:root {
    --rossoblu-stripes: linear-gradient(to right,
            #7A1118 0%, #7A1118 10%,
            #0E2E57 10%, #0E2E57 20%,
            #7A1118 20%, #7A1118 30%,
            #0E2E57 30%, #0E2E57 40%,
            #7A1118 40%, #7A1118 50%,
            #0E2E57 50%, #0E2E57 60%,
            #7A1118 60%, #7A1118 70%,
            #0E2E57 70%, #0E2E57 80%,
            #7A1118 80%, #7A1118 90%,
            #0E2E57 90%, #0E2E57 100%);
}

@font-face {
    font-family: 'JustBreathe';
    font-weight: 400;
    font-style: normal;
    font-display: swap;
    src: url('fonts/JustBreathe.eot');
    src: url('fonts/JustBreathe.eot?#iefix') format('embedded-opentype'),
        url('fonts/JustBreathe.woff2') format('woff2'),
        url('fonts/JustBreathe.woff') format('woff');
}

@font-face {
    font-family: 'JustBreatheBd';
    font-weight: 700;
    font-style: normal;
    font-display: swap;
    src: url('fonts/JustBreatheBd.eot');
    src: url('fonts/JustBreatheBd.eot?#iefix') format('embedded-opentype'),
        url('fonts/JustBreatheBd.woff2') format('woff2'),
        url('fonts/JustBreatheBd.woff') format('woff');
}

* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
    overscroll-behavior-y: none;
}

body {
    margin: 0;
    overflow-x: hidden;
    font-family: 'JustBreatheBd';
    background: var(--rossoblu-stripes);
    background-attachment: fixed;
    background-size: 100% 100%;
}

.intro {
    height: 300vh;
}

.intro-frame {
    position: sticky;
    top: 0;
    width: 100vw;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: transparent;
    margin: 0 auto;
}

.frame-overlay {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
    top: 0.44%;
    object-fit: contain;
    z-index: 15;
    pointer-events: none;
    transform-origin: center center;
    transform: scale(0.974);
}

.intro-stage {
    position: relative;
    width: min(95vw, 95vh * 16 / 9);
    height: auto;
    aspect-ratio: 16 / 9;
    margin: auto;
    overflow: hidden;
    background: #000;
    border-radius: 4px;
}

.sequence-frame {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.scroll-hint {
    position: absolute;
    left: 50%;
    bottom: 3%;
    transform: translate(-50%, 0);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: #000;
    font-size: clamp(0.95rem, 1vw + 0.6rem, 1.5rem);
    letter-spacing: 0.04em;
    z-index: 1000;
    pointer-events: none;
    user-select: none;
}

.scroll-arrow {
    width: clamp(18px, 1.6vw + 12px, 42px);
    height: auto;
    rotate: 87deg;
    display: block;
    object-fit: contain;
}

.info-btn {
    position: absolute;
    left: 1%;
    bottom: 6%;
    width: clamp(44px, 6vw, 64px);
    height: auto;
    cursor: pointer;
    z-index: 30;
    transform: translateY(25px) scale(1);
    transition: transform 0.2s ease, filter 0.2s ease;
}

.info-btn-wrapper {
    background: transparent;
    border: 0;
    padding: 0;
    margin: 0;
    appearance: none;
    -webkit-appearance: none;
}

.info-box {
    position: relative;
    width: 100%;
    height: auto;
    object-fit: contain;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.info-box.visible {
    opacity: 1;
    pointer-events: auto;
}

.info-text {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    transform-origin: center;
    width: 90%;
    max-width: 1000px;
    z-index: 1101;
    color: #000;
    text-align: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.info-text.visible {
    opacity: 1;
}

.info-text h2 {
    margin: 0 0 0.6rem;
    font-size: 23px;
    letter-spacing: 0.08em;
}

.info-text p {
    margin: 0 0 0.5rem;
    font-size: 17.5px;
    line-height: 1.3;
}

.info-close {
    position: absolute;
    top: 8%;
    right: 7%;
    width: clamp(18px, 2vw, 30px);
    height: auto;
    z-index: 1102;
    cursor: pointer;
    background: transparent;
    border: 0;
    padding: 0;
    margin: 0;
    appearance: none;
    -webkit-appearance: none;
    opacity: 0;
    pointer-events: none;
}

.info-close img {
    width: 100%;
    height: auto;
    display: block;
}

.info-close.visible {
    opacity: 1;
    pointer-events: auto;
}

.info-overlay {
    position: absolute;
    left: 50%;
    top: 50%;
    width: clamp(520px, 70vw, 980px);
    transform: translate(-50%, -50%) scale(0.90);
    transform-origin: center;
    z-index: 1100;
    opacity: 0;
    pointer-events: none;
}

.info-overlay:has(.info-box.visible) {
    opacity: 1;
    pointer-events: auto;
}

.orientation-warning {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    background: var(--rossoblu-stripes);
    background-attachment: fixed;
    background-size: 100% 100%;
    color: #fff;
    text-align: center;
    padding: 2rem;
    z-index: 60;
}

body.show-orientation-warning .orientation-warning::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: -1;
}

body.show-orientation-warning .orientation-warning {
    display: flex;
}

body.show-orientation-warning {
    overflow: hidden !important;
    height: 100vh;
}

body.show-orientation-warning .intro-frame {
    visibility: hidden;
}

body.show-orientation-warning .loader-overlay {
    display: none !important;
}

.loader-overlay {
    position: fixed;
    inset: 0;
    background: var(--rossoblu-stripes);
    background-attachment: fixed;
    background-size: 100% 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 80;
    opacity: 1;
    transition: opacity 0.4s ease;
}

.loader-overlay::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.35);
}

.loader-overlay.hide {
    opacity: 0;
    pointer-events: none;
}

.loader-box {
    position: relative;
    width: min(60vw, 420px);
    padding: 1.5rem 1.8rem;
    border-radius: 10px;
    text-align: center;
    color: #fff;
    font-family: 'JustBreatheBd', system-ui, -apple-system, sans-serif;
}

.loader-text {
    margin: 0 0 1rem;
    font-size: clamp(0.95rem, 1vw + 0.6rem, 1.5rem);
    letter-spacing: 0.08em;
}

.sound-btn-wrapper {
    position: absolute;
    right: 2%;
    bottom: 3%;
    width: clamp(32px, 4vw, 50px);
    height: clamp(36px, 4.5vw, 55px);
    z-index: 30;
    cursor: pointer;
    padding: 0;
    border: none;
    background: transparent;
}

.sound-btn {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    transition: transform 0.2s ease, filter 0.2s ease;
}

.sound-btn-wrapper:hover .sound-btn {
    filter: brightness(1.1);
}

.loader-bar-clip {
    position: absolute;
    inset: 0;
    border-radius: inherit;
    overflow: hidden;
    z-index: 2;
}

.loader-bar {
    position: relative;
    width: 100%;
    height: 12px;
    border-radius: 999px;
    border: 1px solid #fff;
    overflow: visible;
    background: transparent;
}

.loader-bar-fill {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    background: #fff;
    border-radius: 999px;
    transform-origin: left center;
    transform: scaleX(0);
    will-change: transform;
    z-index: 1
}

.loader-ball {
    position: absolute;
    top: 50%;
    left: 0;
    width: 38px;
    height: auto;
    transform: translate3d(-50%, -50%, 0) rotate(0deg);
    will-change: transform;
    pointer-events: none;
    user-select: none;
    z-index: 3;
}

@media (max-width: 1150px) {

    html,
    body {
        background: var(--rossoblu-stripes);
        background-size: 100% 70%;
        background-attachment: scroll;
    }

    .intro-frame {
        top: 0;
        height: 100svh;
        width: 100%;
    }

    .intro-stage {
        position: relative;
        width: min(95vw, calc(95svh * 16 / 9));
        aspect-ratio: 16 / 9;
    }

    .info-text {
        transform: translate(-50%, -50%);
    }

    .info-text h2 {
        margin: 0 0 0.2rem;
        font-size: 12px;
        letter-spacing: 0.08em;
    }

    .info-text p {
        margin: 0 0 0.3rem;
        font-size: 7px;
        line-height: 1;
    }

    .info-overlay {
        transform: translate(-50%, -50%) scale(0.95);
    }

    .loader-text {
        margin: 0 0 1.05rem;
        font-size: 1.2rem;
        letter-spacing: 0.08em;
    }

    .scroll-hint {
        gap: 10px;
        font-size: 0.9rem;
        letter-spacing: 0.05em;
    }

    .info-btn {
        position: absolute;
        left: 1%;
        bottom: 10%;
        width: clamp(40px, 5vw, 56px);
    }
}

@media (hover: hover) and (pointer: fine) {
    .info-btn:hover {
        transform: translateY(25px) scale(1.12);
        filter: brightness(1.1);
    }

    .sound-btn-wrapper:hover .sound-btn {
        transform: scale(1.12);
        filter: brightness(1.1);
    }
}