/* ==========================================================
   ASSISTENTE IA (js/assistant.js · testi in content.js → assistant)
   Pulsante «Domande» con un punto che respira 4·4·6 come «Respira con me»;
   il pannello è una scheda scura, angoli retti, filo rosso a sinistra.
   Misure e tempi: tokens.css (--assist-*, --breath-cycle).
   ========================================================== */
/* il WhatsApp sale di un posto: in basso resta sempre «Domande» */
.has-assist .waFab { bottom: calc(var(--gutter) + var(--fab-size) + .75rem); }

.assistFab {
  position: fixed; z-index: var(--z-fab); right: var(--gutter); bottom: var(--gutter);
  display: inline-flex; align-items: center; gap: .7rem; height: var(--fab-size); padding: 0 1.25rem 0 1.05rem; cursor: pointer;
  background: var(--stone); color: var(--ink); border: 0; box-shadow: 0 18px 40px -18px rgb(0 0 0 / .9);
  font: 600 .8rem/1 var(--font-body); letter-spacing: .08em; text-transform: uppercase;
  transition: transform var(--dur-fast) var(--ease-out), background-color var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out), opacity var(--dur-base) var(--ease-out);
}
.assistFab:active { transform: scale(.96); }
/* durante l'intro di respirazione resta fuori: entra quando l'intro sparisce */
body:has(#intro) .assistFab { opacity: 0; visibility: hidden; transform: translateY(calc(100% + var(--gutter))); }
.assistFab { transition-property: transform, background-color, color, opacity, visibility; }
.assistFab[aria-expanded="true"] { background: var(--red); color: var(--on-red); }
.assistFab__breath { position: relative; width: .7rem; height: .7rem; flex: none; }
.assistFab__breath::before, .assistFab__breath::after { content: ""; position: absolute; inset: 0; border-radius: 50%; background: var(--red); }
.assistFab__breath::after { background: transparent; border: 1.5px solid var(--red); animation: assistBreath var(--breath-cycle) var(--ease-in-out) infinite; }
.assistFab[aria-expanded="true"] .assistFab__breath::before { background: var(--on-red); }
.assistFab[aria-expanded="true"] .assistFab__breath::after { border-color: var(--on-red); }
/* 4 s inspira (cresce) · 4 s trattieni · 6 s espira (si ritira) */
@keyframes assistBreath {
  0%           { transform: scale(1);   opacity: .2; }
  28.6%, 57.1% { transform: scale(2.6); opacity: .9; }
  100%         { transform: scale(1);   opacity: .2; }
}
@media (hover: hover) and (pointer: fine) {
  .assistFab:hover { background: var(--red); color: var(--on-red); }
  .assistFab:hover .assistFab__breath::before { background: var(--on-red); }
  .assistFab:hover .assistFab__breath::after { border-color: var(--on-red); }
}

.assist {
  position: fixed; z-index: var(--z-assist); right: var(--gutter); bottom: calc(var(--gutter) + var(--fab-size) + .75rem);
  width: min(var(--assist-w), calc(100vw - 2 * var(--gutter))); height: var(--assist-h);
  display: grid; grid-template-rows: auto minmax(0, 1fr) auto auto;
  background: rgb(22 19 20 / .97); color: var(--stone); border: var(--stroke) solid var(--line); border-left: 3px solid var(--red);
  -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px);
  box-shadow: 0 40px 90px -30px rgb(0 0 0 / .95);
  transform-origin: 100% 100%;
  opacity: 0; transform: translateY(14px) scale(.97);
  transition: opacity calc(var(--dur-assist) * .66) var(--ease-out), transform calc(var(--dur-assist) * .66) var(--ease-out);
}
.assist[data-state="open"] { opacity: 1; transform: none; transition-duration: var(--dur-assist); }
.assist[hidden] { display: none; }

.assist__head { position: relative; padding: 1.2rem 3.6rem 1rem 1.3rem; border-bottom: var(--stroke) solid var(--line); }
.assist__kicker { font: 400 var(--fs-small)/1.3 var(--font-mono); letter-spacing: var(--track-mono); text-transform: uppercase; color: var(--red-ink); }
.assist__title { margin-top: .35rem; font: 800 2.1rem/.9 var(--font-display); text-transform: uppercase; letter-spacing: var(--track-display); }
.assist__close { position: absolute; top: .7rem; right: .7rem; width: 44px; height: 44px; display: grid; place-items: center; cursor: pointer; background: none; border: 0; color: var(--stone-dim); transition: color var(--dur-fast); }
.assist__close span, .assist__close span::after { display: block; width: 1.1rem; height: 2px; background: currentColor; }
.assist__close span { transform: rotate(45deg); }
.assist__close span::after { content: ""; transform: rotate(90deg); }
@media (hover: hover) and (pointer: fine) { .assist__close:hover { color: var(--stone); } }

.assist__log { overflow-y: auto; overscroll-behavior: contain; padding: 1.1rem 1.3rem; display: flex; flex-direction: column; gap: .85rem; scrollbar-width: thin; scrollbar-color: var(--ink-3) transparent; }
.assist__msg { max-width: 92%; font-size: .95rem; line-height: 1.55; animation: assistIn 260ms var(--ease-out) both; }
.assist__msg p + p, .assist__msg p + ul, .assist__msg ul + p { margin-top: .55rem; }
.assist__msg ul { display: grid; gap: .3rem; padding-left: 0; list-style: none; }
.assist__msg li { position: relative; padding-left: 1rem; }
.assist__msg li::before { content: ""; position: absolute; left: 0; top: .72em; width: .45rem; height: 2px; background: var(--red); }
.assist__msg--bot { align-self: flex-start; }
.assist__msg--user { align-self: flex-end; padding: .65rem .9rem; background: var(--ink-3); border-right: 2px solid var(--red); }
@keyframes assistIn { from { opacity: 0; transform: translateY(8px); } }

/* attesa: una barra che respira (inspira · trattieni · espira, accelerato) */
.assist__breathing { display: block; width: 4.5rem; height: 2px; background: var(--line); overflow: hidden; margin-block: .6rem; }
.assist__breathing i { display: block; height: 100%; background: var(--red); transform-origin: 0 50%; animation: assistWait 2.1s var(--ease-in-out) infinite; }
@keyframes assistWait { 0% { transform: scaleX(.08); } 28.6%, 57.1% { transform: scaleX(1); } 100% { transform: scaleX(.08); } }

.assist__sugg { display: grid; gap: .45rem; margin-top: .2rem; list-style: none; padding: 0; }
.assist__sugg button {
  width: 100%; text-align: left; cursor: pointer; padding: .7rem .85rem; min-height: 44px;
  background: transparent; color: var(--stone); border: var(--stroke) solid var(--line);
  font: 500 .9rem/1.35 var(--font-body);
  transition: border-color var(--dur-fast), background-color var(--dur-fast), transform var(--dur-fast) var(--ease-out);
}
.assist__sugg button:active { transform: scale(.98); }
@media (hover: hover) and (pointer: fine) { .assist__sugg button:hover { border-color: var(--red); background: rgb(212 21 28 / .08); } }

.assist__ask { margin-top: .75rem; padding-top: .75rem; border-top: var(--stroke) solid var(--line); }
.assist__ask p { font: 400 var(--fs-small)/1.3 var(--font-mono); letter-spacing: var(--track-mono); text-transform: uppercase; color: var(--stone-dim); }
.assist__askRow { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .55rem; }
.assist__askBtn { display: inline-flex; align-items: center; min-height: 44px; padding: 0 1rem; color: var(--stone); border: var(--stroke) solid var(--line); font: 600 .78rem/1 var(--font-body); letter-spacing: .08em; text-transform: uppercase; transition: border-color var(--dur-fast), background-color var(--dur-fast); }
.assist__askBtn--wa { background: var(--red); border-color: var(--red); color: var(--on-red); }
@media (hover: hover) and (pointer: fine) { .assist__askBtn:hover { border-color: var(--red); } .assist__askBtn--wa:hover { background: var(--red-deep); } }

.assist__form { display: grid; grid-template-columns: 1fr auto; align-items: end; border-top: var(--stroke) solid var(--line); transition: box-shadow var(--dur-fast); }
.assist__form textarea {
  resize: none; min-height: 3.4rem; max-height: 8rem; padding: 1.05rem 1.3rem; border: 0; outline: 0;
  background: transparent; color: var(--stone); font: 400 1rem/1.4 var(--font-body);   /* 16px: niente zoom su iOS */
}
.assist__form textarea::placeholder { color: var(--stone-dim); }
.assist__form:focus-within { box-shadow: inset 0 2px 0 var(--red); }
.assist__send { width: 3.4rem; height: 3.4rem; display: grid; place-items: center; cursor: pointer; background: var(--red); color: var(--on-red); border: 0; transition: background-color var(--dur-fast), transform var(--dur-fast) var(--ease-out); }
.assist__send svg { width: 1.3rem; height: 1.3rem; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: square; }
.assist__send:active { transform: scale(.94); }
.assist__send:disabled { background: var(--ink-3); color: var(--stone-dim); cursor: progress; }
@media (hover: hover) and (pointer: fine) { .assist__send:not(:disabled):hover { background: var(--red-deep); } }
.assist__privacy { padding: .6rem 1.3rem .8rem; font-size: .72rem; line-height: 1.45; color: var(--stone-dim); }
.assist__privacy a { text-decoration: underline; text-decoration-color: var(--red); text-underline-offset: .2em; }

/* celular: scheda dal basso a tutta larghezza */
@media (max-width: 860px) {
  .assistFab { padding: 0 1.05rem; }
  .assist {
    left: 0; right: 0; bottom: 0; width: 100%; height: var(--assist-h-m); max-height: 100dvh;
    border-left: 0; border-right: 0; border-bottom: 0; border-top: 3px solid var(--red);
    transform-origin: 50% 100%; transform: translateY(100%);
    padding-bottom: env(safe-area-inset-bottom);
  }
  /* velo sulla pagina dietro la scheda (un tocco lì la chiude) */
  .assist[data-state="open"] { box-shadow: 0 0 0 100vmax rgb(13 12 12 / .6); }
  .assist[data-state="open"] { transform: none; }
  .assist__head { padding-left: var(--gutter); }
  .assist__log, .assist__form textarea, .assist__privacy { padding-inline: var(--gutter); }
  .assist-open .assistFab, .assist-open .waFab { opacity: 0; pointer-events: none; }
  body:has(.notice:not([data-state="hidden"])) .assistFab { bottom: calc(var(--gutter) + 9rem); }
  .has-assist body:has(.notice:not([data-state="hidden"])) .waFab { bottom: calc(var(--gutter) + 9rem + var(--fab-size) + .75rem); }
}

@media (prefers-reduced-motion: reduce) {
  .assistFab__breath::after { animation: none; transform: scale(1.8); opacity: .5; }
  .assist, .assist[data-state="open"] { transform: none; transition: opacity 150ms linear; }
  .assist__msg { animation: none; }
  .assist__breathing i { animation: none; transform: scaleX(.5); }
}