:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --bg-color: #f5f6fa;
    --card-bg: #ffffff;
    --text-color: #2c3e50;
    --border-color: #dcdde1;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Navigation */
.navbar {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    min-height: 44px;
    min-width: 44px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
    padding: 0.5rem;
    display: block;
}

.nav-links a:hover {
    opacity: 0.8;
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
    padding-bottom: 4rem;
}

/* Typography */
h1 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

/* Forms */
.form-container {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    max-width: 800px;
    margin: 0 auto;
}

.form-subtitle {
    color: #7f8c8d;
    margin-bottom: 1.5rem;
    font-style: italic;
}

.registration-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
    font-size: 0.95rem;
}

.form-group input,
.form-group select {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 16px;
    transition: border-color 0.3s;
    min-height: 44px;
    width: 100%;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--secondary-color);
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    min-width: 44px;
    touch-action: manipulation;
}

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

.btn-primary:hover {
    background-color: #2980b9;
}

.btn-secondary {
    background-color: #95a5a6;
    color: white;
}

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

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

.btn-edit {
    background-color: #3498db;
    color: white;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    min-height: 36px;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

/* Messages */
.message {
    padding: 1rem;
    border-radius: 4px;
    margin-top: 1rem;
    display: none;
    font-size: 0.95rem;
}

.message.success {
    display: block;
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    display: block;
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Dashboard & Metrics */
.dashboard-container {
    width: 100%;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.metric-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    border-left: 4px solid;
    transition: transform 0.2s;
}

.metric-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.metric-card:nth-child(1) { border-left-color: #3498db; }
.metric-card:nth-child(2) { border-left-color: #e74c3c; }
.metric-card:nth-child(3) { border-left-color: #27ae60; }
.metric-card:nth-child(4) { border-left-color: #f39c12; }
.metric-card:nth-child(5) { border-left-color: #9b59b6; }
.metric-card:nth-child(6) { border-left-color: #1abc9c; }

.metric-icon {
    font-size: 2rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(0,0,0,0.05);
    flex-shrink: 0;
}

.metric-content h3 {
    font-size: 2rem;
    margin: 0;
    color: #2c3e50;
}

.metric-content p {
    margin: 0;
    color: #7f8c8d;
    font-size: 0.9rem;
}

/* Controls & Filters */
.controls {
    background: var(--card-bg);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.advanced-filters {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    align-items: flex-end;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex: 1;
    min-width: 150px;
}

.filter-group label {
    font-weight: 600;
    color: #555;
    font-size: 0.9rem;
}

.filter-group input,
.filter-group select {
    padding: 0.6rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    min-height: 44px;
}

.search-input, .filter-select {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    min-width: 200px;
}

.filter-actions {
    margin-left: auto;
    display: flex;
    gap: 0.5rem;
}

/* Tables */
.table-container {
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

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

.data-table th {
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
    position: sticky;
    top: 0;
    z-index: 10;
}

.data-table tr:hover {
    background-color: #f8f9fa;
}

.data-table td {
    vertical-align: middle;
}

.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    display: inline-block;
}

.badge-member {
    background-color: #d4edda;
    color: #155724;
}

.badge-non-member {
    background-color: #fff3cd;
    color: #856404;
}

/* Attendance Page Specifics */
.attendance-container {
    max-width: 1200px;
    margin: 0 auto;
}

.date-selector {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.date-selector label {
    font-weight: 600;
    color: #2c3e50;
}

.date-selector input {
    padding: 0.6rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    min-height: 44px;
}

.filters-bar {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    align-items: flex-end;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.search-group {
    flex: 2;
    min-width: 250px;
}

.search-group input {
    width: 100%;
}

.toggle-btn {
    padding: 0.5rem 1.5rem;
    border: 2px solid #ddd;
    background: white;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
    min-width: 120px;
    min-height: 44px;
    font-size: 0.9rem;
    touch-action: manipulation;
}

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

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

.toggle-btn.unmarked {
    background-color: #95a5a6;
    color: white;
    border-color: #95a5a6;
}

.status-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.present-indicator {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 0.5rem;
}

.present-indicator.yes {
    background-color: var(--success-color);
}

.present-indicator.no {
    background-color: var(--danger-color);
}

/* Modal */
.modal {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.modal-content {
    background-color: #fefefe;
    margin: 5% auto;
    padding: 2rem;
    border-radius: 8px;
    width: 90%;
    max-width: 600px;
    position: relative;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    max-height: 90vh;
    overflow-y: auto;
}

.close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 2rem;
    cursor: pointer;
    color: #aaa;
    min-height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close:hover {
    color: #000;
}

/* Print styles */
@media print {
    .navbar, .controls, .btn, .filters-bar, .nav-toggle {
        display: none;
    }
    
    .form-container {
        box-shadow: none;
        border: 1px solid #000;
    }
}

/* ================= MOBILE RESPONSIVE ================= */

@media (max-width: 768px) {
    /* Navigation */
    .nav-toggle {
        display: block;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--primary-color);
        flex-direction: column;
        padding: 1rem;
        gap: 0;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-links li {
        width: 100%;
    }
    
    .nav-links a {
        padding: 1rem;
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    
    /* Container */
    .container {
        margin: 1rem auto;
        padding: 0 0.75rem;
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    /* Forms */
    .form-container {
        padding: 1.5rem 1rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions .btn {
        width: 100%;
    }
    
    /* Metrics */
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .metric-card {
        padding: 1rem;
        flex-direction: column;
        text-align: center;
    }
    
    .metric-icon {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
    }
    
    .metric-content h3 {
        font-size: 1.5rem;
    }
    
    /* Filters */
    .advanced-filters,
    .filters-bar {
        flex-direction: column;
        align-items: stretch;
        padding: 1rem;
    }
    
    .filter-group {
        width: 100%;
        min-width: unset;
    }
    
    .filter-group input,
    .filter-group select {
        width: 100%;
    }
    
    .search-group {
        min-width: unset;
    }
    
    .filter-actions {
        margin-left: 0;
        width: 100%;
        flex-direction: column;
    }
    
    .filter-actions button {
        width: 100%;
    }
    
    /* Table */
    .data-table {
        font-size: 0.9rem;
    }
    
    .data-table th,
    .data-table td {
        padding: 0.75rem 0.5rem;
    }
    
    /* Modal */
    .modal-content {
        width: 95%;
        margin: 2% auto;
        padding: 1.5rem 1rem;
    }
    
    /* Attendance specific */
    .date-selector {
        flex-direction: column;
        align-items: stretch;
    }
    
    .date-selector input {
        width: 100%;
    }
}

@media (max-width: 480px) {
    /* Single column metrics on very small screens */
    .metrics-grid {
        grid-template-columns: 1fr;
    }
    
    .metric-card {
        flex-direction: row;
        text-align: left;
    }
    
    .metric-icon {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
    
    /* Smaller buttons */
    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
    
    .toggle-btn {
        min-width: 100px;
        padding: 0.4rem 1rem;
    }
}