:root {
    --primary: #4361ee;
    --secondary: #3f37c9;
    --accent: #4895ef;
    --light: #f8f9fa;
    --dark: #212529;
    --success: #4cc9f0;
    --warning: #f72585;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    color: var(--dark);
    min-height: 100vh;
}

.app-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.app-header {
    text-align: center;
    margin-bottom: 30px;
    animation: fadeIn 0.8s ease-in-out;
}

.app-header h1 {
    font-size: 2.5rem;
    color: var(--secondary);
    margin-bottom: 5px;
}

.weather-emoji {
    font-size: 1.5em;
    vertical-align: middle;
}

.subtitle {
    color: #6c757d;
    font-size: 1.1rem;
}

.city-selector {
    margin-bottom: 25px;
}

.city-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
}

.city-tab {
    padding: 12px 20px;
    background-color: white;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    color: var(--dark);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.city-tab:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
}

.city-tab.active {
    background-color: var(--primary);
    color: white;
}

.city-tab i {
    font-size: 1rem;
}

.weather-container {
    background-color: white;
    border-radius: 20px;
    padding: 25px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.current-weather-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.weather-main {
    display: flex;
    justify-content: space-between;
    width: 100%;
    align-items: center;
    margin-bottom: 15px;
}

.location h2 {
    font-size: 1.8rem;
    color: var(--secondary);
}

.date {
    color: #6c757d;
    font-size: 0.9rem;
}

.weather-icon {
    width: 80px;
    height: 80px;
    object-fit: contain;
}

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

.temperature {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 5px;
}

.description {
    font-size: 1.2rem;
    color: #6c757d;
    text-transform: capitalize;
}

.weather-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
    margin-bottom: 30px;
}

.stat-card {
    background-color: #f8f9fa;
    border-radius: 12px;
    padding: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.stat-card i {
    font-size: 1.5rem;
    color: var(--accent);
}

.stat-value {
    font-size: 1.3rem;
    font-weight: 600;
    display: block;
}

.stat-label {
    font-size: 0.8rem;
    color: #6c757d;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.forecast-section {
    margin-top: 20px;
}

.forecast-section h3 {
    margin-bottom: 15px;
    color: var(--secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.forecast-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 15px;
}

.forecast-card {
    background-color: #f8f9fa;
    border-radius: 12px;
    padding: 15px;
    text-align: center;
    transition: transform 0.3s ease;
}

.forecast-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.forecast-day {
    font-weight: 600;
    margin-bottom: 5px;
}

.forecast-icon {
    width: 50px;
    height: 50px;
    margin: 5px auto;
}

.forecast-temp {
    font-weight: 600;
    color: var(--primary);
}

.forecast-desc {
    font-size: 0.8rem;
    color: #6c757d;
    margin-top: 5px;
    text-transform: capitalize;
}

.app-footer {
    text-align: center;
    color: #6c757d;
    font-size: 0.9rem;
    padding: 15px;
}

.app-footer i {
    color: var(--warning);
}

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

/* Responsive adjustments */
@media (max-width: 600px) {
    .app-header h1 {
        font-size: 2rem;
    }
    
    .city-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .city-tab {
        width: 100%;
        justify-content: center;
    }
    
    .weather-stats {
        grid-template-columns: 1fr;
    }
}


/* SEO and Accessibility Improvements */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.footer-links {
    margin-top: 10px;
    font-size: 0.9rem;
}

.footer-links a {
    color: var(--primary);
    text-decoration: none;
}

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

/* Print styles */
@media print {
    .city-tabs, .app-footer {
        display: none;
    }
    
    .weather-container {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}