/* =============================================================================
   backyes.github.io — Design System v2
   Vikas Goyal style: warm paper + glass morphism + Libre Baskerville
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Libre+Baskerville:ital,wght@0,400;0,700;1,400&family=Manrope:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ---------- Tokens ---------- */
:root {
  /* paper */
  --paper: #f6f3ec;
  --paper-light: #fcfaf6;
  --surface: rgba(255,255,255,0.86);
  --surface-strong: #ffffff;
  --line: rgba(17,17,17,0.12);

  /* ink */
  --ink: #111111;
  --ink-soft: #4d4d4d;
  --ink-mute: #6a6a6a;

  /* accents */
  --green: #0f5d44;
  --green-deep: #0a3f30;
  --green-soft: rgba(15,93,68,0.10);
  --gold: #bf8b2c;
  --gold-soft: rgba(191,139,44,0.14);
  --blue: #163e7a;

  /* card dark shades (for report card visuals) */
  --card-chip: #2e333e;
  --card-network: #2b303a;
  --card-inference: #2a2f38;
  --card-cluster: #2d323c;
  --card-model: #2c313b;
  --card-storage: #2a3038;
  --card-recsys: #2b3138;
  --card-conference: #2d3038;
  --card-space: #2e3138;

  /* typography */
  --font-serif: 'Libre Baskerville', Georgia, serif;
  --font-sans: 'Manrope', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  /* sizing */
  --shadow: 0 24px 60px rgba(17,17,17,0.10);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --content-width: 1200px;
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;line-height:1.7;
  color:var(--ink);
  background:
    radial-gradient(circle at top left, rgba(15,93,68,0.12), transparent 28%),
    radial-gradient(circle at top right, rgba(191,139,44,0.14), transparent 24%),
    linear-gradient(180deg, #fcfaf6 0%, var(--paper) 42%, #ffffff 100%);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
a:hover{text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3,h4{line-height:1.3;letter-spacing:-.02em}

/* ---------- Layout ---------- */
.page-shell{max-width:var(--content-width);margin:0 auto;padding:16px 20px 56px}

/* =====================================================================
   TOPBAR
   ===================================================================== */
.topbar{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-bottom:28px}
.brand{display:flex;flex-direction:column;gap:6px}
.brand-name{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-serif);font-size:1.7rem;font-weight:700;letter-spacing:-.03em;
}
.brand-tagline{font-size:.95rem;color:var(--ink-soft)}
.topnav{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:10px}
.topnav a{
  padding:10px 14px;border:1px solid var(--line);border-radius:999px;
  font-size:.92rem;color:var(--ink-soft);background:rgba(255,255,255,.55);
  transition:transform .2s,border-color .2s,color .2s;
}
.topnav a:hover{color:var(--ink);border-color:rgba(17,17,17,.3);transform:translateY(-1px)}
.topnav a.nav-accent{
  color:#fff;background:linear-gradient(135deg,var(--blue) 0%,var(--green) 100%);
  border-color:transparent;box-shadow:0 12px 26px rgba(22,62,122,.18);
}
.icon-link{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;padding:0;border:1px solid var(--line);border-radius:999px;
  color:var(--ink-soft);background:rgba(255,255,255,.55);
  transition:transform .2s,border-color .2s,color .2s;
}
.icon-link:hover{color:var(--ink);border-color:rgba(17,17,17,.3);transform:translateY(-1px)}
.icon-link svg{width:20px;height:20px;fill:currentColor}
.nav-search-btn{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;padding:0;border:1px solid var(--line);border-radius:999px;
  color:var(--ink-soft);background:rgba(255,255,255,.55);cursor:pointer;
  transition:transform .2s,border-color .2s,color .2s;
}
.nav-search-btn:hover{color:var(--ink);border-color:rgba(17,17,17,.3);transform:translateY(-1px)}

/* =====================================================================
   HERO
   ===================================================================== */
.hero{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(300px,.85fr);gap:24px;align-items:stretch;margin-bottom:26px}
.hero-panel,.hero-aside,.section-card,.path-card,.signal-card,.article-card,.latest-card,.footer-card{
  background:var(--surface);backdrop-filter:blur(10px);
  border:1px solid rgba(255,255,255,.55);box-shadow:var(--shadow);
}
.hero-panel{position:relative;overflow:hidden;border-radius:32px;padding:32px}
.hero-panel::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(15,93,68,.10),transparent 45%),
             linear-gradient(315deg,rgba(191,139,44,.12),transparent 40%);
  pointer-events:none;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  padding:8px 14px;border-radius:999px;
  background:rgba(17,17,17,.05);color:var(--green-deep);
  font-size:.85rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase;margin-bottom:22px;
}
.hero h1{
  position:relative;margin:0 0 14px;
  font-family:var(--font-serif);font-size:clamp(1.9rem,3.8vw,3.4rem);
  line-height:1.12;letter-spacing:-.04em;max-width:14ch;
}
.hero-copy{position:relative;max-width:63ch;font-size:1rem;line-height:1.7;color:var(--ink-soft);margin-bottom:20px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:20px;position:relative}
.button{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:48px;padding:0 20px;border-radius:999px;font-weight:700;
  transition:transform .2s,box-shadow .2s,background .2s;
}
.button-primary{color:#fff;background:linear-gradient(135deg,var(--green) 0%,var(--green-deep) 100%);box-shadow:0 14px 30px rgba(15,93,68,.25)}
.button-secondary{color:var(--ink);background:rgba(255,255,255,.78);border:1px solid var(--line)}
.button:hover{transform:translateY(-2px)}
.hero-metrics{position:relative;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.metric{padding:16px 18px;border-radius:var(--radius-md);background:rgba(255,255,255,.75);border:1px solid rgba(17,17,17,.08)}
.metric-label{display:block;font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-soft);margin-bottom:8px}
.metric strong{font-size:1rem;line-height:1.4}
.hero-aside{border-radius:28px;padding:22px;display:flex;flex-direction:column;gap:18px}
.aside-kicker{font-size:.85rem;font-weight:800;text-transform:uppercase;letter-spacing:.06em;color:var(--green-deep);margin:0}
.aside-title{font-family:var(--font-serif);font-size:1.55rem;line-height:1.25;margin:0}
.aside-text{margin:0;color:var(--ink-soft);line-height:1.75}
.aside-list{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.aside-list li{padding:14px;border-radius:var(--radius-md);background:rgba(17,17,17,.03);border:1px solid rgba(17,17,17,.06)}
.aside-list span{display:block;font-size:.78rem;font-weight:800;text-transform:uppercase;letter-spacing:.06em;color:var(--gold);margin-bottom:6px}
.aside-list a{font-weight:700;color:var(--blue);text-decoration:none;transition:color .15s}
.aside-list a:hover{color:var(--green);text-decoration:underline}
.aside-list small{color:var(--ink-soft);font-size:.85rem;line-height:1.5}

/* =====================================================================
   SIGNAL GRID
   ===================================================================== */
.signal-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:18px}
.signal-card{border-radius:18px;padding:18px}
.signal-card strong{display:block;font-size:1.1rem;margin-bottom:8px}
.signal-card p{margin:0;color:var(--ink-soft);line-height:1.65;font-size:.95rem}

/* =====================================================================
   SECTION CARD
   ===================================================================== */
.section-card{border-radius:28px;padding:22px;margin-bottom:18px}
.section-heading{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:24px}
.section-heading h2{margin:0;font-family:var(--font-serif);font-size:clamp(1.7rem,2.2vw,2.35rem);letter-spacing:-.03em}
.section-heading p{margin:0;max-width:55ch;color:var(--ink-soft);line-height:1.7}

/* =====================================================================
   ARTICLE CARD (Featured Reports)
   ===================================================================== */
.featured-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.article-card{display:flex;flex-direction:column;gap:12px;border-radius:20px;padding:20px;min-height:100%}
.article-tag{display:inline-flex;width:fit-content;padding:7px 12px;border-radius:999px;font-size:.78rem;font-weight:800;text-transform:uppercase;letter-spacing:.06em;background:var(--green-soft);color:var(--green-deep)}
.article-card h3{margin:0;font-size:1.25rem;line-height:1.35}
.article-card p{margin:0;color:var(--ink-soft);line-height:1.7}
.article-link{margin-top:auto;font-weight:800;color:var(--blue)}

/* =====================================================================
   PATH CARDS
   ===================================================================== */
.paths-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.path-card{border-radius:22px;padding:22px}
.path-card h3{margin:0 0 10px;font-size:1.15rem}
.path-card p{margin:0 0 16px;color:var(--ink-soft);line-height:1.7;font-size:.95rem}
.path-links{display:grid;gap:10px}
.path-links a{color:var(--blue);font-weight:700}

/* =====================================================================
   TWO-UP
   ===================================================================== */
.two-up{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(320px,.85fr);gap:20px;margin-bottom:26px}

/* =====================================================================
   LATEST CARD
   ===================================================================== */
.latest-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.latest-card{border-radius:18px;padding:18px;min-height:180px}
.latest-card time{display:block;font-size:.82rem;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-soft);margin-bottom:10px;font-family:var(--font-mono)}
.latest-card h3{margin:0 0 12px;font-size:1.08rem;line-height:1.45}
.latest-card p{margin:0;color:var(--ink-soft);line-height:1.7;font-size:.94rem}

/* =====================================================================
   NEWSLETTER PANEL
   ===================================================================== */
.newsletter-panel{
  display:grid;grid-template-columns:minmax(0,.95fr) minmax(320px,1.05fr);
  gap:24px;align-items:center;padding:34px;
  background:linear-gradient(135deg,rgba(22,62,122,.08),rgba(15,93,68,.12)),rgba(255,255,255,.82);
}
.newsletter-copy h2{margin:0;font-family:var(--font-serif);font-size:clamp(1.85rem,2.4vw,2.6rem);line-height:1.2;letter-spacing:-.03em}
.newsletter-copy p{margin:0;color:var(--ink-soft);line-height:1.8;max-width:52ch}
.newsletter-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.newsletter-meta span{
  display:inline-flex;align-items:center;padding:9px 14px;border-radius:999px;
  background:rgba(255,255,255,.72);border:1px solid rgba(17,17,17,.08);
  font-size:.88rem;font-weight:700;color:var(--green-deep);
}

/* =====================================================================
   FOOTER
   ===================================================================== */
.footer-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:20px}
.footer-card{border-radius:26px;padding:24px}
.footer-card h2,.footer-card h3{margin:0 0 12px}
.footer-card p{margin:0;color:var(--ink-soft);line-height:1.7}
.footer-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}
.footer-links a{padding:10px 14px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.7);font-weight:700}
.note{font-size:.9rem}

/* =====================================================================
   SURVEY BY AI — Report Cards (adapted to light theme)
   ===================================================================== */
.grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px;
}
.card{
  display:flex;flex-direction:column;
  background:var(--surface);backdrop-filter:blur(10px);
  border:1px solid rgba(255,255,255,.55);border-radius:var(--radius-md);
  overflow:hidden;transition:transform .25s,border-color .25s,box-shadow .25s;
  box-shadow:var(--shadow);
}
.card:hover{transform:translateY(-4px);box-shadow:0 10px 30px rgba(17,17,17,.15)}
.card-img{height:160px;position:relative;overflow:hidden}
.card-img .visual{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-size:clamp(1.8rem,3.5vw,2.6rem);font-weight:600;letter-spacing:-.02em;
  color:rgba(255,255,255,.55);line-height:1.1;padding:16px;text-align:center;
}
.card-img .tag{
  position:absolute;top:12px;left:12px;padding:4px 10px;border-radius:999px;
  background:rgba(46,51,62,.85);backdrop-filter:blur(6px);
  font-size:.72rem;font-weight:600;border:1px solid rgba(255,255,255,.15);color:rgba(255,255,255,.85);
}
.card-body{padding:14px 18px 18px;flex:1;display:flex;flex-direction:column}
.card-body h3{margin:0 0 8px;font-size:1.08rem;font-weight:600;line-height:1.35}
.card-body p{margin:0;color:var(--ink-soft);font-size:.87rem;line-height:1.6;flex:1}
.card-foot{display:flex;align-items:center;justify-content:space-between;margin-top:14px;padding-top:12px;border-top:1px solid var(--line);font-size:.77rem;color:var(--ink-mute)}
.card-foot .more{color:var(--blue);font-weight:600}
.card-foot .report-link{color:var(--blue);font-weight:600;text-decoration:none;padding:4px 10px;border:1px solid var(--blue);border-radius:4px;font-size:.78rem;transition:all .2s}
.card-foot .report-link:hover{background:var(--blue);color:#fff}
.card:hover .more{gap:7px}

/* tag color helpers — all neutral in light theme */
.tag-inference,.tag-model,.tag-network,.tag-chip,.tag-cluster,.tag-storage,.tag-recsys,.tag-conference,.tag-space{color:var(--ink-soft)}

/* =====================================================================
   POSTS LIST (Lil'Log style adapted to light theme)
   ===================================================================== */
.posts-list{list-style:none;margin:0;padding:0}
.posts-item{
  display:grid;grid-template-columns:120px 1fr;gap:28px;
  padding:22px 0;border-bottom:1px solid var(--line);align-items:baseline;min-width:0;
}
.posts-content{min-width:0;overflow:hidden}
.posts-item:last-child{border-bottom:none}
.posts-date{font-family:var(--font-mono);font-size:.82rem;color:var(--ink-mute);padding-top:4px}
.posts-content h3{margin:0 0 6px;font-size:1.18rem;font-weight:600;font-family:var(--font-serif);line-height:1.35}
.posts-content h3 a{transition:color .2s}
.posts-content h3 a:hover{color:var(--blue)}
.posts-excerpt{color:var(--ink-soft);font-size:.92rem;line-height:1.65;margin:0;font-family:var(--font-serif);overflow-wrap:break-word;word-break:break-word}
.posts-meta{display:flex;gap:10px;align-items:center;margin-top:8px;font-size:.78rem;color:var(--ink-mute)}
.posts-meta .ptag,.meta .ptag{
  padding:2px 9px;border-radius:999px;
  background:rgba(255,255,255,.7);border:1px solid var(--line);color:var(--ink-soft);margin-right:6px;
}
.meta .ptag:last-child{margin-right:0}

/* Empty state */
.empty{text-align:center;padding:64px 24px;color:var(--ink-soft);font-family:var(--font-serif);border:1px dashed var(--line);border-radius:var(--radius-md)}
.empty .emoji{font-size:2.4rem;margin-bottom:12px;opacity:.6}
.empty p{max-width:440px;margin:0 auto;line-height:1.7}

/* =====================================================================
   TAGS PAGE
   ===================================================================== */
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:48px}
.tag-pill{padding:8px 18px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.7);font-size:.9rem;transition:all .2s}
.tag-pill:hover{border-color:var(--blue);color:var(--blue)}
.tag-pill .count{color:var(--ink-mute);font-size:.8rem;margin-left:6px}

.tags-layout{display:grid;grid-template-columns:200px 1fr;gap:48px;align-items:start}
.tags-sidebar{position:sticky;top:24px}
.tags-sidebar h3{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-mute);margin:0 0 14px;font-weight:600}
.tags-sidebar ul{list-style:none;margin:0;padding:0}
.tags-sidebar li{margin:0}
.tags-sidebar a{display:flex;align-items:center;justify-content:space-between;padding:7px 0;border-bottom:1px solid var(--line);font-size:.92rem;color:var(--ink-soft);transition:color .15s}
.tags-sidebar a:hover{color:var(--blue)}
.tags-sidebar a .cnt{font-family:var(--font-mono);font-size:.78rem;color:var(--ink-mute)}

.tag-group{margin-bottom:52px}
.tag-group h3{font-size:1.3rem;margin:0 0 20px;display:flex;align-items:center;gap:10px;padding-bottom:14px;border-bottom:1px solid var(--line);font-family:var(--font-serif);font-weight:600}
.tag-group h3 .hash{color:var(--green);font-family:var(--font-mono);font-size:1.1rem}
.tag-group h3 .cnt{color:var(--ink-mute);font-family:var(--font-mono);font-size:.82rem;font-weight:400}
.tag-group .posts-item{grid-template-columns:1fr;gap:8px;padding:14px 0}
.tag-group .posts-content h3{font-size:1.05rem}
.tag-group .posts-excerpt{font-size:.88rem}

/* =====================================================================
   SEARCH OVERLAY
   ===================================================================== */
.search-overlay{position:fixed;inset:0;z-index:9999;background:rgba(246,243,236,.92);backdrop-filter:blur(8px);display:none;align-items:flex-start;justify-content:center;padding-top:12vh}
.search-overlay.open{display:flex}
.search-box{width:min(620px,92vw);background:var(--surface-strong);border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow);overflow:hidden}
.search-box input{width:100%;padding:18px 22px;background:transparent;border:none;outline:none;color:var(--ink);font-size:1.1rem;font-family:var(--font-sans)}
.search-box input::placeholder{color:var(--ink-mute)}
.search-results{max-height:50vh;overflow-y:auto;padding:8px 0}
.search-results a{display:block;padding:12px 22px;border-bottom:1px solid var(--line);transition:background .15s}
.search-results a:hover{background:rgba(255,255,255,.6)}
.search-results a h4{margin:0 0 4px;font-size:.95rem;font-weight:600}
.search-results a p{margin:0;font-size:.82rem;color:var(--ink-soft);line-height:1.4}
.search-hint{padding:14px 22px;font-size:.78rem;color:var(--ink-mute);border-top:1px solid var(--line)}

/* =====================================================================
   ARTICLE PAGE (post reading experience)
   ===================================================================== */
.article-layout{display:flex;gap:32px;max-width:1160px;margin:0 auto;padding:0 32px}
.toc-sidebar{flex:0 0 220px;position:sticky;top:24px;align-self:flex-start;padding:40px 0;max-height:100vh;overflow-y:auto}
.toc{font-size:.82rem}
.toc-title{font-weight:600;color:var(--ink-mute);text-transform:uppercase;letter-spacing:.05em;margin-bottom:12px;font-size:.75rem}
.toc ul{list-style:none;padding:0;margin:0;border-left:2px solid var(--line)}
.toc li{margin:0}
.toc a{display:block;padding:6px 0 6px 14px;color:var(--ink-soft);text-decoration:none;border-left:2px solid transparent;margin-left:-2px;transition:all .15s}
.toc a:hover{color:var(--ink);border-left-color:var(--green)}
.toc a.toc-h2{font-weight:500}
.toc a.toc-h3{font-size:.78px;padding-left:24px;color:var(--ink-mute)}
.toc a.toc-h3:hover{color:var(--ink-soft)}
.article{flex:1;max-width:960px;padding:40px 0 80px;min-width:0}
.article h1{font-family:var(--font-serif);font-size:2rem;font-weight:700;margin:0 0 8px}
.article .meta{color:var(--ink-mute);font-size:.85rem;margin-bottom:40px;padding-bottom:20px;border-bottom:1px solid var(--line);display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.article-body{font-family:var(--font-serif);font-size:1.1rem;line-height:1.85;color:var(--ink)}
.article-body h2{font-size:1.5rem;font-weight:700;margin:2em 0 .6em;padding-bottom:.4em;border-bottom:2px solid var(--green);color:var(--ink)}
.article-body h3{font-size:1.25rem;font-weight:600;margin:1.5em 0 .5em;padding-left:10px;border-left:3px solid var(--green);color:var(--ink)}
.article-body p{margin:0 0 1.2em}
.article-body strong{color:var(--ink);font-weight:600}
.article-body mark{background:linear-gradient(180deg,transparent 60%,var(--gold-soft) 60%);padding:0 3px;color:var(--ink);font-weight:600}
.article-body .key-callout{border-left:4px solid var(--green);background:var(--green-soft);padding:14px 20px;margin:1.5em 0;border-radius:0 8px 8px 0}
.article-body .key-callout p{margin:0 0 .5em}
.article-body .key-callout p:last-child{margin:0}
.article-body .key-num{color:var(--blue);font-weight:700;font-size:1.1em}
.article-body .hl-blue{background:rgba(22,62,122,.06);border-left:3px solid var(--blue);padding:10px 16px;margin:1.2em 0;border-radius:0 6px 6px 0}
.article-body .hl-amber{background:var(--gold-soft);border-left:3px solid var(--gold);padding:10px 16px;margin:1.2em 0;border-radius:0 6px 6px 0}
.article-body .hl-green{background:var(--green-soft);border-left:3px solid var(--green);padding:10px 16px;margin:1.2em 0;border-radius:0 6px 6px 0}
.article-body .hl-blue p,.article-body .hl-amber p,.article-body .hl-green p{margin:0}
.article-body table{border-collapse:separate;border-spacing:0;width:100%;margin:1.5em 0;font-size:.88em;display:block;overflow-x:auto;border:1px solid var(--line);border-radius:8px}
.article-body th{background:rgba(15,93,68,.05);font-weight:600;padding:10px 12px;border-bottom:2px solid rgba(15,93,68,.2);text-align:left;font-size:.85em;text-transform:uppercase;letter-spacing:.03em;color:var(--ink)}
.article-body td{padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.5}
.article-body tr:last-child td{border-bottom:none}
.article-body tr:nth-child(even) td{background:rgba(255,255,255,.5)}
.article-body tr:hover td{background:rgba(15,93,68,.04)}
.article-body thead th{position:sticky;top:0}
.article-body blockquote{border-left:4px solid var(--green);background:var(--green-soft);padding:10px 16px;margin:1.2em 0;border-radius:0 6px 6px 0}
.article-body blockquote p{margin:0}
.article-body code{background:rgba(255,255,255,.8);border:1px solid var(--line);padding:1px 5px;border-radius:4px;font-size:.85em;font-family:var(--font-mono)}
.article-body pre code{background:none;border:none;padding:0}
.article-body a{color:var(--blue);text-decoration:none}
.article-body a:hover{text-decoration:underline}
.article-body hr{border:none;border-top:1px solid var(--line);margin:2em 0}
.back{display:inline-block;margin-bottom:28px;color:var(--blue);font-size:.9rem}

/* =====================================================================
   RESPONSIVE
   ===================================================================== */
@media(max-width:1080px){
  .hero,.two-up,.footer-grid,.newsletter-panel{grid-template-columns:1fr}
  .signal-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .featured-grid,.paths-grid,.latest-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media(max-width:720px){
  .page-shell{padding:16px 14px 48px}
  .topbar,.section-heading{flex-direction:column;align-items:flex-start}
  .nav-hide-mobile{display:none}
  .hero-panel,.hero-aside,.section-card,.footer-card{padding:22px}
  .newsletter-panel{padding:22px}
  .hero-metrics,.signal-grid,.featured-grid,.paths-grid,.latest-grid{grid-template-columns:1fr}
  .hero h1{max-width:none}
  .grid{grid-template-columns:1fr}
  .posts-item{display:block;padding:14px 0}
  .posts-date{padding-top:0;font-size:.72rem;margin-bottom:2px}
  .posts-content h3{font-size:.95rem;line-height:1.35;margin-bottom:4px}
  .posts-excerpt{font-size:.85rem;margin-bottom:6px}
  .posts-meta{gap:6px}
  .posts-meta .ptag{font-size:.7rem;padding:2px 7px}
  .tags-layout{grid-template-columns:1fr;gap:24px}
  .tags-sidebar{position:static;margin-bottom:32px}
  .article-layout{padding:0 16px}
  .toc-sidebar{display:none}
  .article{padding:24px 0 60px}
  .article-body h2{font-size:1.3rem}
  .article-body h3{font-size:1.1rem}
  .article-body table{font-size:.8rem}
  .article-body th,.article-body td{padding:6px 8px}
}

/* =====================================================================
   FILTER TABS (for Survey by AI section)
   ===================================================================== */
.filter-bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:28px}
.filter-tab{
  padding:6px 16px;border-radius:999px;border:1px solid var(--line);
  background:rgba(255,255,255,.6);color:var(--ink-soft);font-size:.84rem;font-weight:500;
  cursor:pointer;transition:all .2s;
}
.filter-tab:hover{border-color:var(--green);color:var(--ink)}
.filter-tab.active{background:var(--green);color:#fff;border-color:var(--green)}

/* =====================================================================
   SECTION / PAGE TITLE
   ===================================================================== */
.page-title{
  font-family:var(--font-serif);font-size:clamp(2rem,4vw,3rem);
  font-weight:700;letter-spacing:-.03em;margin:0 0 8px;
}
.page-subtitle{color:var(--ink-soft);font-size:1.05rem;margin:0 0 36px;max-width:60ch}

/* =====================================================================
   MISC
   ===================================================================== */
hr{border:none;border-top:1px solid var(--line);margin:2em 0}