/* Base styles */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --primary-color: #2B6CB0;
    --background-color: #F7FAFC;
    --error-color: #E53E3E;
    --success-color: #48BB78;
    --warning-color: #ECC94B;
    --text-color: #2D3748;
    --gray-color: #718096;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    min-height: 100vh;
    padding: 2rem;
}

.container {
    max-width: 480px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
.app-title {
    font-size: 2rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 2rem;
    text-align: center;
}

/* Search Form */
.search-form {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.search-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 2px solid #E2E8F0;
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(43, 108, 176, 0.1);
}

.search-button {
    padding: 0.75rem 1.5rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.search-button:hover {
    background-color: #2457A0;
    transform: translateY(-1px);
}

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

/* Loading Spinner */
.loading {
    width: 30px;
    height: 30px;
    border: 3px solid #E2E8F0;
    border-radius: 50%;
    border-top-color: var(--primary-color);
    margin: 1rem auto;
    animation: spin 1s linear infinite;
    display: none;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Error Banner */
.error-banner {
    background-color: var(--error-color);
    color: white;
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    display: none;
}

/* Weather Card */
.weather-card {
    background: white;
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    display: none;
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.weather-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.location-name {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-color);
}

.unit-toggle {
    padding: 0.5rem 1rem;
    background: none;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.unit-toggle:hover {
    background-color: var(--primary-color);
    color: white;
}

.weather-main {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding: 1rem;
    background-color: var(--background-color);
    border-radius: 0.75rem;
}

.weather-icon {
    width: 64px;
    height: 64px;
    object-fit: contain;
}

.temperature {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-color);
}

.condition {
    color: var(--gray-color);
    font-size: 1.1rem;
}

.weather-details {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background-color: var(--background-color);
    border-radius: 0.75rem;
}

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

.detail-label {
    color: var(--gray-color);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.detail-value {
    font-weight: 600;
    color: var(--text-color);
}

.air-quality-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background-color: var(--background-color);
    border-radius: 0.75rem;
}

.air-quality-label {
    font-size: 0.875rem;
    color: var(--gray-color);
}

.air-quality-badge {
    padding: 0.5rem 1rem;
    border-radius: 1rem;
    font-weight: 500;
    font-size: 0.875rem;
}

.air-quality-good {
    background-color: var(--success-color);
    color: white;
}

.air-quality-moderate {
    background-color: var(--warning-color);
    color: var(--text-color);
}

.air-quality-unhealthy {
    background-color: var(--error-color);
    color: white;
}