/* ===== Impara l'Inglese — stile in stile Busuu ===== */
:root {
  --bg: #f4f5fb;
  --bg-soft: #eceeffc7;
  --card: #ffffff;
  --ink: #1f2140;
  --ink-soft: #5b5d7a;
  --muted: #8a8ca6;
  --line: #e7e8f2;
  --primary: #6c5ce7;
  --primary-ink: #4b3fc4;
  --primary-soft: #efeafe;
  --accent: #00b894;
  --accent-soft: #d6f7ee;
  --danger: #e5484d;
  --danger-soft: #fde8e8;
  --warn: #ff9f43;
  --gold: #ffb703;
  --shadow: 0 10px 30px rgba(38, 40, 82, 0.08);
  --shadow-sm: 0 4px 14px rgba(38, 40, 82, 0.07);
  --radius: 20px;

  --lvl-A1: #21bf73;
  --lvl-A2: #12b3c9;
  --lvl-B1: #4b7bec;
  --lvl-B2: #8e5cf7;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12132a;
    --bg-soft: #1a1c39;
    --card: #1c1e3d;
    --ink: #f0f1ff;
    --ink-soft: #b9bce0;
    --muted: #8285b0;
    --line: #2c2f57;
    --primary: #8b7bff;
    --primary-ink: #b3a8ff;
    --primary-soft: #262a55;
    --accent: #1fd7a8;
    --accent-soft: #12362f;
    --danger: #ff6b6f;
    --danger-soft: #3a1f26;
    --primary-soft: #24264c;
    --shadow: 0 12px 34px rgba(0, 0, 0, 0.4);
    --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: radial-gradient(1200px 600px at 80% -10%, var(--bg-soft), transparent), var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
img { max-width: 100%; }

/* ===== Layout ===== */
.wrap { max-width: 880px; margin: 0 auto; padding: 0 18px 90px; }

/* ===== Top bar ===== */
.topbar {
  position: sticky; top: 0; z-index: 30;
  backdrop-filter: saturate(160%) blur(12px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: 880px; margin: 0 auto; padding: 12px 18px;
  display: flex; align-items: center; gap: 14px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: -.3px; }
.brand .logo { width: 34px; height: 34px; border-radius: 10px; box-shadow: var(--shadow-sm); overflow: hidden; display: block; flex: none; }
.brand .logo svg { width: 34px; height: 34px; display: block; }
.brand b { font-size: 1.05rem; }
.brand small { display: block; color: var(--muted); font-weight: 600; font-size: .68rem; margin-top: -2px; letter-spacing: .2px; }
.spacer { flex: 1; }
.stat-pill {
  display: inline-flex; align-items: center; gap: 6px; font-weight: 700; font-size: .9rem;
  background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 7px 12px;
  box-shadow: var(--shadow-sm);
}
.stat-pill .ico { font-size: 1rem; }
.stat-pill.streak { color: var(--warn); }
.stat-pill.xp { color: var(--primary); }
.icon-btn { width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center;
  background: var(--card); border: 1px solid var(--line); box-shadow: var(--shadow-sm); font-size: 1.1rem; }
.icon-btn:hover { border-color: var(--primary); }

/* ===== Hero ===== */
.hero {
  margin: 22px 0 10px; padding: 26px; border-radius: var(--radius);
  background: linear-gradient(135deg, var(--primary), #9b6bff 90%);
  color: #fff; box-shadow: var(--shadow); position: relative; overflow: hidden;
}
.hero:after { content: ""; position: absolute; right: -40px; top: -40px; width: 220px; height: 220px;
  background: radial-gradient(circle, rgba(255,255,255,.25), transparent 70%); }
.hero h1 { font-size: 1.7rem; letter-spacing: -.5px; margin-bottom: 6px; }
.hero p { opacity: .92; max-width: 46ch; }
.hero-stats { display: flex; gap: 22px; margin-top: 18px; flex-wrap: wrap; }
.hero-stats .n { font-size: 1.4rem; font-weight: 800; }
.hero-stats .l { font-size: .75rem; opacity: .85; text-transform: uppercase; letter-spacing: .6px; }

/* ===== Level section ===== */
.level { margin-top: 30px; }
.level-head { display: flex; align-items: center; gap: 14px; margin-bottom: 6px; }
.level-badge {
  width: 52px; height: 52px; border-radius: 16px; display: grid; place-items: center; flex: none;
  color: #fff; font-weight: 800; font-size: 1.05rem; box-shadow: var(--shadow-sm);
}
.level-head h2 { font-size: 1.2rem; letter-spacing: -.3px; }
.level-head .sub { color: var(--muted); font-size: .85rem; font-weight: 600; }
.level-head .prog { margin-left: auto; text-align: right; }
.level-head .prog .bar { width: 120px; height: 8px; border-radius: 99px; background: var(--line); overflow: hidden; }
.level-head .prog .bar > i { display: block; height: 100%; border-radius: 99px; }
.level-head .prog small { color: var(--muted); font-weight: 700; font-size: .72rem; }

/* ===== Path ===== */
.path { position: relative; padding: 14px 0 4px; margin-left: 24px; }
.path:before { content: ""; position: absolute; left: 3px; top: 0; bottom: 24px; width: 4px; border-radius: 4px;
  background: repeating-linear-gradient(var(--line), var(--line) 8px, transparent 8px, transparent 14px); }
.node { position: relative; display: flex; align-items: center; gap: 16px; padding: 9px 0; }
.node .dot {
  position: relative; z-index: 2; width: 22px; height: 22px; border-radius: 50%; flex: none; margin-left: -6px;
  background: var(--card); border: 4px solid var(--line);
}
.node.done .dot { background: var(--accent); border-color: var(--accent); }
.node.current .dot { border-color: var(--primary); box-shadow: 0 0 0 5px var(--primary-soft); }
.lesson-card {
  flex: 1; display: flex; align-items: center; gap: 14px; text-align: left; width: 100%;
  background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 14px 16px;
  box-shadow: var(--shadow-sm); transition: transform .12s ease, box-shadow .12s ease, border-color .12s;
}
.lesson-card:not(.locked):hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--primary); }
.lesson-card.locked { opacity: .62; cursor: not-allowed; }
.lesson-card .lc-ico { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; font-size: 1.3rem; flex: none; }
.lesson-card .lc-main { flex: 1; min-width: 0; }
.lesson-card .lc-main .t { font-weight: 700; letter-spacing: -.2px; }
.lesson-card .lc-main .s { color: var(--muted); font-size: .82rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lesson-card .lc-right { flex: none; color: var(--muted); font-weight: 800; font-size: .78rem; display: flex; align-items: center; gap: 8px; }
.chip-score { background: var(--accent-soft); color: var(--accent); padding: 3px 9px; border-radius: 99px; font-size: .72rem; }
.chip-video { background: var(--primary-soft); color: var(--primary-ink); padding: 3px 9px; border-radius: 99px; font-size: .7rem; font-weight: 800; }

/* ===== Lesson player ===== */
.player { min-height: 100vh; display: flex; flex-direction: column; }
.player-top {
  position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px); border-bottom: 1px solid var(--line);
}
.player-top-inner { max-width: 720px; margin: 0 auto; padding: 12px 18px; display: flex; align-items: center; gap: 14px; }
.pbar { flex: 1; height: 12px; border-radius: 99px; background: var(--line); overflow: hidden; }
.pbar > i { display: block; height: 100%; background: linear-gradient(90deg, var(--primary), #9b6bff); border-radius: 99px; transition: width .35s ease; }
.player-body { flex: 1; max-width: 720px; margin: 0 auto; width: 100%; padding: 24px 18px 40px; }
.step-kicker { color: var(--primary); font-weight: 800; font-size: .78rem; text-transform: uppercase; letter-spacing: 1px; }
.step-title { font-size: 1.5rem; letter-spacing: -.4px; margin: 4px 0 18px; }

/* intro / tip */
.objective { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow-sm); }
.objective .goal { display: flex; gap: 12px; align-items: flex-start; }
.objective .goal .e { font-size: 1.6rem; }
.tip { margin-top: 16px; background: var(--primary-soft); border-radius: 16px; padding: 16px 18px; }
.tip b { color: var(--primary-ink); }

/* vocab */
.vocab-list { display: grid; gap: 12px; }
.vocab {
  background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 16px 18px; box-shadow: var(--shadow-sm);
}
.vocab .row1 { display: flex; align-items: center; gap: 10px; }
.vocab .en { font-size: 1.15rem; font-weight: 800; letter-spacing: -.2px; }
.vocab .it { color: var(--primary); font-weight: 700; margin-left: auto; }
.vocab .ex { margin-top: 8px; color: var(--ink-soft); font-size: .92rem; }
.vocab .ex .ex-it { color: var(--muted); font-style: italic; }
.say { width: 34px; height: 34px; border-radius: 10px; background: var(--primary-soft); color: var(--primary-ink);
  display: grid; place-items: center; font-size: 1rem; flex: none; }
.say:hover { background: var(--primary); color: #fff; }
.say:active { transform: scale(.92); }

/* video */
.video-wrap { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); background: #000; aspect-ratio: 16/9; }
.video-wrap iframe { width: 100%; height: 100%; border: 0; display: block; }
.video-missing { aspect-ratio: 16/9; border-radius: var(--radius); display: grid; place-items: center; text-align: center;
  background: var(--card); border: 1px dashed var(--line); color: var(--muted); padding: 20px; }
.video-hint { display: flex; align-items: center; gap: 8px; margin-top: 10px; color: var(--muted); font-size: .82rem; }
.video-hint a { color: var(--primary); font-weight: 700; }

/* questions */
.q-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow-sm); }
.q-index { color: var(--muted); font-weight: 800; font-size: .78rem; letter-spacing: .5px; }
.q-text { font-size: 1.2rem; font-weight: 700; margin: 6px 0 16px; letter-spacing: -.2px; }
.q-instr { color: var(--muted); font-size: .9rem; margin-bottom: 10px; }
.opts { display: grid; gap: 10px; }
.opt {
  display: flex; align-items: center; gap: 12px; text-align: left; width: 100%;
  background: var(--card); border: 2px solid var(--line); border-radius: 14px; padding: 14px 16px; font-size: 1rem; font-weight: 600;
  transition: border-color .12s, background .12s, transform .08s;
}
.opt .key { width: 26px; height: 26px; border-radius: 8px; background: var(--bg-soft); display: grid; place-items: center; font-size: .8rem; font-weight: 800; color: var(--muted); flex: none; }
.opt:not(:disabled):hover { border-color: var(--primary); transform: translateY(-1px); }
.opt.correct { border-color: var(--accent); background: var(--accent-soft); }
.opt.correct .key { background: var(--accent); color: #fff; }
.opt.wrong { border-color: var(--danger); background: var(--danger-soft); }
.opt.wrong .key { background: var(--danger); color: #fff; }
.opt.dim { opacity: .55; }

.fill-input {
  width: 100%; font-size: 1.1rem; font-weight: 700; padding: 14px 16px; border-radius: 14px;
  border: 2px solid var(--line); background: var(--card); color: var(--ink); outline: none;
}
.fill-input:focus { border-color: var(--primary); }
.fill-input.correct { border-color: var(--accent); background: var(--accent-soft); }
.fill-input.wrong { border-color: var(--danger); background: var(--danger-soft); }

.feedback { margin-top: 16px; border-radius: 14px; padding: 14px 16px; font-weight: 600; display: none; }
.feedback.show { display: block; animation: pop .2s ease; }
.feedback.ok { background: var(--accent-soft); color: var(--accent); }
.feedback.no { background: var(--danger-soft); color: var(--danger); }
.feedback .sol { color: var(--ink-soft); font-weight: 600; display: block; margin-top: 4px; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--primary); color: #fff; font-weight: 800; font-size: 1rem;
  padding: 14px 22px; border-radius: 14px; box-shadow: var(--shadow-sm); transition: transform .1s, filter .1s;
}
.btn:hover { filter: brightness(1.05); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .45; cursor: default; }
.btn.ghost { background: var(--card); color: var(--ink); border: 1px solid var(--line); box-shadow: none; }
.btn.block { width: 100%; }
.btn.accent { background: var(--accent); }
.footer-cta { position: sticky; bottom: 0; padding: 16px 0 6px; margin-top: 24px;
  background: linear-gradient(transparent, var(--bg) 40%); }

/* summary */
.summary { text-align: center; padding: 20px 0; }
.summary .medal { font-size: 4rem; }
.summary h2 { font-size: 1.8rem; margin: 6px 0; letter-spacing: -.4px; }
.summary .score-ring { margin: 18px auto; }
.summary .rewards { display: flex; justify-content: center; gap: 14px; margin: 18px 0; flex-wrap: wrap; }
.reward { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 14px 20px; box-shadow: var(--shadow-sm); }
.reward .n { font-size: 1.5rem; font-weight: 800; }
.reward.xp .n { color: var(--primary); }
.reward .l { color: var(--muted); font-size: .74rem; text-transform: uppercase; letter-spacing: .6px; font-weight: 700; }

.back-btn { display: inline-flex; align-items: center; gap: 6px; color: var(--ink-soft); font-weight: 700; font-size: .9rem; }
.back-btn:hover { color: var(--primary); }

/* dots stepper */
.dots { display: flex; gap: 6px; }
.dots i { width: 8px; height: 8px; border-radius: 50%; background: var(--line); }
.dots i.on { background: var(--primary); }
.dots i.ok { background: var(--accent); }

/* empty / loading */
.center-note { text-align: center; padding: 60px 20px; color: var(--muted); }
.spinner { width: 40px; height: 40px; border-radius: 50%; border: 4px solid var(--line); border-top-color: var(--primary); margin: 0 auto 16px; animation: spin 1s linear infinite; }

/* sheet (settings) */
.sheet-bg { position: fixed; inset: 0; background: rgba(20,20,45,.5); z-index: 50; display: grid; place-items: end center; }
.sheet { background: var(--card); width: 100%; max-width: 520px; border-radius: 22px 22px 0 0; padding: 24px 22px 30px; box-shadow: var(--shadow); animation: up .25s ease; }
.sheet h3 { margin-bottom: 4px; }
.sheet .opt-row { display: flex; align-items: center; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.sheet .opt-row:last-child { border: 0; }
.toggle { margin-left: auto; width: 48px; height: 28px; border-radius: 99px; background: var(--line); position: relative; transition: background .15s; }
.toggle.on { background: var(--accent); }
.toggle i { position: absolute; top: 3px; left: 3px; width: 22px; height: 22px; border-radius: 50%; background: #fff; transition: left .15s; box-shadow: 0 1px 4px rgba(0,0,0,.25); }
.toggle.on i { left: 23px; }

@keyframes pop { from { transform: scale(.96); opacity: .4; } to { transform: scale(1); opacity: 1; } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes up { from { transform: translateY(30px); opacity: .6; } to { transform: translateY(0); opacity: 1; } }

/* confetti */
#confetti-layer { position: fixed; inset: 0; pointer-events: none; z-index: 60; overflow: hidden; }
.confetti { position: absolute; width: 10px; height: 14px; will-change: transform; }

/* ===== Pronuncia (microfono) ===== */
.mic { width: 34px; height: 34px; border-radius: 10px; background: var(--accent-soft); color: var(--accent);
  display: grid; place-items: center; font-size: 1rem; flex: none; }
.mic:hover { background: var(--accent); color: #fff; }
.mic:active { transform: scale(.92); }
.mic.listening { background: var(--accent); color: #fff; animation: micpulse 1s infinite; }
@keyframes micpulse { 0%,100% { box-shadow: 0 0 0 0 rgba(0,184,148,.5); } 50% { box-shadow: 0 0 0 9px rgba(0,184,148,0); } }
.pron-result { margin-top: 10px; font-weight: 700; font-size: .9rem; border-radius: 12px; padding: 10px 12px; }
.pron-result.ok { background: var(--accent-soft); color: var(--accent); }
.pron-result.mid { background: #fff2df; color: #b8730a; }
.pron-result.no { background: var(--danger-soft); color: var(--danger); }
.pron-result.listening { background: var(--primary-soft); color: var(--primary-ink); }
.pron-result .heard { display: block; font-weight: 600; opacity: .8; margin-top: 3px; font-size: .82rem; }
@media (prefers-color-scheme: dark) { .pron-result.mid { background: #3a2c14; color: #ffb454; } }

/* ===== Ripasso ===== */
.ripasso-card { width: 100%; display: flex; align-items: center; gap: 14px; text-align: left; margin-top: 16px;
  background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 16px 18px; box-shadow: var(--shadow-sm);
  transition: transform .12s, box-shadow .12s, border-color .12s; }
.ripasso-card:not(.locked):hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: var(--accent); }
.ripasso-card.locked { opacity: .68; cursor: default; }
.ripasso-card .rc-ico { width: 46px; height: 46px; border-radius: 13px; background: var(--accent-soft); display: grid; place-items: center; font-size: 1.5rem; flex: none; }
.ripasso-card .rc-main { flex: 1; min-width: 0; }
.ripasso-card .rc-main .t { font-weight: 800; letter-spacing: -.2px; }
.ripasso-card .rc-main .s { color: var(--muted); font-size: .85rem; }
.ripasso-card .rc-right { flex: none; color: var(--muted); font-weight: 800; }
.ripasso-card .rc-badge { background: var(--accent); color: #fff; border-radius: 99px; padding: 4px 11px; font-size: .85rem; }
.review-word { display: flex; align-items: center; gap: 12px; margin-bottom: 4px; }
.review-word .rw-en { font-size: 1.7rem; font-weight: 800; letter-spacing: -.4px; }
.say.big, .mic.big { width: 42px; height: 42px; font-size: 1.2rem; border-radius: 12px; }

/* ===== Test di livello & Esami ===== */
.placement-card { width: 100%; display: flex; align-items: center; gap: 14px; text-align: left; margin-top: 16px;
  border: none; border-radius: 18px; padding: 16px 18px; color: #fff; cursor: pointer;
  background: linear-gradient(135deg, var(--primary), #a06bff); box-shadow: var(--shadow); transition: transform .12s, box-shadow .12s; }
.placement-card:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(108,92,231,.4); }
.placement-card .pc-ico { width: 46px; height: 46px; border-radius: 13px; background: rgba(255,255,255,.22); display: grid; place-items: center; font-size: 1.5rem; flex: none; }
.placement-card .pc-main { flex: 1; min-width: 0; }
.placement-card .pc-main .t { font-weight: 800; letter-spacing: -.2px; }
.placement-card .pc-main .s { font-size: .85rem; opacity: .92; }
.placement-card .pc-right { flex: none; font-weight: 800; opacity: .95; white-space: nowrap; }
.chip-exam { background: var(--accent-soft); color: var(--accent); font-weight: 800; font-size: .72rem; padding: 4px 10px; border-radius: 99px; letter-spacing: .3px; }
.chip-score.skip { background: var(--line); color: var(--muted); }
.lvl-trophy { font-size: .95rem; }
.node.exam-node .dot { background: var(--accent); }
.node.exam-node.current .dot, .node.exam-node.done .dot { box-shadow: 0 0 0 4px var(--accent-soft); }
.exam-card { border: 1.5px dashed var(--line) !important; }
.exam-card:not(.locked) { border-color: var(--accent) !important; }

@media (max-width: 560px) {
  .hero h1 { font-size: 1.4rem; }
  .level-head .prog .bar { width: 84px; }
  .brand small { display: none; }
  .step-title { font-size: 1.3rem; }
}