:root {
  /* Light Theme (Default) */
  --bg-color: #f7f7f7;
  --text-primary: #111;
  --text-secondary: #5f5f5f;
  --text-tertiary: #7a7a7a;
  --accent: #111;

  --card-bg: transparent;
  --card-bg-hover: #fff;
  --card-border: rgba(0, 0, 0, 0.08);
  --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
  --card-shadow-hover: 0 8px 20px rgba(0, 0, 0, 0.04);

  --nav-divider: rgba(0, 0, 0, 0.12);
  --pill-bg: transparent;
  --pill-text: #7a7a7a;
  --pill-hover-text: #111;
  --pill-active-bg: #e5e5e5;
  --pill-active-text: #111;

  --view-bg: #fff;
  --callout-bg: #f1f1f1;
  --callout-border: rgba(0, 0, 0, 0.08);
  --code-bg: #f1f1f1;
  --code-border: rgba(0, 0, 0, 0.08);
  --code-text: #1c1c1c;
  --code-keyword: #9a3e00;
  --code-string: #0b6b4f;
  --code-comment: #6a6a6a;
  --code-number: #1b6ca8;
  --code-title: #2a5d9f;
  --code-built-in: #8a5b00;
  --code-symbol: #a23d3d;
  --code-attr: #0b5f72;
  --table-border: rgba(0, 0, 0, 0.12);
  --table-header-bg: rgba(0, 0, 0, 0.03);
  --focus-ring: rgba(0, 0, 0, 0.1);

  --cat-0: hsl(210, 35%, 45%);
  --cat-1: hsl(25, 35%, 45%);
  --cat-2: hsl(150, 30%, 40%);
  --cat-3: hsl(280, 30%, 45%);
  --cat-4: hsl(350, 30%, 45%);

  --font-ui: system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-body: 'Iowan Old Style', 'Times New Roman', serif;
  --nav-height: 6.5rem;
  --content-max-width: 860px;
  --layout-gap: 1.5rem;
  --layout-inline-padding: 4%;
  --layout-desktop-inline-padding: 2.5rem;
  --sidebar-width: 200px;
  --sidebar-sticky-top: calc(var(--nav-height) + var(--layout-gap));
  --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  color-scheme: light;
}

[data-theme='auto'] {
  color-scheme: light;
}

[data-theme='dark'] {
  --bg-color: #090909;
  --text-primary: #f2f2f2;
  --text-secondary: #b4b4b4;
  --text-tertiary: #7a7a7a;
  --accent: #f2f2f2;

  --card-bg: transparent;
  --card-bg-hover: #1c1c1c;
  --card-border: rgba(255, 255, 255, 0.12);
  --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
  --card-shadow-hover: 0 8px 20px rgba(0, 0, 0, 0.2);

  --nav-divider: rgba(255, 255, 255, 0.12);
  --pill-bg: transparent;
  --pill-text: #8a8a8a;
  --pill-hover-text: #f2f2f2;
  --pill-active-bg: #2a2a2a;
  --pill-active-text: #f2f2f2;

  --cat-0: hsl(210, 40%, 65%);
  --cat-1: hsl(25, 40%, 65%);
  --cat-2: hsl(150, 35%, 60%);
  --cat-3: hsl(280, 35%, 60%);
  --cat-4: hsl(350, 35%, 60%);

  --view-bg: #111;
  --callout-bg: rgba(255, 255, 255, 0.06);
  --callout-border: rgba(255, 255, 255, 0.12);
  --code-bg: #1c1c1c;
  --code-border: rgba(255, 255, 255, 0.12);
  --code-text: #e6e6e6;
  --code-keyword: #ffb454;
  --code-string: #9be6b2;
  --code-comment: #7a7a7a;
  --code-number: #8ad3ff;
  --code-title: #8ab4ff;
  --code-built-in: #ffd27d;
  --code-symbol: #ff9aa2;
  --code-attr: #7bdff2;
  --table-border: rgba(255, 255, 255, 0.16);
  --table-header-bg: rgba(255, 255, 255, 0.05);
  --focus-ring: rgba(255, 255, 255, 0.12);
  color-scheme: dark;
}

[data-theme='dark'] .ask-ai-pill-icon-wrap[data-brand='chatgpt'] {
  background: rgba(255, 255, 255, 0.12);
  color: #f2f2f2;
  box-shadow: none;
}

[data-theme='dark'] .ask-ai-pill-icon-wrap[data-brand='grok'] {
  background: rgba(255, 255, 255, 0.12);
}

@media (prefers-color-scheme: dark) {
  [data-theme='auto'] {
    --bg-color: #090909;
    --text-primary: #f2f2f2;
    --text-secondary: #b4b4b4;
    --text-tertiary: #7a7a7a;
    --accent: #f2f2f2;

    --card-bg: transparent;
    --card-bg-hover: #1c1c1c;
    --card-border: rgba(255, 255, 255, 0.12);
    --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
    --card-shadow-hover: 0 8px 20px rgba(0, 0, 0, 0.2);

    --nav-divider: rgba(255, 255, 255, 0.12);
    --pill-bg: transparent;
    --pill-text: #8a8a8a;
    --pill-hover-text: #f2f2f2;
    --pill-active-bg: #2a2a2a;
    --pill-active-text: #f2f2f2;

    --cat-0: hsl(210, 40%, 65%);
    --cat-1: hsl(25, 40%, 65%);
    --cat-2: hsl(150, 35%, 60%);
    --cat-3: hsl(280, 35%, 60%);
    --cat-4: hsl(350, 35%, 60%);

    --view-bg: #111;
    --callout-bg: rgba(255, 255, 255, 0.06);
    --callout-border: rgba(255, 255, 255, 0.12);
    --code-bg: #1c1c1c;
    --code-border: rgba(255, 255, 255, 0.12);
    --code-text: #e6e6e6;
    --code-keyword: #ffb454;
    --code-string: #9be6b2;
    --code-comment: #7a7a7a;
    --code-number: #8ad3ff;
    --code-title: #8ab4ff;
    --code-built-in: #ffd27d;
    --code-symbol: #ff9aa2;
    --code-attr: #7bdff2;
    --focus-ring: rgba(255, 255, 255, 0.12);
    color-scheme: dark;
  }

  [data-theme='auto'] .ask-ai-pill-icon-wrap[data-brand='chatgpt'] {
    background: rgba(255, 255, 255, 0.12);
    color: #f2f2f2;
    box-shadow: none;
  }

  [data-theme='auto'] .ask-ai-pill-icon-wrap[data-brand='grok'] {
    background: rgba(255, 255, 255, 0.12);
  }
}

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

body {
  font-family: var(--font-ui);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

#root {
  padding-top: var(--nav-height);
}

.page-shell {
  position: relative;
}

.page-shell-content {
  width: min(var(--content-max-width), 100%);
  margin: 0 auto;
}

body[data-page='list'] #root {
  position: relative;
}

body[data-page='list'] #root::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: var(--nav-height);
  bottom: 0;
  width: min(var(--content-max-width), 100%);
  background: var(--view-bg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  pointer-events: none;
  z-index: 0;
}

body[data-page='list'] .filter-bar,
body[data-page='list'] .grid-container {
  position: relative;
  z-index: 1;
}

body[data-page='post'] .article-page {
  opacity: 1;
  transform: none;
}

body[data-page='ask-ai'] #root {
  position: relative;
}

body[data-page='ask-ai'] .ask-ai-page {
  --ask-ai-card-radius: 16px;
  --ask-ai-pill-radius: 999px;
  --ask-ai-title-base: #343434;
  --ask-ai-border: rgba(0, 0, 0, 0.07);
  --ask-ai-card-border: rgba(0, 0, 0, 0.055);
  --ask-ai-shadow: 0 10px 26px rgba(0, 0, 0, 0.045);
  --ask-ai-card-shadow: 0 8px 22px rgba(0, 0, 0, 0.03);
  --ask-ai-shadow-soft: 0 4px 14px rgba(0, 0, 0, 0.028);
  padding: 2.45rem 0 4.5rem;
}

[data-theme='dark'] body[data-page='ask-ai'] .ask-ai-page {
  --ask-ai-title-base: #d0d0d0;
  --ask-ai-border: rgba(255, 255, 255, 0.17);
  --ask-ai-card-border: rgba(255, 255, 255, 0.12);
  --ask-ai-shadow: 0 12px 28px rgba(0, 0, 0, 0.34);
  --ask-ai-card-shadow: 0 10px 24px rgba(0, 0, 0, 0.28);
  --ask-ai-shadow-soft: 0 4px 14px rgba(0, 0, 0, 0.25);
}

@media (prefers-color-scheme: dark) {
  [data-theme='auto'] body[data-page='ask-ai'] .ask-ai-page {
    --ask-ai-title-base: #d0d0d0;
    --ask-ai-border: rgba(255, 255, 255, 0.17);
    --ask-ai-card-border: rgba(255, 255, 255, 0.12);
    --ask-ai-shadow: 0 12px 28px rgba(0, 0, 0, 0.34);
    --ask-ai-card-shadow: 0 10px 24px rgba(0, 0, 0, 0.28);
    --ask-ai-shadow-soft: 0 4px 14px rgba(0, 0, 0, 0.25);
  }
}

.ask-ai-shell {
  width: min(840px, 92%);
  display: grid;
  gap: 1.55rem;
}

/* Hero */
.ask-ai-hero {
  text-align: center;
  position: relative;
  padding: 0.65rem 0 0;
  max-width: 740px;
  margin: 0 auto;
  display: grid;
  gap: 0.75rem;
}

.ask-ai-hero::before {
  content: '';
  position: absolute;
  top: -32%;
  left: 50%;
  transform: translateX(-50%);
  width: 440px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(100, 180, 190, 0.06), transparent 72%);
  pointer-events: none;
  z-index: -1;
}

.ask-ai-kicker {
  font-size: 0.66rem;
  font-weight: 620;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin: 0;
  min-height: 0.8rem;
  opacity: 0;
  animation: askAiFadeInMuted 0.4s ease forwards;
}

.ask-ai-kicker:empty {
  min-height: 0;
  margin: 0;
  opacity: 0;
  animation: none;
}

.ask-ai-title {
  font-size: clamp(1.8rem, 2.5vw + 1.2rem, 2.8rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0;
  background: linear-gradient(
    118deg,
    hsl(195, 45%, 47%) 0%,
    hsl(31, 35%, 47%) 32%,
    var(--ask-ai-title-base) 54%,
    var(--ask-ai-title-base) 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  opacity: 0;
  animation: askAiFadeIn 0.4s ease 0.05s forwards;
}

.ask-ai-subtitle {
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--text-secondary);
  max-width: 48ch;
  margin: 0 auto;
  opacity: 0;
  animation: askAiFadeIn 0.4s ease 0.1s forwards;
}

.ask-ai-trust {
  display: inline-flex;
  align-items: center;
  gap: 0.34rem;
  font-size: 0.72rem;
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--text-tertiary);
  margin: 0.22rem auto 0;
  padding: 0.3rem 0.62rem;
  border: 1px solid var(--ask-ai-border);
  border-radius: var(--ask-ai-pill-radius);
  background: var(--view-bg);
  box-shadow: var(--ask-ai-shadow-soft);
  opacity: 0;
  animation: askAiFadeIn 0.35s ease 0.13s forwards;
}

.ask-ai-trust::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: hsl(195, 50%, 55%);
  flex-shrink: 0;
}

.ask-ai-query {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  display: grid;
  gap: 0.8rem;
  opacity: 0;
  animation: askAiFadeUp 0.35s ease 0.14s forwards;
}

.ask-ai-query-form {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--ask-ai-border);
  background: var(--view-bg);
  border-radius: var(--ask-ai-pill-radius);
  box-shadow: var(--ask-ai-shadow-soft);
  padding: 0.38rem;
}

.ask-ai-query-input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 1rem;
  line-height: 1.45;
  padding: 0.55rem 0.78rem;
}

.ask-ai-query-input::placeholder {
  color: var(--text-tertiary);
}

.ask-ai-query-submit {
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: var(--accent);
  color: var(--bg-color);
  border-radius: var(--ask-ai-pill-radius);
  min-height: 42px;
  padding: 0.54rem 1.15rem;
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 640;
  letter-spacing: 0.01em;
  cursor: pointer;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.03),
    0 1px 2px rgba(0, 0, 0, 0.16);
  transition:
    transform 0.18s ease,
    opacity 0.18s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.ask-ai-query-submit:hover {
  opacity: 0.96;
  border-color: rgba(255, 255, 255, 0.16);
  transform: translateY(-1px);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.06),
    0 3px 8px rgba(0, 0, 0, 0.18);
}

.ask-ai-query-submit:active {
  transform: translateY(0) scale(0.985);
}

.ask-ai-query-submit:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 2px;
}

.ask-ai-query-input:focus,
.ask-ai-query-input:focus-visible {
  outline: none;
}

.ask-ai-query-form:focus-within {
  border-color: rgba(100, 180, 190, 0.38);
  box-shadow:
    0 0 0 2px rgba(100, 180, 190, 0.12),
    var(--ask-ai-shadow-soft);
}

.ask-ai-chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.ask-ai-chip {
  border: 1px solid var(--ask-ai-border);
  background: var(--view-bg);
  color: var(--text-secondary);
  border-radius: var(--ask-ai-pill-radius);
  padding: 0.42rem 0.82rem;
  font-family: var(--font-ui);
  font-size: 0.78rem;
  font-weight: 520;
  line-height: 1.2;
  cursor: pointer;
  transition:
    transform 0.18s ease,
    color 0.18s ease,
    border-color 0.18s ease,
    box-shadow 0.2s ease;
}

.ask-ai-chip:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
  transform: translateY(-1px);
  box-shadow: var(--ask-ai-shadow-soft);
}

.ask-ai-chip:active {
  transform: translateY(0) scale(0.985);
}

.ask-ai-chip:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 2px;
}

/* Provider Pills */
.ask-ai-providers {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  align-items: center;
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding-left: 0.82rem;
  gap: 0.16rem 0.28rem;
  opacity: 0;
  animation: askAiFadeUp 0.35s ease 0.18s forwards;
}

.ask-ai-provider-note {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-tertiary);
}

.ask-ai-provider-link {
  display: inline-flex;
  align-items: center;
  gap: 0.24rem;
  text-decoration: none;
  font-family: var(--font-ui);
  font-size: 0.76rem;
  font-weight: 560;
  letter-spacing: 0.01em;
  color: var(--text-tertiary);
  border-bottom: 1px solid transparent;
  transition:
    color 0.2s ease,
    border-color 0.2s ease,
    transform 0.2s ease;
}

.ask-ai-provider-link:hover {
  color: var(--text-secondary);
  border-color: var(--text-tertiary);
  transform: translateY(-1px);
}

.ask-ai-provider-link:active {
  transform: translateY(0);
}

.ask-ai-provider-link:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 2px;
  border-radius: 6px;
}

.ask-ai-provider-link-label {
  white-space: nowrap;
}

.ask-ai-provider-link-arrow {
  font-size: 0.92em;
  transition: transform 0.2s ease;
}

.ask-ai-provider-link:hover .ask-ai-provider-link-arrow {
  transform: translateX(2px);
}

.ask-ai-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  border: 1px solid var(--ask-ai-border);
  background: var(--view-bg);
  color: var(--text-primary);
  border-radius: var(--ask-ai-pill-radius);
  padding: 0.55rem 1.1rem;
  text-decoration: none;
  font-family: var(--font-ui);
  cursor: pointer;
  box-shadow: var(--ask-ai-shadow-soft);
  transition:
    transform 0.2s cubic-bezier(0.2, 0.8, 0.2, 1),
    box-shadow 0.2s ease,
    border-color 0.2s ease,
    background 0.2s ease;
}

.ask-ai-pill:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 2px;
}

.ask-ai-pill:hover {
  transform: translateY(-2px);
  box-shadow: var(--ask-ai-shadow);
  border-color: var(--text-tertiary);
}

.ask-ai-pill:active {
  transform: translateY(-1px) scale(0.98);
}

/* Icon wrap with brand circle */
.ask-ai-pill-icon-wrap {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.ask-ai-pill-icon-wrap[data-brand='chatgpt'] {
  background: #fff;
  color: #111;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.08);
}

.ask-ai-pill-icon-wrap[data-brand='claude'] {
  background: rgba(217, 119, 87, 0.1);
  color: #d97757;
}

.ask-ai-pill-icon-wrap[data-brand='gemini'] {
  background: rgba(66, 133, 244, 0.1);
  color: #4285f4;
}

.ask-ai-pill-icon-wrap[data-brand='grok'] {
  background: rgba(0, 0, 0, 0.08);
}

.ask-ai-pill-icon-wrap[data-brand='deepseek'] {
  background: rgba(77, 107, 254, 0.1);
  color: #4d6bfe;
}

.ask-ai-pill-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  transition: transform 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* ChatGPT hover icon animation */
[data-provider='chatgpt']:hover .ask-ai-pill-icon {
  animation: iconSpin 2s linear infinite;
}

@keyframes iconSpin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.ask-ai-pill-label {
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
}

/* Manual card (prompt + secondary providers) */
.ask-ai-manual-card {
  border: 1px solid var(--ask-ai-card-border);
  border-radius: var(--ask-ai-card-radius);
  background: var(--view-bg);
  box-shadow: var(--ask-ai-card-shadow);
  padding: 1.05rem 1.15rem;
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  opacity: 0;
  animation: askAiFadeIn 0.4s ease 0.25s forwards;
}

.ask-ai-manual-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.ask-ai-manual-summary-copy {
  flex: 1 1 auto;
  min-width: 0;
  display: grid;
  gap: 0.3rem;
}

.ask-ai-manual-summary-trigger {
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  margin: 0;
  padding: 0;
  cursor: pointer;
}

.ask-ai-manual-summary-trigger:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 3px;
  border-radius: 8px;
}

.ask-ai-manual-summary-trigger:hover .ask-ai-manual-header {
  color: var(--text-primary);
}

.ask-ai-manual-header {
  font-family: var(--font-ui);
  font-size: 0.98rem;
  font-weight: 620;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin: 0;
}

.ask-ai-manual-description {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  line-height: 1.45;
  color: var(--text-secondary);
  margin: 0;
}

.ask-ai-prompt-toggle {
  flex: 0 0 auto;
  border: 1px solid var(--ask-ai-border);
  border-radius: var(--ask-ai-pill-radius);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-size: 0.77rem;
  font-weight: 580;
  letter-spacing: 0.01em;
  padding: 0.44rem 0.82rem;
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  gap: 0.28rem;
  cursor: pointer;
  transition:
    color 0.16s ease,
    border-color 0.16s ease,
    transform 0.16s ease;
}

.ask-ai-prompt-toggle:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
  transform: translateY(-1px);
}

.ask-ai-prompt-toggle:active {
  transform: translateY(0) scale(0.985);
}

.ask-ai-prompt-toggle:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 2px;
}

.ask-ai-prompt-toggle-chevron {
  transform: translateY(-1px) rotate(0deg);
  transition: transform 0.2s ease;
}

.ask-ai-prompt-toggle[aria-expanded='true'] .ask-ai-prompt-toggle-chevron {
  transform: translateY(-1px) rotate(180deg);
}

.ask-ai-manual-content {
  display: grid;
  gap: 0.9rem;
  border-top: 1px solid var(--ask-ai-card-border);
  padding-top: 0.95rem;
}

.ask-ai-manual-content[hidden] {
  display: none;
}

.ask-ai-manual-topline {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.ask-ai-manual-secondary-header {
  font-family: var(--font-ui);
  font-size: 0.92rem;
  font-weight: 560;
  color: var(--text-secondary);
  margin: 0;
}

.ask-ai-prompt-wrap {
  position: relative;
  margin: 0;
}

.ask-ai-pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.82rem;
  justify-content: flex-start;
  align-items: center;
}

.ask-ai-brand-pill {
  gap: 0.35rem;
  padding: 0.43rem 0.72rem;
  min-height: 42px;
  border-radius: var(--ask-ai-pill-radius);
  background: var(--view-bg);
}

.ask-ai-brand-lockup {
  display: block;
  height: 20px;
  width: auto;
  transition:
    transform 0.18s ease,
    opacity 0.18s ease,
    filter 0.18s ease;
}

.ask-ai-brand-lockup.is-hidden {
  display: none;
}

.ask-ai-brand-pill:hover .ask-ai-brand-lockup {
  transform: translateY(-1px) scale(1.01);
  opacity: 0.9;
  filter: drop-shadow(0 1px 1px rgba(0, 0, 0, 0.12));
}

.ask-ai-brand-pill:active .ask-ai-brand-lockup {
  transform: scale(0.98);
  opacity: 0.85;
}

/* Copy-then-redirect feedback */
.ask-ai-pill.is-copied {
  border-color: var(--text-secondary);
}

.ask-ai-pill.is-copied .ask-ai-pill-label {
  opacity: 0.7;
}

.ask-ai-provider-status {
  display: none;
  font-family: var(--font-ui);
  font-size: 0.96rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  line-height: 1;
  white-space: nowrap;
}

.ask-ai-provider-status.is-visible {
  display: inline-block;
}

.ask-ai-pill.is-copied .ask-ai-provider-status {
  font-size: 1.07rem;
}

.ask-ai-copy {
  position: absolute;
  top: 0.58rem;
  right: 0.58rem;
  z-index: 1;
  border: 1px solid var(--ask-ai-border);
  background: transparent;
  color: var(--text-secondary);
  border-radius: var(--ask-ai-pill-radius);
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 640;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.4rem 0.82rem;
  cursor: pointer;
  transition:
    color 0.15s ease,
    border-color 0.15s ease;
}

.ask-ai-copy:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

.ask-ai-copy:active {
  transform: scale(0.97);
}

.ask-ai-copy:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 2px;
}

.ask-ai-prompt {
  border-radius: 12px;
  border: 1px solid var(--ask-ai-border);
  background: var(--bg-color);
  padding: 0.82rem 1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', monospace;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--text-secondary);
  max-height: 32vh;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.ask-ai-copy-feedback {
  min-height: 1.25rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-align: center;
  opacity: 0;
  transform: translateY(2px);
  transition:
    opacity 0.2s ease,
    transform 0.2s ease;
}

.ask-ai-copy-feedback.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes askAiFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes askAiFadeInMuted {
  from {
    opacity: 0;
  }
  to {
    opacity: 0.72;
  }
}

@keyframes askAiFadeUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 120;
  background: transparent;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2rem 5%;
  max-width: 1400px;
  margin: 0 auto;
}

.navbar::before {
  content: '';
  position: absolute;
  inset: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  background: var(--bg-color);
  z-index: -1;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link-button {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  padding: 0.2rem 0;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease;
  position: relative;
}

.nav-link-button:hover {
  color: var(--text-primary);
}

.brand {
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--text-primary);
}

.controls {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.action-controls {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.nav-divider {
  width: 1px;
  height: 1.5rem;
  background: var(--nav-divider);
}

.filter-bar {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 2.75rem var(--layout-inline-padding) 0.75rem;
}

.btn-text {
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color 0.2s;
  text-decoration: none;
}

.btn-text:hover {
  color: var(--text-primary);
}

.theme-switcher {
  position: relative;
}

.lang-switcher {
  display: inline-flex;
  align-items: center;
}

.lang-switcher.is-hidden {
  display: none;
}

.lang-toggle {
  border: 1px solid var(--card-border);
  background: var(--card-bg-hover);
  color: var(--text-tertiary);
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.4rem 0.75rem;
  width: 3.2rem;
  border-radius: 999px;
  cursor: pointer;
  text-align: center;
  transition:
    color 0.15s ease,
    border-color 0.15s ease;
}

.lang-toggle:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

.theme-trigger {
  border: 1px solid var(--card-border);
  background: var(--card-bg-hover);
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border-radius: 999px;
  cursor: pointer;
  transition:
    transform 0.25s cubic-bezier(0.2, 0.8, 0.2, 1),
    color 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.theme-trigger:hover {
  color: var(--text-primary);
  background: var(--card-bg-hover);
  border-color: transparent;
  transform: scale(1.02);
  box-shadow: var(--card-shadow-hover);
}

.theme-trigger:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 2px;
}

.theme-trigger-icon {
  position: relative;
  width: 18px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.theme-icon {
  width: 18px;
  height: 18px;
  display: none;
}

.theme-switcher[data-theme-state='dark'] .theme-icon-dark,
.theme-switcher[data-theme-state='light'] .theme-icon-light {
  display: block;
}

.ask-ai-entry {
  position: relative;
  border: 1px solid var(--card-border);
  background: var(--card-bg-hover);
  color: var(--text-secondary);
  height: 2.5rem;
  padding: 0 0.95rem 0 1.45rem;
  border-radius: 999px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  text-transform: uppercase;
  transition:
    transform 0.25s cubic-bezier(0.2, 0.8, 0.2, 1),
    color 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.ask-ai-entry::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: hsl(195, 50%, 55%);
  flex-shrink: 0;
}

.ask-ai-entry-label {
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.03em;
}

.ask-ai-entry:hover {
  color: var(--text-primary);
  background: var(--card-bg-hover);
  border-color: transparent;
  transform: scale(1.02);
  box-shadow: var(--card-shadow-hover);
}

.ask-ai-entry.is-active {
  color: var(--text-primary);
  border-color: var(--text-secondary);
  box-shadow: var(--card-shadow);
}

.ask-ai-entry.is-active::before {
  box-shadow: 0 0 0 3px rgba(100, 180, 190, 0.12);
}

.ask-ai-entry:active {
  transform: scale(0.98);
}

.ask-ai-entry:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 2px;
}

/* Filter Pills */
.filter-pills {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  min-height: 36px;
}

.filter-pills::-webkit-scrollbar {
  display: none;
}

.filter-pill {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.6rem 1.2rem;
  border-radius: 999px;
  /* Pill shape */
  font-family: var(--font-ui);
  font-size: 0.95rem;
  color: var(--pill-text);
  /* Inactive text color */
  transition: all 0.2s ease;
  white-space: nowrap;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  height: 36px;
  line-height: 1;
}

.filter-pill:hover {
  color: var(--pill-hover-text);
}

.filter-pill.active {
  background-color: var(--pill-active-bg);
  /* Beige/Tan pill color from image */
  color: var(--pill-active-text);
  font-weight: 500;
}

/* Grid */
/* List Container (formerly Grid) */
/* List Container (formerly Grid) */
.grid-container {
  display: flex;
  flex-direction: column;
  width: min(var(--content-max-width), 100%);
  margin: 0 auto;
  padding: var(--layout-gap) var(--layout-inline-padding) 3.5rem;
  gap: 0;
  opacity: 1;
  transform: none;
}

.year-section {
  margin-bottom: 2.5rem;
}

.year-section:last-child {
  margin-bottom: 0;
}

.year-heading {
  font-family: var(--font-ui);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  margin: 1.5rem 0 0;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--card-border);
}

.year-section:first-child .year-heading {
  margin-top: 0;
}

.year-posts {
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* List Item */
.card {
  background: none;
  border-radius: 0;
  padding: 1rem 0;
  cursor: pointer;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  min-height: auto;
  height: auto;
  border: none;
  border-bottom: 1px solid var(--card-border);
  margin-bottom: 0;
  position: relative;
  overflow: visible;
  text-decoration: none;
  color: inherit;
}

.card:last-child {
  margin-bottom: 0;
  border-bottom: none;
}

/* Date (right-aligned, short format) */
.card-date {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--text-tertiary);
  flex-shrink: 0;
  letter-spacing: 0.02em;
}

/* Title */
.card-title {
  font-family: var(--font-body);
  font-size: 1.4rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  flex: 1;
}

/* Category dot */
.card-title::before {
  content: '';
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--text-tertiary);
  margin-right: 0.55rem;
  vertical-align: 0.25em;
}

.card-content-wrapper {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  flex-direction: row;
  align-items: baseline;
  gap: 1rem;
  padding-right: 1.25rem;
}

/* Image in List View */
/* Image in List View */
.card-image {
  position: relative;
  width: 110px;
  /* Slightly smaller or square-ish */
  height: 76px;
  object-fit: cover;
  border-radius: 4px;
  opacity: 1;
  order: 2;
  flex-shrink: 0;
  display: block;
  margin-left: 1.25rem;
}

.card picture {
  display: block;
}

/* Pagination */
.pagination {
  max-width: 920px;
  margin: 0 auto 4rem;
  padding: 0 5%;
}

.pagination:empty {
  display: none;
}

.pagination.is-hidden {
  display: none;
}

.pagination-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.pagination-link {
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 500;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  border: 1px solid var(--card-border);
  transition:
    color 0.2s ease,
    border-color 0.2s ease,
    transform 0.2s ease;
}

.pagination-link:hover {
  transform: translateY(-1px);
  border-color: transparent;
  color: var(--text-secondary);
}

.pagination-link.is-disabled {
  opacity: 0.4;
  pointer-events: none;
}

.pagination-status {
  color: var(--text-tertiary);
  font-size: 0.85rem;
}

/* If no image, hidden by default opacity logic in JS? 
   Actually JS adds .card-image only if exists.
   But we need to handle .has-image class logic override 
*/

.card.has-image {
  padding: 1rem 0;
}

/* Ensure content wrapper flows normally */
.card.has-image .card-content-wrapper {
  position: relative;
  border-radius: 0;
  padding: 0;
  background: none;
  height: auto;
  flex: 1;
  /* Reset flex */
}

/* Image cards match standard style */
.card.has-image .card-title {
  color: var(--text-primary);
}

/* Category dot color selectors */
.card-title[data-cat='0']::before {
  background: var(--cat-0);
}

.card-title[data-cat='1']::before {
  background: var(--cat-1);
}

.card-title[data-cat='2']::before {
  background: var(--cat-2);
}

.card-title[data-cat='3']::before {
  background: var(--cat-3);
}

.card-title[data-cat='4']::before {
  background: var(--cat-4);
}

/* Filter bar row */
.filter-bar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

/* Search input */
.search-input {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  background: transparent;
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 0.45rem 0.75rem;
  width: 180px;
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.2s ease;
}

.search-input::placeholder {
  color: var(--text-tertiary);
}

.search-input:focus {
  border-color: var(--text-secondary);
}

/* Search empty state */
.search-empty {
  text-align: center;
  padding: 3rem;
  color: var(--text-tertiary);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--layout-gap);
  width: min(var(--content-max-width), 100%);
  margin: 0 auto;
  padding: 3.5rem var(--layout-inline-padding) 4rem;
  align-items: start;
  position: relative;
  z-index: 1;
}

.article-content {
  width: 100%;
  margin: 0;
  padding: 0;
}

.article-page {
  position: relative;
  min-height: auto;
}

.article-page::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: 0;
  bottom: 0;
  width: min(var(--content-max-width), 100%);
  background: var(--view-bg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  pointer-events: none;
  z-index: 0;
}

.article-date {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.sidebar-panel {
  position: static;
  width: 100%;
  font-family: var(--font-ui);
  color: var(--text-secondary);
}

.sidebar-title {
  display: none;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-tertiary);
  margin-bottom: 0.75rem;
}

.sidebar-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.sidebar-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  line-height: 1.5;
  font-weight: 600;
  transition: color 0.2s ease;
}

.sidebar-link:hover {
  color: var(--text-primary);
}

.article-toc {
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 0.75rem 0.75rem 0.85rem;
  background: var(--card-bg-hover);
}

.toc-toggle {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--card-border);
  background: var(--card-bg-hover);
  color: var(--text-primary);
  border-radius: 999px;
  padding: 0.6rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

.toc-toggle-icon {
  font-size: 0.9rem;
  opacity: 0.7;
}

.toc-panel {
  display: none;
  padding-top: 0.75rem;
}

.article-toc.is-open .toc-panel {
  display: block;
}

.toc-title {
  display: none;
}

.toc-list {
  gap: 0.5rem;
}

.toc-level-1 {
  font-weight: 600;
}

.toc-level-2 {
  margin-left: 0.5rem;
}

.toc-level-3 {
  margin-left: 1rem;
}

.toc-level-4 {
  margin-left: 1.5rem;
}

.article-hero {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 2rem;
  line-height: 1.1;
}

.article-meta {
  color: var(--text-secondary);
  margin-bottom: 3rem;
  display: flex;
  gap: 1rem;
  font-size: 0.9rem;
}

.article-body {
  font-family: var(--font-body);
  font-size: 1.25rem;
  line-height: 1.8;
  color: var(--text-primary);
  /* was #333 */
}

.article-body p {
  margin-bottom: 1.5rem;
}

.article-body ul,
.article-body ol {
  margin: 0 0 1.5rem 1.5rem;
  padding-left: 1.1rem;
}

.article-body li {
  margin: 0.35rem 0;
}

.article-body ul ul,
.article-body ol ol,
.article-body ul ol,
.article-body ol ul {
  margin: 0.4rem 0 0.6rem 1.2rem;
}

.article-body blockquote {
  margin: 1.5rem 0;
  padding: 0.9rem 1.1rem;
  border-left: 3px solid var(--text-tertiary);
  background: var(--card-bg-hover);
  color: var(--text-secondary);
  border-radius: 10px;
}

.article-body blockquote p {
  margin: 0;
}

.article-body blockquote.callout {
  border: 1px solid var(--callout-border);
  border-radius: 12px;
  background: var(--callout-bg);
  padding: 1.1rem 1.2rem;
}

.article-body blockquote.callout > p:first-child {
  margin: 0 0 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
}

.article-body blockquote.callout > p:last-child {
  margin-bottom: 0;
}

.article-body blockquote.callout ul,
.article-body blockquote.callout ol {
  margin-bottom: 0;
}

.article-body h1,
.article-body h2,
.article-body h3,
.article-body h4,
.article-body h5,
.article-body h6 {
  scroll-margin-top: var(--sidebar-sticky-top);
}

.article-body pre {
  margin: 1.5rem 0;
  border-radius: 12px;
  overflow: auto;
}

.article-body code {
  font-family:
    'SFMono-Regular', Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
  font-size: 0.95rem;
}

.article-body pre code {
  font-size: 0.95rem;
}

.article-body :not(pre) > code {
  background: var(--card-bg-hover);
  border: 1px solid var(--card-border);
  border-radius: 6px;
  padding: 0.1rem 0.35rem;
  color: var(--text-primary);
}

.article-body pre.hljs {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  color: var(--code-text);
  padding: 1rem 1.1rem;
}

.article-body pre.hljs code {
  color: inherit;
}

.article-body pre.hljs .hljs-comment,
.article-body pre.hljs .hljs-quote {
  color: var(--code-comment);
}

.article-body pre.hljs .hljs-keyword,
.article-body pre.hljs .hljs-selector-tag,
.article-body pre.hljs .hljs-literal {
  color: var(--code-keyword);
}

.article-body pre.hljs .hljs-string,
.article-body pre.hljs .hljs-doctag {
  color: var(--code-string);
}

.article-body pre.hljs .hljs-number,
.article-body pre.hljs .hljs-regexp {
  color: var(--code-number);
}

.article-body pre.hljs .hljs-title,
.article-body pre.hljs .hljs-section,
.article-body pre.hljs .hljs-function .hljs-title {
  color: var(--code-title);
}

.article-body pre.hljs .hljs-built_in,
.article-body pre.hljs .hljs-type {
  color: var(--code-built-in);
}

.article-body pre.hljs .hljs-attr,
.article-body pre.hljs .hljs-attribute {
  color: var(--code-attr);
}

.article-body pre.hljs .hljs-symbol,
.article-body pre.hljs .hljs-bullet {
  color: var(--code-symbol);
}

.article-body .katex-display {
  margin: 1.5rem 0;
  overflow-x: auto;
  overflow-y: hidden;
}

.article-body picture {
  display: block;
  margin: 1.5rem 0;
}

.article-body img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
}

.article-body img.is-previewable,
.article-cover img.is-previewable {
  cursor: zoom-in;
}

body.image-preview-open {
  overflow: hidden;
}

.image-preview-modal {
  position: fixed;
  inset: 0;
  z-index: 1200;
  padding: clamp(0.8rem, 1.4vw, 1.25rem);
  background: rgba(10, 10, 10, 0.88);
  display: grid;
  place-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
}

.image-preview-modal.is-open {
  opacity: 1;
  pointer-events: auto;
}

.image-preview-modal.is-closing {
  opacity: 0;
  pointer-events: none;
}

.image-preview-frame {
  width: min(96vw, 1800px);
  max-height: calc(100vh - 2.5rem);
  display: grid;
  justify-items: center;
  align-items: center;
}

.image-preview-image {
  max-width: 100%;
  max-height: calc(100vh - 5.2rem);
  object-fit: contain;
  border-radius: 10px;
  box-shadow: 0 18px 46px rgba(0, 0, 0, 0.32);
  transition: opacity 0.12s ease;
}

.image-preview-image.is-hidden-during-open {
  opacity: 0;
}

.image-preview-ghost {
  position: fixed;
  z-index: 1210;
  object-fit: cover;
  pointer-events: none;
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.25);
}

.image-preview-nav {
  position: fixed;
  bottom: 1rem;
  border: 0;
  width: clamp(2.2rem, 2.5vw, 2.8rem);
  height: clamp(2.2rem, 2.5vw, 2.8rem);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.22);
  color: #fff;
  cursor: pointer;
  z-index: 1215;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.image-preview-nav-prev {
  left: calc(50% - 3.3rem);
}

.image-preview-nav-next {
  right: calc(50% - 3.3rem);
}

.image-preview-nav-icon {
  font-size: 1.75rem;
  line-height: 1;
  transform: translateY(-0.08em);
}

.image-preview-nav:hover {
  background: rgba(255, 255, 255, 0.32);
}

.image-preview-nav:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.image-preview-nav:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.image-preview-caption {
  margin-top: 0.7rem;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.92rem;
  text-align: center;
  max-width: min(92vw, 840px);
  text-wrap: balance;
}

.image-preview-close {
  position: fixed;
  top: clamp(0.65rem, 1.2vw, 1rem);
  right: clamp(0.65rem, 1.2vw, 1rem);
  border: 0;
  width: 2.45rem;
  height: 2.45rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 1.9rem;
  line-height: 1;
  cursor: pointer;
}

.image-preview-close:hover {
  background: rgba(255, 255, 255, 0.3);
}

.image-preview-close:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

@media (max-width: 720px) {
  .image-preview-nav {
    bottom: 0.9rem;
  }

  .image-preview-nav-prev {
    left: calc(50% - 3.15rem);
  }

  .image-preview-nav-next {
    right: calc(50% - 3.15rem);
  }

  .image-preview-caption {
    margin-bottom: 3.2rem;
  }
}

.article-body img.is-tall {
  max-height: 40vh;
  width: auto;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

.article-body th,
.article-body td {
  border: 1px solid var(--table-border);
  padding: 0.6rem 0.8rem;
  vertical-align: top;
}

.article-body th {
  background: var(--table-header-bg);
  font-weight: 600;
  text-align: left;
}

/* Article Cover Image */
.article-cover {
  position: relative;
  width: 100vw;
  margin-left: calc(-50vw + 50%);
  margin-top: -0.75rem;
  height: 50vh;
  min-height: 300px;
  max-height: 500px;
  overflow: hidden;
}

.article-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-cover-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60%;
  background: linear-gradient(
    to bottom,
    transparent 0%,
    rgba(255, 255, 255, 0.3) 40%,
    var(--bg-color) 100%
  );
  pointer-events: none;
}

[data-theme='dark'] .article-cover-overlay {
  background: linear-gradient(to bottom, transparent 0%, rgba(17, 17, 17, 0.3) 40%, #111 100%);
}

.article-text-content {
  max-width: var(--content-max-width);
  margin: 0;
  padding: 0;
}

/* Adjust article-content when cover exists */
.article-content:has(.article-cover) {
  max-width: 100%;
  margin-top: 0;
  padding: 0;
}

.article-content:has(.article-cover) .article-text-content {
  margin-top: -4rem;
  position: relative;
  z-index: 2;
}

/* About Page Profile Sidebar */
.article-profile {
  width: 100%;
}

.article-profile-inner {
  display: block;
}

.article-profile .about-social {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  width: min(100%, 184px);
  margin: 0 auto;
  gap: 0.5rem;
}

.article-profile .about-social-title {
  display: block;
  width: 100%;
  margin-bottom: 0.15rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--card-border);
}

.article-profile .about-social-list {
  width: 100%;
  gap: 0.5rem;
}

.article-profile .about-social-item {
  width: 100%;
}

.article-profile .about-social-link {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.45rem;
  width: 100%;
  height: auto;
  padding: 0;
  border-radius: 0;
  border: none;
}

.about-social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.article-profile .about-social-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.article-profile .about-social-icon svg {
  width: 16px;
  height: 16px;
}

.article-profile .about-social-link-text {
  display: inline;
  white-space: nowrap;
}

@media (max-width: 768px) {
  .article-body img.is-tall {
    max-height: 50vh;
  }
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(5px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (min-width: 1440px) {
  .article-layout {
    padding-left: var(--layout-desktop-inline-padding);
    padding-right: var(--layout-desktop-inline-padding);
  }

  .article-layout.has-toc .article-toc,
  .article-layout.has-profile .article-profile,
  .article-layout.has-toc .article-content,
  .article-layout.has-profile .article-content {
    grid-column: 1;
    grid-row: 1;
  }

  .article-layout.has-toc .article-toc,
  .article-layout.has-profile .article-profile {
    position: sticky;
    top: var(--sidebar-sticky-top);
    width: var(--sidebar-width);
    align-self: start;
    margin-left: calc(
      (var(--sidebar-width) + var(--layout-desktop-inline-padding) + var(--layout-gap)) * -1
    );
    z-index: 2;
  }

  .article-layout.has-toc .article-toc {
    border: none;
    border-radius: 0;
    padding: 0;
    background: transparent;
  }

  .article-layout.has-toc .toc-toggle {
    display: none;
  }

  .article-layout.has-toc .toc-panel {
    display: block;
    padding-top: 0.25rem;
  }

  .article-layout.has-toc .toc-title {
    display: block;
  }
}

@media (max-width: 1439px) {
  .article-profile {
    margin-bottom: 0;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--card-border);
  }

  .article-profile .about-social-title {
    display: none;
  }

  .article-profile .about-social {
    width: 100%;
  }

  .article-profile .about-social-list {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 0.4rem;
  }

  .article-profile .about-social-item {
    width: auto;
  }

  .article-profile .about-social-link {
    width: auto;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.3rem 0.65rem;
    border-radius: 9999px;
    border: 1px solid var(--card-border);
  }
}

/* Responsive */
@media (max-width: 900px) {
  :root {
    --nav-height: 5rem;
  }

  .navbar {
    align-items: flex-start;
    gap: 1rem;
    padding: 1.75rem 22px 1.25rem;
  }

  .nav-left {
    flex: 1 1 auto;
    min-width: 0;
    display: grid;
    gap: 0.45rem;
  }

  .brand {
    white-space: nowrap;
  }

  .controls {
    flex: 0 0 auto;
  }

  .filter-bar {
    padding: 2.4rem 4% 0.65rem;
  }

  .article-layout {
    gap: 1.5rem;
    padding: 2.5rem 6% 3rem;
  }

  .article-hero {
    font-size: 2.2rem;
  }

  .ask-ai-shell {
    width: min(840px, 94%);
    gap: 1.35rem;
  }
}

@media (max-width: 600px) {
  :root {
    --nav-height: 4.5rem;
  }

  .navbar {
    padding: 1.5rem 22px 1rem;
  }

  .nav-links {
    gap: 0.5rem;
  }

  .nav-links .nav-link-button {
    font-size: 0.85rem;
  }

  .filter-bar {
    padding: 2.1rem 6% 0.75rem;
  }

  .filter-bar-row {
    flex-direction: column;
    align-items: stretch;
  }

  .search-input {
    width: 100%;
  }

  .filter-pills {
    width: 100%;
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding-bottom: 0.25rem;
  }

  .filter-pills::-webkit-scrollbar {
    display: none;
  }

  .action-controls {
    justify-content: flex-end;
    gap: 0.5rem;
  }

  .ask-ai-entry {
    padding: 0 0.75rem 0 1.2rem;
  }

  .ask-ai-entry-label {
    font-size: 0.67rem;
  }

  .grid-container {
    padding: 1.25rem 6% 3rem;
  }

  .card {
    padding: 0.75rem 0;
  }

  .card-content-wrapper {
    padding-right: 0;
  }

  .card picture {
    order: -1;
    width: 100%;
    margin-bottom: 1rem;
  }

  .card-image {
    width: 100%;
    height: 140px;
    margin: 0;
  }

  .article-content {
    margin: 3.5rem auto 3rem;
    padding: 0 1.25rem;
  }

  .article-layout.has-profile .article-content {
    margin-top: 0.75rem;
  }

  .article-hero {
    font-size: 1.9rem;
  }

  body[data-page='ask-ai'] .ask-ai-page {
    padding: 1.1rem 0 3rem;
  }

  .ask-ai-shell {
    width: min(100%, 94%);
    gap: 1.2rem;
  }

  .ask-ai-hero {
    gap: 0.62rem;
    padding-top: 0.25rem;
  }

  .ask-ai-subtitle {
    font-size: 0.95rem;
  }

  .ask-ai-trust {
    font-size: 0.69rem;
    padding: 0.26rem 0.55rem;
    gap: 0.3rem;
  }

  .ask-ai-query-form {
    gap: 0.4rem;
    padding: 0.34rem;
  }

  .ask-ai-query-input {
    font-size: 0.94rem;
    padding: 0.5rem 0.6rem;
  }

  .ask-ai-query-submit {
    min-height: 38px;
    padding: 0.46rem 0.88rem;
    font-size: 0.82rem;
  }

  .ask-ai-chip-list {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    gap: 0.45rem;
    padding-bottom: 0.15rem;
  }

  .ask-ai-chip-list::-webkit-scrollbar {
    display: none;
  }

  .ask-ai-chip {
    flex: 0 0 auto;
    white-space: nowrap;
    font-size: 0.74rem;
    padding: 0.36rem 0.72rem;
  }

  .ask-ai-providers {
    padding-left: 0.72rem;
    gap: 0.16rem 0.32rem;
  }

  .ask-ai-provider-note,
  .ask-ai-provider-link {
    font-size: 0.74rem;
  }

  .ask-ai-provider-link {
    letter-spacing: 0;
  }

  .ask-ai-prompt-toggle {
    font-size: 0.74rem;
    min-height: 34px;
    padding: 0.38rem 0.72rem;
  }

  .ask-ai-manual-card {
    padding: 0.9rem;
  }

  .ask-ai-manual-summary {
    align-items: flex-start;
    flex-direction: column;
  }

  .ask-ai-manual-summary-copy {
    width: 100%;
  }

  .ask-ai-prompt-toggle {
    align-self: flex-start;
  }

  .ask-ai-manual-topline {
    gap: 0.68rem;
  }

  .ask-ai-manual-secondary-header {
    font-size: 0.86rem;
  }

  .ask-ai-pill-group {
    justify-content: flex-start;
    margin-top: 0;
    gap: 0.62rem;
  }

  .ask-ai-brand-pill {
    min-height: 38px;
    padding: 0.36rem 0.62rem;
  }

  .ask-ai-brand-lockup {
    height: 18px;
  }

  .ask-ai-pill.is-copied .ask-ai-provider-status {
    font-size: 1.02rem;
  }

  .ask-ai-prompt-wrap {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
  }

  .ask-ai-copy {
    position: static;
    align-self: flex-end;
  }

  .ask-ai-prompt {
    max-height: 46vh;
    font-size: 0.78rem;
    padding: 0.82rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ask-ai-entry,
  .ask-ai-entry::after,
  .ask-ai-pill,
  .ask-ai-pill-icon,
  .ask-ai-query,
  .ask-ai-query-submit,
  .ask-ai-chip,
  .ask-ai-provider-link,
  .ask-ai-providers,
  .ask-ai-kicker,
  .ask-ai-title,
  .ask-ai-subtitle,
  .ask-ai-manual-card,
  .ask-ai-copy,
  .ask-ai-copy-feedback {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
  }

  .ask-ai-pill:hover,
  .ask-ai-pill:active,
  .ask-ai-chip:hover,
  .ask-ai-chip:active,
  .ask-ai-provider-link:hover,
  .ask-ai-provider-link:active,
  .ask-ai-entry:hover,
  .ask-ai-entry:active,
  .ask-ai-query-submit:hover,
  .ask-ai-query-submit:active,
  .ask-ai-copy:hover,
  .ask-ai-copy:active {
    transform: none !important;
  }

  .ask-ai-brand-lockup,
  .ask-ai-provider-link-arrow,
  .ask-ai-provider-status {
    transition: none !important;
  }
}

/* ---------- Comments ---------- */

.citation-section {
  border-top: 1px solid var(--card-border);
  padding-top: 2.1rem;
  margin-top: 2.1rem;
}

.citation-section:empty {
  display: none;
}

.citation-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.75rem;
}

.citation-label {
  font-family: var(--font-ui);
  font-size: 0.66rem;
  font-weight: 500;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.citation-toggle {
  border: 1px solid var(--card-border);
  border-radius: 999px;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-size: 0.72rem;
  font-weight: 500;
  line-height: 1;
  cursor: pointer;
  padding: 0.37rem 0.72rem;
  transition:
    border-color 0.15s ease,
    color 0.15s ease;
}

.citation-toggle:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

.citation-blocks {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.citation-blocks[hidden] {
  display: none;
}

.citation-block {
  border: 1px solid var(--card-border);
  border-radius: 10px;
  background: var(--card-bg-hover);
  padding: 0.7rem;
}

.citation-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 0.45rem;
}

.citation-format {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--text-secondary);
}

.citation-copy {
  border: 1px solid var(--card-border);
  border-radius: 999px;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 500;
  line-height: 1;
  cursor: pointer;
  padding: 0.34rem 0.72rem;
  transition:
    border-color 0.15s ease,
    color 0.15s ease,
    background-color 0.15s ease;
}

.citation-copy:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

.citation-copy.is-copied {
  border-color: var(--text-primary);
  background: var(--text-primary);
  color: var(--bg-color);
}

.citation-code {
  margin: 0;
  font-family: ui-monospace, 'SFMono-Regular', Menlo, Consolas, 'Liberation Mono', monospace;
  font-size: 0.72rem;
  line-height: 1.48;
  color: var(--code-text);
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 8px;
  padding: 0.55rem 0.66rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.citation-section + .comment-section {
  margin-top: 1.9rem;
}

.comment-section {
  border-top: 1px solid var(--card-border);
  padding: 3rem 0 2.5rem;
  margin-top: 3rem;
}

.comment-section:empty {
  display: none;
}

.comment-label {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.5rem;
}

.comment-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.comment {
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--card-border);
}

.comment:last-child {
  border-bottom: none;
}

.comment-header {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 0.35rem;
}

.comment-author {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
}

.comment-date {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.comment-body {
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-primary);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.comment-reply-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--text-tertiary);
  padding: 0.25rem 0;
  margin-top: 0.25rem;
  transition: color 0.15s ease;
}

.comment-reply-btn:hover {
  color: var(--text-primary);
}

.comment-replies {
  margin-left: 1.25rem;
  padding-left: 1.25rem;
  border-left: 1px solid var(--card-border);
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.comment-child {
  padding-bottom: 0;
  border-bottom: none;
}

.comment-empty {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: var(--text-tertiary);
  margin-bottom: 1.5rem;
}

.comment-load-more {
  background: none;
  border: 1px solid var(--card-border);
  border-radius: 999px;
  cursor: pointer;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding: 0.45rem 1.25rem;
  margin-bottom: 1.5rem;
  transition:
    color 0.15s ease,
    border-color 0.15s ease;
}

.comment-load-more:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

.comment-load-more:disabled {
  opacity: 0.5;
  cursor: default;
}

.comment-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.comment-reply-form {
  margin-top: 1rem;
}

.comment-form-row {
  display: flex;
  gap: 0.75rem;
}

.comment-input {
  flex: 1;
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 500;
  background: transparent;
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  color: var(--text-primary);
  outline: none;
  transition:
    border-color 0.15s ease,
    box-shadow 0.15s ease;
}

.comment-input::placeholder {
  color: var(--text-tertiary);
}

.comment-input:focus {
  border-color: var(--text-secondary);
  box-shadow: 0 0 0 2px var(--focus-ring);
}

.comment-textarea {
  font-family: var(--font-body);
  font-size: 0.9rem;
  background: transparent;
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 0.6rem 0.75rem;
  color: var(--text-primary);
  outline: none;
  resize: vertical;
  min-height: 4.5rem;
  transition:
    border-color 0.15s ease,
    box-shadow 0.15s ease;
}

.comment-textarea::placeholder {
  color: var(--text-tertiary);
}

.comment-textarea:focus {
  border-color: var(--text-secondary);
  box-shadow: 0 0 0 2px var(--focus-ring);
}

.comment-form-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.comment-hint {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-top: -0.25rem;
}

.comment-submit {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 500;
  background: var(--text-primary);
  color: var(--bg-color);
  border: none;
  border-radius: 999px;
  padding: 0.5rem 1.25rem;
  cursor: pointer;
  transition:
    opacity 0.15s ease,
    transform 0.15s ease;
}

.comment-submit:hover {
  opacity: 0.85;
}

.comment-submit:disabled {
  opacity: 0.5;
  cursor: default;
}

.comment-cancel {
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--text-tertiary);
  padding: 0.5rem 0;
  transition: color 0.15s ease;
}

.comment-cancel:hover {
  color: var(--text-primary);
}

.comment-pending {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--text-secondary);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 0.65rem 1rem;
  margin-top: 0.75rem;
  opacity: 0;
  transform: translateY(-2px);
  transition:
    opacity 0.2s ease,
    transform 0.2s ease;
}

.comment-pending.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.comment-pending-inline {
  margin-top: 0.5rem;
}

@media (max-width: 600px) {
  .citation-toolbar {
    gap: 0.5rem;
  }

  .citation-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .comment-form-row {
    flex-direction: column;
  }
}