student-attendance-content th {
    text-align: left;
    padding: 0.75rem;
    border-bottom: 1px solid var(--gray-200);
    font-weight: 600;
    color: var(--gray-700);
    background: var(--gray-50);
}

#student-attendance-content td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--gray-100);
}

#student-attendance-content tr:hover {
    background: var(--gray-50);
}

/* ============================================
   PAGINATION
   ============================================ */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.page-info {
    color: var(--gray-600);
}

/* ============================================
   CHARTS
   ============================================ */
.chart-container {
    position: relative;
    height: 300px;
    margin-top: var(--spacing-md);
}

/* ============================================
   QR CODE DISPLAY
   ============================================ */
.qr-display {
    text-align: center;
    padding: var(--spacing-xl);
}

.qr-code-container {
    display: inline-block;
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    margin: var(--spacing-lg) 0;
}

.qr-code-image {
    max-width: 300px;
    width: 100%;
    height: auto;
}

.qr-timer {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-top: var(--spacing-md);
}

.qr-timer.warning {
    color: var(--warning);
}

.qr-timer.danger {
    color: var(--danger);
}

/* ============================================
   UTILITIES
   ============================================ */
.text-center {
    text-align: center;
}

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

.mt-1 {
    margin-top: var(--spacing-sm);
}

.mt-2 {
    margin-top: var(--spacing-md);
}

.mt-3 {
    margin-top: var(--spacing-lg);
}

.mb-1 {
    margin-bottom: var(--spacing-sm);
}

.mb-2 {
    margin-bottom: var(--spacing-md);
}

.mb-3 {
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .header-left {
        width: 100%;
        justify-content: space-between;
    }

    .main-nav {
         /* Make nav horizontal scrollable on mobile */
         width: 100%;
         overflow-x: auto;
         padding-bottom: var(--spacing-xs);
         white-space: nowrap;
    }
    
    .main-nav .nav-link {
        display: inline-block;
    }

    .dashboard-grid {
        grid-template-columns: 1fr !important; /* Stack vertically */
    }
    
    .quick-actions {
        flex-direction: column;
    }
    
    .quick-actions .btn {
        width: 100%;
        margin-bottom: var(--spacing-sm);
    }

    /* Make badges smaller on mobile */
    .badge {
        font-size: 0.7em;
        padding: 2px 6px;
    }
}

/* Dashboard Grid Layout (Desktop default) */
.dashboard-grid {
    display: grid; 
    grid-template-columns: 2fr 1fr; 
    gap: 1.5rem; 
    margin-bottom: 2rem;
}

/* Quick Actions Container */
.quick-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .main-nav {
        flex-wrap: wrap;
        justify-content: center;
    }


    .info-cards {
        grid-template-columns: 1fr;
    }

    .table-container {
        font-size: 0.875rem;
        position: relative;
    }

    .data-table th,
    .data-table td {
        padding: var(--spacing-sm);
        white-space: nowrap;
    }

    /* Hide ID column on mobile to save space */
    .data-table th:nth-child(2),
    .data-table td:nth-child(2) {
        display: none;
    }

    /* Ensure action buttons remain visible and accessible */
    .data-table .actions {
        min-width: 120px;
    }
}

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

.login-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    max-width: 1000px;
    width: 90%;
}

.login-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-xl);
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.login-header h1 {
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.login-info {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    color: white;
}

.login-info h2 {
    margin-bottom: var(--spacing-md);
}

.login-info ul {
    list-style: none;
    margin: var(--spacing-lg) 0;
}

.login-info li {
    padding: var(--spacing-sm) 0;
}

.demo-credentials {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
}

.error-message,
.success-message {
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.error-message {
    background: #fee2e2;
    color: #991b1b;
}

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

@media (max-width: 768px) {
    .login-container {
        grid-template-columns: 1fr;
    }

    .login-info {
        display: none;
    }
}