/* --- CSS Variables --- */
:root {
    --bg-color: #0f172a; /* bg-slate-900 */
    --spotlight-color: rgba(56, 189, 248, 0.15);
    --particle-color: #64748b; /* slate-500 */
}

/* --- Base Body Styles --- */
body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: #e2e8f0; /* slate-200 */
}

/* --- Background and Layout --- */
#constellation-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0; /* Keep canvas in the background */
}

.content-wrapper {
    position: relative;
    z-index: 10; /* Ensure content is on top of the canvas */
}

/* --- Effects and Animations --- */
.spotlight {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 999;
    background: radial-gradient(circle at var(--x, 50%) var(--y, 50%), var(--spotlight-color) 0%, transparent 25%);
    transition: background 0.1s ease-out;
}

.hero-glow {
    background-image: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(56, 189, 248, 0.1), rgba(255, 255, 255, 0));
}

.text-shimmer {
    background: linear-gradient(90deg, #93c5fd, #ffffff, #93c5fd);
    background-size: 200% auto;
    color: #fff;
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shimmer 5s linear infinite;
}

/* --- Keyframe Animations --- */
@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
    100% { transform: translateY(0px); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes shimmer {
    to { background-position: -200% center; }
}


/* --- Animation Utility Classes --- */
.animate-fade-in {
    animation: fadeIn 1s ease-in-out;
}
.animate-fade-in-up {
    animation: fadeInUp 0.8s ease-out forwards;
    opacity: 0;
}
.hero-image-float {
    animation: float 4s ease-in-out infinite;
}

/* --- Custom Component Styles --- */
/* These styles add effects that are not covered by the standard Tailwind classes in the HTML */
.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: #38bdf8; /* sky-400 */
    transition: all 0.3s ease-in-out;
    transform: translateX(-50%);
}
.nav-link:hover::before {
    width: 80%;
}