/* ===========================================================
   TIA — Think in AI  ·  Landing page
   Brand: Green #00D26A · White #FFFFFF · Dark #0B0B0E · Gray #A0A3A8
   =========================================================== */

:root{
  --green:#00D26A;
  --green-soft:rgba(0,210,106,.14);
  --white:#FFFFFF;
  --bg:#0B0B0E;
  --bg-2:#101014;
  --gray:#A0A3A8;
  --gray-dim:#6E7177;
  --line:rgba(255,255,255,.09);
  --line-2:rgba(255,255,255,.055);
  --card:rgba(255,255,255,.025);
  --card-hover:rgba(255,255,255,.045);

  --font: -apple-system,BlinkMacSystemFont,"Inter","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-display: -apple-system,BlinkMacSystemFont,"Inter Tight","Inter","Segoe UI",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --wrap:1180px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
  --radius:16px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;
  background:var(--bg);
  color:var(--white);
  font-family:var(--font);
  font-size:17px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}

/* display font (matches muhammadroohullah.com: Inter Tight / SF Pro, tight tracking) */
.hero-title,.section-head,.stage h3,.final-head,.faq-item summary,.inside-card h3,
.core-tag,.fit-col h3{font-family:var(--font-display)}

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

/* selection + focus */
::selection{background:var(--green);color:#042;}
:focus-visible{outline:2px solid var(--green);outline-offset:3px;border-radius:4px}

.skip-link{position:fixed;left:-999px;top:10px;z-index:200;background:var(--green);color:#042;
  padding:10px 16px;border-radius:8px;font-weight:600}
.skip-link:focus{left:12px}

/* ---------- scroll progress ---------- */
.scroll-progress{position:fixed;top:0;left:0;height:2px;width:0;z-index:120;
  background:linear-gradient(90deg,var(--green),#5affa1);box-shadow:0 0 12px var(--green);
  transition:width .08s linear}

/* ---------- custom cursor ---------- */
.cursor{position:fixed;left:0;top:0;z-index:130;pointer-events:none;mix-blend-mode:difference;
  opacity:0;transition:opacity .3s}
.cursor-dot{position:absolute;width:6px;height:6px;border-radius:50%;background:#fff;
  transform:translate(-50%,-50%)}
.cursor-ring{position:absolute;width:38px;height:38px;border:1.5px solid rgba(255,255,255,.6);
  border-radius:50%;transform:translate(-50%,-50%);transition:width .25s var(--ease-out),
  height .25s var(--ease-out),border-color .25s}
.cursor.is-hover .cursor-ring{width:58px;height:58px;border-color:#fff}
body.cursor-ready .cursor{opacity:1}
@media (hover:none),(pointer:coarse){.cursor{display:none!important}}

/* =========================================================
   Buttons
   ========================================================= */
.btn{position:relative;display:inline-flex;align-items:center;gap:.5em;
  font-weight:600;font-size:15px;letter-spacing:.01em;line-height:1;
  padding:15px 26px;border-radius:999px;background:var(--green);color:#052013;
  border:1px solid var(--green);white-space:nowrap;cursor:pointer;
  transition:transform .35s var(--ease-out),box-shadow .35s var(--ease-out),background .25s;
  box-shadow:0 0 0 0 rgba(0,210,106,.5);will-change:transform}
.btn:hover{box-shadow:0 10px 40px -8px rgba(0,210,106,.55);background:#13e079}
.btn .arrow{transition:transform .3s var(--ease-out)}
.btn:hover .arrow{transform:translateX(4px)}
.btn-lg{padding:18px 34px;font-size:16px}
.btn-sm{padding:11px 20px;font-size:14px}
.btn-ghost{background:transparent;color:var(--white);border:1px solid var(--line);
  box-shadow:none}
.btn-ghost:hover{background:var(--card-hover);border-color:rgba(255,255,255,.25);box-shadow:none}

/* =========================================================
   Header
   ========================================================= */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;
  transition:background .4s var(--ease),border-color .4s,backdrop-filter .4s;
  border-bottom:1px solid transparent}
.site-header.scrolled{background:rgba(11,11,14,.72);backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:74px;gap:24px}
.brand img{height:40px;width:auto}
.nav{display:flex;gap:34px;margin-left:auto;margin-right:28px}
.nav a{font-size:14.5px;color:var(--gray);transition:color .2s;position:relative}
.nav a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:1px;background:var(--green);
  transition:width .3s var(--ease-out)}
.nav a:hover{color:#fff}.nav a:hover::after{width:100%}
@media (max-width:860px){.nav{display:none}.header-inner{height:64px}}

/* =========================================================
   Reveal animation
   ========================================================= */
[data-reveal]{opacity:0;transform:translateY(26px);
  transition:opacity .9s var(--ease-out),transform .9s var(--ease-out);
  transition-delay:calc(var(--d,0) * 90ms)}
[data-reveal].in-view{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  [data-reveal]{opacity:1!important;transform:none!important;transition:none!important}
}

/* =========================================================
   HERO
   ========================================================= */
.hero{position:relative;min-height:100svh;display:flex;flex-direction:column;
  justify-content:center;padding:120px 0 90px;overflow:hidden}
.hero-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:0}
.hero-grid{position:absolute;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(130% 90% at 72% 18%,rgba(0,210,106,.12),transparent 55%),
    radial-gradient(100% 80% at 50% 120%,rgba(0,210,106,.06),transparent 60%);
  mask-image:linear-gradient(#000,#000)}
.hero::after{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(180deg,transparent 60%,var(--bg) 100%)}
.hero-inner{position:relative;z-index:2}

.eyebrow{font-family:var(--mono);font-size:13px;letter-spacing:.28em;color:var(--green);
  display:flex;align-items:center;gap:12px;margin:0 0 26px;text-transform:uppercase}
.eyebrow i{color:var(--gray-dim);font-style:normal}
.eyebrow span{color:var(--green)}

.hero-title{font-size:clamp(44px,8.2vw,112px);line-height:.98;letter-spacing:-.03em;
  font-weight:800;margin:0;max-width:16ch}
.hero-title .line{display:block;overflow:hidden}
.hero-title em{font-style:normal;color:var(--gray)}
.hero-title .accent{color:var(--green)}
.hero-sub{font-size:clamp(17px,2vw,21px);color:var(--gray);max-width:46ch;margin:30px 0 0;
  line-height:1.5}
.hero-sub strong{color:#fff;font-weight:600}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin:38px 0 0}
.hero-note{font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;color:var(--gray-dim);
  margin:26px 0 0}

.scroll-hint{position:absolute;left:50%;bottom:30px;transform:translateX(-50%);z-index:3;
  width:26px;height:42px;border:1px solid var(--line);border-radius:14px;display:flex;
  justify-content:center;padding-top:8px}
.scroll-hint-line{width:2px;height:8px;background:var(--green);border-radius:2px;
  animation:scrollHint 1.8s var(--ease) infinite}
@keyframes scrollHint{0%{opacity:0;transform:translateY(0)}30%{opacity:1}
  70%{opacity:1}100%{opacity:0;transform:translateY(14px)}}

/* =========================================================
   Sections (shared)
   ========================================================= */
.section{position:relative;padding:clamp(90px,13vh,150px) 0;border-top:1px solid var(--line-2)}
.section-index{font-family:var(--mono);font-size:13px;letter-spacing:.14em;color:var(--green);
  margin:0 0 22px;text-transform:uppercase}
.section-head{font-size:clamp(30px,5vw,58px);line-height:1.04;letter-spacing:-.025em;
  font-weight:800;margin:0;max-width:18ch}
.section-head .muted{color:var(--gray)}
.section-lead{font-size:clamp(16px,1.8vw,19px);color:var(--gray);max-width:60ch;margin:26px 0 0;
  line-height:1.6}
.section-lead strong{color:#fff;font-weight:600}
.muted{color:var(--gray)}

.why-body{max-width:62ch;margin-top:30px;display:grid;gap:18px}
.why-body p{color:var(--gray);font-size:clamp(16px,1.8vw,19px);margin:0;line-height:1.65}

/* =========================================================
   02  Pipeline (scroll-scrubbed)
   ========================================================= */
.standard{padding-bottom:0}
.pipeline{position:relative;margin-top:40px;height:300vh}
.pipeline-sticky{position:sticky;top:0;height:100svh;display:flex;align-items:center;
  overflow:hidden}
.pipeline-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:0}
/* legibility scrim + vignette over the frame sequence */
.pipeline-sticky::after{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:
    linear-gradient(90deg,rgba(11,11,14,.94) 0%,rgba(11,11,14,.72) 34%,rgba(11,11,14,.18) 66%,rgba(11,11,14,.5) 100%),
    linear-gradient(0deg,rgba(11,11,14,.85),transparent 42%),
    linear-gradient(180deg,rgba(11,11,14,.9),transparent 18%)}
.pipeline-poster{display:none}
.pipeline-stages{position:relative;z-index:2;width:100%;min-height:50vh}
.stage{position:absolute;top:50%;max-width:560px;opacity:0;
  transform:translate(0,calc(-50% + 30px));
  transition:opacity .6s var(--ease-out),transform .6s var(--ease-out)}
.stage.active{opacity:1;transform:translate(0,-50%)}
.stage-num{font-family:var(--mono);font-size:13px;letter-spacing:.14em;color:var(--green)}
.stage h3{font-size:clamp(40px,7vw,86px);line-height:1;letter-spacing:-.03em;font-weight:800;
  margin:10px 0 18px}
.stage p{font-size:clamp(16px,1.9vw,20px);color:var(--gray);line-height:1.55;margin:0}

/* static fallback (mobile / reduced motion) */
.pipeline.is-static{height:auto}
.pipeline.is-static .pipeline-sticky{position:static;height:auto;display:block;padding:10px 0 0}
.pipeline.is-static .pipeline-canvas{display:none}
.pipeline.is-static .pipeline-stages{position:static}
.pipeline.is-static .stage{position:static;opacity:1;transform:none;max-width:none;
  padding:34px 0;border-top:1px solid var(--line-2)}
.pipeline.is-static .stage:first-child{border-top:0}
.pipeline.is-static .stage h3{font-size:clamp(34px,10vw,52px);margin:8px 0 12px}
.pipeline.is-static .pipeline-poster{display:block;width:100%;border-radius:var(--radius);
  margin:4px 0 8px;border:1px solid var(--line)}

/* =========================================================
   03  Rules
   ========================================================= */
.rules-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin-top:52px}
.rules-col{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:34px 32px}
.rules-label{font-family:var(--mono);font-size:13px;letter-spacing:.06em;color:#fff;
  margin:0 0 22px;display:flex;align-items:center;gap:10px}
.rules-label.muted-label{color:var(--gray)}
.dot{width:9px;height:9px;border-radius:50%;background:var(--green);display:inline-block;
  box-shadow:0 0 12px var(--green);flex:none}
.rules-list{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.rules-list li{position:relative;padding-left:30px;color:var(--gray);font-size:16px;line-height:1.4}
.rules-list.good li::before{content:"";position:absolute;left:0;top:3px;width:16px;height:16px;
  border-radius:50%;background:var(--green-soft);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2300D26A' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E");
  background-size:11px;background-repeat:no-repeat;background-position:center}
.rules-list.good li{color:#e9eaec}
.rules-list.bad li::before{content:"";position:absolute;left:2px;top:7px;width:11px;height:1.5px;
  background:var(--gray-dim)}
@media (max-width:760px){.rules-grid{grid-template-columns:1fr;gap:18px}}

/* =========================================================
   04  Core Hours
   ========================================================= */
.core-blocks{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:52px}
.core-block{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;min-height:180px;display:flex;flex-direction:column;
  transition:border-color .3s,background .3s,transform .4s var(--ease-out)}
.core-block:hover{border-color:rgba(0,210,106,.4);background:var(--card-hover);transform:translateY(-4px)}
.core-tag{font-weight:700;font-size:20px;letter-spacing:-.01em}
.core-p{color:var(--gray);font-size:15px;margin:12px 0 auto;line-height:1.45}
.core-fmt{font-family:var(--mono);font-size:11.5px;letter-spacing:.05em;color:var(--green);
  margin-top:18px;text-transform:uppercase}
.core-note{font-family:var(--mono);font-size:13px;color:var(--gray-dim);margin-top:26px}
@media (max-width:900px){.core-blocks{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.core-blocks{grid-template-columns:1fr}.core-block{min-height:0}}

/* =========================================================
   05  Inside grid
   ========================================================= */
.inside-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:52px}
.inside-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:32px 28px;transition:border-color .3s,background .3s,transform .4s var(--ease-out)}
.inside-card:hover{border-color:rgba(0,210,106,.35);background:var(--card-hover);transform:translateY(-4px)}
.inside-card h3{font-size:20px;margin:0 0 10px;letter-spacing:-.01em}
.inside-card p{color:var(--gray);font-size:15.5px;margin:0;line-height:1.5}
@media (max-width:860px){.inside-grid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.inside-grid{grid-template-columns:1fr}}

/* =========================================================
   06  Fit (for / not for)
   ========================================================= */
.fit-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin-top:46px}
.fit-col{border-radius:var(--radius);padding:38px 34px;border:1px solid var(--line)}
.fit-col.for{background:linear-gradient(180deg,rgba(0,210,106,.07),rgba(0,210,106,.01));
  border-color:rgba(0,210,106,.28)}
.fit-col.notfor{background:var(--card)}
.fit-col h3{display:flex;align-items:center;gap:11px;font-size:19px;margin:0 0 22px;letter-spacing:-.01em}
.fit-col.notfor h3{color:var(--gray)}
.fit-col ul{list-style:none;margin:0;padding:0;display:grid;gap:15px}
.fit-col li{color:#e9eaec;font-size:16.5px;line-height:1.45;padding-left:22px;position:relative}
.fit-col.for li::before{content:"+";position:absolute;left:0;color:var(--green);font-weight:700}
.fit-col.notfor li{color:var(--gray)}
.fit-col.notfor li::before{content:"–";position:absolute;left:0;color:var(--gray-dim);font-weight:700}
@media (max-width:760px){.fit-grid{grid-template-columns:1fr;gap:16px}}

/* =========================================================
   07  Structure
   ========================================================= */
.hierarchy{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;margin:40px 0 0}
.hierarchy span{font-family:var(--mono);font-size:14px;padding:10px 18px;border:1px solid var(--line);
  border-radius:999px;color:#fff;background:var(--card)}
.hierarchy span:first-child{border-color:rgba(0,210,106,.4);color:var(--green)}
.hierarchy i{color:var(--gray-dim);font-style:normal}
@media (max-width:620px){.hierarchy span{font-size:12.5px;padding:8px 13px}}

/* =========================================================
   FAQ
   ========================================================= */
.faq-list{margin-top:46px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;
  justify-content:space-between;gap:20px;padding:26px 4px;font-size:clamp(18px,2.4vw,24px);
  font-weight:600;letter-spacing:-.01em;transition:color .2s}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--green)}
.faq-icon{position:relative;width:18px;height:18px;flex:none}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--green);
  transition:transform .3s var(--ease-out)}
.faq-icon::before{top:8px;left:0;width:18px;height:2px}
.faq-icon::after{top:0;left:8px;width:2px;height:18px}
.faq-item[open] .faq-icon::after{transform:scaleY(0)}
.faq-item p{color:var(--gray);font-size:17px;line-height:1.6;margin:0;padding:0 4px 28px;max-width:70ch}

/* =========================================================
   Final CTA
   ========================================================= */
.final-cta{position:relative;overflow:hidden;text-align:center;
  padding:clamp(100px,16vh,180px) 0;border-top:1px solid var(--line)}
.cta-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:0}
.final-cta::after{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:radial-gradient(60% 80% at 50% 50%,rgba(0,210,106,.10),transparent 70%)}
.final-inner{position:relative;z-index:2;display:flex;flex-direction:column;align-items:center}
.final-inner .eyebrow{justify-content:center}
.final-head{font-size:clamp(32px,6vw,72px);line-height:1.03;letter-spacing:-.03em;font-weight:800;
  margin:0 0 6px;max-width:20ch}
.final-tag{font-size:clamp(17px,2.2vw,22px);color:var(--gray);margin:30px 0 0;font-weight:500}
.final-tag .accent{color:var(--green)}

/* =========================================================
   Footer
   ========================================================= */
.site-footer{border-top:1px solid var(--line);padding:70px 0 40px;background:var(--bg-2)}
.footer-inner{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;
  padding-bottom:40px;border-bottom:1px solid var(--line-2)}
.footer-brand img{height:38px;margin-bottom:16px}
.footer-brand p{color:var(--gray);max-width:36ch;font-size:15px;margin:0;line-height:1.5}
.footer-social{display:flex;gap:26px;flex-wrap:wrap;align-items:flex-start}
.footer-social a{font-size:14.5px;color:var(--gray);transition:color .2s;position:relative}
.footer-social a:hover{color:var(--green)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:16px;
  margin-top:28px;flex-wrap:wrap}
.footer-bottom span,.footer-mono{font-family:var(--mono);font-size:12.5px;color:var(--gray-dim);
  letter-spacing:.04em}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width:640px){
  body{font-size:16px}
  .wrap{padding:0 20px}
  .hero{padding:110px 0 80px}
  .hero-cta .btn{flex:1 1 auto;justify-content:center}
  .scroll-hint{display:none}
}