/*
 * Rails product layer. Layout rules for server-rendered product pages.
 * Tokens and controls are shared with the public site and React player.
 */

html {
  overflow-y: scroll;
  scroll-padding-top: 5.25rem;
}

.product-page {
  min-height: 100dvh;
  padding: 0;
  background-color: var(--color-paper);
  background-image: none;
}

.product-page h1 {
  max-width: 19ch;
  font-size: var(--text-display);
  line-height: 1.07;
}

.product-page h2 { letter-spacing: -0.015em; }
.product-page :focus-visible { outline-color: var(--color-focus); }

.skip-link {
  position: fixed;
  z-index: 400;
  inset-block-start: 0.75rem;
  inset-inline-start: 0.75rem;
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-small);
  background: var(--color-ink);
  color: var(--color-paper-2);
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform var(--dur-short) var(--ease-out);
}

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

.site-header {
  position: sticky;
  z-index: var(--z-sticky);
  inset-block-start: 0;
  border-block-end: 1px solid var(--color-rule);
  background: var(--color-paper-2);
}

.site-nav,
.site-footer,
.app-shell {
  width: min(calc(100% - 2 * var(--page-gutter)), var(--shell-width));
  margin-inline: auto;
}

.site-nav {
  min-height: var(--header-height);
  gap: 1rem;
}

.wordmark {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  color: var(--color-ink);
  font-size: 1rem;
  letter-spacing: -0.025em;
}

.site-nav__links { display: none; }
.site-nav__links form { display: contents; }

.nav-link {
  position: relative;
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding-inline: 0.7rem;
  color: var(--color-muted);
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  transition-property: color, background-color, transform;
  transition-duration: var(--dur-short), var(--dur-short), var(--dur-micro);
  transition-timing-function: var(--ease-out);
}

.nav-link::after {
  content: "";
  position: absolute;
  inset-inline: 0.7rem;
  inset-block-end: 0.25rem;
  height: 2px;
  background: transparent;
}

.nav-link.is-active { color: var(--color-ink); }
.nav-link.is-active::after { background: var(--color-accent); }

.nav-link--utility {
  margin-inline-start: 0.25rem;
  padding-inline-start: 1rem;
  border-inline-start: 1px solid var(--color-rule);
}

.nav-button {
  min-width: max-content;
  padding-inline: 0.7rem;
}

.mobile-nav summary {
  min-width: 3.35rem;
  padding-inline: 0.75rem;
  border-color: var(--color-rule-strong);
  border-radius: var(--radius-small);
  font-size: 0.85rem;
  font-weight: 700;
  transition-property: background-color, color, transform;
  transition-duration: var(--dur-short), var(--dur-short), var(--dur-micro);
  transition-timing-function: var(--ease-out);
}

.mobile-nav[open] summary {
  background: var(--color-paper-3);
  color: var(--color-ink);
}

.mobile-nav nav {
  inset-block-start: calc(100% + 0.55rem);
  width: min(18rem, calc(100dvw - 2rem));
  padding: 0.5rem;
  gap: 0.1rem;
  border-radius: var(--radius-medium);
  box-shadow: 0 1rem 2.5rem -1rem var(--color-shadow-float);
}

.mobile-nav nav a,
.mobile-nav nav button {
  width: 100%;
  padding-inline: 0.75rem;
  border-radius: var(--radius-small);
  font-weight: 600;
}

.mobile-nav nav a.is-active {
  background: var(--color-accent-soft);
  color: var(--color-ink);
  box-shadow: inset 3px 0 0 var(--color-accent);
}

.mobile-nav nav form { margin: 0; }

.app-shell {
  min-height: calc(100dvh - 13rem);
  padding-block: clamp(2.75rem, 7vw, 6rem) clamp(5rem, 9vw, 8rem);
}

.app-shell:focus { outline: 0; }

.site-footer {
  display: grid;
  gap: 1.25rem;
  padding-block: 2rem 2.75rem;
}

.site-footer > div {
  display: grid;
  gap: 0.1rem;
}

.site-footer strong { color: var(--color-ink); }

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
}

.site-footer a {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
}

.flash-stack { inset-block-start: 5rem; }
.flash { border-radius: var(--radius-medium); }

.page-head,
.lesson-head {
  gap: 1.75rem;
  padding-block: 0 clamp(3.5rem, 8vw, 6rem);
}

.page-head--workbench { padding-block-end: clamp(2.75rem, 6vw, 4.5rem); }

.page-head > div > p:last-child,
.lesson-head__artist,
.auth-intro p:last-child {
  max-width: 58ch;
  line-height: 1.65;
}

.page-actions {
  justify-content: flex-start;
  gap: 0.5rem;
}
.nav-link:active,
.mobile-nav summary:active { transform: translateY(1px); }

.lesson-actions form,
.asset-list__actions form,
.page-actions form { margin: 0; }

.stat-rail {
  gap: 0;
  background: transparent;
}

.stat-rail > div + div { border-inline-start: 1px solid var(--color-rule); }

.stat-rail dd {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  font-variant-numeric: tabular-nums;
}

.workbench-section,
.prose-section,
.phrase-preview { padding-block: clamp(2.75rem, 6vw, 4.75rem); }

.workbench-section + .workbench-section,
.workbench-section + .prose-section,
.prose-section + .workbench-section { border-block-start: 1px solid var(--color-rule); }

.section-head { margin-block-end: 1.5rem; }

.lesson-entry__raga {
  color: var(--color-accent);
  font-weight: 700;
}

.lesson-entry__facts,
.media-entry dl {
  padding-block-start: 1rem;
  border-block-start: 1px solid var(--color-rule);
}

.lesson-entry,
.media-entry {
  transition-property: background-color, box-shadow;
  transition-duration: var(--dur-short);
  transition-timing-function: var(--ease-out);
}

.lesson-entry:focus-within,
.media-entry:focus-within {
  background: var(--color-paper-3);
  box-shadow: inset 0 -2px 0 var(--color-accent);
}

.filter-link {
  border-radius: var(--radius-small);
  font-weight: 600;
}

.filter-link.is-active {
  background: var(--color-accent-soft);
  color: var(--color-ink);
  box-shadow: inset 0 -2px 0 var(--color-accent);
}

.editor-form {
  max-width: 64rem;
  gap: 1.5rem;
}

.editor-form > .button { justify-self: start; }

.field-grid { gap: 1rem 1.25rem; }

.discover-form,
.inline-editor,
.stem-pack-form,
.operator-form { grid-template-columns: minmax(0, 1fr); }

.form-section[open] summary {
  padding-block-end: 0.75rem;
  border-block-end: 1px solid var(--color-rule);
}

.ownership-note {
  grid-template-columns: minmax(0, 1fr);
  gap: 0.35rem;
  border-inline-start: 3px solid var(--color-accent);
}

.ownership-note strong { color: var(--color-ink); }

.activity-list article,
.activity-list--full article { grid-template-columns: minmax(0, 1fr); }

.activity-list article strong a,
.asset-list article strong a,
.operator-list article strong a {
  text-decoration-color: transparent;
  transition-property: color, text-decoration-color;
  transition-duration: var(--dur-short);
  transition-timing-function: var(--ease-out);
}

.asset-list .asset-list__actions { justify-content: flex-start; }
.operator-list > article { gap: 1rem; }

.ops-grid {
  gap: 4.5rem;
  padding-block: 4.5rem;
}

.leader-list__rank {
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

.phrase-row,
.phrase-row--new { grid-template-columns: minmax(0, 1fr); }

.publish-panel > form {
  display: grid;
  flex: 1 1 28rem;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
}

.auth-shell {
  min-height: min(44rem, calc(100dvh - 13rem));
  align-content: center;
  grid-template-columns: minmax(0, 1fr);
}

.auth-intro h1 { max-width: 13ch; }
.auth-divider { margin-block: 1.25rem; }

.auth-links {
  padding-block-start: 1rem;
  border-block-start: 1px solid var(--color-rule);
}

.auth-links a {
  color: var(--color-muted);
  font-weight: 600;
}

.product-page--pricing .page-head h1 { font-variant-numeric: tabular-nums; }

.product-page--pricing .workbench-section {
  max-width: 48rem;
  border-block: 1px solid var(--color-rule);
  background: var(--color-paper-2);
}

.product-page--pricing .workbench-section ul {
  display: grid;
  margin: 1.5rem 0 1.75rem;
  padding: 0;
  list-style: none;
}

.product-page--pricing .workbench-section li {
  position: relative;
  padding: 0.8rem 0 0.8rem 1.5rem;
  border-block-end: 1px solid var(--color-rule);
}

.product-page--pricing .workbench-section li::before {
  content: "";
  position: absolute;
  inset-block-start: 1.15rem;
  inset-inline-start: 0.2rem;
  width: 0.5rem;
  height: 0.5rem;
  border: 2px solid var(--color-accent);
  border-radius: 50%;
}

@media (hover: hover) and (pointer: fine) {

  .nav-link:hover,
  .mobile-nav summary:hover {
    background: var(--color-paper-3);
    color: var(--color-ink);
  }

  .lesson-entry:hover,
  .media-entry:hover {
    background: var(--color-paper-3);
    box-shadow: inset 0 -2px 0 var(--color-accent);
  }

  .activity-list article strong a:hover,
  .asset-list article strong a:hover,
  .operator-list article strong a:hover {
    color: var(--color-focus);
    text-decoration-color: var(--color-accent);
  }
}

@media (min-width: 40rem) {
  .site-footer {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: start;
  }

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

  .ownership-note {
    grid-template-columns: minmax(10rem, 0.28fr) minmax(0, 1fr);
    gap: 1.5rem;
  }
}

@media (min-width: 48rem) {
  .activity-list:not(.activity-list--full) article {
    grid-template-columns: minmax(12rem, 2fr) repeat(3, minmax(6rem, 1fr));
    align-items: center;
  }

  .auth-shell {
    grid-template-columns: minmax(0, 0.8fr) minmax(20rem, 1.2fr);
  }
}

@media (min-width: 56rem) {
  .site-nav__links {
    display: flex;
    align-items: center;
    gap: 0.1rem;
  }

  .mobile-nav { display: none; }

  .activity-list--full article {
    grid-template-columns: minmax(12rem, 2fr) minmax(13rem, 1.35fr) repeat(4, minmax(5.5rem, 0.75fr));
    align-items: center;
  }

  .phrase-row {
    grid-template-columns: minmax(5rem, 0.5fr) minmax(9rem, 1.5fr) repeat(3, minmax(6rem, 1fr)) auto;
  }

  .phrase-row--new {
    grid-template-columns: minmax(9rem, 1.5fr) repeat(3, minmax(6rem, 1fr)) auto;
  }

  .publish-panel > form {
    grid-template-columns: repeat(2, minmax(10rem, 1fr)) auto;
    align-items: end;
  }

  .operator-form { grid-template-columns: repeat(2, minmax(8rem, 1fr)) auto; }

  .inline-editor { grid-template-columns: repeat(3, minmax(0, 1fr)) auto; }
  .inline-editor.editor-invite { grid-template-columns: minmax(0, 1fr) auto; }
  .stem-pack-form { grid-template-columns: repeat(3, minmax(0, 1fr)) auto; }

  .operator-review-form {
    grid-template-columns: minmax(10rem, 0.65fr) minmax(16rem, 1.35fr) auto;
  }
}

@media (min-width: 60rem) {
  .discover-form {
    grid-template-columns: minmax(18rem, 2fr) repeat(2, minmax(9rem, 1fr)) auto;
  }

  .discover-form__actions { grid-column: auto; }
}

@media (min-width: 72rem) {
  .operator-list > article {
    grid-template-columns: minmax(14rem, 0.75fr) minmax(0, 2fr);
  }
}

@media (max-width: 55.999rem) {
  .site-nav__links { display: none; }
  .mobile-nav { display: block; }
}

@media (max-width: 39.999rem) {
  .site-nav,
  .site-footer,
  .app-shell { width: min(calc(100% - 3rem), var(--shell-width)); }

  .product-page h1 { font-size: clamp(2.2rem, 12vw, 3.3rem); }

  .page-actions,
  .lesson-actions,
  .form-actions { align-items: stretch; }

  .page-actions .button,
  .lesson-actions .button,
  .form-actions .button { flex: 1 1 auto; }

  .stat-rail > div:nth-child(odd) { border-inline-start: 0; }
  .stat-rail > div:nth-child(n + 3) { border-block-start: 1px solid var(--color-rule); }
  .asset-list article { display: grid; }

  .lesson-entry__facts,
  .media-entry dl { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .lesson-entry__facts > div:last-child,
  .media-entry dl > div:last-child { grid-column: 1 / -1; }

  .publish-checklist li {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.35rem;
  }

  .danger-zone .button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .skip-link,
  .nav-link,
  .mobile-nav summary,
  .lesson-entry,
  .media-entry { transition-duration: 0s; }
  .nav-link:active,
  .mobile-nav summary:active { transform: none; }
}

/* Product surfaces share the homepage's quiet canvas and generous hierarchy. */
.product-page :is(h1, h2) { font-weight: 650; letter-spacing: -0.04em; }
.product-page h3 { font-weight: 600; }
.product-page .kicker { font-weight: 500; color: var(--color-accent); letter-spacing: 0; }
.product-page .auth-panel { border: 0; border-radius: var(--radius-large); box-shadow: var(--shadow-surface); padding: clamp(1.5rem, 4vw, 3rem); }
.product-page .lesson-grid, .product-page .media-grid { gap: 1.5rem; background: transparent; border: 0; }
.product-page .lesson-entry, .product-page .media-entry { border: 0; border-radius: var(--radius-large); box-shadow: var(--shadow-surface); }
.product-page .lesson-entry__main, .product-page .media-entry__main { padding: 2rem; }
.product-page .filter-link { border-radius: var(--radius-round); }
.product-page .site-footer { color: var(--color-muted); font-size: var(--text-sm); }
.product-page .empty-state { border-radius: var(--radius-large); background: var(--color-surface-raised); border: 0; }

.site-nav > .wordmark { margin-inline-end: auto; }
.site-nav > .theme-toggle { margin-inline-start: 0.25rem; }

.ai-processing-icon { display: inline-block; width: 1.1em; height: 1.1em; flex-shrink: 0; vertical-align: -.15em; color: var(--color-focus); }