/* CSS Reset and Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #ffffff;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    transition: background-image 0.5s ease-in-out;
}

main {
    flex: 1;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    background: linear-gradient(
        135deg,
        rgba(0, 0, 0, 0.4) 0%,
        rgba(0, 0, 0, 0.6) 100%
    );
    backdrop-filter: blur(15px) saturate(1.2);
    border-radius: 0;
    min-height: 100vh;
    justify-content: center;
    align-items: center;
}

/* Desktop optimizations */
@media (min-width: 768px) {
    main {
        padding: 1.5rem 2rem;
        gap: 1.25rem;
        justify-content: flex-start;
        padding-top: 2rem;
        padding-bottom: 1rem;
    }
}

.sunny {
    background-image: 
        linear-gradient(rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.3)),
        url("https://images.pexels.com/photos/585759/pexels-photo-585759.jpeg");
}

.cloudy {
    background-image: 
        linear-gradient(rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.3)),
        url("https://cdn.pixabay.com/photo/2019/06/07/17/37/clouds-4258726_1280.jpg");
}

/* Accessibility - Screen Reader Only Content */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Skip to content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: #000;
    color: #fff;
    padding: 8px;
    text-decoration: none;
    z-index: 9999;
    border-radius: 4px;
}

.skip-link:focus {
    top: 6px;
}

/* Header Styles */
.app-header {
    text-align: center;
    margin-bottom: 0.75rem;
}

.app-header h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin: 0 0 0.25rem 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    letter-spacing: -0.02em;
}

.app-description {
    font-size: 1rem;
    font-weight: 300;
    margin: 0;
    opacity: 0.9;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.7);
}

.loading-indicator {
    font-size: 0.9rem;
    font-weight: 400;
    margin: 0.25rem 0 0 0;
    opacity: 0.8;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.7);
    font-style: italic;
    color: rgba(255, 255, 255, 0.9);
}

/* Desktop header optimizations */
@media (min-width: 768px) {
    .app-header {
        margin-bottom: 0.5rem;
    }
    
    .app-header h1 {
        font-size: 2.5rem;
        margin: 0 0 0.125rem 0;
    }
    
    .app-description {
        font-size: 0.95rem;
    }
}

/* Search Section */
.search-section {
    width: 100%;
    max-width: 500px;
}

.search-form {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.search-container {
    position: relative;
}

.search-label {
    display: block;
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 0.375rem;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.7);
}

/* Desktop search optimizations */
@media (min-width: 768px) {
    .search-form {
        gap: 0.625rem;
    }
    
    .search-label {
        font-size: 0.9rem;
        margin-bottom: 0.25rem;
    }
}

.search-input {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    font-family: inherit;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.search-input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.search-input:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

.search-button {
    width: 100%;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.1));
    color: #ffffff;
    cursor: pointer;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

/* Desktop search input optimizations */
@media (min-width: 768px) {
    .search-input {
        padding: 0.75rem 1rem;
        font-size: 0.95rem;
    }
    
    .search-button {
        padding: 0.75rem 1.25rem;
        font-size: 0.95rem;
    }
}

.search-button:hover {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.2));
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.search-button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
}

.search-button:active {
    transform: translateY(0);
}











/* Search Results Dropdown */
.search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-top: none;
    border-radius: 0 0 12px 12px;
    max-height: 200px;
    overflow-y: auto;
    padding: 0;
    margin: 0;
    list-style: none;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.search-results[hidden] {
    display: none;
}

.search-results li {
    padding: 0.75rem 1.25rem;
    color: #1f2937;
    cursor: pointer;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    transition: background-color 0.2s ease;
    font-weight: 500;
}

.search-results li:last-child {
    border-bottom: none;
}

.search-results li:hover,
.search-results li:focus {
    background: rgba(59, 130, 246, 0.1);
    color: #1e40af;
}

.search-results li[aria-selected="true"] {
    background: rgba(59, 130, 246, 0.2);
    color: #1e40af;
}

/* Weather Section */
.weather-section {
    width: 100%;
    max-width: 600px;
}

.weather-container {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
    border-radius: 20px;
    padding: 1.5rem;
    border: 2px solid rgba(255, 255, 255, 0.2);
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

/* Desktop weather container optimizations */
@media (min-width: 768px) {
    .weather-container {
        padding: 1.25rem;
    }
}

.weather-header {
    margin-bottom: 1.25rem;
}

/* Desktop weather header optimizations */
@media (min-width: 768px) {
    .weather-header {
        margin-bottom: 1rem;
    }
}

.city-name {
    font-size: clamp(1.375rem, 3.5vw, 2.25rem);
    font-weight: 600;
    margin: 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    letter-spacing: -0.01em;
}

.postal-codes {
    font-size: 0.875rem;
    font-weight: 400;
    margin: 0.125rem 0 0 0;
    opacity: 0.9;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
    font-style: italic;
}

/* Desktop city name and postal codes optimizations */
@media (min-width: 768px) {
    .city-name {
        font-size: clamp(1.25rem, 3vw, 2rem);
    }
    
    .postal-codes {
        font-size: 0.8rem;
        margin: 0.1rem 0 0 0;
    }
}

.weather-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.875rem;
    margin-bottom: 1.5rem;
}

.weather-icon {
    width: clamp(100px, 18vw, 140px);
    height: clamp(100px, 18vw, 140px);
    border-radius: 16px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

.weather-icon:hover {
    transform: scale(1.05);
}

.weather-condition {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    font-weight: 500;
    margin: 0;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.weather-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 1rem;
    margin: 0;
    padding: 0;
}

/* Desktop weather visual and stats optimizations */
@media (min-width: 768px) {
    .weather-visual {
        gap: 0.75rem;
        margin-bottom: 1.25rem;
    }
    
    .weather-icon {
        width: clamp(90px, 15vw, 120px);
        height: clamp(90px, 15vw, 120px);
    }
    
    .weather-condition {
        font-size: clamp(1rem, 2vw, 1.25rem);
    }
    
    .weather-stats {
        gap: 0.875rem;
        grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
    }
}

.weather-detail {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
}

/* Desktop weather detail optimizations */
@media (min-width: 768px) {
    .weather-detail {
        padding: 0.875rem;
        gap: 0.25rem;
    }
}

.detail-label {
    font-size: 0.8rem;
    font-weight: 500;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0;
}

/* Desktop detail label optimizations */
@media (min-width: 768px) {
    .detail-label {
        font-size: 0.75rem;
    }
}

.detail-value {
    font-size: 1.375rem;
    font-weight: 700;
    margin: 0;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
    white-space: nowrap;
}

/* Desktop detail value optimizations */
@media (min-width: 768px) {
    .detail-value {
        font-size: 1.25rem;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    main {
        padding: 1rem;
        gap: 1.5rem;
    }
    
    .weather-container {
        padding: 1.5rem;
    }
    
    .weather-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    main {
        padding: 0.75rem;
    }
    
    .weather-container {
        padding: 1rem;
        border-radius: 16px;
    }
    
    .search-input,
    .search-button {
        padding: 0.875rem 1rem;
        font-size: 1rem;
    }
}

/* Focus indicators for better accessibility */
*:focus-visible {
    outline: 2px solid rgba(255, 255, 255, 0.8);
    outline-offset: 2px;
}

/* Loading state */
.search-button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none !important;
}

.search-button:disabled:hover {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.1));
    transform: none;
}

/* Loading States */
.loading-state {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
}

.loading-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top: 4px solid rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-text {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 500;
    margin: 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.loading-subtext {
    font-size: 1rem;
    font-weight: 300;
    margin: 0;
    opacity: 0.8;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

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

/* Smooth transitions for showing/hiding weather data */
.weather-container {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.weather-container[hidden] {
    display: none !important;
}

.weather-container.fade-in {
    animation: fadeInUp 0.5s ease forwards;
}

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

/* Animation for smooth transitions */
@media (prefers-reduced-motion: no-preference) {
    .search-input,
    .search-button {
        transition: all 0.3s ease;
    }
    
    .weather-icon {
        transition: transform 0.3s ease, opacity 0.3s ease;
    }
    
    body {
        transition: background-image 0.8s ease-in-out;
    }
    
    body.background-loaded {
        transition: background-image 0.8s ease-in-out;
    }
}

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    .loading-spinner {
        animation: none;
        border: 4px solid rgba(255, 255, 255, 0.5);
    }
    
    .weather-container.fade-in {
        animation: none;
    }
    
    * {
        transition: none !important;
    }
}