/* ============================================================
   Dual Camera Comparison Viewer — styles.css
   Daedalus Arts Incubator Demonstration Series
   Design: Dark instrument aesthetic, teal accents, Inter type
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Reset & Base ─────────────────────────────────────────── */

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

:root {
  --bg:           #0c0c0e;
  --surface:      #141418;
  --panel:        #1a1a1f;
  --border:       #2a2a32;
  --border-light: #36363f;

  --text:         #e8e8ec;
  --text-muted:   #888898;
  --text-dim:     #4a4a58;

  --accent:       #2dd4bf;
  --accent-dim:   rgba(45, 212, 191, 0.15);
  --accent-glow:  rgba(45, 212, 191, 0.35);

  --label-a:      #60a5fa;   /* blue for A panel */
  --label-b:      #f472b6;   /* pink for B panel */
  --label-a-dim:  rgba(96, 165, 250, 0.12);
  --label-b-dim:  rgba(244, 114, 182, 0.12);

  --warn:         #fbbf24;
  --danger:       #f87171;

  --toolbar-h:    52px;
  --navstrip-h:   44px;
  --meta-h:       300px;
  --font:         'Inter', system-ui, sans-serif;
  --mono:         'JetBrains Mono', 'Courier New', monospace;

  --radius:       6px;
  --radius-sm:    4px;
  --trans:        150ms ease;
}

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 13px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ── Layout Scaffold ──────────────────────────────────────── */

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* ── Toolbar ──────────────────────────────────────────────── */

#toolbar {
  flex: 0 0 var(--toolbar-h);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 12px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  user-select: none;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
}
#toolbar::-webkit-scrollbar { display: none; }

.toolbar-sep {
  width: 1px;
  height: 22px;
  background: var(--border);
  margin: 0 4px;
  flex-shrink: 0;
}

.toolbar-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  white-space: nowrap;
  flex-shrink: 0;
}

/* ── Buttons ──────────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--trans), border-color var(--trans), background var(--trans);
  flex-shrink: 0;
}
.btn:hover { color: var(--text); border-color: var(--border-light); }

.btn.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}
.btn.active:hover { background: rgba(45,212,191,0.22); }

.btn.link-btn.active { box-shadow: 0 0 0 1px var(--accent-glow); }

.btn-icon {
  padding: 5px 7px;
  font-size: 14px;
}

/* Mode group */
.mode-group { display: flex; gap: 2px; flex-shrink: 0; }
.mode-group .btn { border-radius: 0; }
.mode-group .btn:first-child { border-radius: var(--radius-sm) 0 0 var(--radius-sm); }
.mode-group .btn:last-child  { border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }

/* Folder load buttons */
.btn-load-a { color: var(--label-a); border-color: rgba(96,165,250,0.3); }
.btn-load-a:hover { background: var(--label-a-dim); border-color: var(--label-a); }
.btn-load-b { color: var(--label-b); border-color: rgba(244,114,182,0.3); }
.btn-load-b:hover { background: var(--label-b-dim); border-color: var(--label-b); }

/* Blink interval select */
#blink-interval {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 12px;
  padding: 4px 6px;
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color var(--trans), color var(--trans);
}
#blink-interval:hover { border-color: var(--border-light); color: var(--text); }

/* ── Main Content Area ────────────────────────────────────── */

#main {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}

/* ── Viewer Row ───────────────────────────────────────────── */

#viewer {
  flex: 1 1 0;
  display: flex;
  overflow: hidden;
  min-height: 0;
  position: relative;
}

/* ── Panel ────────────────────────────────────────────────── */

.panel {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
  position: relative;
  background: var(--panel);
}

.panel + .panel { border-left: 2px solid var(--border); }

/* Panel focused ring */
.panel.focused { outline: none; }
.panel.focused .image-viewport { box-shadow: inset 0 0 0 2px var(--accent-glow); }

/* Panel label badge */
.panel-label {
  position: absolute;
  top: 10px;
  left: 14px;
  z-index: 10;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: 6px;
}
.panel-label .badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px; height: 22px;
  border-radius: 50%;
  font-size: 11px;
  font-weight: 700;
}
#panel-a .badge { background: var(--label-a-dim); color: var(--label-a); border: 1px solid rgba(96,165,250,0.4); }
#panel-b .badge { background: var(--label-b-dim); color: var(--label-b); border: 1px solid rgba(244,114,182,0.4); }

.panel-label .filename {
  font-size: 10px;
  font-weight: 400;
  color: var(--text-dim);
  font-family: var(--mono);
  max-width: 260px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Image Viewport ───────────────────────────────────────── */

.image-viewport {
  flex: 1 1 0;
  overflow: hidden;
  position: relative;
  cursor: crosshair;
  background: #0a0a0d;
  min-height: 0;
  transition: box-shadow var(--trans);
}
.image-viewport.grabbing { cursor: grabbing; }
.image-viewport.panning  { cursor: grab; }

.image-container {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform-origin: center center;
}

.panel-image {
  display: block;
  max-width: none;
  max-height: none;
  pointer-events: none;
  user-select: none;
  transition: image-rendering 0s;
}
.panel-image.pixelated { image-rendering: pixelated; image-rendering: crisp-edges; }

/* Empty state */
.empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  pointer-events: none;
}
.empty-state.hidden { display: none; }

.empty-icon {
  font-size: 40px;
  opacity: 0.2;
}
.empty-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-dim);
  letter-spacing: 0.03em;
}
.empty-hint {
  font-size: 11px;
  color: var(--text-dim);
  opacity: 0.6;
}

/* ── Navigation Strip ─────────────────────────────────────── */

.nav-strip {
  flex: 0 0 var(--navstrip-h);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 12px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  user-select: none;
}

.nav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 14px;
  cursor: pointer;
  transition: color var(--trans), border-color var(--trans), background var(--trans);
  flex-shrink: 0;
}
.nav-btn:hover { color: var(--text); border-color: var(--border-light); background: rgba(255,255,255,0.04); }
.nav-btn:disabled { opacity: 0.3; cursor: default; pointer-events: none; }

.nav-index-wrap {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}
.nav-index {
  width: 38px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--mono);
  font-size: 12px;
  text-align: center;
  padding: 3px 4px;
  transition: border-color var(--trans);
}
.nav-index:focus { outline: none; border-color: var(--accent); }
.nav-total {
  font-size: 11px;
  color: var(--text-dim);
  font-family: var(--mono);
}

.nav-spacer { flex: 1; }

/* Zoom / reset controls in nav strip */
.nav-zoom-input {
  width: 44px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--mono);
  font-size: 11px;
  text-align: center;
  padding: 3px 2px;
  transition: border-color var(--trans);
}
.nav-zoom-input:focus { outline: none; border-color: var(--accent); }

/* ── Metadata Section ─────────────────────────────────────── */

#metadata-row {
  flex: 0 0 var(--meta-h);
  display: flex;
  border-top: 2px solid var(--border);
  background: var(--surface);
  overflow: hidden;
}

.meta-panel {
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}
.meta-panel + .meta-panel { border-left: 1px solid var(--border); }

.meta-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.meta-header-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
#meta-a .meta-header-label { color: var(--label-a); }
#meta-b .meta-header-label { color: var(--label-b); }

.meta-header-cam {
  font-size: 11px;
  color: var(--text-muted);
  font-family: var(--mono);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.meta-toggle-all {
  font-size: 10px;
  color: var(--text-dim);
  cursor: pointer;
  padding: 2px 6px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  font-family: var(--font);
  transition: color var(--trans), border-color var(--trans);
  flex-shrink: 0;
}
.meta-toggle-all:hover { color: var(--text-muted); border-color: var(--border-light); }

.meta-body {
  flex: 1 1 0;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
  padding: 4px 0;
}
.meta-body::-webkit-scrollbar { width: 4px; }
.meta-body::-webkit-scrollbar-track { background: transparent; }
.meta-body::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* Metadata group */
.meta-group { border-bottom: 1px solid var(--border); }

.meta-group-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  cursor: pointer;
  user-select: none;
  transition: background var(--trans);
}
.meta-group-header:hover { background: rgba(255,255,255,0.03); }

.meta-group-chevron {
  font-size: 9px;
  color: var(--text-dim);
  transition: transform var(--trans);
  flex-shrink: 0;
}
.meta-group.open .meta-group-chevron { transform: rotate(90deg); }

.meta-group-name {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.meta-group-content {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 4px 20px;
  padding: 8px 12px 10px 24px;
}
.meta-group.open .meta-group-content { display: grid; }

.meta-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 3px 0;
  font-size: 12px;
  line-height: 1.5;
}
.meta-key {
  color: var(--text-muted);
  font-family: var(--mono);
  flex: 0 0 110px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.meta-val {
  color: var(--text);
  font-family: var(--mono);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.meta-val.highlight { color: var(--text); }
.meta-empty { font-size: 12px; color: var(--text-dim); padding: 6px 0; font-style: italic; grid-column: span 2; }

/* Sensor selector nested in camera row */
.meta-sensor-row {
  align-items: center;
}
.meta-sensor-select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 11px;
  padding: 2px 4px;
  cursor: pointer;
}
.meta-sensor-select:focus { outline: none; border-color: var(--accent); }

/* ── Blink overlay indicator ──────────────────────────────── */

.blink-indicator {
  position: absolute;
  top: 10px;
  right: 14px;
  z-index: 20;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--trans);
}
.blink-indicator.a { background: var(--label-a-dim); color: var(--label-a); border: 1px solid rgba(96,165,250,0.4); }
.blink-indicator.b { background: var(--label-b-dim); color: var(--label-b); border: 1px solid rgba(244,114,182,0.4); }
.blink-indicator.visible { opacity: 1; }

/* ── Mode visibility states ───────────────────────────────── */

/* a-only: hide panel-b viewer (but keep metadata) */
#app.mode-a-only #panel-b { display: none; }
#app.mode-b-only #panel-a { display: none; }

/* In blink mode, panels stack and visibility toggled via JS */
#app.mode-blink #panel-b { position: absolute; top: 0; left: 0; right: 0; bottom: 0; }
#app.mode-blink #panel-a { position: absolute; top: 0; left: 0; right: 0; bottom: 0; }

/* ── Scrollbar global ─────────────────────────────────────── */

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ── Utility ──────────────────────────────────────────────── */

.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ── Focus states for accessibility ──────────────────────── */

button:focus-visible, select:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

/* ── Micro-animations ─────────────────────────────────────── */

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.panel-image { animation: fadeIn 0.2s ease; }

/* Blink flash transition */
.image-viewport { transition: box-shadow var(--trans); }