:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-light: #718096;
    --background-primary: #f7fafc;
    --background-secondary: #edf2f7;
    --white: #ffffff;
    --shadow-light: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-large: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --border-radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header Styles */
.header {
    text-align: center;
    margin-bottom: 2rem;
    color: white;
}

.site-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.site-title i {
    margin-right: 0.5rem;
    color: var(--accent-color);
}

.site-subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    font-weight: 300;
}

/* Search Styles */
.search-container {
    position: relative;
    margin-bottom: 2rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    transition: var(--transition);
}

.search-box:hover {
    box-shadow: var(--shadow-large);
    background: rgba(255, 255, 255, 0.98);
}

.search-icon {
    position: absolute;
    left: 1rem;
    color: var(--text-light);
    font-size: 1.1rem;
    z-index: 2;
}

#cityInput {
    flex: 1;
    padding: 1rem 1rem 1rem 3rem;
    border: none;
    background: transparent;
    font-size: 1rem;
    outline: none;
    border-radius: var(--border-radius);
    color: var(--text-primary);
}

#cityInput::placeholder {
    color: var(--text-light);
}

.search-btn {
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

.search-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    z-index: 10;
    max-height: 200px;
    overflow-y: auto;
    display: none;
}

.suggestion-item {
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.suggestion-item:hover {
    background: rgba(0, 0, 0, 0.05);
}

.suggestion-item:last-child {
    border-bottom: none;
}

/* Loading and Error States */
.loading, .error-message {
    text-align: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    margin-bottom: 2rem;
    display: none;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(102, 126, 234, 0.1);
    border-left: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

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

.error-message {
    color: #e53e3e;
}

.error-message i {
    font-size: 2rem;
    margin-bottom: 1rem;
}

/* Weather Content */
.weather-content {
    flex: 1;
    display: none;
}

.current-weather {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-medium);
    transition: var(--transition);
}

.current-weather:hover {
    box-shadow: var(--shadow-large);
}

.weather-main {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2rem;
}

.location-info h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.location-info p {
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.temperature-display {
    text-align: right;
}

.temp-main {
    font-size: 4rem;
    font-weight: 300;
    color: var(--primary-color);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.temp-unit {
    font-size: 2rem;
    opacity: 0.7;
}

.unit-toggle {
    margin-top: 0.5rem;
}

.unit-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.unit-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.weather-details {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 2rem;
    align-items: start;
}

.weather-icon-section {
    text-align: center;
}

.weather-icon-container {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    box-shadow: var(--shadow-medium);
}

.weather-icon {
    font-size: 2.5rem;
    color: white;
}

#weatherDescription {
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: capitalize;
}

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

.stat-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: rgba(102, 126, 234, 0.05);
    border-radius: 12px;
    transition: var(--transition);
}

.stat-item:hover {
    background: rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
}

.stat-item i {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-right: 0.75rem;
    width: 20px;
    text-align: center;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-light);
    font-weight: 500;
}

.stat-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Forecast Section */
.forecast-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-medium);
    transition: var(--transition);
}

.forecast-section:hover {
    box-shadow: var(--shadow-large);
}

.section-title {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.section-title i {
    margin-right: 0.5rem;
    color: var(--primary-color);
}

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

.forecast-item {
    background: rgba(102, 126, 234, 0.05);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.forecast-item:hover {
    background: rgba(102, 126, 234, 0.1);
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.forecast-day {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.forecast-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin: 0.5rem 0;
}

.forecast-temps {
    display: flex;
    justify-content: space-between;
    margin-top: 0.5rem;
}

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

.forecast-low {
    color: var(--text-light);
}

.forecast-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    text-transform: capitalize;
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 2rem;
    padding: 1rem;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .site-title {
        font-size: 2rem;
    }
    
    .weather-main {
        flex-direction: column;
        gap: 1rem;
    }
    
    .temperature-display {
        text-align: left;
    }
    
    .temp-main {
        font-size: 3rem;
    }
    
    .weather-details {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .weather-icon-container {
        width: 80px;
        height: 80px;
    }
    
    .weather-icon {
        font-size: 2rem;
    }
    
    .weather-stats {
        grid-template-columns: 1fr;
    }
    
    .forecast-container {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
    
    .current-weather, .forecast-section {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .site-title {
        font-size: 1.8rem;
    }
    
    .temp-main {
        font-size: 2.5rem;
    }
    
    .forecast-container {
        grid-template-columns: 1fr;
    }
    
    .current-weather, .forecast-section {
        padding: 1rem;
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    animation: fadeIn 0.5s ease-in-out forwards;
}

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

.slide-up {
    transform: translateY(20px);
    opacity: 0;
    animation: slideUp 0.3s ease-out forwards;
}

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