:root {
    --color-bg: #191b27;
    --color-surface: #202332;

    --color-primary: #2596be;
    --color-primary-bright: #37b7e5;

    --color-text: #f4f7f8;
    --color-text-muted: #9ba8b3;

    --color-border: rgba(37, 150, 190, 0.28);
    --color-border-strong: rgba(37, 150, 190, 0.68);

    --color-grid: rgba(37, 150, 190, 0.055);

    --container-width: 1440px;
    --header-height: 120px;
}


/* ----------------------------------------------------------
   Global
   ---------------------------------------------------------- */

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;

    min-height: 100vh;

    color: var(--color-text);

    background-color: var(--color-bg);

    background-image:
        linear-gradient(
            var(--color-grid) 1px,
            transparent 1px
        ),
        linear-gradient(
            90deg,
            var(--color-grid) 1px,
            transparent 1px
        );

    background-size: 40px 40px;

    font-family:
        Inter,
        "Segoe UI",
        Arial,
        sans-serif;

    overflow-x: hidden;
}

a {
    color: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--color-primary-bright);
    outline-offset: 4px;
}


/* ----------------------------------------------------------
   Header
   ---------------------------------------------------------- */

.site-header {
    position: relative;
    z-index: 1000;

    display: flex;
    align-items: center;
    justify-content: space-between;

    width: min(
        calc(100% - 5rem),
        var(--container-width)
    );

    min-height: var(--header-height);

    margin-inline: auto;

    border-bottom: 1px solid var(--color-border);
}


/* ----------------------------------------------------------
   Brand
   ---------------------------------------------------------- */

.site-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;

    text-decoration: none;

    letter-spacing: 0.14em;
    text-transform: uppercase;

    font-size: 0.9rem;
    font-weight: 700;
}

.site-brand__mark {
    width: 12px;
    height: 12px;

    background: var(--color-primary);

    transform: rotate(45deg);

    box-shadow:
        0 0 18px
        rgba(37, 150, 190, 0.45);
}


/* ----------------------------------------------------------
   Fan navigation
   ---------------------------------------------------------- */

.fan-nav {
    position: relative;

    width: 76px;
    height: 76px;

    margin-top: 0;
}

.fan-nav__menu {
    position: absolute;

    top: 50%;
    left: 50%;

    width: 1px;
    height: 1px;

    pointer-events: none;
}

/* ----------------------------------------------------------
   Fan arc
   ---------------------------------------------------------- */

.fan-nav__arc {
    display: none;
}

.fan-nav__arc-line {
    fill: none;

    stroke: var(--color-primary);

    stroke-width: 1;

    stroke-linecap: round;

    stroke-dasharray: 1;
    stroke-dashoffset: 1;

    opacity: 0.55;

    filter:
        drop-shadow(
            0 0 5px
            rgba(37, 150, 190, 0.25)
        );
}

.fan-nav__item {
    position: absolute;

    top: 0;
    left: 0;

    display: grid;

    grid-template-columns:
        10px
        28px
        1fr;

    align-items: center;

    gap: 0.7rem;

    width: 190px;
    min-width: 190px;
    min-height: 50px;

    padding:
        0.7rem
        1rem;

    border:
        1px solid
        var(--color-border);

    background:
        linear-gradient(
            110deg,
            rgba(37, 150, 190, 0.13),
            rgba(25, 27, 39, 0.96) 45%
        );

    color: var(--color-text);

    text-decoration: none;

    opacity: 0;

    pointer-events: none;

    transform:
        translate(-50%, -50%)
        scale(0.72);

    transform-origin: center;

    clip-path: polygon(
        0 0,
        calc(100% - 11px) 0,
        100% 11px,
        100% 100%,
        11px 100%,
        0 calc(100% - 11px)
    );

    backdrop-filter: blur(8px);

    transition:
        border-color 160ms ease,
        background 160ms ease;
}

.fan-nav__item::before {
    content: "";

    position: absolute;

    inset: 4px;

    border-left:
        1px solid
        rgba(37, 150, 190, 0.3);

    pointer-events: none;
}

.fan-nav__item:hover,
.fan-nav__item:focus-visible {
    border-color:
        var(--color-primary);

    background:
        linear-gradient(
            110deg,
            rgba(37, 150, 190, 0.28),
            rgba(25, 27, 39, 0.98) 50%
        );
}

.fan-nav__item:hover .fan-nav__node,
.fan-nav__item:focus-visible .fan-nav__node {
    background:
        var(--color-primary);

    box-shadow:
        0 0 12px
        rgba(37, 150, 190, 0.65);
}

.fan-nav__index {
    color: var(--color-primary);

    font-family:
        "Courier New",
        monospace;

    font-size: 0.65rem;
}

.fan-nav__label {
    white-space: nowrap;

    font-size: 0.76rem;

    letter-spacing: 0.1em;

    text-transform: uppercase;
}


/* ----------------------------------------------------------
   Fan trigger
   ---------------------------------------------------------- */

.fan-nav__trigger {
    position: relative;
    z-index: 20;

    display: grid;
    place-items: center;

    width: 76px;
    height: 76px;

    padding: 0;

    border:
        1px solid
        var(--color-primary);

    border-radius: 50%;

    background:
        radial-gradient(
            circle,
            var(--color-surface) 0%,
            var(--color-bg) 72%
        );

    color: var(--color-text);

    cursor: pointer;

    box-shadow:
        0 0 0 1px rgba(37, 150, 190, 0.08),
        0 0 28px rgba(37, 150, 190, 0.08);
}

.fan-nav__trigger::before {
    content: "";

    position: absolute;

    inset: 5px;

    border:
        1px solid
        rgba(37, 150, 190, 0.28);

    border-radius: inherit;
}

.fan-nav__trigger::after {
    content: "";

    position: absolute;

    inset: -10px;

    border:
        1px dashed
        rgba(37, 150, 190, 0.24);

    border-radius: inherit;

    pointer-events: none;
}

.fan-nav__trigger-core {
    position: relative;

    display: block;

    width: 22px;
    height: 22px;
}

.fan-nav__trigger-line {
    position: absolute;

    top: 50%;
    left: 50%;

    width: 20px;
    height: 1px;

    background: var(--color-primary-bright);

    transform-origin: center;
}

.fan-nav__trigger-line:first-child {
    transform:
        translate(-50%, -50%)
        rotate(0deg);
}

.fan-nav__trigger-line:last-child {
    transform:
        translate(-50%, -50%)
        rotate(90deg);
}

.fan-nav__trigger-text {
    position: absolute;

    bottom: -24px;

    color: var(--color-text-muted);

    font-family:
        "Courier New",
        monospace;

    font-size: 0.62rem;

    letter-spacing: 0.14em;

    text-transform: uppercase;
}


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

.hero {
    width: min(
        calc(100% - 3rem),
        var(--container-width)
    );

    min-height:
        calc(100vh - var(--header-height));

    margin-inline: auto;

    display: grid;
    align-items: center;

    padding-block: 4rem;
}

.hero__grid {
    display: grid;

    grid-template-columns:
        minmax(0, 1.05fr)
        minmax(320px, 0.95fr);

    gap: clamp(3rem, 8vw, 9rem);

    align-items: center;
}

.hero__content {
    max-width: 720px;
}

.hero__eyebrow,
.section-label {
    margin: 0 0 1.25rem;

    color: var(--color-primary);

    font-family:
        "Courier New",
        monospace;

    font-size: 0.72rem;

    letter-spacing: 0.16em;
}

.hero__title {
    margin: 0;

    max-width: 900px;

    font-size:
        clamp(
            3rem,
            6vw,
            6.7rem
        );

    line-height: 0.92;

    letter-spacing: -0.055em;

    font-weight: 650;
}

.hero__title span {
    display: block;

    color: var(--color-primary);
}

.hero__description {
    max-width: 600px;

    margin:
        clamp(2rem, 4vw, 3rem)
        0
        0;

    color: var(--color-text-muted);

    font-size:
        clamp(
            1rem,
            1.5vw,
            1.2rem
        );

    line-height: 1.75;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;

    gap: 1rem;

    margin-top: 2.5rem;
}


/* ----------------------------------------------------------
   Buttons
   ---------------------------------------------------------- */

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    min-height: 48px;

    padding-inline: 1.4rem;

    border:
        1px solid
        var(--color-border);

    text-decoration: none;

    text-transform: uppercase;

    letter-spacing: 0.08em;

    font-size: 0.75rem;

    clip-path: polygon(
        0 0,
        calc(100% - 10px) 0,
        100% 10px,
        100% 100%,
        0 100%
    );
}

.button--primary {
    background: var(--color-primary);

    border-color: var(--color-primary);

    color: #101820;
}

.button--secondary {
    background:
        rgba(25, 27, 39, 0.8);
}


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

.hero__visual {
    position: relative;

    aspect-ratio: 1;

    width:
        min(
            100%,
            540px
        );

    margin-inline: auto;
}

.signal-orbit {
    position: absolute;

    top: 50%;
    left: 50%;

    border:
        1px solid
        var(--color-border);

    border-radius: 50%;

    transform:
        translate(-50%, -50%);
}

.signal-orbit--outer {
    width: 100%;
    height: 100%;
}

.signal-orbit--middle {
    width: 70%;
    height: 70%;

    border-style: dashed;
}

.signal-orbit--inner {
    width: 40%;
    height: 40%;

    border-color: var(--color-primary);
}

.signal-core {
    position: absolute;

    top: 50%;
    left: 50%;

    width: 90px;
    height: 90px;

    display: grid;
    place-items: center;

    border:
        1px solid
        var(--color-primary);

    transform:
        translate(-50%, -50%)
        rotate(45deg);
}

.signal-core span {
    width: 18px;
    height: 18px;

    background: var(--color-primary);

    box-shadow:
        0 0 30px
        rgba(37, 150, 190, 0.7);
}

.signal-node {
    position: absolute;

    width: 10px;
    height: 10px;

    border-radius: 50%;

    background:
        var(--color-primary);
}

.signal-node--one {
    top: 10%;
    left: 48%;
}

.signal-node--two {
    right: 8%;
    top: 56%;
}

.signal-node--three {
    bottom: 14%;
    left: 24%;
}


/* ----------------------------------------------------------
   Sections
   ---------------------------------------------------------- */

.content-section {
    width: min(
        calc(100% - 3rem),
        var(--container-width)
    );

    min-height: 70vh;

    margin-inline: auto;

    padding-block: 8rem;

    border-top:
        1px solid
        var(--color-border);
}

.content-section h2 {
    margin: 0;

    font-size:
        clamp(
            2rem,
            5vw,
            5rem
        );
}


/* ----------------------------------------------------------
   Contact
   ---------------------------------------------------------- */

.home-contact {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(300px, 430px);
    align-items: center;
    gap: clamp(3rem, 8vw, 8rem);
}

.home-contact__intro {
    max-width: 720px;
}

.home-contact__intro > p:last-child {
    max-width: 620px;
    margin: 1.5rem 0 0;
    color: var(--color-text-muted);
    line-height: 1.75;
}

.home-contact__details {
    width: 100%;
    border-top: 1px solid var(--color-border);
}

.home-contact__detail {
    display: grid;
    grid-template-columns: 100px 1fr;
    align-items: center;
    gap: 1.5rem;
    min-height: 70px;
    border-bottom: 1px solid var(--color-border);
}

.home-contact__detail span {
    color: var(--color-primary);
    font-family: "Courier New", monospace;
    font-size: 0.62rem;
    letter-spacing: 0.14em;
}

.home-contact__detail a {
    color: var(--color-text);
    text-decoration: none;
    overflow-wrap: anywhere;
}

.home-contact__detail a:hover {
    color: var(--color-primary-bright);
}

.home-contact__detail p {
    margin: 0;
}


/* ----------------------------------------------------------
   Responsive
   ---------------------------------------------------------- */

@media (max-width: 900px) {

    .hero__grid {
        grid-template-columns: 1fr;
    }

    .hero__visual {
        max-width: 420px;
    }

    .home-contact {
        grid-template-columns: 1fr;
    }

}

@media (max-width: 600px) {

    :root {
        --header-height: 82px;
    }

    .site-header,
    .hero,
    .content-section {
        width: min(
            calc(100% - 2rem),
            var(--container-width)
        );
    }

    .fan-nav,
    .fan-nav__trigger {
        width: 64px;
        height: 64px;
    }

    .fan-nav__item {
        width: 160px;
        min-width: 160px;

        padding:
            0.55rem
            0.7rem;
    }

    .hero {
        min-height: auto;

        padding-block:
            5rem
            4rem;
    }

    .home-contact__detail {
        grid-template-columns: 1fr;
        gap: 0.4rem;
        padding-block: 1rem;
    }

}


/* ----------------------------------------------------------
   Reduced motion
   ---------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {

    html {
        scroll-behavior: auto;
    }

}