.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    background: #000000;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.02) 0%, transparent 50%);
    animation: parallax 20s linear infinite;
    z-index: -3;
}

.hero .nickname {
    font-size: clamp(60px, 12vw, 140px);
    font-weight: 900;
    letter-spacing: 8px;
    margin-bottom: 10px;
    position: relative;
    text-transform: uppercase;
    z-index: 10;
}

.hero .nickname span {
    display: inline-block;
    transition: all 0.3s ease;
    position: relative;
    color: #666666;
}

.hero .nickname span.active {
    color: #ffffff;
    text-shadow: 0 0 30px #ffffff, 0 0 60px #ffffff;
    transform: scale(1.3);
}

.hero .nickname span.inactive {
    color: #666666;
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.1);
}

.hero .subtitle {
    font-size: clamp(18px, 4vw, 24px);
    color: #ffffff;
    margin-bottom: 60px;
    position: relative;
    cursor: default;
    animation: fadeInUp 1s ease-out 0.4s both;
    font-weight: 300;
    letter-spacing: 2px;
    opacity: 0.9;
}

.hero .subtitle::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    width: 0;
    height: 1px;
    background: #ffffff;
    transition: all 0.6s ease;
    transform: translateX(-50%);
}

.hero .subtitle:hover::after {
    width: 100%;
}

.hero .btn {
    animation: fadeInUp 1s ease-out 0.8s both;
    background: transparent;
    color: #ffffff;
    border: 2px solid #ffffff;
    padding: 16px 48px;
    font-size: 18px;
    font-weight: 500;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
    z-index: 2;
}

.hero .btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: #ffffff;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
    z-index: -1;
}

.hero .btn:hover {
    color: #000000;
}

.hero .btn:hover::before {
    width: 300px;
    height: 300px;
}

.particles {
    z-index: -2;
}

@media (max-width: 768px) {
    .hero .nickname {
        letter-spacing: 4px;
        margin-bottom: 20px;
    }
    
    .hero .subtitle {
        margin-bottom: 40px;
        padding: 0 20px;
    }
}

@media (max-width: 480px) {
    .hero .nickname {
        font-size: clamp(40px, 15vw, 80px);
        letter-spacing: 2px;
    }
    
    .hero .subtitle {
        font-size: 16px;
        margin-bottom: 30px;
    }
    
    .hero {
        padding: 0 15px;
    }
}