:root {
  color-scheme: light;
  --bg: #f4f5f8;
  --surface: rgba(255, 255, 255, 0.88);
  --surface-solid: #ffffff;
  --surface-muted: #f7f7fa;
  --surface-elevated: #ffffff;
  --text: #11131a;
  --text-muted: #666b78;
  --text-faint: #9297a4;
  --border: #e2e4ea;
  --border-strong: #cfd2db;
  --accent: #5d50f6;
  --accent-strong: #4437dc;
  --accent-soft: #eeecff;
  --danger: #cf334b;
  --danger-soft: #fff0f2;
  --success: #168464;
  --success-soft: #eaf8f3;
  --code-bg: #0c1020;
  --code-text: #dce6ff;
  --shadow-sm: 0 1px 2px rgba(16, 18, 27, 0.05);
  --shadow-md: 0 16px 48px rgba(31, 34, 52, 0.08);
  --shadow-lg: 0 24px 72px rgba(31, 34, 52, 0.14);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --font-sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #090b11;
  --surface: rgba(18, 20, 29, 0.88);
  --surface-solid: #12141d;
  --surface-muted: #171a24;
  --surface-elevated: #1a1d28;
  --text: #f5f6fb;
  --text-muted: #a7adbb;
  --text-faint: #737a8a;
  --border: #292d39;
  --border-strong: #393e4d;
  --accent: #8c82ff;
  --accent-strong: #a79fff;
  --accent-soft: #24203f;
  --danger: #ff6c80;
  --danger-soft: #32171e;
  --success: #59d2ad;
  --success-soft: #123129;
  --code-bg: #070911;
  --code-text: #e5ebff;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 16px 48px rgba(0, 0, 0, 0.28);
  --shadow-lg: 0 24px 72px rgba(0, 0, 0, 0.42);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 12% -10%, color-mix(in srgb, var(--accent) 13%, transparent), transparent 36rem),
    radial-gradient(circle at 88% 4%, color-mix(in srgb, #2cbeff 8%, transparent), transparent 30rem),
    var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.5;
  text-rendering: optimizeLegibility;
}

button,
input,
textarea,
select {
  font: inherit;
}

button,
a,
input,
textarea,
select {
  -webkit-tap-highlight-color: transparent;
}

button,
a {
  touch-action: manipulation;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
pre:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 30%, transparent);
  outline-offset: 2px;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  transform: translateY(-150%);
  border-radius: 10px;
  background: var(--text);
  color: var(--bg);
  padding: 10px 14px;
  text-decoration: none;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 12px clamp(18px, 4vw, 56px);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 72%, transparent);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(18px) saturate(150%);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid color-mix(in srgb, var(--accent) 38%, var(--border));
  border-radius: 13px;
  background: linear-gradient(145deg, var(--accent-soft), var(--surface-solid));
  color: var(--accent-strong);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 800;
  box-shadow: var(--shadow-sm);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 14px;
  letter-spacing: -0.01em;
}

.brand small {
  margin-top: 1px;
  color: var(--text-muted);
  font-size: 12px;
}

.topbar-actions,
.preview-actions,
.dialog-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.privacy-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 11px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 700;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--success) 12%, transparent);
}

.app-shell {
  width: min(1880px, calc(100% - clamp(24px, 5vw, 80px)));
  margin: 0 auto;
  padding: clamp(38px, 6vw, 84px) 0 56px;
}

.hero {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: clamp(28px, 4vw, 46px);
}

.hero > div:first-child {
  max-width: 860px;
}

.eyebrow,
.overline {
  margin: 0 0 8px;
  color: var(--accent-strong);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(38px, 5.5vw, 78px);
  font-weight: 760;
  letter-spacing: -0.055em;
  line-height: 0.98;
}

.hero-copy {
  max-width: 760px;
  margin: 22px 0 0;
  color: var(--text-muted);
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.7;
}

.shortcut-card {
  display: grid;
  flex: 0 0 auto;
  gap: 8px;
  min-width: 235px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  color: var(--text-muted);
  font-size: 12px;
}

.shortcut-card span {
  display: flex;
  align-items: center;
  gap: 5px;
}

kbd {
  min-width: 25px;
  padding: 3px 6px;
  border: 1px solid var(--border-strong);
  border-bottom-width: 2px;
  border-radius: 6px;
  background: var(--surface-muted);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 10px;
  text-align: center;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(220px, 0.72fr) minmax(460px, 1.55fr) minmax(360px, 1.15fr);
  align-items: start;
  gap: 16px;
}

.library-panel,
.builder-panel,
.preview-panel {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(16px);
}

.library-panel {
  overflow: hidden;
}

.builder-panel,
.preview-panel {
  padding: 22px;
}

.preview-panel {
  position: sticky;
  top: 88px;
}

.panel-section {
  padding: 22px;
}

.panel-section + .panel-section {
  border-top: 1px solid var(--border);
}

.panel-header,
.section-heading,
.section-toolbar,
.preview-footer,
.field-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.panel-header {
  margin-bottom: 20px;
}

.panel-header h2,
.section-heading h2,
.confirm-dialog h2 {
  margin: 0;
  font-size: 18px;
  letter-spacing: -0.025em;
}

.template-list {
  display: grid;
  gap: 9px;
}

.template-card {
  display: grid;
  gap: 4px;
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-solid);
  color: var(--text);
  cursor: pointer;
  text-align: left;
  transition: 160ms ease;
}

.template-card:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  box-shadow: var(--shadow-sm);
}

.template-name {
  font-size: 13px;
  font-weight: 750;
}

.template-description {
  color: var(--text-muted);
  font-size: 11px;
  line-height: 1.45;
}

.tag-library {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.tag-chip {
  padding: 7px 9px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--surface-muted);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  cursor: pointer;
  transition: 150ms ease;
}

.tag-chip:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.privacy-note {
  display: flex;
  gap: 11px;
  margin: 0 14px 14px;
  padding: 14px;
  border: 1px solid color-mix(in srgb, var(--success) 24%, var(--border));
  border-radius: 14px;
  background: var(--success-soft);
}

.privacy-icon {
  color: var(--success);
}

.privacy-note strong {
  font-size: 12px;
}

.privacy-note p {
  margin: 3px 0 0;
  color: var(--text-muted);
  font-size: 11px;
  line-height: 1.45;
}

.primary-button,
.ghost-button,
.icon-button,
.text-button {
  border: 0;
  cursor: pointer;
  font-weight: 750;
  transition: 150ms ease;
}

.primary-button,
.ghost-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  min-height: 40px;
  padding: 9px 14px;
  border-radius: 11px;
  text-decoration: none;
}

.primary-button {
  background: var(--accent);
  color: white;
  box-shadow: 0 8px 20px color-mix(in srgb, var(--accent) 24%, transparent);
}

.primary-button:hover {
  transform: translateY(-1px);
  background: var(--accent-strong);
}

.primary-button.danger {
  background: var(--danger);
}

.ghost-button {
  border: 1px solid var(--border);
  background: var(--surface-solid);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}

.ghost-button:hover {
  border-color: var(--border-strong);
  background: var(--surface-muted);
}

.compact {
  min-height: 34px;
  padding: 7px 10px;
  border-radius: 9px;
  font-size: 12px;
}

.document-settings {
  display: grid;
  grid-template-columns: minmax(180px, 1.5fr) minmax(130px, 0.8fr) minmax(110px, 0.65fr) auto;
  align-items: end;
  gap: 12px;
  margin-bottom: 16px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 15px;
  background: var(--surface-muted);
}

.setting-field,
.field {
  display: grid;
  gap: 7px;
}

.setting-field > span,
.field > span:first-child,
.field-heading > span:first-child {
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 750;
}

.setting-field select,
.field input,
.field textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--surface-solid);
  color: var(--text);
}

.setting-field select {
  min-height: 42px;
  padding: 0 11px;
}

.check-setting {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
}

.check-setting input {
  width: 17px;
  height: 17px;
  accent-color: var(--accent);
}

.tag-input-shell {
  display: flex;
  align-items: center;
  gap: 4px;
  min-height: 43px;
  padding: 0 11px;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--surface-solid);
  color: var(--accent-strong);
  font-family: var(--font-mono);
}

.tag-input-shell:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 12%, transparent);
}

.tag-input-shell input {
  min-width: 0;
  padding: 0;
  border: 0;
  outline: 0;
  background: transparent;
  font-family: inherit;
  font-size: 12px;
}

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

.section-card {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface-solid);
  box-shadow: var(--shadow-sm);
  transition: border-color 150ms ease, transform 150ms ease, opacity 150ms ease;
}

.section-card.has-error {
  border-color: color-mix(in srgb, var(--danger) 55%, var(--border));
}

.section-card.is-dragging {
  opacity: 0.45;
}

.section-card.drag-over {
  transform: translateY(4px);
  border-color: var(--accent);
}

.section-toolbar {
  min-height: 49px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-muted);
}

.section-identity,
.section-actions {
  display: flex;
  align-items: center;
  gap: 7px;
}

.drag-handle,
.icon-button {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  padding: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text-muted);
}

.drag-handle {
  border: 0;
  cursor: grab;
  font-size: 14px;
  letter-spacing: -4px;
}

.drag-handle:active {
  cursor: grabbing;
}

.icon-button:hover:not(:disabled),
.drag-handle:hover {
  background: var(--surface-solid);
  color: var(--text);
}

.icon-button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.icon-button.danger:hover {
  background: var(--danger-soft);
  color: var(--danger);
}

.section-number {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 800;
  color: var(--accent-strong);
}

.section-label {
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 700;
}

.field-grid {
  display: grid;
  gap: 14px;
  padding: 15px;
}

.field textarea {
  min-height: 132px;
  padding: 12px 13px;
  resize: none;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
}

.field textarea:focus,
.setting-field select:focus {
  border-color: var(--accent);
  outline: none;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 12%, transparent);
}

.content-count {
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 9px;
}

.field-error {
  min-height: 0;
  color: var(--danger);
  font-size: 10px;
}

.field-error:empty {
  display: none;
}

.empty-state {
  padding: 56px 24px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-md);
  text-align: center;
}

.empty-icon {
  display: inline-grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border-radius: 17px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-family: var(--font-mono);
}

.empty-state h3 {
  margin: 15px 0 5px;
  font-size: 16px;
}

.empty-state p {
  margin: 0 0 16px;
  color: var(--text-muted);
  font-size: 12px;
}

.validation-message {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  padding: 9px 11px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 720;
}

.validation-message.valid {
  background: var(--success-soft);
  color: var(--success);
}

.validation-message.error {
  background: var(--danger-soft);
  color: var(--danger);
}

.output-shell {
  overflow: auto;
  min-height: 440px;
  max-height: calc(100vh - 330px);
  border: 1px solid #1d2334;
  border-radius: 16px;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px) 0 0 / 24px 24px,
    var(--code-bg);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.output-shell.has-error {
  border-color: color-mix(in srgb, var(--danger) 60%, #1d2334);
}

#output {
  min-width: max-content;
  margin: 0;
  padding: 20px;
  color: var(--code-text);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.65;
  white-space: pre;
  tab-size: 2;
}

#output.is-placeholder {
  color: #737d99;
}

.output-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 12px 0 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-muted);
}

.output-stats div {
  padding: 10px 12px;
}

.output-stats div + div {
  border-left: 1px solid var(--border);
}

.output-stats dt {
  color: var(--text-faint);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.output-stats dd {
  margin: 2px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.preview-footer {
  align-items: end;
  margin-top: 13px;
}

.preview-footer p {
  max-width: 210px;
  margin: 0;
  color: var(--text-faint);
  font-size: 10px;
}

.text-button {
  padding: 0;
  background: transparent;
  color: var(--text-muted);
  font-size: 11px;
}

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

.text-button.danger:hover {
  color: var(--danger);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  width: min(1880px, calc(100% - clamp(24px, 5vw, 80px)));
  margin: 0 auto;
  padding: 22px 0 34px;
  border-top: 1px solid var(--border);
  color: var(--text-faint);
  font-size: 10px;
}

.site-footer p {
  margin: 0;
}

.confirm-dialog {
  width: min(440px, calc(100% - 28px));
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface-elevated);
  color: var(--text);
  box-shadow: var(--shadow-lg);
}

.confirm-dialog::backdrop {
  background: rgba(4, 6, 12, 0.55);
  backdrop-filter: blur(5px);
}

.confirm-dialog form {
  padding: 24px;
}

.confirm-dialog p:not(.overline) {
  margin: 10px 0 22px;
  color: var(--text-muted);
  font-size: 13px;
}

.dialog-actions {
  justify-content: flex-end;
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 80;
  transform: translateY(16px);
  max-width: min(360px, calc(100% - 36px));
  padding: 11px 14px;
  border: 1px solid color-mix(in srgb, var(--success) 25%, var(--border));
  border-radius: 11px;
  background: var(--surface-elevated);
  color: var(--text);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  font-size: 12px;
  font-weight: 700;
  transition: 180ms ease;
}

.toast[data-variant="error"] {
  border-color: color-mix(in srgb, var(--danger) 35%, var(--border));
}

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

@media (max-width: 1320px) {
  .workspace {
    grid-template-columns: minmax(220px, 0.72fr) minmax(480px, 1.55fr);
  }

  .preview-panel {
    position: relative;
    top: auto;
    grid-column: 1 / -1;
  }

  .output-shell {
    min-height: 340px;
    max-height: none;
  }
}

@media (max-width: 900px) {
  .hero {
    display: grid;
  }

  .shortcut-card {
    display: none;
  }

  .workspace {
    grid-template-columns: 1fr;
  }

  .library-panel,
  .preview-panel {
    grid-column: auto;
  }

  .library-panel {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .panel-section + .panel-section {
    border-top: 0;
    border-left: 1px solid var(--border);
  }

  .privacy-note {
    grid-column: 1 / -1;
  }

  .document-settings {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 620px) {
  .topbar {
    min-height: 64px;
    padding-inline: 14px;
  }

  .brand small,
  .privacy-pill,
  .topbar-actions a {
    display: none;
  }

  .app-shell {
    width: min(100% - 20px, 1880px);
    padding-top: 34px;
  }

  .hero h1 {
    font-size: clamp(38px, 13vw, 56px);
  }

  .hero-copy {
    font-size: 15px;
  }

  .library-panel {
    display: block;
  }

  .panel-section + .panel-section {
    border-top: 1px solid var(--border);
    border-left: 0;
  }

  .builder-panel,
  .preview-panel {
    padding: 15px;
    border-radius: 18px;
  }

  .builder-header,
  .preview-header {
    align-items: flex-start;
  }

  .document-settings {
    grid-template-columns: 1fr;
  }

  .check-setting {
    min-height: 28px;
  }

  .section-label {
    display: none;
  }

  .section-actions {
    gap: 2px;
  }

  .field-grid {
    padding: 12px;
  }

  .output-shell {
    min-height: 300px;
  }

  .site-footer {
    display: grid;
    width: calc(100% - 24px);
  }
}

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