.aicedoscroll {
    --aicedoscroll-height: 520vh;
    --aicedoscroll-height-mobile: 450vh;
    --aicedoscroll-min-height: 560px;
    --aicedoscroll-video-width: 94vw;
    --aicedoscroll-video-width-mobile: 165vw;
    --aicedoscroll-video-top-mobile: 43%;
    --aicedoscroll-bg: #c4c4c4;
    --aicedoscroll-text: #17202a;
    --aicedoscroll-accent: #00cccc;
    position: relative;
    z-index: 0;
    height: var(--aicedoscroll-height);
    background: var(--aicedoscroll-bg);
}

.aicedoscroll--fullwidth {
    width: 100vw;
    max-width: none;
    margin-inline: calc(50% - 50vw);
}

.aicedoscroll__stage {
    position: sticky;
    top: 0;
    height: 100vh;
    height: 100svh;
    min-height: var(--aicedoscroll-min-height);
    overflow: hidden;
    display: grid;
    place-items: center;
    isolation: isolate;
    background: var(--aicedoscroll-bg);
}

.aicedoscroll__video {
    position: absolute;
    left: 50%;
    top: 50%;
    width: var(--aicedoscroll-video-width);
    max-width: none;
    height: auto;
    transform: translate(-50%, -50%);
    pointer-events: none;
    user-select: none;
    z-index: 1;
}

.aicedoscroll__panel {
    position: absolute;
    z-index: 2;
    top: 50%;
    width: min(420px, 34vw);
    padding: 24px 26px;
    color: var(--aicedoscroll-text);
    background: rgba(255, 255, 255, 0.74);
    border: 1px solid rgba(255, 255, 255, 0.72);
    border-radius: 2px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(24px);
    pointer-events: none;
}

.aicedoscroll__panel--left { left: clamp(24px, 6vw, 110px); }
.aicedoscroll__panel--right { right: clamp(24px, 6vw, 110px); }
.aicedoscroll__panel--center {
    left: 50%;
    top: auto;
    bottom: clamp(70px, 10vh, 140px);
    transform: translate(-50%, 24px);
    text-align: center;
}

.aicedoscroll__panel h2 {
    margin: 7px 0 10px;
    color: inherit;
    font-size: clamp(1.8rem, 3vw, 3.7rem);
    line-height: 0.98;
    letter-spacing: -0.035em;
}

.aicedoscroll__panel p {
    margin: 0;
    font-size: clamp(1rem, 1.3vw, 1.2rem);
    line-height: 1.45;
}

.aicedoscroll__eyebrow {
    display: block;
    color: var(--aicedoscroll-accent);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.aicedoscroll__hint {
    position: absolute;
    z-index: 3;
    left: 50%;
    bottom: max(24px, env(safe-area-inset-bottom));
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    color: var(--aicedoscroll-text);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    transform: translateX(-50%);
    transition: opacity 150ms linear;
}

.aicedoscroll__hint-arrow {
    color: var(--aicedoscroll-accent);
    font-size: 1.4rem;
    animation: aicedoscroll-hint 1.3s ease-in-out infinite;
}

@keyframes aicedoscroll-hint {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(7px); }
}

@media (max-width: 760px) {
    .aicedoscroll { height: var(--aicedoscroll-height-mobile); }
    .aicedoscroll__stage { min-height: min(var(--aicedoscroll-min-height), 520px); }
    .aicedoscroll__video {
        width: var(--aicedoscroll-video-width-mobile);
        top: var(--aicedoscroll-video-top-mobile);
    }
    .aicedoscroll__panel,
    .aicedoscroll__panel--left,
    .aicedoscroll__panel--right,
    .aicedoscroll__panel--center {
        top: auto;
        right: 18px;
        bottom: max(72px, calc(env(safe-area-inset-bottom) + 56px));
        left: 18px;
        width: auto;
        padding: 18px 20px;
        text-align: left;
        transform: translateY(24px);
    }
    .aicedoscroll__panel h2 { font-size: clamp(1.7rem, 8vw, 2.8rem); }
}

@media (prefers-reduced-motion: reduce) {
    .aicedoscroll { height: auto; }
    .aicedoscroll__stage { position: relative; min-height: 78vh; }
    .aicedoscroll__panel { display: none; }
    .aicedoscroll__panel:first-of-type {
        display: block;
        opacity: 1 !important;
        visibility: visible !important;
        transform: none !important;
    }
    .aicedoscroll__hint { display: none; }
    .aicedoscroll__hint-arrow { animation: none; }
}