/**
 * LabScope Editorial Design System — Phase B
 * Shared premium layout for singles, archives, pages, search, 404.
 */

:root {
  --pp-space-xs: 0.5rem;
  --pp-space-sm: 1rem;
  --pp-space-md: 1.5rem;
  --pp-space-lg: 2.5rem;
  --pp-space-xl: 4rem;
  --pp-space-2xl: 6rem;
  --pp-read-max: 42rem;
  --pp-sidebar-width: 320px;
  --pp-radius-lg: 16px;
  --pp-radius-xl: 24px;
  --pp-shadow-soft: 0 1px 2px color-mix(in srgb, var(--pp-dark) 4%, transparent), 0 12px 40px color-mix(in srgb, var(--pp-dark) 6%, transparent);
  --pp-shadow-card: 0 1px 2px color-mix(in srgb, var(--pp-dark) 4%, transparent), 0 8px 24px color-mix(in srgb, var(--pp-dark) 6%, transparent);
  --pp-transition: 240ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Editorial masthead (archives, pages) --- */
.pp-editorial-masthead {
  position: relative;
  padding: clamp(2.5rem, 5vw, 4.5rem) 0;
  margin-bottom: var(--pp-space-lg);
  overflow: hidden;
}

.pp-editorial-masthead__backdrop {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 12% 0%, color-mix(in srgb, var(--pp-primary) 14%, transparent), transparent 52%),
    radial-gradient(circle at 88% 20%, color-mix(in srgb, var(--pp-accent) 10%, transparent), transparent 45%),
    linear-gradient(180deg, var(--pp-surface-muted, var(--pp-bg)), var(--pp-bg));
  border-bottom: 1px solid color-mix(in srgb, var(--pp-primary) 10%, var(--pp-border));
}

.pp-editorial-masthead .pp-container {
  position: relative;
  z-index: 1;
}

.pp-archive-header__eyebrow,
.pp-editorial-section-header__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  margin-bottom: .75rem;
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--pp-primary);
}

.pp-archive-header__eyebrow::before,
.pp-editorial-section-header__eyebrow::before {
  content: "";
  width: 1.5rem;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--pp-primary), var(--pp-accent));
}

.pp-archive-header--research .pp-archive-header__title,
.pp-page--editorial .pp-page__title {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  max-width: 18ch;
}

.pp-archive-header__desc {
  max-width: 52ch;
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--pp-text-muted);
}

/* --- Research hero --- */
.pp-research-hero {
  position: relative;
  padding: clamp(2rem, 4vw, 3.5rem) 0 clamp(1.5rem, 3vw, 2.5rem);
  overflow: hidden;
}

.pp-research-hero__backdrop {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 0% 0%, color-mix(in srgb, var(--pp-primary) 12%, transparent), transparent),
    linear-gradient(180deg, var(--pp-surface-muted, var(--pp-bg)), transparent 85%);
  pointer-events: none;
}

.pp-research-hero .pp-container {
  position: relative;
  z-index: 1;
}

.pp-research-hero__grid {
  display: grid;
  gap: clamp(1.75rem, 3vw, 2.75rem);
  align-items: start;
  margin-top: 1.25rem;
}

@media (min-width: 960px) {
  .pp-research-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(280px, .85fr);
  }
}

.pp-research-hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin-bottom: 1rem;
}

.pp-badge--research {
  background: linear-gradient(135deg, var(--pp-primary), color-mix(in srgb, var(--pp-accent) 70%, var(--pp-primary)));
  color: #fff;
  border: none;
}

.pp-research-hero__title {
  margin: 0 0 1rem;
  font-family: var(--pp-font-heading);
  font-size: clamp(2.1rem, 4.5vw, 3.35rem);
  line-height: 1.06;
  letter-spacing: -0.035em;
  max-width: 16ch;
}

.pp-research-hero__lead {
  margin: 0 0 1.5rem;
  font-size: clamp(1.05rem, 1.8vw, 1.2rem);
  line-height: 1.65;
  color: var(--pp-text-muted);
  max-width: 48ch;
}

.pp-research-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: .85rem 1.25rem;
  margin: 0;
  padding: 1rem 1.15rem;
  border-radius: var(--pp-radius-lg);
  background: color-mix(in srgb, var(--pp-surface) 88%, transparent);
  border: 1px solid color-mix(in srgb, var(--pp-primary) 10%, var(--pp-border));
  box-shadow: var(--pp-shadow-soft);
  backdrop-filter: blur(10px);
}

.pp-research-meta__item {
  display: grid;
  gap: .2rem;
}

.pp-research-meta__item dt {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  margin: 0;
  font-size: .68rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--pp-text-muted);
}

.pp-research-meta__item dt .pp-icon {
  color: var(--pp-primary);
}

.pp-research-meta__item dd {
  margin: 0;
  font-size: .95rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.pp-research-hero__figure {
  margin: 0;
  border-radius: calc(var(--pp-radius-lg) + 4px);
  overflow: hidden;
  box-shadow: var(--pp-shadow-soft);
  border: 1px solid color-mix(in srgb, var(--pp-primary) 10%, var(--pp-border));
}

.pp-research-hero__image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.pp-research-hero__caption {
  padding: .85rem 1rem;
  font-size: .82rem;
  line-height: 1.5;
  color: var(--pp-text-muted);
  background: var(--pp-surface);
  border-top: 1px solid var(--pp-border);
}

/* --- Jump nav --- */
.pp-editorial-jump {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding: .65rem;
  margin: 0 0 var(--pp-space-lg);
  border-radius: 999px;
  background: var(--pp-surface);
  border: 1px solid var(--pp-border);
  box-shadow: var(--pp-shadow-card);
}

.pp-editorial-jump a {
  display: inline-flex;
  align-items: center;
  padding: .55rem 1rem;
  border-radius: 999px;
  font-size: .84rem;
  font-weight: 700;
  color: var(--pp-text-muted);
  transition: background var(--pp-transition), color var(--pp-transition), transform var(--pp-transition);
}

.pp-editorial-jump a:hover,
.pp-editorial-jump a.is-active {
  color: var(--pp-primary);
  background: color-mix(in srgb, var(--pp-primary) 8%, transparent);
}

.pp-editorial-jump.is-stuck {
  position: sticky;
  top: calc(72px + .75rem);
  z-index: 40;
}

/* --- Sidebar layout --- */
.pp-layout--research-single {
  display: grid;
  gap: clamp(2rem, 4vw, 3rem);
  align-items: start;
}

@media (min-width: 1080px) {
  .pp-layout--research-single {
    grid-template-columns: var(--pp-sidebar-width) minmax(0, 1fr);
  }
}

.pp-editorial-sidebar {
  display: grid;
  gap: 1rem;
}

@media (min-width: 1080px) {
  .pp-editorial-sidebar {
    position: sticky;
    top: calc(72px + 1rem);
  }
}

.pp-editorial-panel {
  padding: 1.15rem 1.2rem;
  border-radius: var(--pp-radius-lg);
  background: var(--pp-surface);
  border: 1px solid var(--pp-border);
  box-shadow: var(--pp-shadow-card);
}

.pp-editorial-panel__title {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin: 0 0 .85rem;
  font-size: .92rem;
  font-weight: 800;
}

.pp-editorial-panel__title .pp-icon {
  color: var(--pp-primary);
}

/* --- TOC premium --- */
.pp-toc--premium {
  padding-bottom: .5rem;
}

.pp-toc--premium .pp-toc__list a {
  display: block;
  padding: .45rem .65rem;
  margin-inline: -.35rem;
  border-radius: 8px;
  font-size: .88rem;
  line-height: 1.45;
  color: var(--pp-text-muted);
  border-left: 2px solid transparent;
  transition: color var(--pp-transition), background var(--pp-transition), border-color var(--pp-transition), transform var(--pp-transition);
}

.pp-toc--premium .pp-toc__list a:hover {
  color: var(--pp-primary);
  background: color-mix(in srgb, var(--pp-primary) 6%, transparent);
}

.pp-toc--premium .pp-toc__list a.is-active {
  color: var(--pp-primary);
  font-weight: 700;
  border-left-color: var(--pp-primary);
  background: color-mix(in srgb, var(--pp-primary) 8%, transparent);
  transform: translateX(2px);
}

/* --- Data lists & downloads --- */
.pp-data-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .65rem;
}

.pp-data-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: .65rem;
  border-bottom: 1px solid color-mix(in srgb, var(--pp-border) 80%, transparent);
}

.pp-data-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.pp-data-list span {
  font-size: .78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--pp-text-muted);
}

.pp-data-list strong {
  font-size: .92rem;
  font-variant-numeric: tabular-nums;
}

.pp-download-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .55rem;
}

.pp-download-item {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem .85rem;
  border-radius: 12px;
  border: 1px solid var(--pp-border);
  background: var(--pp-surface-muted, var(--pp-bg));
  transition: transform var(--pp-transition), border-color var(--pp-transition), box-shadow var(--pp-transition);
}

.pp-download-item:hover {
  border-color: color-mix(in srgb, var(--pp-primary) 22%, var(--pp-border));
  box-shadow: var(--pp-shadow-card);
  transform: translateY(-2px);
}

.pp-download-item__icon {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 10px;
  background: color-mix(in srgb, var(--pp-primary) 10%, transparent);
  color: var(--pp-primary);
}

.pp-download-item__text {
  display: grid;
  gap: .15rem;
}

.pp-download-item__text strong {
  font-size: .88rem;
}

.pp-download-item__text small {
  font-size: .75rem;
  color: var(--pp-text-muted);
}

/* --- Reading content --- */
.pp-content--editorial {
  font-size: 1.125rem;
  line-height: 1.78;
  max-width: var(--pp-read-max);
}

.pp-content--editorial > :first-child {
  margin-top: 0;
}

.pp-content--editorial h2 {
  margin: 2.75rem 0 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid color-mix(in srgb, var(--pp-primary) 12%, var(--pp-border));
  font-size: clamp(1.35rem, 2.5vw, 1.65rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.pp-content--editorial h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.pp-content--editorial h3 {
  margin: 1.75rem 0 .75rem;
  font-size: 1.15rem;
}

.pp-content--editorial p {
  margin: 0 0 1.35rem;
}

.pp-content--editorial ul,
.pp-content--editorial ol {
  margin: 0 0 1.35rem;
  padding-left: 1.35rem;
}

.pp-content--editorial li + li {
  margin-top: .45rem;
}

.pp-content--editorial blockquote {
  margin: 1.75rem 0;
  padding: 1.15rem 1.25rem;
  border-left: 3px solid var(--pp-primary);
  border-radius: 0 12px 12px 0;
  background: color-mix(in srgb, var(--pp-primary) 5%, var(--pp-surface-muted, var(--pp-bg)));
  font-style: italic;
}

/* --- Section bands --- */
.pp-editorial-band {
  margin-top: var(--pp-space-xl);
  padding: var(--pp-space-lg) 0;
}

.pp-editorial-band--muted {
  margin-top: var(--pp-space-xl);
  padding: var(--pp-space-xl) 0;
  background:
    linear-gradient(180deg, transparent, color-mix(in srgb, var(--pp-primary) 4%, var(--pp-bg)) 20%, color-mix(in srgb, var(--pp-primary) 4%, var(--pp-bg)) 80%, transparent);
  border-block: 1px solid color-mix(in srgb, var(--pp-primary) 8%, var(--pp-border));
}

.pp-editorial-section-header {
  margin-bottom: 1.75rem;
}

.pp-editorial-section-header__title {
  margin: 0;
  font-size: clamp(1.5rem, 2.5vw, 1.85rem);
  letter-spacing: -0.02em;
}

.pp-citation-list {
  margin: 0;
  padding-left: 1.25rem;
  display: grid;
  gap: .85rem;
  max-width: var(--pp-read-max);
}

.pp-citation-list li {
  padding-left: .35rem;
  line-height: 1.65;
  color: var(--pp-text-muted);
}

.pp-citation-list li::marker {
  color: var(--pp-primary);
  font-weight: 800;
}

/* --- Reading progress premium --- */
.pp-reading-progress--premium {
  position: relative;
  height: 4px;
  box-shadow: 0 0 12px color-mix(in srgb, var(--pp-accent) 35%, transparent);
}

/* --- Article single editorial upgrade --- */
.pp-article-single--editorial .pp-article-single__header {
  padding: clamp(2rem, 4vw, 3rem) 0 1.5rem;
}

.pp-article-single--editorial .pp-article-single__title {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  max-width: 18ch;
}

.pp-article-single--editorial .pp-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem 1.25rem;
  padding: .85rem 1rem;
  border-radius: var(--pp-radius-lg);
  background: var(--pp-surface);
  border: 1px solid var(--pp-border);
  box-shadow: var(--pp-shadow-card);
}

/* --- Search page --- */
.pp-search-page--editorial {
  padding: 1.25rem;
  border-radius: var(--pp-radius-lg);
  background: var(--pp-surface);
  border: 1px solid var(--pp-border);
  box-shadow: var(--pp-shadow-card);
  margin-bottom: var(--pp-space-lg);
}

.pp-search-page--editorial .pp-search-page__bar {
  display: grid;
  gap: .75rem;
}

@media (min-width: 640px) {
  .pp-search-page--editorial .pp-search-page__bar {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

/* --- 404 --- */
.pp-404--editorial {
  position: relative;
  text-align: center;
  padding: clamp(3rem, 8vw, 6rem) 1rem;
  border-radius: calc(var(--pp-radius-lg) + 4px);
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 0%, color-mix(in srgb, var(--pp-primary) 10%, transparent), transparent 55%),
    var(--pp-surface);
  border: 1px solid var(--pp-border);
  box-shadow: var(--pp-shadow-soft);
}

.pp-404--editorial .pp-404__code {
  display: block;
  margin-bottom: .5rem;
  font-size: clamp(4rem, 12vw, 7rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.06em;
  background: linear-gradient(135deg, var(--pp-primary), var(--pp-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.pp-404--editorial .pp-404__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: .75rem;
}

.pp-404--editorial .pp-404__text {
  max-width: 42ch;
  margin: 0 auto 1.5rem;
  color: var(--pp-text-muted);
}

/* --- Page template --- */
.pp-page--editorial .pp-page__header {
  padding: clamp(2rem, 4vw, 3rem) 0 1.5rem;
  border-bottom: 1px solid var(--pp-border);
  margin-bottom: var(--pp-space-lg);
}

.pp-page--editorial .pp-content {
  font-size: 1.0625rem;
  line-height: 1.75;
  max-width: var(--pp-read-max);
}

/* --- Author archive --- */
.pp-author-header--editorial {
  display: grid;
  gap: 1.25rem;
  padding: clamp(2rem, 4vw, 3rem);
  border-radius: calc(var(--pp-radius-lg) + 4px);
  background:
    radial-gradient(circle at 0% 0%, color-mix(in srgb, var(--pp-primary) 8%, transparent), transparent 50%),
    var(--pp-surface);
  border: 1px solid var(--pp-border);
  box-shadow: var(--pp-shadow-soft);
  margin-bottom: var(--pp-space-lg);
}

@media (min-width: 640px) {
  .pp-author-header--editorial {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: start;
  }
}

.pp-author-header--editorial .pp-author-header__avatar {
  border-radius: 20px;
  border: 3px solid color-mix(in srgb, var(--pp-primary) 15%, transparent);
}

/* --- Archive header variants --- */
.pp-archive-header--research,
.pp-archive-header--article,
.pp-archive-header--review {
  position: relative;
}

.pp-archive-header--company,
.pp-archive-header--research {
  padding: clamp(2rem, 4vw, 3.5rem) 0;
}

@media (max-width: 1079px) {
  .pp-editorial-sidebar {
    order: 2;
  }

  .pp-layout--research-single .pp-layout__content {
    order: 1;
  }

  .pp-editorial-jump.is-stuck {
    position: static;
  }
}

@media (max-width: 767px) {
  .pp-research-meta {
    grid-template-columns: 1fr 1fr;
  }

  .pp-research-hero__title {
    max-width: none;
  }
}

/* --- Article single layout --- */
.pp-layout--article-single {
  display: grid;
  gap: clamp(2rem, 4vw, 3rem);
  align-items: start;
}

@media (min-width: 1080px) {
  .pp-layout--article-single {
    grid-template-columns: var(--pp-sidebar-width) minmax(0, 1fr);
  }
}

.pp-article-single__hero {
  margin-bottom: var(--pp-space-lg);
  border-radius: calc(var(--pp-radius-lg) + 4px);
  overflow: hidden;
  box-shadow: var(--pp-shadow-soft);
}

.pp-article-single__hero img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.pp-404--editorial .pp-404__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  justify-content: center;
}

[data-theme="dark"] .pp-editorial-panel,
:root.dark-mode .pp-editorial-panel {
  background: var(--pp-surface-elevated, var(--pp-surface));
  border-color: color-mix(in srgb, var(--pp-border) 120%, transparent);
}

[data-theme="dark"] .pp-research-meta,
:root.dark-mode .pp-research-meta {
  background: color-mix(in srgb, var(--pp-surface) 70%, transparent);
}