:root {
    --bg-color: #ECEFF4;
    --card-bg: #FFFFFF;
    --text-color: #2D3748;
    --accent-color: #4C68D7;
    --border-color: #E2E8F0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    --aqi-1: #68D391;
    --aqi-2: #F6E05E;
    --aqi-3: #F6AD55;
    --aqi-4: #FC8181;
    --aqi-5: #B794F4;
}

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

body {
    background: var(--bg-color);
    color: var(--text-color);
    font-family: 'Helvetica Neue', Arial, sans-serif;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 25px;
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin-bottom: 25px;
}

.header h1 {
    font-size: 1.8rem;
    font-weight: 500;
}

.search-bar {
    display: flex;
    align-items: center;
    gap: 10px;
}

#city_input {
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    width: 250px;
    transition: border-color 0.2s ease;
}

#city_input:focus {
    outline: none;
    border-color: var(--accent-color);
}

#searchBtn, #locationBtn {
    padding: 10px;
    border: none;
    border-radius: 8px;
    background: var(--accent-color);
    color: #fff;
    cursor: pointer;
    transition: background 0.2s ease;
}

#searchBtn:hover, #locationBtn:hover {
    background: #3b55b3;
}

.weather-dashboard {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 25px;
}

.card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.current-weather .city-name {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 15px;
}

.weather-main {
    display: flex;
    align-items: center;
    gap: 20px;
}

.weather-icon {
    width: 80px;
}

.temp-info .temp {
    font-size: 2.5rem;
    font-weight: 600;
}

.temp-info .description {
    font-size: 1.1rem;
    color: #718096;
}

.weather-meta {
    margin-top: 15px;
    font-size: 0.9rem;
    color: #718096;
}

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

.forecast-section h3 {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 15px;
}

.forecast-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.forecast-grid div {
    display: flex;
    align-items: center;
    gap: 15px;
}

.forecast-grid img {
    width: 40px;
}

.forecast-grid span {
    font-size: 1rem;
    font-weight: 500;
}

.forecast-grid p {
    font-size: 0.9rem;
    color: #718096;
}

.weather-details h3 {
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 15px;
}

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

.highlight-item {
    text-align: center;
}

.highlight-item i {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-bottom: 5px;
}

.highlight-item p {
    font-size: 0.9rem;
    color: #718096;
}

.highlight-item span {
    font-size: 1rem;
    font-weight: 500;
}

.air-quality .air-index {
    padding: 5px 15px;
    border-radius: 15px;
    font-size: 0.9rem;
    display: inline-block;
    margin: 10px 0;
}

.aqi-1 { background: var(--aqi-1); }
.aqi-2 { background: var(--aqi-2); }
.aqi-3 { background: var(--aqi-3); }
.aqi-4 { background: var(--aqi-4); }
.aqi-5 { background: var(--aqi-5); }

.air-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 15px;
    text-align: center;
}

.air-item p {
    font-size: 0.9rem;
    color: #718096;
}

.air-item span {
    font-size: 1rem;
    font-weight: 500;
}

.hourly-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 15px;
    text-align: center;
}

.hourly-grid div {
    padding: 10px;
}

.hourly-grid img {
    width: 40px;
}

.hourly-grid span {
    font-size: 1rem;
    font-weight: 500;
}

.hourly-grid p {
    font-size: 0.9rem;
    color: #718096;
}

/* Responsive */
@media (max-width: 900px) {
    .weather-dashboard {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .header {
        flex-direction: column;
        gap: 15px;
        padding: 15px;
    }
    .search-bar {
        flex-direction: column;
        width: 100%;
    }
    #city_input, #searchBtn, #locationBtn {
        width: 100%;
    }
    .weather-main {
        flex-direction: column;
        text-align: center;
    }
}