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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: black;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Header */
header {
    position: relative;
    z-index: 100;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
}

.logo svg {
    margin-right: 0.5rem;
}

.sign-btn {
    background: transparent;
    border: 2px solid white;
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.sign-btn:hover {
    background: white;
    color: #1a237e;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(255,255,255,0.2);
}

/* Main content */
main {
    position: relative;
    z-index: 50;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 80px);
    text-align: center;
    padding: 2rem;
}

.hero-text {
    max-width: 800px;
    margin-bottom: 3rem;
}

.hero-text h1 {
    font-size: 48px;
    font-weight: 700;
    color: white;
    line-height: 1.1;
    margin-bottom: 1rem;
    text-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    color: white;
    font-size: 1.5rem;
    animation: bounce 2s infinite;
    cursor: pointer;
    transition: all 0.3s ease;
}

.scroll-indicator:hover {
    color: #64b5f6;
    transform: translateX(-50%) scale(1.1);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* Footer */
footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(20px);
    padding: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    transform: translateY(100%);
    transition: transform 0.5s ease;
    z-index: 200;
}

footer.show {
    transform: translateY(0);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
}

.footer-links {
    display: flex;
    list-style: none;
    gap: 3rem;
}

.footer-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 1rem;
    border-radius: 8px;
}

.footer-links a:hover {
    color: #64b5f6;
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* Close button */
.close-footer {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.close-footer:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: rotate(90deg);
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .footer-links {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .footer-links a {
        padding: 1rem;
    }
}