*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --ink:#0A0C10;--ink2:#44495A;--ink3:#9198AA;
  --bg:#FAFAF8;--bg2:#F2F1ED;--bg3:#E8E6DF;
  --blue:#6366f1;--blue-bg:#EDF1FC;--border:#E0DDD6;
  --dark:#0D1117;--dark2:#161B22;
  --serif:'Sora',sans-serif;--sans:'Inter',sans-serif;--mono:'JetBrains Mono',monospace;
}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--ink);line-height:1.6;overflow-x:hidden}
nav{position:fixed;top:0;left:0;right:0;z-index:100;display:flex;align-items:center;justify-content:space-between;padding:0 40px;height:60px;background:#0D1117;border-bottom:1px solid rgba(255,255,255,0.07);box-shadow:0 1px 16px rgba(0,0,0,0.28)}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none}
.nav-logo svg{width:28px;height:28px}
.nav-brand{font-family:var(--sans);font-size:15px;font-weight:500;color:rgba(255,255,255,0.9)}
.nav-brand b{color:#818cf8;font-weight:500}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-links a{font-size:13px;color:rgba(255,255,255,0.85);text-decoration:none;transition:color 0.15s}
.nav-links a:hover{color:#fff}
.nav-cta{font-size:13px;font-weight:500;color:#fff;background:var(--blue);padding:8px 18px;border-radius:6px;text-decoration:none;transition:opacity 0.15s}
.nav-cta:hover{opacity:0.88}

.hero{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:100px 40px 80px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-200px;left:50%;transform:translateX(-50%);width:900px;height:900px;background:radial-gradient(ellipse,rgba(45,91,227,0.06) 0%,transparent 70%);pointer-events:none}
.hero-inner{max-width:760px;position:relative}
.hero-badge{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11px;font-weight:500;color:var(--blue);background:var(--blue-bg);border:1px solid rgba(45,91,227,0.2);padding:5px 14px;border-radius:100px;margin-bottom:36px;letter-spacing:0.3px}
.hero-badge-dot{width:6px;height:6px;border-radius:50%;background:var(--blue)}
h1{font-family:var(--serif);font-size:clamp(44px,5.5vw,72px);font-weight:500;line-height:1.1;letter-spacing:-0.5px;color:var(--ink);margin-bottom:24px}
h1 i{font-style:normal;font-weight:300;color:var(--ink2)}
h1 i{font-style:italic;color:var(--blue)}
.hero-sub{font-size:17px;font-weight:300;color:var(--ink2);line-height:1.75;max-width:560px;margin:0 auto 40px}
.hero-actions{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:500;padding:12px 24px;border-radius:7px;text-decoration:none;border:none;cursor:pointer;transition:all 0.15s}
.btn-dark{color:#fff;background:var(--ink)}
.btn-dark:hover{background:#1e2330;transform:translateY(-1px)}
.btn-ghost{color:var(--ink2);background:transparent;border:1px solid var(--border)}
.btn-ghost:hover{border-color:var(--ink3);color:var(--ink)}
.hero-logos{margin-top:60px;display:flex;align-items:center;justify-content:center;gap:8px;font-size:12px;color:var(--ink3);font-family:var(--mono)}
.hero-logos span{background:var(--bg2);border:1px solid var(--border);padding:4px 10px;border-radius:4px;font-size:11px;color:var(--ink2)}
.loop{background:var(--dark)}
.loop-inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:repeat(5,1fr)}
.loop-step{padding:40px 32px;border-right:1px solid rgba(255,255,255,0.06);transition:background 0.2s}
.loop-step:last-child{border-right:none}
.loop-step:hover{background:rgba(255,255,255,0.03)}
.loop-n{font-family:var(--mono);font-size:10px;color:rgba(255,255,255,0.2);letter-spacing:1px;margin-bottom:16px}
.loop-name{font-family:var(--serif);font-size:20px;color:#fff;margin-bottom:8px}
.loop-step-active .loop-name{color:#6B9EFF}
.loop-desc{font-size:12px;color:rgba(255,255,255,0.38);line-height:1.65}
.section{padding:96px 40px;max-width:1160px;margin:0 auto}
.section-eyebrow{font-family:var(--mono);font-size:11px;letter-spacing:1.5px;color:var(--ink3);text-transform:uppercase;margin-bottom:20px}
.problem-layout{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.problem-h{font-family:var(--serif);font-size:clamp(32px,3.5vw,48px);font-weight:400;line-height:1.2;letter-spacing:-0.3px;margin-bottom:20px}
.problem-p{font-size:15px;color:var(--ink2);line-height:1.8;margin-bottom:12px}
.pain-items{display:flex;flex-direction:column;gap:10px}
.pain-item{display:flex;align-items:flex-start;gap:12px;padding:14px 18px;background:#fff;border:1px solid var(--border);border-radius:8px;font-size:14px;color:var(--ink2);line-height:1.5}
.pain-x{flex-shrink:0;width:18px;height:18px;border-radius:50%;background:#FEE2E2;display:flex;align-items:center;justify-content:center;margin-top:1px}
.pain-x svg{width:10px;height:10px;stroke:#DC2626;stroke-width:2.5;fill:none}
.personas-section{position:relative;background:linear-gradient(180deg,#F3F2EE 0%,#EFEEE9 52%,#F6F4EF 100%);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:96px 40px;overflow:hidden}
.personas-section::before{content:'';position:absolute;inset:-140px -120px auto auto;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(99,102,241,0.08) 0%,rgba(99,102,241,0.02) 40%,transparent 70%);pointer-events:none}
.personas-section::after{content:'';position:absolute;inset:auto auto -220px -180px;width:560px;height:560px;border-radius:50%;background:radial-gradient(circle,rgba(22,163,74,0.06) 0%,rgba(22,163,74,0.015) 42%,transparent 72%);pointer-events:none}
.personas-inner{max-width:1160px;margin:0 auto;position:relative;z-index:1}
.personas-header{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:end;margin-bottom:56px}
.personas-h{font-family:var(--serif);font-size:clamp(32px,3.5vw,48px);font-weight:400;line-height:1.2;letter-spacing:-0.3px}
.personas-sub{font-size:14px;color:var(--ink3);line-height:1.75;max-width:320px;margin-left:auto}
.personas-grid{display:grid;grid-template-columns:repeat(12,1fr);border:1px solid var(--border);border-radius:12px;overflow:hidden;background:var(--border);gap:1px}
.persona-card{grid-column:span 3;background:linear-gradient(180deg,#FFFFFF 0%,#FBFAF7 100%);padding:22px 18px;transition:background 0.15s,transform 0.2s ease,box-shadow 0.2s ease,border-color 0.2s ease;animation:personaIn 0.55s ease both;border:1px solid transparent;display:flex;flex-direction:column;cursor:pointer;position:relative}
.persona-card::after{content:'›';position:absolute;bottom:16px;right:16px;font-size:16px;color:var(--border);transition:color 0.15s;line-height:1;pointer-events:none}
.persona-card:hover::after{color:var(--blue)}
.persona-card:nth-child(n+9){grid-column:span 3}
.persona-card:nth-child(3n+1){background:linear-gradient(180deg,#FFFFFF 0%,#F8FAFF 100%)}
.persona-card:nth-child(3n+2){background:linear-gradient(180deg,#FFFFFF 0%,#FFFAF2 100%)}
.persona-card:nth-child(3n+3){background:linear-gradient(180deg,#FFFFFF 0%,#F6FBF7 100%)}
.persona-card:hover{background:#FFFFFF;transform:translateY(-2px);box-shadow:0 12px 20px rgba(10,12,16,0.06);border-color:rgba(99,102,241,0.22)}
.persona-card:nth-child(2){animation-delay:0.05s}
.persona-card:nth-child(3){animation-delay:0.1s}
.persona-card:nth-child(4){animation-delay:0.15s}
.persona-card:nth-child(5){animation-delay:0.2s}
.persona-card:nth-child(6){animation-delay:0.25s}
.persona-card:nth-child(7){animation-delay:0.3s}
.persona-card:nth-child(8){animation-delay:0.35s}
.persona-card:nth-child(9){animation-delay:0.4s}
.persona-card:nth-child(10){animation-delay:0.45s}
.persona-head{display:flex;align-items:center;gap:8px;margin-bottom:10px}
.persona-role-icon{width:16px;height:16px;color:#5364C7;flex-shrink:0}
.persona-card:nth-child(3n+2) .persona-role-icon{color:#B07A2D}
.persona-card:nth-child(3n+3) .persona-role-icon{color:#2F8B4E}
.persona-chip{font-family:var(--mono);font-size:10px;font-weight:500;color:var(--blue);background:var(--blue-bg);padding:2px 8px;border-radius:4px;display:inline-block;margin-bottom:0}
.persona-name{font-family:var(--serif);font-size:17px;font-weight:400;margin-bottom:6px;color:var(--ink);line-height:1.25}
.persona-desc{font-size:12px;color:var(--ink2);line-height:1.6}
.persona-cap{margin-top:10px;list-style:none;display:flex;flex-direction:column;gap:4px}
.persona-cap li{position:relative;padding-left:12px;font-size:11px;color:var(--ink2);line-height:1.5}
.persona-cap li::before{content:'';position:absolute;left:0;top:8px;width:5px;height:5px;border-radius:50%;background:var(--blue)}


body.modal-open{overflow:hidden}
.persona-modal{position:fixed;inset:0;z-index:300;display:flex;align-items:center;justify-content:center;padding:20px;opacity:0;visibility:hidden;pointer-events:none;transition:opacity 0.22s ease,visibility 0.22s ease}
.persona-modal[aria-hidden="false"]{opacity:1;visibility:visible;pointer-events:auto}
.persona-modal-backdrop{position:absolute;inset:0;background:rgba(13,17,23,0.55);backdrop-filter:blur(3px);opacity:0;transition:opacity 0.22s ease}
.persona-modal[aria-hidden="false"] .persona-modal-backdrop{opacity:1}
.persona-modal-panel{position:relative;z-index:1;width:min(720px,100%);max-height:85vh;overflow:auto;background:#fff;border:1px solid var(--border);border-radius:14px;padding:28px 28px 24px;box-shadow:0 22px 50px rgba(10,12,16,0.25);transform:translateY(10px) scale(0.98);opacity:0;transition:transform 0.24s ease,opacity 0.2s ease}
.persona-modal[aria-hidden="false"] .persona-modal-panel{transform:translateY(0) scale(1);opacity:1}
.persona-modal-close{position:absolute;top:18px;right:18px;border:1px solid var(--border);background:#fff;color:var(--ink2);font-family:var(--mono);font-size:11px;padding:6px 10px;border-radius:6px;cursor:pointer}
.persona-modal-close:hover{color:var(--ink);border-color:var(--ink3)}
.persona-modal-chip{display:inline-block;background:var(--blue-bg);color:var(--blue);font-family:var(--mono);font-size:11px;padding:3px 9px;border-radius:4px;margin-bottom:16px}
.persona-modal-title{font-family:var(--serif);font-size:34px;font-weight:400;line-height:1.1;letter-spacing:-0.2px;margin-bottom:12px}
.persona-modal-summary{font-size:15px;color:var(--ink2);line-height:1.7;max-width:620px}
.persona-modal-subhead{font-family:var(--mono);font-size:11px;letter-spacing:1px;text-transform:uppercase;color:var(--ink3);margin-top:22px;margin-bottom:12px}
.persona-modal-list{list-style:none;display:flex;flex-direction:column;gap:10px}
.persona-modal-list li{position:relative;padding-left:18px;font-size:14px;color:var(--ink2);line-height:1.65}
.persona-modal-list li::before{content:'';position:absolute;left:0;top:10px;width:7px;height:7px;border-radius:50%;background:var(--blue)}

@keyframes personaIn{
  from{opacity:0;transform:translateY(10px)}
  to{opacity:1;transform:translateY(0)}
}

@media (prefers-reduced-motion: reduce){
  .persona-card{animation:none}
  .persona-card:hover{transform:none}
  .persona-modal,.persona-modal-backdrop,.persona-modal-panel{transition:none}
}
.how-section{padding:96px 40px;max-width:1160px;margin:0 auto}
.how-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:48px}
.how-card{padding:32px;border-radius:10px;border:1px solid var(--border);background:#fff;transition:border-color 0.15s,transform 0.15s}
.how-card:hover{border-color:rgba(45,91,227,0.3);transform:translateY(-2px)}
.how-card-dark{background:var(--dark);border-color:var(--dark);grid-column:span 2}
.how-card-dark:hover{border-color:var(--dark2)}
.how-eyebrow{font-family:var(--mono);font-size:10px;letter-spacing:1.2px;color:var(--ink3);margin-bottom:16px;text-transform:uppercase}
.how-card-dark .how-eyebrow{color:rgba(255,255,255,0.25)}
.how-h{font-family:var(--serif);font-size:22px;font-weight:400;margin-bottom:10px;line-height:1.3}
.how-card-dark .how-h{color:#fff}
.how-p{font-size:14px;color:var(--ink2);line-height:1.75}
.how-card-dark .how-p{color:rgba(255,255,255,0.5)}
.how-title-limit{max-width:480px}
.quote-section{background:var(--blue);padding:80px 40px;text-align:center}
.quote-inner{max-width:740px;margin:0 auto}
blockquote{font-family:var(--serif);font-style:normal;font-weight:300;font-size:clamp(20px,2.5vw,28px);color:#fff;line-height:1.55;margin-bottom:28px}
.quote-src{font-family:var(--mono);font-size:11px;letter-spacing:1.5px;color:rgba(255,255,255,0.5);text-transform:uppercase}
.section-stripe{background:var(--bg2);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.cta-section{padding:120px 40px;max-width:640px;margin:0 auto;text-align:center}
.cta-h{font-family:var(--serif);font-size:clamp(36px,4vw,54px);font-weight:400;line-height:1.15;letter-spacing:-0.5px;margin-bottom:16px}
.cta-sub{font-size:15px;color:var(--ink2);margin-bottom:40px;line-height:1.7}
.form{display:flex;gap:10px;max-width:440px;margin:0 auto}
.form input{flex:1;padding:12px 16px;border:1px solid var(--border);border-radius:7px;font-family:var(--sans);font-size:14px;background:#fff;color:var(--ink);outline:none;transition:border-color 0.15s}
.form input:focus{border-color:var(--blue)}
.form input::placeholder{color:var(--ink3)}
.form button{padding:12px 22px;background:var(--ink);color:#fff;border:none;border-radius:7px;font-family:var(--sans);font-size:14px;font-weight:500;cursor:pointer;transition:all 0.15s;white-space:nowrap}
.form button:hover{background:#1e2330;transform:translateY(-1px)}

.page{padding:108px 40px 72px;max-width:1280px;margin:0 auto}
.intro{max-width:1100px;margin-bottom:36px}
.intro .section-eyebrow{margin-bottom:14px}
.page h1{font-size:clamp(38px,5vw,64px);letter-spacing:-0.4px;margin-bottom:16px}
.intro p{font-size:16px;color:var(--ink2);max-width:1100px;line-height:1.75}
.diagram-wrap{background:linear-gradient(180deg,#FFFFFF 0%,#F7F6F2 100%);border:1px solid var(--border);border-radius:16px;overflow:auto;box-shadow:0 20px 40px rgba(10,12,16,0.06)}
.diagram-canvas{width:100%;height:auto;display:block}
.legend{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-top:16px}
.legend-item{background:#fff;border:1px solid var(--border);border-radius:8px;padding:10px 12px;font-size:12px;color:var(--ink2)}
.legend-item b{font-family:var(--mono);font-size:11px;color:var(--ink)}

footer{border-top:1px solid var(--border);padding:28px 40px;display:flex;justify-content:space-between;align-items:center}
footer p{font-family:var(--mono);font-size:11px;color:var(--ink3)}
footer a{font-family:var(--mono);font-size:11px;color:var(--ink3);text-decoration:none;transition:color 0.15s}
footer a:hover{color:var(--ink)}
.footer-note-wrap{display:flex;gap:24px;align-items:center;flex-wrap:wrap}
.footer-note{font-family:var(--mono);font-size:10px;color:var(--ink3);max-width:600px;line-height:1.5}

.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:4px;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:22px;height:2px;background:rgba(255,255,255,0.7);border-radius:2px;transition:all 0.25s}

@media(max-width:1024px){
  .legend{grid-template-columns:1fr 1fr}
  .personas-grid{grid-template-columns:repeat(2,1fr)}
  .persona-card{grid-column:span 1}
  .persona-card:nth-child(n+5){grid-column:span 1}
}

/* ===== Changelog ===== */
.nav-links a[aria-current="page"]{color:#fff;font-weight:500}
.changelog-page{padding:108px 40px 96px;max-width:800px;margin:0 auto}
.changelog-page-header{margin-bottom:64px;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,0.08)}
.changelog-page-title{font-family:var(--serif);font-size:clamp(36px,4vw,52px);font-weight:400;line-height:1.15;letter-spacing:-0.3px;margin-bottom:12px;color:rgba(255,255,255,0.95)}
.changelog-page-sub{font-size:15px;color:rgba(255,255,255,0.55);line-height:1.75}
.release{padding:56px 0;border-bottom:1px solid rgba(255,255,255,0.08);scroll-margin-top:80px}
.release:last-child{border-bottom:none}
.release-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:14px}
.release-badge{font-family:var(--mono);font-size:11px;font-weight:500;color:#818cf8;background:rgba(99,102,241,0.12);border:1px solid rgba(99,102,241,0.3);padding:4px 12px;border-radius:100px}
.release-date{font-family:var(--mono);font-size:12px;color:rgba(255,255,255,0.35)}
.release-title-row{display:flex;align-items:baseline;gap:10px;margin-bottom:16px}
.release-title{font-family:var(--serif);font-size:clamp(26px,3vw,38px);font-weight:400;line-height:1.2;letter-spacing:-0.2px;color:rgba(255,255,255,0.95)}
.release-anchor-link{font-family:var(--mono);font-size:15px;color:rgba(255,255,255,0.3);text-decoration:none;opacity:0;transition:opacity 0.15s;line-height:1}
.release:hover .release-anchor-link{opacity:1}
.release-anchor-link:hover{color:var(--blue)}
.release-intro{font-size:15px;color:rgba(255,255,255,0.6);line-height:1.8;margin-bottom:32px}
.release-divider{border:none;border-top:1px solid rgba(255,255,255,0.08);margin:0 0 32px}
.release-section{margin-bottom:36px}
.release-section-label{font-family:var(--mono);font-size:10px;letter-spacing:1.5px;text-transform:uppercase;color:rgba(255,255,255,0.3);margin-bottom:20px}
.release-subsection{margin-bottom:22px}
.release-subsection-title{font-size:15px;font-weight:500;color:rgba(255,255,255,0.9);margin-bottom:8px;display:flex;align-items:center;gap:8px}
.release-subsection-title::before{content:'';display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--blue);flex-shrink:0}
.release-subsection p{font-size:14px;color:rgba(255,255,255,0.6);line-height:1.8}
.release-list{list-style:none;display:flex;flex-direction:column;gap:8px}
.release-list li{position:relative;padding-left:18px;font-size:14px;color:rgba(255,255,255,0.6);line-height:1.7}
.release-list li::before{content:'';position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:rgba(255,255,255,0.15)}
.release-list.release-list-next li::before{background:var(--blue)}
.release-body code{font-family:var(--mono);font-size:11px;background:rgba(99,102,241,0.1);border:1px solid rgba(99,102,241,0.25);padding:2px 6px;border-radius:4px;color:#818cf8}
.release-links{margin-top:24px}
.release-link{display:inline-block;font-family:var(--mono);font-size:12px;color:#818cf8;text-decoration:none;border:1px solid rgba(99,102,241,0.3);padding:6px 16px;border-radius:6px;transition:background 0.15s,color 0.15s}
.release-link:hover{background:rgba(99,102,241,0.12);color:#a5b4fc}

@media(max-width:720px){
  .nav-toggle{display:flex}
  .nav-links{display:none;position:absolute;top:60px;left:0;right:0;flex-direction:column;background:#0D1117;border-bottom:1px solid rgba(255,255,255,0.07);padding:16px 20px;gap:0}
  .nav-links a{padding:12px 0;border-bottom:1px solid rgba(255,255,255,0.07);font-size:15px;color:rgba(255,255,255,0.6)}
  .nav-links a:last-child{border-bottom:none}
  nav.nav-open .nav-links{display:flex}
  nav.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  nav.nav-open .nav-toggle span:nth-child(2){opacity:0}
  nav.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  nav{padding:0 20px}
  .hero,.section,.personas-section,.how-section,.cta-section{padding-left:20px;padding-right:20px}
  .persona-modal-panel{padding:24px 18px 20px}
  .persona-modal-title{font-size:30px;padding-right:90px}
  .form{flex-direction:column}
  .page{padding:96px 20px 56px}
  footer{flex-direction:column;gap:10px;text-align:center}
  .changelog-page{padding-left:20px;padding-right:20px;padding-top:96px}
}
@media(max-width:960px){
  .problem-layout,.personas-header,.how-grid{grid-template-columns:1fr}
  .how-card-dark{grid-column:span 1}
  .personas-grid{grid-template-columns:1fr}
  .loop-inner{grid-template-columns:1fr 1fr}
  .loop-step{border-right:none;border-bottom:1px solid rgba(255,255,255,0.06)}
  .personas-sub{margin-left:0}
  .diagram-canvas{width:1300px;max-width:none}
  .legend{grid-template-columns:1fr}
}