/* Best AI Chats — single stylesheet, mobile-first */
:root{
  --bg:#0D0E14; --card:#161822; --card2:#1C1F2E; --line:#262A3B;
  --text:#F2F3F7; --muted:#9CA0B0;
  --violet:#7C3AED; --pink:#EC4899; --cta:#FF4D6D; --cta-hi:#FF6B85;
  --good:#34D399; --bad:#F87171;
  --grad:linear-gradient(120deg,#7C3AED,#EC4899);
  --r:16px; --maxw:1080px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--text);font:16px/1.65 system-ui,-apple-system,'Segoe UI',Roboto,Helvetica,Arial,sans-serif}
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;background:
 radial-gradient(1100px 560px at 88% -140px,rgba(124,58,237,.13),transparent 62%),
 radial-gradient(900px 480px at -8% 34%,rgba(236,72,153,.07),transparent 60%),
 radial-gradient(800px 420px at 60% 110%,rgba(59,40,120,.12),transparent 60%)}
img,svg{max-width:100%;height:auto;display:block}
a{color:#C4B5FD;text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 18px}
h1{font-size:clamp(1.7rem,5.5vw,2.7rem);line-height:1.18;letter-spacing:-.02em}
h2{font-size:clamp(1.35rem,4vw,1.9rem);line-height:1.25;margin:0 0 .6em}
h3{font-size:1.15rem}
p{margin:0 0 1em}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- header ---------- */
.site-head{position:sticky;top:0;z-index:50;background:rgba(13,14,20,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.site-head .wrap{display:flex;align-items:center;gap:14px;height:60px}
.logo{display:flex;align-items:center;flex:0 0 auto}
.nav-toggle{margin-left:auto;background:none;border:1px solid var(--line);border-radius:10px;width:42px;height:38px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform .25s,opacity .25s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav{position:fixed;inset:60px 0 auto 0;background:var(--bg);border-bottom:1px solid var(--line);padding:10px 18px 18px;display:none;z-index:49}
.nav.open{display:block}
.nav a{display:block;padding:12px 6px;color:var(--text);font-weight:600;border-bottom:1px solid var(--line)}
.nav a:last-child{border-bottom:0}
.nav a:hover{color:#fff;text-decoration:none}
@media(min-width:880px){
  .nav-toggle{display:none}
  .nav{position:static;display:flex;gap:4px;background:none;border:0;padding:0;margin-left:8px}
  .nav a{border:0;padding:8px 12px;font-size:.95rem;color:var(--muted);border-radius:10px}
  .nav a:hover{color:var(--text);background:var(--card)}
  
}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:56px 0 40px;text-align:left}
.hero .wrap{position:relative;z-index:2}
.aurora{position:absolute;inset:0;z-index:0;overflow:hidden;pointer-events:none}
.aurora i{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5;will-change:transform}
.aurora i:nth-child(1){width:520px;height:520px;left:-160px;top:-220px;background:#4C1D95;animation:drift1 26s ease-in-out infinite alternate}
.aurora i:nth-child(2){width:460px;height:460px;right:-140px;top:40px;background:#831843;animation:drift2 32s ease-in-out infinite alternate}
.aurora i:nth-child(3){width:380px;height:380px;left:35%;top:-160px;background:#1E3A8A;opacity:.35;animation:drift1 40s ease-in-out infinite alternate-reverse}
@keyframes drift1{to{transform:translate(70px,40px) scale(1.08)}}
@keyframes drift2{to{transform:translate(-60px,30px) scale(1.12)}}
.bubbles{position:absolute;inset:0;z-index:1;pointer-events:none}
.bubbles i{position:absolute;bottom:-60px;width:44px;height:34px;border-radius:12px;background:linear-gradient(120deg,rgba(124,58,237,.25),rgba(236,72,153,.25));animation:rise 16s linear infinite;opacity:0}
.bubbles i:nth-child(2){left:20%;animation-delay:4s;width:30px;height:24px}
.bubbles i:nth-child(3){left:70%;animation-delay:8s}
.bubbles i:nth-child(4){left:88%;animation-delay:12s;width:26px;height:20px}
.bubbles i:nth-child(1){left:8%}
@keyframes rise{0%{transform:translateY(0);opacity:0}12%{opacity:.7}80%{opacity:.25}100%{transform:translateY(-84vh);opacity:0}}
@media(prefers-reduced-motion:reduce){.aurora i,.bubbles i,.pulse,.chatdemo .msg,.dots i{animation:none!important;opacity:1!important;transform:none!important}}
/* hero layout with chat demo */
.hero-grid{display:grid;gap:34px;align-items:center}
@media(min-width:880px){.hero-grid{grid-template-columns:1.25fr 1fr}}
.hero-cta{margin-top:22px;display:flex;align-items:center;flex-wrap:wrap;gap:6px}
.chatdemo{background:rgba(22,24,34,.82);border:1px solid var(--line);border-radius:20px;padding:18px;backdrop-filter:blur(6px);box-shadow:0 18px 50px rgba(0,0,0,.4);max-width:420px}
.chatdemo .ch-head{display:flex;align-items:center;gap:10px;padding-bottom:12px;border-bottom:1px solid var(--line);margin-bottom:14px}
.chatdemo .ava{width:34px;height:34px;border-radius:50%;background:var(--grad);display:grid;place-items:center;font-weight:800;color:#fff;font-size:.9rem}
.chatdemo .ch-head b{font-size:.95rem}
.chatdemo .ch-head span{display:block;font-size:.72rem;color:var(--good)}
.chatdemo .msg{max-width:85%;padding:10px 14px;border-radius:16px;font-size:.9rem;margin-bottom:10px;opacity:0;transform:translateY(8px);animation:msgin .5s ease forwards}
.chatdemo .m1{background:var(--card2);border-bottom-left-radius:4px;animation-delay:.4s}
.chatdemo .m2{background:linear-gradient(120deg,rgba(124,58,237,.5),rgba(236,72,153,.5));margin-left:auto;border-bottom-right-radius:4px;animation-delay:1.4s}
.chatdemo .m3{background:var(--card2);border-bottom-left-radius:4px;animation-delay:2.6s}
@keyframes msgin{to{opacity:1;transform:none}}
.dots{display:inline-flex;gap:4px;padding:6px 2px 0}
.dots i{width:6px;height:6px;border-radius:50%;background:var(--muted);animation:blink 1.2s infinite}
.dots i:nth-child(2){animation-delay:.2s}.dots i:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,80%,100%{opacity:.25}40%{opacity:1}}
.chatdemo .tag{font-size:.68rem;color:var(--muted);text-align:center;margin-top:8px}
@media(max-width:879px){.chatdemo{margin:6px auto 0}}
/* step cards for guide page */
.steps{counter-reset:step;display:grid;gap:16px;margin:20px 0}
.step{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 18px 18px 64px;position:relative}
.step::before{counter-increment:step;content:counter(step);position:absolute;left:18px;top:18px;width:32px;height:32px;border-radius:10px;background:var(--grad);color:#fff;font-weight:800;display:grid;place-items:center}
.step h3{margin-bottom:6px}
.kicker{color:var(--pink);font-weight:700;text-transform:uppercase;letter-spacing:.08em;font-size:.8rem;margin-bottom:10px}
.hero p.lead{color:var(--muted);font-size:1.06rem;max-width:640px;margin:14px 0 20px}
.updated{display:inline-flex;align-items:center;gap:8px;color:var(--muted);font-size:.85rem;background:var(--card);border:1px solid var(--line);padding:5px 12px;border-radius:999px}
.updated b{color:var(--good);font-weight:600}

/* ---------- disclosure ---------- */
.disclosure{font-size:.8rem;color:var(--muted);border-left:3px solid var(--line);padding:6px 12px;margin:18px 0}

/* ---------- ranked cards ---------- */
.cards{display:grid;gap:22px;margin:26px 0 10px}
.card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;transition:transform .22s,border-color .22s,box-shadow .22s}
.card:hover{transform:translateY(-3px);border-color:#3B3F55;box-shadow:0 12px 34px rgba(0,0,0,.35)}
.card.top{border:2px solid transparent;background:linear-gradient(var(--card),var(--card)) padding-box,var(--grad) border-box;box-shadow:0 10px 40px rgba(236,72,153,.13)}
.ribbon{position:absolute;top:-13px;left:20px;background:var(--grad);color:#fff;font-size:.74rem;font-weight:800;letter-spacing:.05em;text-transform:uppercase;padding:4px 12px;border-radius:999px}
.card-head{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:8px}
.rank{flex:0 0 auto;width:40px;height:40px;border-radius:12px;background:var(--card2);border:1px solid var(--line);display:grid;place-items:center;font-weight:800;font-size:1.1rem}
.card.top .rank{background:var(--grad);border:0;color:#fff}
.card-head h3,.card-head h2{font-size:1.3rem;margin:0}
.bestfor{font-size:.78rem;font-weight:700;color:#C4B5FD;background:rgba(124,58,237,.14);border:1px solid rgba(124,58,237,.35);padding:3px 10px;border-radius:999px}
.score{display:flex;align-items:center;gap:10px;margin:10px 0 4px}
.score b{font-size:1.05rem}
.bar{flex:1;max-width:220px;height:8px;background:var(--card2);border-radius:99px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--grad);border-radius:99px;width:0;transition:width 1s cubic-bezier(.2,.7,.3,1)}
.feat{display:grid;gap:6px;margin:12px 0;padding:0;list-style:none}
.feat li{padding-left:26px;position:relative;color:#D6D9E4;font-size:.96rem}
.feat li::before{content:"✓";position:absolute;left:2px;color:var(--good);font-weight:700}
.pc{display:grid;gap:14px;margin:14px 0}
@media(min-width:680px){.pc{grid-template-columns:1fr 1fr}}
.pc ul{list-style:none;padding:14px 16px;border-radius:12px;background:var(--card2);display:grid;gap:6px;font-size:.92rem}
.pc .pros li::before{content:"+ ";color:var(--good);font-weight:800}
.pc .cons li::before{content:"– ";color:var(--bad);font-weight:800}
.pc b{font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.price-line{color:var(--muted);font-size:.92rem;margin:8px 0}
.price-line b{color:var(--text)}

/* ---------- CTA ---------- */
.cta-zone{margin-top:14px}
.trust{font-size:.8rem;color:var(--muted);margin-bottom:8px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--cta);color:#fff!important;font-weight:800;font-size:1.05rem;padding:15px 30px;border-radius:999px;box-shadow:0 6px 24px rgba(255,77,109,.35);transition:transform .18s,background .18s,box-shadow .18s;text-decoration:none!important;min-height:52px}
.btn:hover{background:var(--cta-hi);transform:translateY(-2px);box-shadow:0 10px 30px rgba(255,77,109,.45)}
.btn:active{transform:translateY(0)}
.btn .arr{transition:transform .18s}
.btn:hover .arr{transform:translateX(4px)}
.btn-quiet{display:inline-block;margin-left:16px;color:var(--muted);font-size:.92rem}
.pulse{animation:pulse 3s ease-in-out infinite}
@keyframes pulse{0%,100%{box-shadow:0 6px 24px rgba(255,77,109,.35)}50%{box-shadow:0 6px 38px rgba(255,77,109,.65)}}
@media(max-width:679px){.btn{width:100%}.btn-quiet{display:block;margin:10px 0 0;text-align:center}}

/* sticky mobile CTA */
.sticky-cta{position:fixed;left:0;right:0;bottom:0;z-index:60;background:rgba(18,20,30,.96);backdrop-filter:blur(8px);border-top:1px solid var(--line);padding:10px 14px calc(10px + env(safe-area-inset-bottom));display:none;align-items:center;gap:10px;transform:translateY(110%);transition:transform .3s}
.sticky-cta.show{transform:none}
.sticky-cta .btn{flex:1;padding:12px 16px;font-size:.98rem;box-shadow:none}
.sticky-cta .close{background:none;border:0;color:var(--muted);font-size:1.3rem;padding:4px 8px;cursor:pointer}
@media(max-width:879px){.sticky-cta{display:flex}}

/* ---------- table ---------- */
.tblwrap{overflow-x:auto;margin:18px 0;border:1px solid var(--line);border-radius:12px}
table{border-collapse:collapse;width:100%;min-width:640px;font-size:.92rem}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line)}
th{background:var(--card2);font-size:.78rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
tr:last-child td{border-bottom:0}
td b{color:var(--text)}

/* ---------- content sections ---------- */
.section{padding:34px 0}
.section.alt{background:var(--card);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.prose{max-width:760px}
.prose h2{margin-top:1.4em}
.prose ul{margin:0 0 1em 1.2em}
.prose li{margin-bottom:.4em}
details{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:0;margin-bottom:10px}
summary{cursor:pointer;font-weight:700;padding:15px 18px;list-style:none;position:relative}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:18px;color:var(--pink);font-size:1.2rem;transition:transform .2s}
details[open] summary::after{transform:rotate(45deg)}
details .a{padding:0 18px 15px;color:var(--muted)}
.note{background:rgba(124,58,237,.08);border:1px solid rgba(124,58,237,.3);border-radius:12px;padding:14px 18px;font-size:.92rem;color:#D6D9E4;margin:18px 0}

/* ---------- footer ---------- */
.site-foot{border-top:1px solid var(--line);padding:34px 0 90px;margin-top:40px;color:var(--muted);font-size:.88rem}
.site-foot .cols{display:grid;gap:24px;margin-bottom:22px}
@media(min-width:680px){.site-foot .cols{grid-template-columns:2fr 1fr 1fr}}
.site-foot h4{color:var(--text);font-size:.82rem;text-transform:uppercase;letter-spacing:.06em;margin-bottom:10px}
.site-foot a{color:var(--muted);display:block;padding:3px 0}
.site-foot a:hover{color:var(--text)}
.foot-legal{border-top:1px solid var(--line);padding-top:16px;font-size:.8rem}
@media(min-width:880px){.site-foot{padding-bottom:34px}}

/* breadcrumb */
.crumbs{font-size:.82rem;color:var(--muted);padding:14px 0 0}
.crumbs a{color:var(--muted)}

/* verdict box on reviews */
.verdict{background:linear-gradient(var(--card),var(--card)) padding-box,var(--grad) border-box;border:2px solid transparent;border-radius:var(--r);padding:20px;margin:20px 0}