:root {
    --primary-cyan: #00f0ff;
    --primary-blue: #0050ff;
    --dark-bg: #050a15;
    --glass-bg: rgba(10, 20, 40, 0.4);
    --glass-border: rgba(0, 240, 255, 0.2);
    --text-main: #ffffff;
    --text-muted: #a0aec0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

body {
    background-color: var(--dark-bg);
    color: var(--text-main);
    overflow: hidden;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    background-image: url('assets/bg.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-blend-mode: overlay;
}

body::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at center, transparent 0%, var(--dark-bg) 100%);
    z-index: 1;
}

.background-container {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 2;
    pointer-events: none;
}

.stars {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    /* subtle dot pattern for stars */
    background-image: radial-gradient(rgba(255,255,255,0.3) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: 2;
    opacity: 0.5;
}

.main-content {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 500px;
    padding: 20px;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 30px;
    padding: 50px 30px;
    text-align: center;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5),
                inset 0 0 20px rgba(0, 240, 255, 0.1);
    animation: float 6s ease-in-out infinite;
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, transparent, var(--primary-cyan), transparent, transparent);
    animation: rotate 10s linear infinite;
    opacity: 0.1;
    z-index: -1;
}

@keyframes rotate {
    100% { transform: rotate(360deg); }
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0px); }
}

.title {
    font-size: 3.5rem;
    font-weight: 900;
    letter-spacing: 2px;
    margin-bottom: 10px;
    background: linear-gradient(to right, #ffffff, var(--primary-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 30px rgba(0, 240, 255, 0.3);
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 50px;
    font-weight: 300;
    letter-spacing: 1px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-cyan));
    color: white;
    text-decoration: none;
    padding: 18px 40px;
    border-radius: 50px;
    font-size: 1.4rem;
    font-weight: 700;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    box-shadow: 0 10px 30px rgba(0, 240, 255, 0.4);
    position: relative;
    overflow: hidden;
}

.download-btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.3), transparent);
    transform: skewX(-25deg);
    animation: shine 3s infinite;
}

@keyframes shine {
    0% { left: -100%; }
    20% { left: 200%; }
    100% { left: 200%; }
}

.download-btn:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 15px 40px rgba(0, 240, 255, 0.6);
}

.download-btn:active {
    transform: translateY(2px) scale(0.98);
}

.btn-icon svg {
    width: 24px;
    height: 24px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {transform: translateY(0);}
    40% {transform: translateY(-5px);}
    60% {transform: translateY(-3px);}
}

.version-info {
    margin-top: 30px;
    font-size: 0.9rem;
    color: var(--text-muted);
    opacity: 0.7;
}

@media (max-width: 600px) {
    .title { font-size: 2.5rem; }
    .download-btn { padding: 15px 30px; font-size: 1.2rem; }
    .glass-card { padding: 40px 20px; }
}