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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #000000;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(255, 0, 128, 0.4) 0%, transparent 30%),
        radial-gradient(circle at 80% 20%, rgba(0, 191, 255, 0.4) 0%, transparent 35%),
        radial-gradient(circle at 40% 70%, rgba(255, 215, 0, 0.3) 0%, transparent 25%),
        radial-gradient(circle at 90% 80%, rgba(138, 43, 226, 0.3) 0%, transparent 40%),
        radial-gradient(circle at 10% 90%, rgba(50, 205, 50, 0.3) 0%, transparent 35%),
        linear-gradient(45deg, rgba(0, 0, 0, 0.8), rgba(20, 20, 40, 0.9));
    animation: aurora 20s ease-in-out infinite;
    z-index: 0;
}

body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="0.5" fill="white" opacity="0.05"/><circle cx="75" cy="25" r="0.3" fill="white" opacity="0.03"/><circle cx="25" cy="75" r="0.4" fill="white" opacity="0.04"/><circle cx="75" cy="75" r="0.6" fill="white" opacity="0.02"/><circle cx="50" cy="50" r="0.2" fill="white" opacity="0.06"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    pointer-events: none;
    z-index: 0;
}

@keyframes aurora {
    0%, 100% { 
        transform: translate(0, 0) rotate(0deg) scale(1);
        filter: hue-rotate(0deg) brightness(1);
    }
    25% { 
        transform: translate(20px, -30px) rotate(1deg) scale(1.05);
        filter: hue-rotate(90deg) brightness(1.1);
    }
    50% { 
        transform: translate(-15px, 20px) rotate(-1deg) scale(0.95);
        filter: hue-rotate(180deg) brightness(0.9);
    }
    75% { 
        transform: translate(30px, 10px) rotate(0.5deg) scale(1.02);
        filter: hue-rotate(270deg) brightness(1.05);
    }
}

.container {
    text-align: center;
    padding: 3rem;
    background: rgba(20, 20, 20, 0.8);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    max-width: 500px;
    width: 90%;
    animation: slideUp 1s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    z-index: 1;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(60px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.profile-section {
    margin-bottom: 3rem;
}

.profile-avatar {
    position: relative;
    width: 100px;
    height: 100px;
    margin: 0 auto 2rem auto;
}

.avatar-image {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.avatar-image:hover {
    transform: scale(1.02);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.avatar-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: rgba(40, 40, 40, 0.8);
    border: 2px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
}

.name {
    font-size: 2.2rem;
    color: #fff;
    margin-bottom: 0.5rem;
    font-weight: 600;
    letter-spacing: -0.5px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.description {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
    font-weight: 400;
    letter-spacing: 0.5px;
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: 1rem 1.5rem;
    background: rgba(30, 30, 30, 0.6);
    border-radius: 16px;
    text-decoration: none;
    color: #fff;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.social-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.05), transparent);
    transition: left 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.social-link:hover::before {
    left: 100%;
}

.social-link:hover {
    background: rgba(40, 40, 40, 0.8);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.icon-wrapper {
    margin-right: 1rem;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    flex-shrink: 0;
}

.social-link:hover .icon-wrapper {
    background: rgba(255, 255, 255, 0.15);
}

.social-icon {
    width: 20px;
    height: 20px;
    filter: brightness(0) invert(1);
}

.social-link span {
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.3px;
    flex: 1;
    text-align: left;
}

#twitter-link:hover {
    background: linear-gradient(135deg, rgba(29, 161, 242, 0.15), rgba(40, 40, 40, 0.8));
}

#github-link:hover {
    background: linear-gradient(135deg, rgba(138, 43, 226, 0.15), rgba(40, 40, 40, 0.8));
}

#shizuka-link:hover {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.15), rgba(40, 40, 40, 0.8));
}

#zenn-link:hover {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(40, 40, 40, 0.8));
}

@media (max-width: 480px) {
    .container {
        padding: 2rem;
        margin: 1rem;
    }
    
    .name {
        font-size: 1.8rem;
    }
    
    .social-link {
        padding: 0.8rem 1.2rem;
    }
}