:root {
    --text-color: #FFFFFF;
    --background-gradient: linear-gradient(135deg, #4A90E2, #87CEEB);
    --glass-background: rgba(255, 255, 255, 0.15);
}

::-webkit-scrollbar {
    display: none;
}

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

html {
    scroll-behavior: smooth;
    scrollbar-width: none;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    -ms-overflow-style: none;
    color: var(--text-color);
    background: var(--background-gradient);
    font-family: 'Poppins', sans-serif;
}

.weather-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: minmax(150px, auto);
    gap: 1rem;
}

.weather-card {
    padding: 1.2rem;
    border-radius: 18px;
    text-align: center;
    transition: transform 0.25s ease;
    backdrop-filter: blur(8px);
    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0 6px 15px rgba(0,0,0,0.15);
}

.weather-card:hover {
    transform: translateY(-4px);
}

.weather-card.main {
    grid-row: span 2;
}

.weather-card h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 0.4rem;
}

.weather-card p {
    font-size: 1.8rem;
    font-weight: 600;
}

.weather-card span {
    font-size: 0.85rem;
    opacity: 0.8;
}

.weather-icon {
    width: 80px;
    height: 80px;
}

.forecast-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 1.5rem;
    gap: 1rem;
}

.forecast-card {
    max-width: 180px;
    padding: 1rem;
    flex: 1 1 140px;
    border-radius: 18px;
    text-align: center;
    backdrop-filter: blur(8px);
    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0 6px 15px rgba(0,0,0,0.15);
}

.forecast-card h3 {
    margin-bottom: 0.3rem;
    font-size: 0.9rem;
    font-weight: 500;
}

.forecast-card p {
    font-size: 1.5rem;
    font-weight: 600;
}

.forecast-card span {
    font-size: 0.75rem;
    opacity: 0.8;
}

#bg-video {
    height: 100%;
    width: 100%;
    position: fixed;
    object-fit: cover;
    inset: 0;
    opacity: 0;
    z-index: -2;
    pointer-events: none;
    transition: opacity 0.8s ease;
}

body.video-active::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background: rgba(0, 0, 0, 0.35);
}

#header,
#footer {
    height: 10vh;
    flex-shrink: 0;
}

#main {
    width: 100%;
    display: flex;
    flex: 1;
    justify-content: center;
    align-items: center;
}

#title-container h1 {
    margin-bottom: 1.5rem;
    font-size: 2rem;
}

#app-container {
    width: clamp(70%, 60vw, 900px);
    max-width: 900px;
    padding: 2rem;
    border-radius: 20px;
    text-align: center;
    will-change: height;
    overflow: hidden;
    backdrop-filter: blur(12px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    background: var(--glass-background);
}

#search-container {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

#search-container input {
    flex: 1;
    padding: 0.7rem;
    border: none;
    border-radius: 15px;
    font-size: 1rem;
    outline: none;
}

#search-container button {
    padding: 0.7rem 1rem;
    border: none;
    border-radius: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s;
    color: #333333;
    background: #FFFFFF;
}

#search-container button:hover {
    background: #f1f1f1;
}

#result-container {
    margin-top: 1.5rem;
}

@media (max-width: 900px) {
    .weather-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .forecast-container {
        flex: 1 1 160px;
    }
}

@media (max-width: 600px) {
    .weather-grid {
        grid-template-columns: 1fr;
    }

    .weather-card.main {
        grid-row: span 1;
    }

    .forecast-container {
        flex: 1 1 140px;
    }

    #app-container {
        width: 90%;
        padding: 1.5rem;
        border-radius: 16px;
    }

    #title-container h1 {
        font-size: 1.5rem;
    }

    #search-container {
        flex-direction: column;
    }

    #search-container input,
    #search-container button {
        width: 100%;
    }
}