/* ============================================================
   Jutool — Authentic Anthropic Editorial Design System
   Directly mapped from Anthropic's official production tokens (ant-brand)
   ============================================================ */

:root {
  color-scheme: light;

  /* ---- Anthropic Official Production Swatches ---- */
  --color-bg-base:        #FAF9F5;  /* Anthropic --swatch--ivory-light */
  --color-bg-raised:      #F0EEE6;  /* Anthropic --swatch--ivory-medium */
  --color-bg-overlay:     #FFFFFF;  /* Anthropic --swatch--white */
  --color-bg-inverted:    #141413;  /* Anthropic --swatch--slate-dark */

  --color-text-primary:   #141413;  /* Anthropic --swatch--slate-dark (WCAG AAA 17.8:1) */
  --color-text-secondary: #5E5D59;  /* Anthropic --swatch--slate-light (WCAG AA 5.8:1) */
  --color-text-muted:     #87867F;  /* Anthropic --swatch--cloud-dark */
  --color-text-inverted:  #FAF9F5;
  --color-text-link:      #C6613F;  /* Anthropic --swatch--accent */

  --color-border-default: #E8E6DC;  /* Anthropic --swatch--ivory-dark */
  --color-border-subtle:  #F0EEE6;
  --color-border-strong:  #D1CFC5;  /* Anthropic --swatch--cloud-light */
  --color-border-oat:     #E3DACC;  /* Anthropic --swatch--oat */

  --color-accent:         #D97757;  /* Anthropic --swatch--clay */
  --color-accent-hover:   #C6613F;  /* Anthropic --swatch--accent */
  --color-accent-btn:     #B84D29;  /* High-contrast clay for white text buttons (4.6:1) */
  --color-accent-soft:    rgba(217, 119, 87, 0.08);

  --color-success:        #5B7A42;  /* Anthropic muted olive */
  --color-warning:        #B57A22;
  --color-error:          #B83B30;

  /* Compatibility aliases */
  --color-muted:  var(--color-text-muted);
  --color-border: var(--color-border-default);
  --color-card:   var(--color-bg-overlay);

  /* ---- Typography Hierarchy (Anthropic Font Stack) ---- */
  --font-display: 'Lora', "Noto Serif SC", "Source Han Serif SC", "Songti SC", STSong, "SimSun", Georgia, serif;
  --font-heading: 'Lora', "Noto Serif SC", "Source Han Serif SC", "Songti SC", STSong, "SimSun", Georgia, serif;
  --font-body:    'Lora', "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
  --font-ui:      "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, Menlo, Consolas, "PingFang SC", monospace;

  --text-xs: 0.75rem;   /* 12px */
  --text-sm: 0.84375rem;/* 13.5px */
  --text-base: 0.9375rem;/* 15px */
  --text-md: 1.0625rem; /* 17px */
  --text-lg: 1.25rem;   /* 20px */
  --text-xl: 1.5rem;    /* 24px */
  --text-2xl: 2rem;     /* 32px */
  --text-3xl: 2.5rem;   /* 40px */
  --text-4xl: 3.25rem;  /* 52px */

  --weight-light: 300; --weight-regular: 400; --weight-medium: 500;
  --weight-semibold: 600; --weight-bold: 700;

  --leading-tight: 1.15;
  --leading-snug: 1.35;
  --leading-normal: 1.6;
  --leading-loose: 1.75;

  /* ---- Spacing Scale (4px / 8px grid) ---- */
  --space-1: 4px;   --space-2: 8px;   --space-3: 12px;
  --space-4: 16px;  --space-5: 20px;  --space-6: 24px;
  --space-8: 32px;  --space-10: 40px; --space-12: 48px;
  --space-16: 64px; --space-20: 80px; --space-32: 128px;

  /* ---- Layout & Radii (Warm & Refined Standard) ---- */
  --max-width-prose: 680px;
  --max-width-text: 860px;
  --max-width-layout: 1200px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* ---- Motion ---- */
  --ease-default: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast:   140ms;
  --duration-normal: 220ms;
  --duration-slow:   340ms;

  /* ---- Anthropic Restrained Shadows ---- */
  --shadow-card:     0 1px 3px rgba(20, 20, 19, 0.03), 0 1px 2px rgba(20, 20, 19, 0.02);
  --shadow-elevated: 0 8px 24px -4px rgba(20, 20, 19, 0.06), 0 2px 6px -1px rgba(20, 20, 19, 0.03);
  --shadow-btn:      0 1px 2px rgba(0, 0, 0, 0.08);
}

/* ---- Anthropic Dark Mode (Warm Obsidian) ---- */
[data-theme="dark"] {
  color-scheme: dark;
  --color-bg-base:        #141413;  /* Anthropic dark base */
  --color-bg-raised:      #1D1D1B;  /* Anthropic dark raised */
  --color-bg-overlay:     #242321;  /* Anthropic dark card */
  --color-bg-inverted:    #FAF9F5;

  --color-text-primary:   #FAF9F5;  /* Pure ivory */
  --color-text-secondary: #9E9C94;  /* Muted warm slate (contrast > 5.5:1) */
  --color-text-muted:     #706E66;
  --color-text-inverted:  #141413;
  --color-text-link:      #E07B5C;

  --color-border-default: #2D2C28;
  --color-border-subtle:  #22211E;
  --color-border-strong:  #45433E;
  --color-border-oat:     #35332F;

  --color-accent:         #DE7A5A;  /* Vibrant clay for dark backgrounds */
  --color-accent-hover:   #EB8969;
  --color-accent-btn:     #DE7A5A;
  --color-accent-soft:    rgba(222, 122, 90, 0.12);

  --color-success:        #7EA85B;
  --color-error:          #D95A4E;

  --shadow-card:     0 1px 3px rgba(0, 0, 0, 0.35);
  --shadow-elevated: 0 10px 30px -4px rgba(0, 0, 0, 0.5);
  --shadow-btn:      0 1px 2px rgba(0, 0, 0, 0.2);
}

/* ============ Reset & Base ============ */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(64px + var(--space-4));
}
body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  background-color: var(--color-bg-base);
  color: var(--color-text-primary);
  font-family: var(--font-ui);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--duration-normal) ease, color var(--duration-normal) ease;
}
p, h1, h2, h3, h4, h5, h6 { margin: 0; overflow-wrap: break-word; }
h1, h2, h3, h4 { font-family: var(--font-display); }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; background: none; border: none; outline: none; appearance: none; }
button { touch-action: manipulation; }
a, button { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; border-radius: var(--radius-sm); }

/* ============ Layout ============ */
.page-container {
  width: 100%; max-width: var(--max-width-layout);
  margin: 0 auto; padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
}
.wrap { max-width: var(--max-width-text); margin: 0 auto; padding-inline: var(--space-5); }

/* ============ Header & Navigation ============ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 249, 245, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border-default);
  transition: background var(--duration-normal) ease, border-color var(--duration-normal) ease;
}
[data-theme="dark"] .site-header {
  background: rgba(20, 20, 19, 0.92);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-6); min-height: 64px;
}
.logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  display: inline-flex; align-items: center; gap: 8px;
  text-decoration: none;
}
.logo-mark {
  width: 22px; height: 22px;
  flex-shrink: 0;
  display: inline-block;
}
.logo em { font-style: italic; color: var(--color-accent); font-weight: 400; }

.menu { display: flex; align-items: center; gap: var(--space-2); }
.menu a {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: color var(--duration-fast), background var(--duration-fast);
}
.menu a:hover { color: var(--color-text-primary); background: var(--color-bg-raised); }

.theme-btn {
  width: 36px; height: 36px;
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-sm);
  background: var(--color-bg-overlay);
  color: var(--color-text-secondary);
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: color var(--duration-fast), border-color var(--duration-fast), background var(--duration-fast);
}
.theme-btn:hover { color: var(--color-accent); border-color: var(--color-accent); background: var(--color-bg-raised); }

.nav-cta {
  display: inline-flex; align-items: center; justify-content: center;
  white-space: nowrap; flex-shrink: 0;
  height: 36px; padding: 0 var(--space-4);
  background: var(--color-text-primary); color: var(--color-bg-base) !important;
  border-radius: var(--radius-full); font-size: var(--text-xs); font-weight: 500;
  box-shadow: var(--shadow-btn);
  transition: opacity var(--duration-fast), transform var(--duration-fast);
}
.nav-cta:hover { opacity: 0.9; transform: translateY(-1px); }

@media (max-width: 640px) {
  .nav-cta { display: none !important; }
}

/* ============ Hero Section ============ */
.hero {
  padding-block: clamp(var(--space-12), 7vw, var(--space-24));
  background: var(--color-bg-base);
  border-bottom: 1px solid var(--color-border-default);
}
.hero__inner { max-width: 720px; display: flex; flex-direction: column; gap: var(--space-4); }
.hero__badge {
  align-self: flex-start;
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--color-accent);
  background: transparent;
  padding: 0;
  margin-bottom: 4px;
}
.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.025em;
  text-wrap: balance;
  color: var(--color-text-primary);
}
.hero__title em { font-style: italic; color: var(--color-accent); font-weight: 400; }
.hero__body {
  font-family: var(--font-display);
  font-size: clamp(15px, 1.5vw, 17.5px);
  line-height: 1.6;
  color: var(--color-text-secondary);
  max-width: 54ch;
}
.hero__actions { display: flex; flex-direction: column; gap: var(--space-3); align-items: flex-start; margin-top: var(--space-2); }

/* Anthropic Search Bar */
.hero__search { width: 100%; max-width: 500px; position: relative; }
.hero__search svg { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--color-text-muted); }
.hero__search input {
  width: 100%; min-height: 48px; padding: 0 var(--space-5) 0 42px;
  font-family: var(--font-ui); font-size: 14px;
  background: var(--color-bg-overlay); color: var(--color-text-primary);
  border: 1px solid var(--color-border-default); border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast);
}
.hero__search input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}
.hero__search input::placeholder { color: var(--color-text-muted); }

/* Trending Tags (No Emojis, Pure Dignified Typography) */
.hero__quick-tags {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 12px;
  color: var(--color-text-muted);
}
.quick-tag-label {
  font-weight: 500;
  font-family: var(--font-ui);
  margin-right: 2px;
}
.quick-tag {
  padding: 3px 9px;
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-bg-overlay);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--duration-fast) ease;
}
.quick-tag:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: var(--color-bg-raised);
}

/* ============ Anthropic Clean Typographic Category Tabs ============ */
.category-tabs {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: var(--space-8) 0 var(--space-5);
  overflow-x: auto;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--color-border-default);
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.category-tabs::-webkit-scrollbar { display: none; }

.cat-tab {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px 12px;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--duration-fast) ease, border-bottom-color var(--duration-fast) ease;
}
.cat-tab:hover {
  color: var(--color-text-primary);
}
.cat-tab.active {
  color: var(--color-text-primary) !important;
  border-bottom-color: var(--color-accent) !important;
  font-weight: 600;
}
.cat-tab .tab-count {
  font-size: 11px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  min-height: 42px; padding: 9px var(--space-5); cursor: pointer;
  font-family: var(--font-ui);
  font-size: 13px; font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background var(--duration-fast), transform var(--duration-fast), opacity var(--duration-fast);
}
.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--color-accent-btn); color: #FFFFFF !important;
  box-shadow: var(--shadow-btn);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}
div[style*="display:flex"] > .btn-primary { width: auto; }

.btn-secondary {
  background: var(--color-bg-overlay); color: var(--color-text-primary);
  border: 1px solid var(--color-border-default);
}
.btn-secondary:hover { border-color: var(--color-accent); color: var(--color-accent); }

.btn-ghost {
  width: 100%; min-height: 42px; padding: 8px;
  background: transparent; border: 1px dashed var(--color-border-default);
  border-radius: var(--radius-sm);
  color: var(--color-accent); font-size: 13px; font-weight: 500;
  cursor: pointer;
  transition: background var(--duration-fast), border-color var(--duration-fast);
}
.btn-ghost:hover { background: var(--color-accent-soft); border-color: var(--color-accent); }

/* ============ Anthropic Editorial Tool Cards ============ */
.grid,
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-4);
}

.card-link {
  position: relative;
  padding: 18px 20px;
  background: var(--color-bg-overlay);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-2);
  box-shadow: var(--shadow-card);
  transition: border-color var(--duration-fast) ease,
              box-shadow var(--duration-fast) ease,
              transform var(--duration-fast) ease;
}
.card-link:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-elevated);
  border-color: var(--color-accent);
}
[data-theme="dark"] .card-link {
  background: var(--color-bg-overlay);
}

/* Category Monospace Subtitle inside Card */
.card-link__icon {
  display: none; /* Clean typography focus */
}
.card-link::before {
  content: attr(data-category);
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  font-weight: 500;
  display: block;
}

.card-link h2 {
  font-family: var(--font-display);
  font-size: 15.5px;
  line-height: 1.35;
  font-weight: 500;
  color: var(--color-text-primary);
  margin: 0;
}
.card-link p {
  font-family: var(--font-ui);
  font-size: 12px;
  line-height: 1.55;
  color: var(--color-text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}
.card-link__go {
  font-family: var(--font-ui);
  font-size: 11.5px;
  font-weight: 500;
  color: var(--color-text-muted);
  display: inline-flex; align-items: center; gap: var(--space-1);
  margin-top: 4px;
  transition: color var(--duration-fast), gap var(--duration-fast);
}
.card-link:hover .card-link__go {
  color: var(--color-accent);
  gap: var(--space-2);
}

.hidden { display: none !important; }

.no-results {
  margin: var(--space-6) 0 0;
  padding: var(--space-8);
  font-family: var(--font-ui);
  color: var(--color-text-secondary);
  text-align: center;
  background: var(--color-bg-raised);
  border: 1px dashed var(--color-border-default);
  border-radius: var(--radius-md);
}
.no-results[hidden] { display: none; }
.hero__actions .no-results { flex-basis: 100%; margin: var(--space-2) 0 0; }

/* ============ Tool Pages ============ */
main { padding-block: var(--space-10) var(--space-24); }
h1 {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 3.5vw, 2.5rem);
  font-weight: 400;
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
  text-wrap: balance;
}
.sub {
  font-family: var(--font-ui);
  font-size: 14.5px; line-height: 1.55;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6); max-width: 62ch;
}

.card {
  padding: var(--space-6) var(--space-8);
  background: var(--color-bg-overlay);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}
[data-theme="dark"] .card {
  background: var(--color-bg-overlay);
}
@media (max-width: 560px) {
  .card { padding: var(--space-5); border-radius: var(--radius-md); }
}
@media (min-width: 560px) {
  .card .btn:not(.btn-small) { width: auto; }
  .card .btn-primary:not(.btn-small) { min-width: 140px; padding-inline: var(--space-8); }
  .card .btn-primary.btn-small { width: auto; min-width: 0; padding-inline: var(--space-4); }
  .card .btn:not(.btn-small) + .btn:not(.btn-small) { margin-left: var(--space-2); }
}

/* Forms & Inputs */
label {
  font-family: var(--font-ui);
  font-size: 11px; font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
  display: block; margin-bottom: var(--space-2);
}
input, select, textarea {
  width: 100%; padding: 9px var(--space-3);
  font-family: var(--font-ui); font-size: 13.5px;
  background: var(--color-bg-base); color: var(--color-text-primary);
  border: 1px solid var(--color-border-default); border-radius: var(--radius-sm);
  transition: border-color var(--duration-fast), box-shadow var(--duration-fast), background-color var(--duration-fast);
}
@media (min-width: 700px) {
  .card input:not([type="checkbox"]):not([type="radio"]):not([type="range"]):not([type="file"]),
  .card select,
  .card textarea {
    max-width: 480px;
  }
  .card .row input, .card .row select { max-width: none; }
}
input:not([type="checkbox"]):not([type="radio"]):not([type="range"]):not([type="file"]),
select {
  min-height: 40px;
  appearance: none;
  -webkit-appearance: none;
}
select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%235E5D59' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 14px;
  padding-right: 36px;
  cursor: pointer;
}
[data-theme="dark"] select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%239E9C94' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
}
select:disabled { opacity: 0.6; cursor: not-allowed; }
input:focus, select:focus, textarea:focus {
  border-color: var(--color-accent) !important;
  background: var(--color-bg-overlay);
  box-shadow: 0 0 0 3px var(--color-accent-soft) !important;
}
input::placeholder { color: var(--color-text-muted); }
textarea { min-height: 110px; resize: vertical; font-family: var(--font-mono); font-size: 13px; line-height: 1.5; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); margin-bottom: var(--space-4); }

/* Segmented Controls / Mode Toggles */
.mode, .unit-toggle {
  display: flex;
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-sm);
  padding: 2px;
  gap: 2px;
  margin-bottom: var(--space-3);
}
.mode {
  width: 100%;
}
.unit-toggle {
  display: inline-flex;
  width: auto;
}
.mode button, .unit-toggle button {
  flex: 1 1 0;
  min-height: 36px;
  padding: 6px 8px;
  white-space: nowrap;
  font-family: var(--font-ui);
  font-size: clamp(11px, 2.7vw, 12.5px);
  font-weight: 500;
  text-align: center;
  border: none;
  background: transparent; color: var(--color-text-secondary);
  border-radius: var(--radius-sm); cursor: pointer;
  transition: all var(--duration-fast);
}
.mode button.active, .unit-toggle button.active {
  background: var(--color-bg-overlay);
  color: var(--color-accent);
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}
[data-theme="dark"] .mode button.active, [data-theme="dark"] .unit-toggle button.active {
  box-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

/* Preset Chips & Examples */
.presets, .examples { display: flex; flex-wrap: wrap; gap: var(--space-2); margin: var(--space-4) 0; }
.presets button, .examples button {
  padding: 5px 12px;
  font-family: var(--font-ui);
  font-size: 12px; font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-bg-base);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-full); cursor: pointer;
  transition: all var(--duration-fast);
}
.presets button:hover, .examples button:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: var(--color-bg-raised);
}
.examples button { font-family: var(--font-mono); font-size: 0.78rem; }

/* Tip Callout Box (Anthropic Editorial Callout) */
.tip {
  margin-top: var(--space-4);
  font-family: var(--font-ui); font-size: 13px;
  color: var(--color-text-secondary);
  background: var(--color-bg-raised);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: var(--space-3) var(--space-4);
  line-height: 1.5;
}
.tip svg { vertical-align: -2px; margin-right: var(--space-2); color: var(--color-accent); }

/* ============ Results Area (Anthropic Inset Surface) ============ */
.result {
  margin-top: var(--space-5);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border-default);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-5) var(--space-6);
  display: none;
}
[data-theme="dark"] .result {
  background: var(--color-bg-raised);
}
@keyframes resultPop {
  0%   { opacity: 0; transform: translateY(6px); }
  100% { opacity: 1; transform: translateY(0); }
}
.result.show {
  display: block;
  animation: resultPop 0.25s cubic-bezier(0.16, 1, 0.3, 1) both;
}
@media (prefers-reduced-motion: reduce) {
  .result.show { animation: none; }
}
.big {
  font-family: var(--font-display);
  font-size: 2rem; font-weight: 500;
  color: var(--color-text-primary);
  letter-spacing: -0.015em;
  font-variant-numeric: tabular-nums;
}
.note { margin-top: var(--space-2); font-size: 13px; color: var(--color-text-secondary); font-family: var(--font-ui); }

/* Tables */
table { width: 100%; border-collapse: collapse; font-size: 13px; margin-top: 12px; }
th, td { border-bottom: 1px solid var(--color-border-default); padding: var(--space-2) 10px; text-align: left; }
th {
  font-family: var(--font-ui);
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--color-text-muted); font-weight: 600;
}
td.inp { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-error); }
td.orig { color: var(--color-error); font-weight: var(--weight-medium); }
td.new { color: var(--color-success); font-weight: var(--weight-semibold); }
tr:hover td { background: rgba(20, 20, 19, 0.02); }
[data-theme="dark"] tr:hover td { background: rgba(255, 255, 255, 0.02); }

@media (max-width: 700px) {
  table { display: block; overflow-x: auto; white-space: nowrap; }
  th, td { white-space: nowrap; }
}

/* ============ Article & Reading ============ */
h2 {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.4vw, 1.75rem);
  font-weight: 400;
  margin: var(--space-10) 0 var(--space-3);
  letter-spacing: -0.01em;
}
h3 {
  font-family: var(--font-display);
  font-size: 1.15rem; font-weight: 500;
  margin: var(--space-6) 0 var(--space-2);
}
article p, article li {
  font-family: var(--font-body);
  color: var(--color-text-secondary);
  font-size: 15px;
  line-height: var(--leading-loose);
  margin-bottom: var(--space-3);
}
article ul { padding-left: var(--space-5); margin-bottom: var(--space-4); }
code {
  font-family: var(--font-mono); font-size: 0.86em;
  background: var(--color-bg-raised); color: var(--color-accent-hover);
  padding: 2px 5px; border-radius: var(--radius-sm);
  border: 1px solid var(--color-border-default);
}

/* Related Tools */
.related { margin-top: var(--space-10); padding-top: var(--space-5); border-top: 1px solid var(--color-border-default); }
.related a {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 12px; font-weight: 500;
  background: var(--color-bg-overlay); border: 1px solid var(--color-border-default);
  border-radius: var(--radius-full); padding: 5px 14px;
  margin: 0 var(--space-2) var(--space-2) 0;
  color: var(--color-text-secondary);
  transition: all var(--duration-fast);
}
.related a:hover { border-color: var(--color-accent); color: var(--color-accent); background: var(--color-bg-raised); }

/* ============ Footer ============ */
footer {
  background: var(--color-bg-base);
  border-top: 1px solid var(--color-border-default);
  color: var(--color-text-muted);
  padding: var(--space-8) 0;
  margin-top: var(--space-16);
}
footer a { color: var(--color-text-secondary); transition: color var(--duration-fast); }
footer a:hover { color: var(--color-accent); }
.footer__inner {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--space-4);
  font-size: 12px;
}
@media (max-width: 480px) {
  .footer__inner { justify-content: center; text-align: center; }
}

/* ============ Responsive ============ */
@media (max-width: 900px) {
  .grid, .tools-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
}
@media (max-width: 640px) {
  /* High-Efficiency 2-Column Tool Grid on Mobile */
  .grid, .tools-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
    gap: 10px !important;
  }
  .card-link {
    padding: 12px 10px !important;
    border-radius: 14px !important;
    gap: 4px !important;
  }
  .card-link__icon {
    width: 28px !important; height: 28px !important;
    margin-bottom: 2px !important;
  }
  .card-link__icon svg { width: 15px !important; height: 15px !important; }
  .card-link h2 {
    font-size: 13.5px !important;
    font-weight: 600 !important;
    line-height: 1.35 !important;
    margin: 0 !important;
  }
  .card-link p {
    font-size: 11px !important;
    line-height: 1.45 !important;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    color: var(--color-text-secondary);
    margin: 2px 0 6px 0 !important;
  }
  .card-link__go {
    font-size: 10.5px !important;
    margin-top: auto;
  }

  /* Compact Horizontal Swipe for Featured Cards */
  .featured-section {
    padding-top: var(--space-6);
  }
  .featured-head {
    margin-bottom: var(--space-3);
  }
  .featured-grid {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    gap: 12px;
    padding-bottom: 8px;
    margin-inline: -16px;
    padding-inline: 16px;
    scrollbar-width: none;
  }
  .featured-grid::-webkit-scrollbar { display: none; }
  .featured-card {
    flex: 0 0 85%;
    min-width: 250px;
    max-width: 320px;
    scroll-snap-align: start;
    padding: 16px;
  }
  .featured-card__top { margin-bottom: 6px; }
  .featured-card__title { font-size: 15px; margin-bottom: 4px; }
  .featured-card__desc {
    font-size: 12px;
    line-height: 1.5;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
}
@media (max-width: 560px) {
  .row, .methods { grid-template-columns: 1fr; }
  .nav { min-height: 56px; }
  .menu a:not(.lang-switch) { display: none !important; }
  .menu a.lang-switch { display: inline-flex !important; }
  main { padding-block: var(--space-4) var(--space-12) !important; }
  .wrap { padding-inline: var(--space-4); }
  .breadcrumbs { margin-bottom: var(--space-2); }
  .tool-title-row { margin-bottom: var(--space-2); }
  .card { padding: 16px 14px !important; border-radius: 14px !important; }
  .presets, .examples { gap: 6px; margin: var(--space-3) 0; }
  .presets button, .examples button { padding: 4px 10px; font-size: 11.5px; }
  h1 { font-size: 1.55rem; }
  .hero { padding-block: var(--space-6); }
  .hero__title { font-size: 2rem; }
}

/* ============ Motion Safety ============ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* Language Switch */
.lang-switch {
  display: inline-flex; align-items: center; justify-content: center;
  white-space: nowrap; flex-shrink: 0;
  height: 36px; min-width: 44px; padding: 0 var(--space-3);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-sm);
  background: var(--color-bg-overlay);
  color: var(--color-text-secondary);
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--duration-fast);
}
.lang-switch:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  font-family: var(--font-ui);
  font-size: 12px;
  color: var(--color-text-muted);
}
.breadcrumbs a {
  color: var(--color-text-secondary);
  transition: color var(--duration-fast);
}
.breadcrumbs a:hover {
  color: var(--color-accent);
}
.breadcrumbs .sep {
  opacity: 0.4;
}
.breadcrumbs span:last-child {
  color: var(--color-text-primary);
  font-weight: 500;
}

/* Search Clear Button & Empty State */
.search-clear-btn {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: none;
  background: var(--color-border-default);
  color: var(--color-text-muted);
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 12px;
  line-height: 1;
  transition: all var(--duration-fast);
}
.search-clear-btn:hover {
  background: var(--color-border-strong);
  color: var(--color-text-primary);
}
.search-clear-btn.visible {
  display: inline-flex;
}
.empty-state-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin-top: 6px;
}

/* Quick Search Button in Header */
.nav-search-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  height: 36px;
  padding: 0 var(--space-3);
  background: var(--color-bg-overlay);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast) ease;
}
.nav-search-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-text-primary);
}
.nav-search-btn .shortcut-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 5px;
  font-size: 10px;
  font-family: var(--font-mono);
  background: var(--color-bg-raised);
  border: 1px solid var(--color-border-default);
  border-radius: 3px;
  color: var(--color-text-muted);
}
@media (max-width: 560px) {
  .nav-search-btn { padding: 0 var(--space-2); }
  .nav-search-btn .search-text, .nav-search-btn .shortcut-badge { display: none; }
}

/* Tool Title Row & Favorite Button */
.tool-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}
.tool-title-row h1 { margin-bottom: 0; min-width: 0; max-width: 100%; overflow-wrap: anywhere; }
.fav-tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: var(--color-bg-overlay);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  font-size: 12px;
  font-family: var(--font-ui);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast) ease;
}
.fav-tool-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}
.fav-tool-btn.favorited {
  border-color: var(--color-accent);
  color: var(--color-accent);
}
.fav-tool-btn.favorited svg {
  fill: var(--color-accent);
  stroke: var(--color-accent);
}

/* Result Actions Bar */
.result-actions-bar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-2);
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--color-border-default);
}
.action-bar-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  font-size: 11.5px;
  font-family: var(--font-ui);
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-bg-overlay);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--duration-fast) ease;
}
.action-bar-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}
.action-bar-btn svg { width: 13px; height: 13px; }

/* Toast */
#jutool-toast-container {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%); z-index: 10000;
  display: flex; flex-direction: column; align-items: center; gap: 8px; pointer-events: none;
}
.jutool-toast {
  display: inline-flex; align-items: center; gap: 8px; padding: 9px 16px;
  background: var(--color-bg-inverted); color: var(--color-text-inverted);
  font-family: var(--font-ui); font-size: 12px; font-weight: 500;
  border-radius: var(--radius-full); box-shadow: 0 4px 16px rgba(0, 0, 0, 0.16);
  opacity: 0; transform: translateY(8px); transition: all 200ms ease; pointer-events: auto;
}
.jutool-toast.toast-show { opacity: 1; transform: translateY(0); }
.jutool-toast svg { width: 14px; height: 14px; color: var(--color-accent); }

/* Quick Search Modal */
.jutool-modal-backdrop {
  position: fixed; inset: 0; background: rgba(20, 20, 19, 0.45);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); z-index: 9999;
  display: flex; align-items: flex-start; justify-content: center;
  padding: clamp(16px, 8vh, 80px) 16px 24px; opacity: 0; visibility: hidden;
  transition: opacity 160ms ease, visibility 160ms ease;
}
.jutool-modal-backdrop.open { opacity: 1; visibility: visible; }
.jutool-modal {
  width: 100%; max-width: 580px; max-height: 80vh;
  background: var(--color-bg-overlay); border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg); box-shadow: 0 16px 40px rgba(0, 0, 0, 0.18);
  display: flex; flex-direction: column; overflow: hidden;
}
.modal-header {
  display: flex; align-items: center; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--color-border-default);
}
.modal-header svg.search-icon { width: 18px; height: 18px; color: var(--color-text-muted); }
.modal-search-input {
  flex: 1; border: none; background: transparent; padding: 0;
  font-family: var(--font-ui); font-size: 14px; color: var(--color-text-primary); outline: none;
}
.modal-close-btn { background: transparent; border: none; color: var(--color-text-muted); font-size: 18px; cursor: pointer; padding: 4px; }
.modal-body { flex: 1; overflow-y: auto; padding: 10px 12px; }
.modal-section-title {
  font-size: 11px; font-family: var(--font-mono); font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--color-text-muted); padding: 6px 10px 4px;
}
.modal-item-list { display: flex; flex-direction: column; gap: 3px; margin-bottom: 8px; }
.modal-item {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 8px 10px; border-radius: var(--radius-sm); text-decoration: none; color: var(--color-text-primary);
  background: transparent; transition: background var(--duration-fast); cursor: pointer;
}
.modal-item:hover, .modal-item.active { background: var(--color-bg-raised); }
.modal-item-main { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.modal-item-title { font-size: 13px; font-weight: 500; color: var(--color-text-primary); }
.modal-item-desc { font-size: 11.5px; color: var(--color-text-secondary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.modal-item-badge {
  font-size: 10px; font-family: var(--font-mono); padding: 2px 6px; border-radius: 4px;
  background: var(--color-bg-base); border: 1px solid var(--color-border-default); color: var(--color-text-muted); flex-shrink: 0;
}
.modal-footer {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px; border-top: 1px solid var(--color-border-default); background: var(--color-bg-raised);
  font-size: 11px; color: var(--color-text-muted);
}
.modal-footer kbd {
  font-family: var(--font-mono); font-size: 10px; padding: 2px 5px; border-radius: 3px;
  background: var(--color-bg-overlay); border: 1px solid var(--color-border-default); margin: 0 2px;
}

/* Quick Access Box on Homepage */
.quick-access-box {
  background: var(--color-bg-raised); border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md); padding: 14px 18px; margin-bottom: 20px;
}
.quick-access-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.quick-access-title {
  font-size: 11px; font-family: var(--font-mono); font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.05em; color: var(--color-accent); display: flex; align-items: center; gap: 6px;
}
.quick-access-grid { display: flex; flex-wrap: wrap; gap: 6px; }
.quick-chip {
  display: inline-flex; align-items: center; gap: 5px; padding: 5px 10px;
  background: var(--color-bg-overlay); border: 1px solid var(--color-border-default);
  border-radius: var(--radius-full); color: var(--color-text-primary); font-size: 11.5px;
  font-weight: 500; text-decoration: none; transition: all var(--duration-fast);
}
.quick-chip:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* Back to Top Button */
.back-to-top-btn {
  position: fixed; bottom: 24px; right: 24px; width: 38px; height: 38px;
  border-radius: 50%; background: var(--color-bg-overlay);
  border: 1px solid var(--color-border-default); box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  color: var(--color-text-secondary); display: flex; align-items: center; justify-content: center;
  cursor: pointer; opacity: 0; visibility: hidden; transform: translateY(6px);
  transition: all 180ms ease; z-index: 90;
}
.back-to-top-btn.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top-btn:hover { border-color: var(--color-accent); color: var(--color-accent); }


/* ============ Anthropic Featured Section (Editor's Picks) ============ */
.featured-section {
  max-width: var(--max-width-layout);
  margin: 0 auto;
  padding: clamp(var(--space-10), 6vw, var(--space-16)) clamp(var(--space-6), 5vw, var(--space-16)) 0;
}
.featured-head {
  margin-bottom: var(--space-6);
}
.featured-kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  font-weight: 500;
  display: block;
  margin-bottom: 6px;
}
.featured-heading {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 2.5vw, 1.85rem);
  font-weight: 400;
  color: var(--color-text-primary);
  letter-spacing: -0.015em;
  margin: 0;
}
.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-4);
}
.featured-card {
  background: var(--color-bg-overlay);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-card);
  transition: border-color var(--duration-fast) ease,
              box-shadow var(--duration-fast) ease,
              transform var(--duration-fast) ease;
}
.featured-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-elevated);
  transform: translateY(-2px);
}
.featured-card__top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 12px;
}
.featured-card__tag {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  font-weight: 600;
}
.featured-card__metric {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-muted);
}
.featured-card__title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 500;
  color: var(--color-text-primary);
  line-height: 1.35;
  margin: 0 0 8px;
}
.featured-card__desc {
  font-family: var(--font-ui);
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--color-text-secondary);
  margin: 0 0 16px;
}
.featured-card__action {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--duration-fast), transform var(--duration-fast);
}
.featured-card:hover .featured-card__action {
  color: var(--color-accent);
  transform: translateX(3px);
}

/* ============ Anthropic Architecture Manifest Band ============ */
.manifest-band {
  background: var(--color-bg-raised);
  border-top: 1px solid var(--color-border-default);
  border-bottom: 1px solid var(--color-border-default);
  padding: clamp(var(--space-12), 8vw, var(--space-20)) 0;
  margin-top: var(--space-16);
}
.manifest-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 var(--space-5);
}
.manifest-kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  font-weight: 500;
  display: block;
  margin-bottom: 8px;
}
.manifest-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 400;
  color: var(--color-text-primary);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}
.manifest-body {
  font-family: var(--font-ui);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin: 0 0 28px;
}
.manifest-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-default);
}
.manifest-stat-item .stat-val {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 500;
  color: var(--color-text-primary);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}
.manifest-stat-item .stat-lbl {
  font-family: var(--font-ui);
  font-size: 12px;
  color: var(--color-text-muted);
  margin-top: 4px;
}