/* static/style.css */

:root {
    --planet-color: #EDE8D4; /* Light cream/gold for line art style */
    --orbit-color: rgba(255, 255, 255, 0.2);
    --star-color: rgba(255, 255, 255, 0.8);
    --sun-color: #FDB813; /* A warm yellow for the sun */
    --info-text-color: #EDE8D4;
    --background-dark: #000;
}

body {
    margin: 0;
    height: 100vh;
    background-color: var(--background-dark);
    overflow: hidden; /* Prevent scrollbars from particles */
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Space Mono', monospace; /* A cosmic-feeling font, or sans-serif */
    color: var(--info-text-color);
    position: relative;
    perspective: 1000px; /* For subtle 3D effects */
}

/* Main container for the solar system */
#solar-system-container {
    position: relative;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    /* Optional: subtle background movement for overall dynamic feel */
    animation: backgroundPan 120s linear infinite alternate;
}

@keyframes backgroundPan {
    0% { transform: translateY(0px) rotateX(0deg); }
    100% { transform: translateY(-50px) rotateX(2deg); }
}


/* --- Stars Twinkling Effect --- */
#stars-container {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none; /* Allows interaction with elements beneath */
    z-index: 0; /* Keep stars in the background */
}

.star {
    position: absolute;
    background-color: var(--star-color);
    border-radius: 50%;
    /* Custom properties set by JS for unique animation per star */
    animation: twinkle var(--duration) ease-in-out infinite alternate var(--delay);
    opacity: 0; /* Stars start invisible, twinkle in */
    box-shadow: 0 0 5px rgba(255, 255, 255, 0.5); /* Subtle glow */
}

@keyframes twinkle {
    0% { opacity: 0; transform: scale(0.8); }
    50% { opacity: 1; transform: scale(1.2); }
    100% { opacity: 0.5; transform: scale(0.9); }
}

/* --- SVG Planet Scene --- */
#planet-scene {
    width: 90vmin; /* Responsive size relative to viewport */
    height: 90vmin;
    max-width: 900px; /* Maximum size */
    max-height: 900px;
    position: relative;
    z-index: 10; /* Above stars */
    transform-origin: center center; /* For overall scene rotation if desired */
    /* Optional: subtle rotation for the entire scene */
    animation: sceneRotate 120s linear infinite;
}

@keyframes sceneRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Sun and its flares */
.sun {
    fill: var(--sun-color);
    stroke: var(--sun-color);
    stroke-width: 2px;
    filter: blur(2px) drop-shadow(0 0 10px var(--sun-color)); /* Glow effect */
}

.sun-flare-group {
    transform-origin: 500px 500px; /* Center of SVG */
    animation: sunFlareRotate 60s linear infinite;
}

.sun-flare {
    stroke: var(--sun-color);
    stroke-width: 1px;
    opacity: 0.8;
    animation: flarePulse 2s ease-in-out infinite alternate;
}

@keyframes sunFlareRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes flarePulse {
    0% { opacity: 0.8; stroke-width: 1px; }
    50% { opacity: 1; stroke-width: 2px; }
    100% { opacity: 0.8; stroke-width: 1px; }
}

/* Orbits */
.orbit {
    fill: none;
    stroke: var(--orbit-color);
    stroke-width: 1px;
    stroke-dasharray: 2 5; /* Dashed line for a cosmic feel */
    animation: orbitDash 30s linear infinite; /* Subtle dash animation */
}

@keyframes orbitDash {
    from { stroke-dashoffset: 0; }
    to { stroke-dashoffset: 70; }
}

/* Planets */
.planet {
    fill: var(--planet-color);
    stroke: var(--planet-color);
    stroke-width: 1px;
    box-shadow: 0 0 5px rgba(255, 255, 255, 0.3); /* Subtle glow */
}

.moon {
    fill: rgba(255, 255, 255, 0.5);
    stroke: none;
    animation: moonRotate 10s linear infinite; /* Make moon rotate around its planet */
    transform-origin: center center; /* Placeholder, will be adjusted by JS/CSS within group */
}

@keyframes moonRotate {
    from { transform: rotate(0deg) translateX(15px); }
    to { transform: rotate(360deg) translateX(15px); }
}


/* Orbital animation for planet groups */
.planet-group {
    transform-origin: 500px 500px; /* Center of the SVG, i.e., around the sun */
    animation: orbit var(--orbit-speed) linear infinite;
}

/* Define the orbital path animation */
@keyframes orbit {
    from { transform: rotate(var(--initial-angle)); }
    to { transform: rotate(calc(360deg + var(--initial-angle))); }
}

/* Saturn-like planet ring effect */
.planet-ring {
    fill: none;
    stroke: var(--planet-color);
    stroke-width: 2px;
    /* The ring should rotate around its own planet, not the sun */
    transform-origin: center center; /* Needs to be relative to the planet's position */
    animation: ring-rotate 8s linear infinite, ring-perspective 4s ease-in-out infinite alternate;
}

@keyframes ring-rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes ring-perspective {
    0% { transform: scaleY(1) rotateX(0deg); opacity: 0.8;}
    50% { transform: scaleY(0.8) rotateX(10deg); opacity: 1;} /* Slight tilt/wobble */
    100% { transform: scaleY(1) rotateX(0deg); opacity: 0.8;}
}

/* Small debris/asteroids */
.debris {
    fill: var(--planet-color);
    opacity: 0.6;
    animation: debrisOrbit var(--debris-speed) linear infinite var(--debris-delay);
    transform-origin: 500px 500px; /* Orbit around the sun */
    filter: blur(0.5px);
}

@keyframes debrisOrbit {
    from { transform: rotate(0deg) translateX(var(--debris-radius)); }
    to { transform: rotate(360deg) translateX(var(--debris-radius)); }
}

/* --- Info Box UI --- */
#info-box {
    position: absolute;
    top: 50%;
    left: 10%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.5);
    padding: 20px 30px;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
    z-index: 20;
    max-width: 300px;
    text-align: center;
    border: 1px solid var(--orbit-color);
    animation: fadeInSlide 2s ease-out forwards;
}

#info-box h1 {
    color: var(--sun-color);
    text-shadow: 0 0 5px var(--sun-color);
    margin-top: 0;
    font-size: 2.2em;
}

#info-box p {
    font-size: 0.9em;
    line-height: 1.5;
    margin-bottom: 5px;
}

@keyframes fadeInSlide {
    0% { opacity: 0; transform: translateY(-70%) translateX(-20px); }
    100% { opacity: 1; transform: translateY(-50%) translateX(0px); }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    #info-box {
        left: 50%;
        top: 80%;
        transform: translate(-50%, -50%);
        padding: 15px 20px;
        max-width: 80%;
    }
    #info-box h1 {
        font-size: 1.8em;
    }
    #info-box p {
        font-size: 0.8em;
    }
    #planet-scene {
        width: 100vmin;
        height: 100vmin;
    }
}