/* Spectrum case study — single, consolidated stylesheet */

.spectrum-study,
.spectrum-study *,
.spectrum-study *::before,
.spectrum-study *::after {
  box-sizing: border-box;
}

html {
  overflow-x: clip;
}

.spectrum-study {
  --spectrum-sans: "Creato Display", sans-serif;
  --spectrum-serif: "Libre Baskerville", Georgia, serif;
  --spectrum-blue: #0f2ddb;
  --spectrum-navy: #101b43;
  --spectrum-ink: #17191f;
  --spectrum-muted: #666b78;
  --spectrum-paper: #f7f7f5;
  --spectrum-line: #e2e3e7;
  --spectrum-pale: #eef1ff;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;
  --space-8: 128px;

  --text-max: none;
  --container-max: 1120px;
  --sidebar-width: 220px;
  --section-pad: var(--space-7);
  --title-lines: 3;

  overflow-x: clip;
  margin: 0;
  background-color: var(--spectrum-paper);
  color: var(--spectrum-ink);
  font-family: var(--spectrum-sans);
  font-synthesis: none;
}

/* ---------- Page grid + sidebar ---------- */

.spectrum-study .case-layout,
.spectrum-study .case-layout.is-nav-collapsed {
  display: grid;
  width: 100%;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  align-items: start;
  gap: var(--space-5);
  margin: 0;
  padding: var(--space-3) var(--space-6) 0;
}

.spectrum-study .case-layout.is-nav-collapsed {
  grid-template-columns: minmax(0, 1fr);
}

.spectrum-study .case-content {
  width: 100%;
  max-width: none;
  min-width: 0;
}

.spectrum-container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: 0;
}

.spectrum-study .case-sidebar {
  position: sticky;
  z-index: 3;
  top: 90px;
  align-self: start;
  max-height: calc(100vh - 110px);
  padding: 16px 14px;
  overflow: auto;
  border: 1px solid var(--spectrum-line);
  border-radius: 10px;
  background: var(--spectrum-paper);
}

.spectrum-study .case-sidebar-top {
  justify-content: space-between;
  margin-bottom: 12px;
}

.spectrum-study .all-work {
  justify-content: flex-start;
  padding-inline: 8px;
  color: #555b68;
}

.spectrum-study .all-work:hover,
.spectrum-study .toc-toggle:hover {
  background: var(--spectrum-pale);
  color: var(--spectrum-blue);
}

.spectrum-study .detail-toc {
  gap: 3px;
}

.spectrum-study .detail-toc a {
  padding: 9px 10px;
  border-left: 2px solid transparent;
  border-radius: 4px;
  color: #555b68;
  font-size: 13px;
  line-height: 1.4;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

.spectrum-study .detail-toc a:hover,
.spectrum-study .detail-toc a[aria-current="location"] {
  border-left-color: var(--spectrum-blue);
  background: var(--spectrum-pale);
  color: var(--spectrum-blue);
}

.spectrum-study .case-layout.is-nav-collapsed .case-sidebar {
  position: fixed;
  z-index: 12;
  top: 90px;
  left: 12px;
  width: 58px;
  max-height: none;
  padding: 8px;
  overflow: visible;
  box-shadow: 0 8px 24px rgb(23 25 31 / 10%);
}

.spectrum-study .case-layout.is-nav-collapsed .case-sidebar-top {
  flex-direction: column;
  align-items: center;
}

.spectrum-study .case-layout.is-nav-collapsed .all-work {
  min-width: 40px;
  padding: 0;
}

.spectrum-study .case-layout.is-nav-collapsed .all-work-label {
  display: none;
}

.spectrum-study :focus-visible {
  outline: 3px solid var(--spectrum-blue);
  outline-offset: 4px;
}

/* ---------- Shared type ---------- */

.spectrum-eyebrow,
.spectrum-section-no,
.spectrum-kicker {
  margin: 0;
  color: var(--spectrum-blue);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.15em;
  line-height: 1.5;
  text-transform: uppercase;
}

.spectrum-study h1,
.spectrum-study h2,
.spectrum-study h3,
.spectrum-study h4 {
  margin: 0;
  color: var(--spectrum-ink);
  font-family: var(--spectrum-serif) !important;
  font-weight: 400;
  line-height: 1.1;
}

.spectrum-study h2 {
  font-size: clamp(36px, 4.5vw, 56px);
  letter-spacing: -0.035em;
}

.spectrum-study h3 {
  font-size: clamp(27px, 3vw, 38px);
  letter-spacing: -0.03em;
}

.spectrum-section p,
.spectrum-section li {
  margin: 0;
  color: #555b68;
  font-size: 16px;
  line-height: 1.65;
}

.spectrum-section p.spectrum-section-no,
.spectrum-section p.spectrum-kicker {
  color: var(--spectrum-blue);
  font-size: 11px;
  line-height: 1.5;
}

.spectrum-dark-section p.spectrum-section-no {
  color: #fff;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- Hero ---------- */

.spectrum-hero {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  padding-top: var(--space-3);
}

.spectrum-hero-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  align-items: center;
  gap: 40px;
}

.spectrum-hero-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: var(--space-3);
}

.spectrum-hero h1 {
  font-size: clamp(44px, 4vw, 68px);
  letter-spacing: -0.055em;
  line-height: 0.98;
}

.spectrum-hero-description {
  margin: 0;
  color: #555b68;
  font-size: 17px;
  line-height: 1.65;
}

.spectrum-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.spectrum-hero-stat + .spectrum-hero-stat {
  padding-left: var(--space-3);
  border-left: 1px solid var(--spectrum-line);
}

.spectrum-hero-stat strong {
  display: block;
  color: var(--spectrum-blue);
  font-size: clamp(36px, 3.6vw, 64px);
  font-weight: 600;
  letter-spacing: -0.05em;
  line-height: 1;
}

.spectrum-hero-stat > span {
  display: block;
  margin-top: var(--space-1);
  color: #555b68;
  font-size: 14px;
  line-height: 1.4;
}

.spectrum-hero-media {
  display: flex;
  min-width: 0;
  align-items: center;
  margin: 0;
}

.spectrum-hero-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: contain;
}

.spectrum-meta {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-3);
  margin: 0;
  padding: var(--space-3) 0 0;
  border-top: 1px solid var(--spectrum-line);
}

.spectrum-meta > div {
  min-width: 0;
}

.spectrum-meta dt {
  margin-bottom: 5px;
  color: #666b78;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.spectrum-meta dd {
  margin: 0;
  color: var(--spectrum-ink);
  font-size: 14px;
  line-height: 1.55;
}

/* ---------- Sections: one vertical stack, padding only ---------- */

.spectrum-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin: 0;
  padding: var(--section-pad) 0 0;
  scroll-margin-top: 100px;
}

.spectrum-section:last-of-type {
  padding-bottom: var(--section-pad);
}

.spectrum-section-head {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
}

.spectrum-section-head h2 {
  max-width: none;
}

/* Text blocks use the shared reading width; media and cards span the container */
.spectrum-section > p,
.spectrum-panel > p {
  max-width: none;
}

/* Intro text → next block is 48px (24px flex gap + 24px) */
.spectrum-section > :is(.spectrum-approach-grid, .spectrum-decision-list, .spectrum-result-stats, .spectrum-opportunity-grid),
.spectrum-panel > .spectrum-journey {
  margin-top: var(--space-3);
}

/* ---------- 02 The challenge ---------- */

.spectrum-dark-section .spectrum-panel {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-6);
  border-radius: 32px;
  background-color: var(--spectrum-navy);
  background-image: radial-gradient(circle, rgb(255 255 255 / 22%) 1px, transparent 1.2px);
  background-size: 24px 24px;
  color: #fff;
}

.spectrum-dark-section .spectrum-section-no,
.spectrum-dark-section h2 {
  color: #fff;
}

.spectrum-dark-section p,
.spectrum-dark-section li {
  color: #e4e8f4;
}

.spectrum-journey {
  display: grid;
  width: 100%;
  gap: var(--space-2);
}

.spectrum-journey-row {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr) 48px minmax(0, 1fr);
  align-items: center;
  gap: var(--space-2);
  color: #fff;
  font-size: 14px;
  text-align: left;
}

.spectrum-journey-label {
  color: #b7c4f4;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.spectrum-journey-row > span:nth-child(2),
.spectrum-journey-old,
.spectrum-journey-new {
  display: flex;
  height: 56px;
  align-items: center;
  padding-inline: 20px;
  border: 1px solid #44517c;
  border-radius: 12px;
  background: #1b2b5b;
  color: #fff;
  line-height: 1.3;
  text-align: left;
}

.spectrum-journey-new {
  border-color: #dce3ff;
  background: #dce3ff;
  color: #182550;
  font-weight: 500;
}

.spectrum-journey-arrow {
  color: #aebbff;
  font-size: 22px;
  text-align: center;
}

.spectrum-challenge-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
  width: 100%;
  margin: var(--space-3) 0 0;
  padding: 0;
  list-style: none;
}

.spectrum-challenge-points li {
  padding-top: var(--space-2);
  border-top: 1px solid rgb(255 255 255 / 20%);
  font-size: 14px;
}

.spectrum-challenge-opportunity {
  width: 100%;
  max-width: none !important;
  margin-top: var(--space-3) !important;
  padding-top: var(--space-4);
  border-top: 1px solid rgb(255 255 255 / 20%);
}

.spectrum-challenge-opportunity strong {
  display: block;
  margin-bottom: var(--space-1);
  color: #fff;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.spectrum-challenge-opportunity {
  font-size: 16px;
}

/* ---------- 03 Approach + 06 What's next cards ---------- */

.spectrum-approach-grid,
.spectrum-opportunity-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
  gap: var(--space-4);
}

.spectrum-approach-card,
.spectrum-opportunity-card {
  min-width: 0;
  border: 1px solid var(--spectrum-line);
  background: transparent;
}

.spectrum-approach-card summary,
.spectrum-opportunity-card summary {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-4);
  cursor: pointer;
  list-style: none;
}

.spectrum-approach-card summary::-webkit-details-marker,
.spectrum-opportunity-card summary::-webkit-details-marker {
  display: none;
}

.spectrum-approach-card[open] summary,
.spectrum-opportunity-card[open] summary {
  border-bottom: 1px solid var(--spectrum-line);
  background: #fff;
}

.spectrum-approach-number,
.spectrum-opportunity-phase {
  color: var(--spectrum-blue);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
}

.spectrum-approach-title,
.spectrum-opportunity-title {
  min-height: calc(1.15em * var(--title-lines));
  padding-right: var(--space-3);
  color: var(--spectrum-ink);
  font-family: var(--spectrum-serif);
  font-size: 24px;
  line-height: 1.15;
}

.spectrum-approach-summary,
.spectrum-opportunity-summary {
  color: #626775;
  font-size: 14px;
  line-height: 1.65;
}

.spectrum-proposed-tag {
  display: inline-flex;
  width: fit-content;
  padding: 5px 8px;
  border: 1px solid var(--spectrum-blue);
  border-radius: 999px;
  color: var(--spectrum-blue);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.06em;
  line-height: 1.4;
  text-transform: uppercase;
}

.spectrum-disclosure-icon {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 21px;
  height: 21px;
  border: 1px solid #c9cbd2;
  border-radius: 50%;
}

.spectrum-disclosure-icon::before,
.spectrum-disclosure-icon::after {
  position: absolute;
  top: 9px;
  left: 5px;
  width: 9px;
  height: 1px;
  background: var(--spectrum-ink);
  content: "";
}

.spectrum-disclosure-icon::after {
  transform: rotate(90deg);
  transition: transform 250ms ease-out;
}

details[open] > summary .spectrum-disclosure-icon::after {
  transform: rotate(0);
}

.spectrum-approach-card > ul,
.spectrum-opportunity-details > ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin: 0;
  padding: 0 0 0 var(--space-3);
}

.spectrum-approach-card > ul {
  padding: var(--space-4) var(--space-4) var(--space-4) calc(var(--space-4) + var(--space-3));
}

.spectrum-approach-card li,
.spectrum-opportunity-details li {
  font-size: 14px;
}

.spectrum-opportunity-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-4);
}

.spectrum-opportunity-details > p {
  font-size: 14px;
}

.spectrum-opportunity-preview {
  --panel-height: 220px;
  margin-top: auto;
}

.spectrum-opportunity-supporting-images {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.spectrum-learn-page-images {
  grid-template-columns: minmax(0, 1fr);
}

.spectrum-opportunity-supporting-images figure,
.spectrum-opportunity-expanded-image {
  min-width: 0;
  margin: 0;
}

.spectrum-opportunity-research {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-block: var(--space-3);
  border-block: 1px solid var(--spectrum-line);
}

.spectrum-opportunity-research strong {
  color: var(--spectrum-blue);
  font-size: 42px;
  letter-spacing: -0.07em;
  line-height: 1;
}

.spectrum-opportunity-research p {
  font-size: 13px;
}

.spectrum-learn-page-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin: 0;
  padding-left: var(--space-3);
}

/* ---------- Image panels (one style) ---------- */

.spectrum-image-panel {
  --panel-height: 440px;
  display: flex;
  height: var(--panel-height);
  min-width: 0;
  align-items: center;
  justify-content: center;
  margin: 0;
  padding: 0;
  overflow: hidden;
  border: 0;
  background: transparent;
}

.spectrum-image-panel img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}

figcaption {
  margin-top: var(--space-2);
  color: var(--spectrum-muted);
  font-size: 12px;
  line-height: 1.55;
}

/* ---------- 04 Key design decisions ---------- */

.spectrum-decision-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-7);
}

.spectrum-decision {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  align-items: center;
  gap: var(--space-6);
}

.spectrum-decision-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: var(--space-3);
}

.spectrum-decision-copy h4 {
  margin-top: 0;
  font-family: var(--spectrum-sans) !important;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.5;
  text-transform: uppercase;
}

/* Heading + paragraph pairs read as one block (24px between blocks) */
.spectrum-decision-copy h4 + p {
  margin-top: calc(var(--space-1) - var(--space-3));
}

.spectrum-decision-copy p:not(.spectrum-kicker) {
  font-size: 15px;
}

.spectrum-decision-figure {
  min-width: 0;
  margin: 0;
}

.spectrum-decision-figure .spectrum-image-panel {
  height: auto;
}

.spectrum-decision-figure .spectrum-image-panel img {
  height: auto;
  max-height: 520px;
}

.spectrum-decision-figure figcaption {
  margin-top: var(--space-1);
}

/* ---------- 05 Outcomes ---------- */

.spectrum-result-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.spectrum-stat-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  border: 1px solid var(--spectrum-line);
  border-radius: 12px;
  background: #fff;
}

.spectrum-stat-card strong {
  color: var(--spectrum-blue);
  font-size: clamp(54px, 6.5vw, 78px);
  font-weight: 600;
  letter-spacing: -0.075em;
  line-height: 1;
}

.spectrum-stat-card p {
  font-size: 14px;
}

/* ---------- 07 Reflection ---------- */

.spectrum-reflection-close {
  color: var(--spectrum-ink) !important;
  font-family: var(--spectrum-serif);
  font-size: 22px !important;
  line-height: 1.45 !important;
}

/* ---------- Footer area ---------- */

.spectrum-study .case-pagination {
  margin-top: 0;
}

.spectrum-study .site-footer {
  margin-top: 55px;
}

/* ---------- Expand/collapse animation ---------- */

@supports selector(details::details-content) {
  .spectrum-approach-card::details-content,
  .spectrum-opportunity-card::details-content {
    block-size: 0;
    overflow: clip;
    transition: block-size 320ms ease-out, content-visibility 320ms allow-discrete;
  }

  .spectrum-approach-card[open]::details-content,
  .spectrum-opportunity-card[open]::details-content {
    block-size: auto;
  }
}

/* ---------- Responsive ---------- */

@media (max-width: 1360px) {
  .spectrum-study {
    --title-lines: 4;
  }
}

@media (max-width: 1100px) {
  .spectrum-study {
    --section-pad: 72px;
    --title-lines: 1;
  }

  .spectrum-study .case-layout,
  .spectrum-study .case-layout.is-nav-collapsed {
    display: block;
    padding: 0 var(--space-3);
  }

  .spectrum-study .case-layout .case-sidebar,
  .spectrum-study .case-layout.is-nav-collapsed .case-sidebar {
    position: sticky;
    z-index: 8;
    top: 64px;
    left: auto;
    width: auto;
    max-height: none;
    margin: 0 calc(-1 * var(--space-3)) var(--space-3);
    padding: 10px var(--space-3);
    overflow-x: auto;
    border-width: 0 0 1px;
    border-radius: 0;
    box-shadow: none;
  }

  .spectrum-study .case-layout .case-sidebar-top,
  .spectrum-study .case-layout.is-nav-collapsed .case-sidebar-top {
    flex-direction: row;
    align-items: center;
  }

  .spectrum-study .case-layout .detail-toc {
    display: flex;
    flex-direction: row;
    gap: 4px;
    overflow-x: auto;
  }

  .spectrum-study .case-layout.is-nav-collapsed .all-work-label {
    display: inline;
  }

  .spectrum-hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .spectrum-hero h1 {
    font-size: clamp(44px, 9vw, 72px);
  }

  .spectrum-hero-stat strong {
    font-size: clamp(40px, 7vw, 64px);
  }

  .spectrum-meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .spectrum-approach-grid,
  .spectrum-opportunity-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .spectrum-decision {
    grid-template-columns: minmax(0, 1fr);
  }

  .spectrum-decision-figure {
    order: -1;
  }

  .spectrum-opportunity-preview {
    margin-top: 0;
  }
}

@media (max-width: 640px) {
  .spectrum-study {
    --section-pad: 56px;
  }

  .spectrum-dark-section .spectrum-panel {
    padding: var(--space-4);
  }

  .spectrum-journey-row {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-1);
  }

  .spectrum-journey-arrow {
    text-align: left;
    transform: rotate(90deg);
    transform-origin: 12px 50%;
  }

  .spectrum-journey-row > span:nth-child(2),
  .spectrum-journey-old,
  .spectrum-journey-new {
    width: 100%;
  }

  .spectrum-challenge-points,
  .spectrum-result-stats,
  .spectrum-opportunity-supporting-images {
    grid-template-columns: minmax(0, 1fr);
  }

  .spectrum-hero-stats {
    flex-direction: column;
  }

  .spectrum-hero-stat + .spectrum-hero-stat {
    padding: var(--space-2) 0 0;
    border-top: 1px solid var(--spectrum-line);
    border-left: 0;
  }

  .spectrum-image-panel {
    --panel-height: 280px;
  }

  .spectrum-approach-card summary,
  .spectrum-opportunity-card summary,
  .spectrum-opportunity-details {
    padding: var(--space-3);
  }

  .spectrum-disclosure-icon {
    top: var(--space-3);
    right: var(--space-3);
  }

  .spectrum-opportunity-preview {
    --panel-height: 220px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html:has(body.spectrum-study) {
    scroll-behavior: auto;
  }

  .spectrum-study .detail-toc a,
  .spectrum-disclosure-icon::after,
  .spectrum-approach-card::details-content,
  .spectrum-opportunity-card::details-content {
    transition: none;
  }
}

/* ---------- My contribution ---------- */
.spectrum-contribution { padding-top: var(--space-6); }
.spectrum-contribution h2 {
  margin: 0 0 var(--space-3);
  font-family: var(--spectrum-serif);
  font-weight: 400;
  font-size: clamp(1.6rem, 2.4vw, 2.1rem);
  line-height: 1.2;
}
.spectrum-contribution p,
.spectrum-contribution li {
  margin: 0 0 var(--space-2);
  font-family: var(--spectrum-sans);
  color: #555b68;
  font-size: 16px;
  line-height: 1.65;
}
.spectrum-contribution ul { margin: 0 0 var(--space-3); padding-left: 1.25em; }