/* ═══════════════════════════════════════════
   WELLNESS LAB UK — NuLeaf-Inspired Design
   Premium, clean, nature-forward aesthetic
   ═══════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Instrument+Sans:wght@400;500;600;700&display=swap');

:root {
    --green: #025f1d;
    --green-light: #038a2a;
    --green-pale: #e8f5ec;
    --green-dark: #01410f;

    --text: #1d1d1f;
    --text-secondary: #555;
    --text-light: #888;
    --text-inverse: #fff;

    --bg: #ffffff;
    --bg-soft: #f7f7f7;
    --bg-warm: #f2f0eb;
    --bg-dark: #111;

    --border: #e5e5e5;
    --border-light: #f0f0f0;

    --radius: 20px;
    --radius-sm: 12px;
    --radius-pill: 30px;
    --shadow: 0 0 30px rgba(0,0,0,0.08);
    --shadow-hover: 0 0 40px rgba(0,0,0,0.14);

    --font: 'Instrument Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --max-width: 1400px;
    --content-width: 760px;

    --sp-1: 0.25rem;
    --sp-2: 0.5rem;
    --sp-3: 1rem;
    --sp-4: 1.5rem;
    --sp-5: 2rem;
    --sp-6: 3rem;
    --sp-7: 4rem;
    --sp-8: 6rem;
    --sp-9: 8rem;
}

/* ── Reset ──────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font);
    color: var(--text);
    background: var(--bg);
    line-height: 1.625;
    font-weight: 400;
}

a {
    color: var(--green);
    text-decoration: none;
    transition: color 0.3s ease;
}
a:hover { color: var(--green-light); }

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

/* ── Utility ────────────────────────────── */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 clamp(1.25rem, 4vw, 3rem);
}

/* ── Announcement Bar ───────────────────── */
.announcement-bar {
    background: var(--green);
    color: var(--text-inverse);
    text-align: center;
    padding: 0.6rem var(--sp-3);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.02em;
}

.announcement-bar a {
    color: var(--text-inverse);
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* ── Header ─────────────────────────────── */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-light);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 clamp(1.25rem, 4vw, 3rem);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    color: var(--text);
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: -0.02em;
    flex-shrink: 0;
}

.logo-wordmark {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.025em;
    color: var(--text);
}

.logo-wordmark span {
    color: var(--green);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: var(--sp-5);
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding: var(--sp-2) 0;
    position: relative;
    transition: color 0.3s ease;
}

.nav-link:hover,
.nav-link.active { color: var(--text); }

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--green);
    border-radius: 1px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--sp-2);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: 0.3s ease;
}

.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ── Buttons ────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font);
    font-size: 0.95rem;
    font-weight: 600;
    padding: 0.9rem 2rem;
    border-radius: var(--radius-pill);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    letter-spacing: -0.01em;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--green);
    color: var(--text-inverse);
    border-color: var(--green);
}
.btn-primary:hover {
    background: var(--green-light);
    border-color: var(--green-light);
    color: var(--text-inverse);
}

.btn-secondary {
    background: transparent;
    color: var(--text);
    border-color: var(--border);
}
.btn-secondary:hover {
    border-color: var(--text);
    color: var(--text);
}

.btn-white {
    background: var(--bg);
    color: var(--green);
    border-color: var(--bg);
}
.btn-white:hover {
    background: transparent;
    color: var(--text-inverse);
    border-color: var(--text-inverse);
}

.btn-outline-white {
    background: transparent;
    color: var(--text-inverse);
    border-color: rgba(255,255,255,0.4);
}
.btn-outline-white:hover {
    border-color: var(--text-inverse);
    color: var(--text-inverse);
}

.btn-lg {
    padding: 1.1rem 2.5rem;
    font-size: 1.05rem;
}

/* ── Hero ───────────────────────────────── */
.hero {
    position: relative;
    overflow: hidden;
    min-height: 90vh;
    display: flex;
    align-items: center;
    background: var(--bg-dark);
    color: var(--text-inverse);
}

.hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        160deg,
        rgba(1, 65, 15, 0.75) 0%,
        rgba(0, 0, 0, 0.55) 50%,
        rgba(0, 0, 0, 0.7) 100%
    );
    z-index: 1;
}

.hero-inner {
    position: relative;
    z-index: 2;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--sp-9) clamp(1.25rem, 4vw, 3rem);
    width: 100%;
}

.hero-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.7);
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.15);
    padding: 0.5rem 1.2rem;
    border-radius: var(--radius-pill);
    margin-bottom: var(--sp-6);
}

.hero-title {
    font-size: clamp(2.8rem, 6vw, 5rem);
    font-weight: 700;
    line-height: 1.08;
    letter-spacing: -0.03em;
    margin-bottom: var(--sp-5);
    max-width: 750px;
}

.hero-title .accent {
    color: #8fd4a0;
}

.hero-subtitle {
    font-size: clamp(1.05rem, 1.8vw, 1.25rem);
    font-weight: 400;
    line-height: 1.65;
    color: rgba(255,255,255,0.75);
    max-width: 520px;
    margin-bottom: var(--sp-7);
}

.hero-actions {
    display: flex;
    gap: var(--sp-3);
    flex-wrap: wrap;
}

/* ── Trust Strip ────────────────────────── */
.trust-strip {
    background: var(--bg-soft);
    border-bottom: 1px solid var(--border-light);
    padding: var(--sp-6) 0;
}

.trust-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--sp-7);
    flex-wrap: wrap;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
}

.trust-icon {
    width: 48px;
    height: 48px;
    background: var(--green-pale);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.trust-text strong {
    display: block;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text);
    letter-spacing: -0.01em;
}

.trust-text span {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* ── Sections ───────────────────────────── */
.section {
    padding: var(--sp-9) 0;
}

.section-soft {
    background: var(--bg-soft);
}

.section-header {
    text-align: center;
    margin-bottom: var(--sp-7);
}

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--green);
    margin-bottom: var(--sp-3);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.15;
    margin-bottom: var(--sp-3);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.65;
}

.section-footer {
    text-align: center;
    margin-top: var(--sp-7);
}

/* ── Article Cards ──────────────────────── */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: var(--sp-5);
}

.card {
    background: var(--bg);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px);
}

.card-image {
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.card:hover .card-image img {
    transform: scale(1.05);
}

.card-body {
    padding: var(--sp-5);
}

.card-label {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--green);
    background: var(--green-pale);
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius-pill);
    margin-bottom: var(--sp-3);
}

.card-title {
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.3;
    margin-bottom: var(--sp-2);
}

.card-title a {
    color: var(--text);
    transition: color 0.3s ease;
}
.card-title a:hover { color: var(--green); }

.card-excerpt {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--sp-4);
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--sp-3);
    border-top: 1px solid var(--border-light);
}

.card-date {
    font-size: 0.8rem;
    color: var(--text-light);
    font-weight: 500;
}

.card-arrow {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--green);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.card:hover .card-arrow {
    background: var(--green);
    color: var(--text-inverse);
}

/* ── Feature Blocks ─────────────────────── */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--sp-5);
}

.feature-block {
    text-align: center;
    padding: var(--sp-7) var(--sp-5);
    background: var(--bg);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: box-shadow 0.3s ease;
}

.feature-block:hover {
    box-shadow: var(--shadow);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--sp-4);
    background: var(--green-pale);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
}

.feature-title {
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: var(--sp-2);
}

.feature-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ── CTA Banner ─────────────────────────── */
.cta-banner {
    background: var(--green);
    color: var(--text-inverse);
    border-radius: var(--radius);
    padding: var(--sp-8) var(--sp-7);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255,255,255,0.06) 0%, transparent 70%);
    pointer-events: none;
}

.cta-title {
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: var(--sp-3);
    position: relative;
}

.cta-text {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.8);
    max-width: 500px;
    margin: 0 auto var(--sp-6);
    line-height: 1.65;
    position: relative;
}

/* ── Page Header ────────────────────────── */
.page-header {
    background: var(--bg-soft);
    padding: var(--sp-8) 0 var(--sp-7);
    text-align: center;
    border-bottom: 1px solid var(--border-light);
}

.page-header h1 {
    font-size: clamp(2.2rem, 4.5vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: var(--sp-3);
}

.page-header p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.65;
}

/* ── Category Page ──────────────────────── */
.category-content {
    padding: var(--sp-8) 0;
}

.empty-state {
    text-align: center;
    padding: var(--sp-8) 0;
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* ── Article Page ───────────────────────── */
.article-header--hero {
    position: relative;
    overflow: hidden;
    min-height: 55vh;
    display: flex;
    align-items: flex-end;
    background: var(--bg-dark);
    color: var(--text-inverse);
    padding: var(--sp-8) 0 var(--sp-6);
}

.article-header__bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
}

.article-header__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.85) 0%,
        rgba(0, 0, 0, 0.5) 40%,
        rgba(1, 65, 15, 0.3) 100%
    );
    z-index: 1;
}

.article-header-inner {
    position: relative;
    z-index: 2;
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 clamp(1.25rem, 4vw, 3rem);
}

.article-breadcrumb {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: rgba(255,255,255,0.6);
    margin-bottom: var(--sp-5);
}

.article-breadcrumb:hover { color: var(--text-inverse); }

.article-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.15;
    margin-bottom: var(--sp-4);
    color: var(--text-inverse);
}

.article-excerpt {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.75);
    line-height: 1.65;
    margin-bottom: var(--sp-5);
    max-width: 600px;
}

.article-meta-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--sp-4);
    border-top: 1px solid rgba(255,255,255,0.15);
    flex-wrap: wrap;
    gap: var(--sp-3);
}

.author-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-inverse);
}

.author-cred {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.5);
    margin-left: var(--sp-2);
    font-weight: 500;
}

.meta-dates {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.45);
    display: flex;
    gap: var(--sp-3);
    font-weight: 500;
}

/* ── Reading Time ───────────────────────── */
.reading-time {
    color: rgba(255,255,255,0.45);
    font-weight: 500;
}

/* ── Article Layout (TOC + Content) ─────── */
.article-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: var(--sp-7);
    max-width: calc(var(--content-width) + 240px + 4rem);
    margin: 0 auto;
    padding: 0 clamp(1.25rem, 4vw, 3rem);
}

/* ── TOC Sidebar (Desktop) ──────────────── */
.toc-sidebar {
    position: relative;
}

.toc-nav {
    position: sticky;
    top: 100px;
    padding: var(--sp-5) 0;
}

.toc-heading {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-light);
    margin-bottom: var(--sp-4);
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-list li {
    margin-bottom: 0;
}

.toc-list a {
    display: block;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-light);
    padding: 0.4rem 0 0.4rem var(--sp-3);
    border-left: 2px solid var(--border-light);
    transition: all 0.2s ease;
    line-height: 1.4;
}

.toc-list a:hover {
    color: var(--text);
    border-left-color: var(--border);
}

.toc-list a.active {
    color: var(--green);
    border-left-color: var(--green);
    font-weight: 600;
}

/* ── TOC Mobile ─────────────────────────── */
.toc-mobile {
    display: none;
    border-bottom: 1px solid var(--border-light);
    background: var(--bg);
}

.toc-mobile-toggle {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: var(--sp-3) clamp(1.25rem, 4vw, 3rem);
    background: none;
    border: none;
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
}

.toc-chevron {
    font-size: 0.7rem;
    transition: transform 0.3s ease;
}

.toc-mobile-toggle.open .toc-chevron {
    transform: rotate(180deg);
}

.toc-mobile-nav {
    display: none;
    padding: 0 clamp(1.25rem, 4vw, 3rem) var(--sp-4);
}

.toc-mobile-nav.open {
    display: block;
}

.toc-mobile-nav a {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 0.4rem 0;
    border-bottom: 1px solid var(--border-light);
}

.toc-mobile-nav a:last-child { border-bottom: none; }
.toc-mobile-nav a:hover { color: var(--green); }

/* ── Article Body ───────────────────────── */
.article-body {
    padding: var(--sp-7) 0;
    min-width: 0;
}

.article-body-inner {
    max-width: var(--content-width);
}

/* Section dividers between h2s */
.article-body-inner h2 {
    font-size: 1.7rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: var(--sp-8) 0 var(--sp-4);
    padding-top: var(--sp-7);
    border-top: 1px solid var(--border-light);
    scroll-margin-top: 90px;
}

.article-body-inner h2:first-of-type {
    border-top: none;
    padding-top: 0;
    margin-top: 0;
}

.article-body-inner h3 {
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin: var(--sp-6) 0 var(--sp-3);
    scroll-margin-top: 90px;
}

.article-body-inner p {
    margin-bottom: var(--sp-4);
    font-size: 1.05rem;
    line-height: 1.8;
}

.article-body-inner ul, .article-body-inner ol {
    margin: var(--sp-4) 0 var(--sp-4) var(--sp-5);
}

.article-body-inner li {
    margin-bottom: var(--sp-2);
    line-height: 1.7;
    font-size: 1.05rem;
}

/* Callout boxes (blockquotes) — key findings */
.article-body-inner blockquote {
    border-left: 4px solid #1A5C3A;
    padding: var(--sp-5) var(--sp-5);
    margin: var(--sp-6) 0;
    background: #f0f8f3;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: normal;
}

.article-body-inner blockquote p {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--text);
    font-weight: 500;
    margin-bottom: 0;
}

.article-body-inner blockquote p + p {
    margin-top: var(--sp-3);
}

/* Pull quotes */
.article-body-inner .pull-quote,
.article-body-inner blockquote.pull-quote {
    border-left: 4px solid var(--green);
    background: none;
    padding: var(--sp-5) 0 var(--sp-5) var(--sp-6);
    margin: var(--sp-7) 0;
}

.article-body-inner .pull-quote p {
    font-size: 1.35rem;
    font-weight: 600;
    line-height: 1.5;
    color: var(--green-dark);
    letter-spacing: -0.015em;
}

/* Checklist-style blocks (bold lead-in + text) */
.article-body-inner p > strong:first-child {
    display: block;
    font-size: 1rem;
    color: var(--text);
    margin-bottom: 0.3rem;
}

.article-body-inner .checklist-block {
    background: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--sp-4) var(--sp-5);
    margin-bottom: var(--sp-4);
}

.article-body-inner .checklist-block p {
    margin-bottom: 0;
}

/* Images in articles */
.article-body-inner img {
    width: 100%;
    border-radius: var(--radius-sm);
    margin: var(--sp-5) 0;
}

.article-body-inner .caption,
.article-body-inner img + em {
    display: block;
    font-size: 0.85rem;
    color: var(--text-light);
    text-align: center;
    margin-top: calc(-1 * var(--sp-3));
    margin-bottom: var(--sp-5);
    font-style: normal;
}

.article-body-inner table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--sp-6) 0;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.article-body-inner th, .article-body-inner td {
    padding: var(--sp-3) var(--sp-4);
    border: 1px solid var(--border);
    text-align: left;
}

.article-body-inner th {
    background: var(--bg-soft);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.disclosure-box {
    background: var(--bg-soft);
    border-radius: var(--radius-sm);
    padding: var(--sp-4) var(--sp-5);
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--sp-6);
    line-height: 1.6;
}

/* ── References ─────────────────────────── */
.article-references {
    background: var(--bg-soft);
    padding: var(--sp-7) 0;
}

.article-references-inner {
    max-width: calc(var(--content-width) + 240px + 4rem);
    margin: 0 auto;
    padding: 0 clamp(1.25rem, 4vw, 3rem);
}

.article-references h3 {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-light);
    margin-bottom: var(--sp-4);
}

.reference-list {
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding-left: var(--sp-5);
}

.reference-list li { margin-bottom: var(--sp-2); }

/* ── About Page ─────────────────────────── */
.about-body {
    padding: var(--sp-8) 0;
}

.about-layout {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: var(--sp-8);
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 clamp(1.25rem, 4vw, 3rem);
}

.about-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: var(--sp-7) 0 var(--sp-3);
}

.about-content h2:first-child { margin-top: 0; }

.about-content p {
    margin-bottom: var(--sp-4);
    line-height: 1.8;
    font-size: 1.05rem;
}

/* ── Credentials Card ───────────────────── */
.credentials-card {
    background: var(--bg-soft);
    border-radius: var(--radius);
    padding: var(--sp-5);
    position: sticky;
    top: 92px;
}

.credentials-card h3 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-light);
    margin-bottom: var(--sp-4);
}

.credential-item {
    display: flex;
    gap: var(--sp-3);
    padding: var(--sp-4) 0;
    border-top: 1px solid var(--border);
}

.credential-badge {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--green);
    background: var(--green-pale);
    padding: 0.35em 0.75em;
    border-radius: var(--radius-pill);
    height: fit-content;
    white-space: nowrap;
}

.credential-item strong {
    display: block;
    font-size: 0.95rem;
    margin-bottom: 0.15em;
}

.credential-item p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
}

/* ── Methodology ────────────────────────── */
.methodology-body {
    padding: var(--sp-8) 0;
}

.methodology-body .container {
    max-width: var(--content-width);
}

.method-step {
    display: flex;
    gap: var(--sp-6);
    padding: var(--sp-6) 0;
    border-bottom: 1px solid var(--border-light);
}

.step-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--green-pale);
    line-height: 1;
    min-width: 70px;
    letter-spacing: -0.03em;
}

.step-content h2 {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin-bottom: var(--sp-3);
}

.step-content p {
    margin-bottom: var(--sp-3);
    line-height: 1.75;
    font-size: 1rem;
    color: var(--text-secondary);
}

.method-disclosure {
    margin-top: var(--sp-7);
    padding: var(--sp-6);
    background: var(--bg-soft);
    border-radius: var(--radius);
}

.method-disclosure h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: var(--sp-3);
}

.method-disclosure p {
    margin-bottom: var(--sp-3);
    line-height: 1.75;
    color: var(--text-secondary);
}

/* ── 404 Page ───────────────────────────── */
.error-page {
    text-align: center;
    padding: var(--sp-9) 0;
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.error-page h1 {
    font-size: 8rem;
    font-weight: 700;
    letter-spacing: -0.05em;
    color: var(--border);
    line-height: 1;
    margin-bottom: var(--sp-3);
}

.error-page p {
    color: var(--text-secondary);
    margin-bottom: var(--sp-6);
    font-size: 1.1rem;
}

/* ── Footer ─────────────────────────────── */
.site-footer {
    background: var(--bg-dark);
    color: rgba(255,255,255,0.7);
    padding: var(--sp-8) 0 var(--sp-6);
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 clamp(1.25rem, 4vw, 3rem);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
    gap: var(--sp-7);
    padding-bottom: var(--sp-7);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: var(--sp-4);
}

.footer-logo .logo-icon {
    width: 32px;
    height: 32px;
    font-size: 0.75rem;
}

.footer-logo .logo-wordmark {
    font-size: 1.1rem;
    color: var(--text-inverse);
}

.footer-desc {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.5);
    line-height: 1.6;
}

.footer-heading {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(255,255,255,0.35);
    margin-bottom: var(--sp-4);
}

.footer-col a {
    display: block;
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
    padding: var(--sp-1) 0;
    transition: color 0.3s ease;
}

.footer-col a:hover { color: var(--text-inverse); }

.footer-small {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.4);
    line-height: 1.6;
}

.footer-bottom {
    padding-top: var(--sp-6);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--sp-3);
    font-size: 0.8rem;
    color: rgba(255,255,255,0.35);
}

/* ── Mobile ─────────────────────────────── */
@media (max-width: 768px) {
    .nav-toggle { display: flex; }

    .main-nav {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--bg);
        flex-direction: column;
        padding: var(--sp-3) clamp(1.25rem, 4vw, 3rem) var(--sp-5);
        border-bottom: 1px solid var(--border);
        gap: 0;
        box-shadow: 0 20px 40px rgba(0,0,0,0.08);
    }

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

    .nav-link {
        padding: var(--sp-3) 0;
        border-bottom: 1px solid var(--border-light);
        font-size: 1rem;
    }
    .nav-link.active::after { display: none; }

    .hero { min-height: 80vh; }
    .hero-title { font-size: clamp(2.2rem, 8vw, 3rem); }

    .trust-grid { gap: var(--sp-5); }

    .card-grid { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr; }

    .footer-grid { grid-template-columns: 1fr; gap: var(--sp-5); }
    .footer-bottom { flex-direction: column; text-align: center; }

    .about-layout { grid-template-columns: 1fr; }

    .method-step { flex-direction: column; gap: var(--sp-3); }

    .article-meta-bar { flex-direction: column; align-items: flex-start; }

    .article-layout { grid-template-columns: 1fr; }
    .toc-sidebar { display: none; }
    .toc-mobile { display: block; }

    .cta-banner { padding: var(--sp-7) var(--sp-5); }
}

@media (max-width: 480px) {
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; }
    .trust-grid { flex-direction: column; align-items: flex-start; padding: 0 var(--sp-3); }
}