:root {
  --bg: #fafaf8;
  --surface: #ffffff;
  --surface-muted: #f3f4f6;
  --surface-accent: #eef2ff;
  --surface-notice: #fef9ec;
  --border: #dfe3ea;
  --border-strong: #c5ccd8;
  --border-notice: #e7c873;
  --ink: #141619;
  --ink-muted: #4b5563;
  --ink-subtle: #64748b;
  --ink-notice: #6f4700;
  --accent: #1e3a8a;
  --accent-hover: #172e6e;
  --accent-ink: #ffffff;
  --success: #166534;
  --success-bg: #ecfdf3;
  --success-border: #86efac;
  --danger: #991b1b;
  --danger-bg: #fef2f2;
  --danger-border: #fca5a5;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(20, 22, 25, 0.05);
  --shadow-md: 0 8px 24px rgba(20, 22, 25, 0.06);
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-serif: Georgia, "Times New Roman", Times, serif;
  --font-unicode: "Apple Symbols", "STIXGeneral", "Cambria Math", "Segoe UI Symbol", "Noto Sans Math", "DejaVu Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--accent-hover);
}

button:focus-visible,
a:focus-visible,
textarea:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 3px solid #2563eb;
  outline-offset: 2px;
}

.container {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 16px;
}

@media (min-width: 640px) {
  .container {
    padding: 0 24px;
  }
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 10px 14px;
  border-radius: 0 0 var(--radius-sm) 0;
  z-index: 100;
}

.skip-link:focus {
  left: 8px;
  top: 8px;
}

/* Header */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 20px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  min-width: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 9px;
  background: var(--accent);
  color: var(--accent-ink);
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-weight: 700;
  font-size: 1rem;
  color: var(--ink);
}

.brand-sub {
  font-size: 0.78rem;
  color: var(--ink-subtle);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 5px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--ink-muted);
  text-decoration: none;
}

@media (min-width: 640px) {
  .site-nav {
    gap: 6px;
  }

  .nav-link {
    padding: 6px 11px;
    font-size: 0.92rem;
  }
}

.nav-link:hover {
  background: var(--surface-muted);
  color: var(--ink);
}

.nav-link[aria-current="page"] {
  background: var(--surface-accent);
  color: var(--accent);
  font-weight: 600;
}

/* Main */
main {
  padding-top: 28px;
  padding-bottom: 48px;
}

.hero {
  margin-bottom: 20px;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--surface-accent);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

h1 {
  margin: 0 0 10px;
  font-size: clamp(1.8rem, 4vw, 2.45rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.hero-lead {
  margin: 0;
  max-width: 72ch;
  font-size: 1.05rem;
  color: var(--ink-muted);
}

/* Prominent Unicode & Accessibility Notice */
.notice-banner {
  margin: 18px 0 22px;
  padding: 14px 16px;
  background: var(--surface-notice);
  border: 1px solid var(--border-notice);
  border-left: 4px solid #b45309;
  border-radius: var(--radius-md);
  color: var(--ink-notice);
  font-size: 0.93rem;
}

.notice-banner p {
  margin: 0;
}

.notice-banner p + p {
  margin-top: 6px;
}

/* Converter Workspace */
.tool-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-md);
}

@media (min-width: 640px) {
  .tool-panel {
    padding: 22px;
  }
}

.input-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  margin-bottom: 8px;
}

.input-label {
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--ink);
}

.counter-group {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.86rem;
  color: var(--ink-muted);
}

.char-counter {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--surface-muted);
  color: var(--ink);
}

.char-counter.is-limit {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid var(--danger-border);
  font-weight: 600;
}

.source-textarea {
  width: 100%;
  min-height: 98px;
  padding: 12px 14px;
  border: 1.5px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: #ffffff;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.5;
  resize: vertical;
}

.source-textarea:hover {
  border-color: #94a3b8;
}

.limit-alert {
  margin-top: 8px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: var(--danger-bg);
  border: 1px solid var(--danger-border);
  color: var(--danger);
  font-size: 0.88rem;
  font-weight: 500;
}

.limit-alert[hidden] {
  display: none;
}

.toolbar-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 12px;
}

.sample-pills {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.toolbar-label {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--ink-subtle);
  margin-right: 2px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 36px;
  padding: 6px 13px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.12s ease, border-color 0.12s ease;
}

.btn:hover:not(:disabled) {
  background: var(--surface-muted);
}

.btn:disabled {
  opacity: 0.52;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.btn-sm {
  min-height: 32px;
  padding: 4px 10px;
  font-size: 0.83rem;
}

.btn.is-copied {
  background: var(--success-bg);
  border-color: var(--success-border);
  color: var(--success);
}

/* Style Switcher & Filter */
.switcher-section {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.switcher-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.switcher-title {
  margin: 0;
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--ink);
}

.filter-tabs,
.style-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tab-btn {
  padding: 5px 10px;
  min-height: 32px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-muted);
  color: var(--ink-muted);
  font-family: var(--font-sans);
  font-size: 0.81rem;
  font-weight: 600;
  cursor: pointer;
}

.tab-btn:hover {
  border-color: var(--border-strong);
  color: var(--ink);
}

.tab-btn.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

/* Spotlight Active Style Card */
.spotlight-card {
  margin-top: 14px;
  padding: 16px;
  border-radius: var(--radius-md);
  background: var(--surface-accent);
  border: 1px solid #c7d2fe;
}

.spotlight-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 12px;
  margin-bottom: 10px;
}

.spotlight-title-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.spotlight-badge {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-ink);
}

.spotlight-name {
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--ink);
}

.spotlight-meta {
  font-size: 0.83rem;
  color: var(--ink-muted);
}

.spotlight-output {
  margin: 0;
  padding: 12px 14px;
  min-height: 54px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid #dbe2fe;
  font-family: var(--font-unicode);
  font-size: 1.25rem;
  line-height: 1.5;
  color: var(--ink);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.spotlight-output.is-empty {
  color: var(--ink-subtle);
  font-family: var(--font-sans);
  font-size: 0.96rem;
  font-style: normal;
}

.spotlight-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 10px;
}

.output-metrics {
  font-size: 0.82rem;
  color: var(--ink-muted);
  font-family: var(--font-mono);
}

/* Manual Copy Fallback Box */
.fallback-panel {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: var(--surface-notice);
  border: 1.5px solid #d97706;
  color: var(--ink);
}

.fallback-panel[hidden] {
  display: none;
}

.fallback-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}

.fallback-title {
  margin: 0;
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--ink-notice);
}

.fallback-help {
  margin: 0 0 10px;
  font-size: 0.88rem;
  color: var(--ink-notice);
}

.fallback-textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #d97706;
  border-radius: var(--radius-sm);
  background: #ffffff;
  color: var(--ink);
  font-family: var(--font-unicode);
  font-size: 1.05rem;
  line-height: 1.5;
}

.fallback-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

/* All Styles Grid */
.styles-section {
  margin-top: 26px;
}

.section-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  margin-bottom: 14px;
}

.section-header h2 {
  margin: 0;
  font-size: 1.32rem;
  color: var(--ink);
}

.section-subtitle {
  margin: 0;
  font-size: 0.9rem;
  color: var(--ink-muted);
}

.styles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 720px) {
  .styles-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.style-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 10px;
  padding: 15px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  min-width: 0;
}

.style-card.is-selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.style-card[hidden] {
  display: none;
}

.style-card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

.style-card-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
}

.style-card-note {
  margin: 2px 0 0;
  font-size: 0.8rem;
  color: var(--ink-subtle);
}

.style-output {
  margin: 0;
  padding: 10px 12px;
  min-height: 48px;
  border-radius: var(--radius-sm);
  background: var(--surface-muted);
  border: 1px solid #e5e7eb;
  font-family: var(--font-unicode);
  font-size: 1.15rem;
  line-height: 1.48;
  color: var(--ink);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.style-output.is-empty {
  color: var(--ink-subtle);
  font-family: var(--font-sans);
  font-size: 0.9rem;
}

.style-card-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.style-count {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--ink-subtle);
}

.style-actions {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Informational & FAQ Sections */
.info-section {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

.info-section h2 {
  margin: 0 0 14px;
  font-size: 1.35rem;
  color: var(--ink);
}

.info-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 720px) {
  .info-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.info-card {
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.info-card h3 {
  margin: 0 0 8px;
  font-size: 1.02rem;
  color: var(--ink);
}

.info-card p {
  margin: 0;
  font-size: 0.93rem;
  color: var(--ink-muted);
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.faq-item h3 {
  margin: 0 0 6px;
  font-size: 1.02rem;
  color: var(--ink);
}

.faq-item p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ink-muted);
}

/* Subpages: About & Privacy & 404 */
.prose-page {
  max-width: 780px;
}

.breadcrumb {
  margin-bottom: 12px;
  font-size: 0.88rem;
  color: var(--ink-subtle);
}

.prose-section {
  margin-top: 24px;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.prose-section h2 {
  margin: 0 0 10px;
  font-size: 1.18rem;
  color: var(--ink);
}

.prose-section p {
  margin: 0 0 10px;
  color: var(--ink-muted);
}

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

.prose-section ul {
  margin: 8px 0 0;
  padding-left: 20px;
  color: var(--ink-muted);
}

.prose-section li + li {
  margin-top: 6px;
}

code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--surface-muted);
  padding: 1px 5px;
  border-radius: 4px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 28px 0 32px;
  font-size: 0.9rem;
  color: var(--ink-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 720px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1.2fr;
  }
}

.footer-heading {
  margin: 0 0 8px;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--ink);
}

.footer-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-list li + li {
  margin-top: 6px;
}

.roadmap-tag {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 6px;
  font-size: 0.72rem;
  font-weight: 600;
  border-radius: 999px;
  background: var(--surface-muted);
  color: var(--ink-subtle);
}

.footer-bottom {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 16px;
  font-size: 0.83rem;
  color: var(--ink-subtle);
}

.footer-bottom p {
  margin: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}