/* ============================================================
   catcancer.news — editorial stylesheet
   Accent: deep teal. Display: Fraunces. Body: Inter.
   ============================================================ */

:root {
  /* Fluid type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
  --text-sm: clamp(0.8125rem, 0.78rem + 0.25vw, 0.9375rem);
  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1rem + 0.55vw, 1.375rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.2vw, 2.125rem);
  --text-2xl: clamp(2rem, 1.3rem + 2.4vw, 3.25rem);
  --text-3xl: clamp(2.5rem, 1.2rem + 4vw, 4.75rem);
  --text-hero: clamp(2.5rem, 1rem + 3.6vw, 4rem);

  /* Spacing (4px base) */
  --space-1: 0.25rem;  --space-2: 0.5rem;   --space-3: 0.75rem;
  --space-4: 1rem;     --space-5: 1.25rem;  --space-6: 1.5rem;
  --space-8: 2rem;     --space-10: 2.5rem;  --space-12: 3rem;
  --space-16: 4rem;    --space-20: 5rem;    --space-24: 6rem;
  --space-32: 8rem;

  /* Warm editorial palette */
  --color-bg: #FBF8F3;
  --color-surface: #FFFDF9;
  --color-surface-2: #F5F0E7;
  --color-surface-offset: #F0E9DC;
  --color-border: #E4DBCB;
  --color-divider: #EAE2D3;

  --color-text: #1C1A16;
  --color-text-muted: #6B655A;
  --color-text-faint: #A29A8A;
  --color-text-inverse: #FBF8F3;

  /* Deep teal accent */
  --color-primary: #1E5F5F;
  --color-primary-hover: #164848;
  --color-primary-soft: #E1ECEA;
  --color-primary-ink: #123c3c;

  /* Terracotta — used sparingly for category tags only */
  --color-clay: #B84A2E;
  --color-clay-soft: #F4E2DA;

  --radius-sm: 3px;
  --radius-md: 6px;
  --radius-lg: 10px;

  --content-narrow: 660px;
  --content-default: 980px;
  --content-wide: 1220px;

  --transition: 200ms cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-sm: 0 1px 3px rgba(40, 32, 20, 0.06);
  --shadow-md: 0 8px 28px rgba(40, 32, 20, 0.09);
  --shadow-lg: 0 20px 50px rgba(40, 32, 20, 0.13);

  --font-display: 'Fraunces', 'Georgia', serif;
  --font-body: 'Inter', system-ui, sans-serif;
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  min-height: 100dvh;
  line-height: 1.65;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-bg);
  font-feature-settings: "kern", "liga", "calt";
}

img, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }
input { font: inherit; color: inherit; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 550;
  line-height: 1.08;
  letter-spacing: -0.015em;
  text-wrap: balance;
  color: var(--color-text);
}

p { text-wrap: pretty; }

a:not(.btn):not(.nav-link):not(.logo):not(.card):not(.footer-link) {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: color var(--transition);
}
a:not(.btn):not(.nav-link):not(.logo):not(.card):not(.footer-link):hover { color: var(--color-clay); }

::selection { background: var(--color-primary); color: var(--color-bg); }

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.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;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- layout helpers ---------- */
.wrap { width: 100%; max-width: var(--content-wide); margin-inline: auto; padding-inline: clamp(var(--space-5), 5vw, var(--space-16)); }
.wrap-narrow { max-width: var(--content-narrow); }
.wrap-default { max-width: var(--content-default); }

.section { padding-block: clamp(var(--space-16), 9vw, var(--space-32)); }
.section-tight { padding-block: clamp(var(--space-12), 7vw, var(--space-24)); }

.eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.rule { height: 1px; background: var(--color-divider); border: 0; }

/* ---------- header / nav ---------- */
.header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.header.is-scrolled { border-bottom-color: var(--color-border); box-shadow: var(--shadow-sm); }
.nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-6); height: 4.5rem;
}
.logo { display: inline-flex; align-items: center; color: var(--color-text); }
.logo svg { height: 26px; width: auto; }
.nav-links { display: flex; align-items: center; gap: var(--space-8); }
.nav-link {
  font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted);
  letter-spacing: 0.01em; position: relative; transition: color var(--transition);
}
.nav-link:hover { color: var(--color-text); }
.nav-cta {
  font-size: var(--text-sm); font-weight: 600; color: var(--color-primary);
  border: 1px solid var(--color-primary); padding: 0.5rem 1rem; border-radius: var(--radius-md);
  transition: all var(--transition);
}
.nav-cta:hover { background: var(--color-primary); color: var(--color-bg); }
.nav-toggle { display: none; }

/* ---------- buttons + form ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  font-size: var(--text-sm); font-weight: 600; letter-spacing: 0.01em;
  padding: 0.85rem 1.4rem; border-radius: var(--radius-md);
  transition: all var(--transition); white-space: nowrap;
}
.btn-primary { background: var(--color-primary); color: var(--color-text-inverse); }
.btn-primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); }

.signup {
  display: flex; gap: var(--space-3); flex-wrap: wrap;
}
.signup input[type="email"] {
  flex: 1 1 16rem; min-width: 0;
  padding: 0.85rem 1.1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  font-size: var(--text-base);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.signup input[type="email"]:focus {
  outline: none; border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}
.signup .btn { flex: 0 0 auto; }
.signup-note { margin-top: var(--space-3); font-size: var(--text-xs); color: var(--color-text-faint); }
.signup-success {
  display: none; align-items: center; gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-primary-soft); border-radius: var(--radius-md);
  color: var(--color-primary-ink); font-weight: 500;
}
.signup-success svg { flex: 0 0 auto; }
form.is-done .signup { display: none; }
form.is-done .signup-note { display: none; }
form.is-done .signup-success { display: flex; }

/* ---------- hero ---------- */
.hero { padding-top: clamp(var(--space-12), 6vw, var(--space-20)); padding-bottom: clamp(var(--space-16), 8vw, var(--space-24)); overflow: hidden; }
.hero-grid {
  display: grid; grid-template-columns: 1.08fr 0.92fr;
  gap: clamp(var(--space-8), 5vw, var(--space-20)); align-items: center;
}
.hero-kicker { display: flex; align-items: center; gap: var(--space-3); margin-bottom: var(--space-6); }
.hero-kicker .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--color-clay); }
.hero h1 {
  font-size: var(--text-hero); font-weight: 500; letter-spacing: -0.02em;
  line-height: 1.04; margin-bottom: var(--space-6);
}
.hero h1 em { font-style: italic; color: var(--color-primary); font-weight: 480; }
.hero-tagline {
  font-family: var(--font-display); font-style: italic; font-size: var(--text-lg);
  color: var(--color-text-muted); margin-bottom: var(--space-4); font-weight: 400;
}
.hero-lede { font-size: var(--text-lg); color: var(--color-text); max-width: 40ch; margin-bottom: var(--space-8); }
.hero-signup-wrap { max-width: 34rem; }
.hero-media { position: relative; }
.hero-media img {
  width: 100%; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
  aspect-ratio: 4 / 4.3; object-fit: cover; object-position: center 30%;
}
.hero-media figcaption {
  position: absolute; bottom: var(--space-4); left: var(--space-4); right: var(--space-4);
  font-size: var(--text-xs); color: var(--color-bg);
  background: rgba(28,26,22,0.55); backdrop-filter: blur(6px);
  padding: 0.5rem 0.85rem; border-radius: var(--radius-sm); letter-spacing: 0.02em;
}

/* ---------- mission / what-we-do ---------- */
.mission-head { max-width: 46rem; margin-bottom: var(--space-12); }
.mission-head h2 { font-size: var(--text-2xl); margin: var(--space-4) 0; }
.mission-head p { font-size: var(--text-lg); color: var(--color-text-muted); }
.mission-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-8);
}
.mission-item { border-top: 2px solid var(--color-primary); padding-top: var(--space-5); }
.mission-item .num { font-family: var(--font-display); font-size: var(--text-xl); color: var(--color-primary); display: block; margin-bottom: var(--space-2); }
.mission-item h3 { font-size: var(--text-lg); margin-bottom: var(--space-3); }
.mission-item p { color: var(--color-text-muted); font-size: var(--text-base); }

/* ---------- latest briefing (featured) ---------- */
.briefing { background: var(--color-surface-2); }
.briefing-inner { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: clamp(var(--space-8), 5vw, var(--space-20)); align-items: start; }
.briefing-media { position: sticky; top: 6rem; }
.briefing-media img { width: 100%; border-radius: var(--radius-lg); box-shadow: var(--shadow-md); aspect-ratio: 3/4; object-fit: cover; }
.tag {
  display: inline-block; font-size: var(--text-xs); font-weight: 700;
  letter-spacing: 0.12em; text-transform: uppercase;
  padding: 0.3rem 0.6rem; border-radius: var(--radius-sm);
  background: var(--color-clay-soft); color: var(--color-clay);
}
.tag.teal { background: var(--color-primary-soft); color: var(--color-primary-ink); }
.briefing-meta { display: flex; align-items: center; gap: var(--space-4); margin-bottom: var(--space-5); }
.briefing-meta .date { font-size: var(--text-xs); color: var(--color-text-faint); letter-spacing: 0.04em; text-transform: uppercase; }
.briefing h2 { font-size: var(--text-2xl); font-weight: 500; margin-bottom: var(--space-8); }

.layer { padding: var(--space-6) 0; border-top: 1px solid var(--color-divider); }
.layer:first-of-type { border-top: 0; padding-top: 0; }
.layer-label { display: flex; align-items: baseline; gap: var(--space-3); margin-bottom: var(--space-3); }
.layer-num {
  font-family: var(--font-display); font-size: var(--text-sm); font-weight: 600;
  color: var(--color-bg); background: var(--color-primary);
  width: 1.7rem; height: 1.7rem; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center; flex: 0 0 auto;
}
.layer-title { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 600; }
.layer-time { font-size: var(--text-xs); color: var(--color-text-faint); }
.layer p { color: var(--color-text); }
.layer p + p { margin-top: var(--space-3); }
.layer-list { list-style: none; display: grid; gap: var(--space-4); margin-top: var(--space-2); }
.layer-list li { padding-left: var(--space-5); position: relative; color: var(--color-text-muted); }
.layer-list li::before { content: ""; position: absolute; left: 0; top: 0.62em; width: 8px; height: 8px; background: var(--color-primary); border-radius: 1px; transform: rotate(45deg); }
.layer-list strong { color: var(--color-text); font-weight: 600; }

.pullquote {
  font-family: var(--font-display); font-style: italic; font-weight: 400;
  font-size: var(--text-xl); line-height: 1.25; color: var(--color-primary);
  border-left: 3px solid var(--color-clay); padding-left: var(--space-6);
  margin: var(--space-8) 0;
}

/* ---------- recent briefings grid ---------- */
.recent-head { display: flex; align-items: flex-end; justify-content: space-between; gap: var(--space-6); margin-bottom: var(--space-12); flex-wrap: wrap; }
.recent-head h2 { font-size: var(--text-2xl); }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.card {
  display: flex; flex-direction: column; gap: var(--space-4);
  padding: var(--space-6); background: var(--color-surface);
  border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--color-primary); }
.card-top { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); }
.card h3 { font-size: var(--text-lg); font-weight: 550; line-height: 1.2; }
.card p { color: var(--color-text-muted); font-size: var(--text-sm); flex: 1; }
.card-foot { display: flex; align-items: center; justify-content: space-between; margin-top: auto; padding-top: var(--space-2); }
.card-date { font-size: var(--text-xs); color: var(--color-text-faint); letter-spacing: 0.04em; }
.card-arrow { color: var(--color-primary); display: inline-flex; transition: transform var(--transition); }
.card:hover .card-arrow { transform: translate(3px,-3px); }

/* ---------- explainer framework ---------- */
.explainer { background: var(--color-primary); color: var(--color-text-inverse); }
.explainer .eyebrow { color: color-mix(in srgb, var(--color-text-inverse) 78%, transparent); }
.explainer h2 { color: var(--color-text-inverse); font-size: var(--text-2xl); margin: var(--space-4) 0 var(--space-4); }
.explainer-intro { color: color-mix(in srgb, var(--color-text-inverse) 82%, transparent); max-width: 46rem; margin-bottom: var(--space-16); font-size: var(--text-lg); }
.framework { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid rgba(251,248,243,0.22); }
.frame-step { padding: var(--space-8) var(--space-6) var(--space-6) 0; border-right: 1px solid rgba(251,248,243,0.16); }
.frame-step:last-child { border-right: 0; }
.frame-step .fn { font-family: var(--font-display); font-size: var(--text-3xl); font-weight: 400; color: rgba(251,248,243,0.45); display: block; line-height: 1; margin-bottom: var(--space-5); }
.frame-step h3 { color: var(--color-text-inverse); font-size: var(--text-lg); margin-bottom: var(--space-2); }
.frame-step .ftime { font-size: var(--text-xs); letter-spacing: 0.1em; text-transform: uppercase; color: color-mix(in srgb, var(--color-text-inverse) 60%, transparent); display: block; margin-bottom: var(--space-3); }
.frame-step p { font-size: var(--text-sm); color: color-mix(in srgb, var(--color-text-inverse) 80%, transparent); }
.explainer-quote {
  font-family: var(--font-display); font-style: italic; font-size: var(--text-xl);
  color: var(--color-text-inverse); text-align: center; max-width: 42ch;
  margin: var(--space-20) auto 0; line-height: 1.3;
}
.explainer-quote span { color: color-mix(in srgb, var(--color-text-inverse) 55%, transparent); }

/* ---------- trials ---------- */
.trials-head { max-width: 46rem; margin-bottom: var(--space-12); }
.trials-head h2 { font-size: var(--text-2xl); margin: var(--space-4) 0; }
.trials-head p { color: var(--color-text-muted); font-size: var(--text-lg); }
.trial {
  display: grid; grid-template-columns: auto 1fr auto; gap: var(--space-6); align-items: center;
  padding: var(--space-6) 0; border-top: 1px solid var(--color-divider);
}
.trial:last-child { border-bottom: 1px solid var(--color-divider); }
.trial-idx { font-family: var(--font-display); font-size: var(--text-xl); color: var(--color-primary); }
.trial-body h3 { font-size: var(--text-lg); margin-bottom: var(--space-2); }
.trial-body .meta { font-size: var(--text-sm); color: var(--color-text-muted); }
.trial-body .meta strong { color: var(--color-text); font-weight: 600; }
.trial-body .status { display: inline-block; margin-top: var(--space-2); font-size: var(--text-xs); font-weight: 600; color: var(--color-primary); letter-spacing: 0.04em; }
.trial-new { display: inline-block; vertical-align: middle; margin-left: var(--space-2); padding: 0.15em 0.55em; font-family: var(--font-body); font-size: 0.65em; font-weight: 700; letter-spacing: 0.08em; color: var(--color-bg); background: var(--color-accent); border-radius: 3px; text-transform: uppercase; }
.trial-link { font-size: var(--text-sm); font-weight: 600; color: var(--color-primary); white-space: nowrap; display: inline-flex; align-items: center; gap: var(--space-2); }
.trial-link:hover { color: var(--color-clay); }

/* ---------- second CTA ---------- */
.cta { }
.cta-card {
  background: var(--color-surface-offset); border-radius: var(--radius-lg);
  padding: clamp(var(--space-10), 6vw, var(--space-24));
  display: grid; grid-template-columns: 1.2fr 1fr; gap: clamp(var(--space-8), 5vw, var(--space-16)); align-items: center;
  border: 1px solid var(--color-border);
}
.cta-card h2 { font-size: var(--text-2xl); margin-bottom: var(--space-4); }
.cta-card p { color: var(--color-text-muted); font-size: var(--text-lg); }
.cta-media img { border-radius: var(--radius-md); box-shadow: var(--shadow-md); aspect-ratio: 4/3; object-fit: cover; }

/* ---------- footer ---------- */
.footer { background: var(--color-text); color: var(--color-text-inverse); padding-block: var(--space-16); }
.footer a { color: var(--color-text-inverse); }
.footer-top { display: flex; justify-content: space-between; gap: var(--space-8); flex-wrap: wrap; margin-bottom: var(--space-12); }
.footer .logo { color: var(--color-text-inverse); }
.footer-brand p { color: color-mix(in srgb, var(--color-text-inverse) 62%, transparent); max-width: 34ch; margin-top: var(--space-4); font-size: var(--text-sm); }
.footer-nav { display: flex; gap: var(--space-12); flex-wrap: wrap; }
.footer-col h4 { font-family: var(--font-body); font-size: var(--text-xs); letter-spacing: 0.14em; text-transform: uppercase; color: color-mix(in srgb, var(--color-text-inverse) 55%, transparent); margin-bottom: var(--space-4); font-weight: 600; }
.footer-col a.footer-link { display: block; font-size: var(--text-sm); color: color-mix(in srgb, var(--color-text-inverse) 82%, transparent); margin-bottom: var(--space-3); transition: color var(--transition); }
.footer-col a.footer-link:hover { color: var(--color-text-inverse); }
.footer-disclaimer { padding-top: var(--space-8); border-top: 1px solid rgba(251,248,243,0.16); }
.footer-disclaimer p { font-size: var(--text-xs); color: color-mix(in srgb, var(--color-text-inverse) 52%, transparent); max-width: 62ch; line-height: 1.6; }
.footer-copy { margin-top: var(--space-5); font-size: var(--text-xs); color: color-mix(in srgb, var(--color-text-inverse) 45%, transparent); }

/* ---------- about page ---------- */
.page-hero { padding-top: clamp(var(--space-16), 8vw, var(--space-24)); padding-bottom: clamp(var(--space-8), 4vw, var(--space-12)); }
.page-hero h1 { font-size: var(--text-3xl); font-weight: 500; letter-spacing: -0.025em; max-width: 18ch; margin: var(--space-5) 0; }
.page-hero .lede { font-size: var(--text-lg); color: var(--color-text-muted); max-width: 52ch; }
.about-figure img { width: 100%; border-radius: var(--radius-lg); box-shadow: var(--shadow-md); aspect-ratio: 16/9; object-fit: cover; object-position: center 35%; margin-block: var(--space-8); }
.prose { max-width: var(--content-narrow); }
.prose h2 { font-size: var(--text-xl); margin: var(--space-16) 0 var(--space-5); }
.prose h2:first-child { margin-top: 0; }
.prose p { font-size: var(--text-lg); color: var(--color-text); margin-bottom: var(--space-5); line-height: 1.7; }
.prose p.muted { color: var(--color-text-muted); }
.prose ul { list-style: none; display: grid; gap: var(--space-4); margin: var(--space-5) 0; }
.prose ul li { padding-left: var(--space-6); position: relative; color: var(--color-text-muted); font-size: var(--text-base); }
.prose ul li::before { content: ""; position: absolute; left: 0; top: 0.6em; width: 8px; height: 8px; background: var(--color-primary); border-radius: 1px; transform: rotate(45deg); }
.about-standards { background: var(--color-surface-2); border-left: 3px solid var(--color-primary); padding: var(--space-8); border-radius: 0 var(--radius-md) var(--radius-md) 0; margin: var(--space-8) 0; }
.about-standards p { font-size: var(--text-base); }

/* ---------- fade-in on scroll ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.7s cubic-bezier(0.16,1,0.3,1), transform 0.7s cubic-bezier(0.16,1,0.3,1); }
.reveal.in { opacity: 1; transform: none; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: var(--space-10); }
  .hero-media { order: -1; max-width: 30rem; }
  .briefing-inner { grid-template-columns: 1fr; }
  .briefing-media { position: static; max-width: 24rem; }
  .cta-card { grid-template-columns: 1fr; }
  .cta-media { order: -1; max-width: 28rem; }
  .framework { grid-template-columns: repeat(2, 1fr); }
  .frame-step { border-right: 0; border-bottom: 1px solid rgba(251,248,243,0.16); padding: var(--space-6) var(--space-4) var(--space-6) 0; }
  .frame-step:nth-child(odd) { padding-right: var(--space-6); }
}

@media (max-width: 700px) {
  .nav-links { display: none; position: absolute; top: 4.5rem; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; background: var(--color-bg); border-bottom: 1px solid var(--color-border); padding: var(--space-4) clamp(var(--space-5),5vw,var(--space-16)); box-shadow: var(--shadow-md); }
  .nav-links.open { display: flex; }
  .nav-links .nav-link { padding: var(--space-3) 0; border-bottom: 1px solid var(--color-divider); }
  .nav-links .nav-cta { margin-top: var(--space-3); text-align: center; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; width: 2.5rem; height: 2.5rem; color: var(--color-text); }
  .mission-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .cards { grid-template-columns: 1fr; }
  .framework { grid-template-columns: 1fr; }
  .frame-step, .frame-step:nth-child(odd) { padding: var(--space-6) 0; }
  .trial { grid-template-columns: 1fr; gap: var(--space-3); align-items: start; }
  .trial-idx { font-size: var(--text-lg); }
  .trial-link { margin-top: var(--space-1); }
  .footer-top { flex-direction: column; gap: var(--space-10); }
  .signup .btn { flex: 1 1 100%; }
}