:root {
    --bg: #05080c;
    --text: #f1f4f7;
    --muted: #a7b0ba;
    --line: rgba(255,255,255,.22);
    --accent: #58a8ff;
    --accent-strong: #8bc7ff;
    --card: rgba(5, 10, 16, .78);
    --section-bg: #071019;
    --shadow: 0 20px 60px rgba(0,0,0,.35);
}

html[data-theme="light"] {
    --bg: #f4f6f8;
    --text: #101419;
    --muted: #59636d;
    --line: rgba(0,0,0,.18);
    --accent: #1769aa;
    --accent-strong: #0c82d6;
    --card: rgba(255,255,255,.84);
    --section-bg: #eef2f5;
    --shadow: 0 20px 60px rgba(20,30,40,.12);
}

* { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    background: var(--bg);
}

body {
    margin: 0;
    min-width: 320px;
    background: var(--bg);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    transition: background .35s ease, color .35s ease;
}

a { color: inherit; }

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

.site-shell {
    min-height: 100vh;
    overflow-x: hidden;
}

.topbar {
    position: absolute;
    z-index: 20;
    top: 0;
    left: 0;
    right: 0;
    display: grid;
    grid-template-columns: 250px 1fr 250px;
    align-items: start;
    gap: 24px;
    padding: 32px 4vw;
}

.brand {
    display: flex;
    flex-direction: column;
    width: max-content;
    text-decoration: none;
    font-size: 30px;
    line-height: .96;
    letter-spacing: .15em;
    font-weight: 300;
}

.nav {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: 4px;
    padding: 6px;
    border: 1px solid rgba(88,168,255,.48);
    border-radius: 40px;
    background: rgba(2, 8, 13, .24);
    backdrop-filter: blur(14px);
}

.nav-link {
    position: relative;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 22px;
    color: rgba(255,255,255,.82);
    text-decoration: none;
    text-align: center;
    font-size: 12px;
    line-height: 1.05;
    letter-spacing: .08em;
    white-space: nowrap;
    border-radius: 28px;
    transition: color .2s ease, background .2s ease, box-shadow .2s ease;
}

.nav-link::after {
    content: "";
    position: absolute;
    bottom: 7px;
    width: 5px;
    height: 2px;
    border-radius: 2px;
    background: transparent;
}

.nav-link:hover,
.nav-link.active {
    color: #fff;
    background: rgba(88,168,255,.13);
    box-shadow: inset 0 0 18px rgba(88,168,255,.10);
}

.nav-link.active::after {
    background: var(--accent-strong);
    box-shadow: 0 0 8px var(--accent);
}

.top-actions {
    display: flex;
    justify-content: flex-end;
    align-items: flex-start;
    gap: 16px;
}

.icon-button {
    width: 48px;
    height: 48px;
    border: 0;
    border-left: 1px solid var(--line);
    border-right: 1px solid var(--line);
    background: transparent;
    cursor: pointer;
    display: grid;
    place-items: center;
}

.search-icon {
    width: 17px;
    height: 17px;
    border: 2px solid currentColor;
    border-radius: 50%;
    position: relative;
    display: block;
}

.search-icon::after {
    content: "";
    position: absolute;
    width: 7px;
    height: 2px;
    background: currentColor;
    right: -6px;
    bottom: -3px;
    transform: rotate(48deg);
    transform-origin: left center;
}

.theme-toggle {
    position: relative;
    height: 52px;
    border: 0;
    padding: 0 8px;
    display: flex;
    align-items: center;
    gap: 7px;
    color: inherit;
    background: transparent;
    cursor: pointer;
}

.theme-toggle .sun,
.theme-toggle .moon {
    font-size: 18px;
    opacity: .8;
}

.toggle-track {
    width: 58px;
    height: 32px;
    padding: 3px;
    border: 1px solid var(--accent);
    border-radius: 30px;
    background: rgba(88,168,255,.12);
    box-shadow: 0 0 18px rgba(88,168,255,.14);
}

.toggle-thumb {
    display: block;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #f7fbff;
    box-shadow: 0 2px 10px rgba(0,0,0,.35);
    transform: translateX(25px);
    transition: transform .25s ease;
}

html[data-theme="light"] .toggle-thumb {
    transform: translateX(0);
}

.toggle-label {
    position: absolute;
    top: 45px;
    right: 0;
    font-size: 10px;
    letter-spacing: .16em;
    white-space: nowrap;
}

.hero {
    position: relative;
    min-height: 100svh;
    isolation: isolate;
    background: #05080c url("../assets/hero.png?v=2") center center / cover no-repeat;
}

html[data-theme="light"] .hero {
    background-color: #dbe2e8;
    filter: saturate(.82) brightness(1.12);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    z-index: -1;
    background:
        linear-gradient(90deg, rgba(0,0,0,.30) 0%, rgba(0,0,0,.04) 62%, rgba(0,0,0,.28) 100%),
        linear-gradient(180deg, rgba(0,0,0,.18) 0%, transparent 30%, rgba(0,0,0,.28) 100%);
    pointer-events: none;
}

.hero-copy {
    position: absolute;
    left: 16.2%;
    top: 25%;
    max-width: 520px;
}

.eyebrow,
.section-kicker {
    margin: 0 0 18px;
    font-size: 12px;
    letter-spacing: .38em;
    color: var(--muted);
}

.hero-copy h1 {
    margin: 0;
    font-size: clamp(58px, 6.1vw, 105px);
    line-height: .88;
    letter-spacing: .08em;
    font-weight: 300;
}

.title-rule {
    display: block;
    width: 46px;
    height: 1px;
    margin: 30px 0 30px;
    background: currentColor;
}

.hero-description {
    margin: 0;
    color: rgba(240,245,250,.82);
    font-size: clamp(16px, 1.35vw, 22px);
    line-height: 1.5;
    font-weight: 300;
}

.journey-link {
    display: inline-flex;
    align-items: center;
    gap: 22px;
    margin-top: 36px;
    text-decoration: none;
    font-size: 12px;
    letter-spacing: .23em;
    font-weight: 500;
}

.arrow-circle {
    display: grid;
    place-items: center;
    width: 52px;
    height: 52px;
    border: 1px solid var(--accent);
    border-radius: 50%;
    color: #fff;
    font-size: 24px;
    letter-spacing: 0;
    transition: transform .2s ease, background .2s ease;
}

.journey-link:hover .arrow-circle {
    transform: translateX(5px);
    background: rgba(88,168,255,.16);
}

.left-rail {
    position: absolute;
    left: 4vw;
    top: 29%;
    display: flex;
    align-items: center;
    gap: 12px;
}

.rail-line {
    width: 1px;
    height: 365px;
    background: linear-gradient(transparent, rgba(255,255,255,.45), transparent);
}

.rail-text {
    font-size: 10px;
    letter-spacing: .22em;
    line-height: 1.65;
    color: rgba(255,255,255,.75);
}

.hero-markers {
    position: absolute;
    left: 4vw;
    bottom: 11%;
    display: flex;
    flex-direction: column;
    gap: 10px;
    font-size: 10px;
    letter-spacing: .1em;
}

.marker {
    color: rgba(255,255,255,.42);
}

.marker.active {
    color: #fff;
}

.marker.active::before {
    content: "";
    display: inline-block;
    width: 32px;
    height: 1px;
    margin-right: 9px;
    vertical-align: middle;
    background: var(--accent);
}

.construction-card {
    position: absolute;
    right: 4vw;
    bottom: 11%;
    width: min(480px, 34vw);
    display: grid;
    grid-template-columns: 1fr 112px;
    padding: 22px;
    border: 1px solid rgba(88,168,255,.48);
    border-radius: 12px;
    background: var(--card);
    backdrop-filter: blur(14px);
    box-shadow: var(--shadow);
}

.construction-title {
    display: flex;
    align-items: center;
    gap: 14px;
}

.tool-icon {
    font-size: 25px;
    color: #ffb000;
}

.construction-title h2 {
    margin: 0;
    font-size: 16px;
    line-height: 1.25;
    letter-spacing: .16em;
    font-weight: 500;
}

.construction-main p {
    margin: 18px 0 12px;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.6;
}

.status-line {
    display: block;
    width: 44px;
    height: 3px;
    background: #ffb000;
}

.construction-side {
    border-left: 1px solid var(--line);
    padding-left: 24px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    font-size: 9px;
    letter-spacing: .22em;
    color: var(--muted);
}

.side-rule {
    width: 40px;
    height: 1px;
    margin-top: 16px;
    background: currentColor;
}

.quote {
    position: absolute;
    right: 4vw;
    bottom: 4.5%;
    margin: 0;
    font-size: 13px;
    font-style: italic;
    color: rgba(255,255,255,.75);
}

.bottom-tags {
    position: absolute;
    left: 4vw;
    bottom: 4.5%;
    display: flex;
    gap: 24px;
    font-size: 9px;
    letter-spacing: .28em;
    color: rgba(255,255,255,.62);
}

.content-section {
    min-height: 70vh;
    padding: 120px max(8vw, 32px);
    background: var(--section-bg);
    border-top: 1px solid var(--line);
    scroll-margin-top: 40px;
}

.content-section h2 {
    max-width: 900px;
    margin: 0 0 24px;
    font-size: clamp(38px, 5vw, 76px);
    line-height: .98;
    font-weight: 300;
    letter-spacing: .02em;
}

.content-section > p:last-child {
    max-width: 720px;
    margin: 0;
    color: var(--muted);
    font-size: 18px;
    line-height: 1.75;
}

.footer {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding: 26px 4vw;
    background: var(--bg);
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 9px;
    letter-spacing: .2em;
}

@media (max-width: 1100px) {
    .topbar {
        grid-template-columns: 180px 1fr;
    }

    .top-actions {
        grid-column: 2;
        grid-row: 1;
        position: absolute;
        right: 4vw;
    }

    .nav {
        margin-top: 70px;
        grid-column: 1 / -1;
        justify-content: flex-start;
        overflow-x: auto;
    }

    .hero-copy {
        left: 10%;
        top: 34%;
    }

    .construction-card {
        width: min(440px, 46vw);
    }
}

@media (max-width: 760px) {
    .topbar {
        display: block;
        padding: 22px 20px;
    }

    .brand {
        font-size: 22px;
    }

    .top-actions {
        position: absolute;
        top: 18px;
        right: 20px;
    }

    .icon-button {
        display: none;
    }

    .toggle-label {
        display: none;
    }

    .nav {
        margin-top: 18px;
        gap: 0;
        padding: 4px;
        overflow-x: auto;
        justify-content: flex-start;
        scrollbar-width: none;
    }

    .nav::-webkit-scrollbar { display: none; }

    .nav-link {
        min-height: 42px;
        padding: 0 13px;
        font-size: 9px;
    }

    .hero {
        min-height: 920px;
        background-position: 60% center;
    }

    .hero-copy {
        left: 8%;
        right: 8%;
        top: 32%;
    }

    .hero-copy h1 {
        font-size: clamp(50px, 15vw, 78px);
    }

    .hero-description br {
        display: none;
    }

    .left-rail,
    .hero-markers,
    .bottom-tags {
        display: none;
    }

    .construction-card {
        left: 8%;
        right: 8%;
        bottom: 7%;
        width: auto;
        grid-template-columns: 1fr;
    }

    .construction-side {
        display: none;
    }

    .quote {
        left: 8%;
        right: auto;
        bottom: 3%;
        font-size: 11px;
    }

    .content-section {
        min-height: auto;
        padding: 90px 8%;
    }

    .footer {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition: none !important; }
}