:root {
  --bg: #0f1115;
  --card: #1a1d24;
  --card-border: #2a2e39;
  --text: #e8eaf0;
  --muted: #9aa0ae;
  --accent: #4f8cff;
  --accent-2: #7a5cff;
  --good: #34c759;
  --bad: #ff453a;
  --warn: #ff9f0a;
  --radius: 14px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

header {
  text-align: center;
  padding: 28px 16px 8px;
}
header h1 {
  margin: 0;
  font-size: 2rem;
  letter-spacing: 0.5px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.tagline { color: var(--muted); margin: 6px 0 0; font-size: 0.95rem; }

main {
  max-width: 780px;
  margin: 0 auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 18px;
}
.card h2 {
  margin: 0 0 12px;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 10px;
}
.stepnum {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px; height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.card.locked { opacity: 0.45; pointer-events: none; }

.btnrow, .formrow, .toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.btn {
  background: #262b36;
  color: var(--text);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform 0.06s ease, border-color 0.15s ease, background 0.15s;
}
.btn:hover { border-color: var(--accent); }
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border: none;
}
.btn-sm { padding: 6px 10px; font-size: 0.85rem; }
.btn-file { display: inline-block; }

.seg {
  display: inline-flex;
  border: 1px solid var(--card-border);
  border-radius: 10px;
  overflow: hidden;
}
.seg-btn {
  background: transparent;
  border: none;
  color: var(--muted);
  padding: 8px 14px;
  cursor: pointer;
  font-size: 0.9rem;
}
.seg-btn.active { background: var(--accent); color: #fff; }

input[type="text"], input[type="number"], select {
  background: #11141a;
  border: 1px solid var(--card-border);
  color: var(--text);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 0.95rem;
  min-width: 0;
}
input:focus, select:focus { outline: none; border-color: var(--accent); }

.formrow label { display: flex; flex-direction: column; gap: 4px; font-size: 0.8rem; color: var(--muted); }
.formrow label input, .formrow label select { width: 110px; }
#objName { flex: 1; min-width: 180px; }

.hint { color: var(--muted); font-size: 0.82rem; margin: 8px 0 0; }
.hint code { background: #11141a; padding: 1px 6px; border-radius: 6px; }

#cameraBox { margin-top: 14px; }
#camVideo {
  width: 100%;
  border-radius: 10px;
  background: #000;
  margin-bottom: 10px;
}

.canvas-wrap {
  margin-top: 12px;
  border-radius: 10px;
  overflow: hidden;
  background: #000;
  line-height: 0;
}
#canvas {
  width: 100%;
  height: auto;
  display: block;
  touch-action: none;
  cursor: crosshair;
}

.hidden { display: none !important; }

#result { font-size: 1rem; line-height: 1.5; }
.result-empty { color: var(--muted); }
.verdict {
  font-size: 1.3rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}
.verdict.good { color: var(--good); }
.verdict.bad { color: var(--bad); }
.verdict.warn { color: var(--warn); }
.result-details { margin-top: 10px; color: var(--muted); font-size: 0.9rem; }
.result-details b { color: var(--text); }

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  padding: 20px;
}