/* ------------------------------------------------------------------
   Personal blog: the same design system as the phone app
   (packages/phone-app/index.html in browser-controller): neutral greys,
   one indigo-violet accent, hairline borders, soft shadows, rounded
   surfaces, the system font, light and dark by the device's setting.
   Plain CSS, no web fonts, no requests: this file is linked by the posts
   and inlined into the index page.
   ------------------------------------------------------------------ */

:root {
  color-scheme: light dark;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-round: ui-rounded, "SF Pro Rounded", "Arial Rounded MT Bold", "Varela Round", "Nunito", var(--font);
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --bg: #f6f6f8;
  --surface: #ffffff;
  --surface-2: #f0f0f3;
  --surface-3: #e6e6eb;
  --fg: #17171c;
  --fg-2: #3c3c44;
  --muted: #6b6b76;
  --line: rgba(23, 23, 28, 0.09);
  --line-strong: rgba(23, 23, 28, 0.16);
  --accent: #5b5bf0;
  --accent-fg: #ffffff;
  --accent-soft: rgba(91, 91, 240, 0.11);
  --accent-text: #4545d4;
  --warning-soft: #fff3dc;
  --warning-text: #8a4b00;
  --gradient: linear-gradient(135deg, #5b5bf0 0%, #7c3aed 100%);
  --mark-a: #5b5bf0;
  --mark-b: #9333ea;
  --mark-c: #d946ef;
  --shadow-xs: 0 1px 2px rgba(16, 16, 28, 0.05);
  --shadow-sm: 0 1px 2px rgba(16, 16, 28, 0.05), 0 2px 8px rgba(16, 16, 28, 0.05);
  --shadow-md: 0 1px 3px rgba(16, 16, 28, 0.06), 0 6px 18px rgba(16, 16, 28, 0.08);
  --shadow-accent: 0 4px 14px rgba(91, 91, 240, 0.32);
  --ring: 0 0 0 3px rgba(91, 91, 240, 0.28);
  --r-xs: 6px;
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-full: 999px;
  --ease-out: cubic-bezier(0.22, 0.8, 0.24, 1);
  --dur-1: 120ms;
  --dur-2: 200ms;
  --dur-3: 320ms;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c0c10;
    --surface: #17171d;
    --surface-2: #1f1f26;
    --surface-3: #2a2a33;
    --fg: #ececf1;
    --fg-2: #c8c8d0;
    --muted: #9a9aa6;
    --line: rgba(255, 255, 255, 0.075);
    --line-strong: rgba(255, 255, 255, 0.14);
    --accent-soft: rgba(124, 124, 255, 0.16);
    --accent-text: #a9aaff;
    --warning-soft: rgba(245, 165, 36, 0.13);
    --warning-text: #f7bd5b;
    --gradient: linear-gradient(135deg, #5050e6 0%, #6d32d8 100%);
    --mark-a: #8f8fff;
    --mark-b: #b98cff;
    --mark-c: #f08cf5;
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3), 0 2px 8px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 1px 3px rgba(0, 0, 0, 0.35), 0 6px 18px rgba(0, 0, 0, 0.35);
    --shadow-accent: 0 4px 16px rgba(80, 80, 230, 0.35);
    --ring: 0 0 0 3px rgba(124, 124, 255, 0.35);
  }
}

/* ---- Base ---- */
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-tap-highlight-color: transparent; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.45 var(--font);
  -webkit-font-smoothing: antialiased;
}
::selection { background: rgba(91, 91, 240, 0.25); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button { font: inherit; color: inherit; touch-action: manipulation; }
img { max-width: 100%; height: auto; }

/* ---- The top bar: the orb, the name as a wordmark, one line under it ---- */
.top { position: sticky; top: 0; z-index: 20; background: var(--bg); border-bottom: 1px solid var(--line); }
.top-in {
  display: flex;
  align-items: center;
  max-width: 1040px;
  height: calc(60px + env(safe-area-inset-top));
  margin: 0 auto;
  padding: env(safe-area-inset-top) 16px 0;
}
.brand { display: flex; align-items: center; gap: 10px; min-width: 0; color: inherit; text-decoration: none; }
.brand:hover { text-decoration: none; }
.orb { position: relative; flex: none; width: 34px; height: 34px; border-radius: 50%; }
.orb-core {
  position: absolute;
  inset: 0;
  overflow: hidden;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18), 0 2px 8px rgba(91, 91, 240, 0.28);
}
.orb-core::before {
  content: "";
  position: absolute;
  inset: -30%;
  background: conic-gradient(from 200deg, #5b5bf0, #8b5cf6, #d946ef, #f59e0b, #22d3ee, #5b5bf0);
}
.orb-core::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 26%, rgba(255, 255, 255, 0.75), rgba(255, 255, 255, 0) 46%),
    radial-gradient(circle at 70% 85%, rgba(20, 10, 60, 0.35), rgba(20, 10, 60, 0) 55%);
}
.who { display: flex; flex-direction: column; min-width: 0; line-height: 1.3; }
.wordmark { padding-bottom: 3px; font: 800 19px/1.15 var(--font-round); letter-spacing: -0.04em; white-space: nowrap; color: var(--fg); }
.wordmark .only {
  position: relative;
  padding: 0 0.06em;
  background: linear-gradient(100deg, var(--mark-a), var(--mark-b) 55%, var(--mark-c));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.wordmark .only::after {
  content: "";
  position: absolute;
  left: 0.04em;
  right: 0.02em;
  bottom: -2px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--mark-a), var(--mark-c));
  transform: rotate(-1.6deg);
  transform-origin: left center;
}
.wordmark::after {
  content: "";
  display: inline-block;
  width: 0.26em;
  height: 0.26em;
  margin-left: 0.06em;
  border-radius: 50%;
  background: var(--mark-c);
  animation: wink 700ms var(--ease-out) 0.6s 1 both;
}
.tagline { font-size: 13px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
@keyframes wink { 0% { transform: scale(0); } 60% { transform: scale(1.5); } 100% { transform: scale(1); } }

/* ---- The index: tag browser and list ---- */
.wrap { max-width: 1040px; margin: 0 auto; padding: 14px 16px calc(56px + env(safe-area-inset-bottom)); }
.layout { display: block; }

.tags {
  padding: 12px;
  border-radius: var(--r-lg);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.tags-label { margin: 0 2px 8px; font-size: 12px; font-weight: 650; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }

.chip {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  margin: 0;
  padding: 6px 12px;
  border-radius: var(--r-full);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-xs);
  color: var(--fg);
  font-size: 14px;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  transition: transform var(--dur-1) var(--ease-out), background-color var(--dur-2), color var(--dur-2), border-color var(--dur-2), box-shadow var(--dur-2);
}
.chip:active { transform: scale(0.97); }
.chip .n { font-size: 12.5px; font-variant-numeric: tabular-nums; color: var(--muted); transition: color var(--dur-2); }
/* On the way to the selected tag (a top level whose sub-level is picked). */
.chip.anc { background: var(--accent-soft); color: var(--accent-text); border-color: transparent; box-shadow: none; }
.chip.anc .n { color: inherit; opacity: 0.8; }
/* The tag the list shows. */
.chip.sel { background: var(--gradient); color: var(--accent-fg); border-color: transparent; box-shadow: var(--shadow-accent); font-weight: 600; }
.chip.sel .n { color: rgba(255, 255, 255, 0.82); }
/* Drafts: not finished, so a dashed outline. */
.chip[data-key="draft"]:not(.sel) { border-style: dashed; border-color: var(--line-strong); background: none; box-shadow: none; color: var(--muted); }
@media (hover: hover) and (pointer: fine) {
  .chip:not(.sel):hover { border-color: var(--line-strong); background: var(--surface-2); }
}

/* The level under the picked tag: a tray of smaller chips, one tap away. */
.tag-sub { display: grid; gap: 8px; }
.tray {
  margin: 10px 0 0;
  padding: 8px;
  border-radius: var(--r-md);
  background: var(--surface-2);
  animation: drop-in var(--dur-3) var(--ease-out);
}
.tray .chip { min-height: 32px; padding: 5px 11px; font-size: 13.5px; background: var(--surface); }
.tray .chip.sel { background: var(--accent-soft); color: var(--accent-text); box-shadow: none; font-weight: 650; }
.tray .chip.sel .n { color: inherit; opacity: 0.8; }
.tray .chip.anc { background: var(--accent-soft); }
@keyframes drop-in { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }

.posts { margin-top: 18px; min-width: 0; }
.list-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin: 0 2px 10px; }
.list-head h2 { margin: 0; min-width: 0; font-size: 15px; font-weight: 650; line-height: 1.3; letter-spacing: 0; overflow-wrap: anywhere; }
.list-head span { flex: none; font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }
#page-list { display: grid; gap: 8px; }
.page-link {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 52px;
  padding: 11px 16px 11px 16px;
  border-radius: var(--r-md);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-xs);
  color: var(--fg);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.35;
  text-decoration: none;
  overflow-wrap: anywhere;
  transition: transform var(--dur-1) var(--ease-out), border-color var(--dur-2), box-shadow var(--dur-2), background-color var(--dur-2);
}
.page-link::after {
  content: "";
  flex: none;
  width: 7px;
  height: 7px;
  border: solid var(--muted);
  border-width: 1.5px 1.5px 0 0;
  transform: rotate(45deg);
  opacity: 0.7;
}
.page-link:active { transform: scale(0.985); }
.page-link:hover { text-decoration: none; color: var(--fg); }
@media (hover: hover) and (pointer: fine) {
  .page-link:hover { border-color: var(--accent); box-shadow: var(--shadow-md); }
}
.empty { padding: 20px 4px; color: var(--muted); }

/* Desktop: the tag browser stays at the left while the list scrolls. */
@media (min-width: 860px) {
  .wrap { padding-top: 24px; }
  .layout { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: 28px; align-items: start; }
  .tags { position: sticky; top: 84px; }
  .posts { margin-top: 0; }
  .list-head h2 { font-size: 17px; }
}

/* ---- A post ---- */
.post { max-width: 720px; margin: 0 auto; padding: 22px 18px calc(64px + env(safe-area-inset-bottom)); }
.post-head { margin-bottom: 22px; }
.post-head h1 { margin: 0 0 8px; font-size: 28px; font-weight: 750; line-height: 1.18; letter-spacing: -0.02em; text-wrap: balance; overflow-wrap: anywhere; }
.post-head .sub { margin: 0; font-size: 17px; line-height: 1.4; color: var(--muted); text-wrap: balance; }

.prose { font-size: 16px; line-height: 1.7; overflow-wrap: break-word; }
.prose > :first-child { margin-top: 0; }
.prose p, .prose ul, .prose ol, .prose pre, .prose table, .prose blockquote, .prose figure { margin: 0 0 1.1em; }
.prose h1, .prose h2, .prose h3, .prose h4, .prose h5, .prose h6 { margin: 1.9em 0 0.55em; font-weight: 700; line-height: 1.25; letter-spacing: -0.01em; color: var(--fg); text-wrap: balance; }
.prose h1 { font-size: 26px; }
.prose h2 { font-size: 22px; }
.prose h3 { font-size: 18px; font-weight: 650; }
.prose h4 { font-size: 16px; font-weight: 650; }
.prose h5, .prose h6 { font-size: 13px; font-weight: 650; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.prose a { color: var(--accent-text); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; text-decoration-color: var(--line-strong); }
.prose a:hover { text-decoration-color: currentColor; }
.prose strong { font-weight: 650; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin: 0.3em 0; padding-left: 0.2em; }
.prose li::marker { color: var(--muted); }
.prose li > p { margin: 0.4em 0; }
.prose li > ul, .prose li > ol { margin: 0.3em 0 0.4em; }
.prose hr { margin: 2em 0; border: 0; border-top: 1px solid var(--line); }
.prose img { display: block; margin: 1.2em auto; border-radius: var(--r-md); border: 1px solid var(--line); }
.prose blockquote {
  padding: 12px 16px;
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: var(--accent-soft);
  color: var(--fg-2);
}
.prose blockquote > :last-child { margin-bottom: 0; }
.prose code {
  padding: 0.12em 0.4em;
  border-radius: var(--r-xs);
  background: var(--surface-2);
  color: var(--fg);
  font: 0.88em/1.4 var(--font-mono);
}
.prose pre {
  padding: 14px 16px;
  border-radius: var(--r-md);
  background: var(--surface-2);
  border: 1px solid var(--line);
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.55;
  -webkit-overflow-scrolling: touch;
}
.prose pre code { padding: 0; border-radius: 0; background: none; font-size: inherit; }
/* A wide table scrolls sideways inside itself instead of widening the page. */
.prose table {
  display: block;
  width: max-content;
  max-width: 100%;
  overflow-x: auto;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  font-size: 15px;
  line-height: 1.45;
}
.prose th, .prose td { padding: 8px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.prose tr:last-child td { border-bottom: 0; }
.prose th { background: var(--surface-2); font-weight: 650; white-space: nowrap; }

.back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  margin-top: 28px;
  padding: 0 22px;
  border-radius: var(--r-full);
  background: var(--gradient);
  color: var(--accent-fg);
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--shadow-accent);
  transition: transform var(--dur-1) var(--ease-out);
}
.back:hover { color: var(--accent-fg); text-decoration: none; }
.back:active { transform: scale(0.97); }
.back::before {
  content: "";
  width: 7px;
  height: 7px;
  border: solid currentColor;
  border-width: 0 0 2px 2px;
  transform: rotate(45deg);
  margin-right: -2px;
}

@media (min-width: 720px) {
  .post { padding-top: 40px; }
  .post-head h1 { font-size: 34px; }
  .prose { font-size: 17px; }
  .prose h1 { font-size: 30px; }
  .prose h2 { font-size: 24px; }
  .prose h3 { font-size: 19px; }
  .prose pre { font-size: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}