:root {
    --ink: #0b1220;
    --ink-soft: #1c2637;
    --muted: #5d6a7b;
    --muted-strong: #39465a;
    --line: #dce3ec;
    --line-strong: #c5cfdd;
    --paper: #ffffff;
    --surface: #f6f8fb;
    --surface-strong: #edf2f7;
    --blue: #2557d6;
    --blue-dark: #173b99;
    --teal: #138a7a;
    --gold: #a56a12;
    --green: #13795b;
    --white: #ffffff;
    --radius: 8px;
    --shadow: 0 22px 70px rgba(12, 22, 38, 0.12);
    --shadow-soft: 0 12px 32px rgba(12, 22, 38, 0.08);
    --header-height: 76px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    background: var(--paper);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.6;
    letter-spacing: 0;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

body.nav-open {
    overflow: hidden;
}

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

button,
input,
select,
textarea {
    font: inherit;
}

button {
    border: 0;
}

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

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

h1,
h2,
h3 {
    color: var(--ink);
    line-height: 1.02;
    letter-spacing: 0;
}

h1 {
    max-width: 780px;
    font-size: 64px;
    font-weight: 760;
}

h2 {
    max-width: 760px;
    font-size: 44px;
    font-weight: 720;
}

h3 {
    font-size: 20px;
    font-weight: 700;
}

p {
    color: var(--muted);
}

ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

::selection {
    color: var(--white);
    background: var(--blue);
}

[id] {
    scroll-margin-top: 96px;
}

.section-shell,
.nav-shell {
    width: min(100% - 48px, 1180px);
    margin: 0 auto;
}

.section {
    padding: 104px 0;
}

.section-alt {
    background: var(--surface);
}

.section-heading {
    display: grid;
    gap: 16px;
    max-width: 820px;
    margin-bottom: 42px;
}

.section-heading.compact {
    margin-bottom: 32px;
}

.section-heading p:last-child {
    max-width: 720px;
    font-size: 18px;
}

.eyebrow {
    color: var(--blue);
    font-size: 13px;
    font-weight: 760;
    line-height: 1.2;
    text-transform: uppercase;
    letter-spacing: 0;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 18px;
    color: var(--ink);
    font-weight: 720;
    line-height: 1;
    border-radius: var(--radius);
    border: 1px solid transparent;
    transition: transform 180ms ease, background 180ms ease, border-color 180ms ease, color 180ms ease;
}

.button:hover {
    transform: translateY(-1px);
}

.button span[aria-hidden="true"] {
    margin-left: 6px;
}

.button:disabled {
    cursor: wait;
    opacity: 0.68;
    transform: none;
}

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

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

.button-secondary {
    color: var(--ink);
    background: var(--white);
    border-color: var(--line-strong);
}

.button-secondary:hover {
    border-color: var(--blue);
    color: var(--blue-dark);
}

.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 1000;
    min-height: var(--header-height);
    background: rgba(255, 255, 255, 0.88);
    border-bottom: 1px solid rgba(220, 227, 236, 0.78);
    backdrop-filter: blur(18px);
}

.site-header.is-scrolled {
    box-shadow: 0 10px 30px rgba(12, 22, 38, 0.06);
}

.nav-shell {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: var(--header-height);
    gap: 28px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex: 0 0 auto;
    font-weight: 780;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: var(--white);
    background: var(--ink);
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 820;
}

.brand-name {
    font-size: 17px;
    color: var(--ink);
}

.site-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 22px;
    color: var(--muted-strong);
    font-size: 14px;
    font-weight: 680;
}

.site-nav a {
    padding: 8px 0;
}

.site-nav a:hover {
    color: var(--blue);
}

.site-nav .nav-cta {
    padding: 10px 14px;
    color: var(--white);
    background: var(--ink);
    border-radius: var(--radius);
}

.site-nav .nav-cta:hover {
    color: var(--white);
    background: var(--blue);
}

.menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    padding: 0;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    margin: 4px auto;
    background: var(--ink);
    border-radius: 2px;
    transition: transform 180ms ease, opacity 180ms ease;
}

.menu-toggle.is-active span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.menu-toggle.is-active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.is-active span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

.hero {
    position: relative;
    overflow: hidden;
    padding: 148px 0 68px;
    background:
        linear-gradient(var(--surface) 1px, transparent 1px),
        linear-gradient(90deg, var(--surface) 1px, transparent 1px),
        #fbfcfe;
    background-size: 42px 42px;
}

.hero::after {
    position: absolute;
    inset: auto 0 0;
    height: 1px;
    content: "";
    background: var(--line);
}

.hero-grid {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(380px, 0.95fr);
    gap: 48px;
    align-items: center;
}

.hero-copy {
    display: grid;
    gap: 22px;
}

.hero-lede {
    max-width: 760px;
    color: var(--muted-strong);
    font-size: 19px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 6px;
}

.hero-signals {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding-top: 8px;
}

.hero-signals span {
    padding: 8px 10px;
    color: var(--muted-strong);
    background: rgba(255, 255, 255, 0.78);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 680;
}

.carrier-console {
    overflow: hidden;
    color: var(--white);
    background: var(--ink);
    border: 1px solid #243149;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.console-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    min-height: 54px;
    padding: 0 18px;
    color: #cbd5e1;
    background: #111a2b;
    border-bottom: 1px solid #243149;
    font-size: 13px;
    font-weight: 720;
}

.console-toolbar div {
    display: inline-flex;
    align-items: center;
    gap: 9px;
}

.status-dot {
    width: 9px;
    height: 9px;
    background: var(--teal);
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(19, 138, 122, 0.18);
}

.console-map {
    position: relative;
    min-height: 322px;
    padding: 24px;
    background:
        linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
        #0c1424;
    background-size: 28px 28px;
}

.console-map::before,
.console-map::after {
    position: absolute;
    inset: 50% 74px auto;
    height: 1px;
    content: "";
    background: linear-gradient(90deg, transparent, #47607e, transparent);
}

.console-map::after {
    inset: 56px auto 54px 50%;
    width: 1px;
    height: auto;
    background: linear-gradient(180deg, transparent, #47607e, transparent);
}

.campus-core {
    position: absolute;
    top: 50%;
    left: 50%;
    z-index: 2;
    display: grid;
    place-items: center;
    width: 156px;
    height: 156px;
    padding: 18px;
    text-align: center;
    background: #111c31;
    border: 1px solid #3c4f6d;
    border-radius: 50%;
    transform: translate(-50%, -50%);
}

.core-ring {
    position: absolute;
    inset: -13px;
    border: 1px solid rgba(19, 138, 122, 0.42);
    border-radius: 50%;
}

.campus-core strong {
    color: var(--white);
    font-size: 18px;
}

.campus-core small {
    color: #9fb0c4;
    font-size: 12px;
    line-height: 1.35;
}

.map-node {
    position: absolute;
    z-index: 3;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 38px;
    padding: 0 12px;
    color: #e8eef7;
    background: #172235;
    border: 1px solid #344762;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 720;
    box-shadow: 0 12px 26px rgba(0, 0, 0, 0.18);
}

.map-node span {
    width: 8px;
    height: 8px;
    background: var(--teal);
    border-radius: 50%;
}

.node-students {
    top: 46px;
    left: 34px;
}

.node-staff {
    top: 46px;
    right: 34px;
}

.node-alumni {
    bottom: 42px;
    left: 46px;
}

.node-fans {
    right: 46px;
    bottom: 42px;
}

.console-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-top: 1px solid #243149;
}

.console-grid div {
    min-height: 156px;
    padding: 20px;
    background: #10192a;
    border-right: 1px solid #243149;
}

.console-grid div:last-child {
    border-right: 0;
}

.console-label {
    display: block;
    margin-bottom: 12px;
    color: #93a5bd;
    font-size: 12px;
    font-weight: 780;
    text-transform: uppercase;
}

.console-grid strong {
    display: block;
    margin-bottom: 8px;
    color: var(--white);
    font-size: 17px;
    line-height: 1.25;
}

.console-grid p {
    color: #a8b7ca;
    font-size: 13px;
    line-height: 1.55;
}

.signal-band {
    padding: 28px 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
}

.signal-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.signal-grid div {
    display: flex;
    align-items: flex-start;
    gap: 14px;
}

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

.signal-grid p {
    color: var(--muted-strong);
    font-size: 14px;
    font-weight: 620;
    line-height: 1.45;
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.audience-card,
.plan-card,
.model-card,
.use-case,
.tech-stack article,
.contact-form {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow-soft);
}

.audience-card {
    display: grid;
    gap: 14px;
    min-height: 246px;
    padding: 22px;
}

.card-kicker {
    color: var(--teal);
    font-size: 12px;
    font-weight: 820;
    text-transform: uppercase;
}

.audience-card p,
.plan-card p,
.model-card p,
.use-case p,
.tech-stack p {
    line-height: 1.65;
}

.plans-layout {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.plan-card {
    position: relative;
    display: grid;
    align-content: start;
    gap: 18px;
    min-height: 264px;
    padding: 24px;
    overflow: hidden;
}

.plan-card::after {
    position: absolute;
    right: 0;
    bottom: 0;
    width: 88px;
    height: 88px;
    content: "";
    background: var(--surface-strong);
    border-top-left-radius: 100%;
}

.plan-index {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    color: var(--blue);
    background: #e9efff;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 820;
}

.model-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.model-card {
    display: grid;
    align-content: start;
    gap: 18px;
    padding: 24px;
}

.model-featured {
    border-color: rgba(19, 138, 122, 0.48);
    box-shadow: 0 18px 54px rgba(19, 138, 122, 0.16);
}

.model-topline {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.model-topline span {
    padding: 6px 8px;
    color: var(--muted-strong);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    font-size: 12px;
    font-weight: 760;
}

.model-card ul {
    display: grid;
    gap: 10px;
}

.model-card li {
    position: relative;
    padding-left: 20px;
    color: var(--muted-strong);
    font-size: 14px;
    line-height: 1.45;
}

.model-card li::before {
    position: absolute;
    top: 8px;
    left: 0;
    width: 7px;
    height: 7px;
    content: "";
    background: var(--teal);
    border-radius: 50%;
}

.control-meter {
    width: 100%;
    height: 8px;
    overflow: hidden;
    background: var(--surface-strong);
    border-radius: var(--radius);
}

.control-meter span {
    display: block;
    height: 100%;
    background: linear-gradient(90deg, var(--blue), var(--teal));
}

.model-note {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    margin-top: 18px;
    padding: 18px 20px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
}

.model-note strong {
    flex: 0 0 auto;
    font-size: 15px;
}

.model-note p {
    max-width: 740px;
    color: var(--muted-strong);
    font-size: 14px;
}

.impact-section {
    color: var(--white);
    background: var(--ink);
}

.impact-section h2,
.impact-section h3 {
    color: var(--white);
}

.impact-section .eyebrow {
    color: #65d2c5;
}

.impact-copy p:last-child {
    color: #b8c5d6;
    font-size: 18px;
    line-height: 1.7;
}

.impact-grid {
    display: grid;
    grid-template-columns: minmax(280px, 0.82fr) minmax(0, 1.18fr);
    gap: 54px;
    align-items: start;
}

.impact-copy {
    display: grid;
    gap: 18px;
    position: sticky;
    top: 114px;
}

.impact-list {
    display: grid;
    gap: 12px;
}

.impact-list article {
    display: grid;
    gap: 8px;
    padding: 20px;
    background: #121d30;
    border: 1px solid #263653;
    border-radius: var(--radius);
}

.impact-list p {
    color: #b8c5d6;
}

.use-case-list {
    display: grid;
    gap: 14px;
}

.use-case {
    display: grid;
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 18px;
    align-items: start;
    padding: 24px;
}

.use-case > span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    color: var(--white);
    background: var(--blue);
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 820;
}

.use-case div {
    display: grid;
    gap: 8px;
}

.tech-grid {
    display: grid;
    grid-template-columns: minmax(280px, 0.86fr) minmax(0, 1.14fr);
    gap: 44px;
    align-items: start;
}

.tech-copy {
    display: grid;
    gap: 18px;
}

.tech-copy p:last-child {
    color: var(--muted-strong);
    font-size: 18px;
    line-height: 1.7;
}

.tech-stack {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
}

.tech-stack article {
    display: grid;
    gap: 12px;
    min-height: 206px;
    padding: 22px;
}

.tech-stack span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: max-content;
    min-width: 44px;
    height: 34px;
    padding: 0 10px;
    color: var(--green);
    background: #e9f6f1;
    border-radius: var(--radius);
    font-size: 12px;
    font-weight: 820;
}

.contact-section {
    padding: 104px 0;
    background: #fdfefe;
    border-top: 1px solid var(--line);
}

.contact-grid {
    display: grid;
    grid-template-columns: minmax(280px, 0.82fr) minmax(0, 1.18fr);
    gap: 44px;
    align-items: start;
}

.contact-copy {
    display: grid;
    gap: 18px;
}

.contact-copy p:last-child {
    max-width: 520px;
    color: var(--muted-strong);
    font-size: 18px;
    line-height: 1.7;
}

.contact-form {
    display: grid;
    gap: 16px;
    padding: 24px;
}

.form-row {
    display: grid;
    gap: 8px;
}

.form-row label {
    color: var(--ink);
    font-size: 13px;
    font-weight: 760;
}

.form-row input,
.form-row select,
.form-row textarea {
    width: 100%;
    min-height: 46px;
    padding: 11px 12px;
    color: var(--ink);
    background: var(--paper);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    outline: none;
    transition: border-color 160ms ease, box-shadow 160ms ease;
}

.form-row textarea {
    min-height: 132px;
    resize: vertical;
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
    border-color: var(--blue);
    box-shadow: 0 0 0 4px rgba(37, 87, 214, 0.12);
}

.form-button {
    width: 100%;
    margin-top: 4px;
}

.form-status {
    min-height: 24px;
    color: var(--muted-strong);
    font-size: 14px;
}

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

.form-status.is-error {
    color: #b42318;
}

.site-footer {
    padding: 44px 0;
    color: #b8c5d6;
    background: #0a101d;
}

.footer-grid {
    display: grid;
    grid-template-columns: minmax(280px, 0.95fr) minmax(0, 1.05fr);
    gap: 32px;
    align-items: start;
}

.footer-brand {
    margin-bottom: 14px;
}

.footer-brand .brand-mark {
    background: var(--white);
    color: var(--ink);
}

.footer-brand .brand-name {
    color: var(--white);
}

.site-footer p {
    max-width: 520px;
    color: #9daec3;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 14px 22px;
    color: #cbd5e1;
    font-size: 14px;
    font-weight: 680;
}

.footer-links a:hover {
    color: var(--white);
}

@media (max-width: 1080px) {
    h1 {
        font-size: 54px;
    }

    h2 {
        font-size: 38px;
    }

    .hero-grid,
    .impact-grid,
    .tech-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .carrier-console {
        max-width: 680px;
    }

    .impact-copy {
        position: static;
    }

    .audience-grid,
    .plans-layout,
    .model-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 860px) {
    :root {
        --header-height: 70px;
    }

    .section-shell,
    .nav-shell {
        width: min(100% - 36px, 1180px);
    }

    .menu-toggle {
        display: block;
    }

    .site-nav {
        position: fixed;
        top: var(--header-height);
        right: 18px;
        left: 18px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 12px;
        background: var(--paper);
        border: 1px solid var(--line);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
    }

    .site-nav.is-open {
        display: flex;
    }

    .site-nav a {
        padding: 14px 12px;
        border-radius: var(--radius);
    }

    .site-nav a:hover {
        background: var(--surface);
    }

    .site-nav .nav-cta {
        margin-top: 6px;
        text-align: center;
    }

    .hero {
        padding-top: 118px;
    }

    .hero-grid {
        gap: 34px;
    }

    .signal-grid,
    .tech-stack,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-links {
        justify-content: flex-start;
    }
}

@media (max-width: 680px) {
    h1 {
        font-size: 40px;
    }

    h2 {
        font-size: 32px;
    }

    h3 {
        font-size: 19px;
    }

    .section {
        padding: 78px 0;
    }

    .hero-lede,
    .section-heading p:last-child,
    .impact-copy p:last-child,
    .tech-copy p:last-child,
    .contact-copy p:last-child {
        font-size: 16px;
    }

    .hero-actions,
    .button {
        width: 100%;
    }

    .audience-grid,
    .plans-layout,
    .model-grid {
        grid-template-columns: 1fr;
    }

    .model-note {
        display: grid;
        gap: 8px;
    }

    .console-toolbar {
        align-items: flex-start;
        flex-direction: column;
        min-height: auto;
        padding: 14px 16px;
        gap: 6px;
    }

    .console-map {
        min-height: 286px;
        padding: 16px;
    }

    .campus-core {
        width: 126px;
        height: 126px;
    }

    .node-students {
        top: 30px;
        left: 16px;
    }

    .node-staff {
        top: 30px;
        right: 16px;
    }

    .node-alumni {
        bottom: 28px;
        left: 16px;
    }

    .node-fans {
        right: 16px;
        bottom: 28px;
    }

    .map-node {
        max-width: 116px;
        min-height: 36px;
        padding: 0 9px;
        font-size: 12px;
    }

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

    .console-grid div {
        min-height: auto;
        border-right: 0;
        border-bottom: 1px solid #243149;
    }

    .console-grid div:last-child {
        border-bottom: 0;
    }

    .use-case {
        grid-template-columns: 1fr;
    }

    .contact-section {
        padding: 78px 0;
    }

    .contact-form {
        padding: 18px;
    }
}

@media (max-width: 430px) {
    .section-shell,
    .nav-shell {
        width: min(100% - 28px, 1180px);
    }

    h1 {
        font-size: 36px;
    }

    h2 {
        font-size: 29px;
    }

    .brand-name {
        font-size: 16px;
    }

    .hero-signals span {
        width: 100%;
    }

    .console-map::before,
    .console-map::after {
        opacity: 0.55;
    }

    .campus-core {
        width: 116px;
        height: 116px;
    }

    .campus-core strong {
        font-size: 16px;
    }
}