/* GEGE.OS */

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

body {
    background: radial-gradient(circle at top, #111827, #050608 75%);
    font-family: monospace;
    color: #00ff99;

    display: flex;
    justify-content: center;
    align-items: center;

    min-height: 100vh;
    overflow: hidden;
}

/* Stars */
.stars {
    position: fixed;
    inset: 0;

    background-image:
        radial-gradient(2px 2px at 20% 20%, white, transparent),
        radial-gradient(2px 2px at 80% 15%, #00ff99, transparent),
        radial-gradient(1px 1px at 40% 80%, white, transparent),
        radial-gradient(2px 2px at 70% 60%, white, transparent),
        radial-gradient(2px 2px at 10% 70%, #00ff99, transparent),
        radial-gradient(1px 1px at 90% 90%, white, transparent);

    animation: drift 35s linear infinite;
    opacity: .65;
    z-index: 0;
}

/* Window */
.screen {
    position: relative;
    z-index: 2;

    width: 900px;
    padding: 80px 70px;

    background: rgba(10, 15, 20, .92);
    border: 2px solid #00ff99;

    box-shadow:
        0 0 20px #00ff99,
        0 0 60px rgba(0, 255, 153, .2);
}

/* Title bar */
.titlebar {
    display: flex;
    justify-content: space-between;
    align-items: center;

    padding: 15px 20px;
    border-bottom: 1px solid rgba(0, 255, 153, .35);
}

.dots {
    display: flex;
    gap: 8px;
}

.dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #00ff99;
}

.title {
    color: white;
    letter-spacing: 4px;
    font-size: 14px;
}

/* Content */
.content {
    padding: 60px;
    text-align: center;
}

.start-button {
    display: inline-block;
    color: #00ff99;
    font-size: 58px;
    letter-spacing: 5px;
    font-weight: bold;
    margin-bottom: 25px;
    text-shadow: 0 0 15px #00ff99;
    cursor: pointer;
    transition: 0.3s;
}

.start-button:hover {
    color: white;
    transform: scale(1.05);
    text-shadow:
        0 0 10px white,
        0 0 25px #00ff99,
        0 0 50px #00ff99;
}

.tagline {
    color: #d9fff0;
    letter-spacing: 3px;
    font-size: 25px;
    margin-top: 40px;
}

.cursor {
    animation: blink 1s infinite;
}

.content h2 {
    font-size: 28px;
    letter-spacing: 3px;
    margin-bottom: 20px;
}

.content p {
    font-size: 18px;
    letter-spacing: 2px;
    margin-bottom: 10px;
}

/* Menu */
.menu-title {
    margin-top: 30px;
    margin-bottom: 25px;
    color: #c8ffe8;
}

.menu-button {
    display: block;
    width: 100%;

    background: transparent;
    border: 1px solid #00ff99;
    color: #d9fff0;

    font-family: monospace;
    font-size: 20px;
    letter-spacing: 3px;

    padding: 6px;
    margin-bottom: 6px;

    cursor: pointer;
    text-align: left;

    box-shadow: 0 0 10px rgba(0,255,153,.2);
}

.menu-button:hover {
    color: #00ff99;
    box-shadow: 0 0 20px rgba(0,255,153,.6);
}

/* Animations */
@keyframes drift {
    from {
        transform: translateY(0);
    }

    to {
        transform: translateY(-50px);
    }
}

@keyframes blink {
    0%, 50% {
        opacity: 1;
    }

    51%, 100% {
        opacity: 0;
    }
}