:root {
  color-scheme: light;
  --bg: #f5f3ed;
  --panel: #fff;
  --ink: #242a24;
  --muted: #5d665f;
  --line: #dcd9cf;
  --gold: #755a12;
  --content-width: 880px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.8 -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
}
a { color: var(--gold); }
a:focus-visible { outline: 2px solid var(--gold); outline-offset: 4px; }
html { scroll-behavior: smooth; }
header, footer {
  border-color: var(--line);
  border-style: solid;
  padding: 16px max(20px, calc((100% - var(--content-width)) / 2));
}
header {
  border-width: 0 0 1px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
header nav, .footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
}
header nav a { font-weight: 650; text-decoration: none; }
footer { border-width: 1px 0 0; color: var(--muted); font-size: 13px; }
footer a { text-underline-offset: 3px; }
.brand { color: var(--gold); font-weight: 800; letter-spacing: .06em; text-decoration: none; }
main { width: min(var(--content-width), 100%); margin: 0 auto; padding: 44px 20px 64px; }
h1 { margin: 6px 0 12px; font-size: clamp(34px, 7vw, 54px); line-height: 1.2; letter-spacing: -.03em; }
h2 { font-size: 22px; line-height: 1.45; }
.hero { padding: 16px 0 28px; }
.eyebrow { color: var(--gold); font-size: 12px; font-weight: 700; letter-spacing: .16em; }
.intro { max-width: 700px; color: var(--muted); font-size: 18px; }
.breadcrumb { margin: 0 0 18px; color: var(--muted); font-size: 14px; }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; }
.breadcrumb li + li::before { content: "/"; margin-right: 8px; color: var(--muted); }
.blog-page, .article-page { --content-width: 1160px; }
.content-main { width: min(1160px, 100%); margin: 0 auto; padding: 36px 20px 64px; }
.content-layout { display: grid; grid-template-columns: minmax(0, 1fr) 270px; align-items: start; gap: 26px; }
.content-primary { min-width: 0; }
.footer-youtube { margin: 0 0 14px; }
.youtube-brand { display: inline-block; line-height: 0; }
.youtube-brand:focus-visible { outline: 2px solid var(--gold); outline-offset: 4px; }
.youtube-logo-window { display: block; position: relative; width: 190px; height: 58px; overflow: hidden; border-radius: 8px; background: #fff; }
.youtube-logo-window img { position: absolute; top: -30px; left: -21px; width: 230px; max-width: none; height: auto; }
.footer-links { gap: 8px 20px; }
.footer-note { margin: 14px 0 0; }

.home-page section {
  margin-top: 30px;
  padding: 22px clamp(18px, 4vw, 30px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
}
.home-page section h2 { margin: 0 0 10px; }
.home-page section p { margin: 8px 0; }
.links, .cards, .article-list { display: grid; gap: 14px; }
.links { display: flex; flex-wrap: wrap; gap: 12px 22px; margin-top: 32px; align-items: center; }
.links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  font-weight: 600;
  text-decoration: none;
  transition: background-color .18s ease, border-color .18s ease;
}
.links a:hover { background: #f1ead5; border-color: var(--gold); }
.card, .article-card, .article-body {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
}
.card { padding: 18px 20px; }
.card h3 { margin: 0; font-size: 18px; line-height: 1.5; }
.card p { margin: 8px 0 0; color: var(--muted); }
.card-meta, .article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 5px 14px; color: var(--muted); font-size: 13px; }
.card-meta { margin-bottom: 8px; }
.category { margin: 0; color: var(--gold); font-size: 13px; font-weight: 700; }
.card.featured, .article-card.featured { padding: 24px clamp(20px, 4vw, 34px); border-color: #c7ac5b; }
.card.featured h3, .article-card.featured h2 { font-size: clamp(21px, 4vw, 28px); }
.read-more { display: inline-block; margin-top: 12px; font-weight: 700; text-underline-offset: 4px; }
.empty { color: var(--muted); }

.blog-intro { max-width: 700px; margin: 0 0 26px; color: var(--muted); }
.blog-page section { margin-top: 26px; }
.feed-heading { margin: 0 0 14px; padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.article-card { padding: 20px 22px; }
.article-card h2 { margin: 2px 0 8px; font-size: 21px; }
.article-card h2 a { text-decoration: none; text-underline-offset: 4px; }
.article-card h2 a:hover { text-decoration: underline; }
.article-card p { margin: 8px 0; color: var(--muted); }
.article-card time { color: var(--muted); font-size: 13px; }
.article-body { padding: clamp(22px, 5vw, 44px); }
.article-body h1 { margin: 0 0 12px; }
.article-body h2 { margin: 0 0 10px; }
.article-body section { margin-top: 32px; scroll-margin-top: 20px; }
.article-body strong { color: #233e31; font-weight: 800; }
.article-body .lead { margin: 0 0 24px; color: var(--muted); font-size: 19px; }
.article-body .article-meta { margin: 0 0 24px; }
.article-body > figure { margin: 24px 0; }
.article-body > figure > figcaption { margin-top: 8px; font-size: 13px; line-height: 1.6; color: var(--muted); }
.article-body .featured-image { display: block; max-width: 100%; height: auto; margin: 0 auto 26px; border-radius: 12px; }
.article-body .article-inline-image { margin: 28px auto; max-width: 760px; }
.article-body .article-inline-image img { display: block; width: 100%; height: auto; border-radius: 12px; }
.article-body .article-inline-image figcaption { margin-top: 8px; color: var(--muted); font-size: 13px; text-align: center; }
.article-body .table-scroll { overflow: auto; }
.article-body table { width: 100%; min-width: 520px; border-collapse: collapse; }
.article-body th, .article-body td { padding: 10px 12px; border: 1px solid var(--line); text-align: left; }
.article-body th { background: #f0ede3; }
.comparison-infographic { margin: 30px 0 16px; padding: clamp(16px, 4vw, 28px); border-radius: 18px; background: #eaf1e9; border: 1px solid #c7dcc6; }
.comparison-infographic h3 { margin: 0; font-size: clamp(21px, 5vw, 28px); line-height: 1.35; }
.comparison-infographic > p { margin: 4px 0 18px; color: var(--muted); }
.comparison-infographic-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 235px), 1fr)); gap: 12px; }
.comparison-infographic-card { display: grid; align-content: start; gap: 8px; min-width: 0; padding: 16px; background: #fff; border-radius: 14px; }
.comparison-infographic-name { font-weight: 700; line-height: 1.45; overflow-wrap: anywhere; }
.comparison-infographic-value { display: flex; align-items: baseline; gap: 7px; font-size: clamp(28px, 7vw, 38px); line-height: 1.2; font-variant-numeric: tabular-nums; }
.comparison-infographic-value small { font-size: 14px; font-weight: 700; color: var(--muted); }
.comparison-infographic-track { display: block; height: 11px; border-radius: 999px; background: #e6e6dd; overflow: hidden; }
.comparison-infographic-track > span { display: block; height: 100%; border-radius: inherit; background: #4d8054; }
.comparison-infographic figcaption { margin-top: 14px; color: var(--muted); font-size: 13px; line-height: 1.55; }
.comparison-method { display: grid; gap: 12px; padding-left: 24px; color: var(--ink); font-size: 16px; line-height: 1.65; }
.comparison-method li { padding-left: 3px; font-weight: 600; overflow-wrap: anywhere; }
.article-body .cta { margin-top: 30px; }
.article-body .cta a { display: inline-block; padding: 10px 18px; border-radius: 999px; background: #ecd486; color: #29230f; font-weight: 700; text-decoration: none; }
.article-body .note { margin-top: 36px; color: var(--muted); font-size: 13px; }
.article-body .related ul { padding-left: 1.4em; }
.article-toc, .related { margin-top: 26px; padding: 18px 22px; background: #f0eee7; border: 1px solid var(--line); border-radius: 14px; }
.article-toc h2, .related h2 { margin: 0 0 8px; font-size: 18px; }
.article-toc ol { margin: 0; padding-left: 1.5em; }
.article-toc li { padding: 2px 0; }
.article-toc a, .related a { text-underline-offset: 3px; }
.related p { margin: 6px 0 12px; color: var(--muted); }
.related-archive { display: inline-block; font-weight: 700; }
.article-pages { display: flex; flex-wrap: wrap; gap: 12px 22px; margin-top: 28px; }
.article-pages a { display: inline-flex; align-items: center; min-height: 42px; padding: 7px 14px; border: 1px solid var(--line); border-radius: 999px; background: var(--panel); text-decoration: none; text-underline-offset: 4px; }
.article-pages a:hover { background: #f1ead5; border-color: var(--gold); }

@media (max-width: 600px) {
  header, footer { padding-left: 16px; padding-right: 16px; }
  header { align-items: flex-start; }
  header nav { gap: 6px 14px; }
  main { padding: 28px 14px 44px; }
  .content-main { padding: 28px 14px 44px; }
  .hero { padding-top: 8px; }
  .intro { font-size: 16px; }
  .home-page section { margin-top: 18px; padding: 18px; }
  .links { display: grid; grid-template-columns: 1fr; }
  .links a { text-align: center; }
  .article-body { border-radius: 12px; }
  .article-body h1 { font-size: 27px; line-height: 1.4; }
}

@media (max-width: 900px) {
  .content-layout { grid-template-columns: minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}

/* ProteinFirst app-first landing and supporting pages */
button, input { font: inherit; }
button:focus-visible, input:focus-visible { outline: 3px solid #28483c; outline-offset: 3px; }
.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 750;
  line-height: 1.4;
  text-align: center;
  text-decoration: none;
  overflow-wrap: anywhere;
  transition: background-color .18s ease, border-color .18s ease, transform .18s ease;
}
.button:hover { transform: translateY(-1px); }
.button-primary { background: #28483c; color: #fff; }
.button-primary:hover { background: #1e382e; }
.button-secondary { border-color: #9a8650; background: #fff; color: #4d421f; }
.button-secondary:hover { background: #f5efdf; }
.home-page { --content-width: 1160px; }
.app-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(260px, .75fr);
  align-items: center;
  gap: clamp(24px, 6vw, 72px);
  margin: 0 -20px 34px;
  padding: clamp(28px, 6vw, 64px);
  overflow: hidden;
  border: 1px solid #d8d4c8;
  border-radius: 28px;
  background: linear-gradient(120deg, #fbfaf5 0%, #f0ebdc 100%);
}
.app-hero h1, .app-detail-hero h1, .calculator-hero h1 { margin: 10px 0 16px; font-size: clamp(34px, 5.3vw, 58px); line-height: 1.28; letter-spacing: -.045em; }
.app-hero .intro, .app-detail-hero .intro, .calculator-hero .intro { max-width: 660px; margin: 0; color: #4e5850; font-size: clamp(17px, 2vw, 20px); }
.estimate-note { margin: 14px 0 0; color: #62675f; font-size: 13px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 25px; }
.store-links { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 14px; }
.store-button { display: inline-flex; min-height: 42px; align-items: center; justify-content: center; padding: 8px 14px; border: 1px solid #c9c5b8; border-radius: 10px; background: rgba(255,255,255,.75); color: #29332d; font-size: 14px; font-weight: 700; text-align: center; text-decoration: none; }
.store-button:hover { border-color: #28483c; background: #fff; }
.store-button-unavailable { color: #62675f; background: #eeece6; cursor: not-allowed; }
.store-note { flex-basis: 100%; margin: 0; color: #62675f; font-size: 12px; }
.app-hero-art { display: grid; justify-items: center; align-content: center; min-width: 0; padding: 20px; }
.app-preview-card { position: relative; display: grid; width: min(100%, 300px); gap: 6px; padding: 20px 22px; border: 1px solid #d8d4c8; border-radius: 18px; background: rgba(255,255,255,.88); box-shadow: 0 14px 40px rgba(42,49,40,.08); }
.preview-step { color: #88723b; font-size: 11px; font-weight: 800; letter-spacing: .12em; }
.preview-emoji { font-size: 27px; line-height: 1.2; }
.app-preview-card strong { color: #28372e; font-size: 18px; }
.preview-caption { color: var(--muted); font-size: 12px; }
.preview-connector { padding: 3px 0; color: #88723b; font-size: 24px; line-height: 1; }
.value-section, .home-page main > section:not(.app-hero) { margin-top: 30px; }
.section-heading { margin-bottom: 20px; }
.section-heading h2, .home-page section h2 { margin: 2px 0 0; }
.section-heading .eyebrow { margin: 0; }
.section-heading-row { display: flex; align-items: end; justify-content: space-between; gap: 20px; }
.section-intro { max-width: 700px; margin: -8px 0 18px; color: var(--muted); }
.feature-grid, .plan-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.feature-card, .plan-card { min-width: 0; padding: 22px; border: 1px solid var(--line); border-radius: 16px; background: var(--panel); }
.feature-number { display: inline-flex; width: 34px; height: 34px; align-items: center; justify-content: center; border-radius: 50%; background: #eee8d8; color: #6e581a; font-size: 12px; font-weight: 800; }
.feature-card h3 { margin: 14px 0 8px; font-size: 18px; }
.feature-card p, .calculator-promo p, .fine-print { margin: 0; color: var(--muted); }
.section-action { margin: 18px 0 0; }
.text-link { color: #4d421f; font-weight: 750; text-underline-offset: 4px; }
.desktop-link { white-space: nowrap; }
.mobile-link { display: none; }
.calculator-promo, .download-panel, .calculator-next-step { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: clamp(22px, 4vw, 34px); border: 1px solid #d8d4c8; border-radius: 20px; background: #eeece4; }
.calculator-promo > div { max-width: 690px; }
.calculator-promo h2, .download-panel h2 { margin: 0 0 8px; }
.calculator-promo .eyebrow, .download-panel .eyebrow { margin: 0 0 4px; }
.home-help { display: grid; grid-template-columns: minmax(190px, .65fr) 1.35fr; align-items: start; gap: 8px 30px; }
.home-help h2 { font-size: 20px; }
.quick-links { display: flex; flex-wrap: wrap; gap: 10px; }
.quick-links a { display: inline-flex; min-height: 42px; align-items: center; padding: 8px 14px; border: 1px solid var(--line); border-radius: 999px; background: #fff; color: #4d421f; font-weight: 650; text-decoration: none; }
.quick-links a:hover { border-color: #9a8650; background: #f7f3e8; }
.media-note { grid-column: 2; margin: 4px 0 0; color: var(--muted); font-size: 14px; }
.app-page main > section, .calculator-page main > section { margin-top: 26px; padding: clamp(22px, 4vw, 34px); border: 1px solid var(--line); border-radius: 20px; background: var(--panel); }
.app-detail-hero, .calculator-hero { padding: clamp(28px, 6vw, 60px) !important; background: linear-gradient(120deg, #fbfaf5 0%, #f0ebdc 100%) !important; }
.app-page .breadcrumb, .calculator-page .breadcrumb { margin-bottom: 14px; }
.app-detail-hero h1, .calculator-hero h1 { max-width: 820px; }
.check-list, .plan-card ul { display: grid; gap: 10px; margin: 0; padding-left: 1.3em; }
.check-list li::marker { color: #6f8b63; }
.plan-card { padding: 22px; }
.plan-card-standard { border-color: #a9986d; background: #fbfaf5; }
.plan-label { margin: 0 0 4px; color: #786526; font-size: 11px; font-weight: 800; letter-spacing: .14em; }
.plan-card h3 { margin: 0 0 16px; font-size: 20px; }
.plan-card ul { gap: 9px; padding-left: 1.1em; color: #4e5850; font-size: 14px; }
.plan-card li::marker { color: #788c79; }
.app-page .fine-print { margin-top: 16px; font-size: 13px; }
.download-panel { display: block !important; background: #f0ebdc !important; }
.download-panel > p:not(.eyebrow) { max-width: 700px; color: var(--muted); }
.download-panel .store-links { margin-top: 18px; }
.related-panel .quick-links { margin-top: 14px; }
.calculator-panel h2 { margin: 0 0 22px; }
.calculator-panel form { display: grid; gap: 22px; }
.form-field { display: grid; gap: 8px; min-width: 0; margin: 0; padding: 0; border: 0; }
.form-field > label, .form-field legend { margin-bottom: 2px; font-weight: 750; }
.input-with-unit { display: flex; max-width: 320px; align-items: center; gap: 10px; }
.input-with-unit input { width: 100%; min-height: 50px; padding: 10px 14px; border: 1px solid #aaa89d; border-radius: 10px; background: #fff; color: var(--ink); }
.input-with-unit span { color: var(--muted); font-weight: 700; }
.field-help { margin: 0; color: var(--muted); font-size: 13px; }
.choice-card { display: flex; max-width: 540px; min-height: 62px; align-items: center; gap: 12px; padding: 10px 14px; border: 1px solid var(--line); border-radius: 12px; background: #fff; cursor: pointer; }
.choice-card:has(input:checked) { border-color: #7b6b3f; background: #fbf8ef; box-shadow: inset 0 0 0 1px #7b6b3f; }
.choice-card input { width: 18px; height: 18px; accent-color: #28483c; }
.choice-card span { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 12px; }
.choice-card small { color: var(--muted); }
.calculate-button { justify-self: start; min-width: 220px; cursor: pointer; }
.form-error { margin: 0; color: #9b2828; font-weight: 700; }
.calculator-result { margin-top: 28px; padding: 24px; border: 1px solid #bbc8b9; border-radius: 16px; background: #f1f6ef; }
.result-label { margin: 0; color: var(--muted); font-size: 14px; font-weight: 700; }
.result-value { display: flex; align-items: baseline; gap: 8px; margin: 0; color: #244636; }
.result-value output { font-size: clamp(42px, 8vw, 62px); font-weight: 800; letter-spacing: -.04em; line-height: 1.2; }
.result-value span { font-weight: 700; }
.result-formula { margin: 6px 0 16px; color: var(--muted); }
.result-disclaimer { margin: 0 0 18px; color: #4e5850; font-size: 14px; }
.method-note p { max-width: 820px; }
.method-note p:last-child { margin-bottom: 0; }
.calculator-next-step { display: block !important; }
.calculator-next-step p { max-width: 720px; color: var(--muted); }
.calculator-next-step .button { margin-top: 8px; }
.app-article-cta { margin-top: 30px; padding: 22px; border: 1px solid #d8d4c8; border-radius: 16px; background: #f4f1e7; }
.app-article-cta h2 { margin: 0 0 6px; }
.app-article-cta p { margin: 0; color: var(--muted); }
.app-article-cta .button { margin-top: 0; }
.app-article-cta .article-cta-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; margin-top: 16px; }
.app-article-cta .article-cta-actions a { min-height: 48px; display: inline-flex; align-items: center; }

@media (max-width: 760px) {
  .app-hero { grid-template-columns: minmax(0, 1fr); gap: 20px; margin-right: -14px; margin-left: -14px; padding: 28px 22px; border-radius: 0; }
  .app-hero-art { grid-template-columns: minmax(0, 1fr) 28px minmax(0, 1fr); width: 100%; padding: 8px 0; }
  .app-preview-card { width: 100%; min-height: 142px; padding: 15px; }
  .preview-connector { transform: rotate(-90deg); }
  .feature-grid, .plan-grid { grid-template-columns: minmax(0, 1fr); }
  .home-help { grid-template-columns: minmax(0, 1fr); gap: 10px; }
  .media-note { grid-column: 1; }
  .calculator-promo { align-items: flex-start; flex-direction: column; }
  .desktop-link { display: none; }
  .mobile-link { display: inline-flex; margin-top: 16px; }
}
@media (max-width: 480px) {
  .home-page main { padding-right: 14px; padding-left: 14px; }
  .app-hero h1, .app-detail-hero h1, .calculator-hero h1 { font-size: clamp(31px, 9vw, 42px); }
  .hero-actions { display: grid; grid-template-columns: minmax(0, 1fr); }
  .hero-actions .button { width: 100%; }
  .store-links { align-items: stretch; }
  .store-button { flex: 1 1 140px; }
  .app-hero-art { grid-template-columns: minmax(0, 1fr) 18px minmax(0, 1fr); }
  .app-preview-card { min-height: 148px; padding: 12px; }
  .preview-caption { font-size: 11px; }
  .app-page main > section, .calculator-page main > section { padding: 20px 16px; }
  .app-page .app-detail-hero, .calculator-page .calculator-hero { padding: 26px 20px !important; }
  .calculate-button { width: 100%; }
  .quick-links { display: grid; grid-template-columns: minmax(0, 1fr); }
  .quick-links a { justify-content: center; text-align: center; }
}