:root {
    /* Primary Colors */
    --primary: #1e90ff;
    --primary-dark: #0066cc;
    --primary-light: #4da6ff;
    
    /* Secondary Colors */
    --secondary: #f5f5f5;
    --secondary-dark: #e0e0e0;
    
    /* Accent Colors */
    --accent: #f39c12;
    --accent-dark: #d68910;
    
    /* Status Colors */
    --success: #27ae60;
    --danger: #ff4d4d;
    --warning: #f39c12;
    --info: #3498db;
    
    /* Neutral Colors */
    --dark: #2c3e50;
    --light: #ecf0f1;
    --white: #ffffff;
    --black: #000000;
    
    /* Text Colors */
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-light: #bdc3c7;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.15);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Skip to main content for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary);
    color: var(--white);
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

.navbar {
    background-color: rgba(44, 62, 80, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

.navbar-brand {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--white) !important;
}

.navbar-brand:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.nav-link {
    color: var(--white) !important;
    margin: 0 var(--spacing-sm);
    transition: var(--transition-fast);
    padding: var(--spacing-sm) var(--spacing-md) !important;
    border-radius: var(--radius-sm);
}

.nav-link:hover,
.nav-link:focus {
    color: var(--accent) !important;
    background-color: rgba(255, 255, 255, 0.1);
}

.nav-link:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Button improvements */
.btn {
    transition: var(--transition-fast);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 500;
}

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

.btn:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

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

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



footer {
    background-color: var(--dark);
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    margin-top: auto;
}

footer h4,
footer h5 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

footer p{
    font-size:0.8rem ;
}


.footer-links a {
    color: var(--white);
    text-decoration: none;
    display: block;
    margin-bottom: var(--spacing-sm);
    transition: var(--transition-fast);
    padding: var(--spacing-xs) 0;
    font-size: 0.8rem;
}

.footer-links a:hover,
.footer-links a:focus {
    color: var(--accent);
    padding-left: var(--spacing-sm);
}

.footer-links a:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    
}

.social-icons a {
    color: var(--white);
    font-size: 1.3rem;
    margin: 0 var(--spacing-sm);
    transition: var(--transition-fast);
    display: inline-block;
    padding: var(--spacing-sm);
    border-radius: 50%;
}

.social-icons a:hover,
.social-icons a:focus {
    color: var(--accent);
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
}

.social-icons a:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Card improvements */
.card {
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    overflow: hidden;
}

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

/* Form improvements */
.form-control:focus,
.form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.2rem rgba(30, 144, 255, 0.25);
    outline: none;
}

.form-label {
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

/* Accessibility improvements */
*:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

button:focus,
a:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Loading spinner */
.spinner {
    border: 3px solid var(--secondary);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

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

/* Responsive Design */
@media (max-width: 992px) {
    .navbar-brand {
        font-size: 1.5rem;
    }
    
    footer .col-md-4,
    footer .col-md-2 {
        margin-bottom: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    .navbar-brand {
        font-size: 1.3rem;
    }
    
    .nav-link {
        margin: 0 var(--spacing-xs);
        font-size: 0.9rem;
        padding: var(--spacing-xs) var(--spacing-sm) !important;
    }
    
    footer {
        padding: var(--spacing-xl) 0 var(--spacing-md);
        text-align: center;
    }
    
    footer .col-md-4,
    footer .col-md-2 {
        margin-bottom: var(--spacing-lg);
    }
    
    #real-time-clock {
        display: none;
    }
    
    .card {
        margin-bottom: var(--spacing-md);
    }
    
    h1 { font-size: 1.7rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.3rem; }
}

@media (max-width: 576px) {
    .navbar-brand {
        font-size: 0.9rem;
    }
    
    .nav-link {
        font-size: 0.85rem;
        padding: var(--spacing-xs) !important;
    }
    
    footer {
        padding: var(--spacing-lg) 0 var(--spacing-sm);
    }
    
    .social-icons a {
        font-size: 1.2rem;
        margin: 0 var(--spacing-xs);
    }
}

/* Print styles */
@media print {
    .navbar,
    footer,
    .btn,
    .no-print {
        display: none !important;
    }
    
    body {
        color: var(--black);
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary: #0000ff;
        --text-primary: #000000;
        --text-secondary: #333333;
    }
    
    .card {
        border: 2px solid var(--text-primary);
    }
}

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