:root {
    --bg-color: #87CEEB; /* default clear sky */
    --text-color: #111111;
    --border-color: #111111;
    --accent: #ffc900;
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    overflow: hidden;
    transition: background-color 0.5s ease;
}

#sky-overlay {
    position: absolute;
    top: -50px; left: -50px; right: -50px; bottom: -50px;
    background: #000;
    opacity: 0;
    z-index: 1;
    pointer-events: none;
    transition: opacity 0.5s ease;
}

#rain-container {
    position: absolute;
    top: -50px; left: -50px; right: -50px; bottom: -50px;
    z-index: 2;
    pointer-events: none;
    overflow: hidden;
}

.drop {
    position: absolute;
    background: rgba(255, 255, 255, 0.6);
    width: 2px;
    height: 20px;
    bottom: 100%;
}

#objects-container {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 3;
    pointer-events: none;
    overflow: hidden;
}

.leaf {
    position: absolute;
    width: 20px;
    height: 10px;
    background: #4ade80;
    border-radius: 50% 0 50% 0;
    opacity: 0;
}

.container {
    text-align: center;
    position: relative;
    z-index: 10;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.back-link {
    position: absolute;
    top: 2rem;
    left: 2rem;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 700;
    font-family: 'Space Mono', monospace;
    border: 2px solid var(--border-color);
    padding: 0.5rem 1rem;
    background: #fff;
    box-shadow: 4px 4px 0 var(--border-color);
    transition: transform 0.2s, box-shadow 0.2s;
}

.back-link:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--border-color);
}

.control-panel {
    background: #fff;
    border: 4px solid var(--border-color);
    padding: 3rem;
    box-shadow: 12px 12px 0 var(--border-color);
    width: 90%;
    max-width: 500px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    transition: transform 0.1s ease;
}

.title {
    font-size: clamp(2.5rem, 6vw, 3.5rem);
    font-weight: 900;
    letter-spacing: -2px;
}

.subtitle {
    font-size: 1.2rem;
    font-family: 'Space Mono', monospace;
    background: var(--accent);
    padding: 0.5rem 1rem;
    border: 2px solid var(--border-color);
    transform: rotate(-2deg);
    align-self: center;
}

.sliders {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    text-align: left;
}

.slider-group label {
    font-family: 'Space Mono', monospace;
    font-weight: 700;
    font-size: 1.2rem;
    display: block;
    margin-bottom: 0.5rem;
}

input[type=range] {
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
}
input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 24px;
    width: 24px;
    border-radius: 50%;
    background: var(--border-color);
    cursor: pointer;
    margin-top: -8px;
    border: 3px solid #fff;
    box-shadow: 2px 2px 0 var(--accent);
}
input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 8px;
    cursor: pointer;
    background: #e5e5e5;
    border: 2px solid var(--border-color);
    border-radius: 4px;
}

.main-btn {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 800;
    padding: 1rem 2rem;
    background-color: var(--accent);
    color: var(--text-color);
    border: 4px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 4px 4px 0 var(--border-color);
    cursor: pointer;
    align-self: center;
}

.main-btn:active {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--border-color);
}