:root {
  --bg: #0b1220;
  --card: #131c2e;
  --card2: #1a2540;
  --text: #eaf0fb;
  --muted: #8ea0c0;
  --accent: #3b82f6;
  --accent2: #2563eb;
  --green: #22c55e;
  --red: #ef4444;
  --amber: #f59e0b;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 18px;
  line-height: 1.45;
}

header {
  padding: 22px 18px 8px;
  text-align: center;
}
header h1 { margin: 0; font-size: 24px; letter-spacing: .3px; }
header .sub { margin: 6px 0 0; color: var(--muted); font-size: 14px; }
.pdf-link { display: inline-block; margin: 12px auto 0; padding: 10px 16px; background: #243352; color: #fff; text-decoration: none; border-radius: 10px; font-size: 14px; font-weight: 600; }
.pdf-link:active { background: #2c3e63; }

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 14px 14px 160px;
}

.section-label {
  color: var(--muted);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 22px 6px 8px;
}

.card {
  background: var(--card);
  border: 1px solid #20305299;
  border-radius: 16px;
  padding: 16px;
  margin: 12px 0;
}
.card.whole { background: linear-gradient(160deg, #1a2540, #131c2e); }

.card-top { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.card h2 { margin: 0; font-size: 18px; }
.card .num { color: var(--accent); font-weight: 700; margin-right: 6px; }
.hint { color: var(--muted); font-size: 12px; text-align: right; }

.en {
  margin: 10px 0 4px;
  font-size: 18px;
}
.pron {
  margin: 0 0 12px;
  color: var(--amber);
  font-style: italic;
  font-size: 14px;
}

.btns { display: flex; gap: 10px; }

.btn {
  flex: 1;
  border: none;
  border-radius: 12px;
  padding: 14px 12px;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  min-height: 52px;
}
.btn.listen { background: #243352; }
.btn.listen:active { background: #2c3e63; }
.btn.practice { background: var(--accent); }
.btn.practice:active { background: var(--accent2); }
.btn.recording { background: var(--red); animation: pulse 1.1s infinite; }
.btn:disabled { opacity: .45; }

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 #ef444466; }
  50% { box-shadow: 0 0 0 8px #ef444400; }
}

/* Pannello risultato, fisso in basso */
.result {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  max-width: 640px;
  margin: 0 auto;
  background: var(--card2);
  border-top: 1px solid #2c3e63;
  border-radius: 18px 18px 0 0;
  padding: 16px 16px 22px;
  box-shadow: 0 -10px 30px #0008;
  max-height: 70vh;
  overflow-y: auto;
}
.result.hidden { display: none; }

.result .r-top { display: flex; align-items: center; justify-content: space-between; }
.result .r-title { font-size: 14px; color: var(--muted); }
.result .close { background: none; border: none; color: var(--muted); font-size: 24px; cursor: pointer; }

.score { font-size: 40px; font-weight: 800; margin: 4px 0; }
.verdict { font-size: 15px; margin: 0 0 12px; }

.diff { font-size: 19px; line-height: 1.7; margin: 10px 0; }
.diff .ok { color: var(--green); }
.diff .miss { color: var(--red); text-decoration: underline; text-underline-offset: 3px; }

.fix { font-size: 14px; color: var(--text); margin: 10px 0 4px; }
.fix b { color: var(--red); }
.fix-title { color: var(--muted); font-size: 13px; margin-bottom: 6px; }
.pron-row { font-size: 17px; margin: 5px 0; }
.pron-row b { color: var(--red); }
.pron-row i { color: var(--amber); font-style: normal; font-weight: 700; }
.th-tip { font-size: 12px; color: var(--muted); margin-top: 8px; line-height: 1.5; }
.said { font-size: 14px; color: var(--muted); margin: 10px 0 14px; }
.said i { color: var(--text); font-style: normal; }

.retry { width: 100%; background: var(--accent); border: none; color: #fff; font-weight: 700; padding: 14px; border-radius: 12px; font-size: 16px; min-height: 52px; }

.loading { text-align: center; color: var(--muted); padding: 18px; }
.err { color: var(--red); }