/* CSS Custom Properties */
:root {
    --ice-blue: #00d4ff;
    --hot-pink: #ff3cac;
    --mango: #ff9a3c;
    --grape: #784ba0;
    --cyan: #2b86c5;
    --frost-white: rgba(255, 255, 255, 0.15);
    --text-white: #ffffff;
}

/* Reset */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Base */
html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(
        135deg,
        var(--grape) 0%,
        var(--hot-pink) 25%,
        var(--mango) 50%,
        var(--cyan) 75%,
        var(--ice-blue) 100%
    );
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    color: var(--text-white);
}

/* Animated gradient background */
@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

/* Canvas */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

/* Hero Section */
.hero {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
    text-align: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

/* Logo */
.logo {
    font-size: clamp(3rem, 15vw, 10rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1;
    text-shadow:
        0 0 40px rgba(255, 255, 255, 0.3),
        0 0 80px rgba(255, 255, 255, 0.1);
}

.logo-go {
    opacity: 0.9;
}

.logo-frozen {
    background: linear-gradient(
        90deg,
        var(--ice-blue),
        var(--text-white),
        var(--ice-blue)
    );
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shimmer 3s linear infinite;
}

@keyframes shimmer {
    0% {
        background-position: 0% center;
    }
    100% {
        background-position: 200% center;
    }
}

/* Tagline */
.tagline {
    font-size: clamp(1rem, 3vw, 1.5rem);
    font-weight: 400;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    opacity: 0.9;
}

/* Frosted Glass Card */
.frost-card {
    margin-top: 2rem;
    padding: 1.5rem 3rem;
    background: var(--frost-white);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 1rem;
    box-shadow:
        0 8px 32px rgba(0, 0, 0, 0.1),
        inset 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.coming-soon {
    font-size: clamp(0.875rem, 2vw, 1.125rem);
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

/* Accessibility: Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    body {
        animation: none;
        background-size: 100% 100%;
    }

    .logo-frozen {
        animation: none;
        background-size: 100% auto;
    }

    #particles {
        display: none;
    }
}

/* Responsive */
@media (max-width: 768px) {
    .hero {
        padding: 1.5rem;
    }

    .frost-card {
        padding: 1rem 2rem;
    }
}