/* ==========================================================================
   ItForks — case-study system (loaded after ../../styles.css)
   1. Header       4. Story blocks     7. Interactive modules
   2. Hero         5. Figures          8. Next project, CTA, footer
   3. Snapshot     6. Phone frame      9. Project themes + responsive
   ========================================================================== */

/* 0. Shared foundations ------------------------------------------------------
   The case studies run on more than one homepage branch, so the spacing scale and
   helpers they depend on live here too (identical values, so they never conflict). */
:root {
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
}
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.js [data-hero-root] [data-hero="line"], .js [data-hero-root] [data-hero="fade"] { opacity: 0; }
@media (prefers-reduced-motion: reduce) {
  .js [data-hero-root] [data-hero="line"], .js [data-hero-root] [data-hero="fade"] { opacity: 1; }
}

/* 1. Header ------------------------------------------------------------------ */
.case-header .site-header__inner { gap: var(--space-6); }
.case-back { margin-left: auto; display: inline-flex; align-items: center; gap: var(--space-2); font-size: 0.9375rem; font-weight: 500; }
.case-back span { transition: transform var(--dur-fast) var(--ease-out); }
.case-back:hover span { transform: translateX(-4px); }

/* 2. Hero -------------------------------------------------------------------- */
.case-hero { position: relative; overflow: clip; background: var(--bg); color: var(--fg); padding-top: calc(var(--nav-h) + clamp(64px, 9vw, 144px)); padding-bottom: var(--section-y); }
.case-kicker { font-size: var(--fs-meta); font-weight: 500; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); margin-bottom: var(--space-6); }
.case-kicker span { color: var(--accent); }
.case-title { font-size: clamp(3.5rem, 1rem + 10vw, 11rem); line-height: 0.86; letter-spacing: -0.06em; }
.case-lede { max-width: 26em; margin-top: var(--space-6); font-size: var(--fs-lead); color: var(--muted); }
.case-live { display: inline-flex; margin-top: var(--space-6); }
.case-hero__media { margin-top: clamp(64px, 8vw, 128px); }
.case-frame { position: relative; overflow: hidden; border-radius: var(--radius); background: var(--color-graphite); }
.case-frame > img { width: 100%; height: auto; }
.section--tight { padding-block: clamp(56px, 7vw, 112px); }
.case-caption { margin-top: var(--space-4); font-size: var(--fs-meta); letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }

/* 3. Snapshot ---------------------------------------------------------------- */
.snapshot { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-7) var(--space-6); border-top: 1px solid var(--line); padding-top: var(--space-6); }
.snapshot dt { margin-bottom: var(--space-3); font-size: var(--fs-meta); font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.snapshot dd { margin: 0; font-family: var(--font-display); font-size: 1.125rem; font-weight: 500; letter-spacing: -0.01em; line-height: 1.45; }
.snapshot dd a { text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 0.2em; }

/* 4. Story blocks ------------------------------------------------------------ */
.case-split { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(48px, 7vw, 120px); align-items: end; }
.case-statement { font-size: clamp(2.25rem, 1rem + 4.2vw, 5.25rem); }
.case-body { max-width: 30em; font-size: var(--fs-lead); color: var(--muted); }
.case-body + .case-body { margin-top: var(--space-5); }

.approach { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-7) clamp(32px, 4vw, 64px); margin-top: clamp(56px, 7vw, 112px); }
.approach li { display: grid; gap: var(--space-3); align-content: start; padding-top: var(--space-5); border-top: 1px solid var(--line); }
.approach__num { font-family: var(--font-display); font-size: var(--fs-small); color: var(--accent); }
.approach h3 { font-family: var(--font-display); font-size: clamp(1.375rem, 1.1rem + 0.8vw, 1.875rem); font-weight: 600; letter-spacing: -0.025em; line-height: 1.15; }
.approach p { color: var(--muted); max-width: 24em; }
.approach code, .case-panel code { font-family: var(--font-mono); font-size: 0.85em; }

.delivered { display: grid; gap: 0; margin-top: var(--space-7); border-top: 1px solid var(--line); }
.delivered li { display: flex; gap: var(--space-4); align-items: baseline; padding-block: var(--space-4); border-bottom: 1px solid var(--line); font-size: 1.0625rem; }
.delivered li::before { content: ""; flex-shrink: 0; width: 9px; height: 9px; background: var(--color-mint); transform: translateY(-1px); }

/* 5. Figures ----------------------------------------------------------------- */
.case-figure { margin-top: clamp(56px, 7vw, 112px); }
.case-figure + .case-figure { margin-top: clamp(80px, 10vw, 160px); }
.case-figure--narrow { width: min(78%, 980px); margin-left: auto; }
.figure-cols--phones { padding-inline: 6.67%; text-align: center; }
.text-link { color: var(--fg); text-decoration: underline; text-decoration-color: var(--accent); text-underline-offset: 0.2em; }
.figure-cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: var(--space-4); padding-left: 3.33%; font-size: var(--fs-meta); letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }

/* 6. Phone frame (HTML) ------------------------------------------------------ */
.phone {
  width: min(100%, 300px); aspect-ratio: 9 / 18.5; margin-inline: auto;
  padding: 14px; border-radius: 34px; background: var(--color-obsidian);
  border: 1px solid var(--line-dark); box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.6);
}
.phone__screen {
  display: flex; flex-direction: column; gap: var(--space-3); height: 100%; overflow: hidden;
  padding: 26px 16px 16px; border-radius: 24px; background: var(--color-graphite); color: var(--color-ivory);
  font-size: 0.8125rem; line-height: 1.45;
}
.phone__label { font-size: 0.6875rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-muted-graphite); }
.phone__sender { margin-bottom: 4px; font-size: 0.6875rem; font-weight: 600; letter-spacing: 0.08em; color: var(--color-mint); }
.phone__card { padding: 12px; border-radius: 10px; background: var(--color-obsidian); border: 1px solid var(--line-dark); }
.phone__card--mint { background: var(--color-mint); color: var(--color-obsidian); border-color: transparent; }
.phone__row { display: flex; justify-content: space-between; gap: var(--space-3); padding: 8px 0; border-bottom: 1px solid var(--line-dark); }
.phone__row:last-child { border-bottom: 0; }
.phone__row span:first-child { color: var(--text-muted-graphite); }
.phone__bar { height: 6px; border-radius: 3px; background: var(--line-dark); overflow: hidden; }
.phone__bar i { display: block; height: 100%; background: var(--color-mint); }

/* 7. Interactive modules (shared tab behaviour lives in js/case.js) --------- */
.case-interactive__head { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: var(--space-5); margin-bottom: clamp(48px, 6vw, 88px); }
.case-hint { font-size: var(--fs-small); color: var(--muted); }
[role="tab"] { font: inherit; color: inherit; cursor: pointer; }
.case-panel p { color: var(--muted); }
.case-panel h3 { font-family: var(--font-display); font-weight: 600; font-size: clamp(1.375rem, 1.1rem + 0.8vw, 1.875rem); letter-spacing: -0.025em; margin-bottom: var(--space-3); }
.case-note { margin-top: var(--space-6); font-size: var(--fs-meta); letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }

/* 7a. Pipeline (Clipperzz) */
.pipeline__map { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(24px, 4vw, 64px); position: relative; }
.pipeline__map::before { content: ""; position: absolute; left: 8%; right: 8%; top: 50%; height: 1px; background: var(--line); }
.node {
  position: relative; display: grid; gap: var(--space-2); padding: var(--space-5);
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius);
  transition: border-color 0.4s var(--ease-out), background-color 0.4s var(--ease-out);
}
.node__k { font-size: var(--fs-meta); letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.node strong { font-family: var(--font-display); font-size: 1.375rem; font-weight: 600; letter-spacing: -0.02em; }
.node small { color: var(--muted); font-size: var(--fs-small); }
.node.is-lit { border-color: var(--color-mint); background: color-mix(in srgb, var(--color-mint) 8%, var(--bg)); }
.node.is-lit .node__k { color: var(--color-mint); }
.pipeline__steps { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: clamp(40px, 5vw, 72px); border-bottom: 1px solid var(--line); }
.pipeline__steps [role="tab"] {
  position: relative; padding: var(--space-4) var(--space-4) var(--space-4) 0; margin-right: var(--space-5);
  background: none; border: 0; font-family: var(--font-display); font-size: 1.125rem; font-weight: 500; color: var(--muted);
  transition: color var(--dur-fast) var(--ease-out);
}
.pipeline__steps [role="tab"] span { margin-right: var(--space-2); font-size: var(--fs-small); color: var(--accent); }
.pipeline__steps [role="tab"]::after { content: ""; position: absolute; left: 0; right: var(--space-4); bottom: -1px; height: 2px; background: var(--color-mint); transform: scaleX(0); transform-origin: left; transition: transform 0.4s var(--ease-out); }
.pipeline__steps [role="tab"][aria-selected="true"] { color: var(--fg); }
.pipeline__steps [role="tab"][aria-selected="true"]::after { transform: scaleX(1); }
.pipeline__panels { margin-top: var(--space-6); max-width: 40em; min-height: 6.5em; }
.pipeline__panels .case-panel + .case-panel { margin-top: var(--space-5); }
.is-enhanced .pipeline__panels .case-panel + .case-panel { margin-top: 0; }

/* 7b. Architecture explorer (Civic Sense) */
.arch { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(40px, 6vw, 96px); align-items: start; }
.arch__map { display: grid; gap: clamp(40px, 5vw, 64px); }
.arch__row { position: relative; display: grid; gap: var(--space-4); }
.arch__row--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.arch__row--1 { grid-template-columns: minmax(0, 1fr); width: min(100%, 360px); margin-inline: auto; }
.arch__row + .arch__row::before { content: ""; position: absolute; left: 50%; top: calc(-1 * clamp(40px, 5vw, 64px)); height: clamp(40px, 5vw, 64px); width: 1px; background: var(--line); }
.arch__node {
  display: grid; gap: 4px; justify-items: start; text-align: left;
  padding: var(--space-4) var(--space-4); border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg);
  transition: border-color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out);
}
.arch__node strong { font-family: var(--font-display); font-size: 1.0625rem; font-weight: 600; letter-spacing: -0.015em; }
.arch__node small { font-size: var(--fs-meta); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.arch__node:hover { border-color: var(--fg); }
.arch__node[aria-selected="true"] { border-color: var(--color-obsidian); background: var(--color-mint); color: var(--color-obsidian); }
.arch__node[aria-selected="true"] small { color: var(--color-obsidian); }
.arch__node.is-lit:not([aria-selected="true"]) { border-color: var(--mint-deep); box-shadow: inset 0 0 0 1px var(--mint-deep); }
.arch__panels .case-panel + .case-panel { margin-top: var(--space-7); }
.is-enhanced .arch__panels .case-panel + .case-panel { margin-top: 0; }
.arch__panels .tags-line { margin-top: var(--space-4); font-size: var(--fs-small); color: var(--fg); }

/* 7c. Annotated layout (The Founders Archive) */
.hotspots { display: grid; grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); gap: clamp(40px, 5vw, 80px); align-items: start; }
.hotspots__figure { position: relative; }
.hotspot {
  position: absolute; display: grid; place-items: center; width: 40px; height: 40px; margin: -20px 0 0 -20px;
  border-radius: 50%; border: 1.5px solid var(--color-obsidian); background: var(--color-ivory); color: var(--color-obsidian);
  font-family: var(--font-display); font-size: 0.875rem; font-weight: 600;
  box-shadow: 0 0 0 6px color-mix(in srgb, var(--color-ivory) 60%, transparent);
  transition: background-color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.hotspot:hover { transform: scale(1.08); }
.hotspot[aria-selected="true"] { background: var(--color-mint); }
.hotspots__panels .case-panel { padding-top: var(--space-5); border-top: 1px solid var(--line); }
.hotspots__panels .case-panel + .case-panel { margin-top: var(--space-6); }
.is-enhanced .hotspots__panels .case-panel + .case-panel { margin-top: 0; }
.hotspots__panels .case-panel span { display: block; margin-bottom: var(--space-2); font-family: var(--font-display); font-size: var(--fs-small); color: var(--accent); }

/* 7d. SMS walkthrough (Finotify) */
.walk { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: clamp(40px, 6vw, 96px); align-items: center; }
.walk__steps { display: grid; border-top: 1px solid var(--line); }
.walk__steps [role="tab"] {
  display: grid; grid-template-columns: 40px minmax(0, 1fr); gap: var(--space-3); align-items: baseline; text-align: left;
  padding: var(--space-5) 0; background: none; border: 0; border-bottom: 1px solid var(--line); color: var(--muted);
  transition: color var(--dur-fast) var(--ease-out);
}
.walk__steps [role="tab"] .walk__num { font-family: var(--font-display); font-size: var(--fs-small); color: var(--accent); }
.walk__steps [role="tab"] strong { display: block; font-family: var(--font-display); font-size: 1.25rem; font-weight: 600; letter-spacing: -0.02em; color: inherit; }
.walk__steps [role="tab"] em { display: block; margin-top: 4px; font-style: normal; font-size: 0.9375rem; }
.walk__steps [role="tab"][aria-selected="true"] { color: var(--fg); }
.walk__panels .case-panel + .case-panel { margin-top: var(--space-7); }
.is-enhanced .walk__panels .case-panel + .case-panel { margin-top: 0; }

/* 8. Next project, CTA, footer --------------------------------------------- */
.case-next { display: block; padding-block: var(--section-y); background: var(--bg); color: var(--fg); }
.case-next__link { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(40px, 6vw, 96px); align-items: center; }
.case-next__label { font-size: var(--fs-meta); font-weight: 500; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); }
.case-next__title { display: block; margin-top: var(--space-5); font-family: var(--font-display); font-weight: 600; text-transform: uppercase; font-size: clamp(2.75rem, 1rem + 6vw, 7rem); line-height: 0.88; letter-spacing: -0.055em; }
.case-next__desc { display: block; margin-top: var(--space-4); color: var(--muted); }
.case-next__arrow { display: block; width: clamp(96px, 12vw, 180px); height: auto; margin-top: var(--space-7); overflow: visible; transition: transform 0.6s var(--ease-out); }
.case-next__media { transition: transform 0.9s var(--ease-out); }
.case-next__link:hover .case-next__arrow { transform: translate(14px, -14px); }
.case-next__link:hover .case-next__media { transform: scale(0.985); }
.case-next__link:focus-visible { outline-offset: 12px; }
.case-next .arrow__fill { fill: var(--color-mint); }
.case-next .arrow__stroke { fill: none; stroke: var(--fg); stroke-width: 3; stroke-linejoin: miter; }

.case-cta { padding-block: var(--section-y); background: var(--bg); color: var(--fg); text-align: center; }
.case-cta__title { font-family: var(--font-display); font-weight: 600; font-size: clamp(2rem, 1rem + 3.4vw, 4rem); letter-spacing: -0.04em; line-height: 1; text-transform: uppercase; }
.case-cta__title .serif { font-size: 1.1em; }
.case-cta .btn { margin-top: var(--space-7); }

.case-footer { padding-block: var(--space-7); background: var(--bg); color: var(--fg); border-top: 1px solid var(--line); }
.case-footer .shell { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-4) var(--space-6); font-size: var(--fs-small); color: var(--muted); }
.case-footer a:hover { color: var(--color-mint); }

/* 9. Project themes ---------------------------------------------------------- */
/* Clipperzz — cinematic, dark, film-strip edges */
.case--clipperzz .case-hero__media .case-frame::before,
.case--clipperzz .case-hero__media .case-frame::after {
  content: ""; position: absolute; left: 0; right: 0; height: 14px; z-index: 1;
  background: repeating-linear-gradient(90deg, var(--color-obsidian) 0 14px, transparent 14px 34px);
  opacity: 0.85;
}
.case--clipperzz .case-hero__media .case-frame::before { top: 10px; }
.case--clipperzz .case-hero__media .case-frame::after { bottom: 10px; }

/* The Founders Archive — editorial, light, magazine rhythm */
.case--founders .case-hero__grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(40px, 6vw, 96px); align-items: end; }
.case--founders .case-hero__media { margin-top: 0; }
.case--founders .case-title { font-size: clamp(3rem, 1rem + 6.4vw, 8rem); }
.case--founders .case-title .serif { display: block; font-size: 1.1em; }
.case--founders .approach { grid-template-columns: 1fr; gap: 0; max-width: 980px; }
.case--founders .approach li { grid-template-columns: clamp(64px, 10vw, 140px) minmax(0, 1fr) minmax(0, 1fr); align-items: baseline; padding-block: var(--space-6); }
.case--founders .approach__num { font-family: var(--font-serif); font-style: italic; font-size: clamp(2.5rem, 1.5rem + 3vw, 4.5rem); line-height: 1; color: var(--fg); }

/* Civic Sense — map grid, pins */
.case--civic .case-hero {
  background-image:
    linear-gradient(var(--line-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-light) 1px, transparent 1px);
  background-size: 56px 56px;
}
.case--civic .approach li { position: relative; padding-left: 28px; }
.case--civic .approach li::before {
  content: ""; position: absolute; left: 0; top: calc(var(--space-5) + 4px); width: 14px; height: 14px;
  border-radius: 50% 50% 50% 0; transform: rotate(-45deg); background: var(--color-obsidian);
  box-shadow: inset 0 0 0 4px var(--color-obsidian), inset 0 0 0 7px var(--color-mint);
}

/* Finotify — graphite, phone-first, centred */
.case--finotify .case-hero { --bg: var(--color-graphite); text-align: center; }
.case--finotify .case-hero, .case--finotify .case-interactive { --muted: var(--text-muted-graphite); } /* Steel is ~4.4:1 on Graphite; this is ~6.4:1 */
.case--finotify .case-hero .shell > * { margin-inline: auto; }
.case--finotify .walk__panels .phone { width: min(100%, 320px); }
.case--finotify .case-interactive { --bg: var(--color-graphite); }

@media (max-width: 1100px) {
  .snapshot { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .case-split, .arch, .hotspots, .walk, .case-next__link { grid-template-columns: 1fr; }
  .case--founders .case-hero__grid { grid-template-columns: 1fr; }
  .case--founders .case-hero__media { margin-top: clamp(48px, 7vw, 96px); }
}
@media (max-width: 900px) {
  .approach { grid-template-columns: 1fr; }
  .case--founders .approach li { grid-template-columns: 64px minmax(0, 1fr); }
  .case--founders .approach li p { grid-column: 2; }
  .pipeline__map { grid-template-columns: 1fr; gap: var(--space-4); }
  .pipeline__map::before { left: 50%; right: auto; top: 0; bottom: 0; width: 1px; height: auto; }
  .case-figure--narrow { width: 100%; }
  .case-back { font-size: 0; }
  .case-back span { font-size: 1.25rem; }
}
@media (max-width: 640px) {
  .snapshot { grid-template-columns: 1fr; }
  .arch__row--3 { grid-template-columns: 1fr; }
  .arch__row + .arch__row::before { display: none; }
  .case-header .btn { display: none; }
  .hotspot { width: 32px; height: 32px; margin: -16px 0 0 -16px; font-size: 0.75rem; }
}