/* ------------------------------------------------------------
   Inside the Craft — prototype styles
   Tone reference: McKinsey (serif display + neutral grotesk,
   deep navy / electric blue, generous white space, hairline rules)
------------------------------------------------------------ */

:root {
  --ink: #000000;
  --ink-2: #333333;
  --ink-3: #676767;
  --rule: #d0d0d0;
  --rule-strong: #000000;
  --paper: #ffffff;
  --paper-2: #f0f0f0;
  --navy: #051c2c;
  --navy-2: #0b2b40;
  --blue: #2251ff;
  --cyan: #00a9f4;
  --sky: #aae6f0;

  --serif: "Source Serif 4", "Times New Roman", serif;
  --sans: "Helvetica Neue", Helvetica, Arial, "Hiragino Sans", sans-serif;

  --wrap: 1280px;
  --gutter: 40px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 48px;
  height: 76px;
}
.logo {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.logo span { color: var(--blue); }
.nav {
  display: flex;
  gap: 32px;
  font-size: 15px;
  flex: 1;
}
.nav a { padding: 26px 0; border-bottom: 3px solid transparent; }
.nav a:hover,
.nav a[aria-current="page"] { border-bottom-color: var(--ink); }
.header-tools {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 15px;
}
.icon-btn {
  background: none;
  border: 0;
  padding: 4px;
  cursor: pointer;
  color: var(--ink);
  display: inline-flex;
}
.btn-subscribe {
  font: inherit;
  font-size: 15px;
  font-weight: 700;
  background: var(--navy);
  color: #fff;
  border: 0;
  padding: 11px 20px;
  cursor: pointer;
}
.btn-subscribe:hover { background: var(--blue); }
.menu-btn { display: none; }

/* ---------- Shared type ---------- */
.kicker {
  font-size: 14px;
  color: var(--ink-3);
  display: flex;
  gap: 4px 10px;
  align-items: center;
  flex-wrap: wrap;
  white-space: nowrap;
}
.kicker b { color: var(--ink); font-weight: 700; }
.kicker i { font-style: normal; color: var(--rule); }

.arrow-link {
  font-weight: 700;
  font-size: 16px;
  color: var(--blue);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.arrow-link::after { content: "→"; transition: transform .15s; }
.arrow-link:hover::after { transform: translateX(4px); }

.h-title:hover { text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 4px; }

/* ---------- Portrait placeholder ---------- */
.portrait {
  position: relative;
  overflow: hidden;
  background: var(--tone, #c9d3da);
}
.portrait svg.figure {
  position: absolute;
  inset: auto 0 0 0;
  width: 100%;
  height: 86%;
  color: var(--tone-fg, rgba(5, 28, 44, .22));
}
.portrait .ph-note {
  position: absolute;
  left: 12px;
  top: 10px;
  font-size: 11px;
  color: rgba(0,0,0,.45);
}

/* ---------- Index: page head ---------- */
.page-head {
  padding: 72px 0 56px;
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  gap: 64px;
  align-items: end;
}
.page-head h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(44px, 6.4vw, 92px);
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin: 0;
}
.page-head h1 em { font-style: italic; font-weight: 400; }
.page-head .intro {
  font-size: 20px;
  line-height: 1.5;
  color: var(--ink-2);
  margin: 0 0 8px;
}

/* ---------- Index: featured ---------- */
.featured {
  border-top: 1px solid var(--rule-strong);
  padding-top: 32px;
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: 56px;
}
.featured .portrait { aspect-ratio: 4 / 5; }
.featured-body { display: flex; flex-direction: column; padding-top: 8px; }
.featured-body h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(34px, 3.8vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 20px 0 24px;
}
.featured-body .dek { font-size: 20px; color: var(--ink-2); margin: 0 0 32px; max-width: 34em; }
.person {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 16px;
  font-size: 15px;
  border-top: 1px solid var(--rule);
  padding-top: 20px;
  margin-top: auto;
}
.person dt { color: var(--ink-3); }
.person dd { margin: 0; }
.featured-quote {
  font-family: var(--serif);
  font-size: 24px;
  line-height: 1.35;
  font-style: italic;
  margin: 0 0 32px;
  color: var(--navy);
}

/* ---------- Index: section heads ---------- */
.section { padding: 96px 0 0; }
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--rule-strong);
  padding-bottom: 16px;
  margin-bottom: 32px;
}
.section-head h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 40px;
  letter-spacing: -0.015em;
  line-height: 1.1;
  margin: 0;
}
.section-head p { margin: 8px 0 0; color: var(--ink-3); font-size: 16px; max-width: 40em; }

/* ---------- Index: portrait row (BCG-style) ---------- */
.portrait-row {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(240px, 1fr);
  gap: 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 8px;
}
.p-card { scroll-snap-align: start; display: flex; flex-direction: column; }
.p-card .portrait { aspect-ratio: 64 / 100; margin-bottom: 16px; }
.p-card .kicker { margin-bottom: 8px; }
.p-card h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 23px;
  line-height: 1.2;
  margin: 0 0 10px;
}
.p-card .who { font-size: 15px; color: var(--ink-3); margin: 0; }
.p-card .who b { color: var(--ink); font-weight: 700; }

/* ---------- Index: field index (list layout) ---------- */
.field-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 8fr);
  gap: 56px;
}
.field-filter { font-size: 15px; }
.field-filter h3 { font-size: 15px; font-weight: 700; margin: 0 0 12px; }
.field-filter ul { list-style: none; margin: 0 0 32px; padding: 0; }
.field-filter li button {
  font: inherit;
  background: none;
  border: 0;
  padding: 7px 0;
  cursor: pointer;
  color: var(--ink-2);
  width: 100%;
  text-align: left;
  display: flex;
  justify-content: space-between;
}
.field-filter li button span { color: var(--ink-3); }
.field-filter li button:hover { color: var(--blue); }
.field-filter li button[aria-pressed="true"] { color: var(--ink); font-weight: 700; }

.c-list { list-style: none; margin: 0; padding: 0; }
.c-item {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr) 160px;
  gap: 28px;
  padding: 24px 0;
  border-bottom: 1px solid var(--rule);
  align-items: start;
}
.c-item:first-child { padding-top: 0; }
.c-item .portrait { aspect-ratio: 1 / 1; }
.c-item h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 26px;
  line-height: 1.18;
  margin: 6px 0 8px;
}
.c-item p { margin: 0; font-size: 16px; color: var(--ink-2); }
.c-item .meta { font-size: 14px; color: var(--ink-3); text-align: right; }
.c-item .meta b { display: block; color: var(--ink); font-weight: 400; }
.c-item[hidden] { display: none; }

/* ---------- Index: by-region band ---------- */
.region-band {
  margin-top: 96px;
  background: var(--navy);
  color: #fff;
  padding: 72px 0 80px;
}
.region-band h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 40px;
  margin: 0 0 8px;
  letter-spacing: -0.015em;
}
.region-band > .wrap > p { color: rgba(255,255,255,.72); margin: 0 0 48px; font-size: 17px; }
.regions {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  border-top: 1px solid rgba(255,255,255,.35);
}
.region {
  padding: 24px 24px 0 0;
  border-right: 1px solid rgba(255,255,255,.18);
  margin-right: 24px;
}
.region:last-child { border-right: 0; margin-right: 0; }
.region .num {
  font-family: var(--serif);
  font-size: 64px;
  line-height: 1;
  color: var(--cyan);
}
.region:first-child .num { font-size: 96px; }
.region h3 { font-size: 17px; margin: 12px 0 4px; }
.region p { font-size: 15px; color: rgba(255,255,255,.7); margin: 0; }
.region:hover h3 { text-decoration: underline; }

/* ---------- Newsletter ---------- */
.newsletter {
  padding: 96px 0;
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  gap: 64px;
  align-items: end;
}
.newsletter h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(32px, 3.6vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}
.newsletter p { margin: 0; color: var(--ink-2); }
.nl-form { display: flex; border-bottom: 2px solid var(--ink); }
.nl-form input {
  flex: 1;
  font: inherit;
  border: 0;
  padding: 14px 0;
  outline: none;
  background: transparent;
  min-width: 0;
}
.nl-form button {
  font: inherit;
  font-weight: 700;
  border: 0;
  background: none;
  color: var(--blue);
  cursor: pointer;
  padding: 0 0 0 16px;
}
.nl-note { font-size: 13px; color: var(--ink-3); margin-top: 12px; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--rule-strong);
  padding: 48px 0 64px;
  font-size: 14px;
  color: var(--ink-3);
}
.site-footer .wrap {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
}
.site-footer .logo { color: var(--ink); font-size: 22px; display: block; margin-bottom: 12px; }
.site-footer h4 { color: var(--ink); font-size: 14px; margin: 0 0 12px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; line-height: 2; }
.site-footer a:hover { color: var(--ink); text-decoration: underline; }

/* ============================================================
   Article page
============================================================ */
.art-head {
  padding: 56px 0 40px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  max-width: 980px;
}
.art-head .kicker { margin-bottom: 24px; }
.art-head h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(40px, 5.2vw, 76px);
  line-height: 1.04;
  letter-spacing: -0.025em;
  margin: 0 0 28px;
}
.art-head .dek {
  font-size: 22px;
  line-height: 1.45;
  color: var(--ink-2);
  margin: 0;
  max-width: 40em;
}

.art-hero {
  display: grid;
  grid-template-columns: minmax(0, 8fr) minmax(0, 3fr);
  gap: 40px;
  border-top: 1px solid var(--rule-strong);
  padding-top: 32px;
}
.art-hero .portrait { aspect-ratio: 16 / 10; }
.art-hero figcaption { font-size: 14px; color: var(--ink-3); margin-top: 12px; }
.profile-card { font-size: 15px; }
.profile-card h2 {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 500;
  margin: 0 0 4px;
  line-height: 1.15;
}
.profile-card .role { color: var(--ink-2); margin: 0 0 24px; }
.profile-card dl { margin: 0; border-top: 1px solid var(--rule); }
.profile-card dl div { padding: 12px 0; border-bottom: 1px solid var(--rule); }
.profile-card dt { color: var(--ink-3); font-size: 13px; }
.profile-card dd { margin: 2px 0 0; }

.art-body {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 7fr) minmax(0, 2fr);
  gap: 48px;
  padding: 64px 0 32px;
}
.art-aside { font-size: 14px; color: var(--ink-3); }
.art-aside .sticky { position: sticky; top: 24px; }
.art-aside h3 { font-size: 14px; color: var(--ink); margin: 0 0 12px; }
.art-aside ol { margin: 0 0 32px; padding: 0; list-style: none; counter-reset: toc; }
.art-aside ol li { counter-increment: toc; padding: 8px 0; border-top: 1px solid var(--rule); display: flex; gap: 12px; }
.art-aside ol li::before { content: counter(toc, decimal-leading-zero); color: var(--ink-3); }
.art-aside ol a { color: var(--ink-2); }
.art-aside ol a:hover { color: var(--blue); }
.share { display: flex; gap: 8px; }
.share a {
  width: 36px; height: 36px;
  border: 1px solid var(--rule);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
}
.share a:hover { border-color: var(--ink); }

.prose { font-family: var(--serif); font-size: 21px; line-height: 1.6; color: var(--ink); }
.prose > p:first-child::first-letter {
  float: left;
  font-size: 84px;
  line-height: .86;
  padding: 6px 12px 0 0;
  font-weight: 500;
  color: var(--navy);
}
.prose p { margin: 0 0 1.1em; }
.prose h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 34px;
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 64px 0 24px;
  scroll-margin-top: 24px;
}
.prose .q {
  font-family: var(--sans);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--navy);
  margin: 40px 0 14px;
}
.prose .q::before { content: "Inside the Craft: "; color: var(--blue); }
.prose .a-name { font-family: var(--sans); font-size: 15px; font-weight: 700; margin-right: 6px; }

.pull {
  margin: 56px 0;
  padding: 32px 0;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--rule);
}
.pull blockquote {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.015em;
  font-weight: 500;
}
.pull cite { display: block; font-family: var(--sans); font-style: normal; font-size: 15px; color: var(--ink-3); margin-top: 16px; }

.takeaways {
  background: var(--paper-2);
  padding: 32px 36px;
  margin: 48px 0;
  font-family: var(--sans);
  font-size: 17px;
}
.takeaways h3 { margin: 0 0 16px; font-size: 18px; }
.takeaways ol { margin: 0; padding-left: 20px; }
.takeaways li { margin-bottom: 10px; }
.takeaways li::marker { color: var(--blue); font-weight: 700; }

.art-note { font-family: var(--sans); font-size: 14px; color: var(--ink-3); border-top: 1px solid var(--rule); padding-top: 20px; margin-top: 48px; }

.related { padding: 32px 0 0; }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .art-body { grid-template-columns: minmax(0, 1fr) minmax(0, 3fr); }
  .art-body .art-right { display: none; }
  .regions { grid-template-columns: 1fr 1fr; }
  .region { margin: 0; padding: 24px 24px 24px 0; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.18); }
  .region:first-child { grid-column: 1 / -1; }
}

@media (max-width: 860px) {
  :root { --gutter: 16px; }
  body { font-size: 17px; }
  .nav, .header-tools .login { display: none; }
  .menu-btn { display: inline-flex; }
  .site-header .wrap { height: 60px; justify-content: space-between; gap: 12px; }
  .header-tools { gap: 10px; }
  .logo { font-size: 22px; }
  .btn-subscribe { padding: 9px 14px; font-size: 14px; }

  .page-head { grid-template-columns: 1fr; gap: 24px; padding: 40px 0 32px; }
  .featured { grid-template-columns: 1fr; gap: 24px; }
  .featured .portrait { aspect-ratio: 4 / 3; }
  .section { padding-top: 64px; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 8px; }
  .section-head h2 { font-size: 32px; }
  .portrait-row { grid-auto-columns: 72%; gap: 16px; }

  .field-grid { grid-template-columns: 1fr; gap: 24px; }
  .field-filter ul { display: flex; gap: 8px 20px; flex-wrap: wrap; margin-bottom: 8px; }
  .field-filter li button { padding: 4px 0; width: auto; gap: 6px; }
  .field-filter .region-filter { display: none; }
  .c-item { grid-template-columns: 80px minmax(0, 1fr); gap: 16px; }
  .c-item h3 { font-size: 21px; }
  .c-item .meta { grid-column: 2; text-align: left; }
  .c-item .meta b { display: inline; margin-right: 8px; }

  .region-band { margin-top: 64px; padding: 48px 0; }
  .region-band h2 { font-size: 32px; }
  .regions { grid-template-columns: 1fr; }
  .region:first-child .num, .region .num { font-size: 56px; }

  .newsletter { grid-template-columns: 1fr; gap: 24px; padding: 64px 0; }
  .site-footer .wrap { grid-template-columns: 1fr 1fr; }
  .site-footer .wrap > div:first-child { grid-column: 1 / -1; }

  .art-head { padding: 32px 0 28px; }
  .art-head .dek { font-size: 19px; }
  .art-hero { grid-template-columns: 1fr; gap: 24px; }
  .art-body { grid-template-columns: 1fr; padding-top: 40px; gap: 24px; }
  .art-aside .sticky { position: static; }
  .art-aside ol { display: none; }
  .art-aside h3.toc-h { display: none; }
  .prose { font-size: 19px; }
  .prose h2 { font-size: 28px; }
  .takeaways { padding: 24px 20px; }
}