.column-page {
  --column-bg: #fff8ef;
  --column-surface: #ffffff;
  --column-surface-muted: #fff4e8;
  --column-text: #1f1a16;
  --column-copy: #2f2821;
  --column-muted: #5f554c;
  --column-border: #c9b9a6;
  --column-accent: #8f300e;
  --column-accent-strong: #742407;

  background: var(--column-bg);
  color: var(--column-text);
}

.column-hero {
  max-width: 880px;
  margin: 0 auto;
  padding: clamp(38px, 7vw, 82px) clamp(20px, 5vw, 64px) clamp(34px, 6vw, 58px);
  border-bottom: 1px solid var(--column-border);
}

.column-hero__back {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
  margin-bottom: clamp(22px, 4vw, 36px);
  color: var(--column-accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
}

.column-hero__back::before {
  content: "←";
  font-size: 16px;
  line-height: 1;
}

.column-hero__meta {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
  color: var(--column-muted);
  font-size: 13px;
  font-weight: 700;
}

.column-hero__meta span {
  color: var(--column-accent);
  font-weight: 900;
  letter-spacing: 0.08em;
}

.column-hero__meta time {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin: 0;
  color: var(--column-muted);
  font-size: inherit;
  font-weight: inherit;
}

.column-hero__meta time::before {
  content: "";
  width: 1px;
  height: 1.1em;
  background: var(--column-border);
}

.column-hero h1 {
  margin: 0;
  color: var(--column-text);
  font-size: clamp(30px, 3.6vw, 44px);
  line-height: 1.36;
  font-weight: 700;
}

.column-layout {
  max-width: 1040px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(180px, 240px) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
  padding: clamp(34px, 6vw, 72px) clamp(20px, 5vw, 64px) clamp(64px, 9vw, 112px);
}

.column-toc {
  position: sticky;
  top: 104px;
  padding: 18px;
  background: var(--column-surface);
  border: 1px solid var(--column-border);
  box-shadow: 0 10px 28px rgba(36, 31, 26, 0.06);
}

.column-toc p {
  margin: 0 0 18px;
  color: var(--column-accent);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.column-toc nav {
  display: grid;
  gap: 10px;
}

.column-toc a {
  display: block;
  color: var(--column-copy);
  font-size: 14px;
  line-height: 1.65;
  font-weight: 800;
}

.column-toc a:hover {
  color: var(--column-accent-strong);
  text-decoration: underline;
  text-underline-offset: 0.22em;
}

.column-toc a:focus-visible,
.column-hero__back:focus-visible,
.column-content a:focus-visible,
.column-navigation a:focus-visible {
  outline: 3px solid rgba(143, 48, 14, 0.38);
  outline-offset: 4px;
}

.column-content {
  min-width: 0;
  max-width: 760px;
  color: var(--column-text);
  font-size: clamp(16px, 1.28vw, 18px);
  line-height: 2;
  overflow-wrap: anywhere;
}

.column-content > *:first-child {
  margin-top: 0;
}

.column-content p {
  margin: 0 0 1.55em;
  color: var(--column-text);
  font-weight: 500;
}

.column-content h1 {
  margin: 0 0 clamp(34px, 5vw, 56px);
  color: var(--column-text);
  font-size: clamp(20px, 2.1vw, 28px);
  line-height: 1.8;
  font-weight: 600;
}

.column-content > h1:first-child {
  margin-top: 0;
}

.column-content h2 {
  scroll-margin-top: 104px;
  margin: clamp(36px, 5vw, 58px) 0 18px;
  padding-left: 14px;
  border-left: 4px solid var(--column-accent);
  color: var(--column-text);
  font-size: clamp(22px, 2.1vw, 28px);
  line-height: 1.42;
  font-weight: 700;
}

.column-content h3 {
  margin: 34px 0 14px;
  color: var(--column-accent);
  font-size: clamp(20px, 2vw, 25px);
  line-height: 1.45;
  font-weight: 900;
}

.column-content strong {
  color: var(--column-accent-strong);
  font-weight: 900;
}

.column-content ul,
.column-content ol {
  margin: 0 0 1.8em;
  padding: 22px 28px 22px 48px;
  background: var(--column-surface);
  border: 1px solid var(--column-border);
  border-left: 4px solid var(--column-accent);
  color: var(--column-copy);
}

.column-content li {
  margin: 0.45em 0;
  padding-left: 0.15em;
}

.column-content blockquote {
  margin: 2.2em 0;
  padding: 24px 28px;
  background: var(--column-surface-muted);
  border: 1px solid var(--column-border);
  border-left: 4px solid var(--column-text);
  color: var(--column-text);
  font-size: 1.04em;
  font-weight: 800;
}

.column-content a {
  color: var(--column-accent-strong);
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 0.22em;
  font-weight: 800;
}

.column-content img {
  max-width: 100%;
  height: auto;
  margin: 1.8em 0;
}

.column-navigation {
  max-width: 1040px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 0 clamp(20px, 5vw, 64px) 72px;
}

.column-navigation a {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  padding: 0 20px;
  background: var(--column-text);
  color: #fff8ef;
  font-weight: 900;
}

.column-navigation a:hover {
  background: var(--column-accent-strong);
}

.column-empty {
  min-height: 52vh;
  padding: clamp(72px, 10vw, 136px) clamp(20px, 5vw, 76px);
}

@media (max-width: 900px) {
  .column-layout {
    grid-template-columns: 1fr;
  }

  .column-toc {
    position: static;
    max-width: 760px;
  }
}

@media (max-width: 560px) {
  .column-hero {
    padding-top: 34px;
  }

  .column-hero h1 {
    font-size: clamp(27px, 8vw, 36px);
  }

  .column-content {
    line-height: 1.9;
  }

  .column-content h2 {
    scroll-margin-top: 142px;
    font-size: clamp(21px, 6.2vw, 27px);
  }

  .column-content ul,
  .column-content ol {
    padding: 20px 20px 20px 32px;
  }

  .column-navigation {
    align-items: stretch;
    flex-direction: column;
  }
}