/* ============================================================
   GLOBAL HEALTH EXPLORERS
   SUSTAINABLE DEVELOPMENT
   Complete Page Stylesheet
============================================================ */


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

:root {

    --sd-ink: #17324d;
    --sd-ink-deep: #0d2236;
    --sd-blue: #1f6f9f;
    --sd-blue-dark: #155277;
    --sd-blue-light: #eaf5fb;

    --sd-green: #2d8b70;
    --sd-green-dark: #206b56;
    --sd-green-light: #eaf7f2;

    --sd-gold: #d79a2b;
    --sd-gold-light: #fff7e6;

    --sd-purple: #7256a6;
    --sd-purple-light: #f2eef9;

    --sd-red: #b54a4a;
    --sd-red-light: #faeeee;

    --sd-text: #30485d;
    --sd-muted: #6b7e8e;

    --sd-bg: #f7fafc;
    --sd-white: #ffffff;
    --sd-border: #dce6ed;

    --sd-shadow:
        0 18px 50px rgba(20, 53, 77, 0.10);

    --sd-shadow-soft:
        0 8px 28px rgba(20, 53, 77, 0.08);

    --sd-radius: 18px;
    --sd-radius-lg: 28px;

    --sd-max: 1220px;

}


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

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family:
        Inter,
        "Segoe UI",
        Roboto,
        Helvetica,
        Arial,
        sans-serif;
    color: var(--sd-text);
    background: var(--sd-bg);
    line-height: 1.7;
}

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

button,
input {
    font: inherit;
}

button {
    cursor: pointer;
}

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

.container {
    width: min(
        calc(100% - 48px),
        var(--sd-max)
    );
    margin-inline: auto;
}


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

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.97);
    border-bottom: 1px solid var(--sd-border);
    box-shadow:
        0 4px 20px rgba(18, 52, 77, 0.06);
    backdrop-filter: blur(12px);
}

.header-inner {
    width: min(
        calc(100% - 36px),
        1380px
    );
    min-height: 82px;
    margin-inline: auto;

    display: flex;
    align-items: center;
    gap: 30px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.brand-logo {
    width: 55px;
    height: 55px;
    object-fit: contain;
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-name {
    color: var(--sd-ink);
    font-size: 1.05rem;
    font-weight: 800;
    line-height: 1.15;
}

.brand-tagline {
    color: var(--sd-muted);
    font-size: 0.68rem;
    margin-top: 4px;
    letter-spacing: 0.02em;
}

.main-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 4px;
    margin-left: auto;
}

.main-nav a {
    color: var(--sd-ink);
    font-size: 0.82rem;
    font-weight: 650;
    padding: 9px 10px;
    border-radius: 9px;
    transition:
        background 0.2s ease,
        color 0.2s ease;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--sd-blue);
    background: var(--sd-blue-light);
}

.nav-toggle {
    display: none;
    border: 0;
    background: transparent;
    width: 44px;
    height: 44px;
    padding: 9px;
    margin-left: auto;
}

.nav-toggle span {
    display: block;
    height: 2px;
    margin: 6px 0;
    background: var(--sd-ink);
}


/* ============================================================
   PAGE BAND
============================================================ */

.page-band {
    background: var(--sd-ink-deep);
    color: rgba(255, 255, 255, 0.8);
}

.breadcrumb {
    min-height: 45px;
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 0.76rem;
}

.breadcrumb a {
    color: #b9d8e9;
}

.breadcrumb a:hover {
    color: white;
}


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

.hero {
    position: relative;
    overflow: hidden;
    color: white;
    background:
        radial-gradient(
            circle at 80% 15%,
            rgba(75, 165, 177, 0.25),
            transparent 32%
        ),
        linear-gradient(
            135deg,
            #0b2439 0%,
            #124a69 55%,
            #236f78 100%
        );
}

.hero-orbit {
    position: absolute;
    border: 1px solid rgba(255, 255, 255, 0.10);
    border-radius: 50%;
    pointer-events: none;
}

.orbit-one {
    width: 700px;
    height: 700px;
    right: -300px;
    top: -260px;
}

.orbit-two {
    width: 520px;
    height: 520px;
    right: -210px;
    top: -170px;
}

.orbit-three {
    width: 340px;
    height: 340px;
    right: -120px;
    top: -80px;
}

.hero-grid {
    position: relative;
    z-index: 2;
    min-height: 600px;

    display: grid;
    grid-template-columns:
        minmax(0, 1.05fr)
        minmax(420px, 0.95fr);

    align-items: center;
    gap: 70px;
    padding-top: 75px;
    padding-bottom: 70px;
}

.eyebrow,
.section-kicker {
    display: inline-block;
    color: var(--sd-gold);
    font-size: 0.72rem;
    font-weight: 850;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.hero h1 {
    margin: 12px 0 16px;
    max-width: 720px;

    font-size:
        clamp(3rem, 6vw, 5.5rem);

    line-height: 0.98;
    letter-spacing: -0.055em;
}

.hero h1 span {
    display: block;
    color: #8ed8c4;
}

.hero-lead {
    margin: 0 0 13px;
    font-size: 1.35rem;
}

.hero-description {
    max-width: 650px;
    margin: 0;
    color: #d9eaf2;
    font-size: 1.04rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 30px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 11px 20px;
    border-radius: 10px;
    border: 1px solid transparent;
    font-size: 0.86rem;
    font-weight: 800;
    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease,
        background 0.2s ease;
}

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

.btn-primary {
    color: white;
    background: var(--sd-green);
    box-shadow:
        0 10px 24px rgba(45, 139, 112, 0.28);
}

.btn-primary:hover {
    background: var(--sd-green-dark);
}

.btn-secondary {
    color: white;
    border-color: rgba(255, 255, 255, 0.28);
    background: rgba(255, 255, 255, 0.08);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.14);
}

.btn-light {
    color: var(--sd-ink);
    background: white;
}

.hero-principle {
    max-width: 520px;
    margin-top: 38px;
    padding: 16px 18px;

    display: flex;
    gap: 14px;
    align-items: center;

    border-left: 3px solid var(--sd-gold);
    background: rgba(255, 255, 255, 0.06);
}

.principle-icon {
    font-size: 2rem;
    color: #8ed8c4;
}

.hero-principle strong {
    display: block;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.hero-principle p {
    margin: 2px 0 0;
    color: #c7dce7;
    font-size: 0.87rem;
}


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

.hero-visual {
    display: flex;
    justify-content: center;
}

.hero-visual-card {
    width: min(100%, 510px);
    padding: 17px;

    background:
        linear-gradient(
            145deg,
            rgba(255,255,255,0.96),
            rgba(242,249,251,0.94)
        );

    border:
        1px solid rgba(255,255,255,0.45);

    border-radius: 24px;

    box-shadow:
        0 35px 70px rgba(0, 0, 0, 0.25);

    transform:
        rotate(1deg);
}

.hero-visual-top,
.hero-visual-bottom {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    padding: 8px 5px;
    color: var(--sd-ink);
    font-size: 0.67rem;
    font-weight: 850;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero-visual-card img {
    width: 100%;
    border-radius: 13px;
}

.hero-visual-bottom {
    color: var(--sd-green-dark);
    letter-spacing: 0.03em;
    text-transform: none;
}


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

.hero-pathway {
    position: relative;
    z-index: 3;
    border-top: 1px solid rgba(255,255,255,0.12);
    background: rgba(5, 26, 41, 0.35);
}

.pathway-label {
    padding-top: 14px;
    color: #9bb9c8;
    font-size: 0.65rem;
    font-weight: 800;
    letter-spacing: 0.14em;
}

.pathway {
    min-height: 62px;

    display: flex;
    align-items: center;
    gap: 15px;

    color: #dcebf1;
    font-size: 0.83rem;
    font-weight: 700;
}

.pathway i {
    color: var(--sd-gold);
    font-style: normal;
}

.pathway .current {
    color: #8ed8c4;
}


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

.section {
    padding: 95px 0;
}

.section:nth-of-type(even) {
    background: white;
}

.section-heading {
    max-width: 850px;
    margin-bottom: 42px;
}

.section-heading.centered {
    max-width: 820px;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.section-heading h2 {
    margin: 8px 0 14px;
    color: var(--sd-ink);
    font-size:
        clamp(2rem, 4vw, 3.1rem);
    line-height: 1.08;
    letter-spacing: -0.04em;
}

.section-heading h2 span,
.definition-copy h2 span,
.health-sdg-copy h2 span,
.action-intro h2 span,
.nextgenu-section h2 span,
.reflection-heading h2 span {
    color: var(--sd-green);
}

.section-heading p {
    margin: 0;
    color: var(--sd-muted);
    font-size: 1rem;
}


/* ============================================================
   FUTURE GRID
============================================================ */

.intro-section {
    background: white;
}

.future-grid {
    display: grid;
    grid-template-columns:
        repeat(5, minmax(0, 1fr));
    gap: 16px;
}

.future-card {
    position: relative;
    padding: 27px 22px 24px;
    min-height: 275px;

    border: 1px solid var(--sd-border);
    border-radius: var(--sd-radius);
    background: #fbfdfe;

    box-shadow: var(--sd-shadow-soft);

    transition:
        transform 0.22s ease,
        box-shadow 0.22s ease;
}

.future-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--sd-shadow);
}

.future-number {
    position: absolute;
    top: 16px;
    right: 17px;
    color: #cbdbe4;
    font-size: 0.72rem;
    font-weight: 900;
}

.future-icon {
    margin-bottom: 18px;
    font-size: 2rem;
}

.future-card h3 {
    margin: 0 0 9px;
    color: var(--sd-ink);
    font-size: 1.15rem;
}

.future-card p {
    margin: 0;
    color: var(--sd-muted);
    font-size: 0.84rem;
}


/* ============================================================
   DEFINITION
============================================================ */

.definition-section {
    background:
        linear-gradient(
            135deg,
            #edf7f6,
            #f7fafc
        );
}

.definition-grid {
    display: grid;
    grid-template-columns:
        minmax(0, 1fr)
        minmax(350px, 0.85fr);
    align-items: center;
    gap: 90px;
}

.definition-copy h2 {
    margin: 9px 0 20px;
    color: var(--sd-ink);
    font-size: clamp(2.2rem, 4vw, 3.5rem);
    line-height: 1.06;
    letter-spacing: -0.045em;
}

.definition-copy p {
    color: var(--sd-text);
    font-size: 0.98rem;
}

.definition-highlight {
    margin-top: 28px;
    padding: 18px 20px;
    border-left: 4px solid var(--sd-green);
    border-radius: 0 12px 12px 0;
    background: white;
    box-shadow: var(--sd-shadow-soft);
}

.definition-highlight strong {
    display: block;
    color: var(--sd-green-dark);
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.definition-highlight span {
    display: block;
    margin-top: 5px;
    color: var(--sd-ink);
    font-size: 1.1rem;
    font-weight: 750;
}


/* ============================================================
   DEFINITION MODEL
============================================================ */

.definition-model {
    position: relative;
    width: 380px;
    height: 380px;
    max-width: 100%;
    margin-inline: auto;
}

.model-ring {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(45,139,112,0.22);
}

.ring-outer {
    inset: 0;
    background:
        radial-gradient(
            circle,
            rgba(45,139,112,0.08),
            transparent 65%
        );
}

.ring-middle {
    inset: 55px;
    background:
        radial-gradient(
            circle,
            rgba(31,111,159,0.10),
            transparent 68%
        );
    border-color: rgba(31,111,159,0.25);
}

.model-core {
    position: absolute;
    inset: 72px;

    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;

    border-radius: 50%;
    color: white;
    background:
        linear-gradient(
            145deg,
            var(--sd-blue),
            var(--sd-green)
        );

    box-shadow:
        0 20px 50px rgba(31,111,159,0.22);
}

.model-core span {
    font-size: 0.7rem;
    letter-spacing: 0.15em;
}

.model-core strong {
    font-size: 1.7rem;
}

.model-label {
    position: absolute;
    padding: 7px 11px;
    border-radius: 20px;
    background: white;
    color: var(--sd-ink);
    font-size: 0.72rem;
    font-weight: 800;
    box-shadow: var(--sd-shadow-soft);
}

.label-top {
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
}

.label-right {
    right: 2px;
    top: 50%;
    transform: translateY(-50%);
}

.label-bottom {
    bottom: 5px;
    left: 50%;
    transform: translateX(-50%);
}

.label-left {
    left: 2px;
    top: 50%;
    transform: translateY(-50%);
}


/* ============================================================
   SDG SECTION
============================================================ */

.sdg-section {
    background: #f4f8fa;
}

.sdg-image-card {
    max-width: 1050px;
    margin: 0 auto 45px;
    padding: 18px;
    border-radius: var(--sd-radius-lg);
    background: white;
    box-shadow: var(--sd-shadow);
}

.sdg-image-card img {
    width: 100%;
    border-radius: 14px;
}

.image-caption {
    padding: 13px 6px 3px;
    color: var(--sd-muted);
    font-size: 0.75rem;
    text-align: center;
}


/* ============================================================
   SDG GRID
============================================================ */

.sdg-grid {
    display: grid;
    grid-template-columns:
        repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.sdg-card {
    min-height: 205px;
    padding: 21px;
    border-radius: 16px;
    background: white;
    border: 1px solid var(--sd-border);
    box-shadow: var(--sd-shadow-soft);

    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease;
}

.sdg-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--sd-shadow);
}

.sdg-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    margin-bottom: 15px;

    border-radius: 9px;

    color: white;
    background: var(--sd-ink);

    font-size: 0.74rem;
    font-weight: 900;
}

.sdg-card h3 {
    margin: 0 0 8px;
    color: var(--sd-ink);
    font-size: 1rem;
    line-height: 1.25;
}

.sdg-card p {
    margin: 0;
    color: var(--sd-muted);
    font-size: 0.79rem;
    line-height: 1.6;
}

.sdg-3 .sdg-number {
    background: var(--sd-green);
}

.sdg-6 .sdg-number {
    background: var(--sd-blue);
}

.sdg-10 .sdg-number {
    background: var(--sd-purple);
}

.sdg-13 .sdg-number {
    background: var(--sd-green-dark);
}

.sdg-16 .sdg-number {
    background: var(--sd-blue-dark);
}

.sdg-17 .sdg-number {
    background: var(--sd-gold);
}


/* ============================================================
   CONNECTION BOARD
============================================================ */

.connections-section {
    background: white;
}

.connection-board {
    position: relative;
    max-width: 850px;
    height: 590px;
    margin: 0 auto 45px;
}

.connection-board::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    width: 420px;
    height: 420px;
    transform: translate(-50%, -50%);
    border: 1px dashed #c5d9df;
    border-radius: 50%;
}

.connection-board::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    width: 255px;
    height: 255px;
    transform: translate(-50%, -50%);
    border: 1px dashed #d5e4e8;
    border-radius: 50%;
}

.connection-center {
    position: absolute;
    left: 50%;
    top: 50%;
    z-index: 3;

    width: 150px;
    height: 150px;

    transform: translate(-50%, -50%);

    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;

    border-radius: 50%;

    color: white;
    background:
        linear-gradient(
            145deg,
            var(--sd-blue),
            var(--sd-green)
        );

    box-shadow:
        0 20px 50px rgba(31,111,159,0.25);
}

.connection-center span {
    font-size: 0.62rem;
    letter-spacing: 0.13em;
}

.connection-center strong {
    font-size: 2rem;
}

.connection-node {
    position: absolute;
    z-index: 4;

    width: 110px;
    height: 110px;

    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;

    border-radius: 50%;

    background: white;
    border: 1px solid var(--sd-border);

    box-shadow: var(--sd-shadow-soft);
}

.connection-node strong {
    color: var(--sd-blue);
    font-size: 0.95rem;
}

.connection-node span {
    color: var(--sd-muted);
    font-size: 0.7rem;
    font-weight: 700;
}

.node-one {
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
}

.node-two {
    top: 90px;
    right: 110px;
}

.node-three {
    bottom: 95px;
    right: 80px;
}

.node-four {
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
}

.node-five {
    bottom: 95px;
    left: 80px;
}

.node-six {
    top: 90px;
    left: 110px;
}

.node-seven {
    top: 185px;
    right: 15px;
}

.node-eight {
    top: 185px;
    left: 15px;
}

.connection-examples {
    display: grid;
    grid-template-columns:
        repeat(4, minmax(0, 1fr));
    gap: 15px;
}

.connection-example {
    padding: 22px;
    border-radius: 16px;
    background: var(--sd-bg);
    border: 1px solid var(--sd-border);
}

.example-arrow {
    color: var(--sd-green);
    font-size: 1.5rem;
    font-weight: 900;
}

.connection-example strong {
    display: block;
    margin-top: 5px;
    color: var(--sd-ink);
}

.connection-example p {
    margin: 7px 0 0;
    color: var(--sd-muted);
    font-size: 0.78rem;
}


/* ============================================================
   HEALTH SDG
============================================================ */

.health-sdg-section {
    color: white;
    background:
        linear-gradient(
            135deg,
            #0e3047,
            #1a6670
        );
}

.health-sdg-grid {
    display: grid;
    grid-template-columns: 250px 1fr;
    align-items: center;
    gap: 70px;
}

.health-sdg-section .section-kicker {
    color: #a8ddcb;
}

.health-sdg-badge {
    width: 220px;
    height: 220px;

    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;

    border-radius: 50%;

    background:
        radial-gradient(
            circle at 35% 30%,
            rgba(255,255,255,0.17),
            transparent 35%
        ),
        rgba(255,255,255,0.08);

    border:
        1px solid rgba(255,255,255,0.18);

    box-shadow:
        0 25px 60px rgba(0,0,0,0.18);
}

.health-number {
    font-size: 4.5rem;
    line-height: 1;
    font-weight: 900;
}

.health-sdg-badge span {
    margin-top: 10px;
    text-align: center;
    font-size: 0.68rem;
    font-weight: 850;
    letter-spacing: 0.1em;
}

.health-sdg-copy h2 {
    margin: 8px 0 18px;
    color: white;
    font-size: clamp(2rem, 4vw, 3.2rem);
    line-height: 1.08;
    letter-spacing: -0.04em;
}

.health-sdg-copy p {
    color: #d9ebf0;
}

.health-chain {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin: 27px 0;
}

.health-chain span {
    padding: 8px 12px;
    border-radius: 8px;
    color: #dff5ed;
    background: rgba(255,255,255,0.09);
    border: 1px solid rgba(255,255,255,0.13);
    font-size: 0.75rem;
    font-weight: 750;
}

.health-chain b {
    color: #a8ddcb;
}

.small-note {
    font-size: 0.78rem;
}


/* ============================================================
   DEVELOPMENT
============================================================ */

.development-section {
    background: white;
}

.development-pillars {
    display: grid;
    grid-template-columns:
        repeat(5, minmax(0, 1fr));
    gap: 14px;
}

.development-pillars article {
    padding: 25px 20px;
    border-radius: 17px;
    background: var(--sd-bg);
    border: 1px solid var(--sd-border);
}

.development-pillars span {
    color: var(--sd-green);
    font-size: 0.72rem;
    font-weight: 900;
}

.development-pillars h3 {
    margin: 12px 0 8px;
    color: var(--sd-ink);
}

.development-pillars p {
    margin: 0;
    color: var(--sd-muted);
    font-size: 0.79rem;
}

.development-quote {
    max-width: 850px;
    margin: 50px auto 0;
    padding: 32px 40px;

    text-align: center;

    border-radius: 20px;
    background:
        linear-gradient(
            135deg,
            var(--sd-green-light),
            var(--sd-blue-light)
        );
}

.quote-mark {
    color: var(--sd-green);
    font-size: 3rem;
    line-height: 0.5;
}

.development-quote p {
    margin: 14px 0;
    color: var(--sd-ink);
    font-size: 1.25rem;
    font-weight: 700;
}

.development-quote small {
    color: var(--sd-muted);
}


/* ============================================================
   SYSTEMS LAB
============================================================ */

.systems-section {
    background: #f4f8fa;
}

.systems-lab {
    overflow: hidden;
    border-radius: 24px;
    border: 1px solid var(--sd-border);
    background: white;
    box-shadow: var(--sd-shadow);
}

.scenario-card {
    padding: 34px 38px;
    color: white;
    background:
        linear-gradient(
            135deg,
            var(--sd-ink),
            var(--sd-blue)
        );
}

.scenario-label {
    color: #9ed9c8;
    font-size: 0.67rem;
    font-weight: 900;
    letter-spacing: 0.13em;
}

.scenario-card h3 {
    max-width: 850px;
    margin: 9px 0 9px;
    font-size: 1.5rem;
    line-height: 1.25;
}

.scenario-card p {
    max-width: 850px;
    margin: 0;
    color: #d4e5ed;
    font-size: 0.88rem;
}

.system-flow {
    padding: 35px 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 11px;
}

.flow-box {
    width: 190px;
    min-height: 130px;
    padding: 17px;
    border-radius: 15px;
    background: var(--sd-bg);
    border: 1px solid var(--sd-border);
}

.flow-box span {
    display: block;
    color: var(--sd-green);
    font-size: 0.65rem;
    font-weight: 900;
}

.flow-box strong {
    display: block;
    margin-top: 9px;
    color: var(--sd-ink);
    font-size: 0.87rem;
}

.flow-box small {
    display: block;
    margin-top: 5px;
    color: var(--sd-muted);
    font-size: 0.7rem;
}

.flow-arrow {
    color: var(--sd-green);
    font-size: 1.4rem;
    font-weight: 900;
}

.systems-question {
    padding: 32px;
    border-top: 1px solid var(--sd-border);
    background: #fbfdfe;
}

.systems-question h3 {
    margin: 0;
    color: var(--sd-ink);
}

.systems-question > p {
    margin: 5px 0 20px;
    color: var(--sd-muted);
}

.answer-grid {
    display: grid;
    grid-template-columns:
        repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.thinking-answer {
    padding: 18px;
    text-align: left;
    border-radius: 13px;
    border: 1px solid var(--sd-border);
    background: white;
    transition:
        border-color 0.2s ease,
        background 0.2s ease,
        transform 0.2s ease;
}

.thinking-answer:hover,
.thinking-answer.selected {
    border-color: var(--sd-green);
    background: var(--sd-green-light);
    transform: translateY(-2px);
}

.thinking-answer strong {
    display: block;
    color: var(--sd-ink);
}

.thinking-answer span {
    display: block;
    margin-top: 4px;
    color: var(--sd-muted);
    font-size: 0.73rem;
}

.thinking-feedback {
    display: none;
    margin-top: 18px;
    padding: 13px 16px;
    border-radius: 10px;
    color: var(--sd-green-dark);
    background: var(--sd-green-light);
    font-size: 0.82rem;
    font-weight: 650;
}

.thinking-feedback.visible {
    display: block;
}


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

.sdh-section {
    background: white;
}

.sdh-levels {
    display: grid;
    grid-template-columns:
        repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.sdh-level {
    padding: 28px;
    border-radius: 18px;
    border: 1px solid var(--sd-border);
    background: #fbfdfe;
}

.sdh-level-number {
    color: var(--sd-blue);
    font-size: 0.7rem;
    font-weight: 900;
}

.sdh-level h3 {
    margin: 10px 0 6px;
    color: var(--sd-ink);
    font-size: 1.35rem;
}

.sdh-level p {
    margin: 0 0 15px;
    color: var(--sd-muted);
    font-size: 0.82rem;
}

.sdh-level ul {
    margin: 0;
    padding-left: 18px;
    color: var(--sd-text);
    font-size: 0.8rem;
}

.sdh-level li {
    margin: 5px 0;
}

.sdh-statement {
    margin-top: 22px;
    padding: 25px 28px;
    border-radius: 16px;
    background:
        linear-gradient(
            135deg,
            var(--sd-gold-light),
            #fffdf7
        );
    border: 1px solid #f0dfb7;
}

.sdh-statement strong {
    color: #936819;
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.sdh-statement p {
    margin: 7px 0 0;
    color: var(--sd-ink);
    font-weight: 650;
}


/* ============================================================
   MATRIX
============================================================ */

.matrix-section {
    background: #f4f8fa;
}

.matrix-wrap {
    overflow-x: auto;
    border-radius: 18px;
    border: 1px solid var(--sd-border);
    box-shadow: var(--sd-shadow-soft);
}

.sd-matrix {
    width: 100%;
    min-width: 850px;
    border-collapse: collapse;
    background: white;
}

.sd-matrix th {
    padding: 16px;
    color: white;
    background: var(--sd-ink);
    text-align: left;
    font-size: 0.73rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.sd-matrix td {
    padding: 16px;
    border-top: 1px solid var(--sd-border);
    color: var(--sd-text);
    font-size: 0.8rem;
    vertical-align: top;
}

.sd-matrix td:first-child {
    width: 70px;
    color: var(--sd-green);
    font-weight: 900;
}

.sd-matrix tr:hover td {
    background: #f8fbfc;
}


/* ============================================================
   ACTION
============================================================ */

.action-section {
    background:
        linear-gradient(
            135deg,
            #eaf6f2,
            #eef7fb
        );
}

.action-card {
    overflow: hidden;
    border-radius: 24px;
    border: 1px solid #d7e8e4;
    background: white;
    box-shadow: var(--sd-shadow);
}

.action-intro {
    padding: 40px;
    text-align: center;
}

.action-intro h2 {
    margin: 9px 0 13px;
    color: var(--sd-ink);
    font-size: clamp(2rem, 4vw, 3rem);
}

.action-intro p {
    max-width: 700px;
    margin: 0 auto;
    color: var(--sd-muted);
}

.action-steps {
    display: grid;
    grid-template-columns:
        repeat(6, minmax(0, 1fr));
    border-top: 1px solid var(--sd-border);
    border-bottom: 1px solid var(--sd-border);
}

.action-step {
    min-height: 170px;
    padding: 22px;
    border-right: 1px solid var(--sd-border);
}

.action-step:last-child {
    border-right: 0;
}

.action-step > span {
    display: inline-flex;
    width: 32px;
    height: 32px;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: white;
    background: var(--sd-green);
    font-size: 0.68rem;
    font-weight: 900;
}

.action-step strong {
    display: block;
    margin-top: 12px;
    color: var(--sd-ink);
}

.action-step p {
    margin: 4px 0 0;
    color: var(--sd-muted);
    font-size: 0.73rem;
}

.action-principle {
    padding: 23px;
    text-align: center;
    color: var(--sd-green-dark);
    font-size: 0.8rem;
    font-weight: 900;
    letter-spacing: 0.12em;
}


/* ============================================================
   NEXTGENU
============================================================ */

.nextgenu-section {
    background: white;
}

.nextgenu-grid {
    display: grid;
    grid-template-columns: 180px 1fr;
    align-items: center;
    gap: 55px;
    max-width: 950px;
}

.nextgenu-mark {
    width: 150px;
    height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 32px;
    color: white;
    background:
        linear-gradient(
            145deg,
            var(--sd-purple),
            var(--sd-blue)
        );
    box-shadow:
        0 22px 45px rgba(114,86,166,0.22);
}

.nextgenu-mark span {
    font-size: 1.8rem;
    font-weight: 950;
    letter-spacing: -0.08em;
}

.nextgenu-grid h2 {
    margin: 8px 0 15px;
    color: var(--sd-ink);
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.05;
}

.nextgenu-grid p {
    color: var(--sd-muted);
}

.text-link {
    display: inline-block;
    margin-top: 7px;
    color: var(--sd-blue);
    font-size: 0.84rem;
    font-weight: 850;
}

.text-link:hover {
    color: var(--sd-green-dark);
}


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

.quiz-section {
    background: #f4f8fa;
}

.quiz-container {
    display: grid;
    grid-template-columns:
        repeat(2, minmax(0, 1fr));
    gap: 17px;
}

.quiz-question {
    padding: 25px;
    border-radius: 17px;
    border: 1px solid var(--sd-border);
    background: white;
    box-shadow: var(--sd-shadow-soft);
}

.question-number {
    display: inline-flex;
    padding: 5px 9px;
    border-radius: 7px;
    color: var(--sd-green-dark);
    background: var(--sd-green-light);
    font-size: 0.68rem;
    font-weight: 900;
}

.quiz-question h3 {
    margin: 12px 0 17px;
    color: var(--sd-ink);
    font-size: 1rem;
    line-height: 1.4;
}

.quiz-question label {
    display: block;
    margin: 8px 0;
    padding: 10px 12px;
    border-radius: 9px;
    color: var(--sd-text);
    background: #f8fafb;
    font-size: 0.78rem;
    cursor: pointer;
}

.quiz-question label:hover {
    background: var(--sd-blue-light);
}

.quiz-question input {
    margin-right: 7px;
    accent-color: var(--sd-green);
}

.quiz-feedback {
    min-height: 20px;
    margin-top: 11px;
    font-size: 0.72rem;
    font-weight: 700;
}

.quiz-feedback.correct {
    color: var(--sd-green-dark);
}

.quiz-feedback.incorrect {
    color: var(--sd-red);
}

.quiz-feedback.unanswered {
    color: #8d6c22;
}

.quiz-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 35px;
}

.quiz-score {
    display: none;
    max-width: 700px;
    margin: 25px auto 0;
    padding: 18px;
    text-align: center;
    border-radius: 13px;
    color: var(--sd-green-dark);
    background: var(--sd-green-light);
    border: 1px solid #cde8dd;
    font-weight: 800;
}

.quiz-score.visible {
    display: block;
}


/* ============================================================
   REFLECTION
============================================================ */

.reflection-section {
    background: white;
}

.reflection-card {
    overflow: hidden;
    border-radius: 25px;
    background:
        linear-gradient(
            135deg,
            #102e43,
            #1b6570
        );
    color: white;
    box-shadow: var(--sd-shadow);
}

.reflection-heading {
    padding: 45px 45px 25px;
}

.reflection-heading .section-kicker {
    color: #a7dccb;
}

.reflection-heading h2 {
    max-width: 700px;
    margin: 8px 0 0;
    font-size: clamp(2.2rem, 4vw, 3.4rem);
    line-height: 1.06;
}

.reflection-prompts {
    display: grid;
    grid-template-columns:
        repeat(3, minmax(0, 1fr));
    border-top: 1px solid rgba(255,255,255,0.12);
}

.reflection-prompts > div {
    padding: 30px;
    border-right: 1px solid rgba(255,255,255,0.12);
}

.reflection-prompts > div:last-child {
    border-right: 0;
}

.reflection-prompts span {
    color: #8ed8c4;
    font-size: 0.7rem;
    font-weight: 900;
}

.reflection-prompts p {
    margin: 9px 0 0;
    color: #d7e8ee;
    font-size: 0.85rem;
}

.reflection-footer {
    padding: 25px;
    text-align: center;
    border-top: 1px solid rgba(255,255,255,0.12);
    color: #a8ddcb;
    letter-spacing: 0.07em;
    font-size: 0.76rem;
}


/* ============================================================
   TRUSTED SOURCES
============================================================ */

.sources-section {
    background: #f4f8fa;
}

.sources-grid {
    display: grid;
    grid-template-columns:
        repeat(4, minmax(0, 1fr));
    gap: 15px;
}

.source-card {
    min-height: 205px;
    padding: 24px;

    display: flex;
    flex-direction: column;

    border-radius: 18px;
    background: white;
    border: 1px solid var(--sd-border);

    box-shadow: var(--sd-shadow-soft);

    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease;
}

.source-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--sd-shadow);
}

.source-logo {
    display: inline-flex;
    width: 50px;
    height: 50px;
    align-items: center;
    justify-content: center;

    border-radius: 13px;

    color: white;
    background: var(--sd-ink);

    font-size: 0.8rem;
    font-weight: 950;
}

.source-card:nth-child(2) .source-logo {
    background: var(--sd-blue);
}

.source-card:nth-child(3) .source-logo {
    background: var(--sd-green);
}

.source-card:nth-child(4) .source-logo {
    background: var(--sd-purple);
}

.source-card h3 {
    margin: 19px 0 6px;
    color: var(--sd-ink);
    font-size: 1rem;
}

.source-card p {
    margin: 0;
    color: var(--sd-muted);
    font-size: 0.76rem;
}

.source-arrow {
    margin-top: auto;
    padding-top: 17px;
    color: var(--sd-blue);
    font-size: 1.1rem;
    font-weight: 900;
}

.sources-note {
    margin: 25px auto 0;
    max-width: 800px;
    color: var(--sd-muted);
    font-size: 0.72rem;
    text-align: center;
}


/* ============================================================
   FINAL MESSAGE
============================================================ */

.final-message {
    color: white;
    background:
        linear-gradient(
            135deg,
            #0b263c,
            #155b69
        );
}

.final-message-inner {
    padding: 100px 0;
    text-align: center;
}

.final-symbol {
    display: block;
    color: #8ed8c4;
    font-size: 3rem;
    line-height: 1;
}

.final-message h2 {
    margin: 18px 0;
    font-size: clamp(2.2rem, 5vw, 4.2rem);
    line-height: 1.05;
    letter-spacing: -0.045em;
}

.final-message p {
    max-width: 650px;
    margin: 0 auto 28px;
    color: #d3e7ed;
    font-size: 1rem;
}


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

.site-footer {
    color: #c9d8e1;
    background: #091b2b;
}

.footer-grid {
    display: grid;
    grid-template-columns:
        1.5fr 0.7fr 0.7fr;
    gap: 65px;
    padding: 65px 0;
}

.footer-brand img {
    width: 70px;
    height: 70px;
    object-fit: contain;
    margin-bottom: 18px;
}

.footer-brand p {
    max-width: 550px;
    margin: 0 0 15px;
    color: #a9bfcb;
    font-size: 0.77rem;
    line-height: 1.75;
}

.footer-brand strong {
    color: #8ed8c4;
    font-size: 0.76rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 9px;
}

.footer-links h3 {
    margin: 0 0 8px;
    color: white;
    font-size: 0.86rem;
}

.footer-links a {
    color: #a9bfcb;
    font-size: 0.75rem;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.09);
}

.footer-bottom .container {
    min-height: 75px;

    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.incorporation {
    color: #b8cbd5;
    font-size: 0.69rem;
    font-weight: 700;
}

.incorporation span {
    margin: 0 5px;
    color: var(--sd-gold);
}

.copyright {
    color: #8299a8;
    font-size: 0.66rem;
}


/* ============================================================
   RESPONSIVE — 1100
============================================================ */

@media (max-width: 1100px) {

    .main-nav a {
        padding-inline: 7px;
        font-size: 0.75rem;
    }

    .hero-grid {
        gap: 45px;
    }

    .future-grid {
        grid-template-columns:
            repeat(3, minmax(0, 1fr));
    }

    .sdg-grid {
        grid-template-columns:
            repeat(3, minmax(0, 1fr));
    }

    .development-pillars {
        grid-template-columns:
            repeat(3, minmax(0, 1fr));
    }

    .action-steps {
        grid-template-columns:
            repeat(3, minmax(0, 1fr));
    }

    .action-step:nth-child(3) {
        border-right: 0;
    }

    .action-step:nth-child(n + 4) {
        border-top: 1px solid var(--sd-border);
    }

    .sources-grid {
        grid-template-columns:
            repeat(2, minmax(0, 1fr));
    }

}


/* ============================================================
   RESPONSIVE — 900
============================================================ */

@media (max-width: 900px) {

    .header-inner {
        min-height: 72px;
    }

    .nav-toggle {
        display: block;
    }

    .main-nav {
        position: absolute;
        left: 0;
        right: 0;
        top: 72px;

        display: none;
        flex-direction: column;
        align-items: stretch;

        padding: 12px 18px 18px;

        background: white;
        border-bottom: 1px solid var(--sd-border);
        box-shadow: var(--sd-shadow);
    }

    .main-nav.nav-open {
        display: flex;
    }

    .main-nav a {
        padding: 12px 14px;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        padding-top: 60px;
    }

    .hero-content {
        text-align: center;
    }

    .hero-description {
        margin-inline: auto;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-principle {
        margin-inline: auto;
        text-align: left;
    }

    .hero-visual {
        margin-top: 10px;
    }

    .definition-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }

    .definition-copy {
        text-align: center;
    }

    .definition-highlight {
        text-align: left;
    }

    .health-sdg-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 35px;
    }

    .health-sdg-badge {
        margin-inline: auto;
    }

    .health-chain {
        justify-content: center;
    }

    .nextgenu-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .nextgenu-mark {
        margin-inline: auto;
    }

    .connection-examples {
        grid-template-columns:
            repeat(2, minmax(0, 1fr));
    }

    .sdh-levels {
        grid-template-columns: 1fr;
    }

    .quiz-container {
        grid-template-columns: 1fr;
    }

    .reflection-prompts {
        grid-template-columns: 1fr;
    }

    .reflection-prompts > div {
        border-right: 0;
        border-bottom: 1px solid rgba(255,255,255,0.12);
    }

    .reflection-prompts > div:last-child {
        border-bottom: 0;
    }

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

    .footer-brand {
        grid-column: 1 / -1;
    }

}


/* ============================================================
   RESPONSIVE — 700
============================================================ */

@media (max-width: 700px) {

    .container {
        width: min(
            calc(100% - 30px),
            var(--sd-max)
        );
    }

    .brand-tagline {
        display: none;
    }

    .brand-name {
        font-size: 0.92rem;
    }

    .brand-logo {
        width: 47px;
        height: 47px;
    }

    .section {
        padding: 70px 0;
    }

    .hero h1 {
        font-size: 3.25rem;
    }

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

    .hero-visual-card {
        transform: none;
    }

    .pathway {
        gap: 7px;
        flex-wrap: wrap;
        padding: 12px 0 16px;
        line-height: 1.4;
    }

    .pathway-label {
        padding-top: 12px;
    }

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

    .future-card {
        min-height: auto;
    }

    .sdg-grid {
        grid-template-columns:
            repeat(2, minmax(0, 1fr));
    }

    .connection-board {
        height: 470px;
        transform: scale(0.82);
        transform-origin: top center;
        margin-bottom: -70px;
    }

    .connection-board::before {
        width: 330px;
        height: 330px;
    }

    .connection-board::after {
        width: 205px;
        height: 205px;
    }

    .node-two {
        right: 40px;
    }

    .node-three {
        right: 30px;
    }

    .node-five {
        left: 30px;
    }

    .node-six {
        left: 40px;
    }

    .connection-examples {
        grid-template-columns: 1fr;
    }

    .development-pillars {
        grid-template-columns:
            repeat(2, minmax(0, 1fr));
    }

    .system-flow {
        flex-direction: column;
    }

    .flow-arrow {
        transform: rotate(90deg);
    }

    .flow-box {
        width: 100%;
        min-height: auto;
    }

    .answer-grid {
        grid-template-columns:
            repeat(2, minmax(0, 1fr));
    }

    .action-steps {
        grid-template-columns:
            repeat(2, minmax(0, 1fr));
    }

    .action-step:nth-child(3) {
        border-right: 1px solid var(--sd-border);
    }

    .action-step:nth-child(odd) {
        border-right: 1px solid var(--sd-border);
    }

    .action-step:nth-child(even) {
        border-right: 0;
    }

    .action-step:nth-child(n + 3) {
        border-top: 1px solid var(--sd-border);
    }

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

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 35px;
    }

    .footer-brand {
        grid-column: auto;
    }

    .footer-bottom .container {
        padding: 20px 0;
        flex-direction: column;
        align-items: flex-start;
    }

}


/* ============================================================
   RESPONSIVE — 520
============================================================ */

@media (max-width: 520px) {

    .hero h1 {
        font-size: 2.75rem;
    }

    .hero-lead {
        font-size: 1.12rem;
    }

    .hero-description {
        font-size: 0.91rem;
    }

    .hero-actions {
        flex-direction: column;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .hero-visual-top,
    .hero-visual-bottom {
        flex-wrap: wrap;
        justify-content: center;
    }

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

    .development-pillars {
        grid-template-columns: 1fr;
    }

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

    .action-steps {
        grid-template-columns: 1fr;
    }

    .action-step,
    .action-step:nth-child(even),
    .action-step:nth-child(odd) {
        border-right: 0;
        border-top: 1px solid var(--sd-border);
    }

    .action-step:first-child {
        border-top: 0;
    }

    .quiz-actions {
        flex-direction: column;
    }

    .quiz-actions .btn {
        width: 100%;
    }

    .reflection-heading {
        padding: 32px 25px 20px;
    }

    .reflection-prompts > div {
        padding: 25px;
    }

    .final-message-inner {
        padding: 75px 0;
    }

    .final-message h2 {
        font-size: 2.2rem;
    }

    .incorporation {
        line-height: 1.8;
    }

}


/* ============================================================
   ACCESSIBILITY
============================================================ */

:focus-visible {
    outline: 3px solid rgba(45,139,112,0.45);
    outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {

    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }

}


/* ============================================================
   PRINT
============================================================ */

@media print {

    .site-header,
    .nav-toggle,
    .hero-actions,
    .quiz-actions,
    .systems-question,
    .site-footer {
        display: none !important;
    }

    .section {
        padding: 35px 0;
    }

    .hero {
        color: black;
        background: white;
    }

    .hero h1,
    .section-heading h2,
    .definition-copy h2 {
        color: black;
    }

}