/* ──────────────────────────────────────────────────────────────────────
   Maison Rubinacci · La Stoffa
   Capri Indaco — Tela e Spilla
   Single typeface: Bodoni Moda (variable, optical sizes, italic)
   ──────────────────────────────────────────────────────────────────── */

:root {
  --tela:        #F1ECE2;   /* chalked paper / tela bianca */
  --gesso:       #FAF6EC;   /* fresh chalk */
  --indigo:      #1C2945;   /* Neapolitan indigo wool, mid */
  --indigo-deep: #0F1626;   /* roller deep */
  --indigo-soft: #243556;   /* warp highlight */
  --pin:         #B89766;   /* spilla d'oro — the gold pin */
  --rubino:      #6E1F22;   /* seta rubino — the silk lining red */
  --carbone:     #2F2C28;   /* pencil graphite */
  --whisper:     rgba(241, 236, 226, 0.42);
  --hair:        rgba(241, 236, 226, 0.18);
  --ease-deep:   cubic-bezier(0.16, 1, 0.3, 1);
  --ease-drape:  cubic-bezier(0.22, 0.61, 0.36, 1);
  --serif:       'Bodoni Moda', 'Didot', 'Bodoni 72', serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  overflow: hidden;                  /* the bolt drifts; the page does not scroll */
  background: var(--indigo-deep);
  color: var(--tela);
  font-family: var(--serif);
  font-feature-settings: 'lnum' 0, 'onum' 1, 'tnum' 1, 'liga' 1;
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
  cursor: none;                      /* tailor's chalk takes over */
  user-select: none;
}

/* a barely-perceptible volumetric wash so the deep ink never sits flat */
body::before {
  content: '';
  position: fixed; inset: -10vmin;
  background:
    radial-gradient(60vmax 50vmax at 18% 22%, rgba(28,41,69,0.55), transparent 60%),
    radial-gradient(70vmax 60vmax at 82% 78%, rgba(15,22,38,0.85), transparent 65%),
    linear-gradient(180deg, #0B1320 0%, #0F1626 50%, #0A101B 100%);
  z-index: 0;
  pointer-events: none;
}

/* ─── Loader ─────────────────────────────────────────────────────────── */
#loader {
  position: fixed; inset: 0;
  z-index: 1000;
  background: var(--indigo-deep);
  display: grid; place-items: center;
  transition: opacity 1.6s var(--ease-deep);
}
.loader-frame {
  width: min(640px, 86vw);
  display: flex; flex-direction: column; gap: 1.6rem;
  padding: 2rem;
}
.loader-mast {
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: 0.62rem; letter-spacing: 0.34em; text-transform: uppercase;
  color: var(--whisper);
  font-weight: 360;
}
.loader-house { font-style: italic; letter-spacing: 0.18em; text-transform: none; font-size: 0.92rem; color: var(--tela); }
.loader-since { font-variant: small-caps; letter-spacing: 0.32em; }

.loader-bolt { width: 100%; height: 80px; display: block; }
.loader-readout {
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: 0.6rem; letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--whisper);
}
.loader-cm { font-feature-settings: 'tnum' 1; color: var(--gesso); letter-spacing: 0.18em; }
.loader-cm-unit { font-style: italic; opacity: 0.55; margin-left: 0.2rem; }
.loader-statement {
  font-size: clamp(0.94rem, 1.6vw, 1.1rem);
  font-style: italic; font-weight: 320;
  color: var(--gesso); letter-spacing: 0.005em;
  text-align: center;
  opacity: 0.86;
}

body:not(.is-loading) #loader { opacity: 0; pointer-events: none; }

/* ─── Persistent frame (no nav, only quiet mastheads) ──────────────────  */
.frame {
  position: fixed;
  z-index: 60;
  display: flex; flex-direction: column; gap: 0.32rem;
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--whisper);
  pointer-events: none;
  font-weight: 360;
  font-variant-numeric: tabular-nums;
}
.frame-tl { top: 1.4rem; left: 1.4rem; }
.frame-tr { top: 1.4rem; right: 1.4rem; align-items: flex-end; text-align: right; }
.frame-bl { bottom: 8.4rem; left: 1.4rem; }
.frame-br { bottom: 8.4rem; right: 1.4rem; align-items: flex-end; text-align: right; }

.frame-mark {
  font-family: var(--serif);
  font-style: italic; font-weight: 380;
  font-size: 1.1rem; letter-spacing: 0.18em;
  color: var(--gesso);
  text-transform: none;
}
.frame-sub { font-size: 0.7rem; letter-spacing: 0.28em; color: var(--tela); }
.frame-line { color: var(--whisper); }
.frame-coord { font-variant: small-caps; letter-spacing: 0.3em; color: var(--gesso); }

/* ─── Stage (the bolt) ────────────────────────────────────────────────── */
#stage { position: relative; z-index: 1; height: 100%; }

#cloth-shell {
  position: absolute; inset: 0;
  overflow: hidden;
  /* Keep the bolt away from the corner mastheads */
  padding: 0;
}
#bolt {
  position: absolute;
  top: 0; left: 0;
  height: 100%;
  /* width and translateX driven by JS — the bolt is wider than the viewport */
  display: block;
  transform: translate3d(0,0,0);
  will-change: transform;
}

/* the cloth proper — weave, sheen, foxing handled in SVG defs */
#sheen-band {
  transform-origin: 50% 50%;
  /* sheen sweeps slowly across the bolt to suggest light over silk */
  animation: silkSweep 38s linear infinite;
}
@keyframes silkSweep {
  0%   { transform: translateX(-200px); opacity: 0.55; }
  50%  { opacity: 0.85; }
  100% { transform: translateX(2400px); opacity: 0.55; }
}

/* ─── Pattern pieces (chalk hairlines) ──────────────────────────────── */
.piece-line {
  fill: none;
  stroke: var(--gesso);
  stroke-width: 1.2;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0;                         /* drawn in by JS via stroke-dashoffset */
  filter: url(#chalkSoft);
  transition: opacity 0.6s var(--ease-deep);
}
.piece-line.piece-dashed {
  stroke-dasharray: 6 6;
}
.piece.is-on .piece-line,
.piece.is-near .piece-line { opacity: 1; }

.piece-tick line, .piece-tick circle {
  fill: none;
  stroke: var(--gesso);
  stroke-width: 1.1;
  opacity: 0;
  transition: opacity 0.6s var(--ease-deep);
}
.piece-tick circle {
  fill: var(--gesso);
  stroke: none;
  opacity: 0;
}
.piece.is-on .piece-tick line,
.piece.is-on .piece-tick circle,
.piece.is-near .piece-tick line,
.piece.is-near .piece-tick circle { opacity: 0.92; }

.grain line { stroke: var(--gesso); stroke-width: 0.8; opacity: 0; transition: opacity 0.7s var(--ease-deep); }
.grain polygon { fill: var(--gesso); opacity: 0; transition: opacity 0.7s var(--ease-deep); }
.grain text {
  fill: var(--gesso);
  font-family: var(--serif);
  font-style: italic;
  font-size: 17px;
  letter-spacing: 0.06em;
  opacity: 0;
  transition: opacity 0.7s var(--ease-deep);
  font-weight: 360;
}
.piece.is-on .grain line, .piece.is-on .grain polygon, .piece.is-on .grain text { opacity: 0.7; }

.piece-gather line { stroke: var(--gesso); stroke-width: 1; opacity: 0; transition: opacity 0.6s var(--ease-deep); }
.piece.is-on .piece-gather line { opacity: 0.8; }

.piece-stitch circle {
  fill: var(--gesso); opacity: 0;
  transition: opacity 0.7s var(--ease-deep);
}
.piece.is-on .piece-stitch circle { opacity: 0.85; }

.piece-ripple path {
  fill: none; stroke: var(--gesso);
  stroke-width: 0.9; opacity: 0;
  transition: opacity 0.7s var(--ease-deep);
}
.piece.is-on .piece-ripple path { opacity: 0.78; }

.piece-fray line { stroke: var(--gesso); stroke-width: 0.7; opacity: 0; transition: opacity 0.7s var(--ease-deep); }
.piece.is-on .piece-fray line { opacity: 0.5; }

.piece-pad path {
  fill: none;
  stroke: var(--rubino);
  stroke-width: 0.7;
  opacity: 0;
  transition: opacity 0.9s var(--ease-deep);
}
.piece.is-on .piece-pad path { opacity: 0.85; }

.piece-title {
  fill: var(--gesso);
  font-family: var(--serif);
  font-style: italic;
  font-weight: 460;
  font-size: 30px;
  letter-spacing: 0.04em;
  opacity: 0;
  transition: opacity 0.8s var(--ease-deep);
}
.piece.is-near .piece-title,
.piece.is-on  .piece-title { opacity: 1; }

.piece-trans {
  fill: var(--gesso);
  font-family: var(--serif);
  font-style: italic;
  font-weight: 320;
  font-size: 16px;
  letter-spacing: 0.05em;
  opacity: 0;
  transition: opacity 0.8s var(--ease-deep);
}
.piece.is-on .piece-trans { opacity: 0.76; }

.piece-mark {
  fill: var(--gesso);
  font-family: var(--serif);
  font-style: italic;
  font-size: 22px;
  font-weight: 380;
  opacity: 0;
  transition: opacity 0.7s var(--ease-deep);
}
.piece.is-on .piece-mark { opacity: 0.72; }

/* The cipher: maison monogram on the right selvedge */
#cipher { opacity: 0; transition: opacity 1.4s var(--ease-deep); }
#cipher.is-on { opacity: 1; }
.cipher-mr {
  fill: var(--gesso);
  font-family: var(--serif);
  font-style: italic;
  font-weight: 460;
  font-size: 36px;
  letter-spacing: 0.08em;
}
.cipher-year {
  fill: var(--gesso);
  font-family: var(--serif);
  font-size: 12px;
  font-style: italic;
  font-weight: 340;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  opacity: 0.6;
}

/* ─── Prose stage (the active piece's chapter line, dispersion-arrival) ── */
.prose-stage {
  position: fixed;
  left: 50%;
  bottom: 9.6rem;
  transform: translateX(-50%);
  z-index: 50;
  width: min(720px, 86vw);
  display: flex; flex-direction: column; gap: 0.72rem;
  text-align: center;
  pointer-events: none;
}
.prose-piece {
  font-size: 0.66rem;
  letter-spacing: 0.36em;
  text-transform: uppercase;
  font-variant: small-caps;
  color: var(--whisper);
  font-weight: 360;
}
.prose-line {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 340;
  font-size: clamp(1.3rem, 2.4vw, 2rem);
  line-height: 1.5;
  color: var(--gesso);
  letter-spacing: 0.005em;
  text-wrap: pretty;
  hyphens: none;
  -webkit-hyphens: none;
}
/* word-locked dispersion typography (Lesson #86): never break mid-word */
.prose-line .word { display: inline-block; white-space: nowrap; }
.prose-line .ws { display: inline-block; }
.prose-line .ltr {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.36em);
  filter: blur(8px);
  transition:
    opacity 0.9s var(--ease-deep),
    transform 0.9s var(--ease-deep),
    filter 0.9s var(--ease-deep);
  transition-delay: calc(var(--li, 0) * 22ms);
}
.prose-line.is-in .ltr {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}
.prose-cite {
  font-size: 0.62rem; letter-spacing: 0.32em; text-transform: uppercase;
  color: var(--whisper);
  font-variant: small-caps;
  font-weight: 360;
}

/* ─── Tape-measure rail (0 → 540 cm) ──────────────────────────────────── */
#rail {
  position: fixed;
  left: 1.4rem; right: 1.4rem; bottom: 2.4rem;
  z-index: 55;
  display: flex; flex-direction: column; gap: 0.4rem;
  pointer-events: auto;
}
.rail-spine {
  height: 1px; width: 100%;
  background: var(--hair);
}
.rail-track {
  position: relative;
  height: 30px;
}
#rail-marks {
  position: relative;
  list-style: none;
  height: 30px;
  width: 100%;
}
#rail-marks li {
  position: absolute;
  top: 0;
  width: 1px;
  background: var(--whisper);
  transition: height 0.5s var(--ease-deep), opacity 0.5s var(--ease-deep), background 0.5s var(--ease-deep);
}
#rail-marks li.minor   { height: 6px;  opacity: 0.45; }
#rail-marks li.major   { height: 12px; opacity: 0.78; }
#rail-marks li.chapter { height: 22px; opacity: 1;    background: var(--gesso); cursor: pointer; }
/* default chapter mark shows only its ordinal (I … VIII) above the tick */
#rail-marks li.chapter::after {
  content: attr(data-ord);
  position: absolute;
  top: -18px; left: 50%;
  transform: translateX(-50%);
  font-family: var(--serif);
  font-style: italic;
  font-weight: 360;
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  white-space: nowrap;
  color: var(--whisper);
  transition: color 0.5s var(--ease-deep), opacity 0.5s var(--ease-deep), top 0.5s var(--ease-deep);
  opacity: 0.62;
}
/* active chapter promotes its full label above (and the ordinal becomes the long form) */
#rail-marks li.chapter.is-active::after {
  content: attr(data-label);
  color: var(--gesso);
  opacity: 1;
  top: -22px;
}
#rail-marks li.chapter.is-active { background: var(--pin); }
#rail-marks li.chapter:hover::after { color: var(--gesso); opacity: 1; }
/* the live indicator carriage */
#rail-cursor {
  position: absolute;
  top: -4px;
  width: 1px; height: 38px;
  background: var(--gesso);
  pointer-events: none;
  transition: transform 0.5s var(--ease-drape);
}
#rail-cursor::before {
  content: '';
  position: absolute;
  top: -3px; left: -3px;
  width: 7px; height: 7px;
  background: var(--gesso);
  border-radius: 50%;
}

.rail-readout {
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: 0.62rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--whisper);
  padding-top: 0.1rem;
  font-variant-numeric: tabular-nums;
}
.rail-house { font-style: italic; letter-spacing: 0.2em; text-transform: none; font-size: 0.72rem; color: var(--gesso); }
.rail-cm { color: var(--gesso); letter-spacing: 0.18em; }
.rail-of { color: var(--whisper); margin-left: 0.2rem; }

/* ─── Invitation (closing inscription on the cloth, not a footer) ────── */
#invitation {
  position: fixed;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  z-index: 70;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.4rem 1.8rem;
  background: rgba(15, 22, 38, 0.78);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-top: 1px solid var(--hair);
  border-bottom: 1px solid var(--hair);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--gesso);
  font-style: italic;
  font-weight: 340;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.9s var(--ease-deep);
}
#invitation.is-on { opacity: 1; pointer-events: auto; }
#invitation .inv-mark { color: var(--pin); font-style: normal; }
#invitation a {
  color: var(--gesso);
  text-decoration: none;
  border-bottom: 1px solid var(--pin);
  padding-bottom: 1px;
  transition: color 0.4s var(--ease-deep), border-color 0.4s var(--ease-deep);
}
#invitation a:hover { color: var(--pin); border-color: var(--gesso); }
#invitation .inv-key {
  font-style: normal;
  font-size: 0.62rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--whisper);
}

/* ─── Custom cursor: tailor's chalk + dust trail canvas ──────────────── */
#dust {
  position: fixed; inset: 0;
  z-index: 75;
  pointer-events: none;
}
#chalk {
  position: fixed;
  top: 0; left: 0;
  z-index: 80;
  width: 24px; height: 24px;
  pointer-events: none;
  mix-blend-mode: screen;
  transform: translate3d(-100px, -100px, 0) rotate(-22deg);
  transition: transform 60ms linear, opacity 0.4s var(--ease-deep);
}
#chalk svg { display: block; filter: drop-shadow(0 0 4px rgba(250,246,236,0.35)); }
#chalk.is-mark { transform: translate3d(var(--cx, 0), var(--cy, 0), 0) rotate(-32deg) scale(1.1); }
#chalk.is-hidden { opacity: 0; }

/* On touch devices, the chalk is irrelevant */
@media (hover: none) { #chalk, #dust { display: none; } body { cursor: default; } }

/* ─── Mobile perfection ───────────────────────────────────────────────── */
@media (max-width: 820px) {
  /* keep architecture readable: render the bolt at full pattern-piece height,
     and let drag scroll across the longer bolt */
  #bolt { height: 100%; }

  .frame { font-size: 0.56rem; letter-spacing: 0.18em; gap: 0.22rem; }
  .frame-tl, .frame-bl { left: 1rem; }
  .frame-tr, .frame-br { right: 1rem; }
  .frame-tl { top: 1rem; }
  .frame-tr { top: 1rem; }
  .frame-bl { bottom: 7.4rem; }
  .frame-br { bottom: 7.4rem; display: none; } /* keep the corner uncluttered on phones */

  .frame-mark { font-size: 0.94rem; letter-spacing: 0.14em; }
  .frame-sub  { font-size: 0.6rem; letter-spacing: 0.22em; }

  .prose-stage { bottom: 8.8rem; gap: 0.4rem; width: calc(100% - 2rem); left: 1rem; transform: none; }
  .prose-piece { font-size: 0.58rem; letter-spacing: 0.28em; }
  .prose-line  { font-size: clamp(1rem, 4.4vw, 1.4rem); line-height: 1.5; text-align: left; }
  .prose-cite  { font-size: 0.56rem; letter-spacing: 0.26em; text-align: left; }

  #rail { left: 1rem; right: 1rem; bottom: 1.6rem; }
  #rail-marks li.major   { height: 8px; }
  #rail-marks li.chapter { height: 16px; }
  #rail-marks li.chapter::after { font-size: 0.58rem; letter-spacing: 0.12em; top: -18px; }
  /* on small viewports keep only the chapter labels for active/hovered marks */
  #rail-marks li.chapter:not(.is-active)::after { content: ''; }
  .rail-readout { font-size: 0.56rem; letter-spacing: 0.22em; }
  .rail-house { font-size: 0.66rem; }

  #invitation { font-size: 0.7rem; gap: 0.6rem; padding: 1rem 1.2rem; flex-direction: column; align-items: flex-start; text-align: left; width: min(360px, 86vw); }
  #invitation .inv-key { display: none; }
}

@media (max-width: 380px) {
  .prose-line { font-size: 0.94rem; }
  .frame-sub { display: none; }
  #rail-marks li.chapter::after { display: none; }
}

/* Reduced motion: keep the cloth still, but drape settles instantly */
@media (prefers-reduced-motion: reduce) {
  #sheen-band { animation: none; }
  .prose-line .ltr { transition-duration: 0.4s; }
}