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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--ct-font-ui);
  font-size: var(--ct-text-md);
  line-height: var(--ct-leading-ui);
  color: var(--ct-text);
  background: var(--ct-bg);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--ct-accent);
  text-underline-offset: 0.15em;
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: var(--ct-focus-outline);
  outline-offset: var(--ct-focus-offset);
}

.skip-link {
  position: absolute;
  left: var(--ct-space-4);
  top: var(--ct-space-4);
  padding: var(--ct-space-2) var(--ct-space-4);
  background: var(--ct-surface);
  border-radius: var(--ct-radius-sm);
  transform: translateY(-200%);
  z-index: 100;
}

.skip-link:focus {
  transform: translateY(0);
}

.shell {
  max-width: var(--ct-max-content);
  margin: 0 auto;
  padding: 0 var(--ct-space-6);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--ct-space-3);
  padding: var(--ct-space-6) 0;
  flex-wrap: nowrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--ct-space-3);
  text-decoration: none;
  color: var(--ct-text);
  font-weight: 600;
  font-size: var(--ct-text-lg);
  min-width: 0;
  flex: 1 1 auto;
}

.brand__mark {
  width: 40px;
  height: 40px;
  border-radius: var(--ct-radius-md);
  box-shadow: var(--ct-elevation-1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--ct-space-2);
  flex-wrap: nowrap;
  flex-shrink: 0;
}

.header-actions--compact {
  display: none;
}

.header-actions--wide {
  display: flex;
}

.header-subnav {
  display: none;
  align-items: center;
  gap: var(--ct-space-2);
  padding-bottom: var(--ct-space-4);
  margin-top: calc(-1 * var(--ct-space-2));
}

@media (max-width: 640px) {
  .header-actions--wide {
    display: none;
  }

  .header-actions--compact {
    display: flex;
  }

  .header-subnav {
    display: flex;
  }

  .shell {
    padding: 0 var(--ct-space-4);
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--ct-space-2);
  padding: var(--ct-space-2) var(--ct-space-5);
  border-radius: var(--ct-radius-sm);
  border: 1px solid transparent;
  font-family: inherit;
  font-size: var(--ct-text-sm);
  font-weight: 500;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  background: transparent;
  color: var(--ct-text);
}

.btn--ghost {
  border-color: var(--ct-border);
}

.btn--ghost:hover {
  background: var(--ct-hover-bg);
}

.btn--primary {
  background: var(--ct-accent);
  color: var(--ct-accent-contrast);
}

.btn--primary:hover {
  filter: brightness(1.05);
}

.btn--small {
  padding: var(--ct-space-1) var(--ct-space-3);
  font-size: var(--ct-text-xs);
}

.btn--icon {
  padding: var(--ct-space-2);
  min-width: 2.25rem;
  min-height: 2.25rem;
}

.theme-toggle__icon--sun {
  display: none;
}

.theme-toggle.is-dark .theme-toggle__icon--moon {
  display: none;
}

.theme-toggle.is-dark .theme-toggle__icon--sun {
  display: block;
}

.hero {
  display: grid;
  gap: var(--ct-space-10);
  padding: var(--ct-space-8) 0 var(--ct-space-16);
}

@media (min-width: 900px) {
  .hero {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--ct-space-12);
  }
}

.hero__eyebrow {
  margin: 0 0 var(--ct-space-3);
  font-size: var(--ct-text-sm);
  font-weight: 500;
  color: var(--ct-accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero__title {
  margin: 0 0 var(--ct-space-4);
  font-family: var(--ct-font-manuscript);
  font-size: clamp(var(--ct-text-2xl), 4vw, var(--ct-text-3xl));
  font-weight: 700;
  line-height: var(--ct-leading-tight);
}

.hero__lead {
  margin: 0 0 var(--ct-space-6);
  font-size: var(--ct-text-lg);
  color: var(--ct-text-muted);
  max-width: 42ch;
}

@media (max-width: 640px) {
  .hero__lead {
    font-size: var(--ct-text-md);
  }
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ct-space-3);
  margin-bottom: var(--ct-space-6);
}

.hero__note {
  margin: 0;
  padding: var(--ct-space-4);
  font-size: var(--ct-text-sm);
  color: var(--ct-text);
  background: var(--ct-warning-bg);
  border-radius: var(--ct-radius-md);
  border: 1px solid var(--ct-border);
  max-width: 48ch;
}

.hero__note strong {
  color: var(--ct-warning);
}

.hero__note a {
  color: var(--ct-accent);
  font-weight: 500;
}

.hero-preview {
  background: var(--ct-surface);
  border: 1px solid var(--ct-border);
  border-radius: var(--ct-radius-lg);
  box-shadow: var(--ct-elevation-2);
  overflow: hidden;
}

.hero-preview__chrome {
  padding: var(--ct-space-3) var(--ct-space-4);
  border-bottom: 1px solid var(--ct-border);
  font-size: var(--ct-text-xs);
  color: var(--ct-text-muted);
}

.hero-preview__page {
  margin: var(--ct-space-6);
  padding: var(--ct-space-8);
  background: var(--ct-paper);
  border-radius: var(--ct-radius-md);
  box-shadow: var(--ct-elevation-1);
  font-family: var(--ct-font-manuscript);
  font-size: 1.05rem;
  line-height: var(--ct-leading-body);
}

.hero-preview__chapter {
  margin: 0 0 var(--ct-space-4);
  text-align: center;
  font-size: var(--ct-text-sm);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ct-text-muted);
}

.hero-preview__h1 {
  margin: 0 0 var(--ct-space-6);
  text-align: center;
  font-size: var(--ct-text-xl);
  font-weight: 400;
}

.hero-preview__p {
  margin: 0 0 var(--ct-space-4);
}

.suggest-insert {
  background: color-mix(in srgb, var(--ct-collab-3) 14%, transparent);
  text-decoration: underline 2px var(--ct-collab-3);
}

.suggest-delete {
  color: var(--ct-text-muted);
  text-decoration: line-through var(--ct-collab-2);
  background: color-mix(in srgb, var(--ct-text-muted) 12%, transparent);
}

.features {
  padding: var(--ct-space-16) 0;
  border-top: 1px solid var(--ct-border);
}

.section-title {
  margin: 0 0 var(--ct-space-2);
  font-family: var(--ct-font-manuscript);
  font-size: var(--ct-text-2xl);
  font-weight: 700;
}

.section-lead {
  margin: 0 0 var(--ct-space-10);
  max-width: 52ch;
  color: var(--ct-text-muted);
}

.feature-grid {
  display: grid;
  gap: var(--ct-space-6);
  list-style: none;
  margin: 0;
  padding: 0;
}

@media (min-width: 640px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.feature-card {
  padding: var(--ct-space-6);
  background: var(--ct-surface);
  border: 1px solid var(--ct-border);
  border-radius: var(--ct-radius-md);
  box-shadow: var(--ct-elevation-1);
}

.feature-card h3 {
  margin: 0 0 var(--ct-space-3);
  font-size: var(--ct-text-lg);
  font-weight: 600;
}

.feature-card p {
  margin: 0;
  color: var(--ct-text-muted);
  font-size: var(--ct-text-sm);
}

.site-footer {
  padding: var(--ct-space-10) 0 var(--ct-space-12);
  border-top: 1px solid var(--ct-border);
  font-size: 0.875rem;
  color: var(--ct-text-muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ct-space-4) var(--ct-space-6);
  margin: 0 0 var(--ct-space-4);
  padding: 0;
  list-style: none;
}

.footer-links a {
  color: var(--ct-text-muted);
  text-decoration: none;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--ct-accent);
  text-decoration: underline;
}

.footer-links a:focus-visible {
  outline: var(--ct-focus-outline);
  outline-offset: var(--ct-focus-offset);
  border-radius: var(--ct-radius-sm);
}

.footer-copy {
  margin: 0;
}

.footer-maker {
  margin: 0 0 var(--ct-space-2);
}

.footer-maker a {
  color: var(--ct-text-muted);
  text-decoration: none;
}

.footer-maker a:hover,
.footer-maker a:focus-visible {
  color: var(--ct-accent);
  text-decoration: underline;
}

.footer-maker a:focus-visible {
  outline: var(--ct-focus-outline);
  outline-offset: var(--ct-focus-offset);
  border-radius: var(--ct-radius-sm);
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  clip-path: inset(50%) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.feedback-noscript {
  display: block;
  margin: var(--ct-space-2) 0 0;
  color: var(--ct-text-muted);
  font-size: var(--ct-text-sm);
}

.feedback-form {
  display: flex;
  flex-direction: column;
  gap: var(--ct-space-5);
  position: relative;
  width: 100%;
  min-width: 0;
}

.feedback-form[data-state='sending'] .feedback-input,
.feedback-form[data-state='sending'] .feedback-input--area {
  opacity: 0.85;
}

.feedback-field {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--ct-space-2);
  width: 100%;
  min-width: 0;
}

.feedback-label {
  font-weight: 500;
  font-size: var(--ct-text-sm);
}

.feedback-hint {
  margin: 0;
  font-weight: 400;
  font-size: var(--ct-text-sm);
  color: var(--ct-text-muted);
}

.feedback-input {
  display: block;
  width: 100%;
  max-width: 100%;
  padding: var(--ct-space-3) var(--ct-space-4);
  border: 1px solid var(--ct-border);
  border-radius: var(--ct-radius-sm);
  background: var(--ct-surface);
  color: var(--ct-text);
  font-family: inherit;
  font-size: var(--ct-text-md);
  line-height: var(--ct-leading-ui);
}

.feedback-input--area {
  resize: vertical;
  min-height: 8rem;
}

.feedback-input:focus-visible {
  outline: var(--ct-focus-outline);
  outline-offset: var(--ct-focus-offset);
}

.feedback-input[aria-invalid='true'] {
  border-color: var(--ct-danger);
}

.feedback-error {
  margin: 0;
  min-height: 1.25em;
  font-size: var(--ct-text-sm);
  color: var(--ct-danger);
}

.feedback-counter {
  margin: 0;
  font-size: var(--ct-text-sm);
  color: var(--ct-text-muted);
  text-align: right;
}

.feedback-counter[hidden] {
  display: none;
}

.feedback-alert {
  margin: 0;
  padding: var(--ct-space-3) var(--ct-space-4);
  border: 1px solid var(--ct-danger);
  border-radius: var(--ct-radius-sm);
  background: var(--ct-danger-bg);
  color: var(--ct-text);
  font-size: var(--ct-text-sm);
  line-height: var(--ct-leading-ui);
}

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

.feedback-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ct-space-3);
  justify-content: flex-end;
  position: sticky;
  bottom: 0;
  margin-top: var(--ct-space-2);
  padding-top: var(--ct-space-3);
  background: var(--ct-surface);
}

.footer-link-btn {
  padding: 0;
  border: none;
  background: none;
  color: var(--ct-text-muted);
  font: inherit;
  font-size: inherit;
  text-decoration: none;
  cursor: pointer;
}

.footer-link-btn:hover,
.footer-link-btn:focus-visible {
  color: var(--ct-accent);
  text-decoration: underline;
}

.footer-link-btn:focus-visible {
  outline: var(--ct-focus-outline);
  outline-offset: var(--ct-focus-offset);
  border-radius: var(--ct-radius-sm);
}

.feedback-dialog {
  z-index: var(--ct-z-modal);
  margin: auto;
  padding: 0;
  max-width: min(480px, calc(100% - 2 * var(--ct-space-6)));
  width: 100%;
  border: none !important;
  background: transparent !important;
  color: var(--ct-text);
  box-shadow: none;
  opacity: 0;
  transform: scale(0.96);
  transition:
    opacity 0.2s ease,
    transform 0.2s ease,
    overlay 0.2s ease allow-discrete,
    display 0.2s ease allow-discrete;
}

.feedback-dialog[open] {
  display: block;
  opacity: 1;
  transform: scale(1);
}

@starting-style {
  .feedback-dialog[open] {
    opacity: 0;
    transform: scale(0.96);
  }
}

.feedback-dialog::backdrop {
  background: var(--ct-scrim);
  backdrop-filter: blur(4px);
  opacity: 0;
  transition:
    opacity 0.2s ease,
    overlay 0.2s ease allow-discrete,
    display 0.2s ease allow-discrete;
}

.feedback-dialog[open]::backdrop {
  opacity: 1;
}

@starting-style {
  .feedback-dialog[open]::backdrop {
    opacity: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .feedback-dialog,
  .feedback-dialog::backdrop {
    transition: none;
  }
}

.feedback-dialog__card {
  position: relative;
  box-sizing: border-box;
  width: 100%;
  min-width: 0;
  padding: var(--ct-space-6);
  padding-bottom: calc(var(--ct-space-6) + env(safe-area-inset-bottom, 0px));
  background: var(--ct-surface);
  border: 1px solid var(--ct-border);
  border-radius: var(--ct-radius-lg);
  box-shadow: 0 12px 40px color-mix(in srgb, var(--ct-text) 18%, transparent);
  color: var(--ct-text);
  overflow: auto;
}

.feedback-dialog__title {
  margin: 0 0 var(--ct-space-5);
  font-size: var(--ct-text-xl);
  font-weight: 600;
  line-height: var(--ct-leading-tight);
}

.feedback-dialog__close {
  position: absolute;
  top: var(--ct-space-3);
  right: var(--ct-space-3);
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border: none;
  border-radius: var(--ct-radius-sm);
  background: transparent;
  color: var(--ct-text-muted);
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

.feedback-dialog__close svg {
  display: block;
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

.feedback-dialog__close:hover,
.feedback-dialog__close:focus-visible {
  color: var(--ct-text);
  background: var(--ct-hover-bg);
}

.feedback-dialog__close:focus-visible {
  outline: var(--ct-focus-outline);
  outline-offset: var(--ct-focus-offset);
}

.feedback-submit__spinner {
  display: inline-block;
  width: 1rem;
  height: 1rem;
  margin-left: var(--ct-space-2);
  border: 2px solid color-mix(in srgb, currentColor 35%, transparent);
  border-top-color: currentColor;
  border-radius: var(--ct-radius-full);
  vertical-align: -0.15em;
  animation: feedback-spin 0.7s linear infinite;
}

.feedback-submit__spinner[hidden] {
  display: none;
}

@keyframes feedback-spin {
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .feedback-submit__spinner {
    animation: none;
  }
}

.feedback-actions--success {
  width: 100%;
}

.feedback-success {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--ct-space-5);
}

.feedback-dialog [hidden],
.feedback-success[hidden],
[data-feedback-form-panel][hidden],
[data-feedback-success-panel][hidden] {
  display: none !important;
}

.feedback-success__row {
  display: flex;
  align-items: flex-start;
  gap: var(--ct-space-3);
  margin: 0;
  color: var(--ct-text);
  font-size: var(--ct-text-md);
  line-height: var(--ct-leading-ui);
}

.feedback-success__icon {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  margin-top: 0.15em;
  color: var(--ct-success);
}

.btn--text {
  padding: var(--ct-space-2) var(--ct-space-3);
  min-height: 2.75rem;
  border: none;
  background: transparent;
  color: var(--ct-accent);
  font-size: var(--ct-text-sm);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.btn--text:hover,
.btn--text:focus-visible {
  filter: brightness(1.05);
}

.btn--text:focus-visible {
  outline: var(--ct-focus-outline);
  outline-offset: var(--ct-focus-offset);
}

@media (max-width: 640px) {
  .site-footer {
    text-align: center;
  }

  .footer-links {
    justify-content: center;
  }

  .footer-links a {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding: 0 var(--ct-space-1);
  }

  .feedback-dialog {
    margin: 0;
    margin-top: auto;
    max-width: 100%;
    width: 100%;
    max-height: 92vh;
    height: auto;
    padding: 0;
    align-self: flex-end;
  }

  .feedback-dialog[open] {
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    height: 100%;
    max-height: 100%;
  }

  .feedback-dialog__card {
    border-radius: var(--ct-radius-lg) var(--ct-radius-lg) 0 0;
    max-height: 92vh;
    overflow: auto;
  }

  .feedback-field {
    flex-direction: column;
    align-items: stretch;
  }

  .feedback-label {
    display: block;
    width: 100%;
  }

  .feedback-input,
  .feedback-input--area {
    width: 100%;
    max-width: none;
    font-size: 16px;
  }

  .feedback-actions {
    flex-direction: column-reverse;
    align-items: stretch;
  }

  .feedback-actions .btn {
    width: 100%;
    min-height: 44px;
  }
}