:root {
  --background: #fafafa;
  --card: #ffffff;
  --foreground: #0a0a0a;
  --muted-foreground: #737373;
  --border: #e5e5e5;
  --primary: #171717;
  --primary-foreground: #fafafa;
  --secondary: #f5f5f5;
  --ring: #a3a3a3;
  --sift: #059669;
  --sift-bg: #ecfdf5;
  --loftr: #d97706;
  --loftr-bg: #fffbeb;
  --template: #7c3aed;
  --template-bg: #f5f3ff;
  --destructive: #dc2626;
  --radius: 10px;
  --shadow-sm: 0 1px 2px rgb(0 0 0 / 0.04);
  --shadow-md: 0 1px 3px rgb(0 0 0 / 0.06), 0 4px 12px rgb(0 0 0 / 0.05);
}
:root[data-theme="dark"] {
  --background: #0a0a0a;
  --card: #161616;
  --foreground: #fafafa;
  --muted-foreground: #a3a3a3;
  --border: rgb(255 255 255 / 0.1);
  --primary: #ededed;
  --primary-foreground: #171717;
  --secondary: #262626;
  --ring: #525252;
  --sift: #34d399;
  --sift-bg: rgb(52 211 153 / 0.1);
  --loftr: #fbbf24;
  --loftr-bg: rgb(251 191 36 / 0.1);
  --template: #a78bfa;
  --template-bg: rgb(167 139 250 / 0.12);
  --destructive: #f87171;
  --shadow-sm: none;
  --shadow-md: none;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, -apple-system, "SF Pro Text", Inter, system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.55;
  background: var(--background);
  color: var(--foreground);
  -webkit-font-smoothing: antialiased;
}
.mono { font-family: ui-monospace, "SF Mono", SFMono-Regular, Menlo, monospace; }

.page { max-width: 680px; margin: 0 auto; padding: 28px 20px 80px; }

.topbar { display: flex; align-items: center; gap: 14px; margin-bottom: 26px; }
.topbar .spacer { flex: 1; }
.wordmark {
  display: flex; align-items: center; gap: 9px;
  font-size: 17px; font-weight: 650; letter-spacing: -0.02em;
  color: var(--foreground); text-decoration: none;
}
.back-link { color: var(--muted-foreground); text-decoration: none; font-size: 13.5px; }
.back-link:hover { color: var(--foreground); }
.theme-btn {
  width: 34px; height: 34px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--border); background: var(--card);
  color: var(--muted-foreground); display: grid; place-items: center; flex: none;
}
.theme-btn:hover { color: var(--foreground); background: var(--secondary); }
:root[data-theme="dark"] .icon-moon { display: none; }
:root:not([data-theme="dark"]) .icon-sun { display: none; }

.btn {
  display: inline-flex; align-items: center; gap: 7px;
  border-radius: 8px; padding: 9px 16px;
  font: inherit; font-size: 13.5px; font-weight: 550; text-decoration: none;
  cursor: pointer; border: 1px solid transparent;
  transition: opacity 0.15s, background 0.15s;
}
.btn.primary { background: var(--primary); color: var(--primary-foreground); }
.btn.primary:hover { opacity: 0.88; }
.btn.ghost { border-color: var(--border); color: var(--foreground); background: var(--card); }
.btn.ghost:hover { background: var(--secondary); }
.btn.sm { padding: 6px 12px; font-size: 12.5px; }
.link-btn {
  background: none; border: none; padding: 0; font: inherit; font-size: 12.5px;
  color: var(--muted-foreground); text-decoration: underline; cursor: pointer;
}
.link-btn:hover { color: var(--foreground); }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 20px;
  margin-bottom: 16px;
}
.card-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 4px; }
.step-no {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 11px; color: var(--muted-foreground);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 1px 6px; letter-spacing: 0.04em;
}
.card-title { font-size: 15px; font-weight: 600; letter-spacing: -0.01em; }
.card-desc { color: var(--muted-foreground); margin: 0 0 14px; }

.field-row { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.field-row label { font-size: 13px; color: var(--muted-foreground); }
select, input[type=text] {
  font: inherit; font-size: 13px; color: var(--foreground);
  background: var(--card); border: 1px solid var(--border);
  border-radius: 8px; padding: 7px 10px;
}

.dropzone {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 8px; padding: 26px 16px;
  border: 1.5px dashed var(--border);
  border-radius: calc(var(--radius) - 2px);
  cursor: pointer;
  color: var(--muted-foreground);
  transition: border-color 0.15s, background 0.15s;
  text-align: center;
}
.dropzone:hover, .dropzone.dragover { border-color: var(--ring); background: var(--secondary); }
.dropzone svg { opacity: 0.55; }
.dropzone .dz-hint { font-size: 13px; }
.dropzone .dz-hint b { color: var(--foreground); font-weight: 550; }
.dropzone.compact { flex-direction: row; padding: 14px 16px; }
input[type=file] { display: none; }
.dz-row { display: flex; gap: 10px; }
.dz-row .dropzone { flex: 1; }
/* devices with a mouse and no touch get the file dialog anyway — hide the camera button */
@media (hover: hover) and (pointer: fine) {
  .cam-only { display: none; }
}

.status { display: flex; align-items: center; gap: 8px; min-height: 20px;
          margin-top: 12px; color: var(--muted-foreground); font-size: 13px; }
.status.error { color: var(--destructive); }
.spinner {
  width: 13px; height: 13px; flex: none;
  border: 1.5px solid var(--border); border-top-color: var(--muted-foreground);
  border-radius: 50%; animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* project title */
.title-row { display: flex; align-items: center; gap: 8px; margin: 0 0 18px; }
#projName {
  font-size: 21px; font-weight: 650; letter-spacing: -0.02em;
  background: transparent; border: 1px solid transparent; border-radius: 8px;
  padding: 4px 8px; margin-left: -8px; color: var(--foreground);
  width: 100%; max-width: 420px;
}
#projName:hover { border-color: var(--border); }
#projName:focus { border-color: var(--ring); outline: none; background: var(--card); }
.save-note { font-size: 12px; color: var(--muted-foreground); min-width: 50px; }

/* uploaded-puzzle summary */
.summary { display: flex; gap: 14px; align-items: flex-start; }
.summary img { width: 132px; border-radius: 8px; border: 1px solid var(--border); display: block; }
.summary .info { flex: 1; min-width: 0; }
.summary .dims { font-weight: 600; font-size: 14px; }
.count-ok { color: var(--sift); font-weight: 550; }
.count-missing { color: var(--loftr); font-weight: 550; }
.count-edit { display: flex; align-items: center; gap: 8px; margin-top: 8px; flex-wrap: wrap; }

#results { display: none; margin-top: 16px; gap: 16px; }
.piece-col { flex: none; width: 116px; }
.piece-col .label, .cand-col .label {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--muted-foreground); margin-bottom: 6px; font-weight: 550;
}
#pieceThumb { width: 100%; border-radius: 8px; border: 1px solid var(--border); display: block; }
.seg-note { font-size: 11px; color: var(--muted-foreground); margin-top: 5px; }
.cand-col { flex: 1; min-width: 0; }

.cand {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; margin-bottom: 6px;
  background: var(--card);
  border: 1px solid var(--border); border-radius: 8px;
  cursor: pointer; transition: border-color 0.12s, background 0.12s;
}
.cand:hover { border-color: var(--ring); }
.cand.active { border-color: var(--foreground); }
.badge {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 11px; font-weight: 600; letter-spacing: 0.02em;
  padding: 2px 8px; border-radius: 999px; flex: none;
}
.badge.sift { color: var(--sift); background: var(--sift-bg); }
.badge.loftr { color: var(--loftr); background: var(--loftr-bg); }
.badge.template { color: var(--template); background: var(--template-bg); }
.cand .meta { font-size: 12px; color: var(--muted-foreground); flex: 1;
              white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.scorebar { width: 56px; height: 4px; border-radius: 2px; background: var(--secondary);
            overflow: hidden; flex: none; }
.scorebar i { display: block; height: 100%; border-radius: 2px; }
.cand .pct { font-size: 12.5px; font-weight: 600; width: 38px; text-align: right;
             font-variant-numeric: tabular-nums; flex: none; }

#canvasCard { display: none; padding: 12px; }
.canvas-bar { display: flex; align-items: center; justify-content: space-between;
              padding: 2px 6px 10px; }
.canvas-bar .title { font-size: 13px; font-weight: 600; }
.canvas-bar .hint { font-size: 12px; color: var(--muted-foreground); }
#canvasWrap { border-radius: calc(var(--radius) - 4px); overflow: hidden;
              border: 1px solid var(--border); }
canvas { width: 100%; display: block; }

.legend { display: flex; gap: 14px; margin-top: 10px; padding: 0 6px;
          font-size: 12px; color: var(--muted-foreground); flex-wrap: wrap; }
.legend .key { display: inline-block; width: 14px; height: 3px; border-radius: 2px;
               vertical-align: middle; margin-right: 6px; }

/* projects list */
.proj-head { display: flex; align-items: center; margin-bottom: 16px; }
.proj-head h1 { font-size: 21px; font-weight: 650; letter-spacing: -0.02em; margin: 0; flex: 1; }
.proj-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 14px; }
.proj-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-sm); overflow: hidden; cursor: pointer; position: relative;
  transition: border-color 0.15s, transform 0.15s; text-decoration: none; color: inherit;
  display: block;
}
.proj-card:hover { border-color: var(--ring); transform: translateY(-1px); }
.proj-card img { width: 100%; aspect-ratio: 4/3; object-fit: cover; display: block;
                 border-bottom: 1px solid var(--border); }
.proj-card .p-body { padding: 10px 12px; }
.proj-card .p-name { font-weight: 600; font-size: 13.5px; white-space: nowrap;
                     overflow: hidden; text-overflow: ellipsis; }
.proj-card .p-meta { font-size: 11.5px; color: var(--muted-foreground); margin-top: 2px; }
.proj-card .p-del {
  position: absolute; top: 8px; right: 8px; width: 26px; height: 26px;
  border-radius: 7px; border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card) 85%, transparent);
  color: var(--muted-foreground); cursor: pointer; display: grid; place-items: center;
  opacity: 0; transition: opacity 0.15s; font-size: 14px; line-height: 1;
}
.proj-card:hover .p-del { opacity: 1; }
.proj-card .p-del:hover { color: var(--destructive); border-color: var(--destructive); }
.empty-state { text-align: center; color: var(--muted-foreground); padding: 48px 0; }
.new-panel { display: none; margin-bottom: 16px; }
.new-panel.open { display: block; }

footer { margin-top: 40px; text-align: center;
         font-size: 12px; color: var(--muted-foreground); }
footer .mono { font-size: 11px; }

.lang-sel {
  font: inherit; font-size: 12.5px; color: var(--muted-foreground);
  background: var(--card); border: 1px solid var(--border);
  border-radius: 8px; padding: 6px 6px; height: 34px; cursor: pointer;
}
.lang-sel:hover { color: var(--foreground); }

/* photo preview / crop modal */
.pv-overlay {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(0, 0, 0, 0.62);
  display: flex; align-items: center; justify-content: center; padding: 16px;
}
.pv-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 14px; box-shadow: var(--shadow-md); padding: 14px;
  max-width: 700px; width: 100%;
}
.pv-canvas-wrap { display: flex; justify-content: center; }
#pvCanvas { max-width: 100%; border-radius: 8px; touch-action: none; cursor: crosshair; }
.pv-bar { display: flex; align-items: center; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
.pv-hint { font-size: 12px; color: var(--muted-foreground); }

.hidden { display: none !important; }
@media (max-width: 520px) {
  .page { padding: 20px 14px 60px; }
  #results { flex-direction: column; }
  .piece-col { width: 132px; }
}