:root {
    --bg-color: #F6FCDF;
    --text-color: #31511E;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    /* Updated Font */
    background-color: var(--bg-color);
    color: var(--text-color);
    height: 100vh;
    overflow: hidden;
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.logo-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.logo-icon {
    width: 200px;
    height: auto;
    margin-bottom: -20px;
    display: block;
    filter: drop-shadow(0 10px 15px rgba(49, 81, 30, 0.3));
}

.logo {
    font-size: 120px;
    font-weight: 600;
    letter-spacing: -4px;
    cursor: pointer;
}

.letter {
    display: inline-block;
    color: var(--text-color);
    margin: 0 2px;
    text-shadow: 0 10px 20px rgba(49, 81, 30, 0.3);
}

/* Physics Elements Class (applied by JS) */
.physics-element {
    position: absolute;
    top: 0;
    left: 0;
    transform-origin: 0 0;
    will-change: transform;
}

.controls-hint {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 14px;
    color: var(--text-color);
    background: rgba(49, 81, 30, 0.1);
    padding: 10px 20px;
    border-radius: 20px;
    backdrop-filter: blur(5px);
    pointer-events: none;
    opacity: 0.7;
    font-family: 'Poppins', sans-serif;
}

/* --- VFX Styles --- */
#vfx-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 5;
}

/* Black Hole */
#black-hole-cursor {
    position: absolute;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.4) 50%, transparent 70%);
    border-radius: 50%;
    transform: translate(-50%, -50%) scale(0);
    opacity: 0;
    transition: opacity 0.2s, transform 0.2s;
    pointer-events: none;
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.5);
}

#black-hole-cursor.active {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

/* Explosion Particles */
.explosion-particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background-color: var(--text-color);
    border-radius: 50%;
    pointer-events: none;
    opacity: 0.8;
    animation: fadeOut 0.8s forwards;
    /* Transformation is handled by JS transition */
}

@keyframes fadeOut {
    to {
        opacity: 0;
    }
}

/* Solar Wind Lines */
.wind-line {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(49, 81, 30, 0.3), transparent);
    width: 100px;
    pointer-events: none;
    opacity: 0;
}

.wind-line.right {
    animation: flyWindRight 1s linear forwards;
}

.wind-line.left {
    animation: flyWindLeft 1s linear forwards;
}

@keyframes flyWindRight {
    0% {
        opacity: 0;
        transform: translateX(0);
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {
        opacity: 0;
        transform: translateX(200px);
    }
}

@keyframes flyWindLeft {
    0% {
        opacity: 0;
        transform: translateX(0);
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {
        opacity: 0;
        transform: translateX(-300px);
    }
}