:root {
  --color-bg: #0d0d0d;
  --color-fg: #e8e8e8;
  --color-1: #c0392b;
  --color-2: #2980b9;
  --color-3: #27ae60;

  --font-mono: "Courier New", Courier, monospace;
}

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

html {
  font-size: 16px;
}

body {
  background-color: var(--color-bg);
  color: var(--color-fg);
  font-family: var(--font-mono);
  line-height: 1.6;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.layout {
  display: flex;
  align-items: flex-start;
  gap: 2.5rem;
}

.sidebar {
  flex: 0 0 260px;
}

.content {
  flex: 1 1 auto;
  min-width: 0;
}

@media (max-width: 700px) {
  .layout {
    flex-direction: column;
  }
  .sidebar {
    flex: 1 1 auto;
    width: 100%;
  }
}

/* Before a file is loaded, there's nothing yet for a second column to show —
   collapse to one column, title + subtitle inline, and let the file panel
   dominate. Toggled by app.js/browser_sam.js via updateLayoutMode(). */
.layout.single-column {
  flex-direction: column;
}
.layout.single-column .sidebar {
  flex: 1 1 auto;
  width: 100%;
}
.layout.single-column .header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
}
.layout.single-column .header h1,
.layout.single-column .header .sub {
  margin: 0;
}
.layout.single-column #upload-form,
.layout.single-column #browser-form {
  min-height: 55vh;
  justify-content: center;
  padding: 3rem;
}

h1 {
  margin: 0 0 0.25rem;
  font-weight: bold;
  letter-spacing: 0.02em;
}

h2 {
  margin: 0 0 0.5rem;
  font-weight: bold;
  border-bottom: 2px solid var(--color-fg);
  padding-bottom: 0.35rem;
}

.sub {
  color: color-mix(in srgb, var(--color-fg) 65%, var(--color-bg));
  margin: 0 0 1.5rem;
}

#mode-toggle {
  margin: 1.5rem 0;
  padding: 0.85rem 1rem;
  border: 2px solid var(--color-fg);
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}
#mode-toggle legend {
  color: color-mix(in srgb, var(--color-fg) 65%, var(--color-bg));
  font-size: 0.85rem;
  padding: 0 0.35rem;
}
#mode-toggle label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
}
#mode-toggle input[type="radio"] {
  accent-color: var(--color-2);
  width: auto;
}

.billing-panel {
  margin: 1.5rem 0;
  padding: 1rem;
  border: 2px solid var(--color-2);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.billing-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.billing-row label {
  font-size: 0.9rem;
}
.billing-row input[type="text"] {
  flex: 1;
  min-width: 220px;
  background: var(--color-bg);
  color: var(--color-fg);
  border: 1px solid var(--color-fg);
  padding: 0.45rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}
.billing-buy {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  font-size: 0.9rem;
}
.billing-buy button {
  background: var(--color-2);
  border-color: var(--color-2);
}
.billing-buy button:hover:not(:disabled) { background: var(--color-bg); color: var(--color-2); }

#upload-form, #browser-form {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
  padding: 1rem;
  border: 2px solid var(--color-fg);
}

.dropzone {
  border-style: dashed;
  transition: border-color 0.15s, background-color 0.15s;
}
.dropzone.drag-over {
  border-color: var(--color-2);
  background-color: color-mix(in srgb, var(--color-2) 12%, transparent);
}
.dropzone .hint {
  color: color-mix(in srgb, var(--color-fg) 65%, var(--color-bg));
  font-size: 0.85rem;
}

.settings-panel {
  margin: 1.5rem 0 1rem;
  border: 2px solid var(--color-fg);
}
.settings-panel summary {
  cursor: pointer;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  color: color-mix(in srgb, var(--color-fg) 65%, var(--color-bg));
  list-style: none;
}
.settings-panel summary::-webkit-details-marker { display: none; }
.settings-panel summary::before {
  content: "+ ";
  color: var(--color-fg);
}
.settings-panel[open] summary::before {
  content: "− ";
}
.settings-panel[open] summary {
  border-bottom: 2px solid var(--color-fg);
}

.settings-grid {
  display: grid;
  grid-template-columns: 1fr;
  row-gap: 0.4rem;
  padding: 1rem;
}
.settings-grid label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  margin-top: 0.75rem;
}
.settings-grid label:first-child {
  margin-top: 0;
}
.settings-grid select,
.settings-grid input[type="number"] {
  background: var(--color-bg);
  color: var(--color-fg);
  border: 1px solid var(--color-fg);
  padding: 0.45rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  width: 100%;
}
.settings-grid input[type="number"] {
  width: 6rem;
}
.control-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.control-row input[type="range"] {
  flex: 1;
  min-width: 0;
  accent-color: var(--color-2);
}
.control-row .value {
  min-width: 3.5rem;
  text-align: right;
  font-size: 0.9rem;
  color: color-mix(in srgb, var(--color-fg) 65%, var(--color-bg));
}

.toolbar {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
  margin: 1rem 0;
}

.info {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.1rem;
  height: 1.1rem;
  border: 1px solid var(--color-fg);
  border-radius: 50%;
  font-size: 0.7rem;
  line-height: 1;
  cursor: help;
  position: relative;
  flex-shrink: 0;
}
.info:hover, .info:focus {
  background: var(--color-fg);
  color: var(--color-bg);
  outline: none;
}
.info:hover::after, .info:focus::after {
  content: attr(data-tip);
  position: absolute;
  bottom: 140%;
  left: 50%;
  transform: translateX(-50%);
  width: max-content;
  max-width: 240px;
  background: var(--color-bg);
  color: var(--color-fg);
  border: 2px solid var(--color-fg);
  padding: 0.5rem 0.6rem;
  font-size: 0.75rem;
  line-height: 1.4;
  white-space: normal;
  text-align: left;
  z-index: 10;
}

.candidate-picker { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1rem; }
.candidate-picker button {
  background: var(--color-bg);
  color: var(--color-fg);
  border: 2px solid var(--color-fg);
  padding: 0.4rem 0.7rem;
  font-size: 0.85rem;
}
.candidate-picker button.selected {
  background: var(--color-2);
  border-color: var(--color-2);
  color: var(--color-fg);
}

#browser-canvas {
  max-width: 100%;
  height: auto;
  border: 2px solid var(--color-fg);
  display: block;
  cursor: crosshair;
}
#browser-canvas[hidden] {
  display: none;
}

input[type="file"] {
  color: var(--color-fg);
  flex: 1;
  min-width: 200px;
  font-family: var(--font-mono);
}

button {
  background: var(--color-1);
  border: 2px solid var(--color-1);
  color: var(--color-fg);
  padding: 0.55rem 1.1rem;
  font-size: 0.95rem;
  font-family: var(--font-mono);
  cursor: pointer;
}
button:disabled { opacity: 0.45; cursor: default; }
button:hover:not(:disabled) { background: var(--color-bg); color: var(--color-1); }

.status {
  margin-top: 1rem;
  color: color-mix(in srgb, var(--color-fg) 65%, var(--color-bg));
}

#results { margin-top: 2rem; }

#preview {
  max-width: 100%;
  max-height: 360px;
  border: 2px solid var(--color-fg);
  display: block;
  cursor: zoom-in;
}

dialog.modal {
  width: 100vw;
  height: 100vh;
  max-width: 100vw;
  max-height: 100vh;
  margin: 0;
  padding: 2rem;
  border: none;
  background: transparent;
}
dialog.modal[open] {
  display: flex;
  align-items: center;
  justify-content: center;
}
dialog.modal::backdrop {
  background: rgba(0, 0, 0, 0.85);
}
dialog.modal img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border: 2px solid var(--color-fg);
}
.modal-close {
  position: fixed;
  top: 1.25rem;
  right: 1.5rem;
  width: 2.5rem;
  height: 2.5rem;
  background: transparent;
  border: 2px solid var(--color-fg);
  color: var(--color-fg);
  font-size: 1.25rem;
  line-height: 1;
  padding: 0;
}
.modal-close:hover { background: var(--color-fg); color: var(--color-bg); }

.results-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.mask-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
  margin-bottom: 1.5rem;
}

.mask-card {
  border: 2px solid var(--color-fg);
  padding: 0.75rem;
  text-align: center;
}

.mask-card .thumb {
  width: 100%;
  height: 130px;
  object-fit: contain;
  /* checkerboard so transparency is visible */
  background-image:
    linear-gradient(45deg, #2a2a2a 25%, transparent 25%),
    linear-gradient(-45deg, #2a2a2a 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #2a2a2a 75%),
    linear-gradient(-45deg, transparent 75%, #2a2a2a 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
}

.mask-card a {
  display: inline-block;
  margin-top: 0.5rem;
  color: var(--color-2);
  text-decoration: none;
  font-size: 0.9rem;
}
.mask-card a:hover { text-decoration: underline; }
.mask-card.pending a { pointer-events: none; opacity: 0.35; }
.mask-card.current {
  border-color: var(--color-2);
  border-style: dashed;
}
.mask-card .meta {
  color: color-mix(in srgb, var(--color-fg) 65%, var(--color-bg));
  font-size: 0.8rem;
  margin-top: 0.25rem;
}

@media (max-width: 767px) {
  button { min-height: 44px; }
}