/* Carry the One Math: the public site. Warm paper, deep navy bands, a serif for headlines. */
:root {
  --paper:#F6F3EC; --sand:#ECE5D8; --ink:#1B1A18; --mute:#5f5b55; --line:rgba(27,26,24,.12);
  --navy:#1C2B4A; --navy-deep:#16223B; --brick:#C8412B; --brick-dark:#A9361F; --cream:#F6F3EC;
  --serif:"Cormorant Garamond", Georgia, serif; --sans:Inter, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
}
* { box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { margin:0; background:var(--paper); color:var(--ink); font:17px/1.6 var(--sans); -webkit-font-smoothing:antialiased; }
img, video { max-width:100%; }
a { color:var(--navy); }
.wrap { max-width:1120px; margin:0 auto; padding:0 28px; }
.narrow { max-width:760px; }
h1, h2, h3 { font-family:var(--serif); font-weight:500; line-height:1.08; letter-spacing:-.01em; margin:0; color:var(--navy); }
h1 { font-size:64px; } h2 { font-size:46px; } h3 { font-size:26px; line-height:1.2; }
p { margin:0 0 16px; }
.kick { font:600 12px/1 var(--sans); letter-spacing:.16em; text-transform:uppercase; color:var(--brick); margin:0 0 16px; }
.lede { font-size:20px; color:var(--mute); max-width:58ch; }
section { padding:96px 0; }
.band-sand { background:var(--sand); }
.band-deep { background:var(--navy-deep); color:var(--cream); }
.band-deep h2, .band-deep h3 { color:var(--cream); }
.band-deep .lede, .band-deep p { color:rgba(246,243,236,.86); }
.band-deep .kick { color:#F2A08F; }

/* header */
.top { position:sticky; top:0; z-index:20; background:var(--paper); border-bottom:1px solid var(--line); }   /* solid, so the logo's white edge never shows */
.top .wrap { display:flex; align-items:center; justify-content:space-between; height:74px; }
.logo img { height:46px; width:auto; display:block; mix-blend-mode:multiply; }
.nav { display:flex; align-items:center; gap:30px; }
.nav a { color:var(--ink); text-decoration:none; font-size:14.5px; }
.nav a:hover, .nav a.on { color:var(--brick); }
.nav a.btn, .nav a.btn:hover { color:#fff; }
.menu { display:none; background:none; border:0; font-size:15px; color:var(--ink); cursor:pointer; padding:8px; }

/* buttons */
.btn { display:inline-block; background:var(--brick); color:#fff; font:600 15px/1 var(--sans); padding:15px 24px; border-radius:6px; text-decoration:none; border:0; cursor:pointer; letter-spacing:.01em; }
.btn:hover { background:var(--brick-dark); }
.btn.ghost { background:transparent; color:var(--cream); border:1px solid rgba(246,243,236,.6); }
.btn.ghost:hover { background:rgba(246,243,236,.1); }
.btn.quiet { background:transparent; color:var(--navy); border:1px solid var(--navy); }
.btn.small { padding:11px 18px; font-size:14px; }
.cta-row { display:flex; gap:12px; flex-wrap:wrap; align-items:center; }

/* hero with looping clips */
.hero { position:relative; min-height:88vh; display:flex; align-items:flex-end; overflow:hidden; padding:0; background:var(--navy-deep); }
.hero-bg { position:absolute; inset:0; }
.hero-bg video { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; opacity:0; transition:opacity 1.6s ease; }
.hero-bg video.on { opacity:1; }
.hero-veil { position:absolute; inset:0; background:linear-gradient(180deg, rgba(14,20,34,.30), rgba(14,20,34,.10) 35%, rgba(14,20,34,.78)); }
.hero-inner { position:relative; z-index:2; width:100%; padding-bottom:9vh; }
.hero .kick { color:rgba(246,243,236,.85); }
.hero h1 { color:var(--cream); max-width:15ch; text-shadow:0 2px 30px rgba(0,0,0,.4); }
.hero .sub { color:rgba(246,243,236,.94); font-size:19px; max-width:52ch; margin:22px 0 30px; text-shadow:0 1px 14px rgba(0,0,0,.4); }
.hero .note { color:rgba(246,243,236,.8); font-size:13.5px; margin-top:14px; }

/* page header for inner pages */
.pagehead { padding:84px 0 40px; }
.pagehead h1 { font-size:58px; max-width:18ch; }
.pagehead .lede { margin-top:20px; }

/* numbered steps */
.steps { display:grid; grid-template-columns:repeat(4, 1fr); gap:34px; margin-top:52px; }
.step .num { font:500 15px/1 var(--sans); color:var(--brick); letter-spacing:.08em; border-top:1px solid currentColor; padding-top:14px; margin-bottom:16px; display:block; }
.band-deep .step .num { color:#F2A08F; }
.step h3 { margin-bottom:10px; }
.step p { font-size:15.5px; color:var(--mute); }
.band-deep .step p { color:rgba(246,243,236,.8); }

/* two columns */
.split { display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:center; }
.split video, .split img { width:100%; border-radius:4px; display:block; }

/* list of short points */
.points { display:grid; grid-template-columns:repeat(3, 1fr); gap:36px; margin-top:48px; }
.points h3 { font-size:24px; margin-bottom:10px; }
.points p { font-size:15.5px; color:var(--mute); }
.band-deep .points p { color:rgba(246,243,236,.82); }

/* comparison chart */
.compare { width:100%; border-collapse:collapse; margin-top:40px; font-size:15.5px; background:#fff; }
.compare th, .compare td { padding:16px 18px; border-bottom:1px solid var(--line); text-align:left; vertical-align:top; }
.compare thead th { font:600 13px/1.3 var(--sans); letter-spacing:.06em; text-transform:uppercase; color:var(--mute); background:var(--paper); }
.compare thead th.us { color:#fff; background:var(--navy); }
.compare td.us { background:rgba(28,43,74,.05); font-weight:600; color:var(--navy); }
.compare tbody th { font-weight:500; width:30%; }
.yes::before { content:"\2713  "; color:var(--brick); font-weight:700; }
.no { color:var(--mute); }
.part { color:var(--mute); }
.tablewrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }
.tablewrap .compare { min-width:720px; }

/* research */
.research { list-style:none; padding:0; margin:44px 0 0; display:grid; grid-template-columns:1fr 1fr; gap:34px 48px; }
.research li h3 { font-size:24px; margin-bottom:8px; }
.research li p { font-size:15.5px; color:var(--mute); margin-bottom:8px; }
.cite { font-size:13px; color:var(--mute); }
.cite a { color:var(--mute); }
.band-deep .research li p, .band-deep .cite, .band-deep .cite a { color:rgba(246,243,236,.78); }

/* price */
.price { display:grid; grid-template-columns:1fr 1fr; gap:24px; margin-top:40px; }
.price .card { background:#fff; border:1px solid var(--line); padding:30px; border-radius:4px; }
.price .amt { font:500 52px/1 var(--serif); color:var(--navy); }
.price .per { color:var(--mute); font-size:15px; }

/* story */
.story p { font-size:19px; line-height:1.75; }
.story p.big { font-family:var(--serif); font-size:30px; line-height:1.35; color:var(--navy); }

/* questions */
.qa details { border-bottom:1px solid var(--line); padding:22px 0; }
.qa summary { font:500 24px/1.3 var(--serif); color:var(--navy); cursor:pointer; list-style:none; position:relative; padding-right:36px; }
.qa summary::-webkit-details-marker { display:none; }
.qa summary::after { content:"+"; position:absolute; right:4px; top:-2px; font:300 28px/1 var(--sans); color:var(--brick); }
.qa details[open] summary::after { content:"\2013"; }
.qa details p { margin:14px 0 0; color:var(--mute); max-width:64ch; }

/* forms */
.form { display:grid; gap:16px; max-width:460px; }
.form.row { grid-template-columns:1.3fr 1fr .8fr 1.2fr auto; max-width:none; align-items:end; }
.form label { display:block; font-size:13px; font-weight:600; letter-spacing:.04em; text-transform:uppercase; color:var(--mute); margin-bottom:6px; }
.band-deep .form label { color:rgba(246,243,236,.75); }
.form input, .form select, .form textarea { width:100%; font:16px/1.4 var(--sans); padding:13px 14px; border:1px solid rgba(27,26,24,.25); border-radius:6px; background:#fff; color:var(--ink); }
.form textarea { min-height:150px; resize:vertical; }
.form .err { color:var(--brick); font-size:14px; }
@media (min-width:901px) {      /* desktop: slimmer fields, the button the same height, one-line labels in the row */
  .form input, .form select { height:42px; padding:0 12px; }
  .form.row { grid-template-columns:1.2fr 1fr 1.15fr 1.15fr auto; }
  .form.row label { white-space:nowrap; }
  .form.row .btn { height:42px; padding:0 20px; }
}
.formnote { font-size:13.5px; color:var(--mute); margin-top:12px; }
.band-deep .formnote { color:rgba(246,243,236,.7); }
.thanks { background:#fff; border-left:3px solid var(--brick); padding:18px 20px; margin-top:20px; }

/* footer */
footer { background:var(--navy-deep); color:rgba(246,243,236,.7); padding:56px 0 40px; font-size:14px; }
footer .wrap { display:flex; justify-content:space-between; gap:30px; flex-wrap:wrap; }
footer a { color:rgba(246,243,236,.85); text-decoration:none; margin-right:22px; }
footer .fine { margin-top:28px; width:100%; font-size:12.5px; color:rgba(246,243,236,.5); }

.js .reveal.below { opacity:0; transform:translateY(14px); transition:opacity .8s ease, transform .8s ease; }
.js .reveal.below.in { opacity:1; transform:none; }

/* sample pages */
.samples { display:grid; grid-template-columns:repeat(4, 1fr); gap:28px 22px; margin-top:48px; }
.samples figure { margin:0; }
.samples img { display:block; width:100%; height:auto; background:#fff; border:1px solid var(--line); border-radius:3px; box-shadow:0 10px 24px -14px rgba(27,26,24,.35); transition:transform .2s; }
.samples a:hover img { transform:translateY(-3px); }
.samples figcaption { font-size:14.5px; color:var(--mute); margin-top:12px; line-height:1.45; }
.samples figcaption b { display:block; color:var(--navy); font-weight:600; margin-bottom:2px; }
@media (max-width:900px) { .samples { grid-template-columns:repeat(2, 1fr); gap:24px 16px; } }

@media (max-width:900px) {
  h1, .pagehead h1 { font-size:42px; } h2 { font-size:34px; }
  section { padding:68px 0; }
  .steps, .points, .research, .split, .price { grid-template-columns:1fr; gap:30px; }
  .form.row { grid-template-columns:1fr; }
  .nav { display:none; position:absolute; top:74px; left:0; right:0; flex-direction:column; align-items:flex-start; gap:18px; background:var(--paper); padding:22px 28px; border-bottom:1px solid var(--line); }
  .nav.open { display:flex; }
  .menu { display:block; }
  .hero { min-height:82vh; }
  .wrap { padding:0 20px; }
}
@media (prefers-reduced-motion: reduce) { .reveal { opacity:1; transform:none; transition:none; } .hero-bg video { transition:none; } }

/* K-5 skills map on the program page */
.mapstats { display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin:40px 0 28px; }
.mapstats div { border-top:1px solid var(--brick); padding-top:14px; }
.mapstats b { display:block; font:500 44px/1 var(--serif); color:var(--navy); }
.mapstats span { font-size:14.5px; color:var(--mute); }
.skillmap { position:relative; }
.smap { border-collapse:collapse; width:100%; min-width:980px; background:#fff; font-size:13.5px; }
.smap th, .smap td { border:1px solid var(--line); padding:10px; text-align:left; vertical-align:top; }
.smap thead th { font:600 12px/1.3 var(--sans); letter-spacing:.08em; text-transform:uppercase; color:#fff; background:var(--navy); }
.smap th.topic { width:130px; font:500 16px/1.25 var(--serif); color:var(--navy); background:var(--sand); position:sticky; left:0; z-index:1; }
.smap .sk { display:block; padding:5px 8px; margin:0 0 6px; border-radius:5px; background:var(--paper); line-height:1.3; color:var(--ink); }
.smap .sk:last-child { margin-bottom:0; }
.mapfade { display:none; }
.js .skillmap.closed .tablewrap { max-height:520px; overflow-x:auto; overflow-y:hidden; }
.js .skillmap.closed .mapfade { display:block; position:absolute; left:0; right:0; bottom:0; height:140px; background:linear-gradient(rgba(255,255,255,0), var(--paper)); pointer-events:none; }
.maptoggle-row { margin:20px 0 10px; }
html:not(.js) .maptoggle-row { display:none; }
@media (max-width:700px) { .mapstats { grid-template-columns:repeat(2,1fr); } .mapstats b { font-size:36px; } .smap th.topic { width:96px; font-size:14px; } }

/* hero tagline: the long line on wide screens, the short one on phones */
.kick-short { display:none; }

/* phones: smaller hero text, lower on the screen, so the video shows above it */
@media (max-width:700px) {
  .kick-long { display:none; } .kick-short { display:inline; }
  .hero { min-height:calc(100svh - 74px); }
  .hero-veil { background:linear-gradient(180deg, rgba(14,20,34,.10) 0%, rgba(14,20,34,.05) 34%, rgba(14,20,34,.82) 60%, rgba(14,20,34,.9)); }
  .hero-inner { padding-bottom:26px; }
  .hero .kick { margin-bottom:10px; }
  .hero h1 { font-size:34px; max-width:none; }
  .hero .sub { font-size:15px; line-height:1.5; margin:12px 0 18px; }
  .hero .cta-row { gap:10px; }
  .hero .cta-row .btn { padding:13px 18px; font-size:14.5px; }
  .hero .note { display:none; }
}

/* wide tables on small screens: a fade and an arrow say there's more to the right */
.scrollbox { position:relative; }
.scrollhint { display:none; position:absolute; top:10px; right:10px; z-index:3; width:38px; height:38px; border-radius:50%;
  border:0; background:var(--brick); color:#fff; font:600 20px/38px var(--sans); text-align:center; cursor:pointer;
  box-shadow:0 2px 10px rgba(0,0,0,.25); animation:nudge 1.6s ease-in-out infinite; }
.scrollfade { display:none; position:absolute; top:0; right:0; bottom:0; width:48px; z-index:2; pointer-events:none;
  background:linear-gradient(90deg, rgba(246,243,236,0), rgba(246,243,236,.95)); }
.scrollbox.more .scrollhint, .scrollbox.more .scrollfade { display:block; }
@keyframes nudge { 0%,100% { transform:translateX(0); } 50% { transform:translateX(4px); } }
@media (prefers-reduced-motion: reduce) { .scrollhint { animation:none; } }

/* privacy and terms */
.legal h2 { font-size:30px; margin:44px 0 14px; }
.legal p, .legal li { font-size:16.5px; color:var(--ink); max-width:68ch; }
.legal ul { padding-left:22px; margin:0 0 14px; } .legal li { margin:0 0 8px; }
.band-deep .formnote.agree a { color:var(--cream); }
@media (max-width:900px) { .legal h2 { font-size:26px; } }
/* the compare table's top gap moves to its scroll box, so the arrow sits on the table's header row */
.scrollbox:has(.compare) { margin-top:40px; }
.scrollbox .compare { margin-top:0; }

/* footer links: a wrapped row on wide screens, a two-column list on phones */
footer .flinks { display:flex; flex-wrap:wrap; gap:10px 22px; }
footer .flinks a { margin-right:0; white-space:nowrap; }
@media (max-width:700px) {
  footer { padding:44px 0 32px; }
  footer .wrap { flex-direction:column; gap:22px; }
  footer .flinks { display:grid; grid-template-columns:1fr 1fr; gap:4px 20px; width:100%; }
  footer .flinks a { display:block; padding:9px 0; font-size:15px; }
  footer .ftag { font-size:13.5px; line-height:1.5; }
  footer .fine { margin-top:0; }
}
/* the underlined word in "and why" */
.u { text-decoration:underline; text-decoration-color:var(--brick); text-decoration-thickness:2px; text-underline-offset:.27em; text-decoration-skip-ink:none; }   /* below the y's tail, one unbroken line */