/* ==========================================================================
   GISAN SHIPYARD — INSIGHTS & KNOWLEDGE ARCHIVE STYLES
   Desktop Stitch Source of Truth + Locked Responsive Baseline
   ========================================================================== */

/* ── 1. Page Scaffolding ──────────────────────────────────── */
.insights-page {
  background-color: var(--color-background);
  color: var(--color-on-background);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.insights-container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-margin-desktop);
  padding-right: var(--space-margin-desktop);
  box-sizing: border-box;
}

/* ── 2. Hero / Intro Section ──────────────────────────────── */
.insights-hero {
  padding-top: 120px;
  padding-bottom: 48px;
  background-color: var(--color-surface);
}

.insights-hero__grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-gutter);
}

.insights-hero__content {
  grid-column: span 9;
}

.insights-hero__eyebrow {
  font-family: var(--font-primary);
  font-size: var(--text-label-caps-size);
  font-weight: var(--text-label-caps-weight);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-secondary);
  display: block;
  margin-bottom: 12px;
}

.insights-hero__title {
  font-family: var(--font-primary);
  font-size: var(--text-display-xl-size);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin: 0 0 20px 0;
}

.insights-hero__desc {
  font-family: var(--font-primary);
  font-size: var(--text-body-lg-size);
  font-weight: var(--text-body-lg-weight);
  line-height: var(--text-body-lg-lh);
  color: var(--color-on-surface-variant);
  max-width: 780px;
  margin: 0;
}

/* ── 3. Filter Bar (Horizontal) ───────────────────────────── */
.insights-filter {
  margin-bottom: 48px;
}

.insights-filter-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  border-bottom: 1px solid rgba(129, 135, 185, 0.25);
  padding-bottom: 24px;
}

.insights-filter-btn {
  font-family: var(--font-mono);
  font-size: var(--text-label-caps-size);
  font-weight: 600;
  letter-spacing: var(--text-label-caps-ls);
  text-transform: uppercase;
  padding: 8px 18px;
  min-height: 40px;
  border: 1px solid rgba(129, 135, 185, 0.3);
  border-radius: var(--radius);
  background-color: var(--color-surface);
  color: var(--color-on-surface-variant);
  transition: all 0.2s ease;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.insights-filter-btn:hover {
  background-color: var(--color-surface-container-high);
  border-color: var(--color-secondary);
  color: var(--color-primary);
}

.insights-filter-btn.is-active {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-off-white);
}

.insights-filter-btn:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

/* ── 4. Featured Insight Section (Optional) ───────────────── */
.insights-featured {
  margin-bottom: 80px;
  position: relative;
  width: 100%;
  height: 560px;
  border: 1px solid rgba(129, 135, 185, 0.3);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--color-charcoal);
}

.insights-featured:empty {
  display: none;
  margin: 0;
  padding: 0;
  border: none;
}

.insights-featured__image-wrap {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.insights-featured__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.85;
  filter: grayscale(70%) contrast(1.05);
  transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1), filter 0.7s ease;
}

.insights-featured:hover .insights-featured__image {
  filter: grayscale(0%) contrast(1.02);
  transform: scale(1.03);
}

.insights-featured__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(18, 20, 23, 0.95) 0%,
    rgba(18, 20, 23, 0.5) 50%,
    transparent 100%
  );
  pointer-events: none;
  z-index: 2;
}

.insights-featured__content {
  position: absolute;
  bottom: 0;
  left: 0;
  padding: 48px;
  max-width: 840px;
  z-index: 3;
}

.insights-featured__meta {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: var(--text-spec-data-size);
}

.insights-featured__badge {
  background-color: var(--color-primary);
  color: var(--color-off-white);
  padding: 4px 12px;
  border-radius: var(--radius);
  text-transform: uppercase;
  font-weight: 600;
  font-size: 11px;
  letter-spacing: 0.05em;
  border: 1px solid rgba(129, 135, 185, 0.3);
}

.insights-featured__date {
  color: var(--color-surface-container);
  font-size: 12px;
}

.insights-featured__title {
  font-family: var(--font-primary);
  font-size: var(--text-headline-lg-size);
  font-weight: 700;
  line-height: var(--text-headline-lg-lh);
  color: var(--color-off-white);
  margin: 0 0 16px 0;
  text-transform: uppercase;
}

.insights-featured__desc {
  font-family: var(--font-primary);
  font-size: var(--text-body-md-size);
  line-height: var(--text-body-md-lh);
  color: var(--color-surface-container);
  margin: 0 0 24px 0;
  max-width: 680px;
}

.insights-featured__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-primary);
  font-size: var(--text-label-caps-size);
  font-weight: 700;
  letter-spacing: var(--text-label-caps-ls);
  text-transform: uppercase;
  color: var(--color-off-white);
  text-decoration: none;
  transition: color 0.2s ease, transform 0.2s ease;
}

.insights-featured__link:hover {
  color: var(--color-secondary-container);
  transform: translateX(4px);
}

.insights-featured__link .material-symbols-outlined {
  font-size: 18px;
}

/* ── 5. Technical Archive Grid ────────────────────────────── */
.insights-archive {
  margin-bottom: 96px;
}

.insights-archive:empty {
  display: none;
  margin: 0;
  padding: 0;
  border: none;
}

.insights-archive__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(129, 135, 185, 0.3);
}

.insights-archive__title {
  font-family: var(--font-primary);
  font-size: var(--text-headline-md-size);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-primary);
  margin: 0;
}

.insights-archive__nav {
  display: flex;
  gap: 8px;
}

.insights-archive__nav-btn {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(129, 135, 185, 0.3);
  border-radius: var(--radius);
  background-color: var(--color-surface);
  color: var(--color-primary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.insights-archive__nav-btn:hover {
  background-color: var(--color-surface-container-high);
  border-color: var(--color-secondary);
}

.insights-archive__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-gutter);
}

/* Resilience selectors */
.insights-archive__grid:has(> .insight-card:only-child) {
  grid-template-columns: 1fr;
}

.insights-archive__grid:has(> .insight-card:nth-child(2):last-child) {
  grid-template-columns: repeat(2, 1fr);
}

.insight-card:last-child:nth-child(odd):not(:only-child):not(:nth-child(3)) {
  grid-column: 1 / -1;
}

/* ── 6. Insight Reusable Card ─────────────────────────────── */
.insight-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface);
  border: 1px solid rgba(129, 135, 185, 0.3);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  text-decoration: none;
  color: inherit;
  position: relative;
}

.insight-card:hover {
  border-color: var(--color-secondary);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0, 6, 34, 0.06);
}

.insight-card__image-wrap {
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background-color: var(--color-charcoal);
  position: relative;
}

.insight-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: grayscale(60%) brightness(0.9);
  transition: transform 0.4s ease, filter 0.4s ease;
}

.insight-card:hover .insight-card__image {
  filter: grayscale(0%) brightness(1);
  transform: scale(1.04);
}

.insight-card__body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
  justify-content: space-between;
}

.insight-card__meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: var(--text-spec-data-size);
}

.insight-card__category {
  color: var(--color-secondary);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.05em;
}

.insight-card__date {
  color: var(--color-outline);
  font-size: 11px;
}

.insight-card__title {
  font-family: var(--font-primary);
  font-size: var(--text-headline-md-size);
  font-weight: 700;
  line-height: var(--text-headline-md-lh);
  color: var(--color-primary);
  margin: 0 0 12px 0;
  text-transform: uppercase;
  transition: color 0.2s ease;
}

.insight-card:hover .insight-card__title {
  color: var(--color-secondary);
}

.insight-card__excerpt {
  font-family: var(--font-primary);
  font-size: var(--text-body-md-size);
  line-height: var(--text-body-md-lh);
  color: var(--color-on-surface-variant);
  margin: 0 0 20px 0;
  flex-grow: 1;
}

.insight-card__footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(129, 135, 185, 0.2);
  padding-top: 14px;
  font-family: var(--font-mono);
  font-size: var(--text-spec-data-size);
}

.insight-card__author {
  color: var(--color-outline);
  font-size: 11px;
}

.insight-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-primary);
  font-size: var(--text-label-caps-size);
  font-weight: 700;
  letter-spacing: var(--text-label-caps-ls);
  text-transform: uppercase;
  color: var(--color-primary);
  transition: color 0.2s ease, transform 0.2s ease;
}

.insight-card:hover .insight-card__link {
  color: var(--color-secondary);
  transform: translateX(2px);
}

.insight-card__link .material-symbols-outlined {
  font-size: 16px;
}

/* ── 7. Pagination / Load More ────────────────────────────── */
.insights-pagination {
  display: flex;
  justify-content: center;
  margin-top: 48px;
}

/* ── 8. Neutral Empty State ───────────────────────────────── */
.insights-empty-state {
  padding: 64px 32px;
  text-align: center;
  border: 1px dashed rgba(129, 135, 185, 0.4);
  border-radius: var(--radius);
  background-color: var(--color-surface);
  margin: 32px 0;
}

.insights-empty-state:empty {
  display: none;
}

.insights-archive__grid:not(:empty) ~ .insights-empty-state {
  display: none;
}

.insights-empty-state__icon {
  font-size: 48px;
  color: var(--color-outline);
  margin-bottom: 16px;
  display: inline-block;
}

.insights-empty-state__text {
  font-family: var(--font-primary);
  font-size: var(--text-body-lg-size);
  color: var(--color-on-surface-variant);
  max-width: 540px;
  margin: 0 auto;
}

/* ── 9. Bottom CTA Section (Stitch Source) ─────────────────── */
.insights-cta {
  background-color: var(--color-charcoal);
  color: var(--color-off-white);
  padding: 80px 0;
  border-top: 1px solid rgba(129, 135, 185, 0.3);
}

.insights-cta__inner {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  gap: 48px;
}

.insights-cta__content {
  max-width: 680px;
}

.insights-cta__title {
  font-family: var(--font-primary);
  font-size: var(--text-headline-lg-size);
  font-weight: 700;
  line-height: var(--text-headline-lg-lh);
  letter-spacing: var(--text-headline-lg-ls);
  color: var(--color-off-white);
  margin: 0 0 16px 0;
  text-transform: uppercase;
}

.insights-cta__desc {
  font-family: var(--font-primary);
  font-size: var(--text-body-lg-size);
  font-weight: var(--text-body-lg-weight);
  line-height: var(--text-body-lg-lh);
  color: var(--color-surface-container);
  margin: 0;
}

.insights-cta__actions {
  display: flex;
  gap: 16px;
  flex-shrink: 0;
}

/* ── 10. Responsive Breakpoints ───────────────────────────── */

/* Tablet Landscape (1024px) */
@media (max-width: 1024px) {
  .insights-container {
    padding-left: var(--space-margin-tablet);
    padding-right: var(--space-margin-tablet);
  }

  .insights-hero {
    padding-top: 100px;
    padding-bottom: 40px;
  }

  .insights-hero__title {
    font-size: 52px;
  }

  .insights-featured {
    height: 480px;
    margin-bottom: 64px;
  }

  .insights-featured__content {
    padding: 36px;
  }

  .insights-archive__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .insights-cta__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 32px;
  }

  .insights-cta__actions {
    width: 100%;
  }

  .insights-cta__actions .btn {
    flex: 1;
    justify-content: center;
  }
}

/* Tablet Portrait & Mobile (<= 768px) */
@media (max-width: 768px) {
  .insights-container {
    padding-left: var(--space-margin-mobile);
    padding-right: var(--space-margin-mobile);
  }

  .insights-hero {
    padding-top: 80px;
    padding-bottom: 32px;
  }

  .insights-hero__content {
    grid-column: span 12;
  }

  .insights-hero__title {
    font-size: 38px;
    line-height: 1.15;
  }

  .insights-hero__desc {
    font-size: var(--text-body-md-size);
  }

  .insights-filter-bar {
    gap: 8px;
    padding-bottom: 16px;
    margin-bottom: 32px;
  }

  .insights-featured {
    height: auto;
    min-height: 420px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    margin-bottom: 48px;
  }

  .insights-featured__content {
    position: relative;
    padding: 28px 20px;
  }

  .insights-featured__title {
    font-size: var(--text-headline-md-size);
    line-height: var(--text-headline-md-lh);
  }

  .insights-archive {
    margin-bottom: 64px;
  }

  .insights-archive__grid {
    display: flex;
    flex-direction: column;
    gap: 24px;
  }

  .insights-cta {
    padding: 64px 0;
  }

  .insights-cta__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 28px;
  }

  .insights-cta__actions {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }

  .insights-cta__actions .btn {
    width: 100%;
    justify-content: center;
  }
}

/* Small Mobile (<= 390px) */
@media (max-width: 390px) {
  .insights-container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .insights-hero__title {
    font-size: 32px;
  }

  .insights-featured__content {
    padding: 24px 16px;
  }

  .insight-card__body {
    padding: 20px 16px;
  }

  .insights-filter-btn {
    padding: 6px 14px;
    font-size: 11px;
  }
}