@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;700;900&display=swap");

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

body {
    width: 100%;
    height: 100vh;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: "Inter", sans-serif;
    background: radial-gradient(circle at 30% 30%, #222, #000 70%);
    color: white;
}

/* === 動態背景漸層 === */
.bg {
    position: fixed;
    inset: 0;
    background: linear-gradient(120deg, #ff4d4d, #ff66cc, #6699ff, #00ffff);
    background-size: 400% 400%;
    filter: blur(90px) brightness(0.8);
    animation: gradientMove 18s ease infinite;
    z-index: -2;
}

/* === 噪聲覆蓋層 === */
.noise {
    position: fixed;
    inset: 0;
    background-image: url("data:image/png;base64,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");
    opacity: 0.05;
    z-index: -1;
    pointer-events: none;
}

/* === 文字樣式 === */
.center h1 {
    font-size: 72px;
    font-weight: 900;
    letter-spacing: 2px;
    text-align: center;
    background: linear-gradient(90deg, #ffffff, #c0ffff, #80c0ff);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: glowMove 6s ease infinite, fadeIn 2s ease forwards;
    filter: drop-shadow(0 0 25px rgba(255, 255, 255, 0.6));
}

/* === 動畫區 === */
@keyframes gradientMove {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

@keyframes glowMove {

    0%,
    100% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }
}

@keyframes fadeIn {
    0% {
        opacity: 0;
        transform: scale(0.95);
    }

    100% {
        opacity: 1;
        transform: scale(1);
    }
}