/* =========================================================================
   二〇四〇 — design system
   A crypto-native, two-theme stylesheet. Dark by default; tokens via CSS
   custom props so the theme toggle is a one-attribute flip on <html>.
   ========================================================================= */

:root {
  --font-display: "Space Grotesk", "Inter", system-ui, -apple-system, sans-serif;
  --font-body:    "Inter", system-ui, -apple-system, "PingFang SC",
                  "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --radius-sm: 6px;
  --radius:    12px;
  --radius-lg: 18px;
  --radius-xl: 28px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.08);
  --shadow:    0 10px 30px -10px rgba(0,0,0,.35);
  --shadow-lg: 0 30px 80px -30px rgba(0,0,0,.55);

  --transition: 200ms cubic-bezier(.2,.7,.2,1);

  --container: 80rem;
  --container-narrow: 48rem;
}

/* -------- Dark theme (default) -------------------------------------------- */
html[data-theme="dark"] {
  --bg:           #050714;
  --bg-elev:      #0a0e1f;
  --surface:      rgba(17, 22, 43, 0.72);
  --surface-hi:   rgba(24, 30, 56, 0.85);
  --border:       rgba(120, 134, 200, 0.14);
  --border-strong:rgba(140, 158, 230, 0.28);
  --text:         #e6ecf8;
  --text-soft:    #b5bdd6;
  --text-mute:    #7c849c;
  --accent:       #00f5d4;
  --accent-2:     #b829ff;
  --accent-3:     #ffb86b;
  --link:         #7ee8ff;
  --code-bg:      rgba(0, 245, 212, 0.06);
  --code-border:  rgba(0, 245, 212, 0.18);
  --selection-bg: rgba(0, 245, 212, .25);
  --grid:         rgba(120, 134, 200, 0.08);
  --glow-a:       radial-gradient(closest-side, rgba(0,245,212,.22), transparent 70%);
  --glow-b:       radial-gradient(closest-side, rgba(184,41,255,.22), transparent 70%);
  --gradient:     linear-gradient(135deg, #00f5d4 0%, #7c5cff 50%, #b829ff 100%);
  --gradient-soft:linear-gradient(135deg, rgba(0,245,212,.15), rgba(184,41,255,.15));
}

/* -------- Light theme ----------------------------------------------------- */
html[data-theme="light"] {
  --bg:           #f5f7fb;
  --bg-elev:      #ffffff;
  --surface:      rgba(255, 255, 255, 0.78);
  --surface-hi:   #ffffff;
  --border:       rgba(15, 23, 42, 0.08);
  --border-strong:rgba(15, 23, 42, 0.16);
  --text:         #0a0f1f;
  --text-soft:    #344256;
  --text-mute:    #6b7385;
  --accent:       #0a9d8a;
  --accent-2:     #7c3aed;
  --accent-3:     #d97706;
  --link:         #0e7490;
  --code-bg:      #f3f7f9;
  --code-border:  rgba(10, 157, 138, 0.18);
  --selection-bg: rgba(10, 157, 138, .18);
  --grid:         rgba(15, 23, 42, 0.05);
  --glow-a:       radial-gradient(closest-side, rgba(10,157,138,.18), transparent 70%);
  --glow-b:       radial-gradient(closest-side, rgba(124,58,237,.16), transparent 70%);
  --gradient:     linear-gradient(135deg, #0a9d8a 0%, #4f46e5 50%, #7c3aed 100%);
  --gradient-soft:linear-gradient(135deg, rgba(10,157,138,.12), rgba(124,58,237,.12));
}

/* ========================================================================= */
/* Reset & base                                                              */
/* ========================================================================= */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "cv01";
  transition: background var(--transition), color var(--transition);
}
::selection { background: var(--selection-bg); }

/* Bilingual content swap — both languages ship in HTML for SEO, CSS shows
   the one matching <html data-lang>. Toggling is one attribute flip. */
html[data-lang="en"] .lang-zh,
html:not([data-lang="zh"]) .lang-zh { display: none !important; }
html[data-lang="zh"] .lang-en      { display: none !important; }

.lead { font-size: 1.1rem; color: var(--text); margin: 0 0 1rem; }
img, svg { max-width: 100%; height: auto; vertical-align: middle; }
a { color: var(--link); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
button { font-family: inherit; }
hr { border: 0; height: 1px; background: var(--border); margin: 3rem 0; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}
@media (min-width: 768px) { .container { padding: 0 2rem; } }

.muted { color: var(--text-mute); }
.small { font-size: .8125rem; }
.mono  { font-family: var(--font-mono); letter-spacing: -.01em; }

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
}
.skip-link:focus {
  left: 1rem; top: 1rem; z-index: 100;
  background: var(--bg-elev); color: var(--text);
  padding: .5rem .75rem; border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

/* ========================================================================= */
/* Background FX                                                             */
/* ========================================================================= */
.bg-fx {
  position: fixed; inset: 0; z-index: -1; overflow: hidden;
  pointer-events: none;
}
.bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 30%, transparent 80%);
}
.bg-glow {
  position: absolute;
  width: 60vmax; height: 60vmax;
  border-radius: 50%;
  filter: blur(60px);
  opacity: .9;
  animation: float 22s ease-in-out infinite alternate;
}
.bg-glow-a { top: -20vmax; left: -10vmax; background: var(--glow-a); }
.bg-glow-b { bottom: -25vmax; right: -15vmax; background: var(--glow-b); animation-duration: 30s; }
.bg-noise {
  position: absolute; inset: 0; opacity: .03; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
@keyframes float {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(4vmax, 3vmax, 0) scale(1.1); }
}
@media (prefers-reduced-motion: reduce) {
  .bg-glow { animation: none; }
}

/* ========================================================================= */
/* Header / nav                                                              */
/* ========================================================================= */
.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px) saturate(150%);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  background: color-mix(in oklab, var(--bg) 75%, transparent);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; gap: 1rem;
  height: 64px;
}
.brand {
  display: inline-flex; align-items: center; gap: .65rem;
  color: var(--text); font-weight: 700;
}
.brand:hover { color: var(--text); }
.brand-mark {
  position: relative;
  width: 28px; height: 28px;
  border-radius: 8px;
  background: var(--gradient);
  display: inline-block;
  box-shadow: 0 0 0 1px var(--border-strong), 0 10px 30px -10px var(--accent);
}
.brand-mark-inner {
  position: absolute; inset: 4px;
  border-radius: 5px;
  background: var(--bg-elev);
  background-image:
    linear-gradient(135deg, transparent 40%, color-mix(in oklab, var(--accent) 60%, transparent) 70%),
    linear-gradient(0deg, var(--bg-elev), var(--bg-elev));
}
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-name { font-family: var(--font-display); font-size: 1.05rem; }
.brand-tag  { font-family: var(--font-mono); font-size: .68rem; color: var(--text-mute); margin-top: 3px; letter-spacing: .03em; }

.site-nav { margin-left: auto; }
.nav-list {
  display: flex; gap: .25rem; list-style: none; margin: 0; padding: 0;
}
.nav-link {
  display: inline-flex; align-items: center;
  padding: .5rem .8rem;
  border-radius: 999px;
  color: var(--text-soft);
  font-size: .92rem; font-weight: 500;
}
.nav-link:hover { color: var(--text); background: var(--surface); }
.nav-link.is-active {
  color: var(--text);
  background: var(--surface-hi);
  box-shadow: inset 0 0 0 1px var(--border-strong);
}

.toolbar { display: flex; align-items: center; gap: .4rem; }
.icon-btn {
  display: inline-flex; align-items: center; gap: .35rem;
  height: 38px; padding: 0 .7rem;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-soft);
  cursor: pointer;
  transition: all var(--transition);
}
.icon-btn:hover {
  color: var(--text);
  border-color: var(--border-strong);
  background: var(--surface-hi);
}
.icon-btn:active { transform: translateY(1px); }
.icon-btn-label { font-family: var(--font-mono); font-size: .78rem; }
.icon { width: 18px; height: 18px; flex: none; }
.icon-sm { width: 14px; height: 14px; }

/* Theme icons swap */
html[data-theme="dark"]  .icon-sun  { display: inline; }
html[data-theme="dark"]  .icon-moon { display: none; }
html[data-theme="light"] .icon-sun  { display: none; }
html[data-theme="light"] .icon-moon { display: inline; }

/* Mobile burger */
.nav-burger { display: none; }
.nav-burger span {
  display: block; width: 16px; height: 1.5px; background: currentColor;
  margin: 3px 0; border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(4.5px) rotate(45deg); }
.nav-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-4.5px) rotate(-45deg); }

.mobile-nav {
  display: none;
  border-top: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg) 90%, transparent);
}
.mobile-nav.is-open { display: block; }
.mobile-nav ul { list-style: none; margin: 0; padding: .75rem 1rem 1.25rem; display: grid; gap: .25rem; }
.mobile-nav a {
  display: block; padding: .65rem .75rem;
  border-radius: var(--radius-sm); color: var(--text-soft); font-weight: 500;
}
.mobile-nav a:hover { color: var(--text); background: var(--surface); }

@media (max-width: 820px) {
  .site-nav { display: none; }
  .nav-burger { display: inline-flex; }
}

/* ========================================================================= */
/* Main layout                                                               */
/* ========================================================================= */
.site-main { padding: 3rem 0 5rem; min-height: 60vh; }
.is-post .site-main { padding-top: 2.5rem; }
.page-head {
  margin: 0 0 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.page-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin: 0 0 .5rem;
  letter-spacing: -.02em;
}
.page-sub { font-size: 1.05rem; margin: 0; max-width: 56ch; }

/* ========================================================================= */
/* Home — hero                                                               */
/* ========================================================================= */
.hero {
  position: relative;
  padding: 3.5rem 0 4rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 3rem;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: 3.5rem;
  align-items: center;
}
.hero-content { min-width: 0; }
.hero-aside   { min-width: 0; }

@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}

.hero-eyebrow {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .35rem .7rem .35rem .55rem;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: .76rem;
  color: var(--text-soft);
  text-transform: uppercase; letter-spacing: .1em;
}
.hero-eyebrow::before {
  content: "";
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: .35; }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5.5vw, 4.25rem);
  line-height: 1.05;
  letter-spacing: -.025em;
  margin: 1.25rem 0 1.25rem;
  max-width: 22ch;
}
.hero-title .grad {
  background: var(--gradient);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero-sub {
  font-size: 1.1rem;
  color: var(--text-soft);
  max-width: 60ch;
  margin: 0 0 2rem;
}
.hero-ctas { display: flex; gap: .75rem; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .8rem 1.15rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: .95rem;
  border: 1px solid transparent;
  cursor: pointer; transition: all var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: var(--gradient);
  color: #04060e;
  box-shadow: 0 10px 30px -10px var(--accent);
}
html[data-theme="light"] .btn-primary { color: #fff; }
.btn-primary:hover { color: #04060e; transform: translateY(-1px); box-shadow: 0 20px 40px -15px var(--accent); }
html[data-theme="light"] .btn-primary:hover { color: #fff; }
.btn-ghost {
  background: var(--surface);
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover { color: var(--text); background: var(--surface-hi); border-color: var(--text-soft); }

/* Stats card — sits in the hero-aside on desktop as a vertical stack,
   collapses to a horizontal strip on tablets, then single-column on phones. */
.stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--border);
}
.stat {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 1.25rem;
  padding: 1.35rem 1.65rem;
  background: var(--bg-elev);
}
.stat-num {
  font-family: var(--font-display);
  font-size: 2rem; font-weight: 700;
  line-height: 1;
  background: var(--gradient);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-key {
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--text-mute);
  text-transform: uppercase;
  letter-spacing: .1em;
  text-align: right;
}

@media (max-width: 960px) {
  .stats { grid-template-columns: repeat(3, 1fr); }
  .stat {
    grid-template-columns: 1fr;
    gap: .35rem;
    padding: 1.25rem 1.5rem;
  }
  .stat-num { font-size: 1.75rem; }
  .stat-key { text-align: left; }
}

@media (max-width: 640px) {
  .stats { grid-template-columns: 1fr; }
  .stat { grid-template-columns: auto 1fr; gap: 1rem; }
  .stat-key { text-align: right; }
  .hero { padding: 2.5rem 0 3rem; }
}

/* ========================================================================= */
/* Showcase sections (// 01 Products, // 02 Community on the homepage)       */
/* ========================================================================= */
.showcase {
  margin: 4rem 0 5rem;
}
.showcase + .showcase { margin-top: 5rem; }

.showcase-head {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  row-gap: .5rem;
  margin-bottom: 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
}
.showcase-eyebrow {
  grid-column: 1 / -1;
  font-size: .8rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  text-shadow: 0 0 18px color-mix(in oklab, var(--accent) 70%, transparent);
}
.showcase-title {
  grid-column: 1;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  letter-spacing: -.02em;
  line-height: 1.1;
  margin: 0;
}
.showcase-meta {
  grid-column: 2;
  font-size: .78rem;
  color: var(--text-mute);
  letter-spacing: .04em;
  white-space: nowrap;
}

@media (max-width: 640px) {
  .showcase-head { grid-template-columns: 1fr; }
  .showcase-meta { grid-column: 1; }
}

/* Card grid (3-up for products, 1-up wide for community) */
.card-grid {
  list-style: none; padding: 0; margin: 0;
  display: grid; gap: 1.5rem;
}
.card-grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card-grid-wide { grid-template-columns: 1fr; }

@media (max-width: 960px) { .card-grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .card-grid { gap: 1.25rem; } }
@media (max-width: 640px) { .card-grid-3 { grid-template-columns: 1fr; } }

.showcase-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 1.75rem 1.75rem 1.6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(160deg, color-mix(in oklab, var(--accent) 6%, transparent) 0%, transparent 55%),
    var(--bg-elev);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  overflow: hidden;
}
.showcase-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(140deg, color-mix(in oklab, var(--accent) 40%, transparent), transparent 60%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
  opacity: .55;
}
.showcase-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
}
.showcase-card-wide {
  padding: 2rem 2.25rem;
}

.pill {
  display: inline-flex; align-items: center; gap: .4rem;
  align-self: flex-start;
  padding: .25rem .6rem .25rem .55rem;
  border-radius: 999px;
  border: 1px solid color-mix(in oklab, var(--accent) 45%, transparent);
  background: color-mix(in oklab, var(--accent) 8%, transparent);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  margin-bottom: 1.1rem;
}
.pill-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}

/* Card head — flex row holding the optional pill (left) and X badge (right) */
.card-head {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: 1.1rem;
}
.card-head .pill { margin-bottom: 0; }
.card-head .card-x { margin-left: auto; }

.card-x {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-soft);
  transition: all var(--transition);
  flex: none;
}
.card-x:hover {
  color: var(--text);
  background: var(--surface-hi);
  border-color: var(--border-strong);
  transform: translateY(-1px);
}
.card-x .icon { width: 14px; height: 14px; }

.card-title {
  font-family: var(--font-display);
  font-size: 1.45rem;
  letter-spacing: -.015em;
  margin: 0 0 .3rem;
  color: var(--text);
}
.showcase-card-wide .card-title { font-size: 1.85rem; }
.card-domain {
  font-size: .82rem;
  color: var(--text-mute);
  margin-bottom: 1rem;
}
.card-desc {
  color: var(--text-soft);
  font-size: .95rem;
  line-height: 1.6;
  margin: 0 0 1.2rem;
  flex: 1;
}
.showcase-card-wide .card-desc { max-width: 65ch; font-size: 1rem; }

.card-cta {
  align-self: flex-start;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: .85rem;
  letter-spacing: .03em;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), color var(--transition);
}
.card-cta:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ========================================================================= */
/* Post list                                                                 */
/* ========================================================================= */
.section-head {
  display: flex; align-items: end; justify-content: space-between;
  margin: 2.5rem 0 1.25rem;
  gap: 1rem;
}
.section-head h2 {
  font-family: var(--font-display);
  font-size: 1.5rem; margin: 0; letter-spacing: -.01em;
}
.section-head .muted { font-family: var(--font-mono); font-size: .85rem; }

.post-list {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: 0;
  border-top: 1px solid var(--border);
}
.post-row {
  display: grid;
  grid-template-columns: 7.5rem 1fr auto;
  gap: 1rem;
  align-items: baseline;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
  transition: padding var(--transition);
}
.post-row a {
  color: var(--text);
  display: contents;
}
.post-row .post-date { font-family: var(--font-mono); font-size: .85rem; color: var(--text-mute); }
.post-row .post-title {
  font-size: 1.05rem; font-weight: 600;
  line-height: 1.4;
  transition: color var(--transition);
}
.post-row .post-cat {
  font-family: var(--font-mono); font-size: .72rem;
  color: var(--text-mute);
  border: 1px solid var(--border);
  padding: .15rem .5rem;
  border-radius: 999px;
}
.post-row:hover .post-title {
  background: var(--gradient);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.post-row:hover { padding-left: .35rem; padding-right: .35rem; }

@media (max-width: 640px) {
  .post-row { grid-template-columns: 1fr; gap: .25rem; padding: 1rem 0; }
  .post-row .post-cat { justify-self: start; margin-top: .25rem; }
}

/* ========================================================================= */
/* Post page                                                                 */
/* ========================================================================= */
.post-head {
  text-align: left;
  padding: 1rem 0 2rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}
.post-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  letter-spacing: -.02em;
  line-height: 1.15;
  margin: .75rem 0;
}
.post-meta {
  display: flex; align-items: center; gap: .6rem; flex-wrap: wrap;
  color: var(--text-mute); font-size: .9rem;
  margin-top: .85rem;
}
.post-meta .sep { opacity: .4; }
.chip {
  display: inline-block;
  font-family: var(--font-mono); font-size: .72rem;
  letter-spacing: .08em; text-transform: uppercase;
  padding: .25rem .65rem;
  border-radius: 999px;
  background: var(--gradient-soft);
  border: 1px solid var(--border-strong);
  color: var(--text);
}
.ghost-btn {
  background: none; border: 0; padding: 0;
  color: var(--text-mute); cursor: pointer; font-family: var(--font-mono); font-size: .85rem;
  transition: color var(--transition);
}
.ghost-btn:hover { color: var(--accent); }

/* ========================================================================= */
/* Prose                                                                     */
/* ========================================================================= */
.prose {
  max-width: var(--container-narrow);
}
.post .prose, .post .post-head { max-width: var(--container-narrow); margin-left: auto; margin-right: auto; }

/* Pages that need the full container width (home, /products, etc.) opt out
   of the narrow prose constraint via `is-home` or a `wide: true` frontmatter
   flag that resolves to `is-wide`. */
.is-home .prose,
.is-wide .prose { max-width: none; }

.prose p, .prose ul, .prose ol { font-size: 1.02rem; line-height: 1.8; color: var(--text-soft); }
.prose strong { color: var(--text); }
.prose h1, .prose h2, .prose h3, .prose h4 {
  font-family: var(--font-display);
  color: var(--text);
  letter-spacing: -.01em;
  margin: 2.25rem 0 .75rem;
  line-height: 1.25;
}
.prose h1 { font-size: 2rem; }
.prose h2 { font-size: 1.6rem; }
.prose h3 { font-size: 1.3rem; }
.prose h4 { font-size: 1.1rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-soft); }
.prose a {
  color: var(--link);
  border-bottom: 1px solid color-mix(in oklab, var(--link) 50%, transparent);
}
.prose a:hover { color: var(--accent); border-bottom-color: var(--accent); }
.prose ul, .prose ol { padding-left: 1.5rem; }
.prose li { margin: .35rem 0; }
.prose blockquote {
  margin: 1.75rem 0;
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--accent);
  background: var(--gradient-soft);
  color: var(--text);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.prose code, .prose .highlighter-rouge {
  font-family: var(--font-mono);
  font-size: .92em;
  padding: .15rem .4rem;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius-sm);
  color: var(--text);
}
.prose pre, .prose div.highlight {
  margin: 1.5rem 0;
  padding: 1.1rem 1.25rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow-x: auto;
  font-size: .9rem;
  box-shadow: var(--shadow);
}
.prose pre code,
.prose div.highlight code,
.prose div.highlight .highlighter-rouge { background: none; border: 0; padding: 0; font-size: 1em; }
.prose img { border-radius: var(--radius); border: 1px solid var(--border); }
.prose hr { margin: 2.5rem 0; }
.prose table {
  width: 100%; border-collapse: collapse; margin: 1.5rem 0;
  border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
}
.prose th, .prose td { padding: .6rem .8rem; border-bottom: 1px solid var(--border); text-align: left; }
.prose th { background: var(--surface); color: var(--text); font-weight: 600; }

/* ========================================================================= */
/* Signoff                                                                   */
/* ========================================================================= */
.signoff {
  margin: 3rem 0 2rem;
  padding: 1.5rem;
  border: 1px solid var(--border);
  background: var(--gradient-soft);
  border-radius: var(--radius);
  display: flex; align-items: center; gap: 1rem;
}
.signoff p { margin: 0; color: var(--text); font-family: var(--font-display); }
.signoff-mark { display: flex; gap: 4px; }
.signoff-mark span {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}
.signoff-mark span:nth-child(2) { animation-delay: .25s; background: var(--accent-2); box-shadow: 0 0 8px var(--accent-2); }
.signoff-mark span:nth-child(3) { animation-delay: .5s;  background: var(--accent-3); box-shadow: 0 0 8px var(--accent-3); }

/* ========================================================================= */
/* Pagination cards                                                          */
/* ========================================================================= */
.post-pager {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem;
  margin: 2rem 0 1rem;
}
.pager-card {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  gap: .15rem .65rem;
  align-items: center;
  padding: 1rem 1.15rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  transition: all var(--transition);
}
.pager-card:hover {
  border-color: var(--border-strong);
  background: var(--surface-hi);
  transform: translateY(-1px);
  color: var(--text);
}
.pager-card .icon { grid-row: 1 / span 2; color: var(--text-mute); }
.pager-meta { grid-column: 2; font-family: var(--font-mono); font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; color: var(--text-mute); }
.pager-title { grid-column: 2; font-weight: 600; line-height: 1.3; }
.pager-next { text-align: right; }
.pager-next .icon { grid-row: 1 / span 2; grid-column: 2; justify-self: end; }
.pager-next .pager-meta, .pager-next .pager-title { grid-column: 1; }

@media (max-width: 640px) {
  .post-pager { grid-template-columns: 1fr; }
}

/* ========================================================================= */
/* Footer                                                                    */
/* ========================================================================= */
.site-footer {
  margin-top: 4rem;
  border-top: 1px solid var(--border);
  background: color-mix(in oklab, var(--bg) 75%, transparent);
  padding: 3rem 0 2rem;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 2rem;
}
.footer-col h4 {
  font-family: var(--font-display);
  font-size: .92rem;
  margin: 0 0 .85rem;
  color: var(--text);
  text-transform: uppercase; letter-spacing: .12em;
}
.link-list { list-style: none; margin: 0; padding: 0; display: grid; gap: .35rem; }
.link-list.compact { gap: .25rem; }
.link-list a.link {
  display: inline-flex; align-items: center; gap: .5rem;
  color: var(--text-soft); font-size: .92rem;
}
.link-list a.link:hover { color: var(--accent); }
.footer-bottom {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

@media (max-width: 980px) {
  .footer-inner { grid-template-columns: 1fr 1fr 1fr; }
  .footer-col.footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 640px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-col.footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 420px) {
  .footer-inner { grid-template-columns: 1fr; }
}

/* Product cells — two-line layout: name + small descriptor */
.product-link {
  align-items: flex-start !important;
  gap: .55rem !important;
  padding: .15rem 0;
}
.product-text { display: flex; flex-direction: column; line-height: 1.25; }
.product-name { font-weight: 600; color: var(--text-soft); transition: color var(--transition); }
.product-link:hover .product-name { color: var(--accent); }
.product-desc { font-size: .72rem; margin-top: 2px; font-family: var(--font-mono); letter-spacing: .01em; }

/* Product card grid on /about */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: .75rem;
  margin: 1.25rem 0 1.75rem;
  padding: 0; list-style: none;
}
.product-grid li a {
  display: flex; align-items: flex-start; gap: .75rem;
  padding: .9rem 1.1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--gradient-soft);
  color: var(--text);
  transition: all var(--transition);
}
.product-grid li a:hover {
  border-color: var(--border-strong);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
  color: var(--text);
}
.product-grid .product-name { font-family: var(--font-display); font-size: 1rem; color: var(--text); }
.product-grid .icon { color: var(--accent); flex: none; margin-top: 2px; }

/* ========================================================================= */
/* About / community / links pages — light prose enhancements                */
/* ========================================================================= */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: .75rem;
  margin: 1.5rem 0;
  padding: 0; list-style: none;
}
.contact-grid li a {
  display: flex; align-items: center; gap: .65rem;
  padding: .8rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  transition: all var(--transition);
}
.contact-grid li a:hover {
  border-color: var(--border-strong);
  background: var(--surface-hi);
  color: var(--accent);
  transform: translateY(-1px);
}

/* Categories */
.cat-block {
  margin: 2rem 0;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
.cat-block h3 {
  font-family: var(--font-display);
  margin: 0 0 .75rem;
  letter-spacing: -.01em;
  display: inline-flex; align-items: center; gap: .5rem;
}
.cat-block h3::before {
  content: ""; width: 8px; height: 8px;
  border-radius: 2px;
  background: var(--gradient);
}
.cat-block ul { list-style: none; padding: 0; margin: 0; }
.cat-block li { padding: .35rem 0; }
.cat-block a { color: var(--text); border-bottom: 1px dashed transparent; }
.cat-block a:hover { color: var(--accent); border-bottom-color: var(--accent); }

/* 404 */
.notfound {
  text-align: center;
  padding: 6rem 1rem;
}
.notfound h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 5rem);
  background: var(--gradient);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 0 0 .5rem;
}
.notfound p { color: var(--text-soft); }
.notfound .btn { margin-top: 1.5rem; }
