/* ==========================================================================
   cvk : carte "calculateur" (Converticious) : champs + tuiles de résultats
   Compagnon de cvp (sélecteur d'unités) : même charte, fichier indépendant.
   Aucun <select> : choix = chips (radios), nombres = champs + boutons − / +.
   ========================================================================== */

.cvk, .cvk-toast {
  --cvk-accent: #15803d;
  --cvk-accent-ink: #0f5f2c;
  --cvk-accent-soft: #e9f7ee;
  --cvk-accent-line: #bfe3cb;
  --cvk-ink: #1c1c21;
  --cvk-muted: #6a6a75;
  --cvk-line: #e3e3ea;
  --cvk-field: #f8f8fb;
  --cvk-radius: 16px;
}

.cvk { margin: 12px 0 22px; color: var(--cvk-ink); }
.cvk, .cvk *, .cvk *::before, .cvk *::after, .cvk-toast { box-sizing: border-box; }

/* ---------- Carte ---------- */
.cvk-card {
  display: grid;
  gap: 14px;
  padding: 12px;
  background: #fff;
  border: 1px solid var(--cvk-line);
  border-radius: var(--cvk-radius);
  box-shadow: 0 1px 2px rgba(20, 20, 40, .04), 0 8px 24px rgba(20, 20, 40, .06);
}

/* ---------- Champs ---------- */
.cvk-in { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.cvk-in--1, .cvk-in--stack { grid-template-columns: minmax(0, 1fr); }
.cvk-f { min-width: 0; }
.cvk-f--full { grid-column: 1 / -1; }

.cvk-lbl {
  display: block;
  margin: 0 0 6px 2px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--cvk-muted);
}

.cvk-box {
  display: flex;
  align-items: center;
  height: 52px;
  background: var(--cvk-field);
  border: 1.5px solid var(--cvk-line);
  border-radius: 12px;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
.cvk-box:focus-within {
  background: #fff;
  border-color: var(--cvk-accent);
  box-shadow: 0 0 0 4px var(--cvk-accent-soft);
}
.cvk .cvk-input {
  flex: 1;
  width: 100%;
  min-width: 0;
  height: 100%;
  margin: 0;
  padding: 0 12px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  box-shadow: none;
  outline: 0;
  font-family: inherit;
  font-size: 22px;              /* >= 16px : pas de zoom auto sur iOS */
  font-weight: 600;
  color: inherit;
  font-variant-numeric: tabular-nums;
  -moz-appearance: textfield;
  appearance: textfield;
}
.cvk-input::-webkit-outer-spin-button,
.cvk-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.cvk-suf { flex: none; padding-right: 14px; font-size: 14px; font-weight: 700; color: var(--cvk-muted); }

/* Boutons − / + et dénominateur (champ "fraction") */
.cvk-box--frac .cvk-input { text-align: center; padding: 0 4px; }
.cvk-btn {
  flex: none;
  width: 42px;
  height: 40px;
  margin: 0 5px;
  padding: 0;
  border: 0;
  border-radius: 9px;
  background: #ececf2;
  font-family: inherit;
  font-size: 20px;
  font-weight: 600;
  line-height: 1;
  color: var(--cvk-ink);
  cursor: pointer;
  transition: background .15s;
}
.cvk-btn:hover { background: #e0e0e9; }
.cvk-btn:active { background: #d6d6e2; }
.cvk-btn:focus-visible { outline: 2px solid var(--cvk-accent); outline-offset: 1px; }
.cvk-den { flex: none; padding-right: 14px; font-size: 16px; font-weight: 700; color: var(--cvk-muted); font-variant-numeric: tabular-nums; white-space: nowrap; }

/* ---------- Chips (radios) ---------- */
.cvk-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.cvk-chip { position: relative; display: inline-flex; margin: 0; cursor: pointer; }
.cvk .cvk-chip input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}
.cvk-chip span {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 14px;
  border: 1.5px solid var(--cvk-line);
  border-radius: 999px;
  background: #fff;
  font-size: 14px;
  font-weight: 600;
  color: var(--cvk-ink);
  transition: background .15s, border-color .15s, color .15s;
}
.cvk-chip:hover span { background: var(--cvk-field); border-color: #c9c9d3; }
.cvk .cvk-chip input:checked + span {
  background: var(--cvk-accent-soft);
  border-color: var(--cvk-accent);
  color: var(--cvk-accent-ink);
}
.cvk .cvk-chip input:focus-visible + span { outline: 2px solid var(--cvk-accent); outline-offset: 2px; }

/* ---------- Tuiles de résultats ---------- */
.cvk-out { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.cvk-res {
  position: relative;
  grid-column: span 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  min-width: 0;
  padding: 12px 14px;
  background: var(--cvk-field);
  border: 1.5px solid var(--cvk-line);
  border-radius: 14px;
}
.cvk-res--xl, .cvk-res--wide { grid-column: 1 / -1; }
.cvk-rl {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--cvk-muted);
}
.cvk-rv {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--cvk-ink);
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}
.cvk-res--xl .cvk-rv { font-size: 28px; }
.cvk-rs { font-size: 13px; color: var(--cvk-muted); }
.cvk-rs b { color: var(--cvk-ink); font-weight: 700; }
.cvk-res--accent { background: var(--cvk-accent-soft); border-color: var(--cvk-accent-line); }
.cvk-res--accent .cvk-rv { color: var(--cvk-accent-ink); }
.cvk-res .cvk-chips { margin-top: 2px; }
.cvk-res .cvk-chip span { min-height: 34px; padding: 0 12px; font-size: 13px; }

/* tuile cliquable = copie */
.cvk-res[data-copy] { cursor: copy; transition: border-color .15s, background .15s; }
.cvk-res[data-copy]:hover { border-color: var(--cvk-accent); }
.cvk-res[data-copy]:focus-visible { outline: 2px solid var(--cvk-accent); outline-offset: 2px; }
.cvk-res[data-copy]::after {
  content: "";
  position: absolute;
  top: 12px;
  right: 12px;
  width: 16px;
  height: 16px;
  opacity: .35;
  background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%231c1c21' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><rect x='9' y='9' width='13' height='13' rx='2'/><path d='M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1'/></svg>") no-repeat center / contain;
  transition: opacity .15s;
}
.cvk-res[data-copy]:hover::after { opacity: .75; }

/* ---------- Desktop / tablette ---------- */
@media (min-width: 640px) {
  .cvk-card { gap: 16px; padding: 18px 20px; }
  .cvk-in { grid-template-columns: repeat(2, minmax(0, 280px)); gap: 14px 24px; }
  .cvk-in--1 { grid-template-columns: minmax(0, 320px); }
  .cvk-in--stack { grid-template-columns: repeat(2, minmax(0, 280px)); }
  .cvk-chips { gap: 8px; }
  .cvk-chip span { min-height: 42px; padding: 0 16px; font-size: 15px; }
  .cvk-out { grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 12px; }
  .cvk-res { grid-column: span 2; padding: 14px 16px; }
  .cvk-res--xl, .cvk-res--half { grid-column: span 3; }
  .cvk-res--wide { grid-column: span 2; }
}

/* ---------- Toast "copié" ---------- */
.cvk-toast {
  position: fixed;
  left: 50%;
  bottom: max(24px, env(safe-area-inset-bottom));
  z-index: 70;
  max-width: calc(100% - 32px);
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--cvk-ink);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  opacity: 0;
  transform: translate(-50%, 12px);
  pointer-events: none;
  transition: opacity .2s, transform .2s;
}
.cvk-toast.is-on { opacity: 1; transform: translate(-50%, 0); }

@media (prefers-reduced-motion: reduce) { .cvk *, .cvk-toast { transition: none !important; } }
@media print { .cvk-toast { display: none !important; } }