/* ========================================
   Meal Management System - Modern CSS
   Mobile-First Responsive Design
======================================== */

/* ===== CSS Variables ===== */
:root {
    --primary-color: #4CAF50;
    --secondary-color: #2196F3;
    --danger-color: #f44336;
    --warning-color: #ff9800;
    --success-color: #4CAF50;
    --dark-color: #333;
    --light-color: #f5f5f5;
    --white: #ffffff;
    --border-color: #ddd;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 20px rgba(0,0,0,0.15);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

/* ===== Global Reset ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    font-weight: 600;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }

/* ===== Container ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* ===== Header ===== */
.main-header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.main-nav {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.main-nav a {
    color: var(--dark-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
}

.main-nav a:hover {
    background: var(--light-color);
    color: var(--primary-color);
}

.main-nav a.active {
    background: var(--primary-color) !important;
    color: white !important;
    font-weight: 600 !important;
}

.logout-btn {
    color: var(--danger-color) !important;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--dark-color);
    border-radius: 3px;
    transition: var(--transition);
}

/* ===== Footer ===== */
.main-footer {
    background: var(--white);
    margin-top: 3rem;
    padding: 2rem 0;
    text-align: center;
    box-shadow: var(--shadow);
}

.footer-container p {
    margin: 0.5rem 0;
    color: #666;
}

/* ===== Login Page ===== */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

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

.login-box {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-header h1 {
    color: var(--primary-color);
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.login-footer {
    margin-top: 1.5rem;
    text-align: center;
    font-size: 0.9rem;
    color: #666;
}

/* ===== Dashboard ===== */
.dashboard {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.period-info {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    text-align: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.stat-icon {
    font-size: 2.5rem;
}

.stat-info h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin: 0;
}

.stat-info p {
    color: #666;
    margin: 0;
}

/* ===== Quick Actions ===== */
.quick-actions {
    margin-top: 2rem;
}

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

.action-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.action-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

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

.action-card h3 {
    margin-bottom: 0.5rem;
}

.action-card p {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* ===== Page Header ===== */
.page-header {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    text-align: center;
}

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

.btn-primary:hover {
    background: #45a049;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

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

.btn-secondary:hover {
    background: #1976D2;
    transform: translateY(-2px);
}

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

.btn-danger:hover {
    background: #d32f2f;
}

.btn-block {
    width: 100%;
    display: block;
}

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

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

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

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

/* ===== Alerts ===== */
.alert {
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 2px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 2px solid #f5c6cb;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 2px solid #ffeaa7;
}

/* ===== Members Grid ===== */
.members-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.member-card {
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    text-align: center;
    transition: var(--transition);
}

.member-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.member-card.inactive {
    opacity: 0.6;
    background: #f5f5f5;
}

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

.member-card h3 {
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

.member-card p {
    margin: 0.25rem 0;
    color: #666;
    font-size: 0.9rem;
}

.member-status {
    margin: 1rem 0;
    font-weight: 600;
}

.member-actions {
    margin-top: 1rem;
    display: flex;
    gap: 0.5rem;
    justify-content: center;
}

/* ===== Periods List ===== */
.periods-list {
    display: grid;
    gap: 1.5rem;
}

.period-card {
    background: var(--white);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    transition: var(--transition);
}

.period-card.active {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.period-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.period-details p {
    margin: 0.5rem 0;
    color: #666;
}

/* ===== Meals Page ===== */
.date-selector {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.date-selector label {
    font-weight: 600;
}

.date-selector input {
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.meals-form {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.meals-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.meal-card {
    background: var(--light-color);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
}

.meal-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.meal-header h3 {
    margin: 0;
    font-size: 1rem;
}

.meal-counter {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.counter-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: var(--primary-color);
    color: var(--white);
    font-size: 1.5rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.counter-btn:hover {
    background: #45a049;
    transform: scale(1.1);
}

.meal-input {
    width: 60px;
    text-align: center;
    padding: 0.5rem;
    font-size: 1.2rem;
    font-weight: bold;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
}

.form-actions {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
}

.quick-actions-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1rem;
    flex-wrap: wrap;
}

/* ===== Expenses Table ===== */
.expense-summary {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    text-align: center;
}

.expenses-table {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow-x: auto;
}

.expenses-table table {
    width: 100%;
    border-collapse: collapse;
}

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

.expenses-table th {
    background: var(--primary-color);
    color: var(--white);
    font-weight: 600;
}

.expenses-table tr:hover {
    background: var(--light-color);
}

.expenses-table .amount {
    font-weight: 600;
    color: var(--primary-color);
}

.expenses-table .actions {
    display: flex;
    gap: 0.5rem;
}

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

/* ===== Settlements ===== */
.period-summary {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    margin-bottom: 2rem;
}

.summary-card h3 {
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.summary-item {
    display: flex;
    justify-content: space-between;
    padding: 1rem;
    background: var(--light-color);
    border-radius: var(--border-radius);
}

.settlements-container {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    margin-bottom: 2rem;
}

.settlements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.settlement-card {
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    transition: var(--transition);
}

.settlement-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.settlement-card.credit {
    border-color: var(--success-color);
    background: #e8f5e9;
}

.settlement-card.due {
    border-color: var(--danger-color);
    background: #ffebee;
}

.settlement-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.settlement-details {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.detail-row span {
    color: #666;
}

.balance-row {
    margin-top: 0.5rem;
    padding-top: 0.75rem;
    border-top: 2px solid var(--border-color);
}

.balance-amount {
    font-size: 1.3rem;
    font-weight: bold;
}

.balance-amount.credit {
    color: var(--success-color);
}

.balance-amount.due {
    color: var(--danger-color);
}

.status-label {
    font-size: 0.8rem;
    font-weight: normal;
}

/* ===== Badges ===== */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

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

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

.badge-secondary {
    background: #999;
    color: var(--white);
}

/* ===== Action Buttons ===== */
.action-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
    flex-wrap: wrap;
}

/* ===== Modal ===== */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.modal-content {
    background: var(--white);
    border-radius: var(--border-radius);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 2px solid var(--border-color);
}

.modal-header h2 {
    margin: 0;
}

.close {
    font-size: 2rem;
    font-weight: bold;
    color: #999;
    cursor: pointer;
    transition: var(--transition);
}

.close:hover {
    color: var(--dark-color);
}

.modal-content form {
    padding: 1.5rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1.5rem;
}

/* ===== Member Selection Styling ===== */
.members-selection-box {
    max-height: 300px;
    overflow-y: auto;
    border: 2px solid var(--border-color);
    padding: 15px;
    border-radius: var(--border-radius);
    background: #f8f9fa;
}

.member-checkbox-item {
    padding: 10px;
    margin: 5px 0;
    background: white;
    border-radius: 5px;
    border: 1px solid #e0e0e0;
    transition: all 0.2s ease;
    cursor: pointer;
}

.member-checkbox-item:hover {
    background: #e3f2fd;
    border-color: var(--primary-color);
}

.member-checkbox-item label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-weight: normal !important;
    margin: 0;
}

.member-checkbox-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-right: 10px;
    cursor: pointer;
}

.select-all-item {
    padding: 10px;
    margin: 5px 0;
    background: white;
    border-radius: 5px;
    border: 2px solid var(--primary-color);
    transition: all 0.2s ease;
    cursor: pointer;
    font-weight: bold;
}

.select-all-item:hover {
    background: #e3f2fd;
    border-color: var(--primary-color);
}

.select-all-item label {
    display: flex;
    align-items: center;
    cursor: pointer;
    color: var(--dark-color) !important;
    margin: 0;
}

.select-all-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-right: 10px;
    cursor: pointer;
}

.member-count-badge {
    display: inline-block;
    background: var(--success-color);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.85rem;
    margin-left: 10px;
}

/* ===== Report Page ===== */
.report-actions {
    display: flex;
    gap: 1rem;
}

.report-container {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    margin-bottom: 2rem;
}

.report-header {
    text-align: center;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 2rem;
}

.report-date {
    color: #666;
    font-size: 0.9rem;
}

.report-section {
    margin-bottom: 3rem;
}

.report-section h3 {
    color: var(--primary-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

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

.stat-item {
    display: flex;
    justify-content: space-between;
    padding: 1rem;
    background: var(--light-color);
    border-radius: var(--border-radius);
}

.report-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

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

.report-table th {
    background: var(--primary-color);
    color: var(--white);
    font-weight: 600;
}

.report-table tr:nth-child(even) {
    background: var(--light-color);
}

.report-table .credit {
    color: var(--success-color);
    font-weight: 600;
}

.report-table .due {
    color: var(--danger-color);
    font-weight: 600;
}

.meals-summary {
    display: grid;
    gap: 1.5rem;
}

.date-meals {
    background: var(--light-color);
    padding: 1rem;
    border-radius: var(--border-radius);
}

.date-meals h4 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.meals-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.meal-badge {
    background: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
}

.share-section {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 2rem;
}

.share-section h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.share-section ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.share-section li {
    margin-bottom: 0.5rem;
}

/* ===== Public View ===== */
.public-view {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.public-header {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

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

.settlements-section {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.public-footer {
    text-align: center;
    padding: 2rem;
    color: var(--white);
    margin-top: 2rem;
}

/* ===== Print Styles ===== */
@media print {
    body {
        background: white;
    }
    
    .main-header,
    .main-footer,
    .page-header,
    .report-actions,
    .action-buttons,
    .share-section {
        display: none !important;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
    }
    
    .report-container {
        box-shadow: none;
        padding: 0;
    }
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    /* Mobile Navigation */
    .mobile-menu-toggle {
        display: flex;
    }
    
    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow);
    }
    
    .main-nav.active {
        display: flex;
    }
    
    .main-nav a {
        width: 100%;
        text-align: center;
        padding: 1rem;
    }
    
    /* Adjust grids for mobile */
    .stats-grid,
    .action-grid,
    .members-grid,
    .meals-grid,
    .settlements-grid {
        grid-template-columns: 1fr;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    /* Tables responsive */
    .expenses-table {
        overflow-x: auto;
    }
    
    .expenses-table table {
        min-width: 600px;
    }
    
    /* Form adjustments */
    .form-row {
        grid-template-columns: 1fr;
    }
    
    /* Modal adjustments */
    .modal {
        padding: 10px;
    }
    
    /* Report responsive */
    .report-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .report-actions .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.3rem; }
    h3 { font-size: 1.1rem; }
    
    .container {
        padding: 10px;
    }
    
    .stat-card,
    .member-card,
    .meal-card {
        padding: 1rem;
    }
    
    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
}

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

.dashboard,
.page-header,
.stat-card,
.action-card,
.member-card,
.settlement-card {
    animation: fadeIn 0.5s ease;
}

/* ===== Scrollbar Styling ===== */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--light-color);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #45a049;
}