/* ══════════════════════════════════════════════════════════════════
   ChessForge — Landing
   Editorial broadsheet × dark product. Serif headers, no AI-slop.
   ══════════════════════════════════════════════════════════════════ */

:root{
  --bg:#07070d;
  --bg-2:#0c0c13;
  --panel:#101018;
  --ink:#f3f2ee;          /* warm off-white text */
  --ink-dim:#9a9aa6;
  --ink-faint:#5c5c68;
  --line:#1e1e28;
  --cyan:#00d4ff;         /* the one strong accent */
  --cyan-deep:#0092b3;
  --paper:#ece4d2;        /* cream pop */
  --amber:#ffcf6a;        /* the one unexpected pop, used once */
  --red:#ff5d6c;
  --serif:'Instrument Serif', Georgia, serif;
  --sans:'Satoshi','Segoe UI', system-ui, sans-serif;
  --edge: clamp(1.25rem, 5vw, 6rem);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{
  background:var(--bg);color:var(--ink);
  font-family:var(--sans);font-size:17px;line-height:1.6;font-weight:500;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
em{font-style:italic}
::selection{background:var(--cyan);color:#04141a}

/* shared type ---------------------------------------------------------- */
.eyebrow{
  font-family:var(--sans);font-weight:700;font-size:.72rem;
  letter-spacing:.28em;text-transform:uppercase;color:var(--cyan);
  margin-bottom:1.4rem;
}
.big-serif{
  font-family:var(--serif);font-weight:400;
  font-size:clamp(2.4rem,6vw,5rem);line-height:1.02;letter-spacing:-.01em;
  color:var(--ink);
}
.big-serif em{color:var(--cyan);font-style:italic}

/* buttons -------------------------------------------------------------- */
.btn{
  display:inline-flex;align-items:center;gap:.4rem;
  font-family:var(--sans);font-weight:700;font-size:.98rem;
  padding:.85rem 1.6rem;border-radius:999px;cursor:pointer;
  border:1px solid transparent;transition:transform .35s cubic-bezier(.2,.9,.25,1.4), background .25s, color .25s, box-shadow .25s;
  will-change:transform;
}
.btn-primary{background:var(--cyan);color:#04141a;box-shadow:0 0 0 rgba(0,212,255,0)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 14px 34px -12px rgba(0,212,255,.65)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{transform:translateY(-3px);border-color:var(--cyan);color:var(--cyan)}
.btn-block{display:flex;justify-content:center;width:100%}
.btn-lg{font-size:1.1rem;padding:1.1rem 2.4rem}

/* ══ NAV ══════════════════════════════════════════════════════════════ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:1.1rem var(--edge);
  transition:background .3s, backdrop-filter .3s, border-color .3s, padding .3s;
  border-bottom:1px solid transparent;
}
.nav.scrolled{
  background:rgba(7,7,13,.72);backdrop-filter:blur(14px);
  border-bottom-color:var(--line);padding-top:.8rem;padding-bottom:.8rem;
}
.brand{display:flex;align-items:baseline;gap:.05rem;font-size:1.3rem;letter-spacing:-.02em}
.brand-hex{color:var(--cyan);margin-right:.35rem;font-size:1rem}
.brand-serif{font-family:var(--serif);font-weight:400;font-size:1.45rem}
.brand-bold{font-family:var(--sans);font-weight:900}
.nav-links{display:flex;align-items:center;gap:2rem}
.nav-links a{font-size:.92rem;font-weight:500;color:var(--ink-dim);transition:color .2s}
.nav-links a:hover{color:var(--ink)}
.nav-cta{color:var(--cyan)!important;font-weight:700!important}
.nav-burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav-burger span{width:24px;height:2px;background:var(--ink);transition:.3s}

/* ══ HERO ═════════════════════════════════════════════════════════════ */
.hero{
  position:relative;min-height:100vh;
  padding:clamp(7rem,14vh,11rem) var(--edge) 4rem;
  display:flex;flex-direction:column;justify-content:center;
  overflow:hidden;
}
.hero-grain{
  position:absolute;inset:0;pointer-events:none;opacity:.5;
  background:
    radial-gradient(1px 1px at 20% 30%, rgba(255,255,255,.04) 50%, transparent 51%),
    radial-gradient(900px 500px at 85% -5%, rgba(0,212,255,.09), transparent 60%);
}
/* oversized screenprint knight — deliberately runs off the right edge */
.hero-knight{
  position:absolute;top:44%;right:-4vw;transform:translateY(-50%);
  z-index:0;pointer-events:none;line-height:.7;
  font-size:min(72vh,780px);
}
.hero-knight span{position:absolute;top:0;right:0;display:block}
.knight-ghost{color:var(--cyan);opacity:.16;transform:translate(-14px,10px)}
.knight-main{color:#0f0f18;-webkit-text-stroke:2px #23232e}
.hero-inner{position:relative;z-index:2;max-width:min(58rem,90%)}
.hero-h1{
  font-family:var(--serif);font-weight:400;
  font-size:clamp(3.1rem,9vw,7.4rem);line-height:.98;letter-spacing:-.02em;
  margin-left:-.05em;
}
.hero-h1 span{display:block}
.word-underline{position:relative;color:var(--cyan);width:max-content;padding-bottom:.12em}
.scribble{
  position:absolute;left:-2%;bottom:-.14em;width:104%;height:.4em;overflow:visible;
}
.scribble path{
  stroke-dasharray:640;stroke-dashoffset:640;
  animation:draw 1.1s .7s cubic-bezier(.6,0,.2,1) forwards;
}
@keyframes draw{to{stroke-dashoffset:0}}
.hero-tail{
  margin-top:2.4rem;max-width:34rem;
  margin-left:clamp(0rem,18vw,11rem);  /* off-center: subhead pushed right */
}
.hero-sub{font-size:1.22rem;color:var(--ink-dim);line-height:1.55}
.hero-sub em{color:var(--paper);font-style:italic}
.hero-cta{display:flex;gap:.9rem;margin-top:1.8rem;flex-wrap:wrap}
.hero-note{margin-top:1.1rem;font-size:.82rem;color:var(--ink-faint);letter-spacing:.01em}

/* interactive coach demo — overlaps hero, tucked top-right */
.hero-demo{
  position:absolute;z-index:3;top:clamp(6rem,15vh,9rem);right:var(--edge);
  width:min(340px,40vw);
}
.demo-window{
  background:var(--panel);border:1px solid var(--line);border-radius:8px;
  box-shadow:0 30px 80px -30px rgba(0,0,0,.9);overflow:hidden;
  transform:rotate(2.2deg);transition:transform .5s cubic-bezier(.2,.9,.25,1.4);
}
.hero-demo:hover .demo-window{transform:rotate(0deg) scale(1.02)}
.demo-topbar{
  display:flex;align-items:center;gap:.4rem;
  padding:.6rem .8rem;border-bottom:1px solid var(--line);background:var(--bg-2);
}
.demo-dot{width:8px;height:8px;border-radius:50%;background:#2a2a36}
.demo-title{margin-left:.5rem;font-size:.72rem;color:var(--ink-faint);font-weight:700;letter-spacing:.08em;text-transform:uppercase}
.demo-body{position:relative;padding:.9rem}
.demo-board{
  display:grid;grid-template-columns:repeat(8,1fr);
  aspect-ratio:1;border-radius:4px;overflow:hidden;
}
.demo-board .sq{position:relative;display:flex;align-items:center;justify-content:center;font-size:min(3.2vw,26px);line-height:1}
.demo-board .light{background:var(--paper)}
.demo-board .dark{background:#2b2b36}
.demo-board .pc-w{color:#141414}
.demo-board .pc-b{color:#0a0a0a}
.demo-board .hot{box-shadow:inset 0 0 0 3px rgba(255,93,108,.9)}
.demo-arrow{position:absolute;left:.9rem;top:.9rem;width:calc(100% - 1.8rem);height:calc(100% - 1.8rem);pointer-events:none;z-index:5}
.demo-arrow line{stroke:var(--cyan);stroke-width:4.5;stroke-linecap:round;opacity:0;filter:drop-shadow(0 2px 5px rgba(0,0,0,.5))}
.demo-arrow.show line{animation:arrowIn .5s forwards}
@keyframes arrowIn{to{opacity:.9}}
.demo-coach{
  display:flex;gap:.55rem;align-items:flex-start;
  margin-top:.8rem;padding:.7rem .8rem;background:var(--bg-2);
  border-left:3px solid var(--cyan);border-radius:0 6px 6px 0;
}
.demo-coach-avatar{
  flex-shrink:0;width:26px;height:26px;border-radius:6px;background:var(--cyan);
  color:#04141a;display:flex;align-items:center;justify-content:center;font-size:.95rem;
}
.demo-coach-text{font-size:.8rem;line-height:1.45;color:var(--ink)}
.demo-coach-text b{color:var(--cyan)}

/* ══ PROBLEM ══════════════════════════════════════════════════════════ */
.problem{position:relative;padding:clamp(5rem,12vh,9rem) var(--edge);overflow:hidden}
.ghost-number{
  position:absolute;right:-2vw;top:-2rem;z-index:0;pointer-events:none;
  font-family:var(--serif);font-size:min(42vw,560px);line-height:1;
  color:#0d0d15;font-weight:400;letter-spacing:-.04em;
}
.problem-inner{position:relative;z-index:1;max-width:52rem}
.problem .big-serif{margin-bottom:2.4rem}
.problem-cols{
  display:grid;grid-template-columns:1fr 1fr;gap:2.6rem;
  margin-left:clamp(0rem,10vw,7rem);max-width:40rem;
}
.problem-cols p{color:var(--ink-dim);font-size:1.04rem}
.problem-cols strong,.problem-cols em{color:var(--paper);font-weight:700}

/* ══ HOW IT WORKS ═════════════════════════════════════════════════════ */
.how{padding:clamp(5rem,12vh,9rem) var(--edge)}
.how-head{max-width:40rem;margin-bottom:4rem}
.how-head .big-serif{margin-top:.6rem}
.steps{list-style:none;max-width:60rem;margin:0 auto;position:relative}
.step{display:flex;gap:2rem;align-items:flex-start;max-width:40rem}
.step-l{margin-right:auto}
.step-r{margin-left:auto;flex-direction:row-reverse;text-align:right}
.step-num{
  font-family:var(--serif);font-size:clamp(3rem,8vw,6rem);line-height:.8;
  color:transparent;-webkit-text-stroke:1.5px var(--cyan);flex-shrink:0;
}
.step-body h3{font-family:var(--serif);font-weight:400;font-size:1.9rem;margin-bottom:.5rem}
.step-body p{color:var(--ink-dim);font-size:1.02rem}
.step-body em{color:var(--paper)}
.step-link{width:200px;height:90px;margin:0 auto;display:block;opacity:.7}
.step-link.flip{margin-left:auto;margin-right:0}

/* ══ FEATURES ═════════════════════════════════════════════════════════ */
.features{padding:clamp(5rem,12vh,9rem) var(--edge);background:var(--bg-2)}
.feat-head{max-width:42rem;margin-bottom:3.5rem}
.feat-head .big-serif{margin-top:.6rem}

/* hero feature — asymmetric, oversized */
.feat-hero{
  display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(2rem,5vw,5rem);
  align-items:center;margin-bottom:5rem;
}
.feat-tag{
  display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.2em;
  text-transform:uppercase;color:var(--amber);margin-bottom:1rem;
}
.feat-hero-copy h3{font-family:var(--serif);font-weight:400;font-size:clamp(2rem,4vw,3.2rem);line-height:1.05;margin-bottom:1.1rem}
.feat-hero-copy p{color:var(--ink-dim);font-size:1.08rem;max-width:30rem}
.feat-hero-copy em{color:var(--paper)}

/* mock coach card */
.coachcard{
  background:var(--panel);border:1px solid var(--line);border-radius:8px;
  padding:1.2rem;transform:rotate(-1.6deg);transition:transform .5s cubic-bezier(.2,.9,.25,1.4);
  box-shadow:0 40px 90px -40px rgba(0,0,0,.9);
}
.feat-hero:hover .coachcard{transform:rotate(0)}
.coachcard-head{display:flex;align-items:center;gap:.7rem;margin-bottom:1rem}
.coachcard-avatar{width:42px;height:42px;border-radius:8px;background:var(--cyan);color:#04141a;display:flex;align-items:center;justify-content:center;font-size:1.3rem}
.coachcard-name{font-weight:900;font-size:.95rem}
.coachcard-status{font-size:.72rem;color:var(--amber);font-weight:700}
.coachcard-eval{margin-left:auto;font-weight:900;font-variant-numeric:tabular-nums;background:var(--bg-2);padding:.35rem .6rem;border-radius:6px;color:var(--cyan)}
.coachcard-q{
  position:relative;background:var(--bg-2);border-radius:0 8px 8px 8px;
  padding:.85rem 1rem;font-size:.92rem;line-height:1.5;margin:0 0 .9rem .5rem;
  border-left:3px solid var(--cyan);
}
.coachcard-q b{color:var(--cyan)}
.q-tail{position:absolute;left:-8px;top:14px;width:9px;height:9px;background:var(--bg-2);border-left:3px solid var(--cyan);transform:rotate(45deg)}
.coachcard-mcq{display:flex;flex-direction:column;gap:.45rem}
.mcq-row{background:var(--bg-2);border:1px solid var(--line);border-radius:6px;padding:.6rem .8rem;font-size:.86rem;font-weight:600;color:var(--ink-dim)}
.mcq-row.correct{border-color:var(--cyan);color:var(--cyan);background:rgba(0,212,255,.08)}

/* smaller features — staggered offsets, not a grid */
.feat-list{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(1.4rem,3vw,3rem);max-width:66rem}
.feat-item{padding-top:1.4rem;border-top:1px solid var(--line)}
.off-a{transform:translateY(0)}
.off-b{transform:translateY(2.4rem)}
.off-c{transform:translateY(-1.4rem)}
.feat-ic{font-size:1.8rem;margin-bottom:.8rem}
.feat-item h4{font-size:1.15rem;font-weight:900;margin-bottom:.5rem;letter-spacing:-.01em}
.feat-item p{color:var(--ink-dim);font-size:.96rem}

/* ══ PRICING ══════════════════════════════════════════════════════════ */
.pricing{padding:clamp(5rem,12vh,9rem) var(--edge)}
.price-head{max-width:40rem;margin-bottom:3.5rem}
.price-head .big-serif{margin-top:.6rem}
.price-layout{
  display:grid;grid-template-columns:.8fr 1.2fr;gap:clamp(1.5rem,4vw,4rem);
  align-items:end;max-width:64rem;
}
.plan{padding:2rem}
.plan-free{
  border:1px solid var(--line);border-radius:8px;background:var(--bg-2);
  opacity:.92;
}
.plan-pro{
  position:relative;border:1px solid var(--cyan);border-radius:10px;
  background:linear-gradient(180deg,rgba(0,212,255,.05),transparent);
  padding:2.6rem 2.4rem;box-shadow:0 40px 100px -50px rgba(0,212,255,.4);
}
.plan-badge{
  position:absolute;top:-.9rem;left:2rem;
  background:var(--amber);color:#2a1e00;font-weight:800;font-size:.74rem;
  padding:.4rem .9rem;border-radius:999px;letter-spacing:.01em;
}
.plan-name{font-family:var(--serif);font-weight:400;font-size:1.9rem;margin-bottom:.6rem}
.plan-price{display:flex;align-items:baseline;gap:.5rem;margin-bottom:1.6rem}
.plan-amt{font-family:var(--serif);font-size:clamp(2.6rem,5vw,4rem);line-height:1;color:var(--ink)}
.plan-pro .plan-amt{color:var(--cyan)}
.plan-strike{font-family:var(--serif);font-size:1.8rem;color:var(--ink-faint);text-decoration:line-through;text-decoration-color:var(--red)}
.plan-per{font-size:.9rem;color:var(--ink-faint);font-weight:600}
.plan-list{list-style:none;display:flex;flex-direction:column;gap:.75rem;margin-bottom:1.8rem}
.plan-list li{position:relative;padding-left:1.6rem;color:var(--ink-dim);font-size:.98rem}
.plan-list li::before{content:'';position:absolute;left:0;top:.55em;width:8px;height:8px;border-radius:50%;background:var(--ink-faint)}
.plan-list-pro li::before{background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
.plan-list-pro li{color:var(--ink)}
.plan-list-pro b{color:var(--cyan)}
.plan-fine{margin-top:1rem;text-align:center;font-size:.8rem;color:var(--ink-faint)}

/* ══ PROOF ════════════════════════════════════════════════════════════ */
.proof{padding:clamp(5rem,12vh,9rem) var(--edge);background:var(--bg-2);position:relative}
.proof-head{max-width:42rem;position:relative}
.quote-mark{
  position:absolute;top:-3.5rem;left:-1.5rem;font-family:var(--serif);
  font-size:12rem;line-height:1;color:#12121c;z-index:0;
}
.proof-head .big-serif,.proof-sub{position:relative;z-index:1}
.proof-sub{margin-top:1rem;color:var(--ink-dim);max-width:32rem}
.proof-slots{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;
  margin-top:3.5rem;max-width:62rem;
}
.slot{
  padding:1.8rem;border:1.5px dashed var(--line);border-radius:8px;
  background:transparent;
}
.slot p{font-family:var(--serif);font-size:1.5rem;color:var(--ink-faint);line-height:1.2;margin-bottom:1rem}
.slot footer{font-size:.82rem;color:var(--ink-faint);font-weight:600}

/* ══ FAQ ══════════════════════════════════════════════════════════════ */
.faq{padding:clamp(5rem,12vh,9rem) var(--edge)}
.faq-head{max-width:40rem;margin-bottom:3rem}
.faq-head .big-serif{margin-top:.6rem}
.faq-list{max-width:52rem}
.faq-item{border-top:1px solid var(--line);padding:.4rem 0}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:1rem;padding:1.5rem 0;font-family:var(--serif);font-size:clamp(1.3rem,2.6vw,1.8rem);
  color:var(--ink);transition:color .2s;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--cyan)}
.faq-plus{position:relative;flex-shrink:0;width:20px;height:20px}
.faq-plus::before,.faq-plus::after{content:'';position:absolute;background:var(--cyan);transition:transform .3s}
.faq-plus::before{top:9px;left:0;width:20px;height:2px}
.faq-plus::after{top:0;left:9px;width:2px;height:20px}
.faq-item[open] .faq-plus::after{transform:rotate(90deg);opacity:0}
.faq-item p{color:var(--ink-dim);padding:0 0 1.6rem;max-width:44rem;font-size:1.02rem;animation:faqIn .35s ease}
.faq-item em{color:var(--paper)}
@keyframes faqIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* ══ CLOSER ═══════════════════════════════════════════════════════════ */
.closer{padding:clamp(6rem,14vh,10rem) var(--edge);text-align:center}
.closer-inner{max-width:44rem;margin:0 auto}
.closer .big-serif{margin-bottom:2rem;font-size:clamp(2.6rem,7vw,5.5rem)}

/* ══ FOOTER ═══════════════════════════════════════════════════════════ */
.footer{padding:4rem var(--edge) 0;border-top:1px solid var(--line);overflow:hidden}
.footer-top{display:flex;justify-content:space-between;gap:3rem;flex-wrap:wrap;margin-bottom:3rem}
.footer-brand{font-size:1.4rem;font-weight:900;display:flex;align-items:center;gap:.4rem}
.footer-tag{margin-top:1rem;max-width:26rem;color:var(--ink-dim);font-size:.95rem}
.footer-tag em{color:var(--paper)}
.footer-links{display:flex;gap:4rem}
.footer-links h5{font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-faint);margin-bottom:1rem}
.footer-links a{display:block;color:var(--ink-dim);font-size:.95rem;margin-bottom:.6rem;transition:color .2s}
.footer-links a:hover{color:var(--cyan)}
/* huge wordmark running off the bottom edge — rule break */
.footer-wordmark{
  font-family:var(--serif);font-size:clamp(4rem,22vw,20rem);line-height:.72;
  color:#0d0d15;letter-spacing:-.03em;white-space:nowrap;
  margin-bottom:-.16em;user-select:none;
}
.footer-bottom{
  display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  padding:1.6rem 0;border-top:1px solid var(--line);
  font-size:.8rem;color:var(--ink-faint);
}

/* ══ SCROLL REVEAL ════════════════════════════════════════════════════ */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.2,.7,.2,1), transform .8s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.d1{transition-delay:.05s}.d2{transition-delay:.13s}.d3{transition-delay:.21s}
.d4{transition-delay:.32s}.d5{transition-delay:.42s}.d6{transition-delay:.52s}

@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .scribble path{animation:none;stroke-dashoffset:0}
  html{scroll-behavior:auto}
}

/* ══ RESPONSIVE ═══════════════════════════════════════════════════════ */
@media (max-width:1024px){
  .hero-demo{display:none}
  .hero-knight{opacity:.5}
  .feat-hero{grid-template-columns:1fr;gap:2.5rem}
  .price-layout{grid-template-columns:1fr}
  .plan-free{max-width:26rem}
}
@media (max-width:760px){
  body{font-size:16px}
  .nav-links{
    position:fixed;inset:0 0 auto;top:0;flex-direction:column;align-items:flex-start;
    gap:1.4rem;padding:6rem var(--edge) 2.5rem;background:rgba(7,7,13,.97);
    backdrop-filter:blur(16px);transform:translateY(-120%);transition:transform .4s cubic-bezier(.2,.9,.25,1.2);
    border-bottom:1px solid var(--line);
  }
  .nav-links.open{transform:translateY(0)}
  .nav-links a{font-size:1.3rem;font-family:var(--serif)}
  .nav-cta{font-family:var(--sans)!important}
  .nav-burger{display:flex;z-index:110}
  .nav-burger.x span:first-child{transform:translateY(3.5px) rotate(45deg)}
  .nav-burger.x span:last-child{transform:translateY(-3.5px) rotate(-45deg)}

  .hero-tail{margin-left:0}
  .hero-h1{font-size:clamp(2.8rem,13vw,4.5rem)}
  .problem-cols{grid-template-columns:1fr;gap:1.6rem;margin-left:0}
  .step,.step-r{flex-direction:row;text-align:left;margin:0}
  .step-r{flex-direction:row}
  .step-link{display:none}
  .steps{display:flex;flex-direction:column;gap:2.5rem}
  .feat-list{grid-template-columns:1fr;gap:0}
  .feat-item{transform:none!important;margin-top:1.6rem}
  .off-b,.off-c{transform:none}
  .proof-slots{grid-template-columns:1fr}
  .footer-top{flex-direction:column;gap:2rem}
  .footer-links{gap:3rem}
}