:root {
    --background: #071016;
    --background-light: #0c171e;
    --surface: #101e26;
    --text: #eef4f7;
    --muted: #9baeb8;
    --accent: #62d8c3;
    --border: rgba(255, 255, 255, 0.10);

    --max-width: 1180px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--background);
    color: var(--text);
    font-family:
        Inter,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    width: min(90%, var(--max-width));
    margin: 0 auto;
}


/* =============================
   HEADER
============================= */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;

    background: rgba(7, 16, 22, 0.88);
    backdrop-filter: blur(14px);

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

.nav-container {
    height: 76px;

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

.logo {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.logo-secure {
    color: var(--text);
}

.logo-number {
    color: var(--accent);
    margin-left: 3px;
}

.navigation {
    display: flex;
    gap: 32px;
}

.navigation a {
    color: var(--muted);
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

.navigation a:hover {
    color: var(--text);
}

.menu-toggle {
    display: none;

    border: none;
    background: transparent;

    color: var(--text);

    font-size: 1.5rem;

    cursor: pointer;
}


/* =============================
   HERO
============================= */

.hero {
    min-height: 100vh;

    display: flex;
    align-items: center;

    padding-top: 76px;

    background:
        radial-gradient(
            circle at 75% 45%,
            rgba(98, 216, 195, 0.08),
            transparent 32%
        );
}

.hero-grid {
    width: min(90%, 1400px);
    margin: 0 auto;

    display: grid;
    grid-template-columns: 1.1fr 0.9fr;

    align-items: center;

    gap: 80px;
}

.eyebrow,
.section-label {
    color: var(--accent);

    font-size: 0.72rem;
    font-weight: 700;

    letter-spacing: 0.18em;
}

.hero h1 {
    max-width: 800px;

    margin-top: 18px;

    font-size: clamp(3.5rem, 7vw, 7rem);

    line-height: 0.98;

    letter-spacing: -0.05em;
}

.hero h1 span {
    display: block;
    color: var(--accent);
}

.hero-description {
    max-width: 650px;

    margin-top: 32px;

    color: var(--muted);

    font-size: 1.25rem;

    line-height: 1.7;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;

    gap: 14px;

    margin-top: 38px;
}


/* =============================
   BUTTONS
============================= */

.button {
    display: inline-flex;

    align-items: center;
    justify-content: center;

    padding: 13px 22px;

    border-radius: 4px;

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

    transition:
        transform 0.2s ease,
        background 0.2s ease;
}

.button:hover {
    transform: translateY(-2px);
}

.button-primary {
    background: var(--accent);
    color: #061014;
}

.button-primary:hover {
    background: #7de6d2;
}

.button-secondary {
    border: 1px solid var(--border);
    color: var(--text);
}

.button-secondary:hover {
    background: var(--surface);
}


/* =============================
   MISSION GRAPHIC
============================= */

.hero-graphic {
    position: relative;

    width: min(520px, 100%);

    aspect-ratio: 1;

    display: flex;

    align-items: center;
    justify-content: center;
}

.orbit {
    position: absolute;

    width: 75%;
    height: 75%;

    border: 1px solid rgba(98, 216, 195, 0.18);

    border-radius: 50%;
}

.orbit-one {
    transform: rotate(15deg) scaleX(1.4);
}

.orbit-two {
    transform: rotate(-35deg) scaleX(1.25);
}

.orbit-three {
    width: 90%;
    height: 50%;

    transform: rotate(45deg);
}

.mission-node {
    width: 150px;
    height: 150px;

    border: 1px solid rgba(98, 216, 195, 0.45);

    border-radius: 50%;

    display: flex;

    flex-direction: column;

    align-items: center;
    justify-content: center;

    background: rgba(16, 30, 38, 0.8);

    box-shadow:
        0 0 60px rgba(98, 216, 195, 0.08);
}

.node-core {
    width: 18px;
    height: 18px;

    margin-bottom: 14px;

    border-radius: 50%;

    background: var(--accent);

    box-shadow:
        0 0 25px rgba(98, 216, 195, 0.7);
}

.mission-node span {
    font-size: 0.65rem;

    letter-spacing: 0.2em;

    font-weight: 700;
}


/* =============================
   SECTIONS
============================= */

.section {
    padding: 130px 0;
}

.intro {
    padding: 120px 0;

    background: var(--background-light);
}

.intro-grid,
.approach-grid,
.rd-grid,
.about-grid {
    display: grid;

    grid-template-columns: 1fr 1fr;

    gap: 100px;

    align-items: start;
}

h2 {
    margin-top: 16px;

    font-size: clamp(2.3rem, 4vw, 4rem);

    line-height: 1.08;

    letter-spacing: -0.04em;
}

.intro-text p,
.section-heading p,
.approach-content p,
.rd p,
.about p,
.contact p {
    color: var(--muted);

    font-size: 1.05rem;

    margin-bottom: 22px;
}


/* =============================
   CAPABILITIES
============================= */

.section-heading {
    max-width: 720px;

    margin-bottom: 60px;
}

.capability-grid {
    display: grid;

    grid-template-columns: repeat(2, 1fr);

    gap: 1px;

    background: var(--border);
}

.capability-card {
    min-height: 280px;

    padding: 38px;

    background: var(--background);

    transition:
        background 0.25s ease,
        transform 0.25s ease;
}

.capability-card:hover {
    background: var(--surface);
}

.card-number {
    color: var(--accent);

    font-size: 0.75rem;

    font-weight: 700;

    letter-spacing: 0.12em;
}

.capability-card h3 {
    margin-top: 35px;

    font-size: 1.35rem;
}

.capability-card p {
    margin-top: 14px;

    color: var(--muted);
}


/* =============================
   APPROACH
============================= */

.approach {
    background: var(--background-light);
}

.principles {
    margin-top: 40px;

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

.principles div {
    padding: 18px 0;

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

.principles strong {
    display: inline-block;

    width: 110px;
}

.principles span {
    color: var(--muted);
}


/* =============================
   R&D
============================= */

.rd {
    border-top: 1px solid var(--border);

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


/* =============================
   ABOUT
============================= */

.about {
    background: var(--background-light);
}


/* =============================
   CONTACT
============================= */

.contact {
    padding: 150px 0;

    text-align: center;

    background:
        radial-gradient(
            circle at center,
            rgba(98, 216, 195, 0.08),
            transparent 45%
        );
}

.contact-content {
    max-width: 760px;
}

.contact h2 {
    margin-bottom: 25px;
}

.contact p {
    max-width: 600px;

    margin: 0 auto 35px;
}


/* =============================
   FOOTER
============================= */

.site-footer {
    padding: 30px 0;

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

    color: var(--muted);

    font-size: 0.8rem;
}

.footer-content {
    display: flex;

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

    gap: 20px;
}

.footer-brand {
    color: var(--accent);

    font-weight: 800;

    letter-spacing: 0.08em;
}


/* =============================
   MOBILE
============================= */

@media (max-width: 850px) {

    .navigation {
        position: absolute;

        top: 76px;
        left: 0;
        right: 0;

        display: none;

        flex-direction: column;

        padding: 25px;

        background: var(--background);

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

    .navigation.active {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }

    .hero-grid,
    .intro-grid,
    .approach-grid,
    .rd-grid,
    .about-grid {
        grid-template-columns: 1fr;

        gap: 60px;
    }

    .hero {
        padding-top: 130px;

        padding-bottom: 80px;
    }

    .hero h1 {
        font-size: clamp(3.2rem, 15vw, 5rem);
    }

    .hero-graphic {
        width: 80%;

        margin: 0 auto;
    }

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

    .section {
        padding: 90px 0;
    }

    .footer-content {
        flex-direction: column;

        align-items: flex-start;
    }

}