:root{
  --green:#006064;
  --green-2:#00777a;
  --ink:#0b1113;
  --gray:#566168;
  --muted:#6b747b;
  --line:#e2e8ea;
  --light:#f5f8f8;
  --light-2:#eef6f6;
  --white:#ffffff;
  --max:1120px;
  --radius:18px;
  --shadow:0 18px 50px rgba(0,32,36,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:'Poppins',system-ui,-apple-system,Segoe UI,sans-serif;background:var(--white);color:var(--ink)}
a{color:var(--green);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.site-header{position:sticky;top:0;z-index:20;border-bottom:1px solid var(--line);background:rgba(255,255,255,.94);backdrop-filter:blur(10px)}
.nav{max-width:var(--max);margin:auto;padding:1rem;display:flex;align-items:center;justify-content:space-between;gap:1rem}
.brand{display:flex;align-items:center;gap:.6rem;min-width:150px;color:var(--ink);font-weight:600}.brand:hover{text-decoration:none}.brand img{height:36px}.brand-text{font-size:1.05rem;color:var(--green)}
.nav-links{display:flex;align-items:center;gap:1rem;flex-wrap:wrap;justify-content:flex-end}.nav-links a{font-size:.9rem;color:var(--gray)}.nav-links .nav-cta{background:var(--green);color:#fff;padding:.55rem 1.05rem;border-radius:999px}.nav-links .nav-cta:hover{text-decoration:none;background:var(--green-2)}
main{max-width:var(--max);margin:auto;padding:0 1rem 5rem}.narrow{max-width:900px}.article{max-width:860px}.section{padding:4.5rem 0}.section-tight{padding:3rem 0}.hero{display:grid;grid-template-columns:1.05fr .95fr;gap:3rem;align-items:center;padding:5rem 0 4rem}.eyebrow{display:inline-block;color:var(--green);background:var(--light-2);border:1px solid #cce4e4;padding:.36rem .72rem;border-radius:999px;font-size:.78rem;font-weight:600;letter-spacing:.02em}h1{font-size:3.25rem;line-height:1.08;letter-spacing:-.045em;margin:1rem 0 1.2rem}h2{font-size:2rem;line-height:1.2;letter-spacing:-.03em;margin:0 0 1rem}h3{font-size:1.12rem;margin:0 0 .65rem}.lead{font-size:1.06rem;line-height:1.72;color:var(--gray);max-width:48rem}p{line-height:1.72;color:#3f4a50}.small{font-size:.86rem;color:var(--muted);line-height:1.65}.muted{color:var(--muted)}
.btn-row{display:flex;gap:.85rem;flex-wrap:wrap;margin-top:1.8rem}.btn{display:inline-block;border-radius:999px;padding:.76rem 1.35rem;font-weight:600;border:1px solid transparent}.btn:hover{text-decoration:none}.btn-primary{background:var(--green);color:#fff}.btn-primary:hover{background:var(--green-2)}.btn-secondary{border-color:var(--green);color:var(--green);background:#fff}.btn-soft{background:var(--light-2);color:var(--green)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:1.4rem}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem}.card{border:1px solid var(--line);border-radius:var(--radius);background:#fff;padding:1.55rem;box-shadow:0 10px 30px rgba(0,0,0,.03)}.card-soft{background:var(--light);border:1px solid #dbe7e7}.callout{background:var(--light);border-left:4px solid var(--green);padding:1.5rem;border-radius:14px;margin:1.8rem 0}.checklist{list-style:none;margin:1rem 0 0;padding:0}.checklist li{margin:.7rem 0;padding-left:1.75rem;position:relative;color:#3f4a50;line-height:1.55}.checklist li:before{content:'✓';position:absolute;left:0;color:var(--green);font-weight:700}.xlist{list-style:none;margin:1rem 0 0;padding:0}.xlist li{margin:.7rem 0;padding-left:1.75rem;position:relative;color:#3f4a50;line-height:1.55}.xlist li:before{content:'×';position:absolute;left:0;color:#a23b3b;font-weight:700}.number-list{counter-reset:item;list-style:none;margin:1.5rem 0 0;padding:0}.number-list li{counter-increment:item;display:grid;grid-template-columns:44px 1fr;gap:1rem;margin:1rem 0;align-items:start}.number-list li:before{content:counter(item);width:36px;height:36px;border-radius:999px;background:var(--green);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}.split{display:grid;grid-template-columns:1fr 1fr;gap:2rem;align-items:start}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:16px;background:#fff}table{width:100%;border-collapse:collapse;min-width:640px}th,td{text-align:left;padding:1rem;border-bottom:1px solid var(--line);vertical-align:top}th{background:var(--light);font-weight:600}tr:last-child td{border-bottom:0}.form-panel{border:1px solid var(--line);border-radius:22px;padding:1.8rem;background:#fff;box-shadow:var(--shadow)}input,select,textarea{width:100%;padding:.8rem .9rem;border:1px solid #ccd8da;border-radius:12px;font:inherit;background:#fff}textarea{min-height:110px;resize:vertical}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:.9rem}.field{margin:.85rem 0}.field-full{grid-column:1/-1}.required-note{font-size:.8rem;color:var(--muted)}button.btn{cursor:pointer;font:inherit}.site-footer{border-top:1px solid var(--line);padding:2.5rem 1rem;background:#fbfdfd}.footer-inner{max-width:var(--max);margin:auto;display:grid;grid-template-columns:1.2fr 2fr 1fr;gap:2rem}.footer-links{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.footer-links a{display:block;margin:.45rem 0;color:var(--gray);font-size:.9rem}.footer-title{font-weight:600;margin-bottom:.4rem;color:var(--ink)}.pill{display:inline-block;border-radius:999px;padding:.25rem .65rem;background:var(--light-2);color:var(--green);font-size:.76rem;font-weight:600}.demo-shell{border:1px solid var(--line);border-radius:24px;background:linear-gradient(135deg,#fbffff,#f3fafa);box-shadow:var(--shadow);padding:1rem}.demo-top{display:flex;gap:.35rem;margin-bottom:.85rem}.dot{width:10px;height:10px;border-radius:999px;background:#c7d3d5}.mock-chat{background:#fff;border:1px solid var(--line);border-radius:18px;padding:1rem}.chat-row{margin:.7rem 0}.bubble{display:inline-block;max-width:88%;border-radius:16px;padding:.8rem 1rem;line-height:1.55;font-size:.9rem}.child-bubble{background:#e7f2f2;color:#213034}.ai-bubble{background:#f5f7f8;color:#28373d}.annotation{border-left:3px solid var(--green);padding:.7rem .85rem;background:#fbfdfd;border-radius:0 12px 12px 0;margin:.7rem 0 .2rem;font-size:.86rem;color:#3f4a50}.mini-panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:1rem}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}.stat{border:1px solid var(--line);border-radius:16px;padding:1rem;background:#fff}.stat strong{font-size:1.4rem;color:var(--green);display:block}.notice{font-size:.82rem;color:var(--muted);border-top:1px solid var(--line);padding-top:1rem;margin-top:1rem}.hidden{display:none!important}
.story-card img,.story-image{width:100%;border-radius:16px;border:1px solid var(--line);background:var(--light);display:block;margin-bottom:1rem}.hero-card{position:relative}.hero-card .mini-panel{margin-top:.9rem}.conversion-strip{display:grid;grid-template-columns:1.1fr .9fr;gap:1.2rem;align-items:center}.logo-mark{height:34px}.section-kicker{margin-bottom:1.2rem}.tag-row{display:flex;gap:.5rem;flex-wrap:wrap;margin:1rem 0}.tag{display:inline-block;background:var(--light-2);color:var(--green);border:1px solid #d2e5e5;border-radius:999px;padding:.3rem .65rem;font-size:.78rem;font-weight:600}.quote{font-size:1.15rem;line-height:1.75;color:#23343a}.byline{font-weight:600;color:var(--ink)}
@media(max-width:940px){.hero,.split,.grid2,.conversion-strip{grid-template-columns:1fr}.grid3,.grid4,.stat-grid{grid-template-columns:1fr}.nav{align-items:flex-start}.nav-links{gap:.7rem}.nav-links a{font-size:.82rem}h1{font-size:2.35rem}.section{padding:3.4rem 0}.footer-inner{grid-template-columns:1fr}.footer-links{grid-template-columns:1fr 1fr}.form-grid{grid-template-columns:1fr}.field-full{grid-column:auto}}@media(max-width:600px){.nav-links a:not(.nav-cta){display:none}.footer-links{grid-template-columns:1fr}.btn{width:100%;text-align:center}.hero{padding-top:3.5rem}}

/* Prototype access page */
.prototype-summary .card strong{display:block;font-size:1.7rem;color:var(--green);line-height:1.1;margin-bottom:.35rem}.prototype-summary .card span{color:var(--muted);font-size:.9rem}.prototype-form h3{margin-top:1.8rem;padding-top:1.2rem;border-top:1px solid var(--line)}.prototype-form h3:first-of-type{margin-top:0;padding-top:0;border-top:0}.prototype-form label{font-size:.84rem;font-weight:600;color:#2d3a40}.prototype-form .field label{display:block;margin-bottom:.35rem}.form-optional{border:1px solid var(--line);border-radius:14px;padding:1rem;margin:1rem 0;background:#fbfdfd}.form-optional summary{cursor:pointer;font-weight:600;color:var(--green)}.checkbox-line{display:flex;gap:.65rem;align-items:flex-start;margin:.9rem 0;line-height:1.55;font-weight:500!important;color:#3f4a50!important}.checkbox-line input{width:auto;margin-top:.25rem}.prototype-announcement{border-left-color:var(--green);background:linear-gradient(135deg,#f4fbfb,#ffffff)}

/* School beta access */
.school-announcement{border-left-color:var(--green);background:linear-gradient(135deg,#ffffff,#f4fbfb)}
.school-announcement .btn-row{align-items:center}


/* Teacher beta access */
.teacher-announcement{border-left-color:var(--green);background:linear-gradient(135deg,#f6fbfb,#ffffff)}