/* ==========================================================
   Coppie Minime — identità visiva "quaderno di studio":
   carta calda, inchiostro blu-ardesia, evidenziazioni corallo.
   ========================================================== */

:root {
  --paper: #f7f3ec;
  --paper-deep: #efe8dc;
  --card: #fffdf9;
  --ink: #26333c;
  --ink-soft: #5d6b74;
  --line: #e2d9ca;
  --accent: #0e7c86;        /* verde-petrolio */
  --accent-deep: #0a5c64;
  --accent-soft: #e0f0f1;
  --coral: #d3593a;         /* evidenziazione del contrasto */
  --coral-soft: #fbe9e2;
  --ok: #2e7d4f;
  --err: #b0483a;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(38, 51, 60, .06), 0 6px 18px -8px rgba(38, 51, 60, .18);
  --font-ui: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-display: 'Fraunces', Georgia, serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-ui);
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 80% -10%, #ece2ff33, transparent 60%),
    radial-gradient(900px 420px at -10% 0%, #0e7c8614, transparent 55%),
    var(--paper);
  min-height: 100vh;
}

.hidden { display: none !important; }

/* ---------------- Topbar ---------------- */

.topbar {
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--card) 75%, transparent);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.topbar-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand { display: flex; align-items: center; gap: 14px; }

.brand-mark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: .02em;
  color: var(--accent-deep);
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  border-radius: 10px;
  padding: 8px 12px;
  white-space: nowrap;
}
.brand-mark b { color: var(--coral); font-weight: 700; }

.brand-text h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.15;
}
.brand-text p { margin: 2px 0 0; font-size: .8rem; color: var(--ink-soft); }

/* ---------------- Layout ---------------- */

.layout {
  max-width: 1240px;
  margin: 26px auto 60px;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 22px;
  align-items: start;
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ---------------- Controlli ---------------- */

.controls {
  padding: 20px 20px 0;
  position: sticky;
  top: 84px;
  max-height: calc(100vh - 104px);
  overflow-y: auto;
}

.control-block + .control-block { margin-top: 22px; }

.control-title {
  margin: 0 0 10px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.group-tabs { display: flex; flex-wrap: wrap; gap: 6px; }

.group-tab {
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink-soft);
  font: inherit;
  font-size: .8rem;
  font-weight: 600;
  padding: 6px 11px;
  border-radius: 999px;
  cursor: pointer;
  transition: all .15s ease;
}
.group-tab:hover { border-color: var(--accent); color: var(--accent-deep); }
.group-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.group-desc { margin: 10px 2px 8px; font-size: .8rem; color: var(--ink-soft); }

.contrast-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 260px;
  overflow-y: auto;
  padding-right: 4px;
}

.contrast-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 10px;
  padding: 9px 12px;
  font: inherit;
  cursor: pointer;
  text-align: left;
  transition: all .13s ease;
}
.contrast-item:hover { border-color: var(--accent); }
.contrast-item.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: inset 3px 0 0 var(--accent);
}

.contrast-name { font-weight: 700; font-size: .92rem; }
.contrast-example { font-size: .75rem; color: var(--ink-soft); font-style: italic; }
.contrast-n {
  font-size: .72rem;
  font-weight: 600;
  color: var(--accent-deep);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 2px 8px;
  flex-shrink: 0;
}
.contrast-item.active .contrast-n { background: #fff; }

.pill-row { display: flex; gap: 6px; }

.pill {
  flex: 1;
  border: 1px solid var(--line);
  background: var(--paper);
  font: inherit;
  font-size: .82rem;
  font-weight: 600;
  color: var(--ink-soft);
  padding: 8px 4px;
  border-radius: 9px;
  cursor: pointer;
  transition: all .13s ease;
}
.pill:hover:not(:disabled) { border-color: var(--accent); color: var(--accent-deep); }
.pill.active { background: var(--ink); border-color: var(--ink); color: #fff; }
.pill:disabled { opacity: .4; cursor: not-allowed; }

.hint { margin: 8px 2px 0; font-size: .75rem; color: var(--ink-soft); min-height: 1em; }

.count-row { display: flex; align-items: center; gap: 14px; }

input[type='range'] {
  flex: 1;
  accent-color: var(--accent);
  height: 26px;
}
.count-row output {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  min-width: 2ch;
  text-align: center;
  color: var(--accent-deep);
}

.check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  font-size: .84rem;
  color: var(--ink-soft);
  cursor: pointer;
  user-select: none;
}
.check-row input { accent-color: var(--accent); width: 16px; height: 16px; }

/* ---------------- Bottoni ---------------- */

.btn {
  font: inherit;
  font-weight: 600;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  border-radius: 10px;
  padding: 9px 16px;
  cursor: pointer;
  transition: all .14s ease;
}
.btn:hover { border-color: var(--accent); color: var(--accent-deep); }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-deep); border-color: var(--accent-deep); color: #fff; }

.btn-ghost { background: transparent; }

.btn-small { font-size: .8rem; padding: 6px 12px; border-radius: 8px; }

/* Il dock resta sempre visibile in fondo al pannello, anche quando
   i controlli scorrono: rigenerazione rapida dopo ogni modifica. */
.generate-dock {
  position: sticky;
  bottom: 0;
  z-index: 5;
  margin: 14px -20px 0;
  padding: 12px 20px 18px;
  background: linear-gradient(to top, var(--card) 78%, transparent);
  border-radius: 0 0 var(--radius) var(--radius);
}

.btn-generate {
  width: 100%;
  font-size: 1rem;
  padding: 13px;
  border-radius: 12px;
  box-shadow: 0 6px 16px -6px color-mix(in srgb, var(--accent) 55%, transparent);
}

/* ---------------- Risultati ---------------- */

.results { min-height: 480px; padding: 24px; }

.results-empty {
  height: 100%;
  min-height: 430px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--ink-soft);
  gap: 18px;
  padding: 20px;
}

.empty-pair {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  gap: 18px;
  align-items: center;
  opacity: .25;
}
.empty-sep { color: var(--coral); }

.results-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

.results-title { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.results-title h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 700;
}
.results-count { font-size: .82rem; color: var(--ink-soft); }

.results-actions { display: flex; gap: 8px; }

.pairs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}

.pair-card {
  position: relative;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 12px;
  padding: 16px 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: box-shadow .15s ease, transform .15s ease;
}
.pair-card:hover { box-shadow: var(--shadow); transform: translateY(-1px); }

.pair-words {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.pair-word {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 500;
  letter-spacing: .015em;
}
.pair-word .hit {
  color: var(--coral);
  font-weight: 700;
  background: var(--coral-soft);
  border-radius: 4px;
  padding: 0 2px;
  box-shadow: inset 0 -2px 0 var(--coral);
}
.pair-dash { color: var(--ink-soft); }

.pair-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.pair-pos {
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.pair-tools { display: flex; gap: 4px; }

.icon-btn {
  border: none;
  background: transparent;
  font-size: .95rem;
  cursor: pointer;
  border-radius: 7px;
  padding: 4px 7px;
  line-height: 1;
  transition: background .12s ease;
}
.icon-btn:hover { background: var(--paper-deep); }
.icon-btn.speaking { background: var(--accent-soft); }

.pair-remove {
  position: absolute;
  top: 6px;
  right: 6px;
  border: none;
  background: transparent;
  color: var(--ink-soft);
  font-size: .8rem;
  cursor: pointer;
  border-radius: 6px;
  padding: 3px 6px;
  opacity: 0;
  transition: opacity .12s ease, background .12s ease;
}
.pair-card:hover .pair-remove { opacity: 1; }
.pair-remove:hover { background: var(--coral-soft); color: var(--err); }

/* ---------------- Barra esportazione ---------------- */

.export-bar {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.export-label { font-size: .78rem; font-weight: 600; color: var(--ink-soft); }
.export-sep { flex-basis: 100%; height: 0; }

/* ---------------- Overlay / esercizio ---------------- */

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(38, 51, 60, .45);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  padding: 20px;
}

.exercise-box, .info-box {
  position: relative;
  background: var(--card);
  border-radius: 18px;
  box-shadow: 0 24px 60px -20px rgba(0, 0, 0, .4);
  padding: 34px 38px;
  max-width: 560px;
  width: 100%;
  text-align: center;
}

.info-box { text-align: left; max-height: 85vh; overflow-y: auto; }
.info-box h2 { font-family: var(--font-display); margin-top: 0; }
.info-box p, .info-box li { font-size: .92rem; line-height: 1.55; color: var(--ink); }
.info-box ul { padding-left: 20px; }
.info-footnote { font-size: .8rem !important; color: var(--ink-soft) !important; }

.overlay-close {
  position: absolute;
  top: 12px;
  right: 12px;
  border: none;
  background: var(--paper);
  border-radius: 8px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  font-size: .9rem;
  color: var(--ink-soft);
}
.overlay-close:hover { background: var(--paper-deep); color: var(--ink); }

.ex-progress { margin: 0 0 4px; font-size: .78rem; color: var(--ink-soft); }
.ex-instruction { margin: 0 0 18px; font-weight: 600; }

.ex-play { font-size: 1rem; padding: 12px 26px; border-radius: 12px; }

.ex-choices {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 24px 0 6px;
}

.ex-word {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  border: 2px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  border-radius: 14px;
  padding: 22px 10px;
  cursor: pointer;
  transition: all .13s ease;
}
.ex-word:hover:not(:disabled) { border-color: var(--accent); background: var(--accent-soft); }
.ex-word:disabled { cursor: default; }
.ex-word.correct { border-color: var(--ok); background: #e7f3ec; color: var(--ok); }
.ex-word.wrong { border-color: var(--err); background: var(--coral-soft); color: var(--err); }

.ex-feedback { min-height: 1.4em; font-weight: 600; margin: 10px 0 2px; }
.ex-feedback.good { color: var(--ok); }
.ex-feedback.bad { color: var(--err); }

.ex-score { font-size: .85rem; color: var(--ink-soft); }

/* ---------------- Toast ---------------- */

.toast {
  position: fixed;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: #fff;
  font-size: .85rem;
  font-weight: 500;
  padding: 10px 18px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  z-index: 60;
  animation: toast-in .2s ease;
}
@keyframes toast-in {
  from { opacity: 0; transform: translate(-50%, 8px); }
  to   { opacity: 1; transform: translate(-50%, 0); }
}

/* ---------------- Modalità embed (dentro iframe) ---------------- */

/* L'iframe ospite si ridimensiona sul contenuto: non c'è scroll interno,
   quindi niente elementi sticky. */
/* min-height:100vh creerebbe un ciclo: iframe più alto → 100vh più alto → contenuto più alto */
html.embedded body { min-height: 0; }
html.embedded .layout { margin-bottom: 24px; }
html.embedded .topbar { position: static; }
html.embedded .controls { position: static; max-height: none; overflow: visible; }
html.embedded .generate-dock { position: static; margin: 14px 0 20px; padding: 0; background: none; }

/* ---------------- Responsive ---------------- */

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .controls { position: static; max-height: none; overflow: visible; }
  .contrast-list { max-height: 230px; }
  .results { min-height: 0; }
  .exercise-box, .info-box { padding: 26px 20px; }
  .ex-word { font-size: 1.35rem; padding: 18px 8px; }
}