/* Modern and Mobile-Friendly Styles for Teacher Attendance System */

:root {
    --primary-color: #4CAF50;
    --primary-dark: #45a049;
    --secondary-color: #2196F3;
    --accent-color: #FF9800;
    --error-color: #f44336;
    --success-color: #4CAF50;
    --background-color: #f5f5f5;
    --card-background: #ffffff;
    --text-color: #333333;
    --text-light: #666666;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--background-color) 0%, #e8f5e8 100%);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

/* Admin pages body styling */
.admin-page {
    align-items: flex-start;
    padding: 20px 10px;
    background: var(--background-color);
}

.container {
    background: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 30px;
    width: 100%;
    max-width: 450px;
    position: relative;
    overflow: hidden;
}

.admin-container {
    background: var(--card-background);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 30px;
    width: 100%;
    max-width: 1400px; /* Much wider for admin pages */
    position: relative;
    overflow: hidden;
    margin: 20px auto; /* Center the container with some top margin */
}

.container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
}

h1 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 2rem;
    font-weight: 600;
}

.date-info {
    background: linear-gradient(135deg, var(--secondary-color), #64b5f6);
    color: white;
    padding: 15px;
    border-radius: var(--border-radius);
    margin-bottom: 25px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(33, 150, 243, 0.3);
}

.date-info p {
    margin: 5px 0;
    font-weight: 500;
    font-size: 1.1rem;
}

label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-color);
    font-weight: 500;
    font-size: 0.95rem;
}

input, select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background: white;
    margin-bottom: 20px;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

select {
    cursor: pointer;
    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='%23666' 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 15px center;
    background-size: 16px;
    padding-right: 45px;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

button {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.4);
}

button:active {
    transform: translateY(0);
}

#message {
    margin-top: 20px;
    padding: 12px 15px;
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 500;
    transition: var(--transition);
}

.success {
    background-color: #e8f5e8;
    color: var(--success-color);
    border: 1px solid #c8e6c9;
    animation: slideIn 0.5s ease-out;
}

.error {
    background-color: #ffebee;
    color: var(--error-color);
    border: 1px solid #ffcdd2;
    animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Loading state */
button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

button:disabled:hover {
    transform: none;
}

/* Form sections */
.form-section {
    margin-bottom: 25px;
}

.form-section h2 {
    color: var(--secondary-color);
    margin-bottom: 15px;
    font-size: 1.2rem;
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 5px;
}

/* Data Table Styles */
.data-table-container {
    margin-top: 20px;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    background: var(--card-background);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: transparent;
}

.data-table thead {
    background: linear-gradient(135deg, var(--secondary-color), #64b5f6);
    color: white;
}

.data-table th {
    padding: 15px 20px;
    text-align: left;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.2);
    position: sticky;
    top: 0;
    z-index: 10;
}

.data-table td {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.data-table tbody tr {
    transition: var(--transition);
}

.data-table tbody tr:hover {
    background-color: #f8f9fa;
    transform: scale(1.01);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

/* Attendance Sheet Header */
.attendance-sheet-header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.attendance-sheet-header h1 {
    margin: 0 0 10px 0;
    font-size: 2.2rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.attendance-sheet-header h2 {
    margin: 0 0 10px 0;
    font-size: 1.6rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.95;
}

.attendance-sheet-header h3 {
    margin: 0;
    font-size: 1.4rem;
    font-weight: 500;
    letter-spacing: 1px;
    opacity: 0.9;
}

/* Responsive Attendance Header */
@media (max-width: 768px) {
    .attendance-sheet-header {
        padding: 15px;
        margin-bottom: 20px;
    }
    
    .attendance-sheet-header h1 {
        font-size: 1.8rem;
        letter-spacing: 1px;
    }
    
    .attendance-sheet-header h2 {
        font-size: 1.3rem;
    }
    
    .attendance-sheet-header h3 {
        font-size: 1.2rem;
    }
}

/* Admin Navigation */
nav {
    margin-bottom: 30px;
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

nav li {
    flex: 1;
    min-width: 150px;
}

nav a {
    display: block;
    padding: 12px 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(76, 175, 80, 0.2);
}

nav a:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
}

/* Form Styles for Admin */
.admin-form {
    background: #f8f9fa;
    padding: 20px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
}

.admin-form h2 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.3rem;
}

.admin-form input, .admin-form select, .admin-form button {
    margin-bottom: 15px;
}

.admin-form button {
    margin-top: 10px;
    margin-bottom: 0;
}

/* Delete Button */
.delete-btn {
    background: var(--error-color) !important;
    color: white !important;
    border: none !important;
    padding: 8px 16px !important;
    border-radius: 6px !important;
    cursor: pointer !important;
    font-size: 0.9rem !important;
    font-weight: 500 !important;
    transition: var(--transition) !important;
    text-decoration: none !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 6px !important;
    box-shadow: 0 2px 4px rgba(244, 67, 54, 0.2) !important;
}

.delete-btn:hover {
    background: #d32f2f !important;
    transform: translateY(-1px) !important;
    box-shadow: 0 4px 8px rgba(244, 67, 54, 0.3) !important;
}

.delete-btn:active {
    transform: translateY(0) !important;
}

/* Logout Button */
.logout-btn {
    background: var(--accent-color) !important;
    margin-top: 20px;
}

.logout-btn:hover {
    background: #f57c00 !important;
}

/* File Input Styling */
input[type="file"] {
    border: 2px dashed var(--border-color);
    background: white;
    padding: 10px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

input[type="file"]:hover {
    border-color: var(--primary-color);
    background: #f8f9fa;
}

input[type="file"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

/* Textarea Styling */
textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 16px;
    font-family: inherit;
    resize: vertical;
    transition: var(--transition);
    box-sizing: border-box;
}

textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

textarea::placeholder {
    color: var(--text-light);
}

/* Dashboard Styles */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.stat-icon {
    font-size: 2.5rem;
    margin-right: 15px;
    opacity: 0.8;
}

.stat-content h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0 0 5px 0;
}

.stat-content p {
    color: var(--text-light);
    margin: 0;
    font-size: 0.9rem;
    font-weight: 500;
}

.today-highlight {
    background: linear-gradient(135deg, var(--accent-color), #ffb74d);
    color: white;
}

.today-highlight .stat-content h3,
.today-highlight .stat-content p {
    color: white;
}

.quick-actions {
    margin-bottom: 40px;
}

.quick-actions h2 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.actions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.action-card {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 25px;
    text-decoration: none;
    color: var(--text-color);
    display: block;
    transition: var(--transition);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.action-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    text-decoration: none;
    color: var(--text-color);
}

.action-icon {
    font-size: 2rem;
    margin-bottom: 10px;
    display: block;
}

.action-card h3 {
    color: var(--primary-color);
    margin-bottom: 8px;
    font-size: 1.2rem;
}

.action-card p {
    color: var(--text-light);
    margin: 0;
    font-size: 0.9rem;
}

.recent-activity {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 25px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.recent-activity h2 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.recent-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.recent-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.recent-info strong {
    display: block;
    color: var(--text-color);
    font-size: 1rem;
}

.recent-info span {
    color: var(--text-light);
    font-size: 0.85rem;
}

.recent-time {
    color: var(--text-light);
    font-size: 0.85rem;
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    .container {
        padding: 20px;
        margin: 0;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    input, select, button {
        font-size: 16px; /* Prevents zoom on iOS */
    }
}

@media (max-width: 360px) {
    .container {
        padding: 15px;
    }
    
    h1 {
        font-size: 1.6rem;
    }
    
    .date-info {
        padding: 12px;
    }
    
    input, select {
        padding: 10px 12px;
    }
    
    button {
        padding: 12px;
        font-size: 1rem;
    }
}

/* Admin Container Responsive */
@media (max-width: 1440px) {
    .admin-container {
        max-width: 1200px;
        padding: 25px;
        margin: 15px auto;
    }
}

@media (max-width: 1200px) {
    .admin-container {
        max-width: 1000px;
        padding: 20px;
        margin: 10px auto;
    }
}

@media (max-width: 1024px) {
    .admin-container {
        max-width: 95vw;
        padding: 15px;
        margin: 10px auto;
    }
}

@media (max-width: 768px) {
    .admin-container {
        max-width: 100vw;
        padding: 10px;
        border-radius: 0;
        margin: 0;
    }
}

/* Responsive Table */
@media (max-width: 768px) {
    table {
        font-size: 0.9rem;
    }
    
    th, td {
        padding: 8px 10px;
    }
    
    nav ul {
        flex-direction: column;
    }
    
    nav li {
        min-width: auto;
    }
}

/* Responsive Data Table */
@media (max-width: 768px) {
    .data-table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        border-radius: 0;
        width: 100%;
        box-sizing: border-box;
        position: relative;
    }

    .data-table-container::after {
        content: "⟷ Scroll to see all columns";
        position: absolute;
        top: -25px;
        right: 10px;
        font-size: 0.8rem;
        color: var(--text-light);
        background: rgba(255, 255, 255, 0.9);
        padding: 2px 8px;
        border-radius: 4px;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
        pointer-events: none;
    }

    .data-table {
        min-width: 800px;
        font-size: 0.9rem;
    }

    .data-table th,
    .data-table td {
        padding: 12px 15px;
        white-space: nowrap;
        min-width: 60px;
    }

    .data-table th:nth-child(1),
    .data-table td:nth-child(1) {
        min-width: 130px; /* Teacher Name */
    }

    .data-table th:nth-child(2),
    .data-table td:nth-child(2) {
        min-width: 100px; /* Circuit */
    }

    .data-table th:nth-child(3),
    .data-table td:nth-child(3) {
        min-width: 180px; /* School */
    }

    .data-table th:nth-child(4),
    .data-table td:nth-child(4) {
        min-width: 90px; /* Date column */
    }

    .data-table th:nth-child(7),
    .data-table td:nth-child(7) {
        min-width: 100px; /* Timestamp */
    }

    .data-table th:last-child,
    .data-table td:last-child {
        min-width: 120px; /* Actions column with delete button */
        text-align: center;
        background: rgba(244, 67, 54, 0.05);
    }

    .data-table th:last-child {
        background: linear-gradient(135deg, var(--secondary-color), #64b5f6), rgba(244, 67, 54, 0.1);
        font-weight: 700;
        color: white;
        text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
    }
}/* Extra Small Screen Adjustments */
@media (max-width: 480px) {
    .data-table {
        font-size: 0.8rem;
    }

    .data-table th,
    .data-table td {
        padding: 8px 10px;
    }

    .delete-btn {
        padding: 8px 12px !important;
        font-size: 0.85rem !important;
        min-width: 90px !important;
        white-space: nowrap !important;
        background: var(--error-color) !important;
        color: white !important;
        border: none !important;
        border-radius: 6px !important;
        cursor: pointer !important;
        font-weight: 600 !important;
        transition: var(--transition) !important;
        text-decoration: none !important;
        display: inline-flex !important;
        align-items: center !important;
        gap: 6px !important;
        box-shadow: 0 2px 4px rgba(244, 67, 54, 0.2) !important;
    }

    .delete-btn:hover {
        background: #d32f2f !important;
        transform: translateY(-1px) !important;
        box-shadow: 0 4px 8px rgba(244, 67, 54, 0.3) !important;
    }
}

/* Responsive Dashboard */
@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 15px;
    }
    
    .actions-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .stat-card {
        padding: 15px;
    }
    
    .stat-icon {
        font-size: 2rem;
        margin-right: 10px;
    }
    
    .stat-content h3 {
        font-size: 1.5rem;
    }
    
    .recent-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .recent-time {
        align-self: flex-end;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible for keyboard navigation */
button:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    body {
        background: white;
    }
    
    .container {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}