/* PaperTrail Folio — the product site (papertrailacademic.com/folio/).
   Its own look, separate from the PaperTrail teacher-tools pages.
   Colours are the Folio app's own tokens (ib-core app/globals.css). */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --brand:#2f6f6a; --brand-deep:#27605c; --brand-soft:#e6f1f0; --brand-line:#c9dfdc;
  --ink:#1c2430; --ink-2:#3a4656; --muted:#5f6a77;
  --line:#e3e8ee; --bg:#f4f6f8; --panel:#fff;
  --gold:#a5761c; --gold-soft:#f7efdc; --ok:#2e7d5b; --ok-soft:#e4f3ec;
  --radius:12px;
  --shadow:0 1px 2px rgba(20,30,45,.06),0 8px 28px rgba(20,30,45,.07);
  --serif:'Lora',Georgia,serif; --sans:'DM Sans',system-ui,-apple-system,'Segoe UI',sans-serif;
}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--sans);color:var(--ink);background:var(--panel);line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:var(--brand)}
img{display:block;max-width:100%}
.wrap{max-width:1120px;margin:0 auto;padding:0 28px}
@media (max-width:640px){.wrap{padding:0 16px}}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:8px 12px;border-radius:6px;z-index:999}
.skip:focus{left:8px}
:focus-visible{outline:3px solid #8cc3bd;outline-offset:2px;border-radius:4px}

/* ── header ── */
.hdr{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.hdr .wrap{display:flex;align-items:center;gap:22px;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);margin-right:auto;min-width:0}
.brand img{width:30px;height:30px;flex:none}
.brand b{font-family:var(--serif);font-size:18px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.brand b span{color:var(--brand)}
.brand small{display:block;font-size:11px;color:var(--muted);font-weight:500;line-height:1.1;white-space:nowrap}
.nav{display:flex;align-items:center;gap:22px}
.nav a{font-size:14px;font-weight:500;color:var(--ink-2);text-decoration:none}
.nav a:hover,.nav a[aria-current="page"]{color:var(--brand)}
.nav a[aria-current="page"]{font-weight:600}
.nav .btn{color:#fff}
.nav .btn.ghost{color:var(--brand)}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:8px;width:42px;height:38px;cursor:pointer;align-items:center;justify-content:center}
.menu-btn span,.menu-btn span::before,.menu-btn span::after{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative;transition:transform .2s}
.menu-btn span::before,.menu-btn span::after{content:"";position:absolute;left:0}
.menu-btn span::before{top:-6px}.menu-btn span::after{top:6px}
.hdr.open .menu-btn span{background:transparent}
.hdr.open .menu-btn span::before{transform:translateY(6px) rotate(45deg)}
.hdr.open .menu-btn span::after{transform:translateY(-6px) rotate(-45deg)}
@media (max-width:900px){
  .menu-btn{display:flex}
  .nav{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0;padding:8px 16px 18px;box-shadow:var(--shadow)}
  .hdr.open .nav{display:flex}
  .nav a{padding:12px 4px;border-bottom:1px solid var(--line);font-size:15px}
  .nav .btn{margin-top:12px;justify-content:center;border-bottom:none}
}

/* ── buttons ── */
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:8px;font:600 14.5px/1.2 var(--sans);text-decoration:none;cursor:pointer;border:1.5px solid var(--brand);background:var(--brand);color:#fff;transition:background .15s,transform .15s,box-shadow .15s;white-space:nowrap}
.btn:hover{background:var(--brand-deep);border-color:var(--brand-deep);transform:translateY(-1px);box-shadow:0 6px 18px rgba(47,111,106,.25)}
.btn.ghost{background:transparent;color:var(--brand)}
.btn.ghost:hover{background:var(--brand-soft);box-shadow:none}
.btn.sm{padding:8px 14px;font-size:13.5px}
.btn.light{background:#fff;color:var(--brand);border-color:#fff}
.btn.light:hover{background:var(--brand-soft);border-color:var(--brand-soft)}
.btn.outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn.outline-light:hover{background:rgba(255,255,255,.12);box-shadow:none}

/* ── type ── */
h1,h2,h3{font-family:var(--serif);color:var(--ink);letter-spacing:-.01em;line-height:1.18}
h1{font-size:clamp(32px,4.6vw,52px);font-weight:700}
h2{font-size:clamp(26px,3.2vw,36px);font-weight:700}
h3{font-size:20px;font-weight:600}
h1 em,h2 em{font-style:italic;color:var(--brand)}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--brand);margin-bottom:12px}
.lede{font-size:18px;color:var(--ink-2);max-width:640px}
.muted{color:var(--muted)}
.small{font-size:14px}

/* ── sections ── */
section{padding:84px 0}
@media (max-width:640px){section{padding:56px 0}}
.tint{background:var(--bg)}
.sec-head{max-width:720px;margin-bottom:40px}
.sec-head p{margin-top:12px;color:var(--ink-2);font-size:17px}

/* ── hero ── */
.hero{padding:72px 0 80px;background:linear-gradient(170deg,var(--brand-soft) 0%,#fff 62%);border-bottom:1px solid var(--line)}
.hero .wrap{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.hero h1{margin-bottom:20px}
.hero .lede{margin-bottom:30px}
.actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.hero .signin-line{margin-top:18px;font-size:14px;color:var(--muted)}
@media (max-width:900px){.hero .wrap{grid-template-columns:1fr;gap:40px}.hero{padding:48px 0 56px}}

/* ── the board illustration (invented names) ── */
.board{background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);overflow:hidden;font-size:13px}
.board-top{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 16px;border-bottom:1px solid var(--line);background:#fbfcfd}
.board-top b{font-size:13.5px}
.board-top .tag{font-size:11px;font-weight:700;color:var(--brand);background:var(--brand-soft);padding:3px 9px;border-radius:20px;white-space:nowrap}
.board table{width:100%;border-collapse:collapse}
.board th{font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);text-align:left;padding:10px 12px 6px}
.board th:not(:first-child){text-align:center}
.board th.nocaps{text-transform:none;letter-spacing:.02em}
.board td{padding:9px 12px;border-top:1px solid var(--line);white-space:nowrap}
.board td:not(:first-child){text-align:center}
.dots{display:inline-flex;gap:4px}
.d{width:10px;height:10px;border-radius:50%;border:1.5px solid #c3ccd6;display:inline-block}
.d.in{background:var(--brand-soft);border-color:var(--brand)}
.d.ok{background:var(--ok);border-color:var(--ok)}
.board-foot{display:flex;gap:16px;flex-wrap:wrap;padding:10px 16px;border-top:1px solid var(--line);background:#fbfcfd;font-size:11.5px;color:var(--muted)}
.board-foot span{display:inline-flex;align-items:center;gap:6px}
.board-cap{margin-top:10px;font-size:12.5px;color:var(--muted);text-align:center}
@media (max-width:420px){.board td,.board th{padding-left:8px;padding-right:8px}.board .hide-xs{display:none}}

/* ── cards ── */
.grid{display:grid;gap:20px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
@media (max-width:900px){.g3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.g3,.g2{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column}
.card h3{margin-bottom:8px}
.card p{color:var(--ink-2);font-size:15px}
.card .more{margin-top:auto;padding-top:16px;font-size:14px;font-weight:600;text-decoration:none}
.card .more:hover{text-decoration:underline}
.card .k{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--gold);margin-bottom:8px}

/* ── split lists ── */
.points{list-style:none;display:grid;gap:14px}
.points li{position:relative;padding-left:28px;color:var(--ink-2)}
.points li::before{content:"";position:absolute;left:0;top:.45em;width:14px;height:14px;border-radius:50%;background:var(--brand-soft);border:2px solid var(--brand)}
.points li b{color:var(--ink)}

/* roles */
.role{border-top:3px solid var(--brand)}

/* ── data band ── */
.databand .wrap{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
@media (max-width:900px){.databand .wrap{grid-template-columns:1fr;gap:28px}}

/* ── demo band ── */
.demo{background:var(--brand);color:#fff}
.demo .wrap{display:grid;grid-template-columns:1.3fr 1fr;gap:48px;align-items:center}
.demo h2{color:#fff}
.demo p{color:#d7ebe8;margin-top:12px;font-size:17px}
.demo .roles{display:grid;gap:10px}
.demo .roles div{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);border-radius:10px;padding:12px 16px;font-size:15px}
.demo .roles b{display:block;color:#fff}
.demo .roles span{color:#cfe4e1;font-size:14px}
.demo .fine{font-size:13.5px;color:#cfe4e1;margin-top:16px}
@media (max-width:900px){.demo .wrap{grid-template-columns:1fr;gap:28px}}

/* ── page head (inner pages) ── */
.page-head{padding:60px 0 44px;background:linear-gradient(170deg,var(--brand-soft) 0%,#fff 80%);border-bottom:1px solid var(--line)}
.page-head h1{font-size:clamp(30px,4vw,44px);margin-bottom:14px}
@media (max-width:640px){.page-head{padding:40px 0 32px}}

/* ── features page ── */
.toc{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}
.toc a{font-size:13.5px;font-weight:600;text-decoration:none;padding:7px 14px;border:1px solid var(--brand-line);border-radius:20px;background:#fff}
.toc a:hover{background:var(--brand-soft)}
.feature{display:grid;grid-template-columns:280px 1fr;gap:48px;padding:56px 0;border-top:1px solid var(--line);scroll-margin-top:80px}
.feature:first-child{border-top:none}
.feature h2{font-size:28px}
.feature .intro{margin-top:12px;color:var(--ink-2);font-size:15.5px}
.feature .cols{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.feature h3{font-family:var(--sans);font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.feature ul{list-style:none;display:grid;gap:9px}
.feature li{position:relative;padding-left:18px;font-size:15px;color:var(--ink-2)}
.feature li::before{content:"";position:absolute;left:0;top:.62em;width:7px;height:7px;border-radius:50%;background:var(--brand)}
@media (max-width:900px){.feature{grid-template-columns:1fr;gap:20px;padding:40px 0}.feature .cols{grid-template-columns:1fr}}

/* ── prose (security, privacy, terms) ── */
.prose{max-width:760px}
.prose h2{font-size:26px;margin:48px 0 12px;scroll-margin-top:80px}
.prose h2:first-child{margin-top:0}
.prose h3{font-family:var(--sans);font-size:17px;font-weight:700;margin:26px 0 8px}
.prose p,.prose li{color:var(--ink-2);font-size:16px}
.prose p+p{margin-top:12px}
.prose ul,.prose ol{margin:10px 0 0 22px;display:grid;gap:7px}
.prose strong{color:var(--ink)}
.prose .meta{font-size:14px;color:var(--muted);margin-bottom:28px}
.prose .note{background:var(--gold-soft);border-left:4px solid var(--gold);padding:14px 18px;border-radius:0 8px 8px 0;margin:18px 0;font-size:15px;color:var(--ink-2)}
.prose .callout{background:var(--brand-soft);border:1px solid var(--brand-line);padding:16px 20px;border-radius:10px;margin:18px 0}
.legal-layout{display:grid;grid-template-columns:220px 1fr;gap:56px;align-items:start}
.legal-layout>*{min-width:0}
.legal-toc{position:sticky;top:88px;font-size:14px}
.legal-toc b{display:block;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.legal-toc ol{list-style:none;display:grid;gap:7px}
.legal-toc a{text-decoration:none;color:var(--ink-2)}
.legal-toc a:hover{color:var(--brand)}
@media (max-width:900px){.legal-layout{grid-template-columns:1fr;gap:24px}.legal-toc{position:static;border:1px solid var(--line);border-radius:10px;padding:16px 18px}}
.tbl-scroll{overflow-x:auto;margin:16px 0;-webkit-overflow-scrolling:touch}
table.plain{width:100%;border-collapse:collapse;font-size:14.5px;min-width:560px}
table.plain th{text-align:left;font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);padding:10px 12px;border-bottom:2px solid var(--line)}
table.plain td{padding:12px;border-bottom:1px solid var(--line);vertical-align:top;color:var(--ink-2)}
table.plain td:first-child{font-weight:600;color:var(--ink)}

/* ── pricing / contact ── */
.panel{background:#fff;border:1px solid var(--line);border-radius:14px;padding:32px;box-shadow:var(--shadow)}
@media (max-width:640px){.panel{padding:22px}}
.form{display:grid;gap:16px}
.form label{display:block;font-size:14px;font-weight:600;margin-bottom:6px}
.form input,.form select,.form textarea{width:100%;font:inherit;font-size:15px;padding:11px 13px;border:1px solid #cdd5de;border-radius:8px;background:#fff;color:var(--ink)}
.form textarea{min-height:130px;resize:vertical}
.form .row2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:640px){.form .row2{grid-template-columns:1fr}}
.form .hint{font-size:13px;color:var(--muted);margin-top:6px}
.contact-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:36px;align-items:start}
@media (max-width:900px){.contact-grid{grid-template-columns:1fr}}
.ways{display:grid;gap:14px}
.way{border:1px solid var(--line);border-radius:12px;padding:18px 20px;background:#fff}
.way b{display:block;margin-bottom:4px}
.way p{font-size:14.5px;color:var(--ink-2)}

/* ── footer ── */
.ftr{background:#16202b;color:#c4ccd6;padding:56px 0 28px;font-size:14px}
.ftr a{color:#e3e8ee;text-decoration:none}
.ftr a:hover{text-decoration:underline}
.ftr-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
.ftr-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.ftr-brand img{width:28px;height:28px}
.ftr-brand b{font-family:var(--serif);font-size:17px;color:#fff}
.ftr h4{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:#8b97a5;margin-bottom:12px}
.ftr ul{list-style:none;display:grid;gap:8px}
.ftr-sister{margin-top:16px;padding:12px 14px;border:1px solid #2c3a4a;border-radius:10px;font-size:13.5px}
.ftr-bottom{margin-top:40px;padding-top:20px;border-top:1px solid #2c3a4a;display:grid;gap:8px;font-size:12.5px;color:#8b97a5}
@media (max-width:900px){.ftr-grid{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.ftr-grid{grid-template-columns:1fr}}

/* ── pricing ── */
.tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}
@media (max-width:900px){.tiers{grid-template-columns:1fr}}
.tier{background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px;display:flex;flex-direction:column;gap:6px}
.tier.feature-tier{border:2px solid var(--brand);box-shadow:var(--shadow)}
.tier .size{font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--brand)}
.tier .amt{font-family:var(--serif);font-size:40px;font-weight:700;color:var(--ink);line-height:1.1;margin-top:6px}
.tier .amt small{font-family:var(--sans);font-size:15px;font-weight:500;color:var(--muted)}
.tier .found{font-size:14px;color:var(--gold);font-weight:600}
.tier p{font-size:14.5px;color:var(--ink-2);margin-top:8px}
.tier .btn{margin-top:auto;align-self:flex-start}
.tier .spacer{flex:1;min-height:14px}
.founding{display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:center;background:var(--gold-soft);border:1px solid #ead9b0;border-radius:14px;padding:22px 26px;margin-top:28px}
.founding .badge{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;background:var(--gold);color:#fff;padding:6px 12px;border-radius:20px;white-space:nowrap}
.founding p{color:var(--ink-2);font-size:15.5px}
@media (max-width:640px){.founding{grid-template-columns:1fr;gap:10px}}
.incl{columns:2;column-gap:40px}
.incl li{break-inside:avoid;margin-bottom:10px}
@media (max-width:640px){.incl{columns:1}}

/* ── homepage: bigger buttons and the demo doors ── */
.btn.big{padding:14px 24px;font-size:15.5px}
.doors{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:var(--shadow);display:grid;gap:10px}
.doors-h{font-family:var(--serif);font-weight:700;font-size:19px;margin-bottom:4px}
.door{display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;padding:14px 16px;border:1.5px solid var(--line);border-radius:12px;text-decoration:none;color:var(--ink);transition:border-color .15s,background .15s,transform .15s}
.door:hover{border-color:var(--brand);background:var(--brand-soft);transform:translateY(-1px)}
.door-i{font-size:24px;width:44px;height:44px;border-radius:12px;background:var(--bg);display:grid;place-items:center}
.door b{display:block;font-size:16px}
.door small{display:block;font-size:13.5px;color:var(--muted);line-height:1.35;margin-top:2px}
.door-go{font-size:20px;color:var(--brand);font-weight:700}
.doors-fine{font-size:12.5px;color:var(--muted);margin-top:4px}
.sec-head p.eyebrow{margin-top:0;font-size:12px;color:var(--brand)}

/* Videos: the 40-second tour on the home page (vertical on phones), the 2-minute tour on Features */
.watch{padding:72px 0}
.watch .sec-head{margin-bottom:26px}
.vid{border-radius:14px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);background:#e8eef0}
.vid video{display:block;width:100%;height:auto}
.vid-tall{display:none;max-width:420px;margin:0 auto}
@media (max-width:700px){.vid-wide{display:none}.vid-tall{display:block}}
.watch-more{margin-top:16px;font-size:15px;color:var(--muted)}
.page-head .vid{margin-top:34px;max-width:960px}