/* Your HabitBuddy blog — 3-column layout aligned with app tokens */
:root {
  color-scheme: light;
  --color-charcoal: #222833;
  --color-mint: #47D5BF;
  --color-coral: #F5A08F;
  --color-off-white: #F7F4EF;
  --color-deep-slate: #131A24;
  --bg: var(--color-off-white);
  --bg-shell: #EDE8E0;
  --surface: #FFFFFF;
  --surface-muted: rgba(247, 244, 239, 0.82);
  --text: var(--color-charcoal);
  --text-muted: rgba(34, 40, 51, 0.68);
  --text-light: rgba(34, 40, 51, 0.48);
  --primary: var(--color-mint);
  --primary-soft: rgba(71, 213, 191, 0.14);
  --border: rgba(34, 40, 51, 0.1);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-lg: 0 16px 48px rgba(19, 26, 36, 0.12);
  --sidebar-width: 240px;
  --rail-width: 320px;
  --max-shell: 1280px;
  --font: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body.blog-body {
  font-family: var(--font);
  background: linear-gradient(180deg, var(--bg-shell) 0%, var(--bg) 160px);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: #2FA894;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--color-charcoal);
}

.blog-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  max-width: var(--max-shell);
  margin: 0 auto;
  min-height: 100dvh;
}

.blog-sidebar {
  padding: 20px 16px;
  background: var(--color-off-white);
  border-bottom: 1px solid var(--border);
}

.blog-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
  margin-bottom: 20px;
}

.blog-brand img {
  border-radius: 12px;
}

.blog-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.blog-brand__text strong {
  font-size: 15px;
}

.blog-brand__text span {
  font-size: 13px;
  color: var(--text-muted);
}

.blog-sidebar__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.blog-sidebar__link {
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
}

.blog-sidebar__link:hover,
.blog-sidebar__link.is-active {
  background: var(--primary-soft);
  color: var(--text);
}

.blog-main {
  padding: 24px 20px 40px;
  min-width: 0;
}

.blog-rail {
  padding: 24px 20px 40px;
  border-top: 1px solid var(--border);
}

.blog-page-header {
  margin-bottom: 24px;
}

.blog-page-title {
  margin: 0 0 8px;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  line-height: 1.2;
}

.blog-page-lead {
  margin: 0;
  color: var(--text-muted);
  font-size: 1.05rem;
}

.blog-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.blog-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.6) inset;
}

.blog-card__date {
  display: block;
  font-size: 12px;
  color: var(--text-light);
  margin-bottom: 8px;
}

.blog-card__title {
  margin: 0 0 10px;
  font-size: 1.35rem;
  line-height: 1.3;
}

.blog-card__title a {
  color: inherit;
  text-decoration: none;
}

.blog-card__title a:hover {
  color: #2FA894;
}

.blog-card__excerpt {
  margin: 0 0 12px;
  color: var(--text-muted);
}

.blog-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.blog-tag {
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: #2FA894;
}

.blog-article__header {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.blog-article__date {
  display: block;
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 10px;
}

.blog-article__title {
  margin: 0 0 12px;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.2;
}

.blog-related-version {
  margin: 12px 0 0;
  font-size: 14px;
  color: var(--text-muted);
}

.blog-article__body.prose {
  font-size: 1.05rem;
}

.blog-article__body.prose > :first-child {
  margin-top: 0;
}

.blog-article__body.prose h2,
.blog-article__body.prose h3 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.blog-article__body.prose p,
.blog-article__body.prose ul,
.blog-article__body.prose ol,
.blog-article__body.prose blockquote,
.blog-article__body.prose pre {
  margin: 0 0 1rem;
}

.blog-article__body.prose blockquote {
  border-left: 3px solid var(--color-mint);
  padding-left: 1rem;
  color: var(--text-muted);
}

.blog-article__body.prose pre {
  background: var(--color-deep-slate);
  color: #eef2f6;
  padding: 1rem;
  border-radius: var(--radius-sm);
  overflow-x: auto;
}

.blog-article__body.prose img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
}

.blog-article__footer {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.blog-back {
  font-weight: 600;
  text-decoration: none;
}

.blog-rail__block + .blog-rail__block {
  margin-top: 24px;
}

.blog-rail__heading {
  margin: 0 0 10px;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-light);
}

.blog-rail__text {
  margin: 0 0 12px;
  color: var(--text-muted);
  font-size: 14px;
}

.blog-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--primary);
  color: var(--color-deep-slate);
  font-weight: 700;
  text-decoration: none;
}

.blog-cta:hover {
  filter: brightness(0.97);
  color: var(--color-deep-slate);
}

.blog-toc__list {
  margin: 0;
  padding-left: 1.1rem;
}

.blog-toc__item {
  margin-bottom: 6px;
  font-size: 14px;
}

.blog-toc__item--h3 {
  margin-left: 0.75rem;
}

.blog-related {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 14px;
}

.blog-related li {
  margin-bottom: 8px;
}

.blog-empty {
  color: var(--text-muted);
}

@media (min-width: 1024px) {
  body.blog-body {
    padding: 16px;
  }

  .blog-shell {
    grid-template-columns: var(--sidebar-width) minmax(0, 1fr) var(--rail-width);
    min-height: calc(100dvh - 32px);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background: var(--bg);
  }

  .blog-sidebar {
    border-bottom: none;
    border-right: 1px solid var(--border);
    min-height: 100%;
  }

  .blog-sidebar__nav {
    flex-direction: column;
    flex-wrap: nowrap;
  }

  .blog-main {
    padding: 32px 36px 48px;
    overflow-y: auto;
  }

  .blog-rail {
    border-top: none;
    border-left: 1px solid var(--border);
    background: var(--surface-muted);
    overflow-y: auto;
  }
}

@media (max-width: 1023px) {
  .blog-rail__block.blog-toc {
    display: none;
  }
}