/* ============================================================
   SARAH-JANE CROWSON — PORTFOLIO DESIGN SYSTEM
   Shared tokens, type scale, and base components.
   Built once against the Magic Lantern case study;
   every other page draws from this file rather than
   re-deciding colour, type, or spacing from scratch.
   ============================================================ */

:root {
  /* ---- Colour: landing / botanical register ---- */
  --cream:        #F5EFE4;
  --magenta:      #7B1750;  /* silk lining, the Botanica sewing box — site-wide accent */
  --mauve-pink:   #C4A0A8;
  --sage:         #8A9A7E;
  --olive:        #6B7654;
  --navy:         #1C2B3A;  /* primary body text on cream */
  --warm-grey:    #9B8E82;

  /* ---- Colour: nocturnal register (Magic Lantern departure) ---- */
  --near-black:   #15110E;
  --deep-warm-grey: #2A211A; /* image sections sit here, not pure black, so slides glow as in projection */
  --slide-gold:   #C99A4B;
  --slide-amber:  #E8B978;

  /* ---- Type families ---- */
  --font-display: 'Cormorant Garamond', 'EB Garamond', Georgia, serif;
  --font-body:    'EB Garamond', Georgia, serif;
  --font-sans:    'Inter', -apple-system, sans-serif;

  /* ---- Type scale ---- */
  --text-xs:   0.8rem;
  --text-sm:   0.95rem;
  --text-base: 1.125rem;
  --text-md:   1.4rem;
  --text-lg:   1.9rem;
  --text-xl:   2.8rem;
  --text-2xl:  4rem;
  --text-3xl:  5.5rem;

  /* ---- Spacing ---- */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.75rem;
  --space-4: 3rem;
  --space-5: 5rem;
  --space-6: 8rem;
  --space-7: 12rem;

  /* ---- Layout ---- */
  --measure: 38rem;       /* comfortable reading width for body prose */
  --measure-wide: 56rem;
  --radius-slide: 4px;
}

/* ---- Reset ---- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--cream);
  color: var(--navy);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.15;
  margin: 0;
}

p { margin: 0 0 1.2em 0; }
p:last-child { margin-bottom: 0; }

/* ---- Reduced motion: respected site-wide ---- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---- Focus states: visible everywhere, styled to fit the register ---- */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--slide-gold);
  outline-offset: 3px;
}

/* ============================================================
   SHARED NAVIGATION
   ============================================================ */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
 align-items: baseline;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  mix-blend-mode: difference;
  color: #F5EFE4;
  pointer-events: none;
}
.site-nav a { pointer-events: auto; }
.site-nav__name { font-family: var(--font-display); font-size: var(--text-md); text-transform: none; letter-spacing: 0.01em; }
.site-nav__links { display: flex; gap: var(--space-3); }
.site-nav__links a { text-decoration: none; opacity: 0.85; transition: opacity 0.2s ease; }
.site-nav__links a:hover { opacity: 1; }

/* ---- Site-wide maker's mark: a quiet colophon after the page's own
   closing register, consistent across the public portfolio. ---- */
.site-colophon {
  padding: var(--space-3);
  background: var(--cream);
  color: var(--warm-grey);
  border-top: 1px solid rgba(28, 43, 58, 0.08);
  text-align: center;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
}
.site-colophon p { margin: 0; }

/* ============================================================
   GHOST BOTANICAL / FOSSIL SUBSTRATE LAYER
   Present across pages, quietened on case study pages.
   ============================================================ */
.ghost-substrate {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.05;
  mix-blend-mode: overlay;
  z-index: 1;
}
.ghost-substrate--quiet { opacity: 0.035; }

/* ============================================================
   CASE STUDY SCAFFOLDING — shared by Botanica / Magic Lantern / Card Game
   Each page sets its own --page-ground and --page-ink per its register.
   ============================================================ */
.cs-section {
  position: relative;
  padding: var(--space-6) var(--space-3);
}
.cs-section--image {
  background: var(--page-ground, var(--deep-warm-grey));
  color: var(--page-ink, var(--cream));
  padding: var(--space-6) var(--space-2);
}
.cs-section--text {
  background: var(--cream);
  color: var(--navy);
}
.cs-inner {
  max-width: var(--measure);
  margin: 0 auto;
}
.cs-inner--wide { max-width: var(--measure-wide); }

.cs-eyebrow {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--magenta);
  margin-bottom: var(--space-2);
  display: block;
}

.cs-subheading {
  font-size: var(--text-md);
  color: var(--olive);
  margin: var(--space-4) 0 var(--space-2);
}
.qm-heading + .cs-subheading { margin-top: var(--space-3); }

.cs-hinge {
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-style: italic;
  color: var(--olive);
  margin-top: var(--space-4);
}

.cs-placeholder-note {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  color: var(--magenta);
  background: rgba(123, 23, 80, 0.06);
  border-left: 2px solid var(--magenta);
  padding: var(--space-1) var(--space-2);
  margin-top: var(--space-2);
  font-style: italic;
}

/* Slide figure wrapper: handles both mounted-artefact and full-bleed projection images */
.slide-figure {
  position: relative;
  margin: 0 auto var(--space-3) auto;
}
.slide-figure img {
  width: 100%;
  border-radius: var(--radius-slide);
}
.slide-figure--mounted img {
  box-shadow: 0 1.5rem 4rem rgba(0,0,0,0.5);
}
.slide-figure--projection img {
  border-radius: 0;
}
.slide-caption {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-sm);
  color: var(--warm-grey);
  text-align: center;
  margin-top: var(--space-1);
  letter-spacing: 0.02em;
}

/* ============================================================
   PROJECTION OVERLAY EFFECT
   A slide image enters large and "projected" — pinned centre-screen
   while the page scrolls past it — then shrinks as it scrolls,
   and releases into the normal text flow as a small, settled,
   documented photograph. Reusable across case studies.
   ============================================================ */
.proj-block { position: relative; margin: var(--space-4) 0; }
.proj-runway {
  height: 300vh;
  position: relative;
}
.proj-sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  pointer-events: none;
}
/* The base layer: the same image, fixed in size, low opacity — the trace
   that stays put while the foreground layer moves through it. The palimpsest. */
.proj-base-img {
  position: absolute;
  inset: 0;
  margin: auto;
  max-width: 24rem;
  max-height: 56vh;
  width: auto;
  height: auto;
  opacity: 0.14;
  filter: grayscale(20%);
  border-radius: var(--radius-slide);
  z-index: 1;
}
/* The foreground layer: begins oversized and out of focus, as if projected
   across a building from a distance, then scales down and sharpens as the
   reader scrolls — settling into the same scale as the base layer beneath it. */
.proj-sticky__img {
  position: relative;
  z-index: 2;
  max-width: min(640px, 90vw);
  max-height: 72vh;
  width: auto;
  border-radius: var(--radius-slide);
  box-shadow: 0 2rem 6rem rgba(0,0,0,0.55);
  will-change: transform, filter;
  transform: scale(2);
  filter: blur(26px);
}
.proj-caption {
  text-align: center;
  margin-top: calc(var(--space-2) * -1);
}

@media (prefers-reduced-motion: reduce) {
  .proj-runway { height: auto !important; }
  .proj-sticky {
    position: relative !important;
    height: auto !important;
    padding: var(--space-3) 0;
  }
  .proj-base-img { display: none !important; }
  .proj-sticky__img {
    max-width: min(640px, 90vw) !important;
    max-height: none !important;
    transform: none !important;
    filter: none !important;
    margin: 0 auto;
  }
}

/* On the dark/nocturnal sections specifically, dark-toned source images can
   visually vanish into a near-black ground once blurred and scaled up.
   Strengthen the ghost layer and add a faint warm glow behind it so there's
   always something perceptible to track during the unfocused phase. */
.ml-sequence .proj-base-img {
  opacity: 0.4;
  filter: grayscale(0%) brightness(1.2);
}
.ml-sequence .proj-sticky::after {
  content: "";
  position: absolute;
  inset: -15%;
  background: radial-gradient(circle at center, rgba(201, 154, 75, 0.14), transparent 62%);
  pointer-events: none;
  z-index: 0;
}

/* ============================================================
   HORIZONTAL IMAGE GRID — a specimen-board layout for several
   static images shown side by side rather than stacked vertically.
   ============================================================ */
.ml-grid {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-3);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2);
  align-items: start;
}
.ml-grid__item {
  display: flex;
  flex-direction: column;
}
.ml-grid__item img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 2px;
  border: 1px solid rgba(245, 239, 228, 0.18);
  box-shadow: 0 1rem 2.5rem rgba(0,0,0,0.5);
}
.ml-grid__item figcaption { margin-top: var(--space-1); text-align: center; }
.ml-grid__item .ml-slide__caption-title { font-size: 0.62rem; }
.ml-grid__item .slide-caption { font-size: 0.78rem; min-height: 2.4em; }

@media (max-width: 900px) {
  .ml-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 540px) {
  .ml-grid { grid-template-columns: 1fr; }
}

/* Utility: fade-in-on-scroll, applied via JS by adding .is-visible */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 1s ease, transform 1s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   TEXT PALIMPSEST — a single line of text arriving out of focus
   and resolving as the reader scrolls, over a short runway.
   The typographic sibling of the projection overlay effect.
   Used AT MOST ONCE per page. Line colour set per page via
   --text-focus-color (defaults to slide amber for dark grounds).
   ============================================================ */
.text-focus__runway {
  height: 150vh;
  position: relative;
}
.text-focus__sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 var(--space-3);
}
.text-focus__line {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.4rem, 3.4vw, 2.4rem);
  line-height: 1.5;
  text-align: center;
  max-width: var(--measure);
  color: var(--text-focus-color, var(--slide-amber));
  will-change: filter, opacity, letter-spacing;
  filter: blur(14px);
  opacity: 0.35;
  letter-spacing: 0.06em;
}
@media (prefers-reduced-motion: reduce) {
  .text-focus__runway { height: auto; padding: var(--space-5) 0; }
  .text-focus__sticky { position: relative; height: auto; }
  .text-focus__line { filter: none !important; opacity: 1 !important; letter-spacing: 0.02em !important; }
}
.site-footer {
  padding: var(--space-3);
  border-top: 1px solid rgba(155, 142, 130, 0.25);
  color: var(--warm-grey);
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-align: center;
}

.site-footer p {
  margin: 0;
}