/* ==========================================================================
   unitree-robotics.de — Stylesheet
   Palette aus dem Hero abgeleitet: Schwarz, Stahl, Augenblau.
   ========================================================================== */

/* Schriften ---------------------------------------------------------------
   Keine Einbindung von Google Fonts (kein Aufruf externer Server, DSGVO).
   Liegen die Dateien in assets/fonts/, werden sie genutzt – sonst greift
   automatisch die System-Alternative aus dem Stack weiter unten.
   -------------------------------------------------------------------------- */

@font-face {
    font-family: "Barlow Condensed";
    src: local("Barlow Condensed SemiBold"), local("BarlowCondensed-SemiBold"),
         url("../fonts/BarlowCondensed-SemiBold.woff2") format("woff2");
    font-weight: 600;
    font-display: swap;
}

@font-face {
    font-family: "Barlow Condensed";
    src: local("Barlow Condensed"), local("BarlowCondensed-Regular"),
         url("../fonts/BarlowCondensed-Regular.woff2") format("woff2");
    font-weight: 400;
    font-display: swap;
}

@font-face {
    font-family: "IBM Plex Mono";
    src: local("IBM Plex Mono"), url("../fonts/IBMPlexMono-Regular.woff2") format("woff2");
    font-weight: 400;
    font-display: swap;
}

@font-face {
    font-family: "IBM Plex Sans";
    src: local("IBM Plex Sans"), url("../fonts/IBMPlexSans-Regular.woff2") format("woff2");
    font-weight: 400;
    font-display: swap;
}

:root {
    --ink:      #050506;   /* Seitenhintergrund, identisch mit dem Hero-Bild */
    --steel:    #cfd4d9;   /* Fließtext */
    --iron:     #6c747d;   /* Sekundär */
    --edge:     #1a1d21;   /* Haarlinien */
    --eye:      #86b8ff;   /* Akzent, Farbe der Roboteraugen */

    --shell:    min(1180px, 92vw);
    --gap:      clamp(2rem, 6vw, 5rem);

    --display:  "Barlow Condensed", "Oswald", "Arial Narrow", "Helvetica Neue", sans-serif;
    --body:     "IBM Plex Sans", system-ui, "Segoe UI", Roboto, sans-serif;
    --mono:     "IBM Plex Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--ink);
    color: var(--steel);
    font-family: var(--body);
    font-size: clamp(0.95rem, 0.9rem + 0.2vw, 1.05rem);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }

a { color: inherit; }

:focus-visible {
    outline: 2px solid var(--eye);
    outline-offset: 4px;
}

.skip {
    position: absolute;
    left: -9999px;
}
.skip:focus {
    left: 1rem;
    top: 1rem;
    z-index: 10;
    padding: 0.6rem 1rem;
    background: var(--eye);
    color: var(--ink);
    font-family: var(--mono);
    font-size: 0.8rem;
}

/* Layout ------------------------------------------------------------------ */

.frame {
    width: var(--shell);
    margin-inline: auto;
    min-height: 100svh;
    padding-block: clamp(1.25rem, 4vw, 2.5rem) clamp(1.5rem, 4vw, 3rem);
    display: flex;
    flex-direction: column;
}

main { flex: 1; }

/* Kopfzeile --------------------------------------------------------------- */

.masthead {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 0.5rem 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--edge);
}

.mark {
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.mark--muted { color: var(--iron); }

/* Hero -------------------------------------------------------------------- */

.hero {
    position: relative;
    margin: 0;
}

.hero__img {
    width: 100%;
    /* Das Bild ist auf Schwarz freigestellt – es geht ohne Kante in die Seite über. */
    mask-image:
        radial-gradient(88% 78% at 50% 40%, #000 42%, transparent 88%),
        linear-gradient(to bottom, #000 55%, transparent 96%);
    mask-composite: intersect;
    -webkit-mask-image:
        radial-gradient(88% 78% at 50% 40%, #000 42%, transparent 88%),
        linear-gradient(to bottom, #000 55%, transparent 96%);
    -webkit-mask-composite: source-in;
}

/* Verlauf, damit die Wortmarke auf ruhigem Grund steht */
.hero::after {
    content: "";
    position: absolute;
    inset: auto 0 0 0;
    height: 52%;
    z-index: 1;
    background: linear-gradient(to top, rgba(5, 5, 6, 0.94) 12%, rgba(5, 5, 6, 0) 100%);
    pointer-events: none;
}

.hero__title {
    position: absolute;
    z-index: 2;
    left: 0;
    bottom: clamp(0rem, 1vw, 0.75rem);
    display: flex;
    flex-direction: column;
    font-family: var(--display);
    font-weight: 600;
    font-size: clamp(3rem, 13.5vw, 12.5rem);
    line-height: 0.82;
    letter-spacing: -0.01em;
    text-transform: uppercase;
    pointer-events: none;
}

.hero__line--1 { color: var(--steel); }

.hero__line--2 {
    color: transparent;
    padding-left: 0.06em;
    -webkit-text-stroke: 1px var(--iron);
}

/* Hinweis ----------------------------------------------------------------- */

.notice {
    margin-top: clamp(1.75rem, 5vw, 3rem);
    padding-left: clamp(1rem, 2.5vw, 1.75rem);
    border-left: 2px solid var(--eye);
    max-width: 46ch;
}

.notice__eyebrow {
    margin: 0;
    font-family: var(--mono);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--eye);
}

.notice__headline {
    margin: 0.5rem 0 0;
    font-family: var(--display);
    font-weight: 600;
    font-size: clamp(1.9rem, 4.5vw, 3.25rem);
    line-height: 1.02;
    letter-spacing: 0.01em;
    text-transform: uppercase;
    color: var(--steel);
}

.notice__text {
    margin: 0.75rem 0 0;
    color: var(--iron);
    max-width: 42ch;
}

/* Kennzahlenzeile --------------------------------------------------------- */

.telemetry {
    margin: clamp(2rem, 6vw, 3.5rem) 0 0;
    padding-top: 1rem;
    border-top: 1px solid var(--edge);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.25rem;
}

.telemetry__cell dt {
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--iron);
}

.telemetry__cell dd {
    margin: 0.35rem 0 0;
    font-family: var(--display);
    font-size: 1.35rem;
    letter-spacing: 0.01em;
}

/* Weiterleitung ----------------------------------------------------------- */

.onward {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: end;
    gap: 0.25rem 1.5rem;
    margin-top: var(--gap);
    padding: clamp(1.25rem, 3vw, 1.75rem) 0;
    border-top: 1px solid var(--edge);
    border-bottom: 1px solid var(--edge);
    text-decoration: none;
    transition: border-color 0.25s ease, color 0.25s ease;
}

.onward__eyebrow {
    grid-column: 1;
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--iron);
}

.onward__label {
    grid-column: 1;
    font-family: var(--display);
    font-size: clamp(2.25rem, 7vw, 4rem);
    font-weight: 600;
    line-height: 1;
    text-transform: uppercase;
}

.onward__note {
    grid-column: 1;
    margin-top: 0.35rem;
    color: var(--iron);
}

.onward__arrow {
    grid-column: 2;
    grid-row: 1 / -1;
    align-self: center;
    color: var(--iron);
    transition: transform 0.25s ease, color 0.25s ease;
}

.onward:hover,
.onward:focus-visible {
    border-color: var(--eye);
    color: var(--eye);
}

.onward:hover .onward__arrow,
.onward:focus-visible .onward__arrow {
    color: var(--eye);
    transform: translateX(8px);
}

/* Fußzeile ---------------------------------------------------------------- */

.footer {
    margin-top: clamp(2rem, 5vw, 3.5rem);
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--iron);
}

/* Einblenden beim Laden --------------------------------------------------- */

.js .reveal {
    opacity: 0;
    transform: translateY(14px);
}

.js .reveal.is-in {
    opacity: 1;
    transform: none;
    transition: opacity 0.7s ease, transform 0.7s ease;
}

@media (max-width: 560px) {
    .onward { grid-template-columns: 1fr; }
    .onward__arrow { grid-column: 1; grid-row: auto; align-self: start; margin-top: 0.75rem; }
}

@media (prefers-reduced-motion: reduce) {
    .js .reveal,
    .js .reveal.is-in {
        opacity: 1;
        transform: none;
        transition: none;
    }
    .onward,
    .onward__arrow { transition: none; }
}