:root {
  --color-primary: #0066cc;
  --color-primary-focus: #0071e3;
  --color-primary-on-dark: #2997ff;
  --color-ink: #1d1d1f;
  --color-body: #1d1d1f;
  --color-body-on-dark: #ffffff;
  --color-body-muted: #cccccc;
  --color-ink-muted-80: #333333;
  --color-ink-muted-48: #7a7a7a;
  --color-divider-soft: #f0f0f0;
  --color-hairline: #e0e0e0;
  --color-canvas: #ffffff;
  --color-canvas-parchment: #f5f5f7;
  --color-surface-pearl: #fafafc;
  --color-surface-tile-1: #272729;
  --color-surface-tile-2: #2a2a2c;
  --color-surface-tile-3: #252527;
  --color-surface-black: #000000;
  --color-surface-chip-translucent: rgba(210, 210, 215, 0.64);
  --color-on-primary: #ffffff;
  --color-on-dark: #ffffff;

  --rounded-none: 0px;
  --rounded-xs: 5px;
  --rounded-sm: 8px;
  --rounded-md: 11px;
  --rounded-lg: 18px;
  --rounded-pill: 9999px;

  --spacing-xxs: 4px;
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 17px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  --spacing-section: 80px;

  --font-display: "SF Pro Display", "SF Pro Text", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-text: "SF Pro Text", "SF Pro Display", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-text);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.47;
  letter-spacing: -0.374px;
  color: var(--color-body);
  background: #ffffff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
}
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }

.app-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(29, 29, 31, 0.8);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  height: 52px;
  display: flex;
  align-items: center;
}
.app-nav-inner {
  display: flex;
  align-items: center;
  width: 100%;
  max-width: 1024px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}
.app-nav-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  flex-shrink: 0;
}
.app-nav-brand-icon {
  width: 18px;
  height: 18px;
  fill: var(--color-on-dark);
  opacity: 0.9;
}
.app-nav-brand-text {
  font-family: var(--font-text);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.0;
  letter-spacing: -0.12px;
  color: var(--color-on-dark);
  opacity: 0.95;
}
.app-nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}
.app-nav-manual {
  margin-left: auto;
  font-family: var(--font-text);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.0;
  letter-spacing: -0.12px;
  color: var(--color-on-dark);
  opacity: 0.8;
  transition: opacity 0.2s;
}
.app-nav-manual:hover { opacity: 1; text-decoration: none; }

.app-wrap {
  padding-top: 52px;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.tile-row {
  display: flex;
  gap: 0;
  max-width: 100%;
  flex: 1;
  min-height: 0;
}
.tile-panel {
  flex: 1;
  padding: 16px 24px 8px;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}
.tile-panel > * {
  max-width: 980px;
  width: 100%;
}
.tile-panel > .tile-heading { flex-shrink: 0; margin-bottom: 8px; }
.tile-panel > .hint { flex-shrink: 0; margin-top: 4px; }

.tile-light {
  background: var(--color-canvas);
  color: var(--color-ink);
}
.tile-parchment {
  background: var(--color-canvas-parchment);
  color: var(--color-ink);
}
.tile-warm {
  background: var(--color-canvas);
  color: var(--color-ink);
}
.tile-warm .text-muted { color: var(--color-ink-muted-48); }

.tile-heading {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: 0;
  text-align: center;
  margin-bottom: 8px;
  flex-shrink: 0;
}
.tile-heading-inline {
  font-size: 15px;
  font-weight: 400;
  color: var(--color-ink-muted-48);
  display: inline;
}
.tile-tagline {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 400;
  line-height: 1.14;
  letter-spacing: 0.196px;
  text-align: center;
  margin-bottom: var(--spacing-xl);
}
.tile-tagline-airy {
  font-family: var(--font-text);
  font-size: 14px;
  font-weight: 300;
  line-height: 1.2;
  text-align: center;
  margin-bottom: var(--spacing-md);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-text);
  font-weight: 400;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.1s ease, opacity 0.15s ease;
  -webkit-tap-highlight-color: transparent;
  white-space: nowrap;
}
.btn:active { transform: scale(0.95); }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.374px;
  border-radius: var(--rounded-pill);
  padding: 11px 22px;
  min-height: 44px;
}
.btn-primary:hover { color: var(--color-on-primary); text-decoration: none; opacity: 0.92; }
.btn-primary:focus-visible { outline: 2px solid var(--color-primary-focus); outline-offset: 2px; }

.btn-primary-large {
  font-size: 18px;
  font-weight: 300;
  line-height: 1.0;
  padding: 14px 28px;
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.374px;
  border-radius: var(--rounded-pill);
  padding: 11px 22px;
  min-height: 44px;
}
.btn-secondary:hover { text-decoration: none; opacity: 0.85; }

.btn-dark {
  background: var(--color-ink);
  color: var(--color-on-dark);
  font-size: 14px;
  line-height: 1.29;
  letter-spacing: -0.224px;
  border-radius: var(--rounded-sm);
  padding: 8px 15px;
  min-height: 36px;
}

.btn-pearl {
  background: var(--color-surface-pearl);
  color: var(--color-ink-muted-80);
  font-size: 14px;
  line-height: 1.43;
  letter-spacing: -0.224px;
  border: 1px solid var(--color-divider-soft);
  border-radius: var(--rounded-md);
  padding: 8px 14px;
}

.btn-icon {
  width: 44px;
  height: 44px;
  background: var(--color-surface-chip-translucent);
  color: var(--color-ink);
  border-radius: var(--rounded-pill);
}
.btn-icon svg { width: 18px; height: 18px; }

.btn-export {
  font-size: 14px;
  line-height: 1.29;
  letter-spacing: -0.224px;
  border-radius: var(--rounded-pill);
  padding: 8px 16px;
  min-height: 36px;
}
.btn-export-primary {
  background: var(--color-primary);
  color: var(--color-on-primary);
}
.btn-export-secondary {
  background: var(--color-canvas);
  color: var(--color-ink-muted-80);
  border: 1px solid var(--color-divider-soft);
}
.btn-export-secondary:hover { color: var(--color-ink); text-decoration: none; }

.dropdown { position: relative; }
.dropdown-toggle {
  font-family: var(--font-text);
  font-size: 12px;
  font-weight: 400;
  line-height: 1.0;
  letter-spacing: -0.12px;
  color: var(--color-on-dark);
  opacity: 0.8;
  padding: var(--spacing-xxs) var(--spacing-xs);
  cursor: pointer;
  background: none;
  border: none;
  transition: opacity 0.2s;
}
.dropdown-toggle:hover { opacity: 1; }
.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-md);
  box-shadow: rgba(0, 0, 0, 0.12) 0 4px 16px;
  min-width: 140px;
  padding: var(--spacing-xxs) 0;
  display: none;
  z-index: 1001;
}
.dropdown.open .dropdown-menu { display: block; }
.dropdown-item {
  display: block;
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 14px;
  color: var(--color-ink);
  cursor: pointer;
}
.dropdown-item:hover { background: #f5f5f7; }

.editor-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  padding: 10px 14px;
  border-bottom: 1px solid var(--color-hairline);
  background: var(--color-surface-pearl);
}
.editor-toolbar-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}
.editor-toolbar-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}
.toolbar-divider {
  color: var(--color-hairline);
  font-size: 13px;
  user-select: none;
}

.dropzone-inline {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border: 1px dashed var(--color-hairline);
  border-radius: var(--rounded-xs);
  cursor: pointer;
  font-size: 13px;
  color: var(--color-ink-muted-48);
  background: var(--color-canvas);
  transition: border-color 0.2s, background 0.2s;
}
.dropzone-inline:hover, .dropzone-inline.dragover {
  border-color: var(--color-primary);
  background: rgba(0, 102, 204, 0.04);
  color: var(--color-primary);
}
.dropzone-inline .btn-pearl {
  font-size: 12px;
  padding: 4px 10px;
  height: auto;
}

.dropzone-loaded-inline {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-bottom: 1px solid var(--color-hairline);
  background: var(--color-canvas);
  font-size: 13px;
  color: var(--color-ink-muted-48);
}
.dropzone-loaded-inline .filename {
  color: var(--color-ink);
  font-weight: 500;
}

.editor-container {
  background: var(--color-canvas);
  border-radius: var(--rounded-lg);
  border: 1px solid var(--color-hairline);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.editor-body {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.editor-body .md-textarea {
  flex: 1;
  border: none;
  border-radius: 0;
  min-height: auto;
  resize: none;
  padding: 16px;
}
.editor-body .md-textarea:focus { border-color: transparent; }

.select-apple {
  font-family: var(--font-text);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.29;
  letter-spacing: -0.224px;
  color: var(--color-ink);
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-pill);
  padding: 8px 16px;
  height: 36px;
  cursor: pointer;
  outline: none;
}
.select-apple:focus { border-color: var(--color-primary); }

.md-textarea {
  width: 100%;
  border: none;
  padding: var(--spacing-md);
  font-family: var(--font-text);
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.374px;
  color: var(--color-ink);
  outline: none;
  background: var(--color-canvas);
}
.md-textarea::placeholder { color: var(--color-ink-muted-48); }
.md-textarea:focus { border-color: transparent; }

.hint {
  font-size: 12px;
  font-weight: 400;
  line-height: 1.43;
  letter-spacing: -0.224px;
  color: var(--color-ink-muted-48);
  margin-top: 4px;
  text-align: center;
  flex-shrink: 0;
}

.preview-container {
  background: var(--color-canvas);
  border-radius: var(--rounded-lg);
  border: 1px solid var(--color-hairline);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.preview-toolbar-bar {
  display: flex;
  align-items: center;
  padding: 6px 10px;
  border-bottom: 1px solid var(--color-hairline);
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  background: var(--color-surface-pearl);
}
.preview-toolbar-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}
.preview-toolbar-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
  margin-left: auto;
}

.preview-body {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding: 8px;
  background: var(--color-canvas);
}

.preview-wrap {
  flex: 1;
  min-height: 0;
  background: var(--color-canvas);
  border-radius: var(--rounded-sm);
  overflow: auto;
  border: none;
}
.preview-article {
  background: var(--color-canvas);
  border-radius: 0;
  padding: 12px;
  margin: 0;
  box-shadow: none;
  font-family: var(--font-text);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.47;
  letter-spacing: -0.374px;
  color: var(--color-ink);
}

.faq-section {
  background: var(--color-canvas);
  padding: var(--spacing-section) var(--spacing-xl);
  border-top: 1px solid var(--color-divider-soft);
}
.faq-inner {
  max-width: 980px;
  margin: 0 auto;
}
.faq-heading {
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 600;
  line-height: 1.47;
  letter-spacing: -0.374px;
  text-align: center;
  margin-bottom: var(--spacing-xxl);
}
.faq-item {
  border-bottom: 1px solid var(--color-divider-soft);
  padding: var(--spacing-lg) 0;
}
.faq-item:last-child { border-bottom: none; }
.faq-q {
  font-family: var(--font-text);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.24;
  letter-spacing: -0.374px;
  margin-bottom: var(--spacing-xs);
}
.faq-a {
  font-family: var(--font-text);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.47;
  letter-spacing: -0.374px;
  color: var(--color-ink-muted-80);
}

.apple-footer {
  background: var(--color-canvas);
  border-top: 1px solid var(--color-divider-soft);
  padding: var(--spacing-xxl) var(--spacing-xl);
}
.apple-footer-inner {
  max-width: 980px;
  margin: 0 auto;
  text-align: center;
}
.apple-footer-text {
  font-family: var(--font-text);
  font-size: 12px;
  font-weight: 400;
  line-height: 1.0;
  letter-spacing: -0.12px;
  color: var(--color-ink-muted-48);
  margin-bottom: var(--spacing-sm);
}
.apple-footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}
.apple-footer-links a {
  font-family: var(--font-text);
  font-size: 17px;
  font-weight: 400;
  line-height: 2.41;
  color: var(--color-ink-muted-80);
}
.apple-footer-links a:hover { color: var(--color-ink); text-decoration: none; }

.export-dropdown { position: relative; }
.export-dropdown .btn.dropdown-toggle {
  background: var(--color-primary);
  color: var(--color-on-primary);
  border: none;
  opacity: 1;
  font-size: 14px;
  line-height: 1.29;
  letter-spacing: -0.224px;
}
.export-dropdown .btn.dropdown-toggle:hover { opacity: 0.92; }
.export-dropdown .dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 6px;
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--rounded-md);
  box-shadow: rgba(0, 0, 0, 0.12) 0 4px 16px;
  min-width: 120px;
  padding: 4px 0;
  display: none;
  z-index: 1001;
}
.export-dropdown.open .dropdown-menu { display: block; }
.export-dropdown .dropdown-item {
  display: block;
  padding: 8px 16px;
  font-size: 14px;
  color: var(--color-ink);
  cursor: pointer;
}
.export-dropdown .dropdown-item:hover { background: #f5f5f7; }

.hidden { display: none !important; }
.btn-toggle-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 14px;
  background: var(--color-canvas);
  color: var(--color-ink-muted-80);
  font-family: var(--font-text);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.0;
  letter-spacing: -0.12px;
  border-radius: var(--rounded-pill);
  border: 1px solid var(--color-hairline);
  cursor: pointer;
  transition: opacity 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.btn-toggle-action:hover { background: #f5f5f7; color: var(--color-ink); }
.btn-toggle-action:active { transform: scale(0.95); }
.btn-toggle-action svg { width: 15px; height: 15px; }
.css-badge {
  display: inline-block;
  font-size: 14px;
  background: #f5f5f7;
  color: var(--color-ink-muted-80);
  border-radius: var(--rounded-md);
  padding: 4px 10px;
}

@media (max-width: 1440px) {
  .tile-panel > * { max-width: 980px; }
}
@media (max-width: 1068px) {
  .tile-panel { padding: var(--spacing-xxl) var(--spacing-lg); }
  .tile-heading { font-size: 24px; }
}
@media (max-width: 833px) {
  .tile-row { flex-direction: column; }
  .tile-panel { padding: var(--spacing-xxl) var(--spacing-md); }
}
@media (max-width: 734px) {
  .tile-panel { padding: var(--spacing-xl) var(--spacing-md); }
}
@media (max-width: 640px) {
  .tile-heading { font-size: 28px; }
  .tile-tagline { font-size: 21px; }
  .tile-tagline-airy { font-size: 14px; }
  .faq-heading { font-size: 28px; }
}
@media (max-width: 419px) {
  .tile-panel { padding: var(--spacing-xl) var(--spacing-sm); }
  .tile-heading { font-size: 28px; }
  .tile-tagline { font-size: 17px; }
  .preview-toolbar-bar { gap: var(--spacing-xxs); }
  .btn-export { padding: 6px 12px; font-size: 12px; }
}