:root {
    --bg: #000000;
    --fg: #f5f5f5;
    --muted: #cfcfcf;
    --panel: #111111;
    --panel-edge: rgba(255, 255, 255, 0.08);
    --font-body: "Inter", "Avenir Next", "Segoe UI", Arial, sans-serif;
    --font-display: "Plus Jakarta Sans", "Inter", "Avenir Next", "Segoe UI", Arial, sans-serif;
    --surface: #000000;
    --surface-border: #f5f5f5;
    --surface-shadow: none;
    --surface-radius: 18px;
    --surface-text: #ffffff;
    --surface-muted: rgba(255, 255, 255, 0.7);
    --viewport-height: 100vh;
    --motion-unit: 1vh;
    --edge-space: clamp(20px, 4vw, 48px);
    --headline-spacing-tighten: 0.06em;
    --logo-offset-start: calc(24 * var(--motion-unit));
    --logo-phase-one-travel: calc(10 * var(--motion-unit));
    --logo-phase-two-travel: calc(12 * var(--motion-unit));
    --headline-move-one: calc(-6.5 * var(--motion-unit));
    --headline-move-two: calc(10 * var(--motion-unit));
    --headline-scale-one: 0.06;
    --headline-scale-two: 0.08;
    --headline-clip-left: 42%;
    --headline-clip-right: 42%;
    --headline-fade-one: 1;
    --headline-fade-two: 0;
    --header-clearance: clamp(188px, 26vh, 248px);
    --collapse-top: clamp(164px, 21vh, 204px);
    --collapse-offset-start: calc(32 * var(--motion-unit));
    --collapse-rise-one: calc(18 * var(--motion-unit));
    --collapse-rise-two: calc(14 * var(--motion-unit));
    --collapse-scale-base: 0.84;
    --collapse-scale-one: 0.1;
    --collapse-scale-two: 0.06;
    --collapse-spacing-base: 0.22em;
    --collapse-spacing-one: 0.08em;
    --collapse-spacing-two: 0.06em;
    --collapse-opacity-one: 0.7;
    --collapse-opacity-two: 0.3;
    --phase-one-end: 0.58;
    --site-header-height: clamp(92px, 12vh, 118px);
}
@supports (height: 100svh) {
    :root {
        --viewport-height: 100svh;
        --motion-unit: 1svh;
    }
}

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

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--fg);
    line-height: 1;
    overflow-x: hidden;
}

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 20;
    opacity: 0;
    transform: translateY(-100%);
    pointer-events: none;
    transition: transform 0.24s ease, opacity 0.24s ease;
    background: rgba(0, 0, 0, 0.94);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-header.is-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.site-header-inner {
    width: min(1120px, calc(100% - (2 * var(--edge-space))));
    min-height: var(--site-header-height);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

.site-header-brand {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: clamp(2px, 0.8vw, 8px);
    color: var(--fg);
    text-decoration: none;
    font-family: var(--font-display);
    font-size: clamp(17px, 2.25vw, 30px);
    font-weight: 600;
    letter-spacing: 0.08em;
    line-height: 1;
}

.site-header-logo {
    width: clamp(30px, 4vw, 44px);
    height: auto;
    display: block;
}

.language-switcher {
    position: fixed;
    top: clamp(16px, 2.5vw, 24px);
    right: var(--edge-space);
    z-index: 30;
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 4px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 999px;
    background: rgba(0, 0, 0, 0.88);
    backdrop-filter: blur(14px);
}

.language-option {
    min-width: 40px;
    padding: 9px 11px;
    border-radius: 999px;
    color: var(--muted);
    text-decoration: none;
    text-align: center;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.08em;
    line-height: 1;
    transition: color 0.2s ease, background 0.2s ease;
}

.language-option:hover,
.language-option:focus-visible {
    color: var(--fg);
}

.language-option[aria-current="page"] {
    background: var(--fg);
    color: var(--bg);
}

.scroll-stage {
    background: var(--bg);
}

.hero-stage {
    min-height: calc(var(--viewport-height) * 2.2);
    background: var(--bg);
    --progress: 0;
    --phase-one: 0;
    --phase-two: 0;
}

.hero-stage.is-header-handoff .logo,
.hero-stage.is-header-handoff .hero-wordmark {
    opacity: 0;
}

.hero {
    position: sticky;
    top: 0;
    min-height: var(--viewport-height);
    padding: var(--edge-space);
    overflow: hidden;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.98) 0%, rgba(0, 0, 0, 0.95) 70%, rgba(0, 0, 0, 0.9) 100%);
    z-index: 1;
    pointer-events: none;
}

.hero-content {
    min-height: calc(var(--viewport-height) - (2 * var(--edge-space)));
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
}

.logo {
    width: clamp(96px, 11vw, 140px);
    height: auto;
    display: block;
    position: absolute;
    top: clamp(18px, 4vh, 36px);
    left: 50%;
    transform:
        translate3d(
            -50%,
            calc(var(--logo-offset-start) - (var(--phase-one) * var(--logo-phase-one-travel)) - (var(--phase-two) * var(--logo-phase-two-travel))),
            0
        )
        scale(calc(1 - (var(--phase-two) * 0.12)));
    will-change: transform;
}

.headline-wrap {
    position: absolute;
    inset: 0;
    width: 100%;
    min-height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

h1 {
    font-size: clamp(36px, 5.6vw, 84px);
    font-weight: 500;
    font-family: var(--font-display);
    position: absolute;
    left: 50%;
    top: 50%;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    transform:
        translate3d(
            -50%,
            calc(-50% + (var(--phase-one) * var(--headline-move-one)) - (var(--phase-two) * var(--headline-move-two))),
            0
        )
        scale(calc(1 - (var(--phase-one) * var(--headline-scale-one)) - (var(--phase-two) * var(--headline-scale-two))));
    transform-origin: center center;
    will-change: transform;
}

.headline-full,
.hero-wordmark {
    position: absolute;
    left: 50%;
    top: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    transform: translate(-50%, -50%);
}

.headline-full {
    color: var(--fg);
    letter-spacing: calc(-0.03em - (var(--phase-one) * var(--headline-spacing-tighten)));
    clip-path: inset(0 calc(var(--phase-one) * var(--headline-clip-right)) 0 calc(var(--phase-one) * var(--headline-clip-left)));
    opacity: calc(1 - (var(--phase-one) * var(--headline-fade-one)) - (var(--phase-two) * var(--headline-fade-two)));
    will-change: opacity, letter-spacing, clip-path;
}

.hero-wordmark {
    color: var(--fg);
    font-size: clamp(18px, 2.5vw, 34px);
    font-weight: 600;
    font-family: var(--font-display);
    position: absolute;
    top: var(--collapse-top);
    transform:
        translate3d(
            -50%,
            calc(-50% + var(--collapse-offset-start) - (var(--phase-one) * var(--collapse-rise-one)) - (var(--phase-two) * var(--collapse-rise-two))),
            0
        )
        scale(calc(var(--collapse-scale-base) + (var(--phase-one) * var(--collapse-scale-one)) + (var(--phase-two) * var(--collapse-scale-two))));
    letter-spacing: calc(var(--collapse-spacing-base) - (var(--phase-one) * var(--collapse-spacing-one)) - (var(--phase-two) * var(--collapse-spacing-two)));
    opacity: calc((var(--phase-one) * var(--collapse-opacity-one)) + (var(--phase-two) * var(--collapse-opacity-two)));
    will-change: transform, opacity, letter-spacing;
}

.second-page {
    min-height: var(--viewport-height);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: calc(var(--site-header-height) + clamp(32px, 6vw, 72px)) clamp(32px, 6vw, 72px) clamp(32px, 6vw, 72px);
    position: relative;
    z-index: 2;
}

.second-page-content {
    width: min(1040px, 100%);
    display: grid;
    gap: clamp(24px, 4vw, 48px);
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
}

.second-page-intro h2 {
    font-size: clamp(32px, 5vw, 64px);
    line-height: 0.95;
    letter-spacing: -0.04em;
    margin-bottom: 20px;
    font-family: var(--font-display);
}

.second-page-intro p,
.second-page-card p {
    color: var(--muted);
    line-height: 1.5;
    font-size: clamp(16px, 1.6vw, 20px);
}

.second-page-grid {
    display: grid;
    gap: 18px;
}

.section-jump {
    grid-column: 1 / -1;
    justify-self: center;
    align-self: center;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: fit-content;
    margin: 10px auto 0;
    padding: 14px 22px;
    border-radius: 999px;
    border: 1px solid var(--fg);
    background: var(--bg);
    color: #ffffff;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
    cursor: pointer;
    text-align: center;
}

.section-jump:hover {
    transform: translateY(-2px);
    border-color: var(--fg);
    background: var(--bg);
}

.third-page {
    min-height: var(--viewport-height);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: calc(var(--site-header-height) + clamp(32px, 6vw, 72px)) clamp(32px, 6vw, 72px) clamp(32px, 6vw, 72px);
    scroll-margin-top: calc(var(--site-header-height) + 24px);
    position: relative;
    z-index: 2;
}

.third-page-card {
    width: min(720px, 100%);
    padding: clamp(28px, 4vw, 44px);
    background: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: var(--surface-radius);
    box-shadow: var(--surface-shadow);
    text-align: center;
}

.third-page-card h2 {
    font-size: clamp(34px, 5vw, 64px);
    line-height: 0.95;
    letter-spacing: -0.04em;
    margin-bottom: 18px;
    font-family: var(--font-display);
}

.third-page-card p {
    color: var(--muted);
    line-height: 1.6;
    font-size: clamp(16px, 1.6vw, 20px);
    max-width: 560px;
    margin: 0 auto 28px;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 24px;
    border-radius: 999px;
    border: 1px solid var(--fg);
    color: var(--surface-text);
    text-decoration: none;
    font-family: var(--font-display);
    font-size: clamp(16px, 2vw, 22px);
    letter-spacing: -0.02em;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
    cursor: pointer;
    background: var(--bg);
}

.contact-link:hover {
    transform: translateY(-2px);
    border-color: var(--fg);
    background: var(--bg);
}

.second-page-card {
    padding: clamp(20px, 3vw, 28px);
    background: var(--surface);
    border: 1px solid var(--surface-border);
    border-radius: var(--surface-radius);
    box-shadow: var(--surface-shadow);
}

.second-page-card h3 {
    font-size: clamp(18px, 2vw, 24px);
    margin-bottom: 10px;
    font-family: var(--font-display);
    color: var(--surface-text);
}

.second-page-card p {
    color: var(--muted);
}

.second-page-card h3 {
    letter-spacing: -0.015em;
}

.site-footer {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 28px var(--edge-space) 40px;
    background: #000000;
}

.footer-nav {
    width: min(1120px, 100%);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(18px, 4vw, 40px);
    flex-wrap: wrap;
}

.footer-link {
    color: #ffffff;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.footer-link:hover {
    text-decoration: underline;
    text-underline-offset: 4px;
}

@media (max-width: 780px) {
    :root {
        --headline-spacing-tighten: 0.035em;
        --headline-move-one: calc(-18 * var(--motion-unit));
        --headline-move-two: calc(7 * var(--motion-unit));
        --headline-scale-one: 0.04;
        --headline-scale-two: 0.05;
        --headline-clip-left: 36%;
        --headline-clip-right: 36%;
        --header-clearance: clamp(156px, 24vh, 204px);
        --collapse-top: clamp(136px, 19vh, 170px);
        --collapse-offset-start: calc(24 * var(--motion-unit));
        --collapse-rise-one: calc(13 * var(--motion-unit));
        --collapse-rise-two: calc(11 * var(--motion-unit));
        --collapse-scale-base: 0.9;
        --collapse-scale-one: 0.05;
        --collapse-scale-two: 0.03;
        --collapse-spacing-base: 0.16em;
        --collapse-spacing-one: 0.05em;
        --collapse-spacing-two: 0.04em;
        --logo-offset-start: calc(18 * var(--motion-unit));
        --logo-phase-one-travel: calc(7 * var(--motion-unit));
        --logo-phase-two-travel: calc(9 * var(--motion-unit));
    }

    .logo {
        width: clamp(84px, 24vw, 120px);
    }

    h1 {
        font-size: clamp(28px, 8.8vw, 52px);
    }

    .headline-collapse {
        font-size: clamp(16px, 4.6vw, 24px);
    }

    .headline-full {
        clip-path: none;
        letter-spacing: -0.03em;
        will-change: opacity;
    }

    .hero-wordmark {
        letter-spacing: var(--collapse-spacing-base);
        will-change: transform, opacity;
    }

    .second-page-content {
        grid-template-columns: 1fr;
    }

    .section-jump,
    .contact-link {
        width: 100%;
    }

    .footer-nav {
        justify-content: flex-start;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .logo,
    h1,
    .headline-full,
    .hero-wordmark,
    .section-jump,
    .contact-link,
    .language-option {
        transition: none;
    }
}