:root{
  --bg:#0a0a0a;
  --surface:#181818;
  --surface-2:#242424;
  --ink:#f5f5f5;
  --ink-dim:#8c8c8c;
  --line:#333333;

  --present:#ffffff;
  --present-dim:#b0b0b0;
  --present-bg:#1c1c1c;

  --past:#9a9a9a;
  --past-dim:#5a5a5a;
  --past-bg:#161616;

  --accent: var(--present);
  --accent-dim: var(--present-dim);
  --accent-bg: var(--present-bg);

  --comment-like-idle:#8c8c8c;
  --comment-like-active:#ffffff;

  --display: 'Plus Jakarta Sans', sans-serif;
  --body: 'Plus Jakarta Sans', sans-serif;
}

/* present era: light theme, like Instagram's light mode */
body.theme-light{
  --bg:#ffffff;
  --surface:#f5f5f5;
  --surface-2:#ebebeb;
  --ink:#111111;
  --ink-dim:#6b6b6b;
  --line:#dcdcdc;

  --present:#111111;
  --present-dim:#555555;
  --present-bg:#ececec;

  --comment-like-idle:#6b6b6b;
  --comment-like-active:#111111;
}
body, .app, .modal, .history-panel, .hologram-reader-card, .btn-icon, .btn-small, .stage{
  transition: background-color .5s ease, color .5s ease, border-color .5s ease;
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--body);
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
.hidden{display:none !important;}

.app{
  max-width:480px;
  margin:0 auto;
  min-height:100vh;
  background:var(--bg);
  position:relative;
  display:flex;
  flex-direction:column;
  box-shadow:0 0 60px rgba(0,0,0,0.5);
}

/* ---------- generic screens ---------- */
.screen{
  display:none;
  flex-direction:column;
  min-height:100vh;
  padding:20px;
}
.screen.active{display:flex;}

/* ---------- brand ---------- */
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:18px;
}
.brand-mark{
  font-size:22px;
  color:var(--present);
}
.brand h1{
  font-family:var(--display);
  font-weight:600;
  font-size:24px;
  margin:0;
  letter-spacing:0.5px;
}
.tagline{
  margin:0;
  font-family:var(--body);
  font-weight:600;
  font-size:11px;
  color:var(--ink-dim);
  text-transform:lowercase;
  letter-spacing:0.5px;
}

/* ---------- camera ---------- */
.camera-frame{
  position:relative;
  flex:1;
  min-height:360px;
  background:#000;
  border-radius:12px;
  overflow:hidden;
  display:flex;
  align-items:center;
  justify-content:center;
}
#video{
  width:100%;
  height:100%;
  object-fit:cover;
}
.camera-overlay{position:absolute;inset:16px;pointer-events:none;}
.corner{
  position:absolute;
  width:22px;height:22px;
  border:2px solid var(--present);
  opacity:0.85;
}
.corner.tl{top:0;left:0;border-right:none;border-bottom:none;}
.corner.tr{top:0;right:0;border-left:none;border-bottom:none;}
.corner.bl{bottom:0;left:0;border-right:none;border-top:none;}
.corner.br{bottom:0;right:0;border-left:none;border-top:none;}
.camera-hint{
  position:absolute;
  bottom:14px;
  left:0;right:0;
  text-align:center;
  font-family:var(--body);
  font-weight:600;
  font-size:11px;
  color:var(--ink-dim);
  letter-spacing:0.5px;
  margin:0;
}
.camera-error{
  color:var(--ink);
  font-family:var(--body);
  font-weight:700;
  font-size:12px;
  text-align:center;
}

.capture-controls{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:28px;
  padding:22px 0 10px;
}
.btn-shutter{
  width:64px;height:64px;
  border-radius:50%;
  border:3px solid var(--present);
  background:transparent;
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;
  padding:0;
}
.btn-shutter span{
  width:50px;height:50px;
  border-radius:50%;
  background:var(--present);
  display:block;
}
.btn-shutter:active span{background:var(--present-dim);}
.btn-ghost{
  background:none;
  border:none;
  color:var(--ink-dim);
  font-family:var(--body);
  font-weight:600;
  font-size:12px;
  cursor:pointer;
  padding:8px;
}
.btn-ghost:hover{color:var(--ink);}

/* ---------- loading ---------- */
#screen-loading{
  align-items:center;
  justify-content:center;
  gap:18px;
  background:
    linear-gradient(var(--surface) 1px, transparent 1px),
    linear-gradient(90deg, var(--surface) 1px, transparent 1px),
    var(--bg);
  background-size:26px 26px;
}
.scanline{
  width:180px;height:2px;
  background:var(--present);
  box-shadow:0 0 12px 2px var(--present);
  animation:scan 1.4s ease-in-out infinite;
}
@keyframes scan{
  0%{transform:translateY(-60px);opacity:0.2;}
  50%{opacity:1;}
  100%{transform:translateY(60px);opacity:0.2;}
}
.loading-text{
  font-family:var(--body);
  font-weight:600;
  font-size:12px;
  color:var(--ink-dim);
  letter-spacing:0.5px;
}

/* ---------- result header ---------- */
.result-header{
  display:flex;
  align-items:flex-start;
  gap:10px;
  padding:16px 16px 8px;
}
.btn-icon{
  background:var(--surface);
  border:1px solid var(--line);
  color:var(--ink);
  width:34px;height:34px;
  border-radius:50%;
  cursor:pointer;
  font-size:15px;
  flex-shrink:0;
  display:flex;
  align-items:center;
  justify-content:center;
}
.building-id{flex:1;}
.building-id h2{
  font-family:var(--display);
  font-weight:600;
  font-size:22px;
  margin:0 0 2px;
}
.building-id p{
  margin:0;
  font-family:var(--body);
  font-weight:600;
  font-size:11px;
  color:var(--ink-dim);
  text-transform:uppercase;
  letter-spacing:0.4px;
}

.history-panel{
  margin:0 16px 10px;
  padding:14px;
  background:var(--surface);
  border-left:2px solid var(--accent);
  border-radius:0 10px 10px 0;
  font-size:13px;
  line-height:1.55;
  color:var(--ink-dim);
}
.history-panel h3{
  margin:0 0 6px;
  font-family:var(--body);
  font-weight:700;
  font-size:10px;
  text-transform:uppercase;
  letter-spacing:1px;
  color:var(--accent);
}

/* ---------- era switch ---------- */
.era-switch{
  position:relative;
  margin:4px 16px 14px;
  display:flex;
  background:var(--surface);
  border-radius:20px;
  padding:3px;
  border:1px solid var(--line);
}
.era-btn{
  flex:1;
  z-index:2;
  background:none;
  border:none;
  color:var(--ink-dim);
  font-family:var(--body);
  font-weight:700;
  font-size:12px;
  letter-spacing:0.5px;
  padding:8px 0;
  cursor:pointer;
  transition:color .25s;
}
.era-btn.active{color:var(--bg);}
.era-slider{
  position:absolute;
  top:3px;left:3px;
  width:calc(50% - 3px);
  height:calc(100% - 6px);
  border-radius:16px;
  background:var(--accent);
  transition:transform .28s ease, background .3s ease;
  z-index:1;
}
.era-slider.past{transform:translateX(100%);}

/* ---------- stage ---------- */
.stage{
  position:relative;
  margin:0 16px 14px;
  border-radius:12px;
  overflow:hidden;
  aspect-ratio:4/5;
  background:#000;
  border:1px solid var(--line);
}
.stage-photo{
  width:100%;height:100%;
  object-fit:cover;
  display:block;
  filter:brightness(0.85) saturate(1.1);
  transition:filter .4s ease;
}
.stage-tint{
  position:absolute;inset:0;
  mix-blend-mode:multiply;
  background:transparent;
  transition:background .4s ease;
  pointer-events:none;
}
.stage.is-past .stage-tint{background:linear-gradient(160deg, rgba(0,0,0,0.5), rgba(0,0,0,0.78));}
.stage.is-past .stage-photo{filter:brightness(0.5) saturate(0) contrast(1.15);}
.stage.is-present .stage-tint{background:linear-gradient(160deg, rgba(255,255,255,0.06), rgba(0,0,0,0.4));}

.past-panorama{
  position:absolute; inset:0;
  overflow:hidden;
  touch-action:none;
}
.past-panorama.hidden{display:none;}
.past-panorama-world{
  position:absolute;
  top:0; left:0;
  height:145%;
  aspect-ratio:1898/829;
  min-width:100%;
  z-index:1;
  pointer-events:none;
  will-change:transform;
}
.past-panorama-world > img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  max-width:none;
  object-fit:fill;
  filter:brightness(0.65) saturate(0) contrast(1.15);
}

.hologram-stage{
  position:absolute;
  left:35%; top:78%;
  width:clamp(140px, 9%, 230px);
  aspect-ratio:1/1;
  transform-origin:50% 100%;
  pointer-events:none;
  z-index:2;
  will-change:transform, opacity;
}
.hologram-stage.hidden{display:none;}
.hologram-sprite{
  position:absolute; inset:0;
  background-image:url('holograms/edmund-blacket/walk-cycle-sheet.png');
  background-size:300% 200%;
  background-repeat:no-repeat;
  filter:grayscale(1) drop-shadow(0 0 10px rgba(255,255,255,0.6));
  pointer-events:auto;
}
.hologram-sprite.hidden{display:none;}
.hologram-inspect{
  position:absolute; inset:0;
  width:100%; height:100%;
  object-fit:contain;
  filter:grayscale(1) drop-shadow(0 0 10px rgba(255,255,255,0.6));
  pointer-events:none;
}
.hologram-inspect.hidden{display:none;}
.hologram-caption{
  position:absolute;
  bottom:100%;
  left:50%;
  transform:translateX(-50%);
  width:max-content;
  max-width:200px;
  margin-bottom:10px;
  background:rgba(0,0,0,0.85);
  border:1px solid rgba(255,255,255,0.4);
  border-radius:10px;
  padding:8px 10px;
  text-align:center;
  pointer-events:auto;
  cursor:pointer;
  z-index:4;
}
.hologram-caption.hidden{display:none;}
.hologram-read-more{
  display:block;
  margin-top:4px;
  font-family:var(--body);
  font-weight:700;
  font-size:8.5px;
  text-transform:uppercase;
  letter-spacing:0.6px;
  color:var(--ink-dim);
}

.hologram-reader{
  position:absolute; inset:0;
  z-index:6;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:24px;
  background:rgba(0,0,0,0.8);
  backdrop-filter:blur(2px);
}
.hologram-reader.hidden{display:none;}
.hologram-reader-card{
  background:rgba(10,10,10,0.95);
  border:1px solid rgba(255,255,255,0.35);
  border-radius:14px;
  padding:20px;
  max-width:320px;
  text-align:center;
}
.hologram-reader-card p{
  margin:8px 0 16px;
  font-family:var(--display);
  font-style:italic;
  font-size:14px;
  line-height:1.55;
  color:var(--ink);
}
.hologram-caption-label{
  display:block;
  font-family:var(--body);
  font-weight:700;
  font-size:9px;
  text-transform:uppercase;
  letter-spacing:1px;
  color:var(--ink);
  margin-bottom:3px;
}
.hologram-caption p{
  margin:0;
  font-family:var(--display);
  font-style:italic;
  font-size:12px;
  line-height:1.4;
  color:var(--ink);
}

.live-badge{
  position:absolute;
  top:10px;right:10px;
  z-index:5;
  display:flex;
  align-items:center;
  gap:5px;
  background:rgba(0,0,0,0.75);
  border:1px solid var(--accent);
  color:#fff;
  font-family:var(--body);
  font-weight:700;
  font-size:10px;
  text-transform:uppercase;
  letter-spacing:0.6px;
  padding:4px 9px 4px 7px;
  border-radius:12px;
}
.live-dot{
  width:6px;height:6px;
  border-radius:50%;
  background:#fff;
  animation:pulse 1.6s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{opacity:1;}
  50%{opacity:0.3;}
}

#silhouette-canvas{
  position:absolute;inset:0;
  width:100%;height:100%;
  cursor:pointer;
  touch-action:none;
}
.stage.is-past #silhouette-canvas{pointer-events:none;}
.stage-hint{
  position:absolute;
  bottom:8px;left:0;right:0;
  text-align:center;
  margin:0;
  font-family:var(--body);
  font-size:9.5px;
  letter-spacing:0.3px;
  color:rgba(245,245,245,0.55);
  pointer-events:none;
  z-index:7;
}
.stage.is-past .stage-hint{color:#fff;text-shadow:0 1px 4px rgba(0,0,0,.9);}
.btn-enable-motion{
  position:absolute;
  left:50%;bottom:25px;
  transform:translateX(-50%);
  z-index:7;
  border:1px solid rgba(255,255,255,.7);
  border-radius:14px;
  padding:5px 10px;
  background:rgba(0,0,0,.58);
  color:#fff;
  font:700 9px var(--body);
  white-space:nowrap;
  cursor:pointer;
}

.spotlight-comment{
  position:absolute;
  top:10px;left:10px;right:10px;
  background:rgba(60,60,60,0.55);
  backdrop-filter:blur(3px);
  border-radius:10px;
  padding:10px 12px;
  z-index:4;
  transition:opacity .2s ease, background-color .5s ease;
}
.spotlight-label{
  font-family:var(--body);
  font-weight:700;
  font-size:9px;
  text-transform:uppercase;
  letter-spacing:1px;
  color:#ffffff;
}
.spotlight-comment p{
  margin:5px 0 4px;
  font-size:13px;
  line-height:1.4;
  font-weight:500;
  color:#f5f5f5;
}
.spotlight-meta{
  font-family:var(--body);
  font-weight:600;
  font-size:10px;
  color:rgba(255,255,255,0.6);
}

/* ---------- comments ---------- */
.comments-section{padding:0 16px 30px;}
.comments-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:10px;
}
.comments-head h3{
  font-family:var(--body);
  font-weight:700;
  font-size:11px;
  text-transform:uppercase;
  letter-spacing:1px;
  color:var(--ink-dim);
  margin:0;
}
.btn-small{
  background:var(--surface);
  border:1px solid var(--line);
  color:var(--ink);
  font-family:var(--body);
  font-weight:600;
  font-size:11px;
  padding:7px 12px;
  border-radius:20px;
  cursor:pointer;
  transition:border-color .15s, color .15s;
}
.btn-small:hover{border-color:var(--accent);color:var(--accent);}

.comments-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px;}
.comment-item{
  position:relative;
  display:flex;
  align-items:flex-start;
  gap:10px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:10px;
  padding:10px 12px 24px;
  cursor:pointer;
  transition:border-color .15s, background-color .5s ease;
}
.comment-item:hover{border-color:var(--accent-dim, var(--accent));}
.comment-item.highlighted{border-color:var(--accent);background:var(--surface-2);}

.comment-avatar{
  flex-shrink:0;
  width:32px;height:32px;
  border-radius:50%;
  background:var(--surface-2);
  border:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:center;
  font-family:var(--body);
  font-weight:700;
  font-size:13px;
  color:var(--ink);
  overflow:hidden;
}
.comment-avatar img{width:100%;height:100%;object-fit:cover;}
.comment-body{flex:1; min-width:0;}
.comment-text{font-size:13px;line-height:1.45;margin:0;}
.comment-username{font-weight:700; margin-right:4px;}
.comment-actions{
  margin-top:6px;
  display:flex;
  align-items:center;
  gap:10px;
}
.comment-time{
  font-family:var(--body);
  font-weight:600;
  font-size:11px;
  color:var(--ink-dim);
}
.btn-contact, .btn-delete-comment{
  background:none;
  border:none;
  padding:0;
  font-family:var(--body);
  font-weight:700;
  font-size:11px;
  color:var(--ink-dim);
  cursor:pointer;
}
.btn-contact:hover, .btn-contact.revealed{color:var(--accent);}
.btn-delete-comment:hover{color:#c84444;}
.btn-delete-comment:disabled{opacity:.45;cursor:wait;}

.comment-likes{
  flex-shrink:0;
  border:0;
  background:none;
  font-family:var(--body);
  font-weight:700;
  font-size:11px;
  color:var(--comment-like-idle);
  white-space:nowrap;
  display:flex;
  align-items:center;
  gap:3px;
  padding:2px 0 4px 6px;
  cursor:pointer;
  transition:color .15s, transform .15s;
}
.comment-likes:hover{color:var(--comment-like-active);}
.comment-likes:active{transform:scale(.92);}
.comment-likes.liked{color:var(--comment-like-active);}
.comment-likes.just-liked{
  animation:
    heart-plop .58s cubic-bezier(.2,.9,.25,1.35),
    like-colour-fill .3s ease-out;
}
.comment-likes.just-liked span{display:inline-block;animation:like-count-up .38s cubic-bezier(.2,.8,.25,1);}
@keyframes like-colour-fill{
  from{color:var(--comment-like-idle);}
  to{color:var(--comment-like-active);}
}
@keyframes heart-plop{
  0%{transform:scale(1) rotate(0);}
  24%{transform:scale(.72) rotate(-10deg);}
  52%{transform:scale(1.48) rotate(7deg);}
  74%{transform:scale(.9) rotate(-3deg);}
  88%{transform:scale(1.12) rotate(1deg);}
  100%{transform:scale(1) rotate(0);}
}
@keyframes like-count-up{
  0%{opacity:0;transform:translateY(8px) scale(.75);}
  65%{opacity:1;transform:translateY(-2px) scale(1.12);}
  100%{opacity:1;transform:translateY(0) scale(1);}
}
@media (prefers-reduced-motion:reduce){
  .comment-likes.just-liked,
  .comment-likes.just-liked span{animation:none;}
}
.comment-photo{
  margin-top:8px;
  max-width:100%;
  max-height:140px;
  border-radius:8px;
  display:block;
  object-fit:cover;
}
.activity-tag{
  position:absolute;
  right:10px;
  bottom:8px;
  background:rgba(255,255,255,0.06);
  padding:2px 8px;
  border-radius:8px;
  font-family:var(--body);
  font-size:10px;
  color:var(--ink-dim);
}

/* ---------- modal ---------- */
.modal-backdrop{
  position:fixed;inset:0;
  background:rgba(0,0,0,0.78);
  display:flex;
  align-items:flex-end;
  justify-content:center;
  z-index:50;
}
.modal{
  width:100%;
  max-width:480px;
  background:var(--surface);
  border-top:1px solid var(--line);
  border-radius:14px 14px 0 0;
  padding:20px;
  display:flex;
  flex-direction:column;
  gap:6px;
  max-height:88vh;
  overflow-y:auto;
}
.modal h3{
  font-family:var(--display);
  font-weight:600;
  font-size:18px;
  margin:0 0 8px;
}
.field-label{
  font-family:var(--body);
  font-weight:700;
  font-size:10px;
  text-transform:uppercase;
  letter-spacing:0.5px;
  color:var(--ink-dim);
  margin-top:10px;
}
#input-activity, #input-activity-other, #input-text, #input-photo,
#profile-first-name, #profile-last-initial, #profile-phone{
  background:var(--bg);
  border:1px solid var(--line);
  color:var(--ink);
  border-radius:8px;
  padding:10px;
  font-family:var(--body);
  font-size:13px;
  width:100%;
}
#input-text{resize:vertical;min-height:70px;}
#input-photo-preview{
  margin-top:8px;
  max-height:120px;
  border-radius:4px;
  object-fit:cover;
}
.modal-actions{
  display:flex;
  justify-content:flex-end;
  gap:10px;
  margin-top:16px;
}
.btn-shutter-small{
  background:var(--present);
  color:var(--bg);
  border:none;
  font-family:var(--body);
  font-weight:500;
  font-size:12px;
  padding:10px 20px;
  border-radius:20px;
  cursor:pointer;
}
.btn-profile{margin-left:auto;background:none;border:1px solid var(--line);color:var(--ink-dim);border-radius:14px;padding:6px 10px;font:700 10px var(--body);cursor:pointer;}
.btn-profile:hover{color:var(--ink);border-color:var(--ink-dim);}
.profile-photo-preview{width:72px;height:72px;border-radius:50%;object-fit:cover;border:1px solid var(--line);margin-top:8px;}
.profile-backdrop{align-items:center;padding:18px;z-index:80;}
.profile-modal{border-radius:18px;border:1px solid var(--line);max-height:calc(100vh - 36px);}
.profile-modal > p{margin:0;color:var(--ink-dim);font-size:13px;line-height:1.5;}
.profile-modal .profile-eyebrow{color:var(--present);font-weight:700;text-transform:uppercase;font-size:10px;letter-spacing:.08em;}
.profile-continue{align-self:flex-end;margin-top:16px;}
.form-error{color:#d94a4a!important;font-weight:700;}
.confirmation-modal p{
  margin:0;
  color:var(--ink-dim);
  font-size:13px;
  line-height:1.5;
}
.btn-danger{
  background:#c84444;
  color:#fff;
  border:0;
  border-radius:20px;
  padding:10px 18px;
  font-family:var(--body);
  font-weight:700;
  font-size:12px;
  cursor:pointer;
}
.btn-danger:hover{background:#de5151;}
.btn-danger:disabled{opacity:.55;cursor:wait;}

@media (max-width:400px){
  .stage{aspect-ratio:3/4;}
}

/* ---------- toast ---------- */
.toast{
  position:fixed;
  left:50%;
  bottom:64px;
  transform:translateX(-50%) translateY(6px);
  background:#111111;
  color:#f5f5f5;
  font-family:var(--body);
  font-weight:700;
  font-size:12px;
  padding:10px 18px;
  border-radius:20px;
  box-shadow:0 6px 20px rgba(0,0,0,0.35);
  opacity:0;
  pointer-events:none;
  transition:opacity .3s ease, transform .3s ease;
  z-index:100;
}
.toast.hidden{display:none;}
.toast.show{opacity:1; transform:translateX(-50%) translateY(0);}