/* =========================================================
   GLOBAL HEALTH EXPLORERS
   POPULATION & DEMOGRAPHY
   ========================================================= */


/* =========================================================
   ROOT VARIABLES
   ========================================================= */

:root {

    --navy: #092746;
    --teal: #147d80;
    --gold: #d99b18;

    --ink: #172433;
    --muted: #5d6b78;

    --line: #d9e3ea;

    --soft: #f4f8fa;
    --sky: #eaf5fb;
    --green-soft: #eef8f3;

    --white: #ffffff;

    --shadow:
        0 16px 44px rgba(9, 39, 70, 0.10);

    --radius: 22px;

}


/* =========================================================
   RESET / BASE
   ========================================================= */

* {
    box-sizing: border-box;
}


html {
    scroll-behavior: smooth;
}


body {
    margin: 0;

    font-family:
        Inter,
        ui-sans-serif,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;

    color: var(--ink);

    background: #ffffff;

    line-height: 1.65;
}


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


a {
    color: inherit;
}


button,
input {
    font: inherit;
}


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

.site-header {

    position: sticky;

    top: 0;

    z-index: 1000;

    background:
        rgba(9, 39, 70, 0.98);

    box-shadow:
        0 5px 22px rgba(0, 0, 0, 0.15);

}


.main-nav {

    max-width: 1400px;

    min-height: 76px;

    margin: 0 auto;

    padding:
        10px 28px;

    display: flex;

    align-items: center;

    gap: 22px;

}


.brand {

    display: flex;

    align-items: center;

    gap: 11px;

    color: #ffffff;

    text-decoration: none;

    font-weight: 800;

    white-space: nowrap;

}


.brand img {

    width: 49px;

    height: 49px;

    border-radius: 50%;

    object-fit: contain;

}


.nav-links {

    margin-left: auto;

    display: flex;

    align-items: center;

    gap: 4px;

}


.nav-links a {

    color: #ffffff;

    text-decoration: none;

    font-size: 0.86rem;

    font-weight: 700;

    padding:
        10px 9px;

    border-radius: 9px;

    transition:
        background 0.2s ease;

}


.nav-links a:hover,
.nav-links a.active {

    background:
        rgba(255, 255, 255, 0.13);

}


.nav-toggle {

    display: none;

    margin-left: auto;

    border: 0;

    background: transparent;

    color: #ffffff;

    font-size: 1.7rem;

    cursor: pointer;

}


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

.hero {

    max-width: 1400px;

    min-height: 600px;

    margin: 0 auto;

    display: grid;

    grid-template-columns:
        1.12fr 0.88fr;

    background:
        linear-gradient(
            135deg,
            #edf8fc,
            #ffffff
        );

}


.hero-media {

    min-height: 600px;

    overflow: hidden;

}


.hero-media img {

    width: 100%;

    height: 100%;

    object-fit: cover;

}


.hero-copy {

    padding:
        76px 7vw 70px 6vw;

    display: flex;

    flex-direction: column;

    justify-content: center;

}


.eyebrow,
.kicker {

    margin:
        0 0 13px;

    color: var(--teal);

    font-size: 0.77rem;

    line-height: 1.4;

    letter-spacing: 0.16em;

    font-weight: 900;

}


.hero h1 {

    margin:
        0 0 23px;

    color: var(--navy);

    font-size:
        clamp(
            2.45rem,
            5vw,
            4.65rem
        );

    line-height: 1.04;

    letter-spacing: -0.045em;

}


.hero-lead {

    margin:
        0 0 13px;

    color: #294154;

    font-size: 1.19rem;

    line-height: 1.55;

    font-weight: 650;

}


.hero-copy p:not(.eyebrow):not(.hero-lead) {

    max-width: 650px;

}


.hero-cta {

    align-self: flex-start;

    display: inline-flex;

    margin-top: 20px;

    padding:
        13px 21px;

    border-radius: 999px;

    background: var(--navy);

    color: #ffffff;

    text-decoration: none;

    font-weight: 800;

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

}


.hero-cta:hover {

    background: var(--teal);

    transform: translateY(-2px);

}


/* =========================================================
   PATHWAY
   ========================================================= */

.pathway {

    max-width: 1180px;

    margin: 0 auto;

    padding:
        20px 22px;

    display: flex;

    justify-content: center;

    align-items: center;

    gap: 15px;

    flex-wrap: wrap;

    color: var(--navy);

    font-size: 0.92rem;

    font-weight: 800;

}


.pathway b {

    color: var(--gold);

}


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

.section {

    max-width: 1180px;

    margin: 0 auto;

    padding:
        88px 28px;

}


.section h2 {

    margin:
        0 0 18px;

    color: var(--navy);

    font-size:
        clamp(
            2rem,
            3.7vw,
            3rem
        );

    line-height: 1.12;

    letter-spacing: -0.025em;

}


.section-heading {

    max-width: 850px;

    margin-bottom: 36px;

}


.section-heading > p:not(.kicker) {

    font-size: 1.07rem;

}


/* =========================================================
   INTRODUCTION
   ========================================================= */

.intro {

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

}


.intro-text {

    max-width: 900px;

    font-size: 1.08rem;

}


.concept-grid {

    margin-top: 39px;

    display: grid;

    grid-template-columns:
        repeat(4, 1fr);

    gap: 18px;

}


.concept-grid article,
.det-grid article {

    padding: 25px;

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

    border-radius:
        var(--radius);

    background: #ffffff;

    box-shadow:
        0 8px 28px rgba(
            9,
            39,
            70,
            0.05
        );

}


.concept-grid span,
.det-number {

    color: var(--teal);

    font-size: 0.8rem;

    font-weight: 900;

}


.concept-grid h3,
.det-grid h3 {

    margin:
        7px 0;

    color: var(--navy);

}


.concept-grid p,
.det-grid p {

    margin: 0;

    color: var(--muted);

}


/* =========================================================
   EXPLORE THE WORLD
   ========================================================= */

.visual-section {

    max-width: none;

    padding-left:
        max(
            28px,
            calc(
                (100% - 1180px) / 2 + 28px
            )
        );

    padding-right:
        max(
            28px,
            calc(
                (100% - 1180px) / 2 + 28px
            )
        );

    background: var(--soft);

}


.visual-card {

    max-width: 1124px;

    display: grid;

    grid-template-columns:
        1.48fr 0.72fr;

    overflow: hidden;

    border-radius:
        var(--radius);

    background: #ffffff;

    box-shadow:
        var(--shadow);

}


.visual-image-wrap {

    min-height: 390px;

}


.visual-image-wrap img {

    width: 100%;

    height: 100%;

    min-height: 390px;

    object-fit: cover;

}


.look-box {

    padding: 35px;

    display: flex;

    flex-direction: column;

    justify-content: center;

}


.activity-label {

    color: var(--teal);

    font-size: 0.72rem;

    letter-spacing: 0.14em;

    font-weight: 900;

}


.look-box h3 {

    margin:
        7px 0 15px;

    color: var(--navy);

    font-size: 1.55rem;

}


.look-box p {

    margin:
        7px 0;

    color: var(--muted);

}


.look-box p strong {

    color: var(--ink);

}


/* =========================================================
   DATA SECTION
   ========================================================= */

.data-section {

    padding-top: 98px;

}


.data-figure {

    margin:
        38px 0 30px;

    padding: 19px;

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

    border-radius:
        var(--radius);

    background: #ffffff;

    box-shadow:
        var(--shadow);

}


.data-image-wrap {

    min-height: 520px;

    display: flex;

    align-items: center;

    justify-content: center;

    overflow: auto;

}


.data-image-wrap img {

    width: 100%;

    max-height: 820px;

    object-fit: contain;

}


.data-figure figcaption {

    padding:
        14px 5px 0;

    color: var(--muted);

    font-size: 0.82rem;

}


/* =========================================================
   DATA QUESTIONS
   ========================================================= */

.question-panel {

    padding:
        34px 38px;

    border-radius:
        var(--radius);

    background: var(--sky);

}


.panel-title {

    display: flex;

    align-items: center;

    gap: 14px;

}


.panel-title span {

    width: 36px;

    height: 36px;

    display: grid;

    place-items: center;

    flex: none;

    border-radius: 50%;

    background: var(--teal);

    color: #ffffff;

    font-size: 0.82rem;

    font-weight: 900;

}


.question-panel h3 {

    margin: 0;

    color: var(--navy);

    font-size: 1.55rem;

}


.question-panel ol {

    margin:
        21px 0 0;

    padding-left: 24px;

}


.question-panel li {

    margin:
        9px 0;

}


.think-deeper {

    margin-top: 27px;

    padding:
        21px 23px;

    border-left:
        5px solid var(--gold);

    border-radius: 11px;

    background: #ffffff;

}


.think-deeper span {

    color: #8a6510;

    font-size: 0.73rem;

    letter-spacing: 0.14em;

    font-weight: 900;

}


.think-deeper p {

    margin:
        5px 0 0;

    color: var(--navy);

    font-weight: 750;

}


/* =========================================================
   LIFE-COURSE EPIDEMIOLOGY
   ========================================================= */

.life-course {

    max-width: none;

    background: var(--navy);

    color: #ffffff;

    text-align: center;

}


.life-course-inner {

    max-width: 1180px;

    margin: 0 auto;

}


.life-course .kicker {

    color: #8ed6d2;

}


.life-course h2 {

    color: #ffffff;

}


.life-course .lead {

    max-width: 850px;

    margin:
        0 auto;

    font-size: 1.18rem;

}


.chain {

    max-width: 1120px;

    margin:
        40px auto 0;

    display: flex;

    align-items: center;

    justify-content: center;

    gap: 10px;

    flex-wrap: wrap;

}


.chain span {

    padding:
        11px 15px;

    border:
        1px solid rgba(
            255,
            255,
            255,
            0.28
        );

    border-radius: 999px;

    background:
        rgba(
            255,
            255,
            255,
            0.08
        );

    font-weight: 750;

}


.chain b {

    color: #8ed6d2;

}


/* =========================================================
   GHE DATA LENS
   ========================================================= */

.det-grid {

    display: grid;

    grid-template-columns:
        repeat(3, 1fr);

    gap: 18px;

}


.det-grid .wide {

    grid-column:
        1 / -1;

    background:
        var(--green-soft);

    border-color:
        #cfe8dc;

}


/* =========================================================
   DETERMINANTS CONNECTION
   ========================================================= */

.connect-section {

    max-width: none;

    background: #f8fafc;

}


.connect-card {

    max-width: 1000px;

    margin: 0 auto;

    padding: 39px;

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

    border-radius:
        var(--radius);

    background: #ffffff;

    box-shadow:
        var(--shadow);

}


.connect-card h2 {

    font-size: 2.25rem;

}


.connect-card p {

    max-width: 900px;

}


/* =========================================================
   SDH / SDGs
   ========================================================= */

.sdg-grid {

    display: grid;

    grid-template-columns:
        repeat(3, 1fr);

    gap: 18px;

}


.sdg-grid > div {

    padding: 26px;

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

    border-radius:
        var(--radius);

    background: var(--soft);

}


.sdg-grid strong {

    display: block;

    margin-bottom: 8px;

    color: var(--teal);

    font-size: 1.08rem;

}


.sdg-grid span {

    color: var(--muted);

}


/* =========================================================
   QUIZ
   ========================================================= */

.mcq-section {

    max-width: none;

    background:
        #eef4f8;

}


.mcq-section .section-heading,
.quiz-grid {

    max-width: 1180px;

    margin-left: auto;

    margin-right: auto;

}


.quiz-grid {

    display: grid;

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

    gap: 18px;

}


.mcq {

    padding: 23px;

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

    border-radius: 18px;

    background: #ffffff;

    transition:
        border-color 0.2s ease,
        box-shadow 0.2s ease;

}


.mcq h3 {

    margin:
        0 0 14px;

    color: var(--navy);

    font-size: 1.02rem;

    line-height: 1.45;

}


.mcq label {

    display: block;

    padding:
        8px 7px;

    border-radius: 8px;

    color: #46535f;

    cursor: pointer;

}


.mcq label:hover {

    background:
        #f2f6f8;

}


.mcq input {

    margin-right: 8px;

}


.mcq.correct-card {

    border-color:
        #56a675;

    background:
        #f0fbf4;

    box-shadow:
        0 8px 24px rgba(
            45,
            125,
            79,
            0.08
        );

}


.mcq.incorrect-card {

    border-color:
        #d89a9a;

    background:
        #fffafa;

}


.check-btn {

    display: block;

    margin:
        36px auto 0;

    padding:
        14px 26px;

    border: 0;

    border-radius: 999px;

    background:
        var(--navy);

    color: #ffffff;

    font-weight: 850;

    cursor: pointer;

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

}


.check-btn:hover {

    background:
        var(--teal);

    transform:
        translateY(-2px);

}


.quiz-result {

    min-height: 1.8em;

    margin:
        18px 0 0;

    color: var(--navy);

    text-align: center;

    font-weight: 800;

}


/* =========================================================
   REFLECT / ACT
   ========================================================= */

.action-section {

    display: grid;

    grid-template-columns:
        1.1fr 0.9fr;

    gap: 45px;

    align-items: center;

}


.action-chain {

    display: flex;

    align-items: center;

    justify-content: center;

    flex-wrap: wrap;

    gap: 9px;

}


.action-chain span {

    color: var(--teal);

    font-weight: 850;

}


.action-chain b {

    color: var(--gold);

}


/* =========================================================
   NEXT SECTION
   ========================================================= */

.next-section {

    text-align: center;

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

}


.next-section h2 {

    max-width: 850px;

    margin-left: auto;

    margin-right: auto;

}


.next-section > p:not(.kicker) {

    max-width: 720px;

    margin-left: auto;

    margin-right: auto;

}


.next-links {

    margin-top: 24px;

    display: flex;

    justify-content: center;

    flex-wrap: wrap;

    gap: 14px;

}


.next-links a {

    display: inline-flex;

    padding:
        13px 20px;

    border-radius: 999px;

    background:
        var(--navy);

    color: #ffffff;

    text-decoration: none;

    font-weight: 800;

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

}


.next-links a:hover {

    transform:
        translateY(-2px);

}


.next-links a:last-child {

    background:
        var(--teal);

}


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

.site-footer {

    background:
        #071a31;

    color:
        #d9e5ee;

}


.footer-inner {

    max-width: 1180px;

    margin: 0 auto;

    padding:
        58px 28px 42px;

    display: grid;

    grid-template-columns:
        2fr 1fr 1fr;

    gap: 50px;

}


.footer-brand {

    display: flex;

    align-items: flex-start;

    gap: 14px;

}


.footer-brand img {

    width: 56px;

    height: 56px;

    flex: none;

    border-radius: 50%;

    object-fit: contain;

}


.footer-inner h2 {

    margin:
        0 0 4px;

    color: #ffffff;

    font-size: 1.25rem;

}


.footer-inner h3 {

    margin:
        0 0 12px;

    color: #ffffff;

}


.footer-inner p {

    margin: 0;

}


.footer-inner a {

    display: block;

    margin:
        7px 0;

    color:
        #d9e5ee;

    text-decoration: none;

}


.footer-inner a:hover {

    color: #ffffff;

}


.footer-bottom {

    max-width: 1180px;

    margin: 0 auto;

    padding:
        18px 28px;

    border-top:
        1px solid rgba(
            255,
            255,
            255,
            0.12
        );

    display: flex;

    justify-content: space-between;

    gap: 15px;

    color:
        #9fb1c1;

    font-size: 0.82rem;

}


/* =========================================================
   TABLET
   ========================================================= */

@media (max-width: 1100px) {

    .nav-links a {

        font-size: 0.78rem;

        padding:
            9px 6px;

    }


    .hero {

        grid-template-columns:
            1fr;

    }


    .hero-media {

        min-height: 470px;

        max-height: 470px;

    }


    .hero-media img {

        min-height: 470px;

    }


    .hero-copy {

        padding:
            58px 7vw;

    }


    .concept-grid {

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

    }

}


/* =========================================================
   MOBILE NAVIGATION / TABLET
   ========================================================= */

@media (max-width: 780px) {

    .main-nav {

        padding:
            10px 17px;

    }


    .brand span {

        font-size: 0.9rem;

    }


    .nav-toggle {

        display: block;

    }


    .nav-links {

        display: none;

        position: absolute;

        top: 69px;

        left: 0;

        right: 0;

        padding:
            10px 17px 18px;

        flex-direction: column;

        align-items: stretch;

        background:
            var(--navy);

    }


    .nav-links.open {

        display: flex;

    }


    .nav-links a {

        padding:
            12px 13px;

        font-size: 0.9rem;

    }


    .hero h1 {

        font-size: 2.7rem;

    }


    .hero-media,
    .hero-media img {

        min-height: 330px;

        height: 330px;

    }


    .hero-copy {

        padding:
            45px 25px;

    }


    .section {

        padding:
            66px 20px;

    }


    .visual-section {

        padding-left: 20px;

        padding-right: 20px;

    }


    .visual-card {

        grid-template-columns:
            1fr;

    }


    .visual-image-wrap,
    .visual-image-wrap img {

        min-height: 270px;

        height: 270px;

    }


    .det-grid,
    .sdg-grid,
    .quiz-grid {

        grid-template-columns:
            1fr;

    }


    .action-section {

        grid-template-columns:
            1fr;

    }


    .footer-inner {

        grid-template-columns:
            1fr;

        gap: 30px;

        padding:
            45px 20px 30px;

    }


    .footer-bottom {

        padding:
            18px 20px;

        flex-direction: column;

    }

}


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

@media (max-width: 520px) {

    .concept-grid {

        grid-template-columns:
            1fr;

    }


    .pathway {

        gap: 7px;

        font-size: 0.79rem;

    }


    .hero h1 {

        font-size: 2.3rem;

    }


    .hero-lead {

        font-size: 1.05rem;

    }


    .question-panel,
    .connect-card {

        padding: 23px;

    }


    .data-figure {

        padding: 10px;

    }


    .data-image-wrap {

        min-height: 280px;

    }


    .data-image-wrap img {

        min-width: 620px;

        max-height: none;

    }


    .next-links {

        flex-direction: column;

        align-items: stretch;

    }


    .next-links a {

        justify-content: center;

    }

}