:root{
    --paper:#fcfbf8; --ink:#16324c; --ink-soft:#3a5068; --muted:#5c6b7a;
    --accent:#e5745a; --accent-soft:#f4c9bd; --accent-ink:#b64f37;
    --grid:#e6e3db; --line:#e7e3da; --card:#ffffff; --shadow:rgba(22,50,76,.10);
    --board:#f3f1ec;
    --maxw:1120px;
    --serif:"Fraunces",Georgia,serif; --sans:"Figtree",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  }
  @media (prefers-color-scheme:dark){
    :root{
      --paper:#0d1f30; --ink:#eaf1f8; --ink-soft:#c2d0dd; --muted:#8ea0b1;
      --accent:#f0876d; --accent-soft:#3a2b28; --accent-ink:#f4a992;
      --grid:#183048; --line:#1d344b; --card:#122840; --shadow:rgba(0,0,0,.35);
      --board:#0f2537;
    }
  }
  :root[data-theme="light"]{
    --paper:#fcfbf8; --ink:#16324c; --ink-soft:#3a5068; --muted:#5c6b7a; --accent:#e5745a;
    --accent-soft:#f4c9bd; --accent-ink:#b64f37; --grid:#e6e3db; --line:#e7e3da; --card:#fff;
    --shadow:rgba(22,50,76,.10); --board:#f3f1ec;
  }
  :root[data-theme="dark"]{
    --paper:#0d1f30; --ink:#eaf1f8; --ink-soft:#c2d0dd; --muted:#8ea0b1; --accent:#f0876d;
    --accent-soft:#3a2b28; --accent-ink:#f4a992; --grid:#183048; --line:#1d344b; --card:#122840;
    --shadow:rgba(0,0,0,.35); --board:#0f2537;
  }

  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth}
  @media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
  body{
    font-family:var(--sans); color:var(--ink); background:var(--paper);
    line-height:1.6; -webkit-font-smoothing:antialiased;
    background-image:radial-gradient(var(--grid) 1.2px, transparent 1.2px);
    background-size:26px 26px; background-position:-13px -13px;
  }
  .wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
  a{color:inherit;text-decoration:none}
  h1,h2,h3{font-family:var(--serif);font-weight:500;line-height:1.08;text-wrap:balance;letter-spacing:-.01em;color:var(--ink)}
  .eyebrow{font-size:.78rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--accent-ink)}
  .lead{font-size:1.18rem;color:var(--ink-soft);max-width:56ch}
  :focus-visible{outline:2.5px solid var(--accent);outline-offset:3px;border-radius:6px}

  /* buttons */
  .btn{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--sans);font-weight:600;font-size:1rem;
    padding:.8rem 1.35rem;border-radius:11px;border:1.5px solid transparent;cursor:pointer;transition:transform .12s ease,box-shadow .12s ease,background .12s}
  .btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 20px -8px var(--accent)}
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px -8px var(--accent)}
  .btn-ghost{border-color:var(--line);color:var(--ink);background:transparent}
  .btn-ghost:hover{border-color:var(--ink-soft)}

  /* nav */
  header.nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(10px);
    background:color-mix(in srgb,var(--paper) 82%,transparent);border-bottom:1px solid var(--line)}
  .nav-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
  .brand{display:flex;align-items:center;gap:.6rem;font-family:var(--serif);font-weight:600;font-size:1.25rem}
  .brand .mark{width:30px;height:30px;flex:0 0 auto}
  .nav-links{display:flex;align-items:center;gap:1.6rem}
  .nav-links a{font-weight:500;color:var(--ink-soft);font-size:.95rem}
  .nav-links a:hover{color:var(--ink)}
  .nav-cta{padding:.55rem 1rem;font-size:.92rem}
  .themebtn{background:none;border:1px solid var(--line);border-radius:9px;width:38px;height:38px;cursor:pointer;color:var(--ink);display:grid;place-items:center}
  .navtoggle{display:none;background:none;border:1px solid var(--line);border-radius:9px;width:40px;height:40px;font-size:1.2rem;cursor:pointer;color:var(--ink)}
  @media(max-width:820px){
    .navtoggle{display:grid;place-items:center}
    .nav-links{position:absolute;top:66px;left:0;right:0;flex-direction:column;align-items:stretch;gap:.5rem;
      padding:16px 24px 22px;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:0 20px 40px -24px var(--shadow);
      display:none}
    .nav-links.open{display:flex}
    .nav-links a{padding:.5rem 0;font-size:1.05rem}
    .nav-links .themebtn{width:100%;height:auto;padding:.5rem}
    .nav-links .nav-cta{justify-content:center;margin-top:.4rem}
  }

  /* hero */
  .hero{padding:76px 0 40px}
  .hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
  .hero h1{font-size:clamp(2.5rem,5.4vw,4rem)}
  .hero h1 .hl{position:relative;white-space:nowrap;color:var(--accent-ink)}
  .hero h1 .hl svg{position:absolute;left:0;right:0;bottom:-.18em;width:100%;height:.34em;color:var(--accent)}
  .hero p.lead{margin-top:1.3rem}
  .hero .cta-row{display:flex;gap:.8rem;margin-top:2rem;flex-wrap:wrap}
  .hero .fine{margin-top:1rem;font-size:.9rem;color:var(--muted)}
  @media(max-width:900px){.hero-grid{grid-template-columns:1fr;gap:36px}}

  /* board mock */
  .board{background:var(--board);border:1px solid var(--line);border-radius:18px;padding:14px;
    box-shadow:0 30px 60px -30px var(--shadow);position:relative}
  .board-bar{display:flex;align-items:center;gap:6px;padding:2px 4px 12px}
  .dot{width:11px;height:11px;border-radius:50%}
  .board-canvas{position:relative;background:var(--card);border-radius:12px;height:330px;overflow:hidden;
    background-image:radial-gradient(var(--grid) 1px,transparent 1px);background-size:22px 22px}
  .board-canvas svg.draw{position:absolute;inset:0;width:100%;height:100%}
  .vidbar{position:absolute;top:12px;right:12px;display:flex;gap:6px;padding:5px;border-radius:11px;
    background:rgba(20,22,28,.92);box-shadow:0 8px 18px -6px rgba(0,0,0,.45)}
  .vtile{position:relative;width:82px;height:56px;border-radius:8px;overflow:hidden;display:grid;place-items:center;
    background:linear-gradient(135deg,#20415f,#2f5e82);color:#cfe0ee;font-size:1.5rem}
  .vtile.stu{background:linear-gradient(135deg,#2f5e82,#3a7a67)}
  .vtile .tag{position:absolute;left:4px;bottom:3px;font-size:.56rem;color:#fff;background:rgba(0,0,0,.45);padding:1px 5px;border-radius:4px}
  .calc{position:absolute;left:16px;bottom:16px;width:132px;background:#22303c;border-radius:11px;padding:9px;box-shadow:0 10px 22px -8px rgba(0,0,0,.5)}
  .calc .scr{background:#b9c4b0;border-radius:5px;height:30px;margin-bottom:7px;display:flex;align-items:center;justify-content:flex-end;padding:0 8px;color:#20261a;font-family:var(--serif);font-weight:600}
  .calc .keys{display:grid;grid-template-columns:repeat(4,1fr);gap:4px}
  .calc .keys span{background:#39454f;border-radius:4px;height:16px}
  .calc .keys span.op{background:#e5745a}
  .note{position:absolute;font-family:var(--serif);color:var(--ink)}

  /* logos / trust strip */
  .strip{padding:14px 0 30px}
  .strip .row{display:flex;flex-wrap:wrap;gap:12px 26px;align-items:center;justify-content:center;color:var(--muted);font-size:.92rem;font-weight:500}
  .strip .row b{color:var(--ink)}
  .pill{display:inline-flex;align-items:center;gap:.45rem;border:1px solid var(--line);border-radius:999px;padding:.4rem .85rem;background:var(--card)}

  /* sections */
  section{padding:66px 0}
  .sec-head{max-width:60ch}
  .sec-head h2{font-size:clamp(1.9rem,3.6vw,2.8rem);margin-top:.5rem}
  .sec-head p{margin-top:.9rem;font-size:1.08rem;color:var(--ink-soft)}

  /* features */
  .feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:40px}
  @media(max-width:860px){.feat-grid{grid-template-columns:1fr 1fr}}
  @media(max-width:560px){.feat-grid{grid-template-columns:1fr}}
  .card{background:var(--card);border:1px solid var(--line);border-radius:15px;padding:24px;transition:transform .15s ease,box-shadow .15s ease}
  .card:hover{transform:translateY(-3px);box-shadow:0 18px 34px -22px var(--shadow)}
  .card .ic{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent-ink);margin-bottom:14px}
  .card h3{font-size:1.22rem;font-weight:600}
  .card p{margin-top:.5rem;color:var(--muted);font-size:.97rem}

  /* steps */
  .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:44px;counter-reset:step}
  @media(max-width:760px){.steps{grid-template-columns:1fr}}
  .step{position:relative;padding-top:14px}
  .step .n{font-family:var(--serif);font-size:2.4rem;color:var(--accent);line-height:1}
  .step h3{font-size:1.3rem;font-weight:600;margin:.5rem 0 .4rem}
  .step p{color:var(--muted)}
  .step::before{content:"";position:absolute;top:0;left:0;width:46px;height:3px;background:var(--accent-soft);border-radius:2px}

  /* split feature (calculators) */
  .split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
  @media(max-width:820px){.split{grid-template-columns:1fr;gap:32px}}
  .chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
  .chip{border:1px solid var(--line);background:var(--card);border-radius:9px;padding:.45rem .8rem;font-weight:500;font-size:.9rem;color:var(--ink-soft)}
  .calc-faces{display:flex;gap:14px;justify-content:center}
  .cface{background:#22303c;border-radius:14px;padding:12px;width:33%;box-shadow:0 16px 30px -18px var(--shadow)}
  .cface .scr{background:#b9c4b0;border-radius:6px;height:36px;margin-bottom:9px}
  .cface .k{display:grid;grid-template-columns:repeat(4,1fr);gap:4px}
  .cface .k span{background:#39454f;border-radius:4px;height:13px}
  .cface .k span.a{background:#e5745a}
  .cface .lbl{color:#cfe0ee;font-size:.68rem;text-align:center;margin-top:8px;font-weight:600}

  /* privacy band, light, warm panel so it reads easily */
  .band{background:color-mix(in srgb,var(--accent-soft) 24%,var(--card));color:var(--ink);
    border:1px solid color-mix(in srgb,var(--accent) 22%,var(--line));border-radius:22px;padding:52px;
    box-shadow:0 24px 50px -34px var(--shadow);position:relative;overflow:hidden}
  .band > p{color:var(--ink-soft);margin-top:1rem;max-width:58ch}
  .band .cols{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:34px}
  @media(max-width:760px){.band{padding:32px}.band .cols{grid-template-columns:1fr}}
  .band .cols h3{color:var(--ink);font-size:1.1rem;font-weight:600;display:flex;align-items:flex-start;gap:.5rem}
  .band .cols p{color:var(--muted);font-size:.95rem;margin-top:.4rem}
  .band .cols .tick{color:var(--accent);font-weight:700}

  /* pricing */
  .price-wrap{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:40px;max-width:980px;align-items:start}
  @media(max-width:860px){.price-wrap{grid-template-columns:1fr;max-width:440px;margin-left:auto;margin-right:auto}}
  .price .note-line{font-size:.9rem;color:var(--muted);margin:-.2rem 0 .8rem}
  .price{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:28px}
  .price.feature{border-color:var(--accent);box-shadow:0 24px 50px -30px var(--accent)}
  .price .tier{font-weight:600;color:var(--accent-ink)}
  .price .amt{font-family:var(--serif);font-size:2.6rem;margin:.3rem 0}
  .price .amt small{font-family:var(--sans);font-size:.95rem;color:var(--muted);font-weight:500}
  .price ul{list-style:none;margin:16px 0 22px;display:flex;flex-direction:column;gap:.6rem}
  .price li{display:flex;gap:.6rem;color:var(--ink-soft);font-size:.97rem}
  .price li svg{color:var(--accent);flex:0 0 auto;margin-top:3px}

  /* faq */
  .faq{max-width:760px;margin-top:34px;display:flex;flex-direction:column;gap:2px}
  details{border-bottom:1px solid var(--line);padding:6px 0}
  summary{cursor:pointer;list-style:none;padding:16px 4px;font-weight:600;font-size:1.05rem;display:flex;justify-content:space-between;align-items:center;gap:1rem}
  summary::-webkit-details-marker{display:none}
  summary .plus{color:var(--accent);font-size:1.4rem;transition:transform .2s}
  details[open] summary .plus{transform:rotate(45deg)}
  details p{padding:0 4px 18px;color:var(--muted);max-width:64ch}

  /* final cta */
  .final{text-align:center;padding:80px 0}
  .final h2{font-size:clamp(2rem,4.4vw,3.2rem)}
  .final p{margin:1rem auto 2rem;max-width:52ch;color:var(--ink-soft);font-size:1.1rem}

  /* footer */
  footer{border-top:1px solid var(--line);padding:44px 0 60px;color:var(--muted)}
  .foot{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
  .foot a{color:var(--ink-soft);font-size:.95rem}
  .foot a:hover{color:var(--accent-ink)}
  .foot .cols{display:flex;gap:52px;flex-wrap:wrap}
  .foot .col{display:flex;flex-direction:column;gap:.6rem}
  .foot .col b{color:var(--ink);font-size:.82rem;letter-spacing:.08em;text-transform:uppercase;margin-bottom:.3rem}
  .reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
  .reveal.in{opacity:1;transform:none}

/* Screenshots section. `aspect-ratio` on the image keeps its box before the file
   arrives, which is the other half of the width/height attributes. */
#see-it { padding: 2.5rem 0 1rem; }
.shots { display: grid; gap: 1.6rem; grid-template-columns: 1fr; margin-top: 1.4rem; }
@media (min-width: 900px) { .shots { grid-template-columns: 1fr 1fr; } }
.shots figure { margin: 0; }
.shots img {
  width: 100%; height: auto; aspect-ratio: 8 / 5; display: block;
  border-radius: 14px; border: 1px solid rgba(22,50,76,.12);
  box-shadow: 0 18px 40px rgba(22,50,76,.13);
  background: #f3f4f7;
}
.shots figcaption { margin-top: .7rem; font-size: .92rem; color: var(--muted); }

/* Who pays what. The tutor plans are a price grid; these two are not plans a tutor
   picks, so they read as prose in a card rather than as a fourth column competing
   with them. */
.app-note { max-width:620px; margin:.6rem auto 0; font-size:.92rem; color:var(--muted); }
.price .or-line { margin:.55rem 0 0; text-align:center; font-size:.84rem; color:var(--muted); }
.who { display:grid; gap:18px; grid-template-columns:1fr; max-width:980px; margin:34px auto 0; }
@media (min-width:860px) { .who { grid-template-columns:1fr 1fr; } }
.who-card { background:var(--card); border:1px solid var(--line); border-radius:16px; padding:22px 24px; }
.who-head { display:flex; align-items:baseline; gap:.6rem; margin-bottom:.5rem; }
.who-amt { font-family:var(--serif); font-size:1.7rem; }
.who-amt small { font-family:var(--sans); font-size:.85rem; color:var(--muted); font-weight:500; }
.who-tier { font-weight:600; color:var(--accent-ink); }
.who-card p { font-size:.94rem; color:var(--muted); margin:0; }
.who-fine { margin-top:.55rem !important; font-size:.86rem !important; opacity:.85; }

/* Download, offered where people are already looking rather than only at the end. */
.dl-row { display:flex; flex-wrap:wrap; gap:.7rem; justify-content:center; }
.dl-early { margin:.5rem 0 0; font-size:.9rem; color:var(--muted); }
.dl-early a { font-weight:600; border-bottom:1px solid currentColor; }

.btn-dl { display:inline-flex; align-items:center; gap:.5rem; }
.btn-dl svg { flex:none; }
@media (max-width:560px) { .cta-row { flex-wrap:wrap; } .cta-row .btn { flex:1 1 100%; justify-content:center; } }

/* ---- Sub-pages (features, pricing, compare, guides, /for/*) ------------------
   The homepage is a landing page and owns its own layout. These are pages people
   READ, so they get a narrower measure, real heading rhythm and tables that can
   be scrolled sideways on a phone rather than squashing the page. */
.page{padding:4rem 0 3rem}
.page .wrap{max-width:860px}
.page.wide .wrap{max-width:var(--maxw)}
.page h1{font-family:var(--serif);font-size:clamp(2rem,5vw,3rem);line-height:1.08;margin:0 0 .6rem;text-wrap:balance}
.page .standfirst{font-size:1.15rem;color:var(--ink-soft);max-width:60ch;margin:0 0 2rem}
.page h2{font-family:var(--serif);font-size:clamp(1.4rem,3vw,1.9rem);margin:2.6rem 0 .6rem;text-wrap:balance}
.page h3{font-size:1.08rem;margin:1.6rem 0 .3rem}
.page p,.page li{color:var(--ink-soft);line-height:1.65}
.page p{margin:0 0 1rem;max-width:68ch}
.page ul{margin:0 0 1.2rem;padding-left:1.1rem;max-width:68ch}
.page li{margin:.35rem 0}
.page .lede{font-weight:600;color:var(--ink)}
.tablewrap{overflow-x:auto;margin:1.2rem 0 2rem;border:1px solid var(--line);border-radius:12px}
table.cmp{border-collapse:collapse;width:100%;min-width:560px;background:var(--card);font-size:.95rem}
table.cmp th,table.cmp td{padding:.7rem .9rem;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
table.cmp th{font-weight:700;color:var(--ink);background:color-mix(in srgb,var(--accent-soft) 18%,var(--card))}
table.cmp td:first-child{font-weight:600;color:var(--ink)}
table.cmp tr:last-child td{border-bottom:0}
/* `callout`, NOT `note`: the homepage already uses .note for the handwritten
   label on the board illustration, and that one is position:absolute. Reusing
   the name inherited the positioning and laid this over the next heading. */
.callout{display:block;position:static;border-left:3px solid var(--accent);padding:.15rem 0 .15rem 1rem;margin:1.4rem 0;color:var(--muted);max-width:68ch}
.callout p{margin:0;color:inherit}
.cards3{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));margin:1.4rem 0 2rem}
.cards3 .c{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:1.1rem}
.cards3 .c b{display:block;color:var(--ink);margin-bottom:.3rem}
.cards3 .c p{font-size:.95rem;margin:0}
.crumb{font-size:.88rem;color:var(--muted);margin:0 0 1rem}
.crumb a{color:var(--muted)}
.cta-row{display:flex;gap:.7rem;flex-wrap:wrap;margin:2rem 0 0}

/* The Teams strip on the homepage pricing section. Deliberately not a fourth price
   card: a team buyer wants the per-tutor argument and a way through to the page
   that makes it, not another column to read across. */
.teams-strip{max-width:860px;margin:30px auto 0;display:flex;gap:1.4rem;align-items:center;
  justify-content:space-between;flex-wrap:wrap;background:var(--card);border:1px solid var(--line);
  border-radius:16px;padding:1.15rem 1.35rem}
.teams-strip>div>b{color:var(--ink);display:block;margin-bottom:.25rem}
/* Bold INSIDE the paragraph stays inline; the block rule above is only for the
   strip's own title, and without this scoping it broke the sentence in three. */
.teams-strip p b{display:inline;color:var(--ink)}
.teams-strip p{margin:0;max-width:52ch;font-size:.95rem;color:var(--ink-soft);line-height:1.6}
.teams-cta{display:flex;gap:.6rem;flex-wrap:wrap}
@media (max-width:640px){.teams-strip{flex-direction:column;align-items:flex-start}}