* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

:root {
    --bg-color: #0a0a0b;
    --bg-overlay: rgba(0,0,0,0.6);
    --glass-bg: rgba(20, 20, 25, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-primary: #e0e0e0;
    --text-secondary: #888;
    --heading-color: #fff;
    --accent-blue: #4facfe;
    --forecast-bg: rgba(0, 0, 0, 0.8);
    --stat-bg: rgba(255, 255, 255, 0.03);
    --card-bg: rgba(20, 20, 25, 0.7);
    --shadow: none;
}

body.light {
    --bg-color: #f0f4fa;
    --bg-overlay: rgba(255, 255, 255, 0.3);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.1);
    --text-primary: #1e1e2a;
    --text-secondary: #4a4a5a;
    --heading-color: #0b0b14;
    --accent-blue: #0077be;
    --forecast-bg: rgba(240, 244, 250, 0.8);
    --stat-bg: rgba(0, 0, 0, 0.02);
    --card-bg: rgba(255, 255, 255, 0.7);
    --shadow: 0 8px 20px rgba(0,0,0,0.05);
}

body {
    min-height: 100vh;
    background-color: var(--bg-color);
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s, color 0.2s;
    position: relative;
    overflow-x: hidden;
    padding-bottom: env(safe-area-inset-bottom);
}

.animated-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
}

.animated-bg span {
    position: absolute;
    width: 80vmax;
    height: 80vmax;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, rgba(79,172,254,0.2), rgba(0,0,0,0) 70%);
    mix-blend-mode: overlay;
    animation: float 25s infinite ease-in-out;
    opacity: 0.4;
}

body.light .animated-bg span {
    background: radial-gradient(circle at 30% 30%, rgba(0,119,190,0.1), rgba(255,255,255,0) 70%);
    mix-blend-mode: multiply;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(2%, -3%) scale(1.05); }
    66% { transform: translate(-2%, 2%) scale(0.95); }
    100% { transform: translate(0, 0) scale(1); }
}

.top-nav, .main-display, .additional-cards, .forecast-bar, .theme-toggle, .location-btn {
    position: relative;
    z-index: 2;
}

.theme-toggle {
    position: fixed;
    top: 15px;
    right: 15px;
    z-index: 99;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 40px;
    padding: 6px 14px;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: var(--shadow);
    cursor: pointer;
    user-select: none;
    transition: background 0.2s;
    font-size: 0.9rem;
}

.theme-toggle span {
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--text-primary);
}

.theme-toggle .toggle-icon {
    font-size: 1.2rem;
    line-height: 1;
}

.top-nav {
    padding: 1rem 1rem 0.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.search-container {
    width: 100%;
}

.search-container input {
    width: 100%;
    padding: 12px 20px;
    border-radius: 30px;
    border: 1px solid var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    color: var(--text-primary);
    outline: none;
    font-size: 1rem;
    transition: 0.3s;
    -webkit-appearance: none;
}

.location-btn {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
    padding: 12px 20px;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: 0.3s;
    width: 100%;
    -webkit-appearance: none;
}

.location-btn:hover {
    border-color: var(--accent-blue);
    transform: translateY(-2px);
}

.location-btn:active {
    transform: scale(0.98);
}

.main-display {
    padding: 0 1rem;
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin: 10px 0 20px 0;
}

.location-info {
    text-align: center;
}

.location-info h1 {
    font-size: clamp(2rem, 8vw, 3rem);
    font-weight: 600;
    color: var(--heading-color);
    letter-spacing: -0.5px;
    line-height: 1.2;
    margin-bottom: 5px;
}

.current-weather {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    margin-top: 5px;
}

.big-temp {
    font-size: clamp(4rem, 15vw, 6rem);
    font-weight: 300;
    color: var(--accent-blue);
    line-height: 1;
}

.weather-icon {
    width: 70px;
    height: 70px;
    filter: drop-shadow(0 0 10px rgba(79, 172, 254, 0.3));
}

#description {
    font-size: 1.4rem !important;
    margin: 5px 0;
}

.sun-times {
    margin-top: 10px;
    font-size: 0.85rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    color: var(--text-secondary);
}

.stats-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    padding: 1.5rem;
    border-radius: 24px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    border: 1px solid var(--glass-border);
    width: 100%;
    box-shadow: var(--shadow);
}

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

.stat-item span {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.stat-item b {
    font-size: 1.2rem;
    color: var(--heading-color);
    font-weight: 600;
}

.additional-cards {
    padding: 0 1rem;
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 20px;
}

.card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.card h3 {
    margin-bottom: 15px;
    color: var(--heading-color);
    font-weight: 500;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.aqi-display {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    border-radius: 16px;
    margin-bottom: 15px;
}

.aqi-value {
    font-size: 2rem;
    font-weight: 600;
}

.aqi-text {
    font-size: 1.1rem;
    font-weight: 500;
}

.pollutants {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.pollutant {
    background: var(--stat-bg);
    padding: 10px 5px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--glass-border);
}

.pollutant span {
    display: block;
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.pollutant strong {
    font-size: 0.9rem;
    color: var(--heading-color);
}

.uv-display {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin: 12px 0;
    padding: 12px;
    border-radius: 16px;
    background: var(--stat-bg);
}

.uv-value {
    font-size: 2.5rem;
    font-weight: 600;
}

.uv-risk {
    font-size: 1.2rem;
}

.uv-recommendation {
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 10px;
    background: var(--stat-bg);
    border-radius: 12px;
}

.forecast-bar {
    background: var(--forecast-bg);
    backdrop-filter: blur(12px);
    padding: 1rem;
    display: flex;
    gap: 12px;
    overflow-x: auto;
    border-top: 1px solid var(--glass-border);
    transition: background 0.2s;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
}

.forecast-bar::-webkit-scrollbar {
    height: 3px;
}

.forecast-bar::-webkit-scrollbar-track {
    background: var(--glass-border);
    border-radius: 10px;
}

.forecast-bar::-webkit-scrollbar-thumb {
    background: var(--accent-blue);
    border-radius: 10px;
}

.forecast-item {
    min-width: 90px;
    text-align: center;
    padding: 12px 8px;
    background: var(--stat-bg);
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.forecast-item img {
    width: 40px;
    height: 40px;
    margin: 3px 0;
}

.forecast-temp {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent-blue);
}

.forecast-desc {
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-top: 3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.spinner {
    border: 4px solid var(--glass-border);
    border-top: 4px solid var(--accent-blue);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
}

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

.refresh-hint {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 5px;
    opacity: 0.7;
    transition: opacity 0.3s;
}

button, .theme-toggle, .location-btn, .forecast-item {
    min-height: 44px;
}

@supports (padding: max(0px)) {
    body {
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }
    
    .top-nav {
        padding-top: max(1rem, env(safe-area-inset-top));
    }
    
    .forecast-bar {
        padding-bottom: max(1rem, env(safe-area-inset-bottom));
    }
}

@media (orientation: landscape) and (max-height: 600px) {
    .main-display {
        flex-direction: row;
        align-items: flex-start;
    }
    
    .stats-panel {
        max-width: 350px;
    }
    
    .additional-cards {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .card {
        flex: 1 1 calc(50% - 10px);
    }
}

.error-message {
    background: rgba(255, 0, 0, 0.1);
    border: 1px solid rgba(255, 0, 0, 0.3);
    color: #ff6b6b;
    padding: 15px;
    border-radius: 12px;
    text-align: center;
    margin: 10px 1rem;
}