/* Best Research Peptide Guide — editorial magazine stylesheet */

:root {
  --navy: #1a2b4a;
  --navy-deep: #0f1c33;
  --navy-soft: #2a3d5f;
  --cream: #f8f5ee;
  --cream-warm: #f1ecdf;
  --paper: #ffffff;
  --orange: #d4612a;
  --orange-dark: #b04f1c;
  --ink: #1a1a1a;
  --muted: #5a5a5a;
  --rule: #d9d2c2;
  --rule-soft: #e8e3d6;

  --serif: "Source Serif 4", "Source Serif Pro", "Lora", Georgia, "Times New Roman", serif;
  --sans: "Inter", "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --container: 1180px;
  --container-narrow: 760px;
}

/* ---------- Reset / base ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--orange-dark); text-decoration: underline; text-underline-offset: 2px; text-decoration-thickness: 1px; }
a:hover { color: var(--navy); }

h1, h2, h3, h4 {
  font-family: var(--serif);
  color: var(--navy);
  font-weight: 600;
  line-height: 1.22;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2rem, 4.6vw, 3.4rem); margin: 0 0 .6em; }
h2 { font-size: clamp(1.45rem, 2.4vw, 1.95rem); margin: 2.2em 0 .6em; }
h3 { font-size: 1.2rem; margin: 1.6em 0 .4em; }

p { margin: 0 0 1.1em; }

ul, ol { padding-left: 1.4em; margin: 0 0 1.2em; }
li { margin-bottom: .35em; }

hr {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 2.4em 0;
}

/* ---------- Layout container ---------- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}
.container--narrow { max-width: var(--container-narrow); }

/* ---------- Header / Nav ---------- */
.site-header {
  background: var(--cream);
  border-bottom: 1px solid var(--rule);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(6px);
  background: rgba(248, 245, 238, 0.94);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: .65rem;
  color: var(--navy);
  text-decoration: none;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.005em;
}
.brand:hover { color: var(--navy); }
.brand svg { flex-shrink: 0; }

.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text .brand-name { font-size: 1.02rem; }
.brand-text .brand-sub { font-family: var(--sans); font-size: .68rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.13em; color: var(--muted); margin-top: 2px; }

.nav-links {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 1.6rem;
  font-family: var(--sans);
  font-size: .9rem;
}
.nav-links a {
  color: var(--navy);
  text-decoration: none;
  font-weight: 500;
}
.nav-links a:hover { color: var(--orange-dark); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--navy);
  color: var(--navy);
  padding: .35rem .7rem;
  font-family: var(--sans);
  font-size: .85rem;
  cursor: pointer;
  border-radius: 2px;
}

@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--cream);
    border-bottom: 1px solid var(--rule);
    flex-direction: column;
    padding: 1rem 1.25rem;
    gap: 1rem;
  }
  .nav-links.open { display: flex; }
}

/* ---------- Hero ---------- */
.hero {
  padding: 3.8rem 0 3rem;
  border-bottom: 1px solid var(--rule);
  background:
    radial-gradient(circle at 18% 20%, rgba(212, 97, 42, 0.06), transparent 55%),
    radial-gradient(circle at 85% 80%, rgba(26, 43, 74, 0.05), transparent 60%),
    var(--cream);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 3rem;
  align-items: center;
}

@media (max-width: 820px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2rem; }
}

.eyebrow {
  display: inline-block;
  font-family: var(--sans);
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--orange-dark);
  border-top: 2px solid var(--orange);
  padding-top: .35rem;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  margin: 0 0 1rem;
  letter-spacing: -0.015em;
}

.hero-lede {
  font-family: var(--serif);
  font-size: 1.2rem;
  line-height: 1.55;
  color: var(--navy-soft);
  margin-bottom: 1.6rem;
}

.hero-meta {
  font-family: var(--sans);
  font-size: .85rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.hero-art {
  position: relative;
  aspect-ratio: 4 / 5;
  background:
    linear-gradient(135deg, var(--navy) 0%, var(--navy-deep) 100%);
  border-radius: 2px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 24px 60px -28px rgba(15, 28, 51, 0.45);
}
.hero-art::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(248, 245, 238, 0.04) 0 1px, transparent 1px 14px),
    repeating-linear-gradient(0deg, rgba(248, 245, 238, 0.04) 0 1px, transparent 1px 14px);
}
.hero-art svg { position: relative; max-width: 70%; height: auto; }

/* ---------- Section heads ---------- */
.section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--rule);
}
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 2rem;
  gap: 1rem;
  flex-wrap: wrap;
}
.section-head h2 {
  margin: 0;
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  border-top: 2px solid var(--navy);
  padding-top: .9rem;
  flex: 1 1 auto;
}
.section-head .section-meta {
  font-family: var(--sans);
  font-size: .78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
  padding-top: 1rem;
}

/* ---------- Article cards ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.4rem 2rem;
}
@media (max-width: 720px) {
  .cards { grid-template-columns: 1fr; gap: 2rem; }
}

.card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  border-top: 1px solid var(--rule);
  padding-top: 1.4rem;
  transition: transform .25s ease;
}
.card:hover { color: inherit; }
.card:hover h3 { color: var(--orange-dark); }

.card-tag {
  font-family: var(--sans);
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--orange-dark);
  margin-bottom: .8rem;
}

.card h3 {
  font-size: 1.55rem;
  margin: 0 0 .7rem;
  line-height: 1.2;
  transition: color .2s ease;
}

.card-dek {
  font-family: var(--serif);
  font-size: 1.02rem;
  color: var(--navy-soft);
  margin-bottom: .9rem;
  line-height: 1.5;
}

.card-byline {
  font-family: var(--sans);
  font-size: .8rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: auto;
}

.card-art {
  aspect-ratio: 16 / 10;
  margin-bottom: 1.2rem;
  background: var(--navy);
  position: relative;
  overflow: hidden;
  border-radius: 2px;
}
.card-art svg { width: 100%; height: 100%; display: block; }

/* Variants — different visual feels per card */
.card-art--1 { background: linear-gradient(140deg, #1a2b4a 0%, #2a3d5f 100%); }
.card-art--2 { background: linear-gradient(140deg, #d4612a 0%, #b04f1c 100%); }
.card-art--3 { background: linear-gradient(140deg, #2a3d5f 0%, #1a2b4a 50%, #d4612a 130%); }
.card-art--4 { background: linear-gradient(140deg, #f1ecdf 0%, #d4612a 110%); color: var(--navy); }

/* ---------- Two-column teaser blocks ---------- */
.teasers {
  padding: 4rem 0;
  border-bottom: 1px solid var(--rule);
}
.teasers > .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}
@media (max-width: 760px) {
  .teasers { padding: 3rem 0; }
  .teasers > .container { grid-template-columns: 1fr; gap: 2rem; }
}

.teaser h2 {
  margin-top: 0;
  border-top: 2px solid var(--orange);
  padding-top: .9rem;
}
.teaser p { font-size: 1.02rem; color: var(--navy-soft); }
.teaser .btn-link {
  display: inline-block;
  font-family: var(--sans);
  font-size: .85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--orange-dark);
  text-decoration: none;
  border-bottom: 1px solid var(--orange);
  padding-bottom: 2px;
  margin-top: .5rem;
}
.teaser .btn-link:hover { color: var(--navy); border-color: var(--navy); }

/* ---------- Article page ---------- */
.article-page {
  background: var(--paper);
}

.article-hero {
  padding: 3.2rem 0 1.6rem;
  background: var(--cream);
  border-bottom: 1px solid var(--rule);
}
.article-hero h1 {
  max-width: 880px;
  font-size: clamp(2rem, 4.4vw, 3.2rem);
  margin-bottom: 1rem;
}
.article-meta {
  font-family: var(--sans);
  font-size: .85rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.article-meta strong { color: var(--navy); font-weight: 600; }

.article-body-wrap {
  padding: 3rem 0 4rem;
}

.article-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 3rem;
  align-items: flex-start;
}
@media (max-width: 960px) {
  .article-layout { grid-template-columns: 1fr; gap: 1rem; }
}

.toc {
  position: sticky;
  top: 5.5rem;
  font-family: var(--sans);
  font-size: .82rem;
  border-top: 2px solid var(--navy);
  padding-top: .8rem;
}
.toc-label {
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-size: .7rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: .7rem;
}
.toc ol { list-style: none; padding: 0; margin: 0; counter-reset: tocnum; }
.toc li { margin-bottom: .55rem; counter-increment: tocnum; line-height: 1.35; }
.toc li::before {
  content: counter(tocnum, decimal-leading-zero);
  font-family: var(--serif);
  color: var(--orange-dark);
  font-weight: 600;
  margin-right: .55rem;
  font-size: .85rem;
}
.toc a { color: var(--navy); text-decoration: none; }
.toc a:hover { color: var(--orange-dark); }
@media (max-width: 960px) {
  .toc { position: static; }
  .toc ol { columns: 2; column-gap: 1.5rem; }
}

.article-body {
  max-width: 720px;
  font-size: 1.05rem;
}

.bluf {
  font-family: var(--serif);
  font-size: 1.2rem;
  line-height: 1.55;
  color: var(--navy);
  background: var(--cream-warm);
  border-left: 4px solid var(--orange);
  padding: 1.4rem 1.6rem;
  margin: 0 0 2rem;
  border-radius: 2px;
}
.bluf strong { color: var(--navy); }

/* Comparison table */
.table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0 2.5rem;
  border: 1px solid var(--rule);
  border-radius: 2px;
}
.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: .87rem;
  background: var(--paper);
  min-width: 720px;
}
.comparison-table thead {
  background: var(--navy);
  color: var(--cream);
}
.comparison-table th,
.comparison-table td {
  padding: .7rem .85rem;
  text-align: left;
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: top;
}
.comparison-table th {
  font-weight: 600;
  font-size: .76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-bottom: none;
}
.comparison-table tbody tr:nth-child(odd) { background: var(--cream); }
.comparison-table tbody tr:hover { background: var(--cream-warm); }
.comparison-table tbody tr:first-child td { font-weight: 600; color: var(--navy); }
.comparison-table tbody tr:first-child td:first-child {
  position: relative;
}
.comparison-table tbody tr:first-child td:first-child::before {
  content: "★";
  color: var(--orange);
  margin-right: .35rem;
}

/* Vendor entry */
.vendor-entry {
  margin: 3rem 0;
  padding-top: 2rem;
  border-top: 1px solid var(--rule);
}
.vendor-entry:first-of-type { border-top: none; padding-top: 0; }
.vendor-entry h2 {
  font-size: clamp(1.4rem, 2.4vw, 1.95rem);
  margin-top: 0;
}
.vendor-entry .score {
  font-family: var(--sans);
  font-size: .85rem;
  font-weight: 600;
  color: var(--orange-dark);
  letter-spacing: 0.04em;
  margin-bottom: 1rem;
  display: block;
}
.vendor-entry .key-facts {
  background: var(--cream);
  border: 1px solid var(--rule-soft);
  padding: 1.1rem 1.3rem;
  border-radius: 2px;
  margin: 1.3rem 0;
  font-size: .96rem;
}
.vendor-entry .key-facts ul { margin: 0; padding-left: 1.2rem; }

/* FAQ accordion */
.faq { margin: 2.5rem 0; }
.faq details {
  border-top: 1px solid var(--rule);
  padding: 1.1rem 0;
}
.faq details:last-of-type { border-bottom: 1px solid var(--rule); }
.faq summary {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--navy);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 2rem;
  line-height: 1.35;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: -2px;
  font-family: var(--sans);
  font-size: 1.5rem;
  color: var(--orange);
  transition: transform .2s;
}
.faq details[open] summary::after { content: "−"; }
.faq details > p,
.faq details > div { margin-top: .9rem; color: var(--ink); font-size: 1rem; }

/* Related articles */
.related {
  margin-top: 4rem;
  padding-top: 2.5rem;
  border-top: 2px solid var(--navy);
}
.related h2 {
  font-size: 1.3rem;
  margin: 0 0 1.3rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-family: var(--sans);
  font-weight: 700;
  font-size: .85rem;
  color: var(--muted);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
@media (max-width: 720px) { .related-grid { grid-template-columns: 1fr; } }
.related-card {
  display: block;
  text-decoration: none;
  color: var(--navy);
  border-top: 1px solid var(--rule);
  padding-top: 1rem;
}
.related-card .related-tag {
  font-family: var(--sans);
  font-size: .7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--orange-dark);
  margin-bottom: .4rem;
  display: block;
}
.related-card h3 {
  font-size: 1.05rem;
  margin: 0;
  font-family: var(--serif);
  line-height: 1.3;
  color: var(--navy);
}
.related-card:hover h3 { color: var(--orange-dark); }

/* Disclaimer */
.disclaimer {
  font-family: var(--sans);
  font-size: .82rem;
  color: var(--muted);
  font-style: italic;
  border-left: 3px solid var(--orange);
  padding: .8rem 1rem;
  margin: 2.5rem 0 0;
  background: var(--cream);
}

.author-bio {
  font-family: var(--serif);
  font-style: italic;
  font-size: .95rem;
  color: var(--navy-soft);
  border-top: 1px solid var(--rule);
  padding-top: 1.2rem;
  margin-top: 2rem;
}

/* ---------- Static text pages ---------- */
.page-hero {
  padding: 3.6rem 0 1.6rem;
  border-bottom: 1px solid var(--rule);
}
.page-hero h1 { margin: 0; }
.page-hero p { font-family: var(--serif); font-size: 1.15rem; color: var(--navy-soft); margin-top: .6rem; max-width: 720px; }

.page-body {
  padding: 3rem 0 4rem;
  max-width: var(--container-narrow);
  margin: 0 auto;
}
.page-body p, .page-body li { font-size: 1.04rem; }
.page-body h2 {
  margin-top: 2.5em;
  border-top: 2px solid var(--orange);
  padding-top: .8rem;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--navy-deep);
  color: var(--cream);
  padding: 3rem 0 2rem;
  font-family: var(--sans);
  font-size: .9rem;
}
.site-footer a { color: var(--cream); text-decoration: none; }
.site-footer a:hover { color: var(--orange); }

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2rem;
}
@media (max-width: 700px) { .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; } }

.footer-brand { display: flex; align-items: center; gap: .65rem; margin-bottom: 1rem; }
.footer-brand span { font-family: var(--serif); font-weight: 700; font-size: 1.1rem; color: var(--cream); }
.footer-tagline { color: rgba(248, 245, 238, 0.7); max-width: 360px; font-size: .9rem; }

.footer-col h4 {
  color: var(--orange);
  font-family: var(--sans);
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  margin: 0 0 .9rem;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: .5rem; }

.footer-bottom {
  border-top: 1px solid rgba(248, 245, 238, 0.12);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: .82rem;
  color: rgba(248, 245, 238, 0.65);
}
.footer-bottom .independent {
  color: var(--orange);
  font-weight: 500;
}

/* ---------- Utilities ---------- */
.kicker {
  font-family: var(--sans);
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--orange-dark);
}

strong { color: var(--navy); font-weight: 600; }

/* Anchor offset for sticky header */
:target { scroll-margin-top: 5rem; }