/* ============================================================
   TopAI Surveys — Audience Intelligence Platform
   Global stylesheet
   ============================================================ */

:root{
  --ink:#080d1a;
  --ink-2:#0e1730;
  --ink-3:#16223f;
  --paper:#ffffff;
  --paper-2:#f6f8fc;
  --muted:#5c6880;
  --muted-dark:#9aa7bf;
  --line:#e4e9f3;
  --line-dark:rgba(255,255,255,.10);
  --brand:#4f46e5;
  --brand-2:#0ea5e9;
  --accent:#22d3ee;
  --ok:#10b981;
  --radius:16px;
  --radius-sm:10px;
  --maxw:1140px;
  --shadow:0 24px 60px -24px rgba(8,13,26,.45);
  --shadow-sm:0 10px 30px -18px rgba(8,13,26,.35);
  --font:"Inter","Segoe UI",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  line-height:1.6;
}
img,svg{max-width:100%}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.18;letter-spacing:-.02em;margin:0 0 .5em;font-weight:700}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.15em}
li{margin:.35em 0}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:999px;border:1px solid transparent;
  font-weight:600;font-size:.95rem;letter-spacing:-.01em;cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease;
  text-decoration:none;white-space:nowrap;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#fff;box-shadow:0 12px 30px -12px rgba(79,70,229,.65);
}
.btn-primary:hover{box-shadow:0 16px 38px -12px rgba(79,70,229,.8)}
.btn-ghost{background:rgba(255,255,255,.06);color:#fff;border-color:rgba(255,255,255,.22)}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-light{background:#fff;color:var(--ink);border-color:var(--line);box-shadow:var(--shadow-sm)}
.btn-light:hover{background:var(--paper-2)}
.btn-sm{padding:9px 16px;font-size:.865rem}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(8,13,26,.82);
  backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid var(--line-dark);
}
.header-inner{display:flex;align-items:center;gap:28px;height:72px}
.logo{
  display:flex;align-items:center;gap:11px;color:#fff;font-weight:700;
  font-size:1.02rem;letter-spacing:-.02em;text-decoration:none;flex-shrink:0;
}
.logo:hover{text-decoration:none}
.logo small{
  display:block;font-size:.66rem;font-weight:500;letter-spacing:.10em;
  text-transform:uppercase;color:var(--muted-dark);margin-top:1px;
}
.logo-mark{
  width:36px;height:36px;border-radius:11px;flex-shrink:0;
  display:grid;place-items:center;font-size:.82rem;font-weight:800;letter-spacing:-.03em;
  color:#fff;background:linear-gradient(140deg,#4f46e5,#0ea5e9 65%,#22d3ee);
  box-shadow:0 8px 20px -8px rgba(79,70,229,.9);
}
.nav{display:flex;align-items:center;gap:26px;margin-left:auto;flex-wrap:wrap}
.nav a{
  color:#c6d0e4;font-size:.9rem;font-weight:500;text-decoration:none;
  padding:6px 0;border-bottom:1px solid transparent;transition:color .16s ease;
}
.nav a:hover{color:#fff;text-decoration:none}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:8px}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(900px 520px at 12% -10%,rgba(79,70,229,.42),transparent 62%),
    radial-gradient(760px 460px at 88% 4%,rgba(14,165,233,.32),transparent 60%),
    linear-gradient(180deg,#080d1a 0%,#0a1120 100%);
  background-color:#080d1a;
  color:#eef2fa;
  padding:84px 0 96px;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(760px 420px at 50% 0%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(760px 420px at 50% 0%,#000 20%,transparent 78%);
}
.hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 14px;border-radius:999px;font-size:.78rem;font-weight:600;
  letter-spacing:.02em;color:#a9b8d8;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  margin-bottom:22px;
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:#22d3ee;box-shadow:0 0 0 4px rgba(34,211,238,.18)}
.hero h1{font-size:clamp(2.1rem,3.6vw,3.15rem);font-weight:800;letter-spacing:-.035em;margin-bottom:18px}
.grad{
  background:linear-gradient(100deg,#8b9cff,#22d3ee 55%,#5eead4);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero .lead{font-size:1.075rem;color:#b9c5dd;max-width:33em;margin-bottom:30px}
.hero-actions{display:flex;gap:13px;flex-wrap:wrap;margin-bottom:26px}
.hero-note{font-size:.8rem;color:#8593b0;display:flex;gap:18px;flex-wrap:wrap}
.hero-note span{display:inline-flex;align-items:center;gap:6px}
.hero-note i{font-style:normal;color:#22d3ee}

/* hero product mock */
.mock{
  border-radius:20px;padding:20px;
  background:linear-gradient(170deg,rgba(255,255,255,.10),rgba(255,255,255,.03));
  border:1px solid rgba(255,255,255,.14);
  box-shadow:0 40px 80px -40px rgba(0,0,0,.9);
  transform:perspective(1200px) rotateY(-6deg) rotateX(2deg);
}
.mock-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.mock-title{font-size:.82rem;font-weight:600;color:#dfe7f7}
.mock-acct{
  font-size:.68rem;color:#9fb0d0;background:rgba(34,211,238,.10);
  border:1px solid rgba(34,211,238,.34);border-radius:999px;padding:4px 10px;
  display:inline-flex;align-items:center;gap:6px;
}
.mock-kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:16px}
.kpi{background:rgba(8,13,26,.55);border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:11px 12px}
.kpi b{display:block;font-size:1.02rem;color:#fff;letter-spacing:-.02em}
.kpi small{font-size:.62rem;text-transform:uppercase;letter-spacing:.09em;color:#8b9bb9}
.kpi .up{color:#34d399;font-size:.68rem;font-weight:600}
.mock-chart{background:rgba(8,13,26,.55);border:1px solid rgba(255,255,255,.08);border-radius:12px;padding:12px 12px 6px;margin-bottom:14px}
.mock-rows{display:grid;gap:8px}
.mrow{display:grid;grid-template-columns:1fr 54px;gap:10px;align-items:center;font-size:.68rem;color:#a9b8d7}
.mrow .bar{height:6px;border-radius:99px;background:rgba(255,255,255,.10);overflow:hidden}
.mrow .bar span{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,#4f46e5,#22d3ee)}

/* ---------- trust strip ---------- */
.trust{background:#0a1120;border-top:1px solid var(--line-dark);border-bottom:1px solid var(--line-dark);padding:20px 0}
.trust-inner{display:flex;align-items:center;gap:14px 32px;flex-wrap:wrap;justify-content:center}
.trust span{font-size:.79rem;color:#8c9ab7;letter-spacing:.03em}
.trust b{color:#c9d5ea;font-weight:600}

/* ---------- sections ---------- */
.section{padding:88px 0}
.section.tight{padding:64px 0}
.section.alt{background:var(--paper-2)}
.section-head{max-width:44em;margin:0 auto 46px;text-align:center}
.kicker{
  font-size:.76rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand);margin-bottom:12px;
}
.section-head h2{font-size:clamp(1.6rem,2.5vw,2.2rem);margin-bottom:14px}
.section-head p{color:var(--muted);font-size:1.02rem;margin:0}

.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:0 22px 46px -24px rgba(8,13,26,.35);border-color:#cfd8ea}
.card .icon{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(140deg,rgba(79,70,229,.12),rgba(14,165,233,.14));
  color:var(--brand);font-size:1.05rem;margin-bottom:16px;font-weight:700;
}
.card h3{font-size:1.05rem;margin-bottom:8px}
.card p{color:var(--muted);font-size:.93rem;margin:0}
.card ul{padding-left:1.1em;margin:0;color:var(--muted);font-size:.92rem}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;counter-reset:s}
.step{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;
  position:relative;box-shadow:var(--shadow-sm);
}
.step::before{
  counter-increment:s;content:counter(s,decimal-leading-zero);
  font-size:.72rem;font-weight:800;letter-spacing:.1em;color:var(--brand-2);
  display:block;margin-bottom:12px;
}
.step h3{font-size:1rem;margin-bottom:8px}
.step p{color:var(--muted);font-size:.92rem;margin:0}
.step code{
  display:inline-block;font-size:.72rem;background:var(--paper-2);border:1px solid var(--line);
  border-radius:6px;padding:2px 7px;color:#334155;margin-top:10px;
}

/* split */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split h2{font-size:clamp(1.5rem,2.3vw,2rem);margin-bottom:16px}
.split p{color:var(--muted)}
.checklist{list-style:none;padding:0;margin:0}
.checklist li{
  display:flex;gap:12px;align-items:flex-start;padding:11px 0;
  border-bottom:1px solid var(--line);color:#25314a;font-size:.95rem;
}
.checklist li:last-child{border-bottom:0}
.checklist b{color:var(--ink)}
.checklist .tick{
  flex-shrink:0;width:21px;height:21px;border-radius:50%;display:grid;place-items:center;
  background:rgba(16,185,129,.12);color:#0f9d76;font-size:.72rem;font-weight:800;margin-top:2px;
}

/* badges */
.badges{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-top:26px}
.badge{
  font-size:.76rem;font-weight:600;color:#2a3852;
  background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 14px;
}

/* code panel */
.code-panel{
  background:#0b1224;border-radius:14px;padding:18px 20px;color:#c9d6ef;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.78rem;
  line-height:1.75;overflow:auto;box-shadow:var(--shadow);
  border:1px solid rgba(255,255,255,.08);
}
.code-panel .c-com{color:#5b6b8c}
.code-panel .c-key{color:#8ab4ff}
.code-panel .c-str{color:#7ee2c0}
.code-panel .c-fn{color:#f0b6ff}

/* faq */
.faq{max-width:56em;margin:0 auto;display:grid;gap:12px}
.faq details{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:16px 20px;box-shadow:var(--shadow-sm);
}
.faq summary{
  cursor:pointer;font-weight:600;font-size:.96rem;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:16px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--brand);font-weight:700;font-size:1.1rem}
.faq details[open] summary::after{content:"–"}
.faq p{color:var(--muted);font-size:.92rem;margin:12px 0 0}

/* cta */
.cta{
  position:relative;overflow:hidden;border-radius:24px;padding:56px 48px;color:#fff;
  background:
    radial-gradient(600px 300px at 12% 0%,rgba(79,70,229,.85),transparent 65%),
    radial-gradient(620px 320px at 88% 100%,rgba(14,165,233,.68),transparent 62%),
    #0a1120;
  border:1px solid rgba(255,255,255,.12);
  box-shadow:0 40px 80px -44px rgba(8,13,26,.8);
}
.cta h2{font-size:clamp(1.5rem,2.4vw,2rem);margin-bottom:12px}
.cta p{color:#c3cfe6;max-width:38em;margin-bottom:26px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* page head (inner pages) */
.page-head{
  background:
    radial-gradient(700px 300px at 20% 0%,rgba(79,70,229,.35),transparent 60%),
    radial-gradient(600px 280px at 84% 10%,rgba(14,165,233,.28),transparent 62%),
    #080d1a;
  color:#fff;padding:64px 0 56px;border-bottom:1px solid var(--line-dark);
}
.page-head h1{font-size:clamp(1.7rem,2.8vw,2.4rem);margin-bottom:10px}
.page-head p{color:#a9b8d5;margin:0;max-width:46em;font-size:.98rem}
.updated{font-size:.82rem!important;color:#8194b6!important}

/* prose (legal) */
.prose{max-width:52em;padding:64px 0 80px;font-size:.96rem;color:#2c374d}
.prose h2{font-size:1.22rem;margin:2.2em 0 .6em;color:var(--ink)}
.prose h3{font-size:1rem;margin:1.6em 0 .4em;color:var(--ink)}
.prose p,.prose li{color:#3c4a63}
.prose table{width:100%;border-collapse:collapse;margin:18px 0;font-size:.88rem}
.prose th,.prose td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.prose th{background:var(--paper-2);font-weight:600;color:var(--ink)}
.note{
  background:linear-gradient(135deg,rgba(79,70,229,.06),rgba(14,165,233,.06));
  border:1px solid #dbe3f5;border-left:4px solid var(--brand);
  border-radius:10px;padding:16px 20px;margin:22px 0;
}
.note p{margin:0;color:#33415c;font-size:.92rem}

/* pricing */
.pricing{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:start}
.price-card{
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:30px;
  box-shadow:var(--shadow-sm);position:relative;display:flex;flex-direction:column;
}
.price-card.featured{border-color:rgba(79,70,229,.5);box-shadow:0 26px 60px -30px rgba(79,70,229,.55)}
.price-card .pop{
  position:absolute;top:-12px;left:30px;font-size:.68rem;font-weight:700;letter-spacing:.08em;
  text-transform:uppercase;color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand-2));
  border-radius:999px;padding:5px 12px;
}
.price-card h3{font-size:1rem;margin-bottom:6px}
.price-card .desc{color:var(--muted);font-size:.85rem;min-height:2.6em;margin-bottom:18px}
.price{font-size:2.1rem;font-weight:800;letter-spacing:-.03em;margin-bottom:2px}
.price small{font-size:.8rem;font-weight:500;color:var(--muted)}
.price-card ul{list-style:none;padding:0;margin:20px 0 26px;font-size:.9rem;color:#3b4a64;flex:1}
.price-card li{padding:8px 0 8px 24px;position:relative}
.price-card li::before{
  content:"✓";position:absolute;left:0;color:var(--brand-2);font-weight:700;
}
.price-card .btn{width:100%}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;padding:64px 0 80px;align-items:start}
.contact-item{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}
.contact-item:last-child{border-bottom:0}
.contact-item .icon{
  width:38px;height:38px;border-radius:11px;display:grid;place-items:center;flex-shrink:0;
  background:linear-gradient(140deg,rgba(79,70,229,.12),rgba(14,165,233,.14));
  color:var(--brand);font-size:.95rem;
}
.contact-item h3{font-size:.95rem;margin-bottom:2px}
.contact-item p{margin:0;color:var(--muted);font-size:.88rem}
.field{margin-bottom:15px}
.field label{display:block;font-size:.8rem;font-weight:600;color:#33415c;margin-bottom:6px}
.field input,.field select,.field textarea{
  width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;
  font-family:inherit;font-size:.9rem;color:var(--ink);background:#fff;
  transition:border-color .16s ease,box-shadow .16s ease;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:0;border-color:var(--brand);box-shadow:0 0 0 3px rgba(79,70,229,.12);
}
.field textarea{min-height:110px;resize:vertical}
.form-hint{font-size:.75rem;color:var(--muted);margin:12px 0 0}

/* footer */
.site-footer{background:#080d1a;color:#93a1bd;padding:64px 0 26px;border-top:1px solid var(--line-dark)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding-bottom:36px}
.footer-about p{font-size:.86rem;color:#8493b1;margin-top:14px;max-width:24em}
.site-footer h4{color:#dbe4f5;font-size:.8rem;letter-spacing:.1em;text-transform:uppercase;margin-bottom:14px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin:0 0 9px}
.site-footer a{color:#93a1bd;font-size:.87rem;text-decoration:none}
.site-footer a:hover{color:#fff;text-decoration:none}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--line-dark);padding-top:22px;font-size:.79rem;color:#6f7f9e;
}
.disclaimer{font-size:.74rem;color:#61708c;margin-top:10px;max-width:70em}

/* ---------- demo login ---------- */
.login-wrap{
  min-height:calc(100vh - 72px);display:grid;place-items:center;padding:56px 24px;
  background:
    radial-gradient(720px 380px at 18% 0%,rgba(79,70,229,.38),transparent 62%),
    radial-gradient(640px 340px at 82% 8%,rgba(14,165,233,.28),transparent 60%),
    #080d1a;
}
.login-card{
  width:100%;max-width:420px;background:#fff;border-radius:20px;padding:34px;
  box-shadow:0 40px 90px -40px rgba(0,0,0,.7);
}
.login-card h1{font-size:1.3rem;margin-bottom:6px}
.login-card .sub{color:var(--muted);font-size:.88rem;margin-bottom:22px}
.demo-creds{
  background:var(--paper-2);border:1px dashed #c8d4ea;border-radius:10px;
  padding:13px 15px;font-size:.82rem;color:#33415c;margin-bottom:20px;
}
.demo-creds b{color:var(--ink)}
.demo-creds code{
  background:#fff;border:1px solid var(--line);border-radius:5px;padding:1px 6px;
  font-size:.8rem;color:#1e40af;
}
.alert{
  border-radius:10px;padding:11px 14px;font-size:.84rem;margin-bottom:16px;
}
.alert-error{background:#fef2f2;border:1px solid #fecaca;color:#b42318}
.alert-ok{background:#ecfdf5;border:1px solid #bbf7d0;color:#067647}
.login-foot{font-size:.76rem;color:var(--muted);text-align:center;margin-top:18px}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .mock{transform:none}
  .grid-3,.steps,.pricing{grid-template-columns:1fr 1fr}
  .split,.contact-grid{grid-template-columns:1fr;gap:34px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav{display:none}
  .header-actions{margin-left:auto}
}
@media (max-width:640px){
  .grid-3,.steps,.pricing,.grid-2{grid-template-columns:1fr}
  .section{padding:60px 0}
  .hero{padding:60px 0 68px}
  .cta{padding:40px 24px}
  .footer-grid{grid-template-columns:1fr}
}