@import url('https://fonts.googleapis.com/css2?family=BIZ+UDPGothic:wght@400;700&family=Hina+Mincho&display=swap');

:root { --font-hina: 'Hina Mincho'; --font-biz: 'BIZ UDPGothic'; }

:root {
  --amber: #c98a3c;
  --amber-deep: #a4661f;
  --cream: #f7f0e4;
  --paper: #fffdf7;
  --paper-warm: #fbf4e6;
  --ink: #2a2017;
  --ink-soft: #6f5d49;
  --ink-faint: #95826b;
  --rule: #e6d8bf;
  --rule-soft: #efe5d2;
  --shadow: 0 24px 60px -36px rgba(82, 54, 18, 0.55);
  --font-head: var(--font-hina), "Hina Mincho", "Yu Mincho", serif;
  --font-body: var(--font-biz), "BIZ UDPGothic", "Hiragino Sans", sans-serif;
  --measure: 1180px;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background-color: var(--cream);
  background-image:
    radial-gradient(120% 70% at 50% -10%, rgba(201, 138, 60, 0.12), transparent 60%);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  z-index: 50;
}
.skip-link:focus {
  left: 0;
}

/* ===== Masthead (glossy magazine) ===== */
.masthead {
  background:
    linear-gradient(180deg, var(--paper) 0%, var(--paper-warm) 100%);
  border-bottom: 1px solid var(--rule);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.7) inset;
}
.masthead-inner {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 38px 40px 30px;
  text-align: center;
}
.masthead-kicker {
  display: block;
  font-size: 11px;
  letter-spacing: 0.46em;
  text-transform: uppercase;
  color: var(--amber-deep);
  margin-bottom: 10px;
  padding-left: 0.46em;
}
.masthead-logotype {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 58px;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--ink);
  text-decoration: none;
  position: relative;
  padding: 0 0.1em;
}
.masthead-logotype::after {
  content: "";
  position: absolute;
  left: 12%;
  right: 12%;
  bottom: -12px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--amber), transparent);
}
.masthead-line {
  margin: 26px 0 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.masthead-issue {
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--paper);
  background: var(--amber-deep);
  padding: 5px 14px 4px;
  border-radius: 2px;
}
.masthead-feature {
  font-family: var(--font-head);
  font-size: 17px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

/* ===== Home: contents spread ===== */
.contents-spread {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 64px 40px 92px;
}

.feature-lead {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
  padding-bottom: 64px;
  margin-bottom: 64px;
  border-bottom: 1px solid var(--rule);
}
.feature-lead-figure {
  display: block;
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: 6px;
  overflow: hidden;
  background:
    url("/images/amberpilot-lead.jpg") center / cover no-repeat,
    linear-gradient(150deg, var(--amber) 0%, var(--amber-deep) 78%);
  box-shadow: var(--shadow);
}
.feature-lead-figure::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(42, 32, 23, 0.04), rgba(42, 32, 23, 0.34));
}
.feature-lead-figure::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(255, 250, 240, 0.55);
  border-radius: 3px;
}
.feature-lead-stamp {
  position: absolute;
  top: 20px;
  left: 20px;
  z-index: 2;
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: 0.28em;
  color: var(--ink);
  background: rgba(255, 253, 247, 0.92);
  padding: 6px 14px 5px;
  border-radius: 2px;
}
.feature-lead-kicker {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.36em;
  text-transform: uppercase;
  color: var(--amber-deep);
  margin-bottom: 18px;
}
.feature-lead-title {
  font-family: var(--font-head);
  font-weight: 400;
  font-size: 44px;
  line-height: 1.35;
  letter-spacing: 0.02em;
  margin: 0 0 22px;
}
.feature-lead-title a {
  text-decoration: none;
  background-image: linear-gradient(transparent 64%, rgba(201, 138, 60, 0.22) 0);
}
.feature-lead-title a:hover {
  color: var(--amber-deep);
}
.feature-lead-deck {
  font-size: 17px;
  line-height: 2;
  color: var(--ink-soft);
  margin: 0 0 30px;
}
.feature-lead-open {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-head);
  font-size: 15px;
  letter-spacing: 0.14em;
  color: var(--ink);
  text-decoration: none;
  padding-bottom: 4px;
  border-bottom: 1.5px solid var(--amber);
}
.feature-lead-open::after {
  content: "\2192";
  color: var(--amber-deep);
  transition: transform 0.2s ease;
}
.feature-lead-open:hover::after {
  transform: translateX(5px);
}

/* contents grid */
.contents-grid {
  display: grid;
  grid-template-columns: 1fr 312px;
  gap: 64px;
  align-items: start;
}
.contents-head {
  margin-bottom: 34px;
}
.contents-title {
  font-family: var(--font-head);
  font-weight: 400;
  font-size: 30px;
  letter-spacing: 0.16em;
  margin: 0 0 16px;
  display: inline-flex;
  align-items: center;
  gap: 16px;
}
.contents-title::after {
  content: "";
  width: 70px;
  height: 1px;
  background: var(--amber);
}
.contents-deck {
  font-size: 15.5px;
  line-height: 2;
  color: var(--ink-soft);
  max-width: 62ch;
  margin: 0;
}

.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: feature;
}
.feature-item {
  border-top: 1px solid var(--rule-soft);
}
.feature-item:last-child {
  border-bottom: 1px solid var(--rule-soft);
}
.feature-item-link {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 26px;
  padding: 30px 6px;
  text-decoration: none;
  transition: background 0.2s ease;
}
.feature-item-link:hover {
  background: rgba(255, 253, 247, 0.7);
}
.feature-item-no {
  font-family: var(--font-head);
  font-size: 15px;
  letter-spacing: 0.16em;
  color: var(--amber-deep);
  padding-top: 6px;
}
.feature-item-title {
  display: block;
  font-family: var(--font-head);
  font-weight: 400;
  font-size: 25px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--ink);
  margin-bottom: 12px;
}
.feature-item-link:hover .feature-item-title {
  color: var(--amber-deep);
}
.feature-item-note {
  display: block;
  font-size: 14.5px;
  line-height: 1.95;
  color: var(--ink-soft);
  max-width: 58ch;
}
.feature-item-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.feature-tag {
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--amber-deep);
  background: var(--paper-warm);
  border: 1px solid var(--rule);
  padding: 4px 11px;
  border-radius: 999px;
}

/* contents sidebar */
.contents-side {
  position: sticky;
  top: 28px;
  display: flex;
  flex-direction: column;
  gap: 26px;
}
.side-block {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 26px 24px;
  box-shadow: 0 18px 40px -34px rgba(82, 54, 18, 0.4);
}
.side-kicker {
  display: block;
  font-family: var(--font-head);
  font-size: 14px;
  letter-spacing: 0.2em;
  color: var(--ink);
  padding-bottom: 16px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--rule-soft);
}
.notes-list,
.stance-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.note {
  display: block;
  padding: 12px 0;
  border-bottom: 1px dotted var(--rule);
}
.note:last-child {
  border-bottom: none;
}
.note-label {
  display: block;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--amber-deep);
  margin-bottom: 5px;
}
.note-text {
  display: block;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}
.stance-list li {
  position: relative;
  padding: 10px 0 10px 20px;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}
.stance-list li::before {
  content: "\00b7";
  position: absolute;
  left: 4px;
  top: 8px;
  color: var(--amber);
  font-size: 20px;
  line-height: 1;
}
.side-fine {
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
  text-align: center;
  margin: 0;
}

/* ===== Article: magazine feature ===== */
.feature {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 56px 40px 96px;
}
.feature-article {
  margin: 0 auto;
}
.feature-opener {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 52px;
  align-items: center;
  padding-bottom: 52px;
  margin-bottom: 52px;
  border-bottom: 1px solid var(--rule);
}
.feature-opener-visual {
  position: relative;
  aspect-ratio: 3 / 4;
  border-radius: 6px;
  overflow: hidden;
  background:
    url("/images/amberpilot-lead.jpg") center / cover no-repeat,
    linear-gradient(155deg, var(--amber) 0%, var(--amber-deep) 80%);
  box-shadow: var(--shadow);
}
.feature-opener-visual::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(255, 250, 240, 0.5);
  border-radius: 3px;
}
.feature-opener-stamp {
  position: absolute;
  top: 18px;
  left: 18px;
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: 0.28em;
  color: var(--ink);
  background: rgba(255, 253, 247, 0.92);
  padding: 6px 13px 5px;
  border-radius: 2px;
}
.feature-opener-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 20px;
}
.feature-headline {
  font-family: var(--font-head);
  font-weight: 400;
  font-size: 46px;
  line-height: 1.38;
  letter-spacing: 0.02em;
  margin: 0 0 24px;
}
.feature-deck {
  font-size: 17.5px;
  line-height: 2.05;
  color: var(--ink-soft);
  margin: 0 0 28px;
  padding-left: 18px;
  border-left: 2px solid var(--amber);
}
.feature-byline {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 18px;
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
}
.byline-name {
  font-family: var(--font-head);
  font-size: 15px;
  letter-spacing: 0.12em;
  color: var(--ink);
}
.byline-dates {
  display: inline-flex;
  gap: 16px;
}

/* feature body + sidebar */
.feature-spread {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 304px;
  gap: 60px;
  align-items: start;
}
.feature-main {
  min-width: 0;
}

.article-content {
  font-size: 16.5px;
  line-height: 2.1;
  color: var(--ink);
}
.article-content > p {
  margin: 0 0 26px;
}
.article-content h2 {
  font-family: var(--font-head);
  font-weight: 400;
  font-size: 27px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  margin: 52px 0 22px;
  padding-top: 8px;
  position: relative;
}
.article-content h2::before {
  content: "";
  display: block;
  width: 42px;
  height: 2px;
  background: var(--amber);
  margin-bottom: 18px;
}
.article-content h3 {
  font-family: var(--font-head);
  font-weight: 400;
  font-size: 21px;
  margin: 36px 0 16px;
  color: var(--amber-deep);
}
.article-content a {
  color: var(--amber-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--amber);
  padding-bottom: 1px;
}
.article-content a:hover {
  background: rgba(201, 138, 60, 0.12);
}

/* blockquote rendered as a magazine pull-quote */
.article-content blockquote {
  margin: 42px 0;
  padding: 8px 0 8px 0;
  border: none;
  text-align: center;
}
.article-content blockquote p {
  margin: 0;
}
.article-content blockquote {
  font-family: var(--font-head);
  font-weight: 400;
  font-size: 27px;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--amber-deep);
  position: relative;
  padding: 30px 36px;
}
.article-content blockquote::before,
.article-content blockquote::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 64px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--amber), transparent);
}
.article-content blockquote::before {
  top: 0;
}
.article-content blockquote::after {
  bottom: 0;
}

.article-content ul,
.article-content ol {
  margin: 0 0 28px;
  padding-left: 0;
  list-style: none;
}
.article-content ul li,
.article-content ol li {
  position: relative;
  padding: 7px 0 7px 26px;
  line-height: 1.95;
}
.article-content ul li::before {
  content: "\00b7";
  position: absolute;
  left: 6px;
  top: 8px;
  color: var(--amber);
  font-size: 22px;
  line-height: 1;
}
.article-content ol {
  counter-reset: li;
}
.article-content ol li::before {
  counter-increment: li;
  content: counter(li);
  position: absolute;
  left: 0;
  top: 9px;
  font-family: var(--font-head);
  font-size: 13px;
  color: var(--amber-deep);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 32px 0;
  font-size: 14.5px;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 6px;
  overflow: hidden;
}
.article-content thead th {
  background: var(--paper-warm);
  font-family: var(--font-head);
  font-weight: 400;
  letter-spacing: 0.06em;
  text-align: left;
  color: var(--ink);
  padding: 14px 16px;
  border-bottom: 2px solid var(--amber);
}
.article-content tbody td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--rule-soft);
  vertical-align: top;
  line-height: 1.8;
}
.article-content tbody tr:last-child td {
  border-bottom: none;
}
.article-content tbody tr:nth-child(even) td {
  background: rgba(251, 244, 230, 0.5);
}

/* feature FAQ */
.feature-faq {
  margin-top: 56px;
  padding-top: 40px;
  border-top: 1px solid var(--rule);
}
.feature-faq h2 {
  font-family: var(--font-head);
  font-weight: 400;
  font-size: 25px;
  letter-spacing: 0.08em;
  margin: 0 0 22px;
}
.feature-faq details {
  border-bottom: 1px solid var(--rule-soft);
  padding: 6px 0;
}
.feature-faq summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 36px 16px 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  position: relative;
}
.feature-faq summary::-webkit-details-marker {
  display: none;
}
.feature-faq summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-head);
  font-size: 22px;
  color: var(--amber-deep);
}
.feature-faq details[open] summary::after {
  content: "\2013";
}
.feature-faq details p {
  margin: 0 0 18px;
  color: var(--ink-soft);
  line-height: 2;
  font-size: 15px;
}

/* feature sidebar */
.feature-sidebar {
  position: sticky;
  top: 28px;
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.sidebar-card {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 26px 24px;
  box-shadow: 0 18px 40px -34px rgba(82, 54, 18, 0.4);
}
.sidebar-kicker {
  display: block;
  font-family: var(--font-head);
  font-size: 15px;
  letter-spacing: 0.16em;
  color: var(--ink);
  padding-bottom: 16px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--rule-soft);
}
.sidebar-tips {
  list-style: none;
  margin: 0;
  padding: 0;
}
.sidebar-tips li {
  position: relative;
  padding: 11px 0 11px 22px;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--ink-soft);
  border-bottom: 1px dotted var(--rule);
}
.sidebar-tips li:last-child {
  border-bottom: none;
}
.sidebar-tips li::before {
  content: "\2713";
  position: absolute;
  left: 2px;
  top: 11px;
  color: var(--amber-deep);
  font-size: 13px;
}
.sidebar-note {
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--ink-faint);
  padding: 0 4px;
}
.sidebar-note p {
  margin: 0;
}

.feature-foot {
  margin-top: 60px;
  padding-top: 32px;
  border-top: 1px solid var(--rule);
}
.feature-back {
  font-family: var(--font-head);
  font-size: 15px;
  letter-spacing: 0.12em;
  color: var(--ink);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.feature-back::before {
  content: "\2190";
  color: var(--amber-deep);
}
.feature-back:hover {
  color: var(--amber-deep);
}

/* ===== Colophon ===== */
.colophon {
  border-top: 1px solid var(--rule);
  background: linear-gradient(180deg, var(--paper-warm), var(--cream));
  margin-top: 40px;
}
.colophon-inner {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 48px 40px 56px;
  text-align: center;
}
.colophon-mark {
  font-family: var(--font-head);
  font-size: 28px;
  letter-spacing: 0.1em;
  color: var(--ink);
}
.colophon-inner p {
  max-width: 56ch;
  margin: 16px auto 22px;
  font-size: 14px;
  line-height: 1.95;
  color: var(--ink-soft);
}
.colophon-fine {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
}

/* ===== Responsive collapse ===== */
@media (max-width: 980px) {
  .feature-lead,
  .feature-opener {
    grid-template-columns: 1fr;
    gap: 34px;
  }
  .feature-lead-figure {
    aspect-ratio: 16 / 10;
  }
  .feature-opener-visual {
    aspect-ratio: 16 / 10;
  }
  .contents-grid,
  .feature-spread {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .contents-side,
  .feature-sidebar {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
  }
  .side-block,
  .sidebar-card {
    flex: 1 1 260px;
  }
}

@media (max-width: 620px) {
  .masthead-inner,
  .contents-spread,
  .feature,
  .colophon-inner {
    padding-left: 22px;
    padding-right: 22px;
  }
  .masthead-logotype {
    font-size: 44px;
  }
  .feature-lead-title {
    font-size: 33px;
  }
  .feature-headline {
    font-size: 33px;
  }
  .feature-item-link {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .article-content blockquote {
    font-size: 22px;
    padding: 26px 12px;
  }
  .contents-side,
  .feature-sidebar {
    flex-direction: column;
  }
}