/* IDATHABOT Learn — one stylesheet, no external requests.
   Written mobile-first: most learners will open this on a phone, on metered data. */

:root{
  --ink:#0d1a16;
  --ink-soft:#3d4f48;
  --teal:#0e6b57;
  --teal-deep:#094c3e;
  --mint:#17b08a;
  --amber:#f2a03d;
  --sand:#fbf8f2;
  --card:#ffffff;
  --line:#e2e8e4;
  --shadow:0 1px 2px rgba(13,26,22,.05), 0 8px 24px rgba(13,26,22,.06);
  --radius:18px;
  --max:1120px;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  color:var(--ink);
  background:var(--sand);
  line-height:1.6;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
}
img,svg{max-width:100%;display:block}
a{color:var(--teal);text-decoration-thickness:2px;text-underline-offset:3px}
a:focus-visible,button:focus-visible{outline:3px solid var(--amber);outline-offset:3px;border-radius:6px}

.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:16px;background:#fff;padding:10px 14px;border-radius:10px;z-index:100}

/* ---------- header ---------- */
.site-head{
  position:sticky;top:0;z-index:50;
  background:rgba(251,248,242,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.site-head .wrap{display:flex;align-items:center;gap:16px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:750;letter-spacing:-.02em;font-size:1.02rem;color:var(--ink);text-decoration:none}
.brand .mark{width:34px;height:34px;flex:0 0 34px}
.brand small{display:block;font-weight:500;font-size:.72rem;color:var(--ink-soft);letter-spacing:.02em}
.nav{margin-left:auto;display:flex;align-items:center;gap:6px}
.nav a.navlink{
  display:none;color:var(--ink-soft);text-decoration:none;font-size:.94rem;
  padding:8px 10px;border-radius:9px;
}
.nav a.navlink:hover{background:#eef3f0;color:var(--ink)}
@media(min-width:860px){ .nav a.navlink{display:inline-block} }

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font:inherit;font-weight:650;text-decoration:none;border:0;cursor:pointer;
  padding:13px 20px;border-radius:12px;transition:transform .12s ease, box-shadow .12s ease, background .12s ease;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--teal);color:#fff;box-shadow:0 6px 18px rgba(14,107,87,.22)}
.btn-primary:hover{background:var(--teal-deep)}
.btn-ghost{background:#fff;color:var(--teal);border:1.5px solid #cfe0d9}
.btn-ghost:hover{background:#f3faf7}
.btn-sm{padding:10px 15px;font-size:.92rem;border-radius:10px}

/* ---------- hero ---------- */
.hero{padding:56px 0 40px;position:relative;overflow:hidden}
.hero .wrap{display:grid;gap:36px;align-items:center}
@media(min-width:900px){ .hero .wrap{grid-template-columns:1.08fr .92fr;gap:48px} }
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:#e8f6f0;color:var(--teal-deep);font-weight:650;font-size:.82rem;
  letter-spacing:.04em;text-transform:uppercase;
  padding:7px 12px;border-radius:999px;margin-bottom:18px;
}
.eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--mint)}
h1{
  font-size:clamp(2rem,5.2vw,3.1rem);
  line-height:1.08;letter-spacing:-.03em;margin:0 0 18px;font-weight:800;
}
h1 .accent{color:var(--teal);position:relative;white-space:nowrap}
h1 .accent::after{
  content:"";position:absolute;left:0;right:0;bottom:.06em;height:.28em;
  background:rgba(242,160,61,.35);border-radius:4px;z-index:-1;
}
.lede{font-size:1.12rem;color:var(--ink-soft);max-width:52ch;margin:0 0 26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:18px}
.free-note{display:flex;align-items:flex-start;gap:10px;font-size:.95rem;color:var(--ink-soft);max-width:50ch}
.free-note svg{flex:0 0 20px;margin-top:3px}

/* hero art */
.art{
  position:relative;border-radius:26px;background:linear-gradient(160deg,#0e6b57,#0a5a4a 55%,#094c3e);
  padding:26px;box-shadow:0 24px 60px rgba(9,76,62,.28);overflow:hidden;
}
.art::before{
  content:"";position:absolute;width:220px;height:220px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,rgba(242,160,61,.55),rgba(242,160,61,0) 70%);
  top:-70px;right:-60px;
}
.bubbles{display:grid;gap:12px;position:relative;z-index:1}
.bubble{
  background:#fff;border-radius:16px 16px 16px 6px;padding:13px 15px;
  font-size:.95rem;color:var(--ink);box-shadow:0 6px 18px rgba(0,0,0,.12);max-width:92%;
}
.bubble.me{
  margin-left:auto;border-radius:16px 16px 6px 16px;
  background:#e8f6f0;color:var(--teal-deep);font-weight:600;
}
.bubble .tick{color:var(--mint);font-weight:800}
.art-foot{color:#cfe9e1;font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;margin:16px 0 0;position:relative;z-index:1}

/* ---------- sections ---------- */
section.band{padding:64px 0}
section.band.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:60ch;margin-bottom:34px}
h2{font-size:clamp(1.45rem,3.2vw,2.05rem);line-height:1.15;letter-spacing:-.025em;margin:0 0 12px;font-weight:780}
.sec-head p{margin:0;color:var(--ink-soft);font-size:1.04rem}

.grid{display:grid;gap:18px}
@media(min-width:700px){ .grid.three{grid-template-columns:repeat(3,1fr)} .grid.two{grid-template-columns:repeat(2,1fr)} }
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);
}
.card h3{margin:0 0 8px;font-size:1.06rem;letter-spacing:-.01em}
.card p{margin:0;color:var(--ink-soft);font-size:.97rem}
.card .ico{
  width:44px;height:44px;border-radius:13px;display:grid;place-items:center;margin-bottom:16px;
  background:#e8f6f0;color:var(--teal);
}
.card .ico.amber{background:#fdf1e0;color:#a96b12}

/* steps */
.steps{counter-reset:s;display:grid;gap:16px}
@media(min-width:820px){ .steps{grid-template-columns:repeat(3,1fr)} }
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;position:relative}
.step::before{
  counter-increment:s;content:counter(s);
  position:absolute;top:-16px;left:22px;width:34px;height:34px;border-radius:50%;
  background:var(--teal);color:#fff;display:grid;place-items:center;font-weight:750;font-size:.95rem;
  box-shadow:0 6px 14px rgba(14,107,87,.25);
}
.step h3{margin:12px 0 6px;font-size:1.02rem}
.step p{margin:0;color:var(--ink-soft);font-size:.95rem}

/* subjects */
.chips{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 18px;padding:0;list-style:none}
.chips li{
  background:#fff;border:1px solid #cfe0d9;color:var(--teal-deep);
  padding:9px 14px;border-radius:999px;font-size:.92rem;font-weight:600;
}
.chips li.soon{background:#f6f4ef;border-color:#e6e0d4;color:#7a7466;font-weight:500}
.note{font-size:.92rem;color:var(--ink-soft);margin:0}

/* promise strip */
.promise{background:var(--teal-deep);color:#eaf6f1;padding:56px 0}
.promise h2{color:#fff}
.promise p{color:#c9e5db;max-width:62ch}
.promise .grid{margin-top:28px}
.promise .card{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.14);box-shadow:none}
.promise .card h3{color:#fff}
.promise .card p{color:#c9e5db}
.promise .card .ico{background:rgba(242,160,61,.18);color:var(--amber)}

/* cta block */
.cta{background:#fff;border:1px solid var(--line);border-radius:24px;padding:34px;box-shadow:var(--shadow);display:grid;gap:20px}
@media(min-width:820px){ .cta{grid-template-columns:1.2fr auto;align-items:center;padding:40px} }
.cta h2{margin:0 0 8px}
.cta p{margin:0;color:var(--ink-soft)}

/* faq */
details.faq{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:0;margin-bottom:10px;overflow:hidden;
}
details.faq summary{
  cursor:pointer;padding:18px 20px;font-weight:650;list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center;
}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{content:"+";font-size:1.4rem;color:var(--teal);line-height:1}
details.faq[open] summary::after{content:"–"}
details.faq .body{padding:0 20px 18px;color:var(--ink-soft);font-size:.97rem}
details.faq .body p{margin:0 0 10px}

/* footer */
footer{background:#0b241d;color:#b9d3ca;padding:48px 0 34px;font-size:.94rem}
footer a{color:#eaf6f1}
.foot-grid{display:grid;gap:28px}
@media(min-width:760px){ .foot-grid{grid-template-columns:1.4fr 1fr 1fr} }
.foot-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;margin-bottom:12px}
.foot-brand .mark{width:30px;height:30px}
footer h4{color:#fff;font-size:.82rem;text-transform:uppercase;letter-spacing:.08em;margin:0 0 12px}
footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.foot-legal{border-top:1px solid rgba(255,255,255,.12);margin-top:32px;padding-top:20px;color:#8fb2a7;font-size:.85rem;display:grid;gap:8px}
@media(min-width:760px){ .foot-legal{grid-template-columns:1fr auto;align-items:center} }

@media(prefers-reduced-motion:reduce){ *{transition:none!important;animation:none!important} }

/* ---- the contact form ------------------------------------------------ */
.field{margin:0 0 16px}
.field label{display:block;font-weight:650;font-size:.9rem;margin-bottom:6px;color:var(--ink)}
.field input,.field select,.field textarea{
  width:100%;box-sizing:border-box;padding:12px 14px;font:inherit;font-size:1rem;
  color:var(--ink);background:#fff;border:1.5px solid #cfe0d9;border-radius:11px}
.field textarea{min-height:140px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:2px solid var(--mint);outline-offset:1px;border-color:var(--mint)}
.field .hint{display:block;margin-top:5px;font-size:.8rem;color:var(--ink-soft)}
/* honeypot: a person never sees it, so anything typed here is a bot */
.hp{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}
.form-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px;
  box-shadow:0 10px 30px rgba(13,26,22,.06)}
.form-two{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}
@media(max-width:640px){.form-two{grid-template-columns:1fr}}

/* the proof-of-work control */
.pw-btn{display:inline-flex;align-items:center;gap:12px;padding:13px 18px;font:inherit;
  font-size:.98rem;font-weight:600;color:var(--ink);background:#fff;border:1.5px solid #cfe0d9;
  border-radius:11px;cursor:pointer}
.pw-btn:hover{border-color:var(--mint)}
.pw-btn[aria-busy="true"]{cursor:progress;color:var(--ink-soft)}
.pw-box{width:22px;height:22px;border:2px solid #9fb6ac;border-radius:6px;display:inline-flex;
  align-items:center;justify-content:center;font-size:14px;font-weight:800;color:#fff;flex:0 0 22px}
.pw-box-busy{border-color:var(--amber);background:var(--amber)}
.pw-box-ok{border-color:var(--mint);background:var(--mint)}
.pw-state{display:block;margin-top:8px;font-size:.82rem;color:var(--ink-soft);min-height:1.1em}