/* viewer.css — the experience runtime. The reader fills the viewport below the
   app topbar; in immersive/fullscreen it takes everything. The stage is the
   work's exact logical canvas, uniformly scaled, so compositions are pixel-
   faithful at any size. Each work injects --work-accent for its own chrome. */

.reader {
  --work-accent: #C0492B;
  position: fixed; inset: 64px 0 0 0; z-index: 40;
  display: flex; flex-direction: column;
  background:
    radial-gradient(80% 60% at 50% 0%, color-mix(in srgb, var(--work-accent) 9%, transparent) 0%, transparent 60%),
    var(--paper-2);
}
.reader.immersive { inset: 0; z-index: 120; background: #0d0b09; }

.reader-bar { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-4);
  padding: 10px var(--sp-5); border-bottom: 2px solid var(--work-accent);
  background: color-mix(in srgb, var(--paper) 80%, transparent); backdrop-filter: blur(10px);
  transition: opacity .3s var(--ease); }
.reader.immersive .reader-bar { position: absolute; top: 0; left: 0; right: 0; z-index: 5;
  background: linear-gradient(to bottom, rgba(0,0,0,.5), transparent); border: none; color: #fff; opacity: 0; }
.reader.immersive:hover .reader-bar { opacity: 1; }
.reader-title { display: flex; align-items: center; gap: 10px; min-width: 0; }
.reader-title b { font-family: var(--font-display); font-weight: 600; font-size: 16px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.preview-badge { font-size: 10px; font-weight: 700; letter-spacing: .12em; padding: 3px 8px;
  border-radius: 100px; background: var(--work-accent); color: #fff; }
.reader-progress { font-variant-numeric: tabular-nums; color: var(--muted); font-size: 13.5px;
  min-width: 64px; text-align: right; }
.reader.immersive .reader-progress { color: rgba(255,255,255,.85); }
.reader-ctl { color: inherit; }

/* stage */
.stage-wrap { flex: 1; position: relative; display: grid; place-items: center; overflow: auto;
  min-width: 0; min-height: 0; cursor: default; padding: 8px; }
.stage-holder { position: relative; flex: none; margin: auto; }
.stage { transform-origin: top left; position: absolute; top: 0; left: 0; }
.page-stage { position: absolute; inset: 0; overflow: hidden;
  border-radius: 4px; box-shadow: var(--shadow-pop); background: #fff; }
.reader.immersive .page-stage { box-shadow: 0 30px 90px rgba(0,0,0,.6); }

/* nodes */
.node { position: absolute; }
.node-text { overflow: hidden; }
.hotspot { background: transparent; border: 1.5px dashed transparent; border-radius: 8px;
  display: grid; place-items: center; transition: background .15s var(--ease), border-color .15s var(--ease); cursor: pointer; }
.hotspot:hover { background: color-mix(in srgb, var(--work-accent) 14%, transparent);
  border-color: color-mix(in srgb, var(--work-accent) 60%, transparent); }
.hotspot-label { font-family: var(--font-ui); font-size: 14px; font-weight: 600; color: var(--work-accent);
  background: rgba(255,255,255,.9); padding: 4px 10px; border-radius: 100px; opacity: 0; transition: opacity .15s; }
.hotspot:hover .hotspot-label { opacity: 1; }

/* page-turn animation */
@keyframes turnInFwd { from { opacity: 0; transform: translateX(40px); } to { opacity: 1; transform: none; } }
@keyframes turnInBack { from { opacity: 0; transform: translateX(-40px); } to { opacity: 1; transform: none; } }
@keyframes turnOutFwd { to { opacity: 0; transform: translateX(-30px); } }
@keyframes turnOutBack { to { opacity: 0; transform: translateX(30px); } }
.turn-in-fwd { animation: turnInFwd .36s var(--ease) both; }
.turn-in-back { animation: turnInBack .36s var(--ease) both; }
.turn-out-fwd { animation: turnOutFwd .34s var(--ease) both; }
.turn-out-back { animation: turnOutBack .34s var(--ease) both; }

/* entrance animations for nodes */
.pre-anim { opacity: 0; }
.pre-anim[data-anim="rise"] { transform: translateY(26px); }
.pre-anim[data-anim="zoom"] { transform: scale(.9); }
.anim-fade { animation: aFade .6s var(--ease) both; }
.anim-rise { animation: aRise .62s var(--ease) both; }
.anim-zoom { animation: aZoom .55s var(--ease) both; }
@keyframes aFade { from { opacity: 0; } to { opacity: 1; } }
@keyframes aRise { from { opacity: 0; transform: translateY(26px); } to { opacity: 1; transform: none; } }
@keyframes aZoom { from { opacity: 0; transform: scale(.9); } to { opacity: 1; transform: none; } }
.revealed { animation: aZoom .4s var(--ease) both; }

/* nav arrows */
.reader-nav { position: absolute; inset: 0; pointer-events: none; }
.nav-arrow { pointer-events: auto; position: absolute; top: 50%; transform: translateY(-50%);
  width: 52px; height: 52px; border-radius: 50%; background: var(--surface);
  border: 1px solid var(--line-strong); box-shadow: var(--shadow-2); color: var(--ink);
  display: grid; place-items: center; transition: opacity var(--ease), transform var(--ease); }
.nav-arrow.left { left: 22px; }
.nav-arrow.right { right: 22px; }
.nav-arrow:hover { background: var(--surface-2); }
.nav-arrow.disabled { opacity: 0; pointer-events: none; }
.nav-arrow.hint { box-shadow: 0 0 0 4px var(--accent-soft), var(--shadow-2); }
.reader.immersive .nav-arrow { background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.2);
  color: #fff; opacity: 0; }
.reader.immersive:hover .nav-arrow { opacity: 1; }
.reader.immersive .nav-arrow.disabled { opacity: 0; }

@media (max-width: 760px) {
  .reader { inset: 56px 0 0 0; }
  .nav-arrow { width: 44px; height: 44px; }
  .nav-arrow.left { left: 8px; } .nav-arrow.right { right: 8px; }
}

/* Clickable link nodes + image hover effects (creator-authored) */
.node-link { cursor: pointer; }
.node-image { transition: transform .25s var(--ease), box-shadow .25s var(--ease); }
.node-image.hov-zoom:hover { transform: scale(1.04); }
.node-image.hov-lift:hover { transform: translateY(-6px); box-shadow: 0 18px 40px rgba(0,0,0,.28); }
.hotspot.on-hover { cursor: pointer; }

/* Single-work site mode: focused, fills the viewport (no app topbar above it) */
.reader.single, body.single-site .reader { inset: 0; z-index: 60; }

/* Creator backdrop image (blur / fade / transparency), sits behind the stage */
.reader-backdrop { position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-size: cover; background-position: center; background-repeat: no-repeat; }
.reader-backdrop.fade {
  -webkit-mask-image: radial-gradient(ellipse 82% 82% at 50% 45%, #000 48%, transparent 100%);
          mask-image: radial-gradient(ellipse 82% 82% at 50% 45%, #000 48%, transparent 100%); }
/* Keep chrome + stage above the backdrop */
.reader-bar, .stage-wrap, .reader-nav { position: relative; z-index: 1; }
.reader.immersive .reader-bar { z-index: 5; }

/* Focused reading: hide app chrome for single-work home + shared /read links */
body.single-site .topbar, body.reading-focused .topbar { display: none !important; }
body.single-site .reader, body.reading-focused .reader { inset: 0; z-index: 60; }

/* Make navigation arrows obvious; pulse the forward arrow until first turn */
.nav-arrow { color: var(--work-accent); }
.nav-arrow .icon { width: 26px; height: 26px; }
@keyframes navpulse {
  0%, 100% { transform: translateY(-50%) scale(1); box-shadow: var(--shadow-2); }
  50% { transform: translateY(-50%) scale(1.08); box-shadow: 0 0 0 6px var(--accent-soft), var(--shadow-2); }
}
.nav-arrow.pulse { animation: navpulse 1.6s ease-in-out infinite; }

/* Structured covers — distinct accent-driven look (sizes are canvas units) */
.cover-page { position: absolute; inset: 0; display: flex; flex-direction: column; padding: 9% 10%;
  color: #fff; box-sizing: border-box;
  background: linear-gradient(150deg, var(--work-accent), color-mix(in srgb, var(--work-accent) 50%, #14110e)); }
.cover-page.front { justify-content: center; text-align: center; align-items: center; }
.cover-rule { width: 70px; height: 6px; border-radius: 3px; background: rgba(255,255,255,.9); margin-bottom: 7%; }
.cover-title { font-family: var(--font-display); font-size: 68px; line-height: 1.04; font-weight: 600; margin: 0 0 .28em; }
.cover-subtitle { font-family: var(--font-read); font-size: 27px; opacity: .92; margin: 0 0 1em; font-style: italic; }
.cover-author { font-family: var(--font-ui); font-size: 23px; letter-spacing: .04em; opacity: .96; margin: 0; }
.cover-foot { margin-top: auto; display: flex; flex-direction: column; gap: 5px; align-items: center;
  font-family: var(--font-ui); font-size: 16px; opacity: .85; padding-top: 8%; }
.cover-page.back { justify-content: flex-start; gap: 24px; text-align: left; }
.cover-blurb { font-family: var(--font-read); font-size: 27px; line-height: 1.62; margin: 0; }
.cover-links { display: flex; flex-direction: column; gap: 11px; }
.cover-link { color: #fff; font-family: var(--font-ui); font-size: 20px; text-decoration: underline;
  opacity: .92; word-break: break-all; }
.cover-foot-back { margin-top: auto; font-family: var(--font-ui); font-size: 15px; opacity: .8; }

.cover-page.has-image, .cover-page.back { background-size: cover; background-position: center; }
.cover-extra { font-family: var(--font-read); font-size: 20px; opacity: .9; margin: 0.6em 0 0; line-height: 1.5; }

/* SCMA reader navigation visibility + audio loading feedback.
   Keeps page arrows visible and gives readers a clear audio-preparing signal. */
.reader-nav { z-index: 8; }
.nav-arrow,
.reader.immersive .nav-arrow {
  opacity: 1;
  background: color-mix(in srgb, var(--surface) 92%, var(--work-accent));
  color: var(--work-accent);
  border: 2px solid color-mix(in srgb, var(--work-accent) 70%, #ffffff);
  box-shadow: 0 14px 40px rgba(0,0,0,.28), 0 0 0 4px color-mix(in srgb, var(--work-accent) 18%, transparent);
}
.nav-arrow:hover,
.reader.immersive .nav-arrow:hover {
  opacity: 1;
  transform: translateY(-50%) scale(1.06);
}
.nav-arrow.disabled,
.reader.immersive .nav-arrow.disabled {
  opacity: .22;
  pointer-events: none;
}
.reader-audio-loading {
  position: absolute;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  z-index: 9;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  color: var(--ink);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-2);
  font-size: 13px;
  font-weight: 650;
  backdrop-filter: blur(10px);
}
.reader-audio-loading[hidden] { display: none !important; }
.reader-audio-spinner {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid color-mix(in srgb, var(--work-accent) 25%, transparent);
  border-top-color: var(--work-accent);
  animation: readerAudioSpin .8s linear infinite;
}
@keyframes readerAudioSpin { to { transform: rotate(360deg); } }
@media (max-width: 760px) {
  .reader-audio-loading { bottom: 18px; max-width: calc(100vw - 32px); }
  .nav-arrow,
  .reader.immersive .nav-arrow { width: 48px; height: 48px; }
}

/* SCMA audio visibility: audio must be obvious, not hidden behind mute. */
.reader-audio-ctl {
  min-width: max-content;
  gap: 7px;
  padding-inline: 12px;
  font-weight: 800;
}
.reader-audio-ctl.audio-on {
  border-color: color-mix(in srgb, var(--work-accent) 70%, white);
  background: color-mix(in srgb, var(--work-accent) 18%, var(--surface));
}
.reader-audio-ctl.audio-muted { opacity: .82; }
.reader-audio-prompt {
  position: absolute;
  left: 50%;
  bottom: 82px;
  transform: translateX(-50%);
  z-index: 10;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 1px solid color-mix(in srgb, var(--work-accent) 60%, white);
  border-radius: 999px;
  background: color-mix(in srgb, var(--work-accent) 20%, var(--surface));
  color: var(--ink);
  box-shadow: var(--shadow-2);
  padding: 12px 16px;
  font-weight: 900;
  cursor: pointer;
}
.reader-audio-prompt[hidden] { display: none !important; }
@media (max-width: 760px) {
  .reader-audio-ctl span { display: inline; }
  .reader-audio-prompt { bottom: 74px; }
}


/* SCMA admin reader-bar visibility modes. */
.reader.reader-bar-show .reader-bar { opacity: 1; pointer-events: auto; }
.reader.reader-bar-hover .reader-bar { opacity: 0; pointer-events: none; transition: opacity .18s var(--ease); }
.reader.reader-bar-hover:hover .reader-bar,
.reader.reader-bar-hover:focus-within .reader-bar { opacity: 1; pointer-events: auto; }
.reader.reader-bar-hidden .reader-bar { display: none !important; }

/* SCMA page-turn arrows: keep them visibly discoverable when enabled. */
.reader-nav { z-index: 20; pointer-events: none; }
.nav-arrow,
.reader.immersive .nav-arrow {
  opacity: 1 !important;
  visibility: visible !important;
  pointer-events: auto;
  width: 58px;
  height: 58px;
  background: rgba(255,255,255,.96);
  color: var(--work-accent);
  border: 3px solid color-mix(in srgb, var(--work-accent) 78%, #ffffff);
  box-shadow: 0 18px 48px rgba(0,0,0,.34), 0 0 0 5px color-mix(in srgb, var(--work-accent) 24%, transparent);
}
.nav-arrow .icon { width: 30px; height: 30px; stroke-width: 2.2; }
.nav-arrow.disabled,
.reader.immersive .nav-arrow.disabled {
  opacity: .48 !important;
  visibility: visible !important;
  pointer-events: none;
  filter: saturate(.8);
}
.reader.immersive .nav-arrow { background: rgba(18,18,18,.72); color: #fff; border-color: rgba(255,255,255,.8); }
@media (max-width: 760px) {
  .nav-arrow, .reader.immersive .nav-arrow { width: 50px; height: 50px; }
}