/* =====================================================================
   StarStarter — Long-form Case Study
   case-study-narrative.css

   Builds on design-system/colors_and_type.css. This file owns the
   long-form reading experience: typography, drop caps, section
   rhythm, marginalia, pull quotes, floating chapter nav.

   Deliberate type deviation: chapter prose is set in Lora 400 (not
   Quicksand). Long-form serif reads materially better at length;
   Quicksand stays in eyebrows, meta, and UI chrome.
   ===================================================================== */

/* ---------- page chrome ---------- */
body {
  background: var(--bg);
  color: var(--color-text);
  overflow-x: hidden;
}

/* Static, lightweight nebula — radial gradients + CSS star sprinkle.
   Hooks into her live WebGL shader on the real site by swapping this
   block for <NebulaBackground /> later. */
.bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 60% 40% at 14% 10%, rgba(230,121,182,0.10), transparent 70%),
    radial-gradient(ellipse 50% 40% at 86% 22%, rgba(20,184,166,0.06), transparent 70%),
    radial-gradient(ellipse 70% 50% at 50% 60%, rgba(167,139,250,0.10), transparent 70%),
    radial-gradient(ellipse 60% 50% at 18% 88%, rgba(230,121,182,0.06), transparent 70%),
    var(--bg);
}
.bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 6% 12%, var(--purple-pale), transparent),
    radial-gradient(1.5px 1.5px at 22% 4%, var(--cream), transparent),
    radial-gradient(1px 1px at 38% 18%, var(--purple-mid), transparent),
    radial-gradient(1px 1px at 51% 7%, var(--purple-pale), transparent),
    radial-gradient(1.5px 1.5px at 68% 14%, var(--cream), transparent),
    radial-gradient(1px 1px at 82% 5%, var(--purple-mid), transparent),
    radial-gradient(1px 1px at 96% 22%, var(--purple-pale), transparent),
    radial-gradient(1px 1px at 12% 38%, var(--purple-pale), transparent),
    radial-gradient(1.5px 1.5px at 30% 46%, var(--cream), transparent),
    radial-gradient(1px 1px at 54% 32%, var(--purple-mid), transparent),
    radial-gradient(1px 1px at 73% 41%, var(--purple-pale), transparent),
    radial-gradient(1px 1px at 91% 55%, var(--cream), transparent),
    radial-gradient(1.5px 1.5px at 8% 62%, var(--cream), transparent),
    radial-gradient(1px 1px at 26% 71%, var(--purple-mid), transparent),
    radial-gradient(1px 1px at 44% 86%, var(--purple-pale), transparent),
    radial-gradient(1px 1px at 62% 78%, var(--cream), transparent),
    radial-gradient(1px 1px at 79% 91%, var(--purple-mid), transparent),
    radial-gradient(1px 1px at 95% 84%, var(--purple-pale), transparent);
  opacity: 0.85;
  animation: twinkle 6s ease-in-out infinite alternate;
}
@keyframes twinkle {
  0% { opacity: 0.55; }
  100% { opacity: 0.9; }
}

main, header.nav, footer.site {
  position: relative;
  z-index: 1;
}

/* ---------- progress bar ---------- */
.progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: transparent;
  z-index: 10;
}
.progress .fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--nebula-pink), var(--purple-bright), var(--nebula-teal));
  box-shadow: 0 0 16px rgba(167,139,250,0.7);
  transition: width 80ms linear;
}

/* ---------- top nav ---------- */
header.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 56px;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-glass);
  position: sticky;
  top: 0;
  z-index: 8;
}
header.nav .logo {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--cream);
  text-shadow: 0 2px 16px rgba(140,80,255,0.5);
}
header.nav .links {
  display: flex;
  gap: 28px;
}
header.nav .links a {
  font-family: var(--font-ui);
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--purple-mid);
  font-weight: 500;
  cursor: pointer;
  transition: color var(--dur-fast);
}
header.nav .links a:hover { color: var(--cream); }
header.nav .links a.active { color: var(--cream); }
header.nav .back {
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--purple-dim);
  cursor: pointer;
}
header.nav .back:hover { color: var(--cream); }

/* ---------- hero ---------- */
.hero {
  padding: 96px 56px 48px;
  max-width: 980px;
  margin: 0 auto;
}
.hero .chapter-tag {
  font-family: var(--font-ui);
  font-size: 11px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--purple-dim);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 28px;
}
.hero .chapter-tag::before,
.hero .chapter-tag::after {
  content: "";
  flex: 0 0 32px;
  height: 1px;
  background: var(--border-glass);
}
.hero .chapter-tag::after { flex: 1; }

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(56px, 9vw, 104px);
  color: var(--cream);
  margin: 0 0 28px;
  line-height: 0.98;
  font-weight: 700;
  text-shadow: 0 2px 24px rgba(140,80,255,0.5);
  letter-spacing: -2px;
}

.hero .deck {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(22px, 2.5vw, 28px);
  color: var(--purple-light);
  line-height: 1.55;
  font-weight: 400;
  max-width: 820px;
  margin: 0 0 56px;
}

.hero .factrow {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 32px;
  font-family: var(--font-ui);
  border-top: 1px solid var(--border-glass);
  border-bottom: 1px solid var(--border-glass);
  padding: 20px 0;
}
.hero .factrow .fact {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.hero .factrow .k {
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--purple-dim);
  font-weight: 700;
}
.hero .factrow .v {
  font-size: 14px;
  color: var(--cream);
  font-weight: 500;
  letter-spacing: 0.5px;
}

/* ---------- hero image ---------- */
.hero-img {
  max-width: 1180px;
  margin: 0 auto 80px;
  padding: 0 56px;
}
.hero-img .frame {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border-glass);
  aspect-ratio: 16 / 7.5;
  background: var(--bg2);
  box-shadow: 0 30px 80px rgba(0,0,0,0.5), 0 0 80px rgba(167,139,250,0.12);
}
.hero-img .frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.hero-img .cap {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 13px;
  color: var(--purple-dim);
  margin-top: 14px;
  padding-left: 12px;
  border-left: 1px solid var(--border-glass);
}

/* ---------- chapter rhythm ---------- */
.chapter {
  max-width: 680px;
  margin: 0 auto;
  padding: 64px 56px;
  position: relative;
}

.chapter .num {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 17px;
  color: var(--purple-bright);
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.chapter h2 {
  font-family: var(--font-display);
  font-size: clamp(34px, 4.2vw, 48px);
  color: var(--cream);
  margin: 0 0 36px;
  font-weight: 700;
  line-height: 1.12;
  text-shadow: 0 2px 24px rgba(140,80,255,0.5);
  letter-spacing: -0.5px;
}
.chapter p {
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.75;
  color: var(--purple-light);
  margin: 0 0 22px;
  font-weight: 400;
}
.chapter p strong {
  color: var(--cream);
  font-weight: 700;
}
.chapter p em {
  color: var(--purple-pale);
  font-style: italic;
}

/* Drop cap on the first paragraph of a chapter — applied via a
   <span class="dropcap">…</span> wrapper because ::first-letter is
   easily broken by leading whitespace or a floated aside. */
.chapter .drop .dropcap {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 84px;
  line-height: 0.85;
  float: left;
  padding: 8px 14px 0 0;
  color: var(--cream);
  text-shadow: 0 2px 24px rgba(140,80,255,0.6);
}

/* Inline marginalia — a little sidenote that floats right of body copy. */
.chapter .margin-note {
  float: right;
  clear: right;
  width: 200px;
  margin: 4px -240px 16px 24px;
  padding-left: 16px;
  border-left: 1px solid var(--border-glass);
  font-family: var(--font-ui);
  font-size: 12px;
  line-height: 1.55;
  color: var(--purple-mid);
  font-style: italic;
}
.chapter .margin-note::before {
  content: "✦";
  display: block;
  color: var(--purple-bright);
  font-size: 10px;
  letter-spacing: 0;
  margin-bottom: 4px;
  font-style: normal;
}

/* Hide marginalia on narrow screens, fall through inline instead */
@media (max-width: 1100px) {
  .chapter .margin-note {
    float: none;
    width: 100%;
    margin: 20px 0 20px;
    padding: 14px 18px;
    border: 1px solid var(--border-glass);
    border-radius: 6px;
    background: var(--glass);
  }
}

/* ---------- divider ---------- */
.div-star {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 16px 0 8px;
  font-size: 14px;
  color: var(--purple-dim);
}
.div-star::before,
.div-star::after {
  content: "";
  width: 80px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-glass), transparent);
}

/* ---------- figure (image inside the read) ---------- */
.figure {
  max-width: 1080px;
  margin: 40px auto;
  padding: 0 56px;
}
.figure .frame {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-glass);
  background: var(--bg2);
}
.figure .frame img,
.figure .frame .placeholder {
  width: 100%;
  display: block;
}

/* Visual placeholder shown until a real screenshot is dropped in */
.placeholder {
  background:
    linear-gradient(135deg, rgba(167,139,250,0.10), rgba(20,184,166,0.05)),
    repeating-linear-gradient(45deg, transparent 0 24px, rgba(167,139,250,0.04) 24px 25px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 80px 32px;
  color: var(--purple-dim);
  font-family: var(--font-ui);
  text-align: center;
}
.placeholder .glyph { font-size: 20px; color: var(--purple-bright); margin-bottom: 12px; }
.placeholder .what {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 18px;
  color: var(--purple-light);
  text-transform: none;
  letter-spacing: 0;
}
.placeholder .swap {
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--purple-dim);
}
.placeholder.tall { aspect-ratio: 16 / 9; padding: 0; }
.placeholder.square { aspect-ratio: 1 / 1; padding: 0; }
.placeholder.phone { aspect-ratio: 9 / 16; padding: 0; }

.figure figcaption {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 14px;
  color: var(--purple-dim);
  margin-top: 14px;
  padding-left: 12px;
  border-left: 1px solid var(--border-glass);
  max-width: 720px;
}
.figure figcaption b {
  color: var(--purple-mid);
  font-style: normal;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-right: 8px;
}

/* Figure variants */
.figure.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.figure.three {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

/* ---------- pull quote ---------- */
.pull {
  max-width: 980px;
  margin: 64px auto;
  padding: 0 56px;
  text-align: center;
  position: relative;
}
.pull blockquote {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(28px, 3.4vw, 42px);
  line-height: 1.3;
  color: var(--cream);
  margin: 0 0 24px;
  text-shadow: 0 2px 30px rgba(140,80,255,0.5);
  font-weight: 700;
  letter-spacing: -0.5px;
}
.pull cite {
  font-style: normal;
  font-family: var(--font-ui);
  font-size: 11px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--purple-dim);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
}
.pull cite::before,
.pull cite::after {
  content: "";
  width: 40px;
  height: 1px;
  background: var(--border-glass);
}
.pull::before {
  content: "★";
  font-style: normal;
  color: var(--purple-bright);
  font-size: 20px;
  display: block;
  margin-bottom: 24px;
  text-shadow: 0 0 24px rgba(167,139,250,0.8);
}

/* ---------- floating chapter TOC ---------- */
.toc {
  position: fixed;
  top: 50%;
  right: 32px;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 16px;
  z-index: 6;
  font-family: var(--font-ui);
}
.toc a {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 10px;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--purple-dim);
  font-weight: 600;
  cursor: pointer;
  transition: color var(--dur-fast);
  text-decoration: none;
}
.toc a .tick {
  width: 16px;
  height: 1px;
  background: var(--purple-dim);
  transition: width var(--dur-base), background var(--dur-fast);
  flex-shrink: 0;
}
.toc a .tx { opacity: 0; transition: opacity var(--dur-fast); }
.toc:hover a .tx { opacity: 1; }
.toc a:hover { color: var(--cream); }
.toc a:hover .tick { background: var(--cream); }
.toc a.active { color: var(--cream); }
.toc a.active .tick { width: 28px; background: var(--purple-bright); box-shadow: 0 0 8px rgba(167,139,250,0.8); }
.toc a.active .tx { opacity: 1; }

@media (max-width: 1180px) {
  .toc { display: none; }
}

/* ---------- inline numerical highlight ---------- */
/* Used to spotlight a number inside a paragraph: "...went up <span class='hi'>60%</span>" */
.hi {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--cream);
  text-shadow: 0 2px 16px rgba(167,139,250,0.6);
}

/* ---------- credits strip (before footer) ---------- */
.credits {
  max-width: 980px;
  margin: 80px auto 0;
  padding: 56px;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
}
.credits h3 {
  font-family: var(--font-ui);
  font-size: 11px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--purple-dim);
  margin: 0 0 24px;
  font-weight: 700;
}
.credits-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 36px;
}
.credits .col h4 {
  font-family: var(--font-ui);
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--purple-bright);
  font-weight: 700;
  margin: 0 0 12px;
}
.credits .col p {
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.55;
  color: var(--purple-light);
  margin: 0;
  font-weight: 400;
}
.credits .col .small {
  font-family: var(--font-ui);
  font-size: 12px;
  color: var(--purple-mid);
  line-height: 1.6;
  margin-top: 8px;
}

/* ---------- next case study ---------- */
.next-cs {
  max-width: 1080px;
  margin: 80px auto 0;
  padding: 0 56px;
}
.next-cs a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 40px;
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  background: var(--glass);
  text-decoration: none;
  transition: border-color var(--dur-fast), transform var(--dur-fast), background var(--dur-fast);
  cursor: pointer;
}
.next-cs a:hover {
  border-color: var(--purple-dark);
  background: var(--hover-tint);
  transform: translateY(-3px);
}
.next-cs .label {
  font-family: var(--font-ui);
  font-size: 11px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--purple-dim);
  margin-bottom: 12px;
}
.next-cs .title {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 32px;
  color: var(--cream);
  text-shadow: 0 2px 24px rgba(140,80,255,0.5);
}
.next-cs .arrow {
  font-family: var(--font-display);
  font-size: 36px;
  color: var(--purple-bright);
}

/* ---------- site footer ---------- */
footer.site {
  margin-top: 96px;
  padding: 32px 56px;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-top: 1px solid var(--border-glass);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}
footer.site .socials {
  display: flex;
  gap: 24px;
  font-family: var(--font-ui);
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--purple-mid);
}
footer.site .socials a {
  color: var(--purple-mid);
  cursor: pointer;
  transition: color var(--dur-fast);
}
footer.site .socials a:hover { color: var(--cream); }
footer.site .copy {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 13px;
  color: var(--purple-dim);
}

/* Reveal-on-scroll: chapters fade up slightly when entering the viewport */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .bg::after { animation: none; }
  .progress .fill { transition: none; }
}