:root {
    --ink: #08111f;
    --ink-soft: #132338;
    --white: #ffffff;
    --paper: #f5f8fb;
    --paper-warm: #fbfaf6;
    --muted: #607086;
    --line: rgba(15, 35, 55, 0.14);
    --teal: #33d1bf;
    --teal-deep: #0d918b;
    --violet: #7b6ff6;
    --amber: #e1b85f;
    --shadow: 0 26px 70px rgba(11, 23, 39, 0.18);
    --radius: 8px;
    --container: 1160px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: Inter, Arial, sans-serif;
    color: var(--ink);
    background: var(--paper);
}

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

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

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

.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    padding: 24px clamp(20px, 5vw, 64px);
    color: var(--white);
    transition: background 180ms ease, box-shadow 180ms ease, padding 180ms ease;
}

.site-header.is-scrolled {
    padding-block: 14px;
    background: rgba(5, 13, 25, 0.88);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.22);
    backdrop-filter: blur(16px);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 16px;
    min-width: max-content;
}

.brand-mark {
    position: relative;
    width: 50px;
    height: 50px;
    flex: 0 0 50px;
}

.brand-mark::before,
.brand-mark::after {
    position: absolute;
    content: "";
    inset: 50% auto auto 50%;
    width: 44px;
    height: 8px;
    border-radius: 999px;
    background: linear-gradient(90deg, #d9fff7, var(--teal));
    transform: translate(-50%, -50%);
    box-shadow: 0 0 26px rgba(51, 209, 191, 0.58);
}

.brand-mark::after {
    width: 8px;
    height: 44px;
}

.brand-text {
    display: grid;
    gap: 4px;
}

.brand-text strong {
    font-size: clamp(1.1rem, 2vw, 1.45rem);
    letter-spacing: 0.38em;
    line-height: 1;
}

.brand-text small {
    font-size: 0.68rem;
    font-weight: 800;
    letter-spacing: 0.34em;
    text-transform: uppercase;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: clamp(18px, 3vw, 40px);
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.main-nav a {
    color: rgba(255, 255, 255, 0.84);
    transition: color 160ms ease;
}

.main-nav a:hover,
.main-nav a:focus {
    color: var(--teal);
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.06);
    color: var(--white);
}

.nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    margin: 5px auto;
    background: currentColor;
}

.hero {
    position: relative;
    min-height: 86vh;
    overflow: hidden;
    color: var(--white);
    background: #020914;
}

.hero-media,
.hero-overlay {
    position: absolute;
    inset: 0;
}

.hero-media {
    background-image: url("../img/hero-science.png");
    background-size: cover;
    background-position: center;
    transform: scale(1.02);
}

.hero-overlay {
    background:
        linear-gradient(90deg, rgba(2, 7, 15, 0.94) 0%, rgba(2, 7, 15, 0.68) 38%, rgba(2, 7, 15, 0.28) 70%, rgba(2, 7, 15, 0.62) 100%),
        linear-gradient(180deg, rgba(2, 7, 15, 0.72) 0%, rgba(2, 7, 15, 0.02) 46%, rgba(2, 7, 15, 0.84) 100%);
}

.hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 330px;
    align-items: center;
    gap: 60px;
    min-height: 86vh;
    padding-top: 130px;
    padding-bottom: 78px;
}

.hero-copy {
    max-width: 720px;
}

.eyebrow {
    margin: 0 0 18px;
    font-size: clamp(1.4rem, 3vw, 2.35rem);
    line-height: 1;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

.hero h1 {
    margin-bottom: 16px;
    font-size: clamp(3.8rem, 7vw, 6.7rem);
    font-weight: 900;
    line-height: 0.95;
    text-transform: uppercase;
}

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

.tagline {
    position: relative;
    margin-bottom: 24px;
    padding-left: 76px;
    font-size: clamp(1.15rem, 2vw, 1.7rem);
}

.tagline::before {
    position: absolute;
    content: "";
    top: 50%;
    left: 0;
    width: 48px;
    height: 3px;
    background: var(--teal);
}

.hero-text {
    max-width: 540px;
    color: rgba(255, 255, 255, 0.82);
    font-size: 1.06rem;
    line-height: 1.75;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 30px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 0 26px;
    border: 1px solid transparent;
    border-radius: var(--radius);
    font-size: 0.86rem;
    font-weight: 800;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    cursor: pointer;
    transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.btn:hover,
.btn:focus {
    transform: translateY(-2px);
}

.btn-primary {
    color: #03131f;
    background: linear-gradient(135deg, var(--teal), #86f3df);
    box-shadow: 0 16px 34px rgba(51, 209, 191, 0.25);
}

.btn-ghost {
    color: var(--white);
    border-color: rgba(51, 209, 191, 0.72);
    background: rgba(4, 15, 28, 0.42);
}

.launch-card {
    position: relative;
    isolation: isolate;
    display: grid;
    justify-self: end;
    width: min(100%, 330px);
    min-height: 360px;
    align-content: end;
    overflow: hidden;
    padding: 30px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: var(--radius);
    background:
        linear-gradient(160deg, rgba(51, 209, 191, 0.18), rgba(123, 111, 246, 0.12)),
        rgba(3, 12, 24, 0.72);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.38);
    backdrop-filter: blur(18px);
}

.launch-card::before {
    position: absolute;
    content: "";
    inset: 18px;
    z-index: -1;
    border: 1px solid rgba(51, 209, 191, 0.22);
    border-radius: var(--radius);
}

.launch-orbit {
    position: absolute;
    top: 46px;
    left: 50%;
    width: 170px;
    height: 170px;
    border: 1px solid rgba(134, 243, 223, 0.32);
    border-radius: 50%;
    transform: translateX(-50%);
}

.launch-orbit::before,
.launch-orbit::after {
    position: absolute;
    content: "";
    inset: 34px;
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 50%;
}

.launch-orbit::after {
    inset: 70px;
    background: var(--teal);
    box-shadow: 0 0 34px rgba(51, 209, 191, 0.82);
}

.launch-card p,
.launch-card h2,
.launch-card span {
    position: relative;
    margin: 0;
}

.launch-card p {
    margin-bottom: 10px;
    color: var(--teal);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.launch-card h2 {
    margin-bottom: 12px;
    font-size: clamp(2rem, 3vw, 2.7rem);
    line-height: 1;
}

.launch-card span {
    color: rgba(255, 255, 255, 0.76);
    line-height: 1.6;
}

.issue-visual {
    justify-self: end;
    width: min(100%, 300px);
}

.issue-visual img {
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--radius);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.48);
}

.issue-badge {
    display: grid;
    gap: 4px;
    margin-top: 14px;
    padding: 16px;
    border-left: 3px solid var(--teal);
    background: rgba(3, 12, 24, 0.66);
    backdrop-filter: blur(14px);
}

.issue-badge span {
    color: var(--teal);
    font-size: 0.8rem;
    font-weight: 800;
    text-transform: uppercase;
}

.issue-badge strong {
    font-size: 1rem;
}

.issue-panel {
    position: relative;
    z-index: 2;
    margin-top: -44px;
}

.issue-layout {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    overflow: hidden;
    border-radius: var(--radius);
    background: var(--white);
    box-shadow: var(--shadow);
}

.issue-layout > div {
    padding: clamp(26px, 4vw, 42px);
    border-right: 1px solid var(--line);
}

.issue-layout > div:last-child {
    border-right: 0;
}

.section-kicker {
    margin-bottom: 12px;
    color: var(--teal-deep);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.issue-layout h2,
.section-heading h2,
.split-copy h2,
.contact-grid h2 {
    margin-bottom: 16px;
    font-size: clamp(2rem, 4vw, 3.25rem);
    line-height: 1.05;
}

.issue-layout p,
.section-heading p,
.split-copy p,
.contact-grid p {
    color: var(--muted);
    line-height: 1.75;
}

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: 12px;
    color: var(--teal-deep);
    font-size: 0.85rem;
    font-weight: 900;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.text-link::after {
    content: "->";
    color: currentColor;
}

.feature-band {
    padding: 58px 0 66px;
    background: var(--paper);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 34px;
}

.feature-item {
    display: grid;
    grid-template-columns: 54px 1fr;
    gap: 18px;
    align-items: start;
}

.feature-icon {
    position: relative;
    width: 54px;
    height: 54px;
    border: 2px solid rgba(8, 76, 89, 0.28);
    border-radius: 50%;
}

.feature-icon::before,
.feature-icon::after {
    position: absolute;
    content: "";
}

.icon-unlock::before {
    inset: 18px 13px 11px;
    border: 3px solid #13495c;
    border-radius: 999px;
}

.icon-unlock::after {
    left: 18px;
    top: 8px;
    width: 22px;
    height: 24px;
    border: 3px solid #13495c;
    border-bottom: 0;
    border-radius: 18px 18px 0 0;
    transform: translateX(-5px);
}

.icon-users::before {
    inset: 14px 11px auto;
    height: 16px;
    border: 3px solid #13495c;
    border-radius: 999px 999px 0 0;
}

.icon-users::after {
    left: 11px;
    right: 11px;
    bottom: 10px;
    height: 18px;
    border: 3px solid #13495c;
    border-top: 0;
    border-radius: 0 0 10px 10px;
}

.icon-globe::before {
    inset: 9px;
    border: 3px solid #13495c;
    border-radius: 50%;
}

.icon-globe::after {
    inset: 25px 9px auto;
    height: 3px;
    background: #13495c;
    box-shadow: 0 -11px 0 rgba(19, 73, 92, 0.55), 0 11px 0 rgba(19, 73, 92, 0.55);
}

.icon-shield::before {
    left: 14px;
    top: 9px;
    width: 26px;
    height: 34px;
    border: 3px solid #13495c;
    border-radius: 12px 12px 16px 16px;
}

.icon-shield::after {
    left: 22px;
    top: 24px;
    width: 10px;
    height: 6px;
    border-left: 3px solid #13495c;
    border-bottom: 3px solid #13495c;
    transform: rotate(-45deg);
}

.feature-item h3 {
    margin-bottom: 8px;
    font-size: 1rem;
    text-transform: uppercase;
}

.feature-item p {
    margin: 0;
    color: var(--muted);
    line-height: 1.6;
}

.content-section,
.split-section,
.contact-section {
    padding: clamp(72px, 10vw, 118px) 0;
}

.section-heading {
    max-width: 780px;
    margin-bottom: 34px;
}

.article-grid,
.board-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.article-card,
.board-member,
.contact-form {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--white);
    box-shadow: 0 14px 40px rgba(13, 29, 48, 0.08);
}

.article-card {
    display: flex;
    min-height: 260px;
    flex-direction: column;
    padding: 30px;
}

.article-card span,
.board-member span {
    color: var(--teal-deep);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.09em;
    text-transform: uppercase;
}

.article-card h3 {
    margin: 18px 0;
    font-size: clamp(1.2rem, 2vw, 1.55rem);
    line-height: 1.25;
}

.article-card p {
    color: var(--muted);
    line-height: 1.6;
}

.article-card .text-link {
    margin-top: auto;
}

.split-section {
    color: var(--white);
    background:
        linear-gradient(135deg, rgba(4, 13, 25, 0.96), rgba(8, 22, 40, 0.94)),
        url("../img/hero-science.png") center / cover;
}

.split-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 410px;
    gap: clamp(42px, 8vw, 90px);
    align-items: center;
}

.split-copy p {
    color: rgba(255, 255, 255, 0.78);
}

.check-list {
    display: grid;
    gap: 14px;
    margin: 26px 0 0;
    padding: 0;
    list-style: none;
}

.check-list li {
    position: relative;
    padding-left: 30px;
    color: rgba(255, 255, 255, 0.86);
    line-height: 1.6;
}

.check-list li::before {
    position: absolute;
    content: "";
    top: 9px;
    left: 0;
    width: 14px;
    height: 8px;
    border-left: 2px solid var(--teal);
    border-bottom: 2px solid var(--teal);
    transform: rotate(-45deg);
}

.author-steps {
    display: grid;
    gap: 12px;
}

.author-steps div {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 22px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(12px);
}

.author-steps strong {
    color: var(--teal);
    font-size: 1.35rem;
}

.author-steps span {
    font-weight: 800;
}

.editorial-section {
    background: var(--paper-warm);
}

.board-member {
    padding: 30px;
}

.avatar {
    display: grid;
    width: 58px;
    height: 58px;
    margin-bottom: 26px;
    place-items: center;
    border-radius: 50%;
    color: #051625;
    background: linear-gradient(135deg, var(--teal), #f0d179);
    font-weight: 900;
}

.board-member h3 {
    margin-bottom: 8px;
}

.board-member p {
    margin-bottom: 14px;
    color: var(--muted);
}

.contact-section {
    color: var(--white);
    background: #06111f;
}

.contact-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(320px, 0.92fr);
    gap: clamp(36px, 7vw, 86px);
    align-items: start;
}

.contact-grid p {
    color: rgba(255, 255, 255, 0.76);
}

.contact-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}

.contact-meta span {
    padding: 10px 14px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: var(--radius);
    color: rgba(255, 255, 255, 0.86);
    background: rgba(255, 255, 255, 0.05);
}

.contact-form {
    display: grid;
    gap: 18px;
    padding: clamp(24px, 4vw, 36px);
    color: var(--ink);
}

.contact-form label {
    display: grid;
    gap: 8px;
    color: var(--ink-soft);
    font-size: 0.86rem;
    font-weight: 800;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    border: 1px solid rgba(8, 17, 31, 0.18);
    border-radius: var(--radius);
    padding: 14px 15px;
    color: var(--ink);
    background: #f9fbfd;
    font: inherit;
}

.contact-form textarea {
    resize: vertical;
}

.form-status {
    border: 1px solid rgba(13, 145, 139, 0.25);
    border-radius: var(--radius);
    padding: 14px 16px;
    color: #07534f;
    background: rgba(51, 209, 191, 0.13);
    font-weight: 800;
}

.site-footer {
    padding: 34px 0;
    color: rgba(255, 255, 255, 0.72);
    background: #030914;
}

.footer-layout {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
}

.footer-layout p {
    margin: 0;
    text-align: right;
}

@media (max-width: 1040px) {
    .hero-grid,
    .split-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .issue-visual {
        display: none;
    }

    .feature-grid,
    .article-grid,
    .board-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 820px) {
    .site-header {
        padding: 16px 20px;
    }

    .brand-text strong {
        font-size: 1rem;
        letter-spacing: 0.25em;
    }

    .brand-text small {
        font-size: 0.56rem;
        letter-spacing: 0.22em;
    }

    .nav-toggle {
        display: block;
    }

    .main-nav {
        position: absolute;
        top: calc(100% + 10px);
        right: 20px;
        display: grid;
        width: min(320px, calc(100vw - 40px));
        gap: 0;
        padding: 10px;
        border: 1px solid rgba(255, 255, 255, 0.14);
        border-radius: var(--radius);
        background: rgba(5, 13, 25, 0.96);
        box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
        opacity: 0;
        pointer-events: none;
        transform: translateY(-8px);
        transition: opacity 160ms ease, transform 160ms ease;
    }

    .main-nav.is-open {
        opacity: 1;
        pointer-events: auto;
        transform: translateY(0);
    }

    .main-nav a {
        padding: 14px;
    }

    .hero,
    .hero-grid {
        min-height: auto;
    }

    .hero-grid {
        padding-top: 112px;
        padding-bottom: 58px;
    }

    .hero h1 {
        font-size: clamp(2.25rem, 9.4vw, 3.8rem);
    }

    .issue-layout,
    .feature-grid,
    .article-grid,
    .board-grid {
        grid-template-columns: 1fr;
    }

    .issue-layout > div {
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

    .issue-layout > div:last-child {
        border-bottom: 0;
    }

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

    .footer-layout p {
        text-align: left;
    }
}

@media (max-width: 560px) {
    .container {
        width: min(100% - 28px, var(--container));
    }

    .brand {
        gap: 10px;
    }

    .brand-mark {
        width: 38px;
        height: 38px;
        flex-basis: 38px;
    }

    .brand-mark::before {
        width: 34px;
    }

    .brand-mark::after {
        height: 34px;
    }

    .tagline {
        padding-left: 52px;
    }

    .tagline::before {
        width: 36px;
    }

    .hero-actions,
    .contact-meta {
        flex-direction: column;
    }

    .launch-card {
        width: 100%;
        min-height: 230px;
        padding: 22px;
    }

    .launch-orbit {
        top: 24px;
        width: 118px;
        height: 118px;
    }

    .launch-orbit::before {
        inset: 24px;
    }

    .launch-orbit::after {
        inset: 48px;
    }

    .btn {
        width: 100%;
    }

    .feature-item {
        grid-template-columns: 48px 1fr;
    }
}