:root{
  --bg:#16181d;--bg2:#1b1e24;--card:#1f232a;--card-soft:#22262e;
  --ink:#fff;--grey:#9aa0a8;--grey-d:#6f757d;--line:#2a2e36;
  --red:#ff3b2f;--red2:#ff6a3d;--grad:linear-gradient(135deg,#ff3b2f 0%,#ff6a3d 100%);
  --head:'Poppins',system-ui,sans-serif;--body:'Mulish',system-ui,sans-serif;--radius:22px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
#idea,#principles,#survey,#shape,.surveysec{scroll-margin-top:78px}
#top{position:absolute;top:0}
body{font-family:var(--body);background:var(--bg);color:var(--ink);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
.wrap{max-width:1180px;margin:0 auto;padding:0 28px;position:relative;z-index:2}
.narrow{max-width:760px}
.mt{margin-top:26px}.mt0{margin-top:8px}
.grad-text{color:#ff2d20}

nav{position:sticky;top:0;z-index:50;background:rgba(22,24,29,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.navin{max-width:1180px;margin:0 auto;padding:15px 28px;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:9px;font-family:var(--head);font-weight:700;font-size:20px;color:#fff;text-decoration:none}
.logo:hover,.logo:visited,.logo:active{color:#fff;text-decoration:none}
.logo.sm{font-size:18px}
.logo .tri{width:0;height:0;border-style:solid;border-width:7px 0 7px 12px;border-color:transparent transparent transparent var(--red)}
.navlinks{display:none;gap:30px}
.navlinks a{color:var(--grey);text-decoration:none;font-size:15px;font-weight:500}
.navlinks a:hover{color:#fff}
.navright{display:flex;align-items:center;gap:18px}
.navright .login{color:var(--grey);text-decoration:none;font-size:15px;font-weight:500}
@media(min-width:900px){.navlinks{display:flex}}

.btn{display:inline-block;font-family:var(--body);font-weight:700;font-size:15px;border:none;cursor:pointer;padding:13px 26px;border-radius:40px;text-decoration:none;transition:transform .15s,box-shadow .15s}
.btn-red{background:var(--grad);color:#fff;box-shadow:0 10px 26px rgba(255,59,47,.32)}
.btn-red:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(255,59,47,.42)}
.btn-dark{background:rgba(22,24,29,.55);color:#fff;border:1.5px solid rgba(255,255,255,.7);backdrop-filter:blur(4px)}
.btn-dark:hover{background:rgba(22,24,29,.8);border-color:#fff}
.btn-sm{padding:10px 22px;font-size:14px}

.hero{position:relative;min-height:86vh;display:flex;align-items:center;text-align:center;
  background-image:linear-gradient(180deg,rgba(22,24,29,.45) 0%,rgba(22,24,29,.3) 45%,rgba(22,24,29,.8) 100%),url('img/hero.jpg');
  background-size:cover;background-position:center}
.hero h1{font-family:var(--head);font-weight:700;font-size:clamp(40px,7vw,72px);line-height:1.06;letter-spacing:-.01em;max-width:20ch;margin:0 auto;text-shadow:0 2px 24px rgba(0,0,0,.85),0 1px 4px rgba(0,0,0,.6)}
.hero .sub{position:relative;color:#fff;font-size:clamp(17px,2.3vw,20px);max-width:46ch;margin:24px auto 0;text-shadow:0 2px 14px rgba(0,0,0,.9)}
.hero .sub::before{content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:135%;height:230%;z-index:-1;pointer-events:none;
  background:radial-gradient(ellipse 60% 50% at 50% 50%,rgba(12,13,16,.72) 0%,rgba(12,13,16,.5) 45%,rgba(12,13,16,0) 75%)}
.pron{margin-top:14px;font-size:13px;color:#c3c7cc;font-style:italic}
.pron b{font-style:normal;color:#fff;font-weight:600}
.herobtns{margin-top:36px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.trustline{position:relative;margin-top:30px;font-size:13.5px;color:#cdd1d6;text-shadow:0 1px 12px rgba(0,0,0,.9)}
.trustline::before{content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:130%;height:300%;z-index:-1;pointer-events:none;
  background:radial-gradient(ellipse 60% 50% at 50% 50%,rgba(12,13,16,.7) 0%,rgba(12,13,16,.46) 45%,rgba(12,13,16,0) 75%)}
.trustline b{color:#fff;font-weight:600}

section{padding:74px 0;position:relative}
#idea{padding-top:90px;padding-bottom:0}
.center{text-align:center}
.kicker{font-family:var(--body);font-weight:700;font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--red);margin-bottom:14px}
h2{font-family:var(--head);font-weight:700;font-size:clamp(27px,4.4vw,42px);line-height:1.14;letter-spacing:-.01em}
.center h2{max-width:24ch;margin:0 auto}
.lead{color:var(--grey);font-size:17px;max-width:52ch;margin-top:16px}
.center .lead{margin:16px auto 0}

.cards{display:grid;grid-template-columns:1fr;gap:22px;margin-top:44px;margin-bottom:74px}
@media(min-width:760px){.cards{grid-template-columns:1fr 1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:34px;position:relative;overflow:hidden;isolation:isolate}
.card.glow{background:var(--grad);border:none}
.card h3{font-family:var(--head);font-weight:600;font-size:22px;line-height:1.25;margin-bottom:12px}
.card p{color:var(--grey);font-size:15.5px}
.card.glow p{color:rgba(255,255,255,.88)}

.band{position:relative;display:flex;align-items:center;justify-content:center;min-height:clamp(420px,56vw,680px);overflow:hidden;background:#101216;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.kb-stage{position:absolute;inset:0;z-index:0}
.kb-slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;
  transition:opacity 1.4s ease-in-out;transform:scale(1.0);will-change:opacity,transform}
.kb-slide:first-child{opacity:1}
.kb-stage.js .kb-slide:first-child{opacity:0}
.kb-stage.js .kb-slide.kb-on{opacity:1}
.kb-slide.kb-on{opacity:1;transform:scale(1.12);transition:opacity 1.4s ease-in-out,transform 6s ease-out}
.kb-scrim{position:absolute;inset:0;z-index:1;
  background:radial-gradient(ellipse 70% 60% at 50% 50%,rgba(16,18,22,.55) 0%,rgba(16,18,22,.32) 60%,rgba(16,18,22,.5) 100%),linear-gradient(180deg,rgba(22,24,29,.25) 0%,rgba(22,24,29,.2) 50%,rgba(22,24,29,.55) 100%)}
.band .wrap{position:relative;z-index:2;text-align:center}
.band .quote{max-width:1080px;margin:0 auto;text-align:center;transition:opacity .6s ease;text-shadow:0 2px 24px rgba(0,0,0,.9)}
.band .quote.fading{opacity:0}
.band .quote .ql{display:block;font-family:var(--head);font-weight:700;font-size:clamp(34px,6vw,68px);line-height:1.08;letter-spacing:-.015em}
.band .quote .ql em{color:#ff2d20;font-style:normal}
.band .quote .qa{display:block;margin-top:22px;font-family:var(--body);font-weight:600;font-size:clamp(16px,2.1vw,24px);letter-spacing:.02em;color:#fff;opacity:.92;text-shadow:0 1px 16px rgba(0,0,0,.95)}
.band .quote .qa::before{content:"\2192  ";color:#ff2d20}
@media (prefers-reduced-motion: reduce){
  .kb-slide{transform:none}
  .kb-slide.kb-on{transform:none;transition:opacity 1.4s ease-in-out}
}

/* hero overhead audience line */
.hero .overhead{display:inline-block;font-family:var(--body);font-weight:700;font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:#fff;opacity:.85;margin:0 auto 18px;padding:6px 14px;border:1px solid rgba(255,255,255,.22);border-radius:999px;background:rgba(16,18,22,.45)}

/* How it works section */
.how{padding-top:84px}
.how-steps{display:grid;grid-template-columns:1fr;gap:18px;margin-top:40px}
@media(min-width:760px){.how-steps{grid-template-columns:repeat(3,1fr)}}
.how-step{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;position:relative}
.how-step .how-num{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:var(--grad);color:#fff;font-family:var(--head);font-weight:700;margin-bottom:14px}
.how-step h3{font-family:var(--head);font-weight:600;font-size:20px;margin-bottom:8px}
.how-step p{color:var(--grey);font-size:15px;line-height:1.55}
.how-example{margin-top:32px;background:var(--card-soft);border-left:3px solid var(--red);border-radius:8px;padding:20px 24px;display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.how-example .ex-tag{font-family:var(--body);font-weight:700;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--red);background:rgba(255,45,32,.12);padding:5px 10px;border-radius:4px;flex-shrink:0}
.how-example p{color:var(--grey);font-size:15px;line-height:1.6;margin:0;flex:1;min-width:260px}
.how-example .ex-arrow{color:var(--red);font-weight:700;margin:0 6px}
.how-example b{color:#fff}

/* audience tags on cards */
.tag{display:inline-block;font-family:var(--body);font-weight:700;font-size:11px;letter-spacing:.12em;text-transform:uppercase;padding:5px 10px;border-radius:4px;margin-bottom:14px}
.tag-free{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.18)}
.tag-paid{background:rgba(0,0,0,.32);color:#fff;border:1px solid rgba(255,255,255,.22)}

/* operator block */
.operators{margin-top:54px;margin-bottom:32px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:36px}
.op-kicker{font-family:var(--body);font-weight:700;font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--red);margin-bottom:12px}
.op-title{font-family:var(--head);font-weight:600;font-size:clamp(22px,2.6vw,28px);line-height:1.2;margin-bottom:20px;max-width:32ch}
.op-points{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr;gap:14px}
@media(min-width:760px){.op-points{grid-template-columns:repeat(3,1fr)}}
.op-points li{color:var(--grey);font-size:15px;line-height:1.55;padding-left:22px;position:relative}
.op-points li::before{content:"→";position:absolute;left:0;top:0;color:var(--red);font-weight:700}
.op-points b{color:#fff;display:block;margin-bottom:4px}
.op-cta{margin-top:24px;margin-bottom:0}
.link-red{color:var(--red);font-weight:600;text-decoration:none;border-bottom:1px solid transparent;transition:border-color .2s}
.link-red:hover{border-bottom-color:var(--red)}

/* halved principles grid */
.pgrid4{display:grid;grid-template-columns:1fr;gap:18px;margin-top:40px}
@media(min-width:760px){.pgrid4{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.pgrid4{grid-template-columns:repeat(4,1fr)}}

.principles{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.pgrid{display:grid;grid-template-columns:1fr;gap:18px;margin-top:42px}
@media(min-width:680px){.pgrid{grid-template-columns:1fr 1fr}}
@media(min-width:980px){.pgrid{grid-template-columns:1fr 1fr 1fr 1fr}}
.principle{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:24px;transition:transform .15s,border-color .15s}
.principle:hover{transform:translateY(-3px);border-color:var(--red)}
.principle .num{font-family:var(--head);font-weight:700;font-size:14px;color:var(--red);letter-spacing:.08em}
.principle h4{font-family:var(--head);font-weight:600;font-size:17px;margin:8px 0;line-height:1.25}
.principle p{color:var(--grey);font-size:14px;line-height:1.5}
.principle.glow2{background:var(--grad);border:none}
.principle.glow2 .num{color:#fff}.principle.glow2 p{color:rgba(255,255,255,.9)}
.methodlead{text-align:center;max-width:60ch;margin:54px auto 0;color:var(--grey);font-size:16px}
.methodlead strong{color:#fff}
.method{margin-top:24px;display:grid;grid-template-columns:1fr;gap:16px}
@media(min-width:760px){.method{grid-template-columns:repeat(3,1fr)}}
.mstep{background:var(--card-soft);border:1px solid var(--line);border-radius:18px;padding:26px}
.mstep .mn{font-family:var(--head);font-weight:700;color:var(--red);font-size:13px;letter-spacing:.1em;margin-bottom:8px}
.mstep h4{font-family:var(--head);font-weight:600;font-size:17px;margin-bottom:8px}
.mstep p{color:var(--grey);font-size:14.5px;line-height:1.55}
.mstep p b{color:#fff}

.surveysec{position:relative;
  background-image:linear-gradient(180deg,rgba(22,24,29,.3),rgba(22,24,29,.5)),url('img/survey.jpg');
  background-size:cover;background-position:center 30%;background-attachment:fixed;border-bottom:1px solid var(--line)}
.survey{background:rgba(31,35,42,.82);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:clamp(26px,5vw,52px);box-shadow:0 40px 90px rgba(0,0,0,.5);max-width:1180px;margin:0 auto}
.survey .roles3,.survey .substep{max-width:none}
.survey .intro{color:var(--grey);font-size:16.5px;max-width:52ch;margin-top:14px}
.step{margin-top:32px}
.qlabel{font-family:var(--head);font-weight:600;font-size:clamp(18px,2.4vw,21px);line-height:1.35;margin-bottom:16px}
.qlabel .n{display:block;font-family:var(--body);font-weight:700;font-size:12px;letter-spacing:.14em;color:var(--red);margin-bottom:6px}
.roles{display:grid;grid-template-columns:1fr;gap:12px}
@media(min-width:640px){.roles{grid-template-columns:1fr 1fr 1fr}}
.roles3{grid-template-columns:1fr}
@media(min-width:680px){.roles3{grid-template-columns:repeat(3,1fr)}}
.substep{margin-top:6px}
.role{background:var(--card-soft);border:1.5px solid var(--line);color:#fff;text-align:left;padding:18px;border-radius:16px;cursor:pointer;font-family:var(--body);font-size:14.5px;line-height:1.45;transition:all .15s}
.role b{display:block;font-family:var(--head);font-weight:600;font-size:16px;margin-bottom:6px}
.role:hover{border-color:var(--red);transform:translateY(-2px)}
.role.sel{border-color:var(--red);background:rgba(255,59,47,.10)}
textarea,input[type=email]{width:100%;background:var(--card-soft);border:1.5px solid var(--line);color:#fff;font-family:var(--body);font-size:16px;padding:14px;border-radius:14px;resize:vertical;transition:border-color .15s}
textarea:focus,input:focus{outline:none;border-color:var(--red)}
textarea{min-height:84px}
.chips{display:flex;gap:10px;flex-wrap:wrap;margin-top:4px}
.chip{background:var(--card-soft);border:1.5px solid var(--line);color:#fff;padding:10px 18px;border-radius:40px;cursor:pointer;font-size:14px;font-weight:500;transition:all .15s}
.chip:hover{border-color:var(--red)}
.chip.sel{background:var(--grad);border-color:transparent;color:#fff;font-weight:600}
.hidden{display:none}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.submitbtn{margin-top:0}
.note{font-size:13px;color:var(--grey-d);margin-top:16px;line-height:1.55}
.progress{height:4px;background:#2a2e36;border-radius:3px;overflow:hidden;margin-top:24px}
.progress>i{display:block;height:100%;width:33%;background:var(--grad);transition:width .4s}

/* one-question-per-screen stepper */
.qprogress{margin-bottom:24px}
.qprogress #qcount{display:block;font-family:var(--body);font-weight:700;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--red);margin-bottom:10px}
.qbar{height:5px;background:#2a2e36;border-radius:3px;overflow:hidden}
.qbar>i{display:block;height:100%;width:14%;background:var(--grad);transition:width .45s ease}
.qstep{min-height:150px;animation:qfade .4s ease}
@keyframes qfade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.qstep .opt{color:var(--grey-d);font-weight:500;font-size:.8em}
.qnav{display:flex;gap:14px;align-items:center;margin-top:28px}
.qnav .btn{min-width:120px}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--grey)}
.btn-ghost:hover{border-color:var(--grey);color:#fff}

footer{padding:60px 0 46px;border-top:1px solid var(--line);background:var(--bg)}
.footcta{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;padding-bottom:40px;border-bottom:1px solid var(--line);margin-bottom:32px}
.footh{font-size:clamp(24px,3.4vw,32px)}
.footrow{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;color:var(--grey-d);font-size:13px}

.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s,transform .7s}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){.reveal{opacity:1;transform:none;transition:none}.btn:hover,.principle:hover,.role:hover{transform:none}}