/* ============================================================
   Sophie Vreugde — Portfolio landing
   Black & white editorial / physical document-wallet hero
   ============================================================ */

:root {
  --bg: #0b0b0b;
  --bg-2: #141414;
  --paper: #f3f1ea;
  --paper-bright: #faf9f5;
  --paper-dim: #e7e3d8;
  --photo-bg: #fdfdfb;
  --rough-a: #efe9da; --rough-b: #e2dbc8;
  --kraft-a: #cdbe9c; --kraft-b: #bca884; --kraft-c: #ab966d;
  --kraft-pa: #b6a583; --kraft-pb: #9a875f; --kraft-pc: #80714e;
  --kraft-dog: #9c8a64;
  --note-font: "Mr De Haviland", "Mr Dafoe", cursive;
  --ink: #111111;
  --ink-soft: #5a564d;
  --accent: #111111;        /* overridden by tweak */
  --hair: rgba(17, 17, 17, 0.16);

  --font-display: "Archivo Black", "Arial Black", system-ui, sans-serif;
  --font-ui: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Space Mono", "Courier New", monospace;
  --font-hand: "Mr Dafoe", "Caveat", cursive;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--paper);
  font-family: var(--font-ui);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

/* deep vignette + faint film grid behind everything */
.stage {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(120% 90% at 50% 38%, #1b1b1b 0%, var(--bg) 62%, #050505 100%);
  overflow: hidden;
}
.stage::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(100% 80% at 50% 45%, #000 30%, transparent 80%);
  pointer-events: none;
}

/* corner chrome */
.chrome {
  position: fixed;
  z-index: 60;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: rgba(243,241,234,0.55);
  text-transform: uppercase;
  pointer-events: none;
}
.chrome--tl { top: 26px; left: 28px; }
.chrome--tr { top: 26px; right: 28px; text-align: right; }
.chrome--bl { bottom: 24px; left: 28px; }
.chrome--br { bottom: 24px; right: 28px; text-align: right; }
.chrome a { color: inherit; pointer-events: auto; text-decoration: none; border-bottom: 1px solid rgba(243,241,234,0.3); padding-bottom: 1px; }
.chrome a:hover { color: var(--paper); border-color: var(--paper); }
.blink { animation: blink 1.4s steps(2, start) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ---- scaler: folder is fixed-size, scaled to fit ---- */
.scaler {
  position: fixed;
  top: 50%;
  left: 50%;
  transform-origin: center center;
  will-change: transform;
}

/* ============================================================
   THE FOLDER
   natural design space: 860 x 1080, tabs extend +60 right
   ============================================================ */
.folder {
  position: relative;
  width: 860px;
  height: 1080px;
}

/* back cover (slightly taller, sits behind, holds the clip) */
.back {
  position: absolute;
  left: 14px; right: 6px;
  top: -34px; bottom: 30px;
  background: linear-gradient(180deg, var(--paper-dim), #d9d4c7);
  border-radius: 4px 4px 10px 10px;
  box-shadow: 0 36px 64px -28px rgba(0,0,0,0.72);
  z-index: 1;
}
.clip {
  position: absolute;
  top: -58px; left: 93px;
  width: 46px; height: 138px;
  z-index: 36;
  transform: rotate(-11deg);
  filter: drop-shadow(0 3px 3px rgba(0,0,0,0.28));
}

/* ---- work sheets ---- */
.sheets {
  position: absolute;
  inset: 0;
  z-index: 10;
  pointer-events: none;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.sheet {
  position: absolute;
  left: 50%;
  top: 6px;
  /* width / height set inline per sheet */
  background: var(--paper-bright);
  border-radius: 2px;
  box-shadow: 0 20px 38px -24px rgba(0,0,0,0.5);
  transform-origin: 50% 100%;
  /* promote each sheet to its own GPU layer so moving it is a cheap composite */
  will-change: transform;
  /* only transform animates (GPU-friendly); box-shadow/brightness now snap */
  transition: transform 0.82s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: auto;
  cursor: pointer;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.sheet.dimmed { filter: brightness(0.97); }
.sheet.lifted {
  box-shadow: 0 32px 52px -28px rgba(0,0,0,0.6);
  filter: none;
}

/* ---- sheet interior: header on top, plate fills below ---- */
.sheet__head {
  flex: 0 0 auto;
  color: var(--ink);
  padding: 20px 24px 12px;
}
.sheet__rule { display: none; }
.sheet__no {
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ink-soft);
}
.sheet__title {
  font-family: var(--font-display);
  font-size: 32px;
  line-height: 0.92;
  letter-spacing: -0.01em;
  margin: 6px 0 0;
  text-transform: uppercase;
}

.plate {
  position: relative;
  flex: 1 1 auto;
  margin: 4px 24px 24px;
  background: linear-gradient(135deg, #e4e2dc 0%, #c7c4bc 55%, #b6b3aa 100%);
  overflow: hidden;
}
.plate__mark { position: absolute; inset: 0; display: grid; place-items: center; opacity: 0.85; }
.plate__mark svg { width: 42%; height: 42%; }
.plate__photo { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
.crop { position: absolute; width: 20px; height: 20px; opacity: 0.6; }
.crop::before, .crop::after { content: ""; position: absolute; background: var(--ink); }
.crop::before { width: 1.5px; height: 100%; }
.crop::after { height: 1.5px; width: 100%; }
.crop--tl { top: 11px; left: 11px; }
.crop--tr { top: 11px; right: 11px; }
.crop--bl { bottom: 11px; left: 11px; }
.crop--br { bottom: 11px; right: 11px; }
/* anchor each bracket's two bars to its own corner so the L hugs the plate corner */
.crop--tl::before, .crop--tl::after { top: 0; left: 0; }
.crop--tr::before, .crop--tr::after { top: 0; right: 0; }
.crop--bl::before, .crop--bl::after { bottom: 0; left: 0; }
.crop--br::before, .crop--br::after { bottom: 0; right: 0; }
.plate__tag {
  position: absolute;
  bottom: 12px; left: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ink);
  background: rgba(250,249,245,0.82);
  padding: 3px 7px;
}
.plate__desc {
  position: absolute;
  bottom: 12px; right: 12px; left: 90px;
  text-align: right;
  font-size: 12px; line-height: 1.3;
  color: var(--ink);
  font-family: var(--font-ui);
}

/* huge ghost number watermarking the plate */
.ghostno {
  position: absolute;
  top: -16px; right: 6px;
  font-family: var(--font-display);
  font-size: 138px;
  line-height: 1;
  color: rgba(17,17,17,0.08);
  pointer-events: none;
}

/* ============================================================
   PAPER STOCKS — each sheet is a different material
   ============================================================ */

/* 001 · BOND — crisp bright office stock (default look) */
.paper--bond { background: var(--paper-bright); }

/* 002 · PHOTO — glossy print: thick white border, sheen, no header rule */
.paper--photo { background: var(--photo-bg); }
.paper--photo .sheet__head { padding: 18px 18px 8px; }
.paper--photo .sheet__rule { display: none; }
.paper--photo .plate { margin: 0 18px 60px; background: linear-gradient(150deg, #d2cfca 0%, #9e9b94 60%, #76736d 100%); }
.sheen {
  position: absolute; inset: 0; pointer-events: none; z-index: 3;
  /* plain white gloss (no screen blend, which re-blended every animated frame) */
  background: linear-gradient(118deg, rgba(255,255,255,0.45) 0%, rgba(255,255,255,0) 26%,
              rgba(255,255,255,0) 72%, rgba(255,255,255,0.22) 100%);
}

/* 003 · ROUGH — pronounced SERRATED (pinking) top edge, warm fibre */
.paper--rough {
  background: linear-gradient(180deg, var(--rough-a) 0%, var(--rough-b) 100%);
  clip-path: polygon(
    0 2.6%, 4% 0, 8% 2.6%, 12% 0, 16% 2.6%, 20% 0, 24% 2.6%, 28% 0, 32% 2.6%,
    36% 0, 40% 2.6%, 44% 0, 48% 2.6%, 52% 0, 56% 2.6%, 60% 0, 64% 2.6%, 68% 0,
    72% 2.6%, 76% 0, 80% 2.6%, 84% 0, 88% 2.6%, 92% 0, 96% 2.6%, 100% 0,
    100% 100%, 0 100%
  );
  box-shadow: 0 20px 38px -26px rgba(0,0,0,0.5);
}
.paper--rough .sheet__head { padding-top: 30px; }
.paper--rough .grain::after, .paper--rough.grain::after { opacity: 0.8; }

/* 004 · VELLUM — translucent tracing paper. NB: no live backdrop-filter blur
   (that re-blurred the backdrop every frame and was the main cause of jank);
   a slightly more opaque tint reads as tracing paper without the per-frame cost */
.paper--vellum {
  background: rgba(236,242,247,0.55);
  border: 1px solid rgba(255,255,255,0.5);
  box-shadow: 0 20px 44px -30px rgba(0,0,0,0.28);
}
.paper--vellum .sheet__head { color: rgba(20,28,38,0.5); }
.paper--vellum .sheet__rule { background: rgba(20,28,38,0.38); }
.paper--vellum .sheet__no { color: rgba(20,28,38,0.42); }
.paper--vellum .plate {
  background: rgba(150,160,172,0.12);
}
.paper--vellum .plate__mark { opacity: 0.26; }
.paper--vellum .plate__tag, .paper--vellum .plate__desc { color: rgba(20,28,38,0.55); background: rgba(255,255,255,0.35); }
.paper--vellum .ghostno { color: rgba(20,28,38,0.04); }

/* 005 · KRAFT — warm brown kraft card, matte & fibrous, dog-eared corner */
.paper--kraft {
  background: linear-gradient(158deg, var(--kraft-a) 0%, var(--kraft-b) 56%, var(--kraft-c) 100%);
  box-shadow: 0 22px 40px -26px rgba(0,0,0,0.58);
}
.paper--kraft .sheet__head { color: #38301f; }
.paper--kraft .sheet__rule { background: #38301f; }
.paper--kraft .sheet__no { color: #6c5d3f; }
.paper--kraft .plate { background: linear-gradient(150deg, var(--kraft-pa) 0%, var(--kraft-pb) 56%, var(--kraft-pc) 100%); }
.paper--kraft .plate__tag { color: #38301f; background: rgba(214,200,170,0.85); }
.paper--kraft .plate__desc { color: #2f2818; }
.paper--kraft .ghostno { color: rgba(56,48,31,0.13); }
.paper--kraft .grain::after, .paper--kraft.grain::after { opacity: 0.85; mix-blend-mode: multiply; }
.dogear {
  position: absolute; top: 0; right: 0; width: 56px; height: 56px; z-index: 4;
  background: linear-gradient(225deg, var(--kraft-dog) 0%, var(--kraft-b) 46%, transparent 48%);
  box-shadow: -3px 3px 6px -2px rgba(0,0,0,0.3);
  pointer-events: none;
}

/* ---- palette options (data-palette on .stage) — fresher, less yellow ---- */
.stage[data-palette="fresh"] {
  --paper:#f4f4f0; --paper-bright:#fdfdfb; --paper-dim:#e9e8e1;
  --photo-bg:#fdfdfc; --rough-a:#f0efe7; --rough-b:#e4e2d6;
  --kraft-a:#cfc9b6; --kraft-b:#bdb6a0; --kraft-c:#a9a187;
  --kraft-pa:#b3ad97; --kraft-pb:#9b9580; --kraft-pc:#827c68; --kraft-dog:#9a937d;
}
.stage[data-palette="cool"] {
  --paper:#f1f2f3; --paper-bright:#fcfcfd; --paper-dim:#e6e7e9;
  --photo-bg:#fdfefe; --rough-a:#eef0f0; --rough-b:#e1e3e3;
  --kraft-a:#c7c6bd; --kraft-b:#b3b2a7; --kraft-c:#9f9e92;
  --kraft-pa:#aeada2; --kraft-pb:#96958a; --kraft-pc:#7d7c72; --kraft-dog:#94938a;
}
.stage[data-palette="bone"] {
  --paper:#f5f3ec; --paper-bright:#fdfcf7; --paper-dim:#ece8dc;
  --photo-bg:#fdfdf9; --rough-a:#f2efe6; --rough-b:#e7e2d4;
  --kraft-a:#d3c8ab; --kraft-b:#c2b491; --kraft-c:#b0a079;
  --kraft-pa:#b6a98a; --kraft-pb:#9e9070; --kraft-pc:#857758; --kraft-dog:#a4977a;
}
.stage[data-palette="mist"] {
  --paper:#f1f3f3; --paper-bright:#fbfcfc; --paper-dim:#e5e8e8;
  --photo-bg:#fcfdfd; --rough-a:#edf1f1; --rough-b:#e0e4e4;
  --kraft-a:#c6c8c0; --kraft-b:#b1b4ab; --kraft-c:#9ca096;
  --kraft-pa:#abafa4; --kraft-pb:#92968b; --kraft-pc:#797d73; --kraft-dog:#92968c;
}

/* ---- pocket / front cover ---- */
.pocket {
  position: absolute;
  left: 0; right: 0;
  bottom: 0;
  height: 560px;
  background: linear-gradient(180deg, var(--paper-bright), var(--paper));
  clip-path: polygon(0% 18%, 100% 0%, 100% 100%, 0% 100%);
  z-index: 30;
  box-shadow: 0 -18px 40px -28px rgba(0,0,0,0.5);
}
.pocket__lip {
  position: absolute;
  left: 0; right: 0; bottom: 0; height: 560px;
  clip-path: polygon(0% 18%, 100% 0%, 100% calc(0% + 4px), 0% calc(18% + 4px));
  background: rgba(17,17,17,0.32);
  z-index: 31;
  pointer-events: none;
}

/* ---- the headline block sits on the pocket ---- */
.id {
  position: absolute;
  left: 56px;
  bottom: 56px;
  z-index: 33;
  color: var(--ink);
  max-width: 560px;
}
.id__eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-bottom: 22px;
}
.id__eyebrow b { font-family: var(--font-ui); font-weight: 800; letter-spacing: 0.14em; }
.id__eyebrow .dot { width: 7px; height: 7px; background: var(--accent); border-radius: 50%; }
.id__head {
  font-family: var(--font-display);
  font-size: 76px;
  line-height: 0.86;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  margin: 0;
}
.id__head .em { color: var(--accent); }

.cta {
  position: absolute;
  left: 56px;
  bottom: -2px;
  transform: translateY(120%);
  z-index: 34;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--ink);
  color: var(--paper-bright);
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.02em;
  padding: 15px 26px;
  border: none;
  border-radius: 40px;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.3s ease, background 0.3s ease;
}
.cta:hover { background: var(--accent); transform: translateY(120%) translateX(4px); }
.cta .arr { font-size: 18px; }

/* ---- index tabs ---- */
/* ---- index tabs: attached to the folder's right edge, BEHIND the sheets.
   The base tucks under the back panel / sheets; the labelled strip
   protrudes past the folder edge and always stays readable.          */
.tabs {
  position: absolute;
  top: 46px; bottom: 46px;
  right: -104px;
  width: 148px;
  z-index: 5;
}
.tab {
  position: absolute;
  right: 0;
  width: 148px;
  height: 202px;
  background: var(--paper-dim);
  border-radius: 0 14px 14px 0;
  box-shadow: 3px 7px 16px -9px rgba(0,0,0,0.6);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: space-between;
  padding: 16px 16px 18px 0;
  color: var(--ink);
  transition: transform 0.45s cubic-bezier(0.16,1,0.3,1), background 0.25s ease, color 0.25s ease;
  text-decoration: none;
}
/* hairline crease where the tab meets the folder body */
.tab::after {
  content: "";
  position: absolute;
  left: 42px; top: 0; bottom: 0; width: 1px;
  background: rgba(17,17,17,0.12);
  pointer-events: none;
}
.tab:hover, .tab.active {
  background: var(--ink);
  color: var(--paper-bright);
  transform: translateX(14px);
}
.tab:hover::after, .tab.active::after { background: rgba(255,255,255,0.14); }
.tab__no {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  writing-mode: vertical-rl;
}
.tab__label {
  font-family: var(--font-ui);
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

/* ---- handwritten annotation ---- */
.note {
  position: absolute;
  z-index: 35;
  pointer-events: none;
  font-family: var(--font-hand);
  color: var(--ink);
  transition: opacity 0.4s ease;
}
.note--hint {
  display: inline-flex; align-items: center; gap: 8px;
  white-space: nowrap;
  font-size: 40px;
  letter-spacing: 0.01em;
}
.note__text {
  display: inline-block;
  font-family: var(--note-font);
  transform: scaleX(1.22) skewX(7deg);
  transform-origin: left center;
}
.note--hint .arr { font-size: 0.78em; transform: translateY(-2px); }

/* grain is now drawn once on the GPU by grain-shader.js (see #grain-gl below);
   the old per-sheet CSS feTurbulence overlay is disabled */
.grain::after { content: none; }

/* GPU grain overlay canvas (created by grain-shader.js) — sits above the
   folder but below the corner chrome. The shader outputs dark speckles with
   alpha, so plain (source-over) compositing darkens like multiply WITHOUT a
   mix-blend-mode (which forced a full-screen re-blend every animated frame) */
#grain-gl {
  position: fixed;
  inset: 0;
  z-index: 59;
  pointer-events: none;
  opacity: 0.55;
}

/* hint to interact */
.scrim-hint {
  position: fixed;
  bottom: 64px; left: 50%;
  transform: translateX(-50%);
  z-index: 55;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(243,241,234,0.5);
  transition: opacity 0.4s ease;
}
.tilt-hint { display: none; }

/* entrance */
.folder { opacity: 0; }
.scaler.loaded .folder { opacity: 1; transition: opacity 0.5s ease; }

/* ---- mobile refinements (Option 1) ---- */
@media (max-width: 700px) {
  /* desktop hover hint off; show a tap hint instead */
  .scrim-hint { display: none; }
  /* hide the "View the work" button on mobile */
  .cta { display: none; }
  /* index tabs peek out just a sliver on mobile, no labels */
  .tabs { right: -40px; }
  .tab__no, .tab__label { display: none; }
  .tilt-hint {
    position: fixed; left: 50%; bottom: calc(96px + env(safe-area-inset-bottom)); transform: translateX(-50%);
    z-index: 58; display: flex; align-items: center; gap: 7px;
    font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase;
    color: rgba(243,241,234,0.85); background: rgba(20,20,20,0.66); border: 1px solid rgba(243,241,234,0.22);
    padding: 9px 16px; border-radius: 30px; white-space: nowrap;
    animation: tiltPulse 2.4s ease-in-out infinite;
  }
  @keyframes tiltPulse { 0%, 100% { opacity: 0.6; } 50% { opacity: 1; } }
  /* more breathing room + smaller corner chrome so the two labels don't crowd */
  .chrome { font-size: 9.5px; letter-spacing: 0.12em; line-height: 1.5; }
  .chrome--tl { top: 20px; left: 18px; }
  .chrome--tr { top: 20px; right: 18px; }
  .chrome--bl { bottom: 20px; left: 18px; }
  .chrome--br { bottom: 20px; right: 18px; }
  /* index-tab text: one tidy centred column, number + label same direction.
     On mobile the label swaps to a short form (data-short) so it sits fully
     inside the tab at a larger, readable size. */
  .tab { align-items: center; justify-content: center; gap: 14px; padding: 12px 0; }
  .tab__no { writing-mode: vertical-rl; transform: none; font-size: 16px; letter-spacing: 0.16em; }
  .tab__label { writing-mode: vertical-rl; transform: none; white-space: nowrap;
    letter-spacing: 0.04em; line-height: 1; font-size: 0; }
  .tab__label::before { content: attr(data-short); font-size: 26px; }
  .tab::after { display: none; }
}