/* phonetwin.co.uk/ai: the AI retainer page. Builds on oc.css (type, colours,
   sections); this file is the hero layout, the face window and the buttons. */

.ai-hero{min-height:100svh;display:flex;align-items:center;padding:110px 0 72px}
.ai-hero-in{display:grid;grid-template-columns:1fr;gap:clamp(36px,5vw,64px);align-items:center}
@media(min-width:960px){.ai-hero-in{grid-template-columns:1.05fr .95fr}}

.ai-talk{display:inline-flex;align-items:center;gap:10px;margin-top:clamp(28px,4vw,40px);padding:18px 28px;border:0;border-radius:999px;
  background:var(--red);color:#fff;font:700 clamp(19px,1.8vw,22px)/1 var(--disp);letter-spacing:-.01em;cursor:pointer;transition:background .15s,transform .15s}
.ai-talk:hover{background:#a30d26}
.ai-talk:active{transform:scale(.98)}
.ai-talk:focus-visible{outline:3px solid var(--ink);outline-offset:3px}
.ai-talk-quiet{background:var(--ink)}
.ai-talk-quiet:hover{background:#333}
.ai-talk-light{background:#fff;color:var(--ink)}
.ai-talk-light:hover{background:#e9e7e0}
.ai-under{font-size:17px;color:var(--ink-3);margin-top:16px;max-width:30em}
.ai-under .num{display:inline;white-space:nowrap;font-weight:600;color:var(--red);text-decoration:none}
.ai-under .num:hover{text-decoration:underline;text-underline-offset:3px}
.close .ai-under{color:rgba(255,255,255,.6)}
.close .ai-under .num{color:#ff5c6c}
.close .lead{color:rgba(255,255,255,.75)}

.ai-possible,.ai-price{padding:clamp(72px,10vw,150px) 0;background:#fff}
.ai-chat,.ai-proof,.ai-how{padding:clamp(72px,10vw,150px) 0}
.ai-possible .lead+.lead,.ai-price .lead+.lead{margin-top:18px}
.ai-cite{margin-top:28px;font-size:15px;color:var(--ink-3);max-width:40em}
.ai-proof .ai-talk{margin-top:36px}
.ai-how .step h3{font-size:clamp(24px,2.4vw,32px)}
.ai-how .step p{margin-top:8px;color:var(--ink-2);max-width:30em}
@media(min-width:900px){.ai-how .steps{grid-template-columns:repeat(3,1fr);gap:0 40px}}

/* ---------- the face window ---------- */
.face-card{background:#fff;border:1px solid var(--line);border-radius:24px;overflow:hidden;box-shadow:0 30px 80px -40px rgba(17,17,17,.35)}
.face-stage{position:relative;aspect-ratio:1/1;background:#15161a}
.face-stage video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
/* Before the call: the avatar's picture, breathing very slowly, the form over
   the bottom on a dark fade. During the call the live video covers it. */
.face-preview{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:50% 25%;display:block;transform-origin:50% 35%;animation:breathe 9s ease-in-out infinite alternate}
.face-preview[hidden]{display:none}
@keyframes breathe{from{transform:scale(1)}to{transform:scale(1.045)}}
@media(prefers-reduced-motion:reduce){.face-preview{animation:none}}
.face-stage.has-preview .face-veil{background:linear-gradient(180deg,rgba(21,22,26,0) 18%,rgba(21,22,26,.55) 42%,rgba(21,22,26,.94) 70%);justify-content:flex-end}
.face-stage.on-call .face-preview{display:none}
/* The twin's sums over the video: missed calls x days x value x conversion. */
.face-sum{position:absolute;left:14px;right:14px;bottom:14px;padding:14px 16px;border-radius:16px;background:rgba(17,17,17,.78);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);color:#fff;font-size:15px;line-height:1.5;opacity:0;transform:translateY(8px);transition:opacity .35s ease,transform .35s ease}
.face-sum.show{opacity:1;transform:none}
.face-sum[hidden]{display:none}
.face-sum .row{display:flex;justify-content:space-between;gap:12px;color:rgba(255,255,255,.8)}
.face-sum .row b{color:#fff;font-weight:600;font-variant-numeric:tabular-nums}
.face-sum .total{margin-top:8px;padding-top:8px;border-top:1px solid rgba(255,255,255,.2);font:700 clamp(20px,2.2vw,26px)/1.1 var(--disp);letter-spacing:-.01em}
.face-sum .note{margin-top:4px;font-size:13px;color:rgba(255,255,255,.6)}
@media(prefers-reduced-motion:reduce){.face-sum{transition:none}}
@media(max-width:1180px){.face-stage.has-preview{aspect-ratio:4/5}}
.face-veil{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:clamp(18px,4vw,36px);
  background:radial-gradient(120% 90% at 50% 30%,#2a2c33 0%,#15161a 70%);color:#fff;overflow-y:auto}
.face-veil[hidden]{display:none}
.face-form{width:100%;max-width:400px;display:flex;flex-direction:column;gap:10px}
.face-form[hidden]{display:none}
.face-veil-text{font:700 clamp(26px,2.8vw,34px)/1.05 var(--disp);letter-spacing:-.02em}
.face-veil-sub{font-size:16px;color:rgba(255,255,255,.65);margin-bottom:6px}
.face-field{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.face-input{width:100%;font:500 17px/1.2 var(--sans);padding:14px 16px;border-radius:12px;border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.08);color:#fff}
.face-input::placeholder{color:rgba(255,255,255,.5)}
.face-input:focus{outline:2px solid #ff5c6c;outline-offset:1px;border-color:transparent}
.face-check{display:flex;gap:10px;align-items:flex-start;font-size:14px;line-height:1.45;color:rgba(255,255,255,.78);cursor:pointer}
.face-check input{flex:none;width:20px;height:20px;margin:1px 0 0;accent-color:var(--red);cursor:pointer}
.face-terms-link{background:none;border:0;padding:0;font:inherit;color:#fff;text-decoration:underline;text-underline-offset:2px;cursor:pointer}
.face-terms-link:hover{color:#ff5c6c}
.face-err{font-size:15px;color:#ff8a96;min-height:1.2em}
.face-err:empty{min-height:0}
.face-go{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:15px 22px;border:0;border-radius:999px;background:var(--red);color:#fff;
  font:700 18px/1 var(--disp);letter-spacing:-.01em;cursor:pointer;transition:background .15s}
.face-go svg{width:20px;height:20px;fill:#fff}
.face-go:hover{background:#a30d26}
.face-go:disabled{opacity:.6;cursor:default}
.face-go:focus-visible{outline:3px solid #fff;outline-offset:3px}
.face-connecting{font:700 22px/1 var(--disp);color:rgba(255,255,255,.85)}
.face-connecting[hidden]{display:none}
@media(max-width:520px){.face-stage{aspect-ratio:4/5}}

/* ---------- the terms window ---------- */
.terms{border:0;border-radius:20px;padding:0;max-width:560px;width:calc(100% - 32px);color:var(--ink);background:#fff;box-shadow:0 30px 80px -20px rgba(0,0,0,.45)}
.terms::backdrop{background:rgba(17,17,17,.55)}
.terms-in{padding:clamp(22px,4vw,34px)}
.terms h2{font-size:clamp(26px,3vw,32px);margin-bottom:14px}
.terms p{font-size:16px;line-height:1.55;color:var(--ink-2);margin-top:12px}
.terms a{color:var(--red);font-weight:600}
.terms-small{font-size:14px!important;color:var(--ink-3)!important}
.terms-close{margin-top:22px;padding:12px 22px;border:0;border-radius:999px;background:var(--ink);color:#fff;font:700 16px/1 var(--disp);cursor:pointer}
.terms-close:hover{background:#333}
.face-bar{display:flex;align-items:center;gap:10px;padding:12px 14px}
.face-bar[hidden]{display:none}
.face-status{flex:1;display:flex;align-items:center;gap:8px;font-size:16px;color:var(--ink-3)}
.face-status i{width:9px;height:9px;border-radius:50%;background:var(--ghost)}
.face-status[data-s="Listening..."] i{background:#1f8f4e}
.face-status[data-s="Thinking..."] i{background:var(--amber)}
.face-status[data-s="Speaking..."] i{background:var(--blue)}
.face-btn{border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:12px;padding:10px 16px;font:600 16px/1 var(--sans);cursor:pointer}
.face-btn:hover{background:var(--paper-2)}
.face-end{background:var(--red);border-color:var(--red);color:#fff}
.face-end:hover{background:#a30d26}
.face-mic{position:relative;display:inline-flex;align-items:center;gap:1px;height:38px;padding:0 8px 0 10px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--ink-2);cursor:pointer}
.face-mic[hidden]{display:none}
.face-mic:hover{background:var(--paper-2)}
.face-mic svg{width:18px;height:18px;fill:currentColor}
.face-mic .face-mic-caret{width:14px;height:14px}
.face-mic select{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer;font-size:16px}
.face-mic:focus-within{outline:2px solid var(--red);outline-offset:2px}
.face-note{margin-top:14px;font-size:16px;color:var(--ink-2);min-height:1.5em;text-align:center}
.face-note a{color:var(--red);font-weight:600;text-decoration:none;white-space:nowrap}
@media(max-width:420px){.face-btn{padding:9px 12px}}
.hero-red{color:var(--red)}

/* What AI can really do: five groups of cards (2026-09-29). */
.ai-can{padding:clamp(72px,10vw,150px) 0}
.can-group{margin-top:clamp(56px,7vw,96px)}
.can-head{display:flex;gap:18px;align-items:flex-start}
.can-icon{flex:none;width:52px;height:52px;border-radius:14px;background:var(--red);display:grid;place-items:center;margin-top:4px}
.can-icon svg{width:26px;height:26px;fill:none;stroke:#fff;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.can-title{font-size:clamp(28px,3.4vw,44px);max-width:18em}
.can-intro{margin-top:12px;font-size:clamp(18px,1.9vw,22px);line-height:1.45;color:var(--ink-2);max-width:40em}
.can-cards{margin-top:28px;display:grid;grid-template-columns:1fr;gap:14px}
@media(min-width:640px){.can-cards{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.can-cards{grid-template-columns:repeat(3,1fr);gap:18px}}
.can-card{background:#fff;border:1px solid var(--line);border-top:3px solid var(--red);border-radius:16px;padding:22px 22px 24px}
.can-card h4{margin:0;font:700 clamp(19px,1.6vw,21px)/1.2 var(--disp);letter-spacing:-.015em}
.can-card p{margin:8px 0 0;font-size:16.5px;line-height:1.5;color:var(--ink-2)}
.can-charge{margin-top:clamp(56px,7vw,96px);padding:clamp(24px,3vw,36px);border-radius:20px;background:var(--ink);color:#fff;max-width:52em}
.can-charge p{margin:0;font-size:clamp(18px,1.9vw,22px);line-height:1.45;color:rgba(255,255,255,.8)}
.can-charge p+p{margin-top:14px}
.can-charge b{color:#fff}
.ai-can .ai-talk{margin-top:36px}

/* The pricing menu, the wary-of-AI note and About (2026-09-29). */
.price-free{margin-top:clamp(40px,5vw,64px);padding:clamp(22px,3vw,32px);border-radius:20px;background:var(--paper);border:2px dashed var(--red);max-width:52em}
.price-k{margin:0;font-size:15px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--red)}
.price-free h3{margin-top:6px;font-size:clamp(26px,3vw,36px)}
.price-free p:last-child{margin:10px 0 0;font-size:clamp(17px,1.8vw,20px);line-height:1.5;color:var(--ink-2)}
.price-tiers{margin-top:22px;display:grid;grid-template-columns:1fr;gap:16px}
@media(min-width:900px){.price-tiers{grid-template-columns:repeat(3,1fr);gap:20px}}
.tier{display:flex;flex-direction:column;padding:clamp(24px,2.6vw,32px);border-radius:20px;background:var(--paper);border:1px solid var(--line)}
.tier h3{font-size:clamp(24px,2.4vw,30px)}
.tier-price{margin:14px 0 0;font:800 clamp(38px,4vw,52px)/1 var(--disp);letter-spacing:-.04em;color:var(--red)}
.tier-price span{display:block;margin-bottom:4px;font:600 15px/1 var(--sans);letter-spacing:0;color:var(--ink-3)}
.tier-price small{margin-left:8px;font:500 16px/1 var(--sans);letter-spacing:0;color:var(--ink-3)}
.tier-what{margin:16px 0 0;font-size:17px;line-height:1.5;color:var(--ink-2)}
.tier ul{margin:18px 0 0;padding:16px 0 0;border-top:1px solid var(--line);list-style:none;display:grid;gap:9px}
.tier li{position:relative;padding-left:26px;font-size:16px;line-height:1.4}
.tier li::before{content:"";position:absolute;left:2px;top:4px;width:12px;height:7px;border-left:2.5px solid var(--red);border-bottom:2.5px solid var(--red);transform:rotate(-45deg)}
.tier-dark{background:var(--ink);color:#fff;border-color:var(--ink)}
.tier-dark .tier-what{color:rgba(255,255,255,.75)}
.tier-dark .tier-price{color:#ff5c6c}
.tier-dark .tier-price span,.tier-dark .tier-price small{color:rgba(255,255,255,.55)}
.tier-dark ul{border-top-color:rgba(255,255,255,.18)}
.tier-dark li::before{border-color:#ff5c6c}
.price-terms{margin:26px 0 0;padding:0;list-style:none;display:flex;flex-wrap:wrap;gap:10px 28px;font-size:16.5px;color:var(--ink-2)}
.price-terms b{color:var(--ink)}
.price-why{margin-top:clamp(36px,4vw,56px);max-width:44em}
.price-why h3{font-size:clamp(24px,2.6vw,32px)}
.price-why p{margin:12px 0 0;font-size:clamp(18px,1.9vw,21px);line-height:1.5;color:var(--ink-2)}
.ai-wary{padding:clamp(72px,10vw,150px) 0;background:#fff}
.ai-wary .lead+.lead{margin-top:18px}
/* Questions people ask (2026-09-30): an accordion, one open at a time is not enforced. */
.ai-faq{padding:clamp(72px,10vw,150px) 0}
.faq-list{margin-top:clamp(24px,3vw,40px);max-width:46em;border-top:1px solid var(--line,#e6e3dc)}
.faq-list details{border-bottom:1px solid var(--line,#e6e3dc)}
.faq-list summary{cursor:pointer;list-style:none;padding:18px 40px 18px 0;font-size:clamp(19px,2vw,23px);font-weight:600;line-height:1.3;position:relative}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"+";position:absolute;right:4px;top:50%;transform:translateY(-50%);font-size:28px;font-weight:400;color:var(--ink-2)}
.faq-list details[open] summary::after{content:"\2212"}
.faq-list details p{margin:0 0 20px;font-size:clamp(17px,1.7vw,20px);line-height:1.55;color:var(--ink-2);max-width:40em}
.ai-about{padding:clamp(72px,10vw,150px) 0}
.about-in{display:grid;grid-template-columns:1fr;gap:clamp(24px,4vw,64px)}
@media(min-width:960px){.about-in{grid-template-columns:.9fr 1.1fr;align-items:start}}
.about-copy p{margin:0 0 18px;font-size:clamp(19px,2vw,23px);line-height:1.5;color:var(--ink-2);max-width:32em}
.about-copy p:first-child{color:var(--ink);font-weight:600}
.about-copy .about-last{margin-top:26px;color:var(--ink);font:700 clamp(22px,2.4vw,28px)/1.25 var(--disp);letter-spacing:-.015em}

/* Top menu: Pricing and About one tap away (Rob, 2026-09-29). */
.top-right{display:flex;align-items:center;gap:clamp(14px,2.4vw,34px)}
.top-nav{display:flex;align-items:center;gap:clamp(14px,2vw,28px)}
.top-nav a{font-weight:600;font-size:17px;color:var(--ink);text-decoration:none;white-space:nowrap}
.top-nav a:hover{color:var(--red)}
.top-nav a:focus-visible{outline:2px solid var(--red);outline-offset:3px;border-radius:2px}
.top.dark .top-nav a{color:#fff}
/* Phones: the whole menu behind a hamburger (Rob, 2026-09-30: the links did not fit). */
.menu-toggle,.burger{display:none}
@media(max-width:760px){
  .burger{display:flex;flex-direction:column;justify-content:center;gap:5px;width:40px;height:40px;margin-right:-8px;cursor:pointer}
  .burger span{display:block;height:2px;width:22px;margin:0 auto;background:var(--ink);border-radius:2px;transition:transform .2s,opacity .2s}
  .top.dark .burger span{background:#fff}
  .top-nav{display:none;position:absolute;top:100%;left:0;right:0;z-index:40;flex-direction:column;align-items:stretch;gap:0;padding:6px var(--gutter) 10px;background:#f6f5f0;border-bottom:1px solid var(--line);box-shadow:0 12px 24px rgba(0,0,0,.08)}
  .top.dark .top-nav{background:#111}
  .top-nav a{padding:14px 0;border-top:1px solid var(--line);font-size:19px}
  .top-nav a:first-child{border-top:0}
  .menu-toggle:checked ~ .top-nav{display:flex}
  .menu-toggle:checked ~ .burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .menu-toggle:checked ~ .burger span:nth-child(2){opacity:0}
  .menu-toggle:checked ~ .burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
}
@media(max-width:480px){.top-right{gap:12px}.top-call{font-size:15px}}
main section[id]{scroll-margin-top:76px}

/* The caller's details on screen: left-aligned values, wraps long emails. */
.face-sum.details .row{justify-content:flex-start}
.face-sum.details .row span{flex:none;width:6.2em;color:rgba(255,255,255,.6)}
.face-sum.details .row b{font-weight:600;word-break:break-all}
.face-sum.details{font-size:17px}

/* The code step (2026-09-29). */
.face-step{display:flex;flex-direction:column;gap:10px}
.face-step[hidden]{display:none}
.face-sent{margin:0;font-size:15px;line-height:1.4;color:rgba(255,255,255,.85)}
.face-sent b{color:#fff}
.face-code{letter-spacing:.4em;font-size:22px;font-variant-numeric:tabular-nums}
.face-alt{margin:2px 0 0;text-align:center}
.face-link{background:none;border:0;padding:4px;color:rgba(255,255,255,.7);font:inherit;font-size:14px;text-decoration:underline;text-underline-offset:3px;cursor:pointer}
.face-link:hover{color:#fff}
.face-link[hidden]{display:none}
.face-check[hidden]{display:none}

/* The 404 page (2026-09-29). */
.nf{min-height:calc(100svh - 120px);display:flex;align-items:center;padding:120px 0 72px}
.nf-go{display:flex;flex-wrap:wrap;gap:12px;margin-top:clamp(28px,4vw,40px)}
.nf-go .ai-talk{text-decoration:none;margin-top:0}