:root {
    --bg-color: #0a0e14;
    --text-color: #ffffff;
    --accent-glow: #00f2ff;
    --cyber-font: 'Courier New', Courier, monospace;
}

body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: var(--bg-color);
    font-family: var(--cyber-font);
}

#intro-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-color);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: transform 1.2s cubic-bezier(0.77, 0, 0.175, 1), opacity 0.8s ease-in-out;
}

.intro-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.cyber-text {
    color: var(--text-color);
    margin: 0;
    opacity: 0;
    text-transform: none;
    letter-spacing: 4px;
    text-shadow: 0 0 10px rgba(0, 242, 255, 0.5), 0 0 20px rgba(0, 242, 255, 0.3);
    will-change: transform, opacity;
}

#intro-line1 {
    font-size: 4.5rem;
    font-weight: 700;
}

#intro-line2 {
    font-size: 2.4rem;
    font-weight: 300;
    opacity: 0.8;
}

#intro-line3 {
    font-size: 5.5rem;
    font-weight: 900;
    letter-spacing: 8px;
}

#intro-line4 {
    font-size: 2rem;
    font-weight: 500;
    margin-top: 1rem;
}

@media (max-width: 640px) {
    #intro-line1 {
        font-size: 2.8rem;
    }
    #intro-line2 {
        font-size: 1.6rem;
    }
    #intro-line3 {
        font-size: 3.4rem;
        letter-spacing: 4px;
    }
    #intro-line4 {
        font-size: 1.4rem;
        margin-top: 0.5rem;
    }
}

/* Homepage visibility */
#homepage-placeholder {
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #121820;
    color: #8892b0;
}

.content-box {
    padding: 2rem;
    border: 1px solid #233554;
    border-radius: 8px;
    max-width: 600px;
    text-align: center;
}

/* Exit state */
.intro-hidden {
    transform: translateY(100%);
    opacity: 0;
    pointer-events: none;
}