:root {
  --bg: #0f1216;
  --card: #181c23;
  --line: #2a313c;
  --text: #e7ecf3;
  --muted: #9aa6b6;
  --primary: #4f8cff;
  --primary-d: #3a72d8;
  --ok: #2fbf71;
  --err: #ff6b6b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", "Sarabun", system-ui, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #1b2330, var(--bg));
  color: var(--text);
  min-height: 100vh;
}

.app {
  max-width: 680px;
  margin: 0 auto;
  padding: 32px 20px 60px;
}

header h1 { margin: 0 0 6px; font-size: 26px; }
.sub { color: var(--muted); margin: 0 0 24px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 18px;
}

.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tab {
  flex: 1;
  padding: 10px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 14px;
}
.tab.active { color: var(--text); border-color: var(--primary); background: #1e2735; }

.pane.hidden, .hidden { display: none; }

.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 36px 16px;
  border: 2px dashed var(--line);
  border-radius: 14px;
  cursor: pointer;
  text-align: center;
  transition: border-color .15s;
}
.dropzone:hover { border-color: var(--primary); }
.dz-icon { font-size: 30px; }
.hint { color: var(--muted); font-size: 12px; }

.preview {
  width: 100%;
  max-height: 320px;
  background: #000;
  border-radius: 12px;
  margin-top: 6px;
}

.cam-controls { display: flex; align-items: center; gap: 10px; margin-top: 12px; }
.timer { font-variant-numeric: tabular-nums; color: var(--err); font-weight: 600; }

.meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--muted);
  font-size: 13px;
  margin: 8px 2px 0;
}

.btn {
  border: 1px solid var(--line);
  background: #222b38;
  color: var(--text);
  padding: 10px 16px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 14px;
}
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.primary { background: var(--primary); border-color: var(--primary); }
.btn.primary:hover:not(:disabled) { background: var(--primary-d); }
.btn.block { width: 100%; margin-top: 16px; padding: 13px; }
.link { background: none; border: none; color: var(--primary); cursor: pointer; }

.status { color: var(--muted); margin-bottom: 10px; font-size: 14px; }
.status.err { color: var(--err); }
.status.ok { color: var(--ok); }

.result {
  white-space: pre-wrap;
  word-break: break-word;
  font-family: inherit;
  line-height: 1.6;
  margin: 0;
}

.foot { color: var(--muted); font-size: 12px; text-align: center; margin-top: 8px; }

.spinner {
  display: inline-block;
  width: 14px; height: 14px;
  border: 2px solid var(--line);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  vertical-align: -2px;
  margin-right: 6px;
}
@keyframes spin { to { transform: rotate(360deg); } }