/* CSS Variables */
:root {
    --glass-bg: rgba(255, 255, 255, 0.15);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-shadow: rgba(0, 0, 0, 0.1);
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --accent-1: #667eea;
    --accent-2: #764ba2;
    --blob-1: rgba(102, 126, 234, 0.6);
    --blob-2: rgba(118, 75, 162, 0.5);
    --blob-3: rgba(236, 72, 153, 0.4);
}

@media (prefers-color-scheme: dark) {
    :root {
        --glass-bg: rgba(255, 255, 255, 0.08);
        --glass-border: rgba(255, 255, 255, 0.15);
        --glass-shadow: rgba(0, 0, 0, 0.3);
        --text-primary: #f0f0f0;
        --text-secondary: #b0b0c0;
        --blob-1: rgba(102, 126, 234, 0.4);
        --blob-2: rgba(118, 75, 162, 0.35);
        --blob-3: rgba(236, 72, 153, 0.3);
    }
}

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

/* Body */
body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    overflow: hidden;
    position: relative;
}

@media (prefers-color-scheme: dark) {
    body {
        background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    }
}

/* Background Blobs */
.bg-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    animation: blobFloat 20s ease-in-out infinite;
}

.blob-1 {
    width: 500px;
    height: 500px;
    background: var(--blob-1);
    top: -150px;
    left: -100px;
    animation-delay: 0s;
}

.blob-2 {
    width: 400px;
    height: 400px;
    background: var(--blob-2);
    bottom: -100px;
    right: -100px;
    animation-delay: -5s;
}

.blob-3 {
    width: 350px;
    height: 350px;
    background: var(--blob-3);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -10s;
    animation-name: blobFloatCenter;
}

@keyframes blobFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(20px, 10px) scale(1.02); }
}

@keyframes blobFloatCenter {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    25% { transform: translate(-45%, -55%) scale(1.05); }
    50% { transform: translate(-55%, -45%) scale(0.95); }
    75% { transform: translate(-48%, -52%) scale(1.02); }
}

/* Glass Card */
.glass-card {
    position: relative;
    z-index: 1;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px var(--glass-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    padding: 3rem 4rem;
    text-align: center;
    animation: cardFadeIn 1s ease-out;
    max-width: 90vw;
}

@keyframes cardFadeIn {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

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

.particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    animation: particleRise 15s linear infinite;
}

@keyframes particleRise {
    0% {
        transform: translateY(100vh) scale(0);
        opacity: 0;
    }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% {
        transform: translateY(-100vh) scale(1);
        opacity: 0;
    }
}

/* Glow Rings */
.glow-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 450px;
    height: 450px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.1);
    animation: ringPulse 4s ease-in-out infinite;
    pointer-events: none;
}

.glow-ring:nth-child(2) {
    width: 550px;
    height: 550px;
    animation-delay: -1s;
}

.glow-ring:nth-child(3) {
    width: 650px;
    height: 650px;
    animation-delay: -2s;
}

@keyframes ringPulse {
    0%, 100% {
        opacity: 0.3;
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        opacity: 0.1;
        transform: translate(-50%, -50%) scale(1.05);
    }
}

/* Gradient Text */
.gradient-text {
    background: linear-gradient(135deg, var(--accent-1) 0%, var(--accent-2) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@media (prefers-color-scheme: dark) {
    .gradient-text {
        background: linear-gradient(135deg, #a5b4fc 0%, #c4b5fd 100%);
        -webkit-background-clip: text;
        background-clip: text;
    }
}

/* Button */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    border: none;
    border-radius: 50px;
    color: white;
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.5);
}

.btn-primary svg {
    width: 18px;
    height: 18px;
}