:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #1c2333;
  --muted: #6b7280;
  --border: #dfe3ec;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --pos: #16a34a;
  --neg: #dc2626;
  --track: #e5e7eb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1420;
    --card: #181f30;
    --text: #e8ecf5;
    --muted: #9aa4b8;
    --border: #2a3350;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --track: #2a3350;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 40px 16px;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.card {
  width: 100%;
  max-width: 640px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

h1 { margin: 0 0 6px; font-size: 1.6rem; }
.subtitle { margin: 0 0 20px; color: var(--muted); font-size: 0.95rem; }

.label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--muted); margin-bottom: 6px; }

textarea {
  width: 100%;
  padding: 12px 14px;
  font: inherit;
  font-size: 1rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  resize: vertical;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2); }

.meta { display: flex; justify-content: space-between; font-size: 0.78rem; color: var(--muted); margin: 6px 2px 16px; }

.examples { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 20px; }
.examples .label { margin: 0 4px 0 0; }

.chip {
  font: inherit;
  font-size: 0.85rem;
  padding: 6px 12px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.1s;
}
.chip:hover { border-color: var(--accent); }
.chip:active { transform: scale(0.97); }

.primary {
  width: 100%;
  padding: 12px;
  font: inherit;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
}
.primary:hover:not(:disabled) { background: var(--accent-hover); }
.primary:disabled { opacity: 0.5; cursor: not-allowed; }

.loader { margin-bottom: 20px; }
.loader.done { display: none; }
.loader-text { font-size: 0.85rem; color: var(--muted); margin-bottom: 6px; }
.loader-track, .track { height: 8px; background: var(--track); border-radius: 999px; overflow: hidden; }
.loader-fill { height: 100%; width: 0%; background: var(--accent); border-radius: 999px; transition: width 0.2s; }

.loader-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.loader-head .loader-text { margin-bottom: 0; }

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--track);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loader-hint {
  margin: 10px 0 0;
  padding: 10px 12px;
  font-size: 0.85rem;
  line-height: 1.4;
  color: var(--text);
  background: var(--bg);
  border: 1px dashed var(--border);
  border-radius: 8px;
}

.result { margin-top: 22px; padding: 18px; border: 1px solid var(--border); border-radius: 12px; background: var(--bg); }
.hidden { display: none; }

.verdict { font-size: 1.4rem; font-weight: 700; margin-bottom: 14px; }
.verdict.pos { color: var(--pos); }
.verdict.neg { color: var(--neg); }

.bar-row { display: grid; grid-template-columns: 70px 1fr 52px; align-items: center; gap: 10px; font-size: 0.9rem; margin-bottom: 8px; }
.bar-row span:last-child { text-align: right; font-variant-numeric: tabular-nums; }
.fill { height: 100%; width: 0%; border-radius: 999px; transition: width 0.5s ease; }
.fill.pos { background: var(--pos); }
.fill.neg { background: var(--neg); }

footer { margin-top: 24px; text-align: center; font-size: 0.78rem; color: var(--muted); }

@media (max-width: 480px) {
  .card { padding: 20px; }
  h1 { font-size: 1.35rem; }
}