:root {
  /* ── Core palette ── */
  --black: #000000;
  --white: #ffffff;
  --white-32: rgba(255, 255, 255, 0.32);

  /* Legacy aliases kept for internal components */
  --app-bg: var(--black);
  --text-primary: var(--white);
  --text-secondary: #8888a0;
  --text-muted: #555566;
  --accent: #00ffaa;
  --accent-dim: #00cc88;
  --accent-glow: rgba(0, 255, 170, 0.3);
  --border: #2a2a3a;
  --error: #ff4466;
  --warning: #ffaa00;

  /* ── Typography ── */
  --font-display: 'Outfit', sans-serif;
  --font-mono: 'Kode Mono', monospace;
  --font-kode-mono: 'Kode Mono', monospace;
  --font-b612-mono: 'B612 Mono', monospace;
  --letter-spacing-sub: -0.04em;

  /* ── Camera frame ── */
  --camera-margin: 24px;

  /* ── Shutter button ── */
  --shutter-size: 72px;
  --shutter-size-mobile: 72px;

  /* ── Flip button ── */
  --flip-btn-size: 44px;

  /* ── Info button (kept for JS compatibility) ── */
  --info-button-size: 44px;
  --info-button-size-mobile: 40px;
  --info-button-bg: rgba(255, 255, 255, 0.1);
  --info-button-border: rgba(255, 255, 255, 0.2);

  /* ── Connection status ── */
  --status-connected: #00ffaa;
  --status-disconnected: #ff4466;
  --status-size: 8px;

  /* ── Progress bar ── */
  --progress-height: 48px;
  --progress-height-mobile: 40px;
  --progress-bg: rgba(60, 60, 60, 0.9);
  --progress-fill: var(--white);
  --progress-marker-width: 4px;
  --progress-marker-color: rgba(0, 0, 0, 0.3);
  --progress-text-size: 0.75rem;
  --progress-text-size-mobile: 0.7rem;

  /* ── Controls layout ── */
  --controls-gap: 24px;
  --controls-gap-mobile: 20px;
  --controls-padding-bottom: 24px;
}

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

body {
  font-family: var(--font-display);
  background: var(--black);
  color: var(--white);
  min-height: 100dvh;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

/* ─────────────────────────────────────────
   Page layout
───────────────────────────────────────── */

.container {
  width: 100%;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

/* ─────────────────────────────────────────
   Viewport area — top 80% of the screen, full-bleed
───────────────────────────────────────── */

.viewport-area {
  flex: 0 0 80%;
  min-height: 0;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: stretch;
}

/* ─────────────────────────────────────────
   Viewport frame (holds preview-area)
───────────────────────────────────────── */

.viewport-frame {
  position: relative;
  width: 100%;
  height: 100%;
}

/* ─────────────────────────────────────────
   Preview area — fills the viewport frame
───────────────────────────────────────── */

.preview-area {
  position: relative;
  width: 100%;
  height: 100%;
  background: var(--black);
  overflow: hidden;
}

/* Model viewer layer — overlays the preview viewport */
.model-viewer-layer {
  position: absolute;
  inset: 0;
  z-index: 3;
  background: var(--black);
  overflow: hidden;
}

.model-viewer-layer model-viewer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* Point Cloud Canvas */
#pointCloudCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 5;
  display: none;
}

/* Point Cloud Status Overlay */
.point-cloud-status {
  position: absolute;
  bottom: 20px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  z-index: 6;
  pointer-events: none;
}

.point-cloud-status span {
  padding: 8px 20px;
  background: rgba(0, 0, 0, 0.8);
  border: 1px solid var(--white-32);
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.9);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  backdrop-filter: blur(8px);
}

/* Model Status Badge */
.model-status-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 8px 16px;
  background: rgba(0, 0, 0, 0.9);
  border: 1px solid var(--accent);
  border-radius: 8px;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  z-index: 20;
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 16px rgba(0, 255, 170, 0.2);
}

.preview-area video,
.preview-area img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ─────────────────────────────────────────
   Permission placeholder
───────────────────────────────────────── */

.placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  /* Dot grid */
  background-color: var(--black);
  background-image: radial-gradient(circle, rgba(255, 255, 255, 0.18) 1.5px, transparent 1.5px);
  background-size: 22px 22px;
}

/* Soft dark ellipse in the centre so text is readable over the dots */
.placeholder-blur-overlay {
  position: absolute;
  width: 80%;
  height: 55%;
  background: rgba(0, 0, 0, 0.92);
  border-radius: 50%;
  filter: blur(64px);
  pointer-events: none;
  z-index: 0;
}

.placeholder-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
  padding: 0 24px;
  user-select: none;
}

.placeholder-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
  letter-spacing: 0.02em;
}

.placeholder-sub {
  font-family: var(--font-kode-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.55);
}

/* ─────────────────────────────────────────
   Controls strip — fixed height from bottom so viewport never shifts
───────────────────────────────────────── */

.controls {
  flex: 0 0 20%;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 var(--camera-margin);
}

/* Hidden — remove from layout entirely */
.info-button {
  display: none !important;
}

.controls-main {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--controls-gap);
  width: 100%;
  min-width: 0;
  height: 84px; /* fixed: tallest mode is 40px bar + 4px gap + 40px cancel */
}

/* Review / generation / model-ready control groups */
.review-controls,
.generation-controls,
.model-ready-controls {
  display: none;
  flex: 1;
  gap: 10px;
  min-width: 0;
  align-items: center;
}

.model-ready-controls {
  flex-direction: column;
  align-items: stretch;
}

.blender-connect-hint {
  font-family: 'B612 Mono', monospace;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.45);
  line-height: 1.6;
}

.blender-connect-url-row {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.blender-connect-url {
  color: rgba(255, 255, 255, 0.75);
  word-break: break-all;
  white-space: normal;
}

/* Toast notification */
.copy-toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: rgba(30, 30, 40, 0.95);
  color: #fff;
  font-family: 'B612 Mono', monospace;
  font-size: 12px;
  padding: 8px 16px;
  border-radius: 4px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease-out, transform 0.15s ease-out;
  z-index: 9999;
  white-space: nowrap;
}

.copy-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Buttons row inside model-ready-controls */
.model-ready-controls .model-ready-btns {
  display: flex;
  gap: 10px;
  align-items: center;
}

.generation-controls {
  flex-direction: column;
  gap: 16px;
  align-items: stretch;
}

.generation-progress {
  flex: 1 1 auto;
  min-width: 0;
  height: var(--progress-height);
}

.generation-progress .progress-bar {
  width: 100%;
  height: 100%;
}

/* Mode activation */
.controls-main.isolate-mode .isolate-controls   { display: flex; }
.controls-main.review-mode .review-controls     { display: flex; }
.controls-main.generation-mode .generation-controls { display: flex; }
.controls-main.model-ready-mode .model-ready-controls { display: flex; }

/* Hide shutter + flip + spacer in all non-default modes */
.controls-main.isolate-mode .shutter-button,
.controls-main.review-mode .shutter-button,
.controls-main.generation-mode .shutter-button,
.controls-main.model-ready-mode .shutter-button,
.controls-main.isolate-mode .flip-btn,
.controls-main.review-mode .flip-btn,
.controls-main.generation-mode .flip-btn,
.controls-main.model-ready-mode .flip-btn,
.controls-main.isolate-mode .flip-spacer,
.controls-main.review-mode .flip-spacer,
.controls-main.generation-mode .flip-spacer,
.controls-main.model-ready-mode .flip-spacer {
  display: none !important;
}

/* Prevent other panels from showing in wrong modes */
.controls-main.generation-mode .review-controls,
.controls-main.model-ready-mode .review-controls,
.controls-main.model-ready-mode .generation-controls {
  display: none !important;
}

/* ─────────────────────────────────────────
   Tech-style review buttons
───────────────────────────────────────── */

.tech-btn {
  position: relative;
  flex: 1;
  min-width: 0;
  height: 48px;
  border: none;
  cursor: pointer;
  padding: 0 16px;
  font-family: var(--font-kode-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: opacity 0.15s ease, transform 0.1s ease;
  clip-path: polygon(
    0 0,
    100% 0,
    100% 100%,
    14px 100%,
    0 calc(100% - 14px)
  );
}

.tech-btn:active:not(:disabled) { transform: scale(0.98); }
.tech-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.tech-btn__content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  width: 100%;
  height: 100%;
}

.tech-btn__bracket  { width: 8px; height: 20px; flex-shrink: 0; }
.tech-btn__arrow    { width: 8px; height: 10px; flex-shrink: 0; }
.tech-btn__label    { white-space: nowrap; }

/* Primary — white */
.tech-btn--primary { background: var(--white); color: var(--black); box-shadow: 0 0 12px rgba(255, 255, 255, 0.35), 0 0 24px rgba(255, 255, 255, 0.15); }
.tech-btn--primary:hover:not(:disabled) { background: #f0f0f0; }

/* Secondary — grey */
.tech-btn--secondary { background: #2a2a2a; color: var(--white); }
.tech-btn--secondary:hover:not(:disabled) { background: #353535; }

/* Square cancel */
.tech-btn.tech-btn--cancel {
  flex: 0 0 var(--progress-height);
  width: var(--progress-height);
  height: var(--progress-height);
  min-width: var(--progress-height);
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  line-height: 1;
  letter-spacing: 0;
  text-transform: none;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 8px 100%, 0 calc(100% - 8px));
}

/* Top-left L-streak on secondary */
.tech-btn__streak {
  position: absolute;
  top: 0;
  left: 0;
  width: 10px;
  height: 10px;
  pointer-events: none;
}
.tech-btn__streak::before,
.tech-btn__streak::after {
  content: '';
  position: absolute;
  background: var(--white);
}
.tech-btn__streak::before { top: 0; left: 0; width: 10px; height: 1.5px; }
.tech-btn__streak::after  { top: 0; left: 0; width: 1.5px; height: 10px; }

/* Bottom-right triangle on secondary */
.tech-btn__corner-tri {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 0 10px 10px;
  border-color: transparent transparent var(--white) transparent;
  pointer-events: none;
}

/* ─────────────────────────────────────────
   Shutter button — 72 × 72 solid white
   Outer ring: 1 px white-32, 4 px gap via outline-offset
───────────────────────────────────────── */

.shutter-button {
  width: var(--shutter-size);
  height: var(--shutter-size);
  border-radius: 50%;
  background: var(--white);
  border: none;
  outline: 1px solid var(--white-32);
  outline-offset: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0;
  position: relative;
  flex-shrink: 0;
}

.shutter-button::after { display: none; }

.shutter-button:active:not(:disabled) {
  transform: scale(0.9);
  background: rgba(255, 255, 255, 0.8);
}

.shutter-button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* ─────────────────────────────────────────
   Flip camera button — mobile / touch only
───────────────────────────────────────── */

.flip-spacer,
.flip-btn {
  /* Hidden on desktop (fine pointer / hover capable) */
  display: none;
}

@media (hover: none) and (pointer: coarse) {
  .flip-spacer {
    display: block;
    width: 54px;
    height: 54px;
    flex-shrink: 0;
  }

  .flip-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 54px;
    height: 54px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--white-32);
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.15s ease, transform 0.1s ease;
  }

  .flip-btn svg {
    width: 18px;
    height: 18px;
    filter: drop-shadow(0 0 4px rgba(255, 255, 255, 0.4));
  }

  .flip-btn:active {
    background: rgba(255, 255, 255, 0.18);
    transform: scale(0.92);
  }
}

/* ─────────────────────────────────────────
   Info / connection button (hidden, kept for JS compat)
───────────────────────────────────────── */

.connection-status {
  width: var(--status-size);
  height: var(--status-size);
  border-radius: 50%;
  background: var(--status-disconnected);
  position: absolute;
  top: 8px;
  right: 8px;
  transition: background 0.3s ease;
}

.connection-status.connected {
  background: var(--status-connected);
  box-shadow: 0 0 8px rgba(0, 255, 170, 0.6);
}

.tooltip {
  position: absolute;
  bottom: 60px;
  left: 0;
  background: rgba(0, 0, 0, 0.9);
  color: var(--white);
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.8rem;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease;
  z-index: 100;
  border: 1px solid var(--white-32);
}

/* ─────────────────────────────────────────
   Dot ripple canvas — overlays viewport during isolation loading
───────────────────────────────────────── */

.dot-ripple-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 10;
  pointer-events: none;
}

/* ─────────────────────────────────────────
   Isolate-mode controls — replaces shutter in controls-main
   Total height: 40px bar + 4px gap + 40px btn = 84px (= controls-main min-height)
───────────────────────────────────────── */

.isolate-controls {
  display: none;
  flex-direction: column;
  align-items: stretch;
  gap: 16px;
  flex: 1;
  min-width: 0;
}

.isolate-loader {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-width: 0;
}

.segments-track {
  display: flex;
  align-items: stretch;
  gap: 4px;
  flex: 1;
  height: 52px;
}

.seg {
  flex: 1;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 1px;
  transition: background 0.15s ease-out, box-shadow 0.15s ease-out;
}

.isolate-label {
  font-family: var(--font-kode-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.55);
  text-align: center;
  width: 100%;
}

/* 40 × 40 cancel — secondary style */
.tech-btn--cancel-sm {
  flex: none;
  width: 40px;
  height: 40px;
  min-width: 40px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 8px 100%, 0 calc(100% - 8px));
}

/* ─────────────────────────────────────────
   Generation progress bar (controls strip)
───────────────────────────────────────── */

.progress-bar {
  position: relative;
  width: 100%;
  height: var(--progress-height);
  background: var(--progress-bg);
  overflow: hidden;
}

.progress-fill {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  background: var(--progress-fill);
  width: 0%;
  transition: width 0.3s ease;
}

.progress-fill::after {
  content: '';
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: var(--progress-marker-width);
  height: 60%;
  background: var(--progress-marker-color);
}

.loading-text {
  position: relative;
  top: 8px;
  left: 0;
  right: 0;
  text-align: center;
  font-family: var(--font-kode-mono);
  font-size: var(--progress-text-size);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  pointer-events: none;
  z-index: 2;
}

.loading-text-dark  { color: rgba(0, 0, 0, 0.8); mix-blend-mode: multiply; }
.loading-text-light { color: rgba(255, 255, 255, 0.4); }

.spinner { display: none; }

/* ─────────────────────────────────────────
   Send to Blender accent button
───────────────────────────────────────── */

.btn-accent {
  width: var(--shutter-size);
  height: var(--shutter-size);
  border-radius: 50%;
  background: var(--accent);
  border: 4px solid var(--accent-glow);
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  flex-shrink: 0;
}

.btn-accent:active:not(:disabled) {
  transform: scale(0.9);
  background: var(--accent-dim);
  box-shadow: 0 0 24px var(--accent-glow);
}

.btn-accent:disabled { opacity: 0.3; cursor: not-allowed; }

/* ─────────────────────────────────────────
   Responsive
───────────────────────────────────────── */

@media (max-width: 480px) {
  .controls-main {
    gap: var(--controls-gap-mobile);
  }

  .tech-btn {
    height: 44px;
    font-size: 12px;
    padding: 0 10px;
  }

  .tech-btn__content { gap: 10px; }
  .tech-btn__bracket { width: 6px; height: 16px; }
  .tech-btn__arrow   { width: 6px; height: 8px; }

  .generation-progress .progress-bar {
    height: var(--progress-height-mobile);
  }

  .tech-btn.tech-btn--cancel {
    flex: 0 0 var(--progress-height-mobile);
    width: var(--progress-height-mobile);
    height: var(--progress-height-mobile);
    min-width: var(--progress-height-mobile);
    font-size: 0.75rem;
  }

  .progress-bar    { height: var(--progress-height-mobile); }
  .loading-text    { font-size: var(--progress-text-size-mobile); }
  .segments-track  { height: 40px; }
}