/* ─── RESET / BASE ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; overflow: hidden; }

body {
  background: #0a0a0a;
  color: #e0e0e0;
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 13px;
  line-height: 1.4;
}

button {
  cursor: pointer;
  font-family: inherit;
  font-size: 11px;
  background: #1e1e1e;
  color: #ccc;
  border: 1px solid #383838;
  border-radius: 4px;
  padding: 5px 10px;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  white-space: nowrap;
}
button:hover:not(:disabled) { background: #2a2a2a; color: #fff; }
button:disabled { opacity: 0.3; cursor: not-allowed; }

input, select {
  font-family: inherit;
  font-size: 12px;
  background: #1a1a1a;
  color: #e0e0e0;
  border: 1px solid #383838;
  border-radius: 4px;
  padding: 6px 8px;
  outline: none;
  width: 100%;
  transition: border-color 0.15s;
}
input:focus, select:focus { border-color: #e63946; }
input[readonly] { color: #666; cursor: default; background: #111; }
input::placeholder { color: #383838; }
input.source-exif   { color: #e63946; }
input.source-db     { color: #c47f2a; }
input.source-manual { color: #5b8def; }
input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }
input[type=number] { -moz-appearance: textfield; appearance: textfield; }
select { cursor: pointer; }
select option, select optgroup { background: #1a1a1a; color: #e0e0e0; }

/* ─── APP LAYOUT ────────────────────────────────────────────── */
#app {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

#image-panel {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  border-right: 1px solid #2a2a2a;
}

#controls-panel {
  width: 520px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ─── PANEL HEADER ──────────────────────────────────────────── */
.panel-header {
  height: 60px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #2a2a2a;
  flex-shrink: 0;
  gap: 12px;
}

.brand {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.3px;
  color: #e0e0e0;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 7px;
}
.brand-accent { color: #e63946; }
.brand-logo { width: 22px; height: 22px; flex-shrink: 0; }

.panel-title {
  font-size: 13px;
  font-weight: 600;
  color: #666;
  letter-spacing: 0.3px;
  user-select: none;
}

.toolbar { display: flex; align-items: center; gap: 8px; }

.icon-btn {
  background: transparent;
  border: 1px solid #2a2a2a;
  border-radius: 4px;
  width: 28px;
  height: 28px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: #666;
  flex-shrink: 0;
}
.icon-btn:hover:not(:disabled) { background: #1e1e1e; color: #ccc; border-color: #383838; }
a.icon-btn { text-decoration: none; }

.header-actions { display: flex; align-items: center; gap: 8px; }

/* ─── STEP BAR ──────────────────────────────────────────────── */
#step-bar {
  height: 38px;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #2a2a2a;
  background: #0d0d0d;
  flex-shrink: 0;
}
.step-chain {
  display: flex;
  align-items: center;
  gap: 5px;
  flex: 1;
}

.step-node {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border-radius: 20px;
  border: 1px solid #1e1e1e;
  font-size: 11px;
  color: #2e2e2e;
  white-space: nowrap;
  user-select: none;
  transition: color 0.3s, border-color 0.3s, background 0.3s, box-shadow 0.3s;
}

.step-node.done {
  color: #484848;
  border-color: #2a2a2a;
}

.step-node.active {
  color: #e63946;
  border-color: rgba(230, 57, 70, 0.45);
  background: rgba(230, 57, 70, 0.08);
  animation: step-glow 1.8s ease-in-out infinite;
}

.step-icon { font-size: 9px; font-weight: 700; }
.step-icon::before       { content: attr(data-n); }
.step-node.done .step-icon::before { content: '✓'; }
.step-label { display: none; }
.step-node.active .step-label { display: inline; }

.step-connector { font-size: 10px; color: #222; flex-shrink: 0; letter-spacing: -1px; }
.step-val {
  font-size: 12px;
  font-weight: 700;
  color: #e63946;
  font-variant-numeric: tabular-nums;
}

/* ─── IMAGE CONTAINER ───────────────────────────────────────── */
#image-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: #111;
  cursor: crosshair;
  min-height: 0;
}

#image-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.zoom-hint {
  position: absolute;
  bottom: 10px;
  left: 12px;
  font-size: 10px;
  color: #888;
  background: rgba(10, 10, 10, 0.72);
  border: 1px solid #2a2a2a;
  border-radius: 20px;
  padding: 4px 11px;
  letter-spacing: 0.3px;
  user-select: none;
  pointer-events: none;
  z-index: 5;
}

/* ─── DROP OVERLAY ──────────────────────────────────────────── */
#drop-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #111;
  cursor: pointer;
  z-index: 10;
  transition: background 0.15s;
}
#drop-overlay.hidden { display: none; }
#drop-overlay.drag-active { background: #1a0a0b; }

.drop-inner { text-align: center; pointer-events: none; }
.drop-icon {
  display: block;
  width: 64px;
  margin: 0 auto 14px;
  opacity: 0.45;
  animation: spin 12s linear infinite;
}
.drop-icon svg { display: block; width: 100%; height: auto; }
.drop-msg {
  font-size: 15px;
  font-weight: 500;
  color: #4a4a4a;
  line-height: 2;
}
.drop-msg span { font-size: 11px; color: #333; }
#file-input { display: none; }

/* ─── EXIF BAR ──────────────────────────────────────────────── */
#exif-bar {
  height: 38px;
  display: flex;
  border-bottom: 1px solid #2a2a2a;
  background: #0d0d0d;
  flex-shrink: 0;
}

.exif-cell {
  flex: 1;
  min-width: 0;
  padding: 0 10px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-right: 1px solid #1a1a1a;
}
.exif-cell:last-child { border-right: none; }

.exif-lbl {
  font-size: 9px;
  color: #888;
  text-transform: uppercase;
  letter-spacing: 0.7px;
  margin-bottom: 3px;
  user-select: none;
}
.exif-val {
  font-size: 11px;
  color: #555;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 0.2s;
}
.exif-val.has-data { color: #ccc; }
.exif-sub { font-size: 9px; color: #555; margin-top: 1px; }
#exif-gps-val.clickable {
  color: #e63946;
  cursor: pointer;
  text-decoration: underline;
  text-decoration-style: dotted;
  text-underline-offset: 2px;
}

/* ─── CAMERA OBSCURA DIAGRAM ────────────────────────────────── */
#diagram-wrap {
  padding: 10px 16px 6px;
  border-bottom: 1px solid #1a1a1a;
  background: #080808;
  flex-shrink: 0;
}

#diagram-svg {
  display: block;
  width: 100%;
  height: auto;
}

#diagram-svg .seg {
  stroke: #333;
  stroke-width: 2;
  stroke-linecap: round;
  fill: none;
  transition: stroke 0.4s ease, opacity 0.4s ease;
}
#diagram-svg .seg.dashed   { stroke-dasharray: 5 4; }
#diagram-svg .seg.ray      { stroke: #2a2a2a; stroke-width: 1; }
#diagram-svg .seg.dot      { fill: #333; stroke: none; transition: fill 0.4s ease; }
#diagram-svg .seg.px-mark  { stroke-width: 5; opacity: 0.35; }

#diagram-svg .seg.lit                { stroke: #e63946; opacity: 1; }
#diagram-svg .seg.ray.lit            { stroke: #e63946; opacity: 0.25; }
#diagram-svg .seg.dot.lit            { fill: #e63946; stroke: none; }
#diagram-svg .seg.px-mark.lit        { stroke: #e63946; opacity: 0.85; }

.diag-lbl {
  fill: #5a5a5a;
  font-size: 13px;
  font-family: system-ui, sans-serif;
  transition: fill 0.4s ease;
  user-select: none;
}
.diag-lbl.lit  { fill: #e63946; }
.diag-result   { fill: #e63946; font-weight: 600; }

/* ─── INPUTS SECTION ────────────────────────────────────────── */
#inputs-section {
  flex-shrink: 0;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.field-label {
  font-size: 10px;
  color: #999;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  user-select: none;
}
.field-source {
  font-size: 10px;
  color: #e63946;
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
}
.field-source.source-db     { color: #c47f2a; }
.field-source.source-manual { color: #5b8def; }

.src-badge {
  font-size: 9px;
  font-weight: 400;
  color: #2e2e2e;
  text-transform: none;
  letter-spacing: 0;
  margin-left: 3px;
  transition: color 0.25s;
}
#src-exif.active   { color: #e63946; }
#src-db.active     { color: #c47f2a; }
#src-custom.active { color: #5b8def; }

.input-row {
  display: flex;
  gap: 5px;
  align-items: stretch;
}

.labeled-input {
  position: relative;
  display: flex;
  align-items: center;
  flex: 1;
  min-width: 0;
}
.labeled-input input {
  padding-right: 34px;
}
.unit-tag {
  position: absolute;
  right: 8px;
  font-size: 9px;
  color: #888;
  font-weight: 600;
  letter-spacing: 0.4px;
  pointer-events: none;
  user-select: none;
  text-transform: uppercase;
}

/* ─── CUSTOM CAMERA DROPDOWN ─────────────────────────────────── */
#camera-trigger {
  width: 100%;
  text-align: left;
  font-size: 12px;
  color: #666;
  background: #1a1a1a;
  border: 1px solid #383838;
  border-radius: 4px;
  padding: 6px 8px;
  margin-bottom: 2px;
  height: auto;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
#camera-trigger:hover:not(:disabled) { background: #222; color: #ccc; border-color: #484848; }
#camera-trigger.has-selection { color: #e0e0e0; }

#camera-panel {
  position: fixed;
  background: #1a1a1a;
  border: 1px solid #383838;
  border-radius: 4px;
  z-index: 5000;
  max-height: 320px;
  overflow-y: auto;
  display: none;
  box-shadow: 0 8px 24px rgba(0,0,0,0.75);
}
#camera-panel.open { display: block; }

#cam-filter {
  position: sticky;
  top: 0;
  display: block;
  width: 100%;
  box-sizing: border-box;
  padding: 7px 12px;
  background: #141414;
  border: none;
  border-bottom: 1px solid #2a2a2a;
  color: #ccc;
  font-size: 11px;
  font-family: inherit;
  outline: none;
  z-index: 1;
}
#cam-filter::placeholder { color: #444; }

.cam-custom {
  padding: 7px 12px;
  font-size: 11px;
  color: #888;
  cursor: pointer;
  border-bottom: 1px solid #252525;
  user-select: none;
}
.cam-custom:hover { background: #222; color: #ccc; }
.cam-custom.selected { color: #e63946; }

.cam-category-hdr {
  padding: 7px 12px 3px;
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: #e63946;
  font-weight: 600;
  border-top: 1px solid #1e1e1e;
}
.cam-brand { border-bottom: 1px solid #202020; }
.cam-brand:last-child { border-bottom: none; }

.cam-brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 12px;
  font-size: 11px;
  color: #888;
  cursor: pointer;
  user-select: none;
}
.cam-brand-row:hover { background: #1e1e1e; color: #ccc; }
.cam-brand.open > .cam-brand-row { color: #ccc; background: #1c1c1c; }

.cam-arrow { font-size: 11px; color: #666; transition: transform 0.18s ease; flex-shrink: 0; }
.cam-brand.open > .cam-brand-row .cam-arrow { transform: rotate(90deg); color: #888; }

.cam-models { display: none; background: #131313; }
.cam-brand.open > .cam-models { display: block; }

.cam-model {
  padding: 6px 14px 6px 24px;
  font-size: 11px;
  color: #888;
  cursor: pointer;
  user-select: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}
.cam-model:hover { background: #1a1a1a; color: #ccc; }
.cam-model.selected { color: #e63946; }

.cam-conf {
  font-size: 9px;
  flex-shrink: 0;
  letter-spacing: 0.03em;
}
.cam-conf--ok      { color: #5a8f57; }
.cam-conf--inferred,
.cam-conf--unknown  { color: #666; }

/* ─── RESULT BAR ────────────────────────────────────────────── */
#result-bar {
  padding: 5px 16px;
  border-top: 1px solid #2a2a2a;
  background: #0a0a0a;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 14px;
}
#result-main {
  flex: 1;
  min-width: 0;
  text-align: center;
}
.result-divider {
  width: 1px;
  align-self: stretch;
  background: #2a2a2a;
  flex-shrink: 0;
}
.result-label {
  font-size: 9px;
  color: #666;
  text-transform: uppercase;
  letter-spacing: 0.7px;
  margin-bottom: 1px;
  user-select: none;
}
.result-display {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 5px;
}
#result-value {
  font-size: 30px;
  font-weight: 700;
  color: #444;
  letter-spacing: -1.5px;
  font-variant-numeric: tabular-nums;
  transition: color 0.35s;
  line-height: 1;
}
#result-bar.has-result #result-value { color: #e63946; }

.result-unit {
  font-size: 16px;
  color: #444;
  font-weight: 400;
  transition: color 0.35s;
}
#result-bar.has-result .result-unit { color: #aaa; }

#result-eq {
  font-size: 9px;
  color: #555;
  margin-top: 3px;
  font-variant-numeric: tabular-nums;
  min-height: 12px;
  font-family: monospace;
  transition: color 0.35s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
#result-bar.has-result #result-eq { color: #888; }

/* ─── MAP SECTION (always visible) ─────────────────────────── */
#map-section {
  flex: 1;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  border-top: 1px solid #2a2a2a;
}

#map-header {
  height: 30px;
  padding: 0 8px 0 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: #0f0f0f;
  border-bottom: 1px solid #1e1e1e;
  flex-shrink: 0;
}
.map-dist-label { font-size: 10px; color: #888; text-transform: uppercase; letter-spacing: 0.5px; flex-shrink: 0; }
#map-dist-val { font-size: 13px; color: #aaa; font-weight: 600; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#map-dist-val.map-prompt-active {
  color: #e63946;
  animation: prompt-pulse 1.8s ease-in-out infinite;
}
@keyframes prompt-pulse {
  0%, 100% { opacity: 0.6; }
  50%      { opacity: 1; }
}

#map-tile-btns { display: flex; gap: 3px; }
.tile-btn { font-size: 9px; padding: 2px 7px; height: 20px; }
.tile-btn.active-tile { border-color: #e63946; color: #e63946; background: #1a0a0b; }

/* ─── SOLVE MODE TOGGLE (stacked, in result bar) ────────────── */
#solve-toggle {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
  width: 112px;
}
.solve-btn {
  width: 94px;
  height: 22px;
  padding: 0;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  background: transparent;
  border: 1px solid #2a2a2a;
  color: #888;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}
.solve-btn:hover { background: #1e1e1e; color: #ccc; border-color: #383838; }
.solve-btn.active-solve { border-color: #e63946; color: #e63946; background: #1a0a0b; }

/* Awaited-control glow — mirrors the active step indicator */
#camera-trigger.awaiting,
#pixel-span-input.awaiting,
#distance-input.awaiting,
#known-size-input.awaiting {
  border-color: #e63946;
  animation: input-glow 1.8s ease-in-out infinite;
}
@keyframes input-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(230, 57, 70, 0); }
  50%      { box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.22); }
}

#map-coord-row {
  height: 26px;
  padding: 0 8px 0 14px;
  display: flex;
  align-items: center;
  background: #0a0a0a;
  border-bottom: 1px solid #1a1a1a;
  flex-shrink: 0;
}
#coord-input {
  flex: 1;
  background: transparent;
  border: none;
  border-radius: 0;
  font-size: 11px;
  color: #888;
  padding: 0;
  width: 100%;
}
#coord-input:focus { border-color: transparent; color: #ccc; }
#coord-input::placeholder { color: #555; }

#map-container { flex: 1; min-height: 0; background: #1a1a1a; }

/* ─── TOAST ─────────────────────────────────────────────────── */
#toast-container {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  display: flex;
  flex-direction: column;
  z-index: 9999;
  pointer-events: none;
}
.toast-item {
  background: #3d0808;
  color: #ff9999;
  border-top: 1px solid #ff3333;
  padding: 6px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  gap: 12px;
  transform: translateY(100%);
  transition: transform 0.25s ease, opacity 0.4s ease;
  pointer-events: all;
}
.toast-item.toast-visible { transform: translateY(0); }
.toast-item.toast-hiding  { opacity: 0; }
.toast-item.toast-success { background: #0d2e1a; color: #a0dbb8; border-top-color: #4caf7d; }
.toast-close {
  background: none; border: none; color: inherit;
  font-size: 16px; cursor: pointer; padding: 0 4px; flex-shrink: 0;
}

/* ─── HELP OVERLAY ──────────────────────────────────────────── */
#help-card {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  z-index: 8000;
  display: flex;
  align-items: center;
  justify-content: center;
}
.help-inner {
  background: #151515;
  border: 1px solid #2a2a2a;
  border-top: 3px solid #e63946;
  border-radius: 8px;
  padding: 24px;
  width: 680px;
  max-width: 92vw;
}
.help-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
  font-size: 14px;
  font-weight: 600;
  color: #e0e0e0;
}
.help-steps {
  padding-left: 18px;
  display: flex;
  flex-direction: column;
  gap: 9px;
  font-size: 12px;
  color: #999;
  line-height: 1.6;
}
.help-steps li::marker { color: #e63946; }

.help-formulas {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-top: 16px;
}
.help-formula {
  padding: 10px 14px;
  background: #0f0f0f;
  border: 1px solid #1e1e1e;
  border-left: 3px solid rgba(230, 57, 70, 0.45);
  border-radius: 4px;
  font-size: 11px;
  color: #555;
}
.help-formula-label {
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: #e63946;
  margin-bottom: 6px;
  font-weight: 600;
}
.help-formula code { color: #888; font-size: 11px; }
.help-legend {
  border-collapse: collapse;
  margin: 12px auto 0;
  font-size: 11px;
}
.help-legend td { padding: 2px 8px 2px 0; color: #555; }
.help-legend td:nth-child(even) { padding-right: 28px; }
.help-legend td:nth-child(odd) { color: #888; font-family: monospace; white-space: nowrap; }
.help-formula-note {
  margin-top: 10px;
  font-size: 11px;
  color: #c8828a;
  line-height: 1.6;
  background: rgba(230, 57, 70, 0.08);
  border: 1px solid rgba(230, 57, 70, 0.25);
  border-left: 3px solid #e63946;
  border-radius: 4px;
  padding: 10px 14px;
}
.help-shortcuts {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px 16px;
  margin-top: 16px;
  font-size: 12px;
  color: #777;
  flex-wrap: wrap;
}
kbd {
  background: rgba(230, 57, 70, 0.07);
  border: 1px solid rgba(230, 57, 70, 0.3);
  border-radius: 3px;
  padding: 2px 8px;
  font-size: 11px;
  color: #e63946;
  font-family: system-ui;
  font-weight: 600;
}

/* ─── LEAFLET OVERRIDES ─────────────────────────────────────── */
.leaflet-container { background: #1a1a1a; }
.leaflet-control-zoom a { background: #1e1e1e !important; color: #aaa !important; border-color: #383838 !important; }
.leaflet-control-zoom a:hover { background: #2a2a2a !important; color: #fff !important; }
.leaflet-control-attribution { background: rgba(10,10,10,0.7) !important; color: #444 !important; font-size: 9px !important; }
.leaflet-control-attribution a { color: #555 !important; }
#map-container { cursor: crosshair !important; }

/* GPS marker pulse */
@keyframes gps-pulse {
  0%, 100% { opacity: 0.9; }
  50%       { opacity: 0.15; }
}
.gps-pulse-marker { animation: gps-pulse 2s ease-in-out infinite; }

/* ─── ANIMATIONS ────────────────────────────────────────────── */
@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
@keyframes step-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(230, 57, 70, 0); }
  50%       { box-shadow: 0 0 8px 3px rgba(230, 57, 70, 0.3); }
}