/* ==========================================================
   LOGAN TALKS HEALTH - "Documentary" theme (site-wide)
   Dark film stock · IBM Plex · real photography · NFS green accent
   ========================================================== */

:root {
  --black: #0d0d0c;        /* ground */
  --stock: #161614;        /* panels / film strip */
  --bone: #ece7dc;         /* text */
  --bone-2: #b9b3a6;       /* muted text */
  --line: #2c2b28;
  --amber: #84ad4d;        /* NFS green - the single accent */
  --display: 'IBM Plex Sans', system-ui, sans-serif;
  --text: 'IBM Plex Sans', system-ui, sans-serif;
  --ui: 'IBM Plex Mono', monospace;

  /* compatibility aliases for inner-page components */
  --paper: var(--black);
  --paper-deep: var(--stock);
  --card: var(--stock);
  --ink: var(--bone);
  --ink-soft: var(--bone-2);
  --brand: var(--amber);
  --brand-bright: var(--amber);
  --green: var(--amber);
  --green-bright: var(--amber);
  --red: #e0523a;
  --red-deep: #b8412d;
  --mono: var(--ui);
  --sans: var(--text);
  --serif: var(--display);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; animation: none !important; } }
body { background: var(--black); color: var(--bone); font-family: var(--text); font-size: 1rem; line-height: 1.7; }
a { color: inherit; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }
::selection { background: var(--amber); color: var(--black); }
.ui { font-family: var(--ui); letter-spacing: 0.12em; text-transform: uppercase; font-size: 0.68rem; font-weight: 500; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(13,13,12,0.92);
  border-bottom: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 0.85rem clamp(1rem, 4vw, 3rem);
}
.logo { font-family: var(--display); font-weight: 700; font-size: 1.15rem; text-decoration: none; letter-spacing: -0.01em; }
.logo em { font-style: italic; color: var(--amber); }
.links { display: flex; gap: 1.8rem; align-items: center; }
.links a, .item > a { font-family: var(--ui); font-size: 0.7rem; letter-spacing: 0.16em; text-transform: uppercase; text-decoration: none; color: var(--bone-2); }
.links a:hover, .item > a:hover { color: var(--bone); }
.item { position: relative; }
.item::after { content: ''; position: absolute; top: 100%; left: 0; right: 0; height: 12px; }
.drop { position: absolute; top: calc(100% + 10px); left: 0; background: var(--stock); border: 1px solid var(--line); min-width: 180px; padding: 0.4rem 0; display: none; }
.item:hover .drop, .item:focus-within .drop { display: block; }
.drop span { display: block; font-family: var(--ui); font-size: 0.6rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--bone-2); padding: 0.5rem 1rem 0.2rem; }
.drop a { display: block; padding: 0.5rem 1rem; color: var(--bone); }
.drop a:hover { color: var(--amber); }
.cta { font-family: var(--ui); font-size: 0.68rem; letter-spacing: 0.16em; text-transform: uppercase; text-decoration: none; color: var(--bone); border: 1px solid var(--bone-2); padding: 0.55rem 0.9rem; white-space: nowrap; }
.cta:hover { border-color: var(--amber); color: var(--amber); }
.burger { display: none; background: none; color: var(--bone); border: 1px solid var(--bone-2); font-family: var(--ui); letter-spacing: 0.16em; text-transform: uppercase; font-size: 0.68rem; padding: 0.5rem 0.8rem; cursor: pointer; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font-family: var(--ui); font-size: 0.7rem; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase;
  text-decoration: none; padding: 0.8rem 1.3rem; border: 1px solid var(--bone-2); color: var(--bone); background: transparent; cursor: pointer;
}
.btn:hover { border-color: var(--amber); color: var(--amber); }
.btn--red, .btn--dark { background: var(--amber); border-color: var(--amber); color: var(--black); font-weight: 600; }
.btn--red:hover, .btn--dark:hover { background: var(--bone); border-color: var(--bone); color: var(--black); }
.btn--ghost { background: transparent; }

/* ---------- Home: title card ---------- */
.title { position: relative; min-height: 92vh; display: flex; align-items: flex-end; background: #000 url('/images/lab-hero-wide.jpg') center 38% / cover no-repeat; }
.title::before { content: ''; position: absolute; inset: 0; background: linear-gradient(to top, rgba(13,13,12,0.96) 0%, rgba(13,13,12,0.55) 40%, rgba(13,13,12,0.15) 75%); }
.title__inner { position: relative; padding: 0 clamp(1rem, 4vw, 3rem) clamp(2.5rem, 6vh, 4.5rem); max-width: 1100px; }
.title .ui { color: var(--amber); background: rgba(13,13,12,0.88); display: inline-block; padding: 0.45rem 0.7rem; font-weight: 600; font-size: 0.7rem; margin-bottom: 1.2rem; }
.title h1 { font-family: var(--display); font-weight: 700; font-size: clamp(2.4rem, 6vw, 5rem); line-height: 1.02; letter-spacing: -0.025em; max-width: 14ch; text-wrap: balance; }
.title h1 em { font-style: italic; }
.title p { max-width: 52ch; margin-top: 1.4rem; color: var(--bone-2); font-size: 1.1rem; }
.title .cue { display: inline-block; margin-top: 2rem; font-family: var(--ui); font-size: 0.7rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--bone); text-decoration: none; border-bottom: 1px solid var(--amber); padding-bottom: 0.3rem; }

/* ---------- Home: chapters ---------- */
.film { max-width: 1100px; margin: 0 auto; padding: 0 clamp(1rem, 4vw, 3rem); }
.chapter { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 2rem; padding: clamp(3rem, 8vh, 5.5rem) 0; border-top: 1px solid var(--line); }
.chapter__num { position: sticky; top: 5rem; align-self: start; }
.chapter__num b { display: block; font-family: var(--display); font-weight: 700; font-size: 4.6rem; line-height: 0.9; letter-spacing: -0.03em; color: transparent; -webkit-text-stroke: 1px var(--bone-2); }
.chapter__num span { display: block; margin-top: 0.6rem; color: var(--amber); }
.chapter__body { max-width: 62ch; }
.chapter__body h2 { font-family: var(--display); font-weight: 700; font-size: clamp(1.6rem, 2.8vw, 2.2rem); line-height: 1.15; letter-spacing: -0.02em; margin-bottom: 1.4rem; }
.chapter__body p { margin-bottom: 1.25rem; }
.chapter__body p.lead { font-size: 1.15rem; line-height: 1.6; font-weight: 500; }
.chapter__body a { color: var(--amber); text-underline-offset: 3px; }
.q { font-family: var(--display); font-style: italic; font-weight: 600; font-size: 1.3rem; line-height: 1.4; border-left: 1px solid var(--amber); padding-left: 1.4rem; margin: 2rem 0; color: var(--bone); }
.legal { border: 1px solid var(--bone-2); padding: 1.2rem 1.4rem; margin: 2rem 0; }
.legal .ui { color: var(--amber); display: block; margin-bottom: 0.7rem; }
.legal q { display: block; font-family: var(--display); font-weight: 700; font-size: 1.05rem; margin-bottom: 0.4rem; quotes: '\201C' '\201D'; }
.legal i { color: var(--bone-2); font-size: 0.95rem; }
.calc { border-top: 1px solid var(--bone-2); border-bottom: 1px solid var(--bone-2); margin: 1.6rem 0; }
.calc__row { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; padding: 0.85rem 0; font-size: 1rem; color: var(--bone); }
.calc__row + .calc__row { border-top: 1px dashed var(--line); }
.calc__row span b { color: var(--amber); font-weight: 700; }
.calc__result { font-family: var(--ui); font-size: 1.15rem; font-weight: 600; color: var(--amber); white-space: nowrap; }
.chapter--last { padding-bottom: 1.5rem; }
.signoff { border-top: 1px solid var(--line); padding: 1.75rem 0 3rem; }
.still { margin: 0 auto; max-width: 1100px; padding: 0 clamp(1rem, 4vw, 3rem); }
.still figure { border-top: 1px solid var(--line); padding-top: 1.5rem; }
.still img { width: 100%; display: block; aspect-ratio: 21/9; object-fit: cover; filter: contrast(1.05) saturate(0.85); }
.still figcaption { display: flex; justify-content: space-between; gap: 1rem; padding: 0.7rem 0 0; font-family: var(--ui); font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--bone-2); }
.signoff img.sig { width: 210px; max-width: 55%; display: block; filter: invert(1) brightness(0.92); mix-blend-mode: screen; margin-bottom: 0.4rem; }
.signoff .ui { color: var(--bone-2); }
.ps { border: 1px solid var(--amber); padding: 1.2rem 1.4rem; margin-top: 2.2rem; max-width: 62ch; display: flex; gap: 1rem; align-items: baseline; }
.ps .ui { color: var(--amber); }
.ps p { margin: 0; }

/* ---------- Home: episodes (filmstrip) ---------- */
.episodes { border-top: 1px solid var(--line); padding: clamp(3rem, 8vh, 5rem) 0; }
.episodes__head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; margin-bottom: 1.6rem; }
.episodes__head h2 { font-family: var(--display); font-weight: 700; font-size: clamp(1.7rem, 3vw, 2.4rem); letter-spacing: -0.02em; }
.strip {
  display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 0;
  border-top: 14px solid var(--stock); border-bottom: 14px solid var(--stock);
  background:
    repeating-linear-gradient(90deg, transparent 0 18px, var(--black) 18px 30px) top / 100% 14px no-repeat,
    repeating-linear-gradient(90deg, transparent 0 18px, var(--black) 18px 30px) bottom / 100% 14px no-repeat,
    var(--stock);
  padding: 14px 0;
}
.ep { display: block; text-decoration: none; padding: 0.9rem; border-right: 1px solid var(--line); }
.ep:last-child { border-right: none; }
.ep img { width: 100%; aspect-ratio: 16/9; object-fit: cover; display: block; margin-bottom: 0.7rem; }
.ep .ui { color: var(--amber); display: block; margin-bottom: 0.3rem; }
.ep h3 { font-family: var(--text); font-weight: 600; font-size: 0.92rem; line-height: 1.35; color: var(--bone); }
.ep:hover h3 { text-decoration: underline; text-underline-offset: 3px; }
/* scrolling film strip: five frames visible on desktop, the rest scroll; wraps to the normal grid on small screens */
.strip--scroll { grid-template-columns: none; grid-auto-flow: column; grid-auto-columns: 20%; overflow-x: auto; overscroll-behavior-x: contain; scroll-snap-type: x proximity; scrollbar-width: thin; scrollbar-color: var(--line) transparent; }
.strip--scroll .ep { scroll-snap-align: start; }
.strip--scroll .ep:last-child { border-right: 1px solid var(--line); }
.episodes--interviews { padding-top: 0; }
.strip-hint { color: var(--bone-2); }
@media (max-width: 860px) { .strip-hint { display: none; } }
@media (max-width: 860px) {
  .strip--scroll { grid-auto-flow: row; grid-auto-columns: auto; grid-template-columns: 1fr 1fr; overflow: visible; }
  .strip--scroll .ep:last-child { border-right: none; }
}
@media (max-width: 640px) {
  .strip--scroll { grid-template-columns: 1fr; }
}

/* ---------- Signup (home two-column) ---------- */
.signup { padding: clamp(3rem, 8vh, 5rem) 0; border-top: 1px solid var(--line); }
.signup__panel { border: 1px solid var(--bone-2); padding: clamp(1.6rem, 4vw, 2.8rem); display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; }
.signup__panel .ui { color: var(--amber); display: block; margin-bottom: 0.7rem; }
.signup__panel h2 { font-family: var(--display); font-weight: 700; font-size: clamp(1.6rem, 3vw, 2.3rem); line-height: 1.12; letter-spacing: -0.02em; margin-bottom: 0.6rem; color: var(--bone); }
.signup__panel p { color: var(--bone-2); margin: 0; }
.signup__note { display: block; margin-top: 1rem; font-family: var(--ui); font-size: 0.66rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--bone-2); }
.signup__form { border-left: 1px solid var(--line); padding-left: clamp(1.5rem, 4vw, 3.5rem); }
.signup__panel .formkit-form { margin: 0 !important; }

/* ---------- Credits footer ---------- */
.credits { border-top: 1px solid var(--line); padding: 2rem clamp(1rem, 4vw, 3rem) 3rem; display: flex; justify-content: space-between; gap: 1rem 2rem; flex-wrap: wrap; font-family: var(--ui); font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--bone-2); }
.credits nav { display: flex; gap: 1.4rem; flex-wrap: wrap; }
.credits a { text-decoration: none; }
.credits a:hover { color: var(--amber); }

/* ==========================================================
   Inner-page components (dark re-implementations)
   ========================================================== */
.section { padding: clamp(3rem, 8vh, 5rem) clamp(1rem, 4vw, 3rem); max-width: 1100px; margin: 0 auto; }
.section__head { margin-bottom: 2rem; }
.section__title { font-family: var(--display); font-weight: 700; font-size: clamp(1.6rem, 3vw, 2.3rem); line-height: 1.15; letter-spacing: -0.02em; }
.section__note { font-family: var(--ui); font-size: 0.7rem; color: var(--bone-2); margin-top: 0.8rem; }
.section--dark { max-width: none; }
.section--dark .section__head { max-width: 1100px; margin-left: auto; margin-right: auto; }
.section--dark > div { max-width: 1100px !important; margin: 0 auto; }
.section--dark { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section--dark p { color: var(--bone-2) !important; }
.section--dark .section__title { border-left: 3px solid var(--amber); padding-left: 1.2rem; }

.kicker { font-family: var(--ui); font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--amber); display: inline-flex; align-items: center; gap: 0.6rem; margin-bottom: 1.2rem; font-weight: 600; }
.kicker--light { color: var(--amber); }
.kicker__pulse { width: 7px; height: 7px; background: var(--amber); border-radius: 50%; }
.hl { background: linear-gradient(transparent 62%, rgba(132, 173, 77, 0.45) 62%); color: inherit; padding: 0 0.05em; }

.lead-hero { max-width: 880px; margin: 0 auto; padding: clamp(3rem, 8vh, 5.5rem) clamp(1rem, 4vw, 3rem) 0; text-align: center; }
.lead-hero .kicker { justify-content: center; }
.lead-hero__headline { font-family: var(--display); font-weight: 700; font-size: clamp(2rem, 4.6vw, 3.6rem); line-height: 1.08; letter-spacing: -0.025em; margin-bottom: 1.3rem; text-wrap: balance; }
.lead-hero__sub { font-size: 1.08rem; color: var(--bone-2); max-width: 58ch; margin: 0 auto 2.5rem; }
.lead-hero__img-wrap { position: relative; }
.lead-hero__img { width: 100%; height: auto; display: block; border: 1px solid var(--line); }
.stamp, .lead-hero__stamp { display: none; }

.lead-gate { padding-top: clamp(2rem, 5vh, 3.5rem); padding-bottom: clamp(2rem, 5vh, 3.5rem); }
.subscribe__inner { border: 1px solid var(--bone-2); padding: clamp(1.6rem, 4vw, 2.6rem); text-align: center; max-width: 760px; margin: 0 auto; }
.subscribe__title { font-family: var(--display); font-weight: 700; font-size: clamp(1.5rem, 3vw, 2.2rem); line-height: 1.15; letter-spacing: -0.02em; margin-bottom: 0.5rem; }
.subscribe__sub { color: var(--bone-2); margin-bottom: 1.4rem; }
.subscribe__inner .formkit-form { margin: 0 auto !important; }
.letter__magnet { margin: 2.75rem 0; }

.video-section { padding-top: 0; }
.video-embed { max-width: 960px; margin: 0 auto; aspect-ratio: 16 / 9; border: 1px solid var(--line); background: #000; }
.video-embed iframe { width: 100%; height: 100%; display: block; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.25rem; }
.card { border: 1px solid var(--line); background: var(--stock); padding: 1.4rem; display: flex; flex-direction: column; gap: 0.9rem; }
.card:hover { border-color: var(--bone-2); }
.card__tag { font-family: var(--ui); font-size: 0.62rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--amber); display: inline-flex; align-items: center; gap: 0.4rem; align-self: flex-start; }
.card__title { font-family: var(--display); font-weight: 700; font-size: 1.15rem; line-height: 1.3; }
.card p { color: var(--bone-2) !important; }
.card__link { font-family: var(--ui); font-size: 0.68rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--bone); text-decoration: none; margin-top: auto; border-bottom: 1px solid var(--amber); align-self: flex-start; padding-bottom: 0.2rem; }
.card__link:hover { color: var(--amber); }

/* ---------- Blog post overrides (its inline CSS uses the alias vars) ---------- */
.post a { color: var(--amber); }
.post a:hover { color: var(--bone); }
.tldr { box-shadow: none !important; border-color: var(--bone-2) !important; background: var(--stock) !important; }
.toc { background: var(--stock) !important; }
.post h2.sec::before { background: var(--amber) !important; }
.quotebox { background: var(--stock) !important; border-left-color: var(--bone-2) !important; }
.quotebox--expert { border-left-color: var(--amber) !important; }
.notebox { background: var(--stock) !important; }
figure.chart { background: #ece7dc !important; color: #14161a !important; border-color: #ece7dc !important; }
figure.chart .chart__title { color: #14161a; }
figure.chart .chart__sub, figure.chart figcaption { color: #4a4a48 !important; }
table.data th { border-bottom-color: var(--bone-2) !important; }
.sources .tag { border-color: var(--line) !important; color: var(--bone-2) !important; }

/* ---------- Slide-in email collector ---------- */
.slidein {
  position: fixed; right: 1.25rem; bottom: 1.25rem; z-index: 90;
  width: min(380px, calc(100vw - 2.5rem));
  background: var(--black); color: var(--bone);
  border: 1px solid var(--bone-2);
  padding: 1.4rem 1.4rem 1.5rem;
  box-shadow: 0 24px 48px -16px rgba(0, 0, 0, 0.7);
  transform: translateY(calc(100% + 2rem));
  opacity: 0;
  transition: transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.35s;
}
.slidein.is-open { transform: translateY(0); opacity: 1; }
.slidein__close {
  position: absolute; top: 0.5rem; right: 0.6rem;
  background: none; border: none; color: var(--bone-2);
  font-size: 1.5rem; line-height: 1; cursor: pointer; padding: 0.25rem 0.4rem;
}
.slidein__close:hover { color: var(--bone); }
.slidein__tag { color: var(--amber); display: block; margin-bottom: 0.55rem; padding-right: 1.5rem; }
.slidein__title { font-family: var(--display); font-weight: 700; font-size: 1.25rem; line-height: 1.2; letter-spacing: -0.02em; margin-bottom: 0.4rem; }
.slidein__sub { color: var(--bone-2); font-size: 0.9rem; line-height: 1.5; margin-bottom: 1rem; }
.slidein .formkit-form { margin: 0 !important; }
@media (max-width: 640px) {
  .slidein { right: 0; bottom: 0; left: 0; width: auto; border-left: none; border-right: none; border-bottom: none; padding: 1.2rem 1.25rem 1.4rem; }
}
@media (prefers-reduced-motion: reduce) { .slidein { transition: none; } }

/* ---------- Mobile ---------- */
@media (max-width: 860px) {
  .chapter { grid-template-columns: 1fr; gap: 1rem; }
  .chapter__num { position: static; display: flex; align-items: baseline; gap: 1rem; }
  .chapter__num b { font-size: 2.8rem; }
  .chapter__num span { margin: 0; }
  .strip { grid-template-columns: 1fr 1fr; }
  .ep:nth-child(2n) { border-right: none; }
  .ep { border-bottom: 1px solid var(--line); }
  .signup__panel { grid-template-columns: 1fr; }
  .signup__form { border-left: none; padding-left: 0; border-top: 1px solid var(--line); padding-top: 1.5rem; }
}
@media (max-width: 640px) {
  .links { display: none; }
  .cta { display: none; }
  .burger { display: block; }
  .nav.open .links {
    display: flex; flex-direction: column; align-items: stretch; gap: 0;
    position: absolute; top: 100%; left: 0; right: 0;
    min-height: calc(100vh - 100%);
    background: var(--black);
    padding: 0.6rem 1.25rem 2.5rem;
  }
  .nav.open .links a, .nav.open .item > a {
    display: block; font-family: var(--text); font-size: 1.4rem; font-weight: 700; letter-spacing: -0.015em; text-transform: none;
    color: var(--bone); padding: 1.05rem 0; border-bottom: 1px solid #34362f;
  }
  .nav.open .item > a { border-bottom: none; padding-bottom: 0.4rem; }
  .nav.open .item { border-bottom: 1px solid #34362f; }
  .nav.open .drop { display: block; position: static; background: transparent; min-width: 0; border: none; border-left: 2px solid var(--amber); margin: 0.3rem 0 1.1rem 0.15rem; padding: 0 0 0 1rem; }
  .nav.open .drop span { color: var(--amber); font-size: 0.64rem; letter-spacing: 0.14em; padding: 0.35rem 0 0.25rem; }
  .nav.open .drop a { font-size: 1.05rem; font-weight: 600; padding: 0.7rem 0; border-bottom: 1px solid var(--line); }
  .nav.open .drop a:last-child { border-bottom: none; }
  .nav.open .burger { background: var(--bone); color: var(--black); border-color: var(--bone); }
  .strip { grid-template-columns: 1fr; }
  .ep { border-right: none; }
  .title { min-height: 80vh; background-position: 60% 30%; }
  /* keep the label off the face: drop it below the headline block, a touch smaller */
  .title__inner { display: flex; flex-direction: column; align-items: flex-start; }
  .title h1 { order: 1; }
  .title p { order: 2; }
  .title .ui { order: 3; font-size: 0.62rem; padding: 0.35rem 0.6rem; margin: 1.3rem 0 0; }
  .title .cue { order: 4; margin-top: 1.4rem; }
}