:root {
  --ground: #0d0c0b;
  --panel: #181614;
  --edge: #2a2724;
  --ink: #f0ebe2;
  --muted: #8f877c;
  --amber: #e07a4b;
  --amber-ink: #1a0e07;
  --amber-wash: rgba(224, 122, 75, 0.09);
  --amber-edge: rgba(224, 122, 75, 0.35);
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}

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

html,
body {
  margin: 0;
  height: 100%;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: -20vh 0 auto;
  height: 90vh;
  background: radial-gradient(60% 55% at 50% 0%, rgba(224, 122, 75, 0.13), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

#app {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(280px, 360px) 1fr;
  height: 100vh;
  min-height: 600px;
}

.panel {
  border-right: 1px solid var(--edge);
  background: var(--panel);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.panel-header {
  padding: 1.25rem 1.5rem 1rem;
  border-bottom: 1px solid var(--edge);
}

.panel-header h1 {
  margin: 0;
  font-size: 0.75rem;
  font-family: var(--mono);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.panel-header p {
  margin: 0.35rem 0 0;
  font-size: 0.95rem;
  color: var(--ink);
}

.panel-body {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.readout {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--amber);
  min-height: 1rem;
}

.readout.muted {
  color: var(--muted);
}

.dropzone {
  border: 1px dashed var(--edge);
  border-radius: 4px;
  padding: 2rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.dropzone:hover,
.dropzone.dragover {
  border-color: var(--amber-edge);
  background: var(--amber-wash);
}

.dropzone p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.dropzone strong {
  color: var(--ink);
  font-weight: 500;
}

.hidden {
  display: none !important;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 9px;
  border: 1px solid var(--edge);
  border-radius: 4px;
  background: transparent;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.72rem;
  cursor: pointer;
}

.chip .marker {
  width: 6px;
  height: 6px;
  border-radius: 1px;
  border: 1px solid var(--edge);
  flex-shrink: 0;
}

.chip.selected {
  border-color: var(--amber-edge);
  background: var(--amber-wash);
  color: var(--amber);
}

.chip.selected .marker {
  background: var(--amber);
  border-color: var(--amber);
}

.notice {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.45;
}

.notice.error {
  color: #c96a5a;
}

.field-row {
  display: flex;
  gap: 6px;
}

.field-row input {
  flex: 1;
  background: transparent;
  border: 1px solid var(--edge);
  border-radius: 4px;
  padding: 8px 9px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 0.72rem;
}

.field-row input::placeholder {
  color: var(--muted);
}

.field-row input:focus {
  outline: none;
  border-color: var(--amber-edge);
}

.btn {
  border: none;
  border-radius: 4px;
  padding: 8px 12px;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--amber);
  color: var(--amber-ink);
}

.btn-primary:disabled {
  background: transparent;
  border: 1px solid var(--edge);
  color: var(--muted);
  cursor: default;
}

.btn-secondary {
  background: transparent;
  border: 1px solid var(--edge);
  color: var(--ink);
}

.btn-secondary:disabled {
  color: var(--muted);
  cursor: default;
}

.actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.viewer {
  position: relative;
  overflow: hidden;
  background: #080807;
  display: flex;
  flex-direction: column;
}

.viewer-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--edge);
  background: var(--panel);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

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

.compare-slider {
  width: 140px;
  accent-color: var(--amber);
}

.viewport {
  flex: 1;
  position: relative;
  overflow: hidden;
  cursor: grab;
}

.viewport.dragging {
  cursor: grabbing;
}

.viewport-inner {
  position: absolute;
  top: 50%;
  left: 50%;
  transform-origin: center center;
  will-change: transform;
}

.viewport img {
  display: block;
  max-width: none;
  user-select: none;
  pointer-events: none;
}

.compare-stack {
  position: relative;
}

.compare-stack .plate-layer {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.login-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(8, 8, 7, 0.92);
}

.login-card {
  width: min(360px, 90vw);
  padding: 2rem;
  background: var(--panel);
  border: 1px solid var(--edge);
  border-radius: 6px;
}

.login-card h2 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}

.login-card p {
  margin: 0 0 1.25rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.login-card input {
  width: 100%;
  margin-bottom: 0.75rem;
  background: transparent;
  border: 1px solid var(--edge);
  border-radius: 4px;
  padding: 10px 12px;
  color: var(--ink);
  font-size: 0.9rem;
}

.login-card input:focus {
  outline: none;
  border-color: var(--amber-edge);
}

.login-card .error {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  color: #c96a5a;
}

@media (max-width: 900px) {
  #app {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
    height: auto;
    min-height: 100vh;
  }

  .panel {
    border-right: none;
    border-bottom: 1px solid var(--edge);
    max-height: 45vh;
  }

  .viewer {
    min-height: 55vh;
  }
}