:root {
    --navy: #0b1f3a;
    --blue: #174ea6;
    --light-blue: #eef5ff;
    --text: #1d2939;
    --muted: #667085;
    --border: #e4e7ec;
    --white: #ffffff;
    --soft: #f8fafc;
    --green: #067647;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family:
        Inter,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    color: var(--text);
    background: var(--white);
    line-height: 1.6;
}

.container {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
}

.narrow {
    max-width: 850px;
}

.topbar {
    border-bottom: 1px solid var(--border);
    background: rgba(255,255,255,.96);
}

.nav {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 11px;
    color: var(--navy);
    text-decoration: none;
    font-size: 20px;
    font-weight: 800;
}

.brand-mark {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    color: white;
    background: var(--blue);
}

nav {
    display: flex;
    gap: 28px;
}

nav a {
    color: #475467;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
}

.hero {
    padding: 100px 0 85px;
    background:
        linear-gradient(
            180deg,
            #f7faff 0%,
            #ffffff 100%
        );
}

.hero-inner {
    max-width: 900px;
}

.eyebrow {
    color: var(--blue);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 1.7px;
    margin-bottom: 16px;
}

h1 {
    margin: 0;
    max-width: 850px;
    color: var(--navy);
    font-size: clamp(46px, 7vw, 82px);
    letter-spacing: -3px;
    line-height: 1.02;
}

.hero-text {
    max-width: 730px;
    margin: 28px 0 0;
    font-size: 20px;
    color: var(--muted);
}

.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 34px;
}

.primary-button,
.secondary-button {
    min-height: 48px;
    padding: 12px 21px;
    border-radius: 9px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-weight: 700;
}

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

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

.research-notice {
    max-width: 790px;
    margin-top: 42px;
    padding: 16px 18px;
    border-left: 4px solid var(--blue);
    background: var(--light-blue);
    color: #475467;
    font-size: 14px;
}

.section {
    padding: 90px 0;
}

.soft-section {
    background: var(--soft);
}

.section-heading {
    max-width: 750px;
    margin-bottom: 42px;
}

.section-heading h2,
#about h2 {
    margin: 0 0 15px;
    color: var(--navy);
    font-size: 38px;
    letter-spacing: -1.3px;
}

.section-heading p {
    margin: 0;
    color: var(--muted);
    font-size: 17px;
}

.research-grid {
    display: grid;
    grid-template-columns:
        minmax(0, 1.5fr)
        minmax(280px, .8fr);
    gap: 24px;
}

.research-card {
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 30px;
}

.muted-card {
    background: var(--soft);
}

.card-top {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    flex-wrap: wrap;
}

.research-type,
.status {
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 1px;
}

.research-type {
    color: var(--blue);
}

.status {
    color: var(--green);
}

.research-card h3 {
    margin: 23px 0 13px;
    color: var(--navy);
    font-size: 30px;
    line-height: 1.18;
}

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

.card-meta {
    display: grid;
    grid-template-columns:
        repeat(3, 1fr);
    gap: 12px;
    margin: 27px 0;
}

.card-meta div {
    border-top: 1px solid var(--border);
    padding-top: 13px;
}

.card-meta span {
    display: block;
    font-size: 12px;
    color: var(--muted);
}

.card-meta strong {
    display: block;
    margin-top: 3px;
    color: var(--navy);
}

.research-link {
    color: var(--blue);
    text-decoration: none;
    font-weight: 800;
}

.coming-soon {
    margin-top: 28px;
    color: var(--muted);
    font-weight: 700;
}

.principles {
    display: grid;
    grid-template-columns:
        repeat(3, 1fr);
    gap: 28px;
}

.principle {
    padding-right: 25px;
}

.number {
    color: var(--blue);
    font-weight: 800;
    font-size: 13px;
}

.principle h3 {
    color: var(--navy);
    margin: 12px 0 8px;
}

.principle p {
    margin: 0;
    color: var(--muted);
}

.about-text {
    font-size: 19px;
    color: var(--muted);
}

footer {
    border-top: 1px solid var(--border);
    padding: 34px 0;
    color: var(--muted);
    font-size: 13px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 25px;
}

footer strong {
    color: var(--navy);
}

.footer-note {
    text-align: right;
}

@media (max-width: 760px) {

    nav {
        display: none;
    }

    .hero {
        padding: 70px 0 60px;
    }

    h1 {
        letter-spacing: -2px;
    }

    .research-grid,
    .principles {
        grid-template-columns: 1fr;
    }

    .card-meta {
        grid-template-columns: 1fr;
    }

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

    .footer-note {
        text-align: left;
    }
}