/* case studies: builds on ../styles.css tokens */

.case {
  --case: var(--accent);
  --case-soft: var(--accent-soft);
  --stage: #1a1b19;
  --stage-fg: #e9e8e1;
  --stage-rule: #2f302d;
}

.case.fatigue {
  --case: #c8433b;
  --case-soft: #f6e4e1;
}

.case.obsidian {
  --case: #6a4fd6;
  --case-soft: #ebe6fb;
}

@media (prefers-color-scheme: dark) {
  .case {
    --stage: #0d0e0c;
    --stage-rule: #262724;
  }

  .case.fatigue {
    --case: #f08178;
    --case-soft: #2f1d1b;
  }

  .case.obsidian {
    --case: #a593f7;
    --case-soft: #221d36;
  }
}

.case .toc a.current {
  color: var(--fg);
}

.case .runhead a {
  color: var(--muted);
  text-decoration: none;
}

.case .runhead a:hover {
  color: var(--fg);
}

/* hero */

.hero {
  padding: 1rem 0 3rem;
}

.kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.9rem;
  margin: 0 0 1.25rem;
  font: 500 0.78rem/1.4 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.kicker .dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--case);
  box-shadow: 0 0 0 4px var(--case-soft);
}

.kicker b {
  font-weight: 600;
  color: var(--case);
}

.hero h1 {
  max-width: 44rem;
  font-size: clamp(2.25rem, 5.5vw, 3.6rem);
  line-height: 1.04;
  letter-spacing: -0.035em;
}

.hero h1 em {
  font-style: normal;
  color: var(--case);
}

.hero .lede {
  max-width: 38rem;
  margin: 1.25rem 0 0;
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--soft);
}

.facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
  margin: 2.5rem 0 0;
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--rule);
}

.facts dt {
  margin-bottom: 0.3rem;
  font: 400 0.75rem/1.4 var(--mono);
  color: var(--muted);
}

.facts dd {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.5;
}

.facts a::after {
  content: " ↗";
}

/* the dark showcase panel */

.stage {
  position: relative;
  margin: 0 0 1rem;
  padding: 2.5rem 1.5rem;
  border-radius: 10px;
  background:
    radial-gradient(ellipse 60% 70% at 50% 100%, color-mix(in srgb, var(--case) 28%, transparent), transparent 70%),
    linear-gradient(var(--stage-rule) 1px, transparent 1px) 0 0 / 100% 2rem,
    linear-gradient(90deg, var(--stage-rule) 1px, transparent 1px) 0 0 / 2rem 100%,
    var(--stage);
  color: var(--stage-fg);
  overflow: hidden;
}

.stage img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
}

.stage-caption {
  margin: 0 0 3rem;
  font: 400 0.78rem/1.5 var(--mono);
  color: var(--muted);
}

/* stats strip */

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 0 0 3rem;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}

.stats div {
  padding: 1.4rem 1rem 1.3rem 0;
}

.stats div + div {
  padding-left: 1.25rem;
  border-left: 1px solid var(--rule);
}

.stats b {
  display: block;
  font: 600 2.2rem/1 var(--sans);
  letter-spacing: -0.03em;
  color: var(--fg);
}

.stats b small {
  font-size: 0.55em;
  color: var(--case);
  margin-left: 0.05em;
}

.stats span {
  display: block;
  margin-top: 0.5rem;
  font: 400 0.78rem/1.4 var(--mono);
  color: var(--muted);
}

/* chapters reuse .sec; numbered label */

.stats + .sec {
  border-top: 0;
  padding-top: 0.5rem;
}

.case .sec > h2 {
  color: var(--case);
}

.case .sec > h2 span {
  display: block;
  color: var(--muted);
  font-weight: 400;
}

.case .prose p,
.case .prose ul > li {
  max-width: 38rem;
  color: var(--soft);
}

.case .prose h3 {
  margin: 2rem 0 0.5rem;
  font: 600 1.1rem/1.4 var(--sans);
  color: var(--fg);
}

.case .prose h3:first-child {
  margin-top: 0;
}

.case .prose ul {
  margin: 0 0 1rem;
  padding: 0;
  list-style: none;
}

.case .prose ul > li {
  position: relative;
  padding-left: 1.1rem;
  margin-bottom: 0.4rem;
}

.case .prose ul > li::before {
  content: "–";
  position: absolute;
  left: 0;
  color: var(--muted);
}

.pull {
  margin: 1.75rem 0;
  padding: 0.2rem 0 0.2rem 1.25rem;
  border-left: 3px solid var(--case);
  font: 500 1.3rem/1.45 var(--sans);
  letter-spacing: -0.01em;
  color: var(--fg);
  max-width: 36rem;
}

/* decision cards */

.cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.5rem 0 0;
}

.card {
  padding: 1.1rem 1.2rem 1.15rem;
  border: 1px solid var(--rule);
  border-radius: 8px;
  background: color-mix(in srgb, var(--code-bg) 45%, transparent);
}

.card h4 {
  margin: 0 0 0.4rem;
  font: 600 0.98rem/1.4 var(--sans);
  color: var(--fg);
}

.card h4::before {
  content: attr(data-n);
  margin-right: 0.55rem;
  font: 500 0.75rem/1 var(--mono);
  color: var(--case);
}

.card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--soft);
}

/* svg diagrams: theme-aware via classes */

.diagram {
  margin: 1.75rem 0 0.5rem;
}

.diagram svg {
  display: block;
  width: 100%;
  height: auto;
  font-family: var(--mono);
}

.diagram .box {
  fill: var(--bg);
  stroke: var(--rule);
  stroke-width: 1.25;
}

.diagram .box.hl {
  fill: var(--case-soft);
  stroke: var(--case);
}

.diagram .group {
  fill: none;
  stroke: var(--rule);
  stroke-dasharray: 4 4;
}

.diagram .t {
  fill: var(--fg);
  font-size: 13px;
  font-weight: 500;
}

.diagram .s {
  fill: var(--muted);
  font-size: 11px;
}

.diagram .g {
  fill: var(--muted);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.diagram .wire {
  fill: none;
  stroke: var(--muted);
  stroke-width: 1.25;
  marker-end: url(#arrow);
}

.diagram .wire.hl {
  stroke: var(--case);
}

.diagram marker path {
  fill: var(--muted);
}

.diagram-caption {
  font: 400 0.78rem/1.5 var(--mono);
  color: var(--muted);
}

/* release timeline */

.timeline {
  position: relative;
  margin: 1.75rem 0 0.5rem;
  padding: 0 0 0 1.5rem;
  list-style: none;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0.3rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 1px;
  background: var(--rule);
}

.timeline li {
  position: relative;
  padding: 0 0 1.1rem;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -1.5rem;
  top: 0.45rem;
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--case);
}

.timeline li.minor::before {
  border-color: var(--rule);
  width: 0.5rem;
  height: 0.5rem;
  left: -1.43rem;
  top: 0.52rem;
}

.timeline .ver {
  font: 500 0.8rem/1.4 var(--mono);
  color: var(--case);
}

.timeline .date {
  margin-left: 0.6rem;
  font: 400 0.75rem/1.4 var(--mono);
  color: var(--muted);
}

.timeline p {
  margin: 0.15rem 0 0;
  font-size: 0.93rem;
  color: var(--soft);
}

/* fake terminal / code panel inside stage */

.term {
  max-width: 34rem;
  margin: 0 auto;
  border: 1px solid var(--stage-rule);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.35);
  font: 400 0.82rem/1.75 var(--mono);
  box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.7);
}

.term .bar {
  display: flex;
  gap: 0.4rem;
  padding: 0.65rem 0.8rem;
  border-bottom: 1px solid var(--stage-rule);
}

.term .bar i {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--stage-rule);
}

.term pre {
  margin: 0;
  padding: 0.9rem 1.1rem 1.1rem;
  white-space: pre-wrap;
  color: var(--stage-fg);
}

.term .c {
  color: #7d7c74;
}

.term .ok {
  color: #8cc79c;
}

.term .k {
  color: color-mix(in srgb, var(--case) 55%, #fff);
}

/* the vault mock for xournalpp */

.vault {
  display: grid;
  grid-template-columns: 13rem minmax(0, 1fr);
  max-width: 44rem;
  margin: 0 auto;
  border: 1px solid var(--stage-rule);
  border-radius: 8px;
  background: #22231f;
  overflow: hidden;
  font: 400 0.8rem/1.5 var(--mono);
  box-shadow: 0 40px 80px -40px rgba(0, 0, 0, 0.8);
}

.vault .files {
  padding: 0.9rem 0.6rem;
  border-right: 1px solid var(--stage-rule);
  background: #1c1d1a;
  color: #a9a8a0;
}

.vault .files div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.vault .files .dir {
  color: #d7d6ce;
}

.vault .files .on {
  background: #2c2e29;
  color: #f0efe8;
}

.vault .files .xpp {
  font-size: 0.65rem;
  padding: 0.05rem 0.3rem;
  border-radius: 3px;
  background: color-mix(in srgb, var(--case) 30%, transparent);
  color: #d6cdfc;
}

.vault .doc {
  padding: 1.25rem 1.5rem 1.5rem;
  color: #d7d6ce;
}

.vault .doc h5 {
  margin: 0 0 0.75rem;
  font: 600 1.05rem/1.3 var(--sans);
  color: #f0efe8;
}

.vault .page {
  position: relative;
  border-radius: 4px;
  background: #fbfaf5;
  padding: 0.75rem;
}

.vault .page svg {
  display: block;
  width: 100%;
  height: auto;
}

.vault .edit {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  background: #6a4fd6;
  color: #fff;
  font-size: 0.7rem;
}

/* next case */

.next-case {
  display: grid;
  grid-template-columns: 9rem minmax(0, 1fr);
  column-gap: 2rem;
  padding: 2.25rem 0;
  border-top: 1px solid var(--rule);
  color: var(--fg);
  text-decoration: none;
}

.next-case .label {
  font: 600 0.8rem/1.6 var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.next-case strong {
  display: block;
  font: 600 1.6rem/1.2 var(--sans);
  letter-spacing: -0.02em;
}

.next-case span.sub {
  color: var(--muted);
}

.next-case .arrow {
  display: inline-block;
  transition: transform 0.15s ease;
  color: var(--accent);
}

.next-case:hover .arrow {
  transform: translateX(4px);
}

@media (max-width: 760px) {
  .facts,
  .stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stats div:nth-child(3) {
    padding-left: 0;
    border-left: 0;
  }

  .stats div:nth-child(n + 3) {
    border-top: 1px solid var(--rule);
  }

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

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

  .vault .files {
    border-right: 0;
    border-bottom: 1px solid var(--stage-rule);
  }

  .next-case {
    grid-template-columns: minmax(0, 1fr);
    row-gap: 0.5rem;
  }
}

@media (max-width: 640px) {
  .stage {
    padding: 1.5rem 1rem;
  }

  .stats b {
    font-size: 1.8rem;
  }
}

.cards + .pull {
  margin-top: 2.25rem;
}

.stats b span {
  display: inline;
  margin: 0;
  font: inherit;
  color: inherit;
}

.case main a:not(.next-case) {
  color: var(--case);
}