:root {
    --primary-blue: #003366;
    --primary-orange: #FF6600;
    --secondary-blue: #004488;
    --light-blue: #f0f5ff;
    --white: #ffffff;
    --gray: #f5f5f5;
    --dark-gray: #333333;
    --border-color: #dddddd;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 5px 15px rgba(0, 0, 0, 0.1);
    --green: #28a745;
    --red: #dc3545;
    --yellow: #ffc107;
}

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

html {
    font-size: 16px;
}

body {
    background-color: #f8f9fa;
    color: var(--dark-gray);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
    width: 100%;
}

/* Header Styles */
header {
    background: var(--primary-blue);
    color: white;
    padding: 15px 0;
    box-shadow: var(--shadow);
    position: relative;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo {
    font-size: 28px;
    font-weight: bold;
}

.logo span {
    color: var(--primary-orange);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.user-avatar {
    width: 40px;
    height: 40px;
    background: var(--primary-orange);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: white;
    flex-shrink: 0;
}

/* Navigation */
nav {
    background: var(--secondary-blue);
    padding: 0;
    position: relative;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    flex-wrap: wrap;
}

.nav-menu li {
    margin: 0;
    flex: 1 0 auto;
}

.nav-menu a {
    display: block;
    padding: 15px 20px;
    color: white;
    text-decoration: none;
    transition: all 0.3s;
    border-bottom: 3px solid transparent;
    text-align: center;
    white-space: nowrap;
}

.nav-menu a:hover,
.nav-menu a.active {
    background: var(--primary-orange);
    border-bottom-color: white;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
    padding: 10px;
    width: 100%;
    text-align: left;
}

/* Main Content */
.main-content {
    padding: 30px 0;
    min-height: calc(100vh - 200px);
    width: 100%;
}

.page-header {
    text-align: center;
    margin-bottom: 30px;
    padding: 0 10px;
}

.page-header h1 {
    color: var(--primary-blue);
    margin-bottom: 10px;
    font-size: clamp(1.8rem, 4vw, 2.5rem);
}

.page-header p {
    color: #666;
    font-size: clamp(0.9rem, 2vw, 1.1rem);
}

/* Cards and Widgets */
.card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow);
    margin-bottom: 25px;
    transition: transform 0.3s, box-shadow 0.3s;
    width: 100%;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.admin-section {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 25px;
    width: 100%;
}

.section-title {
    color: var(--primary-blue);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--light-blue);
    font-size: clamp(1.2rem, 3vw, 1.5rem);
}

/* Grid Systems */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
    width: 100%;
}

.dashboard-widgets {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 30px 0;
    width: 100%;
}

.widget {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s;
    width: 100%;
}

.widget:hover {
    transform: translateY(-3px);
}

.widget-icon {
    font-size: clamp(32px, 8vw, 40px);
    margin-bottom: 15px;
}

.widget-title {
    font-size: clamp(12px, 2.5vw, 14px);
    color: #666;
    margin-bottom: 10px;
}

.widget-value {
    font-size: clamp(18px, 4vw, 24px);
    font-weight: bold;
    color: var(--primary-blue);
}

.widget-value.orange { color: var(--primary-orange); }
.widget-value.green { color: var(--green); }

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: clamp(14px, 3vw, 16px);
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    transition: all 0.3s;
    margin: 5px;
    min-width: 120px;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 14px;
    min-width: 80px;
}

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

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

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

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

.btn-disabled {
    background: #ccc;
    color: #666;
    cursor: not-allowed;
}

.btn:hover:not(.btn-disabled) {
    opacity: 0.9;
    transform: translateY(-1px);
}

/* Forms */
.form-group {
    margin-bottom: 20px;
    width: 100%;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark-gray);
    font-size: clamp(14px, 3vw, 16px);
}

input, select, textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 16px;
    transition: border-color 0.3s;
    max-width: 100%;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

/* Alerts */
.alert {
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 20px;
    font-weight: 500;
    width: 100%;
}

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

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

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

/* Tables */
.table-container {
    overflow-x: auto;
    margin: 20px 0;
    width: 100%;
    -webkit-overflow-scrolling: touch;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    min-width: 600px;
}

.data-table th,
.data-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    font-size: clamp(12px, 2.5vw, 14px);
}

.data-table th {
    background: var(--light-blue);
    color: var(--primary-blue);
    font-weight: 600;
}

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

/* Footer */
footer {
    background: var(--primary-blue);
    color: white;
    padding: 30px 0;
    margin-top: 50px;
    width: 100%;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.social-links a {
    color: white;
    text-decoration: none;
    margin-left: 15px;
    font-size: clamp(14px, 3vw, 16px);
}

.social-links a:hover {
    text-decoration: underline;
}

/* Enhanced Dashboard Styles for Mobile */
.quick-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
    width: 100%;
}

.stat-card {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-align: center;
    width: 100%;
}

.stat-value {
    font-size: clamp(18px, 5vw, 24px);
    font-weight: bold;
    color: #003366;
    margin: 10px 0;
}

.stat-label {
    font-size: clamp(12px, 3vw, 14px);
    color: #666;
}

.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
    margin: 20px 0;
    width: 100%;
}

.menu-item {
    background: white;
    padding: 15px;
    text-align: center;
    border-radius: 8px;
    text-decoration: none;
    color: #333;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100px;
}

.menu-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
    text-decoration: none;
    color: #333;
}

.menu-icon-large {
    font-size: clamp(24px, 8vw, 32px);
    margin-bottom: 10px;
    display: block;
}

/* Enhanced Responsive Design */
@media (max-width: 1200px) {
    .container {
        padding: 0 20px;
    }
}

@media (max-width: 992px) {
    .nav-menu {
        flex-direction: column;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid,
    .dashboard-widgets {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-menu {
        display: none;
        flex-direction: column;
        width: 100%;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .main-content {
        padding: 15px 0;
    }
    
    .card,
    .admin-section {
        padding: 20px;
    }
    
    .stats-grid,
    .dashboard-widgets {
        grid-template-columns: 1fr 1fr;
        gap: 15px;
    }
    
    .quick-stats {
        grid-template-columns: 1fr 1fr;
    }
    
    .menu-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }
    
    .footer-content {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .social-links {
        margin-top: 10px;
    }
    
    .social-links a {
        margin: 0 8px;
    }
    
    .btn {
        width: 100%;
        margin: 5px 0;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    .main-content {
        padding: 10px 0;
    }
    
    .card,
    .admin-section {
        padding: 15px;
    }
    
    .stats-grid,
    .dashboard-widgets {
        grid-template-columns: 1fr;
    }
    
    .quick-stats {
        grid-template-columns: 1fr;
    }
    
    .menu-grid {
        grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
        gap: 10px;
    }
    
    .menu-item {
        padding: 10px;
        min-height: 80px;
    }
    
    .widget {
        padding: 20px;
    }
    
    .data-table th,
    .data-table td {
        padding: 8px 10px;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 10px;
    }
    
    .menu-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .btn {
        padding: 10px 20px;
    }
    
    .page-header h1 {
        font-size: 1.5rem;
    }
    
    .widget-value {
        font-size: 20px;
    }
}

/* Very small devices */
@media (max-width: 360px) {
    .menu-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .menu-item {
        min-height: 70px;
        padding: 8px;
    }
    
    .menu-icon-large {
        font-size: 20px;
    }
    
    .stat-card {
        padding: 15px;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

.slide-up {
    animation: slideUp 0.5s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { 
        opacity: 0;
        transform: translateY(20px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}

/* Loading Spinner */
.spinner {
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--primary-blue);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

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

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }
.p-1 { padding: 10px; }
.p-2 { padding: 20px; }
.p-3 { padding: 30px; }
.w-100 { width: 100%; }
.h-100 { height: 100%; }

/* Flexbox Utilities */
.d-flex { display: flex; }
.flex-column { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.align-start { align-items: flex-start; }

/* Grid Utilities */
.d-grid { display: grid; }
.gap-1 { gap: 10px; }
.gap-2 { gap: 20px; }
.gap-3 { gap: 30px; }

/* Touch device improvements */
@media (hover: none) and (pointer: coarse) {
    .btn:hover {
        transform: none;
    }
    
    .card:hover {
        transform: none;
    }
    
    .widget:hover {
        transform: none;
    }
    
    .menu-item:hover {
        transform: none;
    }
    
    /* Increase tap target sizes for mobile */
    .btn {
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .nav-menu a {
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .menu-item {
        min-height: 44px;
    }
}