/* Prompting guide (/irankiai/promptu-gidas + model pages).
   Editorial paper palette shared with the rest of public-editorial-*:
   paper #fffef9, ink #15231d, muted #536057, rule rgba(21, 35, 29, .18).
   Sticky elements here carry no backdrop-filter (runtime blur budget). */

.guide-page {
  --guide-accent: #3d8741;
  --guide-paper: #fffef9;
  --guide-ink: #15231d;
  --guide-muted: #536057;
  --guide-rule: rgba(21, 35, 29, 0.18);
}

.guide-page[data-model='claude-opus-5'] {
  --guide-accent: #c2603a;
}
.guide-page[data-model='claude-sonnet-5'] {
  --guide-accent: #b0803c;
}
.guide-page[data-model='claude-fable-5-1'] {
  --guide-accent: #8d4f89;
}
.guide-page[data-model='gpt-6-astra'] {
  --guide-accent: #0f8c6d;
}

.guide-page .page-hero__title {
  max-width: 18ch;
}

/* Anchor targets clear the sticky site header when linked from the contents. */
.guide-anchor {
  scroll-margin-top: 6rem;
}

.guide-layout {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
}

.guide-content {
  min-width: 0;
}

/* ---------- Table of contents ---------- */

/* One list, two layouts. On mobile the toggle button controls it; from 1024px
   the button and its state are ignored and the rail is always visible. */
.guide-toc {
  position: sticky;
  top: 4.5rem;
  z-index: 5;
  border: 1px solid var(--guide-rule);
  border-radius: 0.75rem;
  background: var(--guide-paper);
}

.guide-toc__toggle {
  display: flex;
  width: 100%;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1rem;
  color: var(--guide-ink);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 700;
  text-align: left;
}

.guide-toc__chevron {
  margin-left: auto;
  transition: transform 160ms ease;
}

.guide-toc__toggle[aria-expanded='true'] .guide-toc__chevron {
  transform: rotate(180deg);
}

.guide-toc__title {
  display: none;
  margin-bottom: 0.75rem;
  color: var(--guide-accent);
  font-family: 'Fira Code', ui-monospace, monospace;
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.guide-toc__list {
  display: none;
  flex-direction: column;
  gap: 0.1rem;
  margin: 0;
  padding: 0 1rem 1rem;
  list-style: none;
}

.guide-toc__list[data-open='true'] {
  display: flex;
  border-top: 1px solid var(--guide-rule);
  padding-top: 0.75rem;
}

.guide-toc__link {
  display: block;
  padding: 0.4rem 0 0.4rem 0.85rem;
  border-left: 2px solid var(--guide-rule);
  color: var(--guide-muted);
  font-size: 0.85rem;
  line-height: 1.4;
  text-decoration: none;
  transition:
    color 160ms ease,
    border-color 160ms ease;
}

.guide-toc__link:hover {
  color: var(--guide-ink);
}

.guide-toc__link.is-active {
  border-left-color: var(--guide-accent);
  color: var(--guide-ink);
  font-weight: 600;
}

/* ---------- Principles ---------- */

.guide-principles {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.guide-principle {
  padding-top: 1.75rem;
  border-top: 1px solid var(--guide-rule);
}

.guide-principle:first-child {
  padding-top: 0;
  border-top: 0;
}

.guide-principle__header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.guide-principle__number {
  flex: none;
  color: var(--guide-accent);
  font-family: 'Fira Code', ui-monospace, monospace;
  font-size: 0.95rem;
  font-weight: 800;
}

.guide-principle__title {
  color: var(--guide-ink);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  font-weight: 700;
  line-height: 1.3;
}

.guide-principle__text {
  margin-bottom: 0.85rem;
  color: var(--guide-muted);
  line-height: 1.75;
}

/* API parameter names inside running text. The global `code` rule in the Vite
   bundle paints a dark block, which is far too heavy inline. */
.guide-page .guide-inline-code {
  padding: 0.1em 0.35em;
  border: 1px solid var(--guide-rule);
  border-radius: 0.3rem;
  background: rgba(21, 35, 29, 0.05);
  color: var(--guide-ink);
  font-family: 'Fira Code', ui-monospace, monospace;
  font-size: 0.85em;
  white-space: nowrap;
}

/* ---------- Prompt snippets ---------- */

.guide-snippet {
  margin: 1.25rem 0;
  overflow: hidden;
  border: 1px solid var(--guide-rule);
  border-radius: 0.75rem;
  background: var(--guide-paper);
}

.guide-snippet__purpose {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--guide-rule);
  color: var(--guide-ink);
  font-size: 0.82rem;
  font-weight: 600;
}

.guide-snippet__text {
  margin: 0;
  padding: 1rem;
  overflow-x: auto;
  /* The wrapper already rounds and clips the corners. Without this the global
     `pre { rounded-lg }` rule rounds the dark block too and the card behind it
     shows through every corner as a stacked-container seam. */
  border-radius: 0;
  background: #15231d;
  color: #e6ece7;
  font-family: 'Fira Code', ui-monospace, monospace;
  font-size: 0.8rem;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}

.guide-copy-button {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.7rem;
  border: 1px solid rgba(255, 254, 249, 0.25);
  border-radius: 0.5rem;
  background: rgba(255, 254, 249, 0.1);
  color: #e6ece7;
  cursor: pointer;
  font-family: var(--font-sans, system-ui, -apple-system, 'Segoe UI', sans-serif);
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1.3;
  white-space: nowrap;
  user-select: none;
  transition: background 160ms ease;
}

.guide-copy-button:hover {
  background: rgba(255, 254, 249, 0.2);
}

/* Floated inside the <pre> (not absolutely positioned) so the snippet text
   wraps around the button instead of losing a blank line above it. */
.guide-snippet__copy {
  float: right;
  margin: 0 0 0.35rem 0.75rem;
}

/* ---------- Do-not blocks ---------- */

.guide-avoid {
  margin-top: 1.25rem;
  padding: 0.9rem 1.1rem;
  border-left: 3px solid #c0402f;
  border-radius: 0 0.5rem 0.5rem 0;
  background: rgba(192, 64, 47, 0.06);
}

.guide-avoid__title {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.5rem;
  color: #a1352a;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.guide-avoid ul {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin: 0;
  padding-left: 1.1rem;
  color: var(--guide-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ---------- Checklists ---------- */

.guide-checklist {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.guide-checklist li {
  position: relative;
  padding-left: 1.5rem;
  color: var(--guide-muted);
  line-height: 1.7;
}

.guide-checklist li::before {
  content: '';
  position: absolute;
  top: 0.65rem;
  left: 0.25rem;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--guide-accent);
}

/* ---------- Comparison table ---------- */

.guide-table-scroll {
  overflow-x: auto;
  border: 1px solid var(--guide-rule);
  border-radius: 0.75rem;
}

.guide-table {
  width: 100%;
  min-width: 46rem;
  border-collapse: collapse;
  text-align: left;
}

.guide-table thead th {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--guide-rule);
  background: rgba(21, 35, 29, 0.04);
  color: var(--guide-ink);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.guide-table tbody th,
.guide-table tbody td {
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--guide-rule);
  color: var(--guide-muted);
  font-size: 0.88rem;
  line-height: 1.55;
  vertical-align: top;
}

.guide-table tbody tr:last-child th,
.guide-table tbody tr:last-child td {
  border-bottom: 0;
}

.guide-table tbody th {
  color: var(--guide-ink);
  font-weight: 700;
}

.guide-table tbody th a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

.guide-table__vendor {
  display: block;
  margin-top: 0.15rem;
  color: var(--guide-muted);
  font-size: 0.72rem;
  font-weight: 500;
}

/* ---------- Task cards ---------- */

.guide-task-grid {
  display: grid;
  gap: 1rem;
}

.guide-task-card {
  padding: 1.35rem;
  border: 1px solid var(--guide-rule);
  border-radius: 0.75rem;
  background: var(--guide-paper);
}

.guide-task-card h3 {
  margin-bottom: 0.35rem;
  color: var(--guide-ink);
  font-size: 1.05rem;
  font-weight: 700;
}

.guide-task-card__intro {
  margin-bottom: 0.85rem;
  color: var(--guide-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.guide-task-card__rules {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 0 0 1rem;
  padding-left: 1.1rem;
  color: var(--guide-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

.guide-task-card__models {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--guide-rule);
  font-size: 0.78rem;
}

.guide-task-card__models span {
  color: var(--guide-muted);
  font-weight: 600;
}

.guide-task-card__models a {
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--guide-rule);
  border-radius: 999px;
  color: var(--guide-ink);
  text-decoration: none;
  transition: border-color 160ms ease;
}

.guide-task-card__models a:hover {
  border-color: var(--guide-ink);
}

/* ---------- Model cards ---------- */

.guide-model-grid {
  display: grid;
  gap: 1rem;
}

.guide-model-card {
  --guide-card-accent: #3d8741;
  position: relative;
  display: flex;
  overflow: hidden;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.35rem;
  border: 1px solid var(--guide-rule);
  border-radius: 0.75rem;
  background: var(--guide-paper);
  color: var(--guide-ink);
  text-decoration: none;
  transition:
    border-color 180ms ease,
    transform 180ms ease;
}

.guide-model-card::before {
  content: '';
  position: absolute;
  inset: 0 0 auto;
  height: 0.3rem;
  background: var(--guide-card-accent);
}

.guide-model-card[data-model='claude-opus-5'] {
  --guide-card-accent: #c2603a;
}
.guide-model-card[data-model='claude-sonnet-5'] {
  --guide-card-accent: #b0803c;
}
.guide-model-card[data-model='claude-fable-5-1'] {
  --guide-card-accent: #8d4f89;
}
.guide-model-card[data-model='gpt-6-astra'] {
  --guide-card-accent: #0f8c6d;
}

.guide-model-card:hover {
  border-color: var(--guide-ink);
  transform: translateY(-0.2rem);
}

.guide-model-card__vendor {
  margin-top: 0.35rem;
  color: var(--guide-card-accent);
  font-family: 'Fira Code', ui-monospace, monospace;
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.guide-model-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
}

.guide-model-card p {
  color: var(--guide-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

.guide-model-card__action {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.5rem;
  color: var(--guide-ink);
  font-size: 0.82rem;
  font-weight: 600;
}

/* ---------- Source block ---------- */

.guide-source {
  margin-top: 2rem;
  padding: 1.25rem 1.4rem;
  border: 1px dashed var(--guide-rule);
  border-radius: 0.75rem;
  background: rgba(21, 35, 29, 0.03);
}

.guide-source__title {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.5rem;
  color: var(--guide-accent);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.guide-source__link a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--guide-ink);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  overflow-wrap: anywhere;
}

.guide-source__checked,
.guide-source__note {
  margin-top: 0.4rem;
  color: var(--guide-muted);
  font-size: 0.85rem;
  line-height: 1.6;
}

.guide-footnote {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--guide-rule);
  color: var(--guide-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.guide-footnote a {
  color: var(--guide-ink);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

/* ---------- Prompt optimizer ---------- */

.optimizer,
.optimizer-gate {
  padding: 1.35rem;
  border: 1px solid var(--guide-rule);
  border-radius: 0.75rem;
  background: var(--guide-paper);
}

.optimizer-gate p {
  margin-bottom: 1rem;
  color: var(--guide-muted);
  line-height: 1.7;
}

.optimizer-gate__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.optimizer-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.optimizer-form__row {
  display: grid;
  gap: 1rem;
}

.optimizer-form label {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--guide-ink);
  font-size: 0.82rem;
  font-weight: 600;
}

.optimizer-counter {
  margin-top: 0.4rem;
  color: var(--guide-muted);
  font-family: 'Fira Code', ui-monospace, monospace;
  font-size: 0.72rem;
  text-align: right;
}

.optimizer-counter[data-over='true'] {
  color: #a1352a;
  font-weight: 700;
}

.optimizer-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem;
}

.optimizer-quota {
  color: var(--guide-muted);
  font-size: 0.82rem;
}

.optimizer-error {
  padding: 0.7rem 0.9rem;
  border-left: 3px solid #c0402f;
  border-radius: 0 0.5rem 0.5rem 0;
  background: rgba(192, 64, 47, 0.06);
  color: #a1352a;
  font-size: 0.88rem;
  line-height: 1.6;
}

.optimizer-result {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--guide-rule);
}

.optimizer-result__label {
  margin-bottom: 0.55rem;
  color: var(--guide-accent);
  font-family: 'Fira Code', ui-monospace, monospace;
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.optimizer-result__block .guide-snippet__body {
  overflow: hidden;
  border-radius: 0.75rem;
}

.optimizer-changes {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.optimizer-changes li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}

.optimizer-changes svg {
  flex: none;
  margin-top: 0.2rem;
  color: var(--guide-accent);
}

.optimizer-changes strong {
  display: block;
  color: var(--guide-ink);
  font-size: 0.92rem;
  font-weight: 700;
}

.optimizer-changes span {
  color: var(--guide-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

.optimizer-warnings {
  padding: 0.9rem 1.1rem;
  border-left: 3px solid #d08a1f;
  border-radius: 0 0.5rem 0.5rem 0;
  background: rgba(208, 138, 31, 0.08);
}

.optimizer-warnings__title {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.45rem;
  color: #8a5a10;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.optimizer-warnings ul {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin: 0;
  padding-left: 1.1rem;
  color: var(--guide-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* ---------- Desktop layout ---------- */

@media (min-width: 1024px) {
  .guide-layout {
    grid-template-columns: 15rem minmax(0, 1fr);
    gap: 3rem;
    align-items: start;
  }

  .guide-toc {
    top: 6rem;
    max-height: calc(100vh - 8rem);
    padding: 1.1rem 0.5rem 1.1rem 1.1rem;
    overflow-y: auto;
  }

  .guide-toc__toggle {
    display: none;
  }

  .guide-toc__title {
    display: block;
  }

  .guide-toc__list,
  .guide-toc__list[data-open='true'] {
    display: flex;
    border-top: 0;
    padding: 0;
  }

  .guide-task-grid,
  .guide-model-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 640px) {
  .optimizer-form__row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1280px) {
  .guide-model-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .guide-model-card,
  .guide-model-card:hover {
    transform: none;
    transition: none;
  }
}