/* ============================================================
   markd.cat — v2
   ============================================================ */

:root {
  --ink:         #24272d;
  --ink-hover:   #111318;
  --ink-subtle:  rgba(36, 39, 45, 0.10);
  --ink-on:      #ffffff;
  --anchor:      #0c9e6a;

  --bg:          #EDECEA;   /* warm page canvas — distinct from card */
  --bg-2:        #ffffff;   /* content card surface */
  --bg-3:        #f0eeeb;
  --text:        #1a1d23;
  --text-2:      #44505f;
  --text-3:      #7a8494;
  --border:      #dddbd6;
  --border-2:    #c8c5be;

  /* Code blocks — dynamic for light/dark mode */
  --code-bg:     #f4f3f0;
  --code-bg-2:   #e9e8e5;
  --code-text:   #4c4f69;
  --code-text-muted: #8c8fa1;
  --code-border: #e7e5e0;
  --code-border-hover: #bcc0cc;
  --code-inline-bg:   #eff1f5;
  --code-inline-text: #d20f39;
  --code-inline-border: #dde0e8;

  --font-sans:  Inter, system-ui, -apple-system, sans-serif;
  --font-mono:  "Geist Mono", "JetBrains Mono", ui-monospace, monospace;
  --font-head:  "Instrument Sans", Inter, system-ui, sans-serif;

  --r:    5px;
  --r-lg: 9px;
  --r-xl: 13px;

  --sh-sm: 0 1px 2px rgb(0 0 0 / .05), 0 0 0 1px rgb(0 0 0 / .04);
  --sh-md: 0 4px 12px rgb(0 0 0 / .08), 0 1px 3px rgb(0 0 0 / .05);
  --sh-lg: 0 12px 36px rgb(0 0 0 / .12), 0 4px 12px rgb(0 0 0 / .06);
}

.dark {
  --ink:         #1f232b;
  --ink-hover:   #2b3039;
  --ink-subtle:  rgba(148, 163, 184, 0.14);
  --ink-on:      #f8fafc;
  --anchor:      #2dd4a0;

  --bg:          #090c10;   /* deep canvas */
  --bg-2:        #0d1117;   /* content card — one clear step up */
  --bg-3:        #161b22;
  --text:        #f0f6fc;
  --text-2:      #adbac7;
  --text-3:      #636e7b;
  --border:      #21262d;
  --border-2:    #30363d;

  --code-bg:     #0d1117;
  --code-bg-2:   #090d12;
  --code-text:   #e6edf3;
  --code-text-muted: #7c85af;
  --code-border: #30363d;
  --code-border-hover: #6672a3;
  --code-inline-bg:   #1c2128;
  --code-inline-text: #ffa657;
  --code-inline-border: #30363d;

  --sh-sm: 0 0 0 1px var(--border);
  --sh-md: 0 0 0 1px var(--border), 0 8px 24px rgb(0 0 0 / .4);
  --sh-lg: 0 0 0 1px var(--border), 0 20px 48px rgb(0 0 0 / .6);
}

/* ============================================================
   Reset & base
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: none;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-2);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ============================================================
   Progress bar
   ============================================================ */

.progress-bar {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0%;
  background: var(--ink);
  z-index: 999;
  transition: width 80ms linear;
}

/* ============================================================
   Logo
   ============================================================ */

.logo {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}

.logo-mark {
  color: var(--ink);
  font-size: 24px;
  line-height: 1;
}

/* ============================================================
   Landing page
   ============================================================ */

.landing {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg);
  background-image: radial-gradient(circle, var(--text-3) 0.8px, transparent 0.8px);
  background-size: 24px 24px;
}

.dark .landing {
  background-image: radial-gradient(circle, color-mix(in srgb, var(--text-3) 35%, transparent) 0.8px, transparent 0.8px);
}

/* Also add grid to the published page for consistency */
.page-card {
  background-image: radial-gradient(circle, color-mix(in srgb, var(--text-3) 8%, transparent) 0.8px, transparent 0.8px);
  background-size: 24px 24px;
}

.landing .site-footer {
  margin-top: auto;
  padding: 12px 24px;
}

.landing-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 28px;
}

.workspace-page {
  min-height: 100vh;
}

.workspace-container {
  flex: 1;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 32px 36px 64px;
}

.workspace-shell {
  width: min(100%, calc(100vw - 72px));
  max-width: 1560px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  box-shadow: var(--sh-lg);
  overflow: hidden;
  animation: rise 380ms cubic-bezier(.16,1,.3,1) both;
}

.workspace-topbar {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 26px;
  background: var(--bg-3);
  border-bottom: 1px solid var(--border);
}

.workspace-label {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.workspace-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.workspace-primary {
  height: 42px;
  padding: 0 26px;
  font-size: 16px;
  border-radius: 9px;
}

.workspace-body {
  min-height: calc(100vh - 220px);
  padding: 48px 64px 64px;
  background: var(--bg-2);
}

.workspace-raw {
  display: block;
  width: 100%;
  min-height: calc(100vh - 360px);
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--text-2);
  background: transparent;
  border: none;
  outline: none;
  resize: none;
  caret-color: var(--ink);
  tab-size: 2;
}

.workspace-raw::placeholder {
  color: var(--text-3);
}

.workspace-raw.hidden,
.workspace-preview.hidden {
  display: none;
}

.workspace-preview {
  max-width: 880px;
  min-height: calc(100vh - 360px);
}

.landing-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 28px 28px 24px;
  max-width: 860px;
  margin: 0 auto;
  width: 100%;
  transition: max-width 460ms cubic-bezier(.16,1,.3,1);
}

.landing-main.split-active {
  max-width: none;
  align-items: stretch;
}

.landing-hero {
  text-align: center;
  margin-bottom: 24px;
  animation: rise 380ms cubic-bezier(.16,1,.3,1) both;
  max-height: 320px;
  overflow: hidden;
  transition: max-height 400ms cubic-bezier(.16,1,.3,1),
              opacity     280ms ease,
              margin      400ms cubic-bezier(.16,1,.3,1);
}

.landing-main.split-active .landing-hero {
  max-height: 0;
  opacity: 0;
  margin-bottom: 0;
  pointer-events: none;
}

.landing-headline {
  font-family: var(--font-head);
  font-size: 40px;
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 10px;
}

.landing-sub {
  font-size: 16px;
  color: var(--text-3);
  max-width: 400px;
  margin: 0 auto;
}

/* Split layout */

.landing-split {
  display: grid;
  grid-template-columns: 1fr 0fr;
  gap: 0;
  width: 100%;
  transition: grid-template-columns 460ms cubic-bezier(.16,1,.3,1),
              gap 460ms cubic-bezier(.16,1,.3,1);
}

.split-active .landing-split {
  grid-template-columns: 2fr 3fr;
  gap: 16px;
}

.split-editor {
  min-width: 0;
  animation: rise 380ms cubic-bezier(.16,1,.3,1) 60ms both;
}

.editor-form { width: 100%; }

.split-preview {
  min-width: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  opacity: 0;
  pointer-events: none;
  transition: opacity 340ms cubic-bezier(.16,1,.3,1) 80ms;
}

.split-active .split-preview {
  opacity: 1;
  pointer-events: auto;
  overflow: visible;
}

.preview-shell {
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
  box-shadow: var(--sh-md);
  display: flex;
  flex-direction: column;
  background: var(--bg-2);
}

.preview-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 14px;
  background: var(--bg-3);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.preview-topbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.preview-label {
  font-size: 11.5px;
  font-weight: 500;
  color: var(--text-3);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  user-select: none;
}

/* Segmented view toggle (MD / Preview) */
.segmented {
  display: inline-flex;
  padding: 2px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r);
}

.segmented-btn {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  font-family: var(--font-sans);
  font-size: 11.5px;
  font-weight: 500;
  line-height: 1;
  color: var(--text-3);
  background: transparent;
  border: none;
  border-radius: calc(var(--r) - 2px);
  cursor: pointer;
  transition: all 120ms ease;
}

a.segmented-btn {
  text-decoration: none;
}

.segmented-btn:hover { color: var(--text); }
.segmented-btn:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }

.segmented-btn.active {
  color: var(--text);
  background: var(--bg-3);
  box-shadow: var(--sh-sm);
}

.workspace-switch {
  position: relative;
  isolation: isolate;
  min-width: 154px;
  height: 36px;
  padding: 3px;
  overflow: hidden;
  background: color-mix(in srgb, var(--bg-2) 84%, var(--border));
  box-shadow: inset 0 1px 2px rgb(0 0 0 / .08), var(--sh-sm);
}

.workspace-switch::before {
  content: "";
  position: absolute;
  z-index: 0;
  top: 3px;
  left: 3px;
  width: calc(50% - 3px);
  height: calc(100% - 6px);
  border-radius: calc(var(--r) - 1px);
  background: linear-gradient(180deg, var(--bg-2), var(--bg-3));
  box-shadow: 0 1px 1px rgb(255 255 255 / .55) inset, 0 6px 16px rgb(2 6 23 / .14);
  transform: translateX(0);
  transition: transform 260ms cubic-bezier(.16,1,.3,1), box-shadow 180ms ease;
}

.dark .workspace-switch::before {
  box-shadow: 0 1px 0 rgb(255 255 255 / .06) inset, 0 10px 24px rgb(0 0 0 / .38);
}

.workspace-switch[data-active="preview"]::before {
  transform: translateX(100%);
}

.workspace-switch .segmented-btn {
  position: relative;
  z-index: 1;
  flex: 1;
  justify-content: center;
  height: 100%;
  min-width: 0;
  padding: 0 13px;
  color: var(--text-3);
  background: transparent;
  box-shadow: none;
  transition: color 180ms ease, transform 180ms cubic-bezier(.16,1,.3,1);
}

.workspace-switch .segmented-btn.active {
  color: var(--text);
  background: transparent;
  box-shadow: none;
  transform: translateY(-.5px);
}

.workspace-switch .segmented-btn:not(.active):hover {
  color: var(--text-2);
}

.preview-open-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  font-family: var(--font-sans);
  font-size: 11.5px;
  font-weight: 500;
  color: var(--text-2);
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  cursor: pointer;
  transition: all 130ms ease;
  box-shadow: var(--sh-sm);
  text-decoration: none;
}

.preview-open-btn:hover {
  color: var(--text);
  border-color: var(--border-2);
  box-shadow: var(--sh-md);
}

.preview-open-btn:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.preview-open-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.preview-body {
  padding: 32px 36px 48px;
  overflow-y: auto;
  height: calc(100vh - 160px);
}

.preview-body .content {
  margin: 0 auto;
}

.preview-body .content.hidden {
  display: none;
}

.preview-raw {
  display: none;
  margin: 0;
  font-family: "Geist Mono", "JetBrains Mono", ui-monospace, monospace;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-2);
  white-space: pre-wrap;
  word-break: break-word;
}

.preview-raw.show {
  display: block;
}

/* Editor */

.editor-form {
  width: 100%;
}

.editor-shell {
  border-radius: var(--r-xl);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--sh-md);
  transition: box-shadow 180ms ease, border-color 180ms ease;
}

.editor-shell:focus-within {
  border-color: var(--ink);
  box-shadow: var(--sh-lg), 0 0 0 3px var(--ink-subtle);
}

.editor-chrome {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--bg-3);
  border-bottom: 1px solid var(--border);
}

.chrome-dots {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.chrome-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.chrome-dot-r { background: #ff5f57; }
.chrome-dot-y { background: #febc2e; }
.chrome-dot-g { background: #28c840; }

.editor-filename {
  flex: 1;
  text-align: center;
  font-family: "Geist Mono", "JetBrains Mono", ui-monospace, monospace;
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--text-3);
  user-select: none;
}

.editor-textarea {
  display: block;
  width: 100%;
  height: 45vh;
  min-height: 220px;
  padding: 20px 24px;
  font-family: "Geist Mono", "JetBrains Mono", ui-monospace, monospace;
  font-size: 13px;
  font-weight: 400;
  line-height: 1.8;
  letter-spacing: 0.01em;
  font-feature-settings: "liga" 1, "calt" 1;
  color: var(--text);
  background: var(--bg-2);
  border: none;
  outline: none;
  resize: none;
  caret-color: var(--ink);
  tab-size: 2;
}

.dark .editor-textarea { background: var(--bg-2); }

.editor-textarea::placeholder { color: var(--text-3); }

.editor-statusbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 16px;
  background: var(--bg-3);
  border-top: 1px solid var(--border);
}

.editor-statusbar-left,
.editor-statusbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: "Geist Mono", "JetBrains Mono", ui-monospace, monospace;
  font-size: 11px;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.editor-statusbar-right { gap: 8px; }

.editor-kbd {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 2px 6px;
  background: var(--bg);
  border: 1px solid var(--border-2);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-3);
  box-shadow: 0 1px 0 var(--border-2);
}

/* ============================================================
   Buttons
   ============================================================ */

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0 16px;
  height: 32px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-on);
  background: var(--ink);
  border: 1px solid transparent;
  border-radius: var(--r);
  cursor: pointer;
  white-space: nowrap;
  transition: background 120ms, transform 80ms, box-shadow 120ms;
  box-shadow: 0 1px 3px rgb(0 0 0 / .2) inset 0 1px 0 rgb(255 255 255 / .08);
}

.btn-primary:hover  { background: var(--ink-hover); }
.btn-primary:active { transform: translateY(1px); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none !important; box-shadow: none !important; }

.btn-publish {
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 120ms ease;
}

.btn-publish:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px; height: 30px;
  background: transparent;
  border: none;
  border-radius: var(--r);
  color: var(--text-3);
  cursor: pointer;
  transition: color 120ms, background 120ms;
}

.btn-icon:hover { color: var(--text); background: var(--bg-3); }
.btn-icon:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }

/* ============================================================
   Published page header
   ============================================================ */

.page-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 50px;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom: 1px solid var(--border);
  transition: opacity 200ms ease;
}

.page-header.faded { opacity: 0.25; }
.page-header:hover  { opacity: 1; }

.page-header-end {
  display: flex;
  align-items: center;
  gap: 6px;
}

.reading-time {
  font-size: 12px;
  color: var(--text-3);
  padding: 0 8px;
  white-space: nowrap;
}

/* Theme toggle */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px; height: 30px;
  background: transparent;
  border: none;
  border-radius: var(--r);
  color: var(--text-3);
  cursor: pointer;
  transition: color 120ms, background 120ms;
}

.theme-toggle:hover { color: var(--text); background: var(--bg-3); }

.dark .theme-toggle .light-icon  { display: none; }
.dark .theme-toggle .dark-icon   { display: block; }
.theme-toggle .dark-icon          { display: none; }
:root:not(.dark) .theme-toggle .light-icon { display: block; }
:root:not(.dark) .theme-toggle .dark-icon  { display: none; }

/* Copy button */
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 0 12px;
  height: 28px;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-2);
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  cursor: pointer;
  transition: all 130ms ease;
  box-shadow: var(--sh-sm);
  white-space: nowrap;
  text-decoration: none;
}

.copy-btn:hover    { border-color: var(--border-2); color: var(--text); }
.copy-btn.copied   { color: var(--anchor); border-color: var(--anchor); }

/* ============================================================
   Document container
   ============================================================ */

.page-container {
  width: 90%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 24px 0 80px;
}

.page-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 5rem;
  box-shadow: var(--sh-md);
}

/* ============================================================
   Edit view — editor wears the page-card shell so switching
   between reading and editing never changes the layout box.
   ============================================================ */

.edit-card {
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.edit-card .editor-chrome { border-radius: 0; }

.edit-textarea {
  height: auto;
  min-height: 45vh;
  padding: 5rem;
  background: transparent !important;
}

.edit-card .editor-statusbar {
  border-bottom-left-radius: 12px;
  border-bottom-right-radius: 12px;
}

/* slide between view and edit */
.view-tray { will-change: transform, opacity; }

.view-tray.slide-out {
  opacity: 0;
  transform: translateX(-28px);
  transition: opacity 200ms ease, transform 400ms cubic-bezier(.16,1,.3,1);
}

.view-tray.slide-in {
  animation: traySlideIn 420ms cubic-bezier(.16,1,.3,1) both;
}

@keyframes traySlideIn {
  from { opacity: 0; transform: translateX(28px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ============================================================
   Content — the hero
   ============================================================ */

.content {
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--text-2);
  margin-left: auto;
  margin-right: auto;
}

.content > * + * { margin-top: 1.25em; }
.content > *:first-child { margin-top: 0; }

/* Headings */
.content h1,
.content h2,
.content h3,
.content h4 {
  font-family: var(--font-head);
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-top: 2em;
  margin-bottom: 0.5em;
}

.content h1 { font-size: 32px; letter-spacing: -0.03em; margin-top: 0; }
.content h2 {
  font-size: 22px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  margin-top: 2.5em;
}
.content h3 { font-size: 18px; }
.content h4 {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-3);
}

/* Paragraphs */
.content p { margin-bottom: 0; }

/* Emphasis */
.content strong { color: var(--text); font-weight: 600; }

/* Links */
.content a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  text-decoration-color: color-mix(in srgb, var(--ink) 30%, transparent);
  transition: text-decoration-color 140ms;
}
.content a:hover { text-decoration-color: var(--ink); }

/* Lists */
.content ul, .content ol {
  padding-left: 1.6em;
}
.content li + li  { margin-top: 0.3em; }
.content li > p   { margin: 0; }

/* Blockquote */
.content blockquote {
  margin: 1.6em 0;
  padding: 14px 20px 14px 24px;
  border-left: 3px solid var(--ink);
  background: var(--ink-subtle);
  border-radius: 0 var(--r) var(--r) 0;
  color: var(--text-2);
  font-style: italic;
}
.content blockquote strong { color: var(--text); }

/* HR */
.content hr {
  border: none;
  height: 1px;
  background: var(--border);
  margin: 2.5em 0;
}

/* Inline code — opinionated, pops against prose */
.content :not(pre) > code {
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--code-inline-bg);
  color: var(--code-inline-text);
  border: 1px solid var(--code-inline-border);
  white-space: nowrap;
}

/* ============================================================
   Code blocks — always dark, proper editor feel
   ============================================================ */

.code-wrapper {
  margin: 1.6em 0;
  border-radius: var(--r-lg);
  border: 1px solid var(--code-border);
  overflow: hidden;
  box-shadow: var(--sh-md);
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: var(--code-bg-2);
  border-bottom: 1px solid var(--code-border);
}

.code-lang {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--code-text-muted);
  text-transform: lowercase;
  letter-spacing: 0.04em;
  user-select: none;
}

.code-copy-btn {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  color: var(--code-text-muted);
  background: transparent;
  border: 1px solid var(--code-border);
  border-radius: 4px;
  padding: 2px 9px;
  cursor: pointer;
  transition: all 120ms ease;
}

.code-copy-btn:hover  { color: var(--code-text); border-color: var(--code-border-hover); }
.code-copy-btn.copied { color: var(--anchor); border-color: var(--anchor); }

.content pre {
  margin: 0;
  background: var(--code-bg) !important;
  border: none !important;
  border-radius: 0 !important;
  box-shadow: none !important;
  overflow: hidden;
}

.content pre code {
  display: block;
  padding: 18px 20px;
  overflow-x: auto;
  background: transparent !important;
  border: none !important;
  border-radius: 0 !important;
  color: var(--code-text);
  font-size: 13.5px;
  line-height: 1.65;
  white-space: pre;
  -webkit-overflow-scrolling: touch;
}

/* scrollbar inside code */
.content pre code::-webkit-scrollbar { height: 6px; }
.content pre code::-webkit-scrollbar-track { background: var(--code-bg-2); }
.content pre code::-webkit-scrollbar-thumb { background: var(--code-border-hover); border-radius: 3px; }

/* ============================================================
   Mermaid diagrams
   ============================================================ */

.mermaid-wrapper {
  margin: 1.8em 0;
  padding: 24px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-sm);
  overflow-x: auto;
}

.mermaid-wrapper pre.mermaid {
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text-3);
  background: transparent !important;
  border: none !important;
  border-radius: 0 !important;
  box-shadow: none !important;
}

.mermaid-wrapper svg {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}

.mermaid-loader {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 56px;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
  user-select: none;
}

.mermaid-loader-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-3);
  animation: mermaidPulse 1.2s ease-in-out infinite;
}

.mermaid-error {
  color: var(--text-3);
}

.mermaid-error::before {
  content: "— ";
}

@keyframes mermaidPulse {
  0%, 100% { opacity: .35; transform: scale(.8); }
  50%      { opacity: 1;   transform: scale(1); }
}

/* ============================================================
   Tables
   ============================================================ */

/* Table scroll wrapper — injected by JS */
.content .table-wrapper {
  margin: 1.6em 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-sm);
}

.content table {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  font-size: 14px;
  margin: 0;
  border: none;
  border-radius: 0;
  box-shadow: none;
}

.content thead { background: var(--bg-2); }

.content th {
  padding: 10px 14px;
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-3);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.content td {
  padding: 10px 14px;
  color: var(--text-2);
  border-bottom: 1px solid var(--border);
  vertical-align: top;
  word-break: break-word;
  overflow-wrap: anywhere;
  max-width: 320px;
}

.content td a {
  word-break: break-all;
}

.content tr:last-child td   { border-bottom: none; }
.content tbody tr:hover      { background: var(--bg-2); }

/* ============================================================
   Images
   ============================================================ */

.content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  box-shadow: var(--sh-md);
  margin: 0.5em 0;
}

/* ============================================================
   Task list
   ============================================================ */

.content input[type="checkbox"] {
  accent-color: var(--ink);
  margin-right: 6px;
  transform: translateY(1px);
}

/* ============================================================
   Heading anchors
   ============================================================ */

.content :is(h1,h2,h3,h4):hover .anchor { opacity: 1; }

.content .anchor {
  display: inline-block;
  margin-left: 6px;
  color: var(--text-3);
  opacity: 0;
  text-decoration: none;
  font-family: var(--font-sans);
  font-weight: 400;
  transition: opacity 120ms, color 120ms;
}

.content .anchor:hover { color: var(--ink); }

/* ============================================================
   Toast
   ============================================================ */

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  padding: 9px 18px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-lg);
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  opacity: 0;
  pointer-events: none;
  z-index: 200;
  white-space: nowrap;
  transition: opacity 200ms, transform 240ms cubic-bezier(.16,1,.3,1);
}

.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.toast.success {
  font-weight: 700;
  font-size: 14px;
  color: var(--anchor);
  border-color: color-mix(in srgb, var(--anchor) 45%, var(--border));
  background: color-mix(in srgb, var(--anchor) 8%, var(--bg-2));
}

/* ============================================================
   Publish notice — top-center success alert
   ============================================================ */

.publish-notice {
  position: fixed;
  top: 0;
  left: 50%;
  width: 360px;
  z-index: 300;
  padding: 18px 48px 18px 20px;
  background: var(--bg-2);
  border: 1px solid color-mix(in srgb, var(--anchor) 40%, var(--border));
  border-bottom-left-radius: var(--r-xl);
  border-bottom-right-radius: var(--r-xl);
  border-top-left-radius: 0;
  border-top-right-radius: 0;
  box-shadow: var(--sh-lg);
  opacity: 0;
  transform: translateX(-50%) translateY(-100%);
  pointer-events: none;
  transition: opacity 300ms cubic-bezier(.16,1,.3,1),
              transform 400ms cubic-bezier(.16,1,.3,1);
}

.publish-notice.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.publish-notice-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--r);
  color: var(--text-3);
  cursor: pointer;
  transition: color 120ms, background 120ms;
}

.publish-notice-close:hover {
  color: var(--text);
  background: var(--bg-3);
}

.publish-notice-head {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--anchor);
  margin-bottom: 6px;
}

.publish-notice-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.publish-notice-text {
  font-size: 13px;
  color: var(--text-3);
  margin-bottom: 14px;
}

.publish-notice-open {
  width: 100%;
  height: 36px;
  font-size: 13.5px;
  justify-content: center;
}

/* ============================================================
   Footer
   ============================================================ */

.site-footer {
  padding: 24px 32px;
  text-align: center;
  font-size: 13px;
  color: var(--text-3);
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.site-footer a {
  color: var(--text-2);
  text-decoration: none;
  font-weight: 500;
  transition: color 120ms;
}

.site-footer a:hover { color: var(--text); }

/* ============================================================
   404
   ============================================================ */

.error-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 32px;
}

.error-glyph { font-size: 88px; color: var(--border); margin-bottom: 16px; user-select: none; line-height: 1; }
.error-heading { font-size: 18px; font-weight: 600; color: var(--text); margin-bottom: 8px; }
.error-text { font-size: 15px; color: var(--text-3); margin-bottom: 28px; max-width: 360px; }

/* ============================================================
   Animations
   ============================================================ */

@keyframes rise {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition-duration: 1ms !important; }
}

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 640px) {
  .landing-headline  { font-size: 34px; }
  .landing-sub       { font-size: 15px; }
  .landing-main      { padding: 28px 16px 60px; }
  .editor-textarea   { padding: 18px 20px; min-height: 280px; }
  .landing-header    { padding: 14px 18px; }

  .workspace-container { padding: 18px 12px 48px; }
  .workspace-shell     { width: 100%; border-radius: 12px; }
  .workspace-topbar    { min-height: 56px; padding: 10px 12px; gap: 10px; }
  .workspace-label     { font-size: 12px; }
  .workspace-actions   { gap: 8px; }
  .workspace-actions .preview-open-btn { display: none; }
  .workspace-primary   { height: 34px; padding: 0 14px; font-size: 13px; }
  .workspace-body      { min-height: calc(100vh - 190px); padding: 32px 22px 44px; }
  .workspace-raw       { min-height: calc(100vh - 290px); font-size: 15.5px; line-height: 1.75; }
  .workspace-preview   { min-height: calc(100vh - 290px); }

  .page-header       { padding: 0 16px; }
  .page-container    { padding: 12px; }
  .page-card         { padding: 28px 20px 48px; border-radius: 8px; }
  .reading-time      { display: none; }

  .content           { font-size: 15.5px; }
  .content h1        { font-size: 26px; }
  .content h2        { font-size: 20px; }

  .edit-textarea     { padding: 2rem 1.25rem; }
}