/* ========== Tokens ========== */
:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --tint: #eef5f2;
  --warm: #f5efe4;
  --ink: #1f2a2e;
  --ink-soft: #4a585d;
  --line: #e3e0d8;
  --primary: #1d6b63;
  --primary-dark: #134e48;
  --primary-tint: #dcece8;
  --placeholder-ink: #6b6152;
  --placeholder-line: #c9c0ae;
  --placeholder-bg: #fbf8f2;
  --figure-bg: #eef5f2;
  --arm: #e7cdb6;
  --highlight: #c96f1e;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(31, 42, 46, 0.07);
  --max: 1200px;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

/* ========== Base ========== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--sans); font-size: 1rem; line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-underline-offset: 3px; }
a:hover { color: var(--primary-dark); }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .5em; color: var(--ink); }
h1 { font-family: var(--serif); font-size: clamp(2rem, 4.4vw, 3.1rem); font-weight: 700; letter-spacing: -0.01em; }
h2 { font-family: var(--serif); font-size: clamp(1.5rem, 2.8vw, 2rem); font-weight: 700; }
h3 { font-size: 1.08rem; font-weight: 600; }
h4 { font-size: .82rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-soft); margin-top: 1em; }
p { margin: 0 0 1em; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding-inline: 20px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 100;
  background: var(--primary-dark); color: #fff; padding: 10px 16px; border-radius: 8px;
  text-decoration: none; font-weight: 600;
}
.skip-link:focus { top: 12px; color: #fff; }

:focus-visible { outline: 3px solid var(--highlight); outline-offset: 3px; border-radius: 4px; }

.eyebrow {
  font-family: var(--sans); font-size: .78rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  line-height: 1.4; color: var(--primary); margin-bottom: .6em;
}

/* ========== Buttons ========== */
.btn {
  display: inline-block; padding: .8em 1.4em; border-radius: 999px; font: inherit; font-weight: 600;
  text-decoration: none; border: 2px solid transparent; cursor: pointer; text-align: center;
  transition: background-color .15s ease, color .15s ease, border-color .15s ease;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-secondary { background: var(--surface); color: var(--primary-dark); border-color: var(--primary); }
.btn-secondary:hover { background: var(--primary-tint); }
.btn-small { padding: .5em 1.05em; font-size: .9rem; }
.btn-disabled {
  background: transparent; color: var(--placeholder-ink); border: 2px dashed var(--placeholder-line);
  cursor: not-allowed;
}

/* ========== Notice bar ========== */
.notice-bar { background: var(--warm); border-bottom: 1px solid var(--line); font-size: .88rem; color: var(--ink); }
.notice-bar .container { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px; padding-block: 8px; }
.notice-label {
  background: var(--primary-dark); color: #fff; font-weight: 600; font-size: .75rem;
  letter-spacing: .04em; text-transform: uppercase; padding: .2em .7em; border-radius: 999px;
}

/* ========== Header ========== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251, 250, 247, .95); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 66px; gap: 16px; }
.logo { font-family: var(--serif); font-size: 1.35rem; font-weight: 700; color: var(--ink); text-decoration: none; }
.logo span { color: var(--primary); }
.logo-light { color: #fff; }
.logo-light span { color: #9fd6cc; }

.primary-nav ul { list-style: none; display: flex; gap: 4px; margin: 0; padding: 0; }
.primary-nav a {
  display: block; padding: 8px 12px; border-radius: 8px; color: var(--ink);
  text-decoration: none; font-weight: 500; font-size: .95rem;
}
.primary-nav a:hover { background: var(--tint); color: var(--primary-dark); }
.primary-nav a[aria-current="page"] { color: var(--primary-dark); font-weight: 600; }

.nav-toggle { display: none; background: none; border: 0; padding: 10px; cursor: pointer; border-radius: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--ink); margin: 5px 0; transition: transform .25s, opacity .25s; }

/* ========== Hero ========== */
.hero { padding-block: 64px 72px; background: linear-gradient(180deg, var(--tint), var(--bg)); }
.hero-inner { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
.pill {
  display: inline-block; background: var(--surface); border: 1px solid var(--line); color: var(--ink-soft);
  font-size: .85rem; font-weight: 500; padding: .35em .9em; border-radius: 999px; margin-bottom: 18px;
}
.lead { font-size: 1.15rem; color: var(--ink); max-width: 38em; }
.lead-sub { color: var(--ink-soft); max-width: 38em; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }

.hero-figure { margin: 0; background: var(--surface); border: 1px solid var(--line); border-radius: 20px; padding: 18px; box-shadow: var(--shadow); }
.hero-figure img { width: 100%; height: auto; display: block; border-radius: 12px; }
.hero-figure figcaption { font-size: .88rem; color: var(--ink-soft); margin-top: 10px; text-align: center; }
.svg-label { font: 600 14px var(--sans); fill: var(--ink); }
.svg-small { font: 500 12px var(--sans); fill: var(--ink-soft); }

/* ========== Layout with sidebar ========== */
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 48px; align-items: start; padding-block: 16px 72px; }
.main-col { min-width: 0; }
/* Sidebar hidden: main content takes the full width (beats the media-query column rules) */
.layout.layout--no-sidebar { grid-template-columns: minmax(0, 1fr); }

.section { padding-block: 48px 8px; }
.section + .section { border-top: 1px solid var(--line); margin-top: 40px; }
.section-head { max-width: 46em; margin-bottom: 28px; }
.section-head p:last-child { color: var(--ink-soft); }

/* ========== Placeholders ========== */
.placeholder-tag {
  display: inline-block; font-size: .72rem; font-weight: 600; letter-spacing: .04em; text-transform: uppercase;
  color: var(--placeholder-ink); background: var(--placeholder-bg); border: 1px dashed var(--placeholder-line);
  padding: .15em .6em; border-radius: 6px;
}
.placeholder-text { color: var(--placeholder-ink); font-style: italic; }
.placeholder-box { border: 2px dashed var(--placeholder-line); background: var(--placeholder-bg); border-radius: var(--radius); padding: 18px 20px; }
.placeholder-box .placeholder-tag { margin-bottom: 8px; }
.placeholder-box p { margin: 0; color: var(--placeholder-ink); font-style: italic; }

/* ========== Article cards ========== */
.article-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.article-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 22px 20px; display: flex; flex-direction: column; gap: 4px;
}
.article-card > p { color: var(--ink-soft); flex-grow: 1; }
/* Odd number of Learn cards: stretch the last one across the full row */
#learn .article-grid > .article-card:last-child:nth-child(odd) { grid-column: 1 / -1; }
.read-more { font-weight: 600; align-self: flex-start; }
.article-card .placeholder-tag { align-self: flex-start; margin-top: 6px; }

/* ========== Option cards ========== */
.option-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.option-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; display: flex; flex-direction: column;
}
.option-card > p:first-of-type { color: var(--ink-soft); }
.option-card ul { margin: 0 0 14px; padding-left: 1.15em; font-size: .95rem; }
.option-card li { margin-bottom: 6px; }
.suitability {
  margin: auto 0 0; padding-top: 12px; border-top: 1px solid var(--line);
  font-size: .87rem; color: var(--primary-dark); font-weight: 500;
}

/* ========== Callout ========== */
.callout { background: var(--warm); border-left: 4px solid var(--highlight); border-radius: 10px; padding: 16px 20px; margin-bottom: 24px; }
.callout p { margin: 0; }

/* ========== Video cards ========== */
.video-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.video-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column; }
.video-card.placeholder { border: 2px dashed var(--placeholder-line); background: var(--placeholder-bg); }
.video-card img { aspect-ratio: 16 / 9; object-fit: cover; width: 100%; }
.video-thumb { position: relative; display: block; }
.video-play {
  width: 100%; padding: 0; border: 0; margin: 0; background: #111; cursor: pointer;
  font: inherit; color: inherit;
}
.video-play:focus-visible { outline-offset: -4px; border-radius: 0; }
.play-icon {
  position: absolute; left: 50%; top: 50%; width: 68px; height: 48px; transform: translate(-50%, -50%);
  background: rgba(20, 28, 30, .8); border-radius: 14px; transition: background-color .15s ease;
}
.play-icon::after {
  content: ""; position: absolute; left: 27px; top: 13px;
  border-left: 20px solid #fff; border-top: 11px solid transparent; border-bottom: 11px solid transparent;
}
.video-play:hover .play-icon, .video-play:focus-visible .play-icon { background: #c4302b; }
.video-badge {
  position: absolute; left: 10px; bottom: 10px; background: rgba(20, 28, 30, .82); color: #fff;
  font-size: .75rem; font-weight: 600; padding: .25em .7em; border-radius: 6px;
}
.video-frame { display: block; width: 100%; aspect-ratio: 16 / 9; border: 0; background: #111; }
.thumb-placeholder {
  aspect-ratio: 16 / 9; background: repeating-linear-gradient(45deg, #f1ece2, #f1ece2 12px, #ece6da 12px, #ece6da 24px);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px;
  color: var(--placeholder-ink); font-size: .85rem; font-weight: 500;
}
.thumb-placeholder .play {
  width: 46px; height: 46px; border-radius: 50%; background: rgba(255, 255, 255, .8); position: relative;
}
.thumb-placeholder .play::after {
  content: ""; position: absolute; left: 18px; top: 14px;
  border-left: 14px solid var(--placeholder-ink); border-top: 9px solid transparent; border-bottom: 9px solid transparent;
}
.video-body { padding: 16px 18px 18px; display: flex; flex-direction: column; align-items: flex-start; gap: 6px; flex-grow: 1; }
.video-body h3 { margin: 4px 0 0; }
.video-body p { margin: 0; color: var(--ink-soft); font-size: .93rem; }
.video-body .video-creator { font-weight: 600; color: var(--ink); }
.video-body .btn { margin-top: auto; }
.video-body p:last-of-type { margin-bottom: 10px; }

/* ========== FAQ accordion ========== */
.faq { display: grid; gap: 10px; }
.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; }
.faq details[open] { box-shadow: var(--shadow); }
.faq summary {
  cursor: pointer; list-style: none; position: relative;
  padding: 16px 52px 16px 20px; font-weight: 600; border-radius: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 22px; top: 50%; width: 10px; height: 10px;
  border-right: 2px solid var(--primary); border-bottom: 2px solid var(--primary);
  transform: translateY(-70%) rotate(45deg); transition: transform .2s ease;
}
.faq details[open] summary::after { transform: translateY(-30%) rotate(-135deg); }
.faq summary:hover { color: var(--primary-dark); }
.faq-answer { padding: 0 20px 16px; color: var(--ink-soft); }
.faq-answer p:last-child, .faq-answer ul:last-child { margin-bottom: 0; }
.faq-answer ul { padding-left: 1.2em; }
.edu-note {
  margin-top: 20px; padding: 14px 18px; background: var(--tint); border-radius: 10px;
  font-size: .93rem; color: var(--primary-dark); font-weight: 500;
}

/* ========== Sidebar ========== */
.sidebar { padding-top: 48px; }
.sidebar-inner { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.sidebar h2 { font-size: 1.3rem; }
.sidebar-intro { font-size: .9rem; color: var(--ink-soft); }
.resource-card {
  border: 2px dashed var(--placeholder-line); background: var(--placeholder-bg); border-radius: 10px;
  padding: 14px 16px; margin-bottom: 12px; font-size: .9rem;
}
.resource-card p { margin: 0 0 4px; }
.resource-card p:last-child { margin: 0; }
.resource-label { font-weight: 600; color: var(--placeholder-ink); }
.resource-reserved { padding: 12px 0; border-bottom: 1px solid var(--line); margin-bottom: 16px; font-size: .92rem; }
.resource-reserved p { margin: 0; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.link-reserved { font-weight: 600; color: var(--ink-soft); text-decoration: underline dashed var(--placeholder-line); text-underline-offset: 4px; }
.sidebar-care h3 { font-size: 1rem; margin-bottom: 4px; }
.sidebar-care p { font-size: .92rem; margin: 0; color: var(--ink-soft); }

/* ========== Footer ========== */
.site-footer { background: #1d2a2c; color: #d6dedd; padding-block: 48px 28px; }
.footer-top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px 32px; padding-bottom: 20px; border-bottom: 1px solid #34474a; }
.footer-links { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 22px; }
.footer-links a { color: #d6dedd; text-decoration: none; font-size: .93rem; }
.footer-links a:hover { color: #fff; text-decoration: underline; }
.footer-placeholder-note { width: 100%; margin: 0; font-size: .8rem; color: #a9b8b6; }
.footer-notices { padding-block: 20px; font-size: .9rem; max-width: 60em; }
.footer-notices strong { color: #fff; }
.copyright { font-size: .82rem; color: #a9b8b6; margin: 0; }

/* ========== Article pages (/learn) ========== */
.article-wrap { max-width: 800px; padding-block: 0 48px; }
.breadcrumb { font-size: .88rem; color: var(--ink-soft); padding-top: 24px; }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; }
.breadcrumb li + li::before { content: "/"; margin-right: 6px; color: var(--placeholder-line); }
.breadcrumb a { color: var(--ink-soft); }
.breadcrumb a:hover { color: var(--primary-dark); }

.article-header { padding: 24px 0 4px; }
.article-header h1 { font-size: clamp(1.8rem, 3.8vw, 2.6rem); }
.article-meta { display: flex; flex-wrap: wrap; gap: 4px 16px; color: var(--ink-soft); font-size: .9rem; margin-bottom: 18px; }
.article-intro { font-size: 1.12rem; }

.article-body { font-size: 1.04rem; }
.article-body h2 { margin-top: 1.8em; }
.article-body h3 { font-size: 1.15rem; margin-top: 1.4em; }
.article-body ul, .article-body ol { padding-left: 1.3em; margin: 0 0 1.2em; }
.article-body li { margin-bottom: .45em; }

.table-wrap { overflow-x: auto; margin: 0 0 1.4em; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.article-body table { width: 100%; border-collapse: collapse; font-size: .95rem; }
.article-body th, .article-body td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.article-body th { background: var(--tint); font-weight: 600; }
.article-body tr:last-child td { border-bottom: 0; }

.toc { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 24px; margin: 20px 0; }
.article-body .toc h2 {
  font-family: var(--sans); font-size: .82rem; text-transform: uppercase; letter-spacing: .08em;
  color: var(--primary); margin: 0 0 8px;
}
.toc ol { margin: 0; }
.toc li { margin-bottom: 4px; font-size: .97rem; }

.takeaways { background: var(--tint); border-left: 4px solid var(--primary); border-radius: 10px; padding: 18px 22px; margin: 24px 0; }
.article-body .takeaways h2 { font-size: 1.1rem; margin: 0 0 8px; }
.takeaways ul { margin: 0; }

.article-body .callout { margin: 24px 0; }
.callout-warning { background: #fbecea; border-left-color: #b42318; }

.exercise { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 4px 22px 8px; margin: 18px 0; }
.exercise h3 { margin-top: 1em; }
.dose {
  display: inline-block; background: var(--primary-tint); color: var(--primary-dark);
  font-weight: 600; font-size: .85rem; padding: .25em .8em; border-radius: 999px; margin-bottom: 10px;
}

.faq details > p { padding: 0 20px 16px; margin: 0; color: var(--ink-soft); }
.back-link { margin-top: 20px; font-weight: 600; }

.related { background: var(--tint); padding-block: 48px; border-top: 1px solid var(--line); }
.related h2 { margin-bottom: 24px; }
.related .article-card { background: var(--surface); }

/* ========== Responsive ========== */
@media (max-width: 1080px) {
  .layout { grid-template-columns: minmax(0, 1fr) 260px; gap: 32px; }
}

@media (max-width: 920px) {
  .layout { grid-template-columns: 1fr; padding-bottom: 56px; }
  .sidebar { padding-top: 24px; }
  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero-figure { max-width: 480px; }

  .nav-toggle { display: block; }
  .primary-nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--surface); border-bottom: 1px solid var(--line); box-shadow: var(--shadow);
  }
  .primary-nav.open { display: block; }
  .primary-nav ul { flex-direction: column; padding: 8px 20px 16px; }
  .primary-nav a { padding: 12px 8px; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

@media (max-width: 680px) {
  .hero { padding-block: 40px 48px; }
  .article-grid, .option-list, .video-grid { grid-template-columns: 1fr; }
  .section { padding-block: 36px 4px; }
  .section + .section { margin-top: 28px; }
  .hero-cta .btn { flex: 1 1 100%; }
  .article-body { font-size: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}