html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        linear-gradient(180deg, #ffffff 0%, #f7f9ff 100%);
    color: #000000;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 50px;
    background: #000000;
    z-index: 30;
}

footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    box-sizing: border-box;
    padding: 8px 14px;
    background: rgba(0, 0, 0, 1);
    color: #ffffff;
    font-size: 14px;
    font-weight: 700;
    z-index: 30;
}

footer p {
    margin: 0;
}

.footer-link {
    color: #ffffff;
    text-decoration: none;
}

.footer-link:hover {
    color: rgb(74, 118, 206);
}

.hero {
    position: fixed;
    inset: 0;
    z-index: 20;
    width: 100%;
    text-align: center;
    pointer-events: none;
    isolation: isolate;
}

.hero::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 53%;
    width: min(78vw, 960px);
    height: min(34vw, 320px);
    transform: translate(-50%, -50%);
    background:
        radial-gradient(circle at 50% 44%, rgba(246, 250, 255, 0.99), rgba(246, 250, 255, 0.38) 30%, rgba(255, 255, 255, 0) 72%),
        radial-gradient(circle at 48% 58%, rgba(38, 108, 214, 0.22), rgba(38, 108, 214, 0.07) 34%, rgba(38, 108, 214, 0) 72%),
        radial-gradient(circle at 59% 41%, rgba(106, 124, 164, 0.18), rgba(106, 124, 164, 0.05) 24%, rgba(106, 124, 164, 0) 68%),
        repeating-linear-gradient(112deg, rgba(14, 24, 68, 0.035) 0 2px, rgba(255, 255, 255, 0) 2px 18px);
    filter: blur(16px);
    opacity: 0.96;
    animation: tech-halo 19.2s ease-in-out infinite;
}

.hero::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 60%;
    width: min(72vw, 880px);
    height: min(26vw, 220px);
    transform: translate(-50%, -50%);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0), rgba(54, 118, 214, 0.08) 40%, rgba(106, 124, 164, 0.09) 60%, rgba(14, 34, 92, 0.16)),
        repeating-linear-gradient(180deg, rgba(0, 170, 196, 0.08) 0 2px, rgba(255, 255, 255, 0) 2px 14px),
        repeating-linear-gradient(90deg, rgba(16, 22, 47, 0.05) 0 1px, rgba(255, 255, 255, 0) 1px 24px);
    filter: blur(18px);
    opacity: 0.76;
    animation: signal-wash 28.8s ease-in-out infinite;
}

h1 {
    margin: 0;
    position: absolute;
    top: 50%;
    left: 50%;
    width: min(calc(100% - 48px), 1400px);
    font-family: "Cambria", serif;
    font-size: clamp(3.9rem, 10.4vw, 10rem);
    font-weight: 700;
    line-height: 0.95;
    letter-spacing: 0.045em;
    text-transform: uppercase;
    color: #10162f;
    text-shadow:
        0 18px 34px rgba(255, 255, 255, 0.72),
        -3px 0 0 rgba(0, 168, 214, 0.24),
        3px 0 0 rgba(106, 124, 164, 0.18),
        0 0 22px rgba(54, 118, 214, 0.22),
        0 0 48px rgba(0, 168, 214, 0.12),
        6px 6px 8px rgba(18, 28, 68, 0.14);
    transform: translate(-50%, -50%);
    isolation: isolate;
    mix-blend-mode: multiply;
    animation: title-core 15.2s ease-in-out infinite;
}

h1::before,
h1::after {
    content: attr(data-text);
    position: absolute;
    inset: 0;
    pointer-events: none;
}

h1::before {
    color: transparent;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 1.0) 0%, rgba(190, 228, 255, 0.99) 16%, rgba(68, 148, 230, 0.97) 44%, rgba(30, 64, 148, 0.94) 72%, rgba(8, 14, 44, 1.0) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    filter: blur(0.4px);
    opacity: 1;
    transform-origin: 50% 72%;
    mix-blend-mode: multiply;
    animation: title-charge 11.2s ease-in-out infinite;
}

h1::after {
    color: rgba(20, 52, 128, 0.52);
    filter: blur(6px);
    transform: translate(2px, 10px) scaleY(0.9);
    opacity: 0.88;
    mix-blend-mode: multiply;
    -webkit-mask-image:
        repeating-linear-gradient(180deg, rgba(0, 0, 0, 0) 0 3px, rgba(0, 0, 0, 0.82) 3px 8px, rgba(0, 0, 0, 0) 8px 15px),
        linear-gradient(90deg, transparent 0%, black 18%, black 82%, transparent 100%);
    mask-image:
        repeating-linear-gradient(180deg, rgba(0, 0, 0, 0) 0 3px, rgba(0, 0, 0, 0.82) 3px 8px, rgba(0, 0, 0, 0) 8px 15px),
        linear-gradient(90deg, transparent 0%, black 18%, black 82%, transparent 100%);
    animation: title-ghost 17.6s ease-in-out infinite;
}

.play-button {
    position: absolute;
    top: 71%;
    left: 50%;
    min-width: 216px;
    padding: 18px 54px;
    border: 1px solid rgba(48, 78, 134, 0.34);
    border-radius: 999px;
    background:
        linear-gradient(180deg, rgba(252, 253, 255, 0.96), rgba(232, 240, 250, 0.92)),
        repeating-linear-gradient(180deg, rgba(16, 22, 47, 0.045) 0 1px, rgba(255, 255, 255, 0) 1px 9px),
        linear-gradient(90deg, rgba(0, 168, 214, 0.08), rgba(255, 255, 255, 0) 36%, rgba(106, 124, 164, 0.12));
    color: #10162f;
    font-family: "Cambria", serif;
    font-size: 30px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    cursor: pointer;
    box-shadow:
        0 14px 28px rgba(16, 22, 47, 0.1),
        inset 0 0 0 1px rgba(255, 255, 255, 0.7),
        inset 0 0 24px rgba(0, 168, 214, 0.05);
    text-shadow:
        -1px 0 0 rgba(0, 168, 214, 0.16),
        1px 0 0 rgba(106, 124, 164, 0.2),
        0 0 14px rgba(54, 118, 214, 0.08);
    opacity: 1;
    transition: background-color 0.62s ease, color 0.1s ease, transform 0.42s ease, box-shadow 0.28s ease, border-color 0.28s ease, opacity 0.72s ease, filter 0.72s ease;
    transform: translate(-50%, -50%);
    pointer-events: auto;
}

.play-button:hover {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(236, 244, 252, 0.96)),
        repeating-linear-gradient(180deg, rgba(16, 22, 47, 0.04) 0 1px, rgba(255, 255, 255, 0) 1px 9px),
        linear-gradient(90deg, rgba(0, 168, 214, 0.12), rgba(255, 255, 255, 0) 36%, rgba(106, 124, 164, 0.16));
    border-color: rgba(38, 108, 214, 0.52);
    color: #16204c;
    box-shadow:
        0 18px 34px rgba(16, 22, 47, 0.12),
        0 0 0 1px rgba(106, 124, 164, 0.16),
        inset 0 0 42px rgba(0, 168, 214, 0.08);
}

body[data-audio-playback="playing"] .play-button,
body[data-audio-playback="playing"] .play-button:hover,
body[data-audio-playback="playing"] .play-button:focus-visible {
    opacity: 0.08;
    filter: blur(0.4px);
    transform: translate(-50%, -50%) translateY(8px) scale(0.985);
}

#container {
    position: fixed;
    inset: 0;
    z-index: 10;
    touch-action: none;
    pointer-events: none;
}

#container canvas {
    display: block;
    width: 100%;
    height: 100%;
}

@keyframes tech-halo {
    0%,
    100% {
        opacity: 0.9;
        transform: translate(-50%, -50%) scale(0.98) skewX(-1.5deg);
    }

    50% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1.03) skewX(1.5deg);
    }
}

@keyframes signal-wash {
    0%,
    100% {
        opacity: 0.58;
        transform: translate(-50%, -50%) translateY(6px) scale(0.99) skewX(-2deg);
    }

    50% {
        opacity: 0.78;
        transform: translate(-50%, -50%) translateY(-8px) scale(1.015) skewX(2deg);
    }
}

@keyframes title-core {
    0%,
    100% {
        transform: translate(-50%, -50%) translateY(0) scale(0.985);
    }

    50% {
        transform: translate(-50%, -50%) translateY(-9px) scale(1.03);
    }
}

@keyframes title-charge {
    0%,
    100% {
        opacity: 0.72;
        filter: blur(2px);
        transform: translateY(0) scale(0.99);
    }

    50% {
        opacity: 1;
        filter: blur(0px);
        transform: translateY(-5px) scale(1.02);
    }
}

@keyframes title-ghost {
    0%,
    100% {
        opacity: 0.62;
        filter: blur(5px);
        transform: translate(5px, 13px) scaleY(0.88) skewX(-3deg);
    }

    50% {
        opacity: 1;
        filter: blur(10px);
        transform: translate(-5px, 1px) scaleY(1.05) skewX(3deg);
    }
}

@media (max-width: 900px) {
    .play-button {
        top: 68%;
        min-width: 160px;
        padding: 16px 42px;
        font-size: 28px;
    }
}

@media (max-width: 640px) {
    footer {
        padding: 10px 12px;
        font-size: 12px;
    }

    h1 {
        width: min(calc(100% - 24px), 1400px);
        letter-spacing: 0.025em;
    }

    .play-button {
        top: 66%;
        width: min(240px, 100%);
        font-size: 26px;
    }
}