/* =========================================================
   PHYSICAL ACTIVITY & ACTIVE LIVING
   Global Health Explorers
   Version 2.0
========================================================= */

:root {
    --pa-blue: #0f4c81;
    --pa-blue-dark: #083653;
    --pa-teal: #159a9c;
    --pa-green: #3b8d61;
    --pa-light: #f3f8f7;
    --pa-white: #ffffff;
    --pa-dark: #18323b;
    --pa-muted: #60747b;
    --pa-gold: #e3a83b;
    --pa-border: #dbe8e5;
    --pa-soft-blue: #f2f7fb;
    --pa-soft-gold: #fff8e8;
    --pa-soft-teal: #eef8f6;
    --pa-shadow: 0 12px 35px rgba(15, 76, 129, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    color: var(--pa-dark);
    background: #ffffff;
    line-height: 1.7;
}

.pa-container {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
}

.pa-container p {
    max-width: 900px;
}

.pa-container h2 {
    letter-spacing: -0.5px;
}

.pa-section-label {
    margin-bottom: 0.7rem;
    color: var(--pa-teal);
    font-size: 0.78rem;
    letter-spacing: 2px;
    font-weight: 900;
    text-transform: uppercase;
}

.pa-section h2,
.pa-who-core h2,
.pa-sdgs h2,
.pa-reflect h2,
.pa-action h2,
.pa-quiz h2,
.pa-principle h2,
.pa-evidence h2,
.pa-physiology h2,
.pa-fitness h2,
.pa-fitt h2,
.pa-inequality h2,
.pa-environment h2 {
    margin-top: 0;
    margin-bottom: 1.2rem;
    color: var(--pa-blue-dark);
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.15;
}

.intro {
    max-width: 800px;
    color: var(--pa-muted);
}

/* =========================================================
   NAVIGATION
========================================================= */

body {
    min-width: 320px;
}

.nav {
    position: relative;
    z-index: 100;
}

.nav-container {
    position: relative;
    z-index: 101;
}

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

.pa-hero {
    position: relative;
    isolation: isolate;
    min-height: 62vh;
    display: flex;
    align-items: center;
    background:
        linear-gradient(135deg, #0b405f, #158b8d);
    overflow: hidden;
}

.pa-hero::before {
    content: "";
    position: absolute;
    width: 520px;
    height: 520px;
    border-radius: 50%;
    border: 90px solid rgba(255, 255, 255, 0.045);
    right: -190px;
    bottom: -220px;
    z-index: 0;
}

.pa-hero::after {
    content: "";
    position: absolute;
    width: 420px;
    height: 420px;
    border-radius: 50%;
    border: 70px solid rgba(255, 255, 255, 0.08);
    right: -120px;
    top: -100px;
    z-index: 0;
}

.pa-hero-overlay {
    position: absolute;
    inset: 0;
    z-index: 1;
    background:
        linear-gradient(
            90deg,
            rgba(4, 35, 53, 0.87),
            rgba(10, 92, 103, 0.42)
        );
}

.pa-hero-content {
    position: relative;
    z-index: 2;
    width: min(900px, calc(100% - 40px));
    margin: 0 auto;
    color: white;
}

.pa-kicker {
    display: inline-block;
    margin-bottom: 1rem;
    font-size: 0.82rem;
    letter-spacing: 2px;
    font-weight: 800;
    color: #d8f4ed;
}

.pa-hero h1 {
    margin: 0;
    max-width: 900px;
    font-size: clamp(2.8rem, 7vw, 5.5rem);
    line-height: 1.03;
    letter-spacing: -2px;
}

.pa-hero p {
    max-width: 760px;
    margin-top: 1.5rem;
    font-size: clamp(1.1rem, 2vw, 1.45rem);
    color: #eefcf9;
}

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

.pa-section {
    padding: 5rem 0;
}

.pa-section:nth-of-type(even) {
    background: var(--pa-light);
}

/* =========================================================
   WHO CORE
========================================================= */

.pa-who-core {
    padding: 5rem 0;
    background: #eef8f6;
}

.who-recommendation {
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 3rem;
    align-items: center;
    margin-top: 2rem;
    padding: 3rem;
    background: white;
    border-radius: 24px;
    border: 1px solid var(--pa-border);
    box-shadow: 0 15px 40px rgba(15, 76, 129, 0.08);
}

.who-number {
    text-align: center;
    font-size: 7rem;
    line-height: 0.8;
    font-weight: 900;
    color: var(--pa-teal);
}

.who-number span {
    display: block;
    margin-top: 1rem;
    font-size: 1.2rem;
    color: var(--pa-blue-dark);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.who-text {
    min-width: 0;
}

.who-text h3 {
    margin-top: 0;
    color: var(--pa-blue-dark);
    font-size: 1.6rem;
}

.every-move {
    margin-top: 1.5rem;
    padding: 1.5rem 2rem;
    background: #fffdf2;
    border-left: 5px solid var(--pa-gold);
    border-radius: 10px;
}

.every-move strong {
    color: #8a6417;
    font-size: 1.2rem;
}

.every-move p {
    margin-bottom: 0;
}

/* =========================================================
   EVIDENCE STATS
========================================================= */

.pa-stat-section {
    padding: 5rem 0;
    background: #ffffff;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.2rem;
    margin-top: 2.5rem;
}

.stat-card {
    min-width: 0;
    padding: 1.8rem;
    background: var(--pa-soft-blue);
    border: 1px solid var(--pa-border);
    border-radius: 18px;
}

.stat-number {
    display: block;
    margin-bottom: 0.4rem;
    color: var(--pa-teal);
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1;
    font-weight: 900;
}

.stat-card h3 {
    margin: 0.6rem 0;
    color: var(--pa-blue-dark);
    font-size: 1.05rem;
}

.stat-card p {
    margin: 0;
    color: var(--pa-muted);
    font-size: 0.93rem;
}

/* =========================================================
   PERSONAL HINTS
========================================================= */

.pa-personal {
    padding: 5rem 0;
    background: #f7fbfa;
}

.pa-hints {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.hint-card {
    min-width: 0;
    display: flex;
    gap: 1rem;
    padding: 1.3rem;
    background: white;
    border: 1px solid var(--pa-border);
    border-radius: 14px;
}

.hint-card span {
    flex: 0 0 42px;
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--pa-teal);
    color: white;
    font-weight: 800;
}

.hint-card p {
    margin: 0;
}

/* =========================================================
   PHYSIOLOGY
========================================================= */

.pa-physiology {
    padding: 5rem 0;
    background: var(--pa-soft-blue);
}

.physiology-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.4rem;
    margin-top: 2rem;
}

.physiology-card {
    min-width: 0;
    padding: 2rem;
    background: white;
    border-radius: 18px;
    border: 1px solid var(--pa-border);
    box-shadow: var(--pa-shadow);
}

.physiology-icon {
    width: 58px;
    height: 58px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    border-radius: 50%;
    background: var(--pa-soft-teal);
    color: var(--pa-teal);
    font-size: 1.4rem;
    font-weight: 900;
}

.physiology-card h3 {
    margin: 0 0 0.7rem;
    color: var(--pa-blue-dark);
}

/* =========================================================
   ADAPTATION / SAID
========================================================= */

.pa-fitness {
    padding: 5rem 0;
    background: #ffffff;
}

.adaptation-banner {
    margin: 2rem 0;
    padding: 2rem;
    background: var(--pa-blue-dark);
    color: white;
    border-radius: 20px;
}

.adaptation-banner h3 {
    margin-top: 0;
    color: #9de5d8;
    font-size: 1.5rem;
}

.adaptation-banner p {
    max-width: 850px;
}

.adaptation-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.3rem;
    margin-top: 1.5rem;
}

.adaptation-card {
    min-width: 0;
    padding: 1.7rem;
    border: 1px solid var(--pa-border);
    border-radius: 16px;
    background: var(--pa-light);
}

.adaptation-card h3 {
    margin-top: 0;
    color: var(--pa-blue-dark);
}

/* =========================================================
   FITNESS COMPONENTS
========================================================= */

.fitness-components {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.2rem;
    margin-top: 2rem;
}

.fitness-card {
    min-width: 0;
    padding: 1.7rem;
    background: white;
    border: 1px solid var(--pa-border);
    border-radius: 16px;
    border-top: 5px solid var(--pa-teal);
}

.fitness-card h3 {
    margin-top: 0;
    color: var(--pa-blue-dark);
}

/* =========================================================
   FITT
========================================================= */

.pa-fitt {
    padding: 5rem 0;
    background: var(--pa-light);
}

.fitt-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.fitt-card {
    min-width: 0;
    padding: 1.8rem;
    text-align: center;
    background: white;
    border: 1px solid var(--pa-border);
    border-radius: 18px;
}

.fitt-letter {
    display: block;
    color: var(--pa-teal);
    font-size: 3rem;
    line-height: 1;
    font-weight: 900;
}

.fitt-card h3 {
    margin: 0.7rem 0;
    color: var(--pa-blue-dark);
}

.fitt-note {
    margin-top: 2rem;
    padding: 1.4rem 1.7rem;
    background: #fffdf2;
    border-left: 5px solid var(--pa-gold);
    border-radius: 10px;
}

/* =========================================================
   TOPICS
========================================================= */

.topic-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.4rem;
    margin-top: 2rem;
}

.topic-card {
    min-width: 0;
    padding: 2rem;
    background: white;
    border: 1px solid var(--pa-border);
    border-radius: 18px;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.topic-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 14px 30px rgba(15, 76, 129, 0.09);
}

.topic-card > span {
    display: inline-block;
    margin-bottom: 0.8rem;
    color: var(--pa-teal);
    font-weight: 900;
}

.topic-card h3 {
    margin: 0 0 0.7rem;
    color: var(--pa-blue-dark);
}

/* =========================================================
   SPATIAL MOVEMENT
========================================================= */

.pa-spatial {
    padding: 5rem 0;
    background: var(--pa-blue-dark);
    color: white;
}

.pa-spatial .pa-section-label {
    color: #8ee0d1;
}

.pa-spatial h2 {
    color: white;
}

.circle-flow {
    display: grid;
    grid-template-columns:
        minmax(0, 1fr) auto
        minmax(0, 1fr) auto
        minmax(0, 1fr) auto
        minmax(0, 1fr) auto
        minmax(0, 1fr);
    align-items: stretch;
    gap: 0.7rem;
    margin-top: 3rem;
}

.circle-step {
    min-width: 0;
    min-height: 150px;
    padding: 1.3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 18px;
    background: rgba(255,255,255,0.07);
}

.circle-step strong {
    display: block;
    color: #8ee0d1;
    font-size: 0.9rem;
}

.circle-step span {
    margin-top: 0.6rem;
    color: #e8f4f4;
    font-size: 0.9rem;
}

.arrow {
    align-self: center;
    color: #8ee0d1;
    font-size: 1.8rem;
}

/* =========================================================
   INEQUALITY
========================================================= */

.pa-inequality {
    padding: 5rem 0;
    background: #ffffff;
}

.inequality-intro {
    max-width: 850px;
    color: var(--pa-muted);
}

.inequality-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.4rem;
    margin-top: 2rem;
}

.inequality-card {
    min-width: 0;
    padding: 2rem;
    background: var(--pa-soft-blue);
    border: 1px solid var(--pa-border);
    border-radius: 18px;
}

.inequality-card h3 {
    margin-top: 0;
    color: var(--pa-blue-dark);
}

.inequality-card .big-stat {
    display: block;
    margin: 0.7rem 0;
    color: var(--pa-teal);
    font-size: 2.2rem;
    line-height: 1;
    font-weight: 900;
}

.inequality-source {
    margin-top: 1rem;
    color: var(--pa-muted);
    font-size: 0.78rem;
}

/* =========================================================
   DATA LITERACY
========================================================= */

.pa-data {
    padding: 5rem 0;
    background: #f7fbfa;
}

.data-challenge {
    margin-top: 2rem;
    padding: 2.2rem;
    background: white;
    border: 1px solid var(--pa-border);
    border-radius: 20px;
    box-shadow: var(--pa-shadow);
}

.data-question-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.8rem 1.5rem;
    margin-top: 1.5rem;
}

.data-question {
    padding: 1rem 1.1rem;
    border-radius: 10px;
    background: var(--pa-light);
}

.data-question strong {
    color: var(--pa-teal);
}

/* =========================================================
   ACTIVE ENVIRONMENTS
========================================================= */

.pa-environment {
    padding: 5rem 0;
    background: var(--pa-blue-dark);
    color: white;
}

.pa-environment h2 {
    color: white;
}

.pa-environment .pa-section-label {
    color: #8ee0d1;
}

.environment-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.3rem;
    margin-top: 2rem;
}

.environment-card {
    min-width: 0;
    padding: 1.8rem;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 17px;
    background: rgba(255,255,255,0.07);
}

.environment-card h3 {
    margin-top: 0;
    color: #9de5d8;
}

.environment-card p {
    color: #e7f3f3;
}

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

.pa-sdh {
    padding: 5rem 0;
}

.sdh-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.sdh-card {
    min-width: 0;
    padding: 2rem;
    background: white;
    border-top: 5px solid var(--pa-teal);
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.05);
}

.sdh-card h3 {
    margin-top: 0;
    color: var(--pa-blue-dark);
}

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

.pa-sdgs {
    padding: 5rem 0;
    background: #f5f9fb;
}

.sdg-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.sdg-card {
    min-width: 0;
    min-height: 150px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
    background: white;
    border-radius: 15px;
    border: 1px solid #dbe5ec;
}

.sdg-card strong {
    display: block;
    color: var(--pa-blue);
    font-size: 1.4rem;
}

.sdg-card span {
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

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

.pa-reflect {
    padding: 5rem 0;
    background: #fffdf4;
}

.pa-reflect blockquote {
    max-width: 850px;
    margin: 2rem 0;
    padding: 2rem;
    border-left: 6px solid var(--pa-gold);
    color: var(--pa-blue-dark);
    font-size: clamp(1.4rem, 3vw, 2.2rem);
    font-weight: 700;
}

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

.pa-action {
    padding: 5rem 0;
    background: var(--pa-light);
}

.action-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.action-card {
    min-width: 0;
    padding: 2rem;
    background: white;
    border-radius: 18px;
    border: 1px solid var(--pa-border);
}

.action-card h3 {
    color: var(--pa-teal);
}

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

.pa-quiz {
    padding: 5rem 0;
    background: #f5f8fa;
}

.quiz-card {
    max-width: 850px;
    margin: 1.5rem auto;
    padding: 2rem;
    background: white;
    border: 1px solid var(--pa-border);
    border-radius: 18px;
}

.quiz-card label {
    display: block;
    margin: 0.8rem 0;
    padding: 0.7rem;
    border-radius: 8px;
    cursor: pointer;
}

.quiz-card label:hover {
    background: var(--pa-light);
}

.quiz-answer {
    margin-top: 1.5rem;
    padding: 1rem;
    background: #eef8f6;
    border-radius: 8px;
    color: var(--pa-blue-dark);
    font-size: 0.95rem;
}

/* =========================================================
   PRINCIPLE
========================================================= */

.pa-principle {
    padding: 5rem 0;
    text-align: center;
    background: var(--pa-blue-dark);
    color: white;
}

.pa-principle h2 {
    color: white;
}

.principle {
    max-width: 850px;
    margin: 2rem auto;
    color: #9de5d8;
    font-size: clamp(1.5rem, 3vw, 2.3rem);
    line-height: 1.35;
}

/* =========================================================
   LIFE COURSE
========================================================= */

.pa-lifecourse {
    padding: 1.7rem 0;
    text-align: center;
    background: #e8f5f2;
}

.pa-lifecourse p {
    margin: 0;
    color: var(--pa-blue-dark);
    font-size: 1rem;
    font-weight: 700;
}

/* =========================================================
   EVIDENCE
========================================================= */

.pa-evidence {
    padding: 4rem 0;
    background: #fafcfc;
}

.evidence-box {
    padding: 2rem;
    background: white;
    border: 1px solid var(--pa-border);
    border-radius: 15px;
}

.evidence-box p {
    margin: 0.8rem 0;
}

.evidence-note {
    color: var(--pa-muted);
    font-size: 0.9rem;
}

/* =========================================================
   UTILITY / OVERFLOW PROTECTION
========================================================= */

.physiology-card,
.adaptation-card,
.fitness-card,
.fitt-card,
.topic-card,
.circle-step,
.inequality-card,
.data-challenge,
.environment-card,
.sdh-card,
.sdg-card,
.action-card,
.quiz-card,
.stat-card {
    overflow-wrap: anywhere;
}

/* =========================================================
   RESPONSIVE — TABLET
========================================================= */

@media (max-width: 1050px) {

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

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

    .circle-flow {
        grid-template-columns:
            minmax(0, 1fr) auto
            minmax(0, 1fr);
    }

    .circle-flow .circle-step:nth-of-type(5),
    .circle-flow .circle-step:nth-of-type(6) {
        margin-top: 1rem;
    }

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

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

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

@media (max-width: 900px) {

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

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

    .circle-flow {
        display: flex;
        flex-direction: column;
    }

    .arrow {
        align-self: center;
        transform: rotate(90deg);
    }

    .circle-step {
        width: 100%;
    }

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

/* =========================================================
   RESPONSIVE — MOBILE
========================================================= */

@media (max-width: 700px) {

    .pa-container,
    .pa-hero-content {
        width: calc(100% - 28px);
    }

    .pa-hero {
        min-height: 55vh;
    }

    .pa-hero h1 {
        letter-spacing: -1px;
    }

    .pa-hints,
    .topic-grid,
    .action-grid,
    .stat-grid,
    .physiology-grid,
    .adaptation-grid,
    .fitness-components,
    .fitt-grid,
    .inequality-grid,
    .environment-grid,
    .sdh-grid,
    .sdg-grid,
    .data-question-grid {
        grid-template-columns: 1fr;
    }

    .who-number {
        font-size: 5rem;
    }

    .who-recommendation {
        padding: 2rem 1.4rem;
    }

    .pa-section,
    .pa-who-core,
    .pa-stat-section,
    .pa-personal,
    .pa-physiology,
    .pa-fitness,
    .pa-fitt,
    .pa-spatial,
    .pa-inequality,
    .pa-data,
    .pa-environment,
    .pa-sdh,
    .pa-sdgs,
    .pa-reflect,
    .pa-action,
    .pa-quiz,
    .pa-principle,
    .pa-evidence {
        padding: 3.5rem 0;
    }

    .physiology-card,
    .adaptation-card,
    .fitness-card,
    .fitt-card,
    .topic-card,
    .inequality-card,
    .environment-card,
    .sdh-card,
    .action-card,
    .quiz-card,
    .data-challenge {
        padding: 1.5rem;
    }

    .pa-reflect blockquote {
        padding: 1.4rem;
        font-size: 1.4rem;
    }
}