/* DEV.to-inspired theme and layout */
:root,
:root[data-theme='light'] {
  /* Page + surface colors */
  --bg: #eef0f1; /* page background */
  --bg-elev: #ffffff; /* cards, header */
  --fg: #171717;
  --muted: #e5e7eb; /* borders */
  --accent: #3b49df; /* dev.to blue */

  /* Highlights */
  --hl: rgba(255,234,140,.55);
  --hl-focus: rgba(250,200,90,.65);
  --hl-own: rgba(140,220,255,.45);
  --ring: rgba(59,73,223,.35);

  /* Radius, shadows */
  --radius-1: 4px; --radius-2: 10px; --radius-3: 16px;
  --shadow-1: 0 2px 6px rgba(0,0,0,.04);
  --shadow-2: 0 8px 24px rgba(0,0,0,.12);
}

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

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: #0c1116;
    --bg-elev: #0f151b;
    --fg: #e5e9ef;
    --muted: #1d2731;
    --accent: #8aa0ff;
    --hl: rgba(255,215,90,.35);
    --hl-focus: rgba(255,205,80,.5);
    --hl-own: rgba(120,210,255,.35);
    --ring: rgba(138,160,255,.35);
    --shadow-1: 0 8px 28px rgba(0,0,0,.35);
    --shadow-2: 0 14px 48px rgba(0,0,0,.45);
  }
}

:root[data-theme='dark'] {
  --bg: #0c1116;
  --bg-elev: #0f151b;
  --fg: #e5e9ef;
  --muted: #1d2731;
  --accent: #8aa0ff;
  --hl: rgba(255,215,90,.35);
  --hl-focus: rgba(255,205,80,.5);
  --hl-own: rgba(120,210,255,.35);
  --ring: rgba(138,160,255,.35);
  --shadow-1: 0 8px 28px rgba(0,0,0,.35);
  --shadow-2: 0 14px 48px rgba(0,0,0,.45);
}

html, body { margin: 0; padding: 0; height: 100%; }
.app-shell {
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.7 system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Noto Sans JP", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 16px;
  background: var(--accent);
  color: #fff;
  padding: 8px 12px;
  border-radius: var(--radius-1);
  transition: top .2s ease;
  z-index: 40;
}
.skip-link:focus { top: 12px; }

.site-header {
  height: 56px;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 16px;
  border-bottom: 1px solid var(--muted);
  position: sticky; top: 0; background: var(--bg-elev); z-index: 30;
  gap: 16px;
}
.site-header .title { font-weight: 600; }
.site-header .actions { display: flex; gap: 8px; align-items: center; }
.site-header .brand { display:flex; align-items:center; gap:10px; }
.site-header .brand .logo { width: 28px; height: 28px; border-radius: 6px; background: #000; color:#fff; display:flex; align-items:center; justify-content:center; font-weight:800; font-size:12px; box-shadow: var(--shadow-1); }
.primary-nav { display: none; gap: 14px; font-size: 15px; }
.primary-nav a { color: inherit; text-decoration: none; padding: 6px 0; position: relative; }
.primary-nav a::after {
  content: '';
  position: absolute; left: 0; bottom: -8px;
  width: 100%; height: 2px; background: var(--accent);
  opacity: 0; transform: scaleX(.6); transform-origin: left center;
  transition: opacity .2s ease, transform .2s ease;
}
.primary-nav a:hover::after,
.primary-nav a:focus-visible::after { opacity: 1; transform: scaleX(1); }
.site-header .search { display:none; }
@media (min-width: 900px) {
  .primary-nav { display: flex; }
  .site-header .search { display:block; }
  .site-header .search input { width: 480px; padding: 9px 12px; border-radius: 999px; border: 1px solid var(--muted); background: transparent; color: var(--fg); }
  .site-header .search input:focus-visible { outline: 3px solid var(--ring); outline-offset: 2px; }
}

.layout {
  display: grid;
  grid-template-columns: 320px min(720px, 100%) 320px; /* left anno | main | right toc */
  gap: 24px;
  padding: 16px 24px;
  max-width: 1280px;
  margin: 0 auto; /* center container */
}
.post { grid-column: 2; }
.post h1 { font-size: 36px; line-height: 1.25; margin: 0 0 8px; font-weight: 800; }
.post h2 { font-size: 24px; margin: 32px 0 16px; }
.post h3 { font-size: 20px; margin: 28px 0 12px; }
.post p { margin: 16px 0; }
/* Ensure article content paddings live inside the card */
.post.content-card > .content-body { padding: 20px 24px 28px; }

.meta-bar { display:flex; align-items:center; gap: 12px; padding: 0 20px 16px; color: rgba(0,0,0,.7); }
@media (prefers-color-scheme: dark) { .meta-bar { color: rgba(255,255,255,.75); } }
.meta-avatar { width: 40px; height: 40px; border-radius: 999px; background: var(--muted); }
.meta-author { font-weight: 600; }
.meta-dot { opacity:.5; }

.tags { display:flex; gap:8px; flex-wrap: wrap; padding: 0 20px 12px; }
.tag { font-size: 13px; padding: 4px 10px; border-radius: 999px; border: 1px solid transparent; color: var(--fg); background: #e6e8eb; }
@media (prefers-color-scheme: dark) { .tag { background: #1a222c; } }
.tag::before { content: '#'; opacity: .8; margin-right: 2px; }
.tag:hover { background: #eef1ff; /* fallback */ background: color-mix(in oklab, var(--accent) 12%, #e6e8eb); }

.content-card { background: var(--bg-elev); border: 1px solid var(--muted); border-radius: var(--radius-2); box-shadow: var(--shadow-1); overflow: hidden; }
.content-body { padding: 16px 20px 24px; }

/* Feed cards (home) */
.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  padding: 32px;
  background: linear-gradient(130deg, rgba(59,73,223,.12), rgba(59,73,223,.04));
  border-radius: var(--radius-2);
}
.hero__copy { display: flex; flex-direction: column; gap: 12px; }
.hero__eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: 12px; opacity: .75; }
.hero__title { font-size: clamp(28px, 4vw, 42px); margin: 0; line-height: 1.15; }
.hero__lead { font-size: 17px; max-width: 36ch; opacity: .85; }
.hero__actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 8px; }
.hero__stats { display: grid; gap: 16px; align-self: center; }
.stat-card {
  background: rgba(255,255,255,.65);
  border: 1px solid rgba(59,73,223,.15);
  border-radius: var(--radius-2);
  padding: 16px;
  display: flex; flex-direction: column; gap: 4px;
}
@media (prefers-color-scheme: dark) {
  .stat-card { background: rgba(15,21,27,.75); border-color: rgba(138,160,255,.25); }
}
.stat-card__label { font-size: 12px; text-transform: uppercase; letter-spacing: .08em; opacity: .7; }
.stat-card__value { font-size: 28px; font-weight: 700; }
.stat-card__hint { font-size: 13px; opacity: .8; }

.feed-column { display: flex; flex-direction: column; gap: 24px; }
.feed-title { font-size: 28px; margin: 8px 0 8px; line-height: 1.25; }
.feed-title a { color: inherit; text-decoration: none; }
.feed-title a:hover { text-decoration: underline; }
.feed-excerpt { margin: 0 0 16px; opacity: .85; font-size: 15px; }
.feed-grid { display: grid; gap: 20px; }
.feed-card__header { display: flex; align-items: center; justify-content: space-between; padding: 18px 20px 0; gap: 12px; }
.feed-rank { font-weight: 700; font-size: 20px; }
.feed-card__meta { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; opacity: .75; }
.bookmark-btn {
  border: 1px solid transparent;
  background: transparent;
  color: inherit;
  border-radius: 8px;
  display: inline-flex;
  padding: 6px;
  cursor: pointer;
}
.bookmark-btn:hover { background: rgba(59,73,223,.08); }
.feed-card__footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 20px 18px;
  gap: 16px; flex-wrap: wrap;
}
.feed-card__stats { display: inline-flex; gap: 8px; flex-wrap: wrap; }
.feed-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px;
  font-size: 12px;
  border-radius: 999px;
  border: 1px solid rgba(59,73,223,.2);
  background: rgba(59,73,223,.08);
  text-transform: capitalize;
}
.feed-chip--insight { border-color: rgba(0,0,0,.08); background: rgba(0,0,0,.05); }
@media (prefers-color-scheme: dark) {
  .feed-chip--insight { border-color: rgba(255,255,255,.15); background: rgba(255,255,255,.08); }
}
.feed-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 8px;
}
.feed-toolbar__group { display: flex; gap: 8px; flex-wrap: wrap; }
.feed-toolbar__summary { font-size: 13px; opacity: .75; }

.left-rail { grid-column: 1; display: none; }
@media (min-width: 1024px) {
  .left-rail { display: flex; flex-direction: column; gap: 16px; }
  .left-rail .rail-box { position: sticky; top: 96px; display: flex; flex-direction: column; gap: 12px; }
  .rail-btn { display: flex; align-items: center; justify-content: center; width: 44px; height: 44px; border-radius: 12px; border: 1px solid var(--muted); background: var(--bg-elev); cursor: pointer; transition: transform .12s ease, background-color .12s ease, border-color .12s ease; }
  .rail-btn:hover { transform: translateY(-1px); border-color: rgba(59,73,223,.35); background: rgba(59,73,223,.08); }
}
.left-rail-card { border: 1px solid var(--muted); border-radius: var(--radius-2); padding: 16px; background: var(--bg-elev); }
.left-rail-card h3 { margin: 0 0 12px; font-size: 15px; }
.rail-links { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.rail-link { background: transparent; border: none; padding: 0; color: inherit; font: inherit; text-align: left; cursor: pointer; }
.rail-link:hover { text-decoration: underline; }

.sidebar { position: sticky; top: 72px; max-height: calc(100dvh - 96px); overflow: auto; padding: 8px 8px 16px; }
.sidebar-right { grid-column: 3; justify-self: end; width: 320px; }
.sidebar-left { grid-column: 1; justify-self: start; width: 320px; }
.sidebar header { display: flex; align-items: center; justify-content: space-between; position: sticky; top: 0; background: var(--bg-elev); padding: 8px; z-index: 1; }
.sidebar header .controls { display: flex; gap: 8px; }
@media (max-width: 1200px) {
  /* Sidebars become overlays on mobile */
  .layout { grid-template-columns: 1fr min(720px, 100%) 1fr; }
  .sidebar-right { position: fixed; right: 0; top: 0; bottom: 0; width: 360px; transform: translateX(100%); transition: transform .2s ease; background: var(--bg-elev); box-shadow: var(--shadow-1); border-left: 1px solid var(--muted); }
  .sidebar-right.is-open { transform: translateX(0); }
  .sidebar-left { position: fixed; left: 0; top: 0; bottom: 0; width: 360px; transform: translateX(-100%); transition: transform .2s ease; background: var(--bg-elev); box-shadow: var(--shadow-1); border-right: 1px solid var(--muted); }
  .sidebar-left.is-open { transform: translateX(0); }
}
.side-card { border: 1px solid var(--muted); border-radius: var(--radius-2); padding: 16px; margin: 8px; background: var(--bg-elev); }
.side-card .title { font-weight: 600; margin-bottom: 6px; }
.highlight-card { background: linear-gradient(135deg, rgba(59,73,223,.08), rgba(59,73,223,.02)); }
.checklist { list-style: none; margin: 12px 0 0; padding: 0; display: grid; gap: 8px; font-size: 14px; }
.checklist li::before { content: '✓'; margin-right: 6px; color: var(--accent); }
.trend-list { list-style: none; margin: 8px 0 0; padding: 0; display: grid; gap: 8px; font-size: 14px; }
.trend-list a { display: flex; align-items: center; gap: 8px; color: inherit; text-decoration: none; }
.trend-title { flex: 1; }
.newsletter-form { display: flex; flex-direction: column; gap: 10px; }
.newsletter-form input {
  padding: 10px 12px;
  border: 1px solid var(--muted);
  border-radius: 8px;
  background: transparent;
  color: inherit;
}
.newsletter-form input:focus-visible { outline: 3px solid var(--ring); outline-offset: 2px; }
.newsletter-card { background: linear-gradient(140deg, rgba(59,73,223,.14), rgba(59,73,223,.02)); }
.feed-card[data-annotations="0"] .feed-chip--count { opacity: .55; }
.sidebar-backdrop { display:none; }
@media (max-width: 1200px) {
  .sidebar-backdrop { display:block; position: fixed; inset: 0; background: rgba(0,0,0,.3); z-index: 25; opacity: 0; pointer-events: none; transition: opacity .2s ease; }
  .sidebar-backdrop.is-open { opacity: 1; pointer-events: auto; }
}

.btn { padding: 8px 12px; border-radius: 8px; border: 1px solid var(--muted); background: transparent; color: var(--fg); cursor: pointer; }
.btn-primary { background: var(--accent); color: white; border: none; }
.btn-ghost { background: transparent; border: none; color: var(--fg); }
.btn:focus-visible { outline: 3px solid var(--ring); outline-offset: 2px; }
.btn:hover { border-color: #c7d0ff; /* fallback */ border-color: color-mix(in oklab, var(--accent) 35%, var(--muted)); background: #eef1ff; /* fallback */ background: color-mix(in oklab, var(--accent) 8%, transparent); }
.btn:not(.btn-primary):hover { border-color: #c7d0ff; background: #eef1ff; }
.btn-primary:hover { background: var(--accent); color: #fff; filter: brightness(1.05); }
.btn:disabled, .btn[disabled] { opacity: .6; cursor: not-allowed; }
.btn-block { width: 100%; }

[data-scroll-trigger] { cursor: pointer; }

.anno-list { list-style: none; margin: 0; padding: 8px; }
.anno-card {
  border: 1px solid var(--muted);
  border-radius: 10px;
  padding: 16px;
  margin: 12px 0;
  background: var(--bg-elev);
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}
.anno-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 12px rgba(59,73,223,.15);
  transform: translateY(-2px);
}
@media (prefers-color-scheme: dark) {
  .anno-card:hover { box-shadow: 0 4px 12px rgba(138,160,255,.25); }
}
.anno-card.pending { opacity: .85; }
.anno-card__header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.anno-card__icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}
.anno-card__icon--comment { background: #eef1ff; }
.anno-card__icon--question { background: #e9f7f0; }
.anno-card__icon--citation { background: #fff4db; }
.anno-card__icon--critique { background: #ffe9e9; }
.anno-card__icon--praise { background: #f2ebff; }
@media (prefers-color-scheme: dark) {
  .anno-card__icon--comment { background: rgba(138,160,255,.25); }
  .anno-card__icon--question { background: rgba(16,185,129,.25); }
  .anno-card__icon--citation { background: rgba(245,158,11,.25); }
  .anno-card__icon--critique { background: rgba(239,68,68,.25); }
  .anno-card__icon--praise { background: rgba(168,85,247,.25); }
}
.anno-quote {
  font: 12px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace;
  opacity: .85;
  background: rgba(255,234,140,.4);
  background: color-mix(in oklab, var(--hl) 60%, transparent);
  padding: 6px 10px;
  border-radius: 8px;
  border-left: 3px solid var(--accent);
  display: block;
  margin-bottom: 10px;
}
.anno-body {
  line-height: 1.6;
  margin-top: 8px;
}
.anno-card__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--muted);
  font-size: 12px;
  opacity: .75;
}
.anno-card__actions {
  display: flex;
  gap: 6px;
  margin-left: auto;
}
.anno-action {
  background: transparent;
  border: 1px solid transparent;
  color: inherit;
  padding: 4px 8px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: all 0.15s ease;
}
.anno-action:hover {
  background: rgba(59,73,223,.1);
  border-color: rgba(59,73,223,.2);
}
.anno-card.expanded .anno-body {
  max-height: none;
}
.anno-expand-btn {
  background: transparent;
  border: none;
  color: var(--accent);
  padding: 4px 0;
  cursor: pointer;
  font-size: 13px;
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 4px;
}
.anno-expand-btn:hover {
  text-decoration: underline;
}

::highlight(anno) { background-color: var(--hl); }
::highlight(annoFocus) { background-color: var(--hl-focus); text-decoration: underline dotted rgba(0,0,0,.35); }
::highlight(annoOwn) { background-color: var(--hl-own); }

mark.anno { background: var(--hl); border-bottom: 2px dotted rgba(0,0,0,.18); }
mark.anno--fx { background: var(--hl-focus); border-bottom: 2px solid rgba(0,0,0,.28); }
mark.anno--own { background: var(--hl-own); }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* Comments bar (right sidebar) */
.comments { border-top: 1px solid var(--muted); padding: 12px 8px; }
.comment-row {
  display: flex;
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--muted);
  border-radius: var(--radius-2);
  background: var(--bg-elev);
  box-shadow: var(--shadow-1);
  margin: 8px;
}
.comment-avatar {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), rgba(59,73,223,.6));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: 14px;
}
.comment-box { flex: 1; display: flex; flex-direction: column; gap: 10px; }
.comment-input {
  width: 100%;
  min-height: 96px;
  padding: 12px;
  border: 1px solid var(--muted);
  border-radius: var(--radius-2);
  background: transparent;
  color: var(--fg);
  font-family: inherit;
  resize: vertical;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.comment-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59,73,223,.15);
}
@media (prefers-color-scheme: dark) {
  .comment-input:focus { box-shadow: 0 0 0 3px rgba(138,160,255,.25); }
}
.comment-actions { display: flex; gap: 8px; justify-content: flex-end; }
.comment-quote {
  font-size: 13px;
  opacity: .9;
  background: rgba(255,234,140,.35);
  background: color-mix(in oklab, var(--hl) 50%, transparent);
  padding: 6px 10px;
  border-radius: 6px;
  border-left: 3px solid var(--accent);
  font-style: italic;
}
.comment-toolbar {
  display: flex;
  gap: 4px;
  padding: 4px;
  border-bottom: 1px solid var(--muted);
  margin-bottom: 8px;
}
.toolbar-btn {
  background: transparent;
  border: 1px solid transparent;
  color: inherit;
  padding: 6px 8px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.15s ease;
}
.toolbar-btn:hover {
  background: rgba(59,73,223,.1);
  border-color: rgba(59,73,223,.2);
}

/* Comment kind selector + badges */
.comment-kind { border: 1px solid var(--muted); background: var(--bg-elev); color: var(--fg); border-radius: 6px; padding: 4px 6px; }
.badge-kind { display: inline-block; font-size: 11px; line-height: 1; padding: 4px 6px; border-radius: 999px; border: 1px solid var(--muted); background: var(--bg-elev); text-transform: capitalize; }
.badge-comment { border-color: #c7d0ff; background: #eef1ff; }
.badge-question { border-color: #b9decf; background: #e9f7f0; }
.badge-citation { border-color: #f3cf99; background: #fff4db; }
.badge-critique { border-color: #f0b6b6; background: #ffe9e9; }
.badge-praise { border-color: #d2c2f5; background: #f2ebff; }

/* Toast */
.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%);
  background: var(--bg-elev); color: var(--fg); border: 1px solid var(--muted);
  border-radius: var(--radius-2); padding: 10px 14px; box-shadow: var(--shadow-2); z-index: 40; }

/* Keyboard shortcuts */
kbd {
  display: inline-block;
  padding: 2px 6px;
  font-size: 11px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: var(--muted);
  border: 1px solid rgba(0,0,0,.1);
  border-radius: 4px;
  box-shadow: 0 1px 2px rgba(0,0,0,.05);
}

/* Content specifics */
pre { background: rgba(0,0,0,.04); border: 1px solid var(--muted); padding: 12px; border-radius: var(--radius-2); overflow: auto; }
@media (prefers-color-scheme: dark) { pre { background: rgba(255,255,255,.03); } }

/* TOC (right sidebar) */
#toc { display: block; padding: 4px 0; }
#toc .toc-list { list-style: none; margin: 0; padding: 0; }
#toc .toc-item { margin: 2px 0; }
#toc .toc-link { display: block; padding: 6px 8px; border-radius: 6px; color: var(--fg); text-decoration: none; border: 1px solid transparent; }
#toc .toc-link:hover { background: #f5f7ff; /* fallback */ background: color-mix(in oklab, var(--accent) 8%, transparent); }
#toc .toc-link.active { background: #eef1ff; border-color: #c7d0ff; }
#toc .toc-h3 .toc-link { padding-left: 20px; opacity: .9; }

/* Make in-article anchors snap below sticky header */
.post .content-body h2, .post .content-body h3 { scroll-margin-top: 72px; }

/* Post page */
.layout-post { gap: 32px; }
.post-hero { padding: 32px 32px 0; display: flex; flex-direction: column; gap: 14px; background: linear-gradient(180deg, rgba(59,73,223,.12), transparent); }
.post-hero__eyebrow { text-transform: uppercase; letter-spacing: .1em; font-size: 12px; opacity: .7; }
.post-hero__title { margin: 0; font-size: clamp(32px, 5vw, 46px); }
.post-hero__meta { display: flex; align-items: center; gap: 10px; font-size: 14px; opacity: .78; flex-wrap: wrap; }
.post-hero__stats { display: inline-flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.post-cta { margin: 32px 0 0; padding: 28px; border: 1px dashed rgba(59,73,223,.35); border-radius: var(--radius-2); background: rgba(59,73,223,.08); }
.post-cta__title { margin: 0 0 6px; font-size: 22px; }
.post-cta__actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 12px; }
.toolkit-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; font-size: 14px; }
.toolkit-link { color: inherit; text-decoration: none; border: none; background: none; padding: 0; font: inherit; cursor: pointer; }
.toolkit-link:hover { text-decoration: underline; }
.anno-summary { padding: 16px; border-bottom: 1px solid var(--muted); background: var(--bg-elev); }
.anno-summary__title { font-weight: 600; margin-bottom: 4px; }

@media (prefers-color-scheme: dark) {
  .hero { background: linear-gradient(130deg, rgba(138,160,255,.22), rgba(138,160,255,.08)); }
  .newsletter-card { background: linear-gradient(140deg, rgba(138,160,255,.22), rgba(138,160,255,.08)); }
  .post-cta { background: rgba(138,160,255,.12); border-color: rgba(138,160,255,.35); }
}

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .post { grid-column: 1; }
  .sidebar { position: static; max-height: none; width: 100%; }
  .sidebar-right, .sidebar-left { width: 100%; }
  .hero { padding: 24px; }
  .feed-toolbar { flex-direction: column; align-items: flex-start; gap: 12px; }
  .site-header { flex-wrap: wrap; height: auto; padding: 12px 16px; gap: 12px; }
  .site-header .actions { width: 100%; justify-content: flex-end; }
}