/* ===========================================================
   Chess Classrooms — public site
   The scoresheet: numbered moves, two columns, walnut and paper.
   =========================================================== */
@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,600;9..144,800&family=Karla:wght@400;500;700&family=JetBrains+Mono:wght@400;700&display=swap');

:root{
  /* Taken from the logo: the deep navy of the king, the blue of the mortarboard. */
  --navy:#01101E;         /* the field */
  --navy-2:#0A1C2E;
  --navy-3:#14293D;
  --blue:#07437D;         /* the wordmark blue */
  --blue-hi:#2C7BC9;      /* lifted, for links on dark */
  --paper:#F4F6F9;        /* cool off-white, not cream */
  --paper-dim:#A9BACB;
  --board-l:#F0D9B5;      /* the board keeps its own colours */
  --board-d:#B58863;
  --gold:#C9A227;
  --rule:rgba(244,246,249,.14);
  --measure:66ch;
}

*{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{
  background:var(--navy);color:var(--paper);
  font-family:'Karla',system-ui,sans-serif;font-size:17px;line-height:1.65;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:var(--blue-hi);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--blue-hi);outline-offset:3px;border-radius:3px}
img{max-width:100%;display:block}

.wrap{width:min(1140px,92vw);margin:0 auto}
.narrow{width:min(760px,92vw);margin:0 auto}

/* ── type ─────────────────────────────────────── */
h1,h2,h3{font-family:'Fraunces',Georgia,serif;font-weight:600;line-height:1.08;letter-spacing:-.015em}
h1{font-size:clamp(2.4rem,6vw,4.3rem);font-weight:800}
h2{font-size:clamp(1.8rem,3.6vw,2.9rem)}
h3{font-size:1.28rem;font-weight:600}
p{max-width:var(--measure)}
.lead{font-size:clamp(1.05rem,1.9vw,1.28rem);color:var(--paper-dim);line-height:1.6}
.mono{font-family:'JetBrains Mono',monospace}

/* the eyebrow is a move number, because the page is a game */
.move-no{
  font-family:'JetBrains Mono',monospace;font-size:.78rem;letter-spacing:.18em;
  color:var(--blue-hi);text-transform:uppercase;display:flex;align-items:center;gap:12px;margin-bottom:14px;
}
.move-no::after{content:'';flex:1;height:1px;background:var(--rule);max-width:150px}

/* ── header ───────────────────────────────────── */
.top{position:sticky;top:0;z-index:60;background:rgba(1,16,30,.93);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--rule)}
.top-in{display:flex;align-items:center;gap:26px;padding:15px 0}
.brand{display:flex;align-items:center;gap:11px;font-family:'Fraunces',serif;font-size:1.1rem;
  font-weight:600;color:var(--paper);letter-spacing:-.01em;line-height:1.1}
.brand > span{display:flex;flex-direction:column}
.brand:hover{text-decoration:none}
.brand-logo{height:54px;width:auto;display:block}
.brand-tag{font-family:'JetBrains Mono',monospace;font-size:.58rem;letter-spacing:.22em;
  color:var(--blue-hi);text-transform:uppercase;margin-top:2px}
.nav{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav a{color:var(--paper-dim);font-size:.95rem;font-weight:500;padding:7px 13px;border-radius:7px}
.nav a:hover{color:var(--paper);background:rgba(244,246,249,.07);text-decoration:none}
.nav a.on{color:var(--blue-hi)}
.burger{display:none;margin-left:auto;background:none;border:1px solid var(--rule);color:var(--paper);
  border-radius:8px;padding:6px 12px;font-size:1.1rem;cursor:pointer}

/* ── buttons ──────────────────────────────────── */
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 26px;border-radius:9px;
  font-family:'Karla',sans-serif;font-size:1rem;font-weight:700;cursor:pointer;border:1.5px solid transparent;
  transition:transform .12s ease, background .15s ease}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-p{background:var(--blue);color:#fff;border-color:var(--blue)}
.btn-p:hover{background:var(--blue-hi);border-color:var(--blue-hi)}
.btn-o{border-color:rgba(244,246,249,.34);color:var(--paper)}
.btn-o:hover{border-color:var(--paper);background:rgba(244,246,249,.06)}
.btn-sm{padding:9px 17px;font-size:.92rem}
.btns{display:flex;gap:12px;flex-wrap:wrap}

/* ── sections ─────────────────────────────────── */
section{padding:clamp(64px,9vw,118px) 0}
section + section{border-top:1px solid var(--rule)}
.sec-paper{background:var(--paper);color:var(--navy)}
.sec-paper .lead{color:#40566B}
.sec-paper .move-no{color:#07437D}
.sec-paper .move-no::after{background:rgba(1,16,30,.14)}
.sec-paper a{color:#07437D}
/* Buttons carry their own colour — a section rule must not repaint the label. */
.sec-paper a.btn-p,.sec-paper .btn-p{color:#fff}
.sec-paper a.btn-o,.sec-paper .btn-o{color:var(--navy);border-color:rgba(1,16,30,.32)}
.sec-paper a.btn-o:hover{background:rgba(1,16,30,.05);border-color:var(--navy)}

/* ── HERO: board and scoresheet, side by side ─── */
.hero{padding:clamp(48px,7vw,84px) 0 clamp(56px,8vw,96px);position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;pointer-events:none;opacity:.045;
  background:repeating-conic-gradient(#F4F6F9 0 25%, transparent 0 50%) 0 0/86px 86px;
  -webkit-mask-image:radial-gradient(ellipse at 72% 40%, #000 0%, transparent 68%);
          mask-image:radial-gradient(ellipse at 72% 40%, #000 0%, transparent 68%)}
.hero .wrap{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:clamp(32px,5vw,64px);align-items:center}
.hero h1 em{font-style:normal;color:var(--blue-hi);position:relative;white-space:nowrap}
.hero .lead{margin:22px 0 30px}
.hero-note{margin-top:20px;font-size:.9rem;color:var(--paper-dim);display:flex;align-items:center;gap:8px}
.hero-note b{color:var(--paper)}

/* the signature: a real board with a scoresheet beside it */
.demo{display:grid;grid-template-columns:1fr 152px;gap:16px;align-items:start}
.demo-board{border:4px solid #5a3e20;border-radius:5px;overflow:hidden;box-shadow:0 22px 50px rgba(0,0,0,.55);
  aspect-ratio:1;width:100%}
.sheet{background:var(--paper);color:var(--navy);border-radius:5px;padding:12px 10px;
  box-shadow:0 14px 34px rgba(0,0,0,.4);font-family:'JetBrains Mono',monospace;font-size:.76rem;
  display:flex;flex-direction:column;
  /* Fixed to the board's height so filling it cannot shift the page. */
  height:min(46vw,430px);max-height:430px}
.sheet-list{flex:1;overflow-y:auto;min-height:0}
.sheet-h{font-family:'Karla',sans-serif;font-size:.62rem;letter-spacing:.15em;text-transform:uppercase;
  color:#6B7F92;display:grid;grid-template-columns:1.6rem 1fr 1fr;gap:4px;
  border-bottom:1.5px solid rgba(1,16,30,.4);padding-bottom:5px;margin-bottom:6px}
.sheet-row{display:grid;grid-template-columns:1.6rem 1fr 1fr;gap:4px;padding:2.5px 0;
  border-bottom:1px solid rgba(1,16,30,.09)}
.sheet-row span:first-child{color:#8496A6}
.sheet-row.live span:not(:first-child):last-of-type,
.sheet-row.live b{background:rgba(44,123,201,.3);border-radius:2px}
.sheet-cap{margin-top:9px;padding-top:9px;border-top:1px solid rgba(1,16,30,.12);flex:0 0 auto;
  font-family:'Karla',sans-serif;font-size:.64rem;color:#6B7F92;line-height:1.4}


/* ── the board on the dark hero ─────────────────
   classroom.css was written for the light admin panel; these few rules
   settle it into the marketing page without touching the product's own
   stylesheet. */
.demo-board.cb{border-color:#0A2136;box-shadow:0 22px 50px rgba(0,0,0,.6)}
.demo-board .cb-co{opacity:.8}
.demo .sheet{overflow-y:auto}
.demo .sheet::-webkit-scrollbar{width:5px}
.demo .sheet::-webkit-scrollbar-thumb{background:rgba(1,16,30,.22);border-radius:3px}

/* ── cards ────────────────────────────────────── */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(258px,1fr));gap:1px;
  background:var(--rule);border:1px solid var(--rule);border-radius:12px;overflow:hidden;margin-top:44px}
.card{background:var(--navy);padding:30px 26px}
.card .ico{font-size:1.5rem;color:var(--blue-hi);margin-bottom:14px;display:block;line-height:1}
.card h3{margin-bottom:9px}
.card p{color:var(--paper-dim);font-size:.97rem;line-height:1.6}
.sec-paper .cards{background:rgba(1,16,30,.13);border-color:rgba(1,16,30,.13)}
.sec-paper .card{background:var(--paper)}
.sec-paper .card p{color:#40566B}
.sec-paper .card .ico{color:#07437D}

/* ── the two-column scoresheet layout for content ── */
.pair{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(28px,4vw,56px);margin-top:40px}
.pair h3{margin-bottom:10px}
.pair p{color:var(--paper-dim);font-size:.99rem}
.sec-paper .pair p{color:#40566B}

/* ── pricing ──────────────────────────────────── */
.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(232px,1fr));gap:16px;margin-top:44px;align-items:start}
.plan{border:1px solid rgba(1,16,30,.16);border-radius:13px;padding:26px 22px;background:#FFFFFF;position:relative}
.plan.pick{border-color:var(--blue-hi);border-width:2px;box-shadow:0 12px 34px rgba(44,123,201,.2)}
.plan-tag{position:absolute;top:-11px;left:22px;background:var(--blue-hi);color:#FFFFFF;
  font-size:.68rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;padding:3px 11px;border-radius:20px}
.plan h3{font-size:1.14rem;margin-bottom:3px}
.plan .who{font-size:.85rem;color:#5F7488;margin-bottom:16px;min-height:2.6em;line-height:1.35}
.plan .amt{font-family:'Fraunces',serif;font-size:2.15rem;font-weight:800;line-height:1;color:var(--navy)}
.plan .per{font-size:.82rem;color:#5F7488;margin-top:4px}
.plan ul{list-style:none;margin:18px 0 22px;font-size:.92rem;color:#22384B;min-height:120px}
.plan li{padding:5px 0 5px 21px;position:relative;line-height:1.45}
.plan li::before{content:'♟';position:absolute;left:0;color:var(--board-d);font-size:.85rem}
.plan .btn{width:100%;justify-content:center}

/* ── quotes ───────────────────────────────────── */
.quote{border-left:3px solid var(--blue-hi);padding-left:26px;margin-top:36px}
.quote p{font-family:'Fraunces',serif;font-size:clamp(1.15rem,2.3vw,1.55rem);line-height:1.42;font-weight:400}
.quote cite{display:block;margin-top:14px;font-style:normal;font-size:.9rem;color:var(--paper-dim);
  font-family:'Karla',sans-serif}
.sec-paper .quote cite{color:#5F7488}

/* ── faq ──────────────────────────────────────── */
.faq{margin-top:40px;border-top:1px solid var(--rule)}
.faq details{border-bottom:1px solid var(--rule)}
.faq summary{padding:20px 0;cursor:pointer;font-weight:700;font-size:1.04rem;list-style:none;
  display:flex;align-items:center;gap:14px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:'+';color:var(--blue-hi);font-family:'JetBrains Mono',monospace;font-size:1.2rem}
.faq details[open] summary::before{content:'−'}
.faq p{padding:0 0 20px 30px;color:var(--paper-dim)}
.sec-paper .faq,.sec-paper .faq details{border-color:rgba(1,16,30,.14)}
.sec-paper .faq p{color:#40566B}

/* ── forms ────────────────────────────────────── */
.form{display:grid;gap:16px;margin-top:34px;max-width:560px}
.f2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
label{display:block;font-size:.82rem;font-weight:700;letter-spacing:.03em;margin-bottom:6px;color:var(--paper)}
.sec-paper label{color:var(--navy)}
input,select,textarea{width:100%;padding:12px 14px;border-radius:8px;font-family:'Karla',sans-serif;
  font-size:1rem;background:rgba(244,246,249,.06);border:1px solid var(--rule);color:var(--paper)}
.sec-paper input,.sec-paper select,.sec-paper textarea{background:#fff;border-color:rgba(1,16,30,.2);color:var(--navy)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--blue-hi);
  box-shadow:0 0 0 3px rgba(44,123,201,.2)}
textarea{min-height:118px;resize:vertical}
/* The open list is drawn by the OS; it needs telling explicitly, or the
   options render dark-on-dark. */
select{color-scheme:dark;appearance:none;
  background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23A9BACB' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;padding-right:38px}
select option{background:#0A1C2E;color:#F4F6F9}
.sec-paper select{color-scheme:light;
  background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%235F7488' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E")}
.sec-paper select option{background:#fff;color:#01101E}
.hint{font-size:.82rem;color:var(--paper-dim);margin-top:5px}
.sec-paper .hint{color:#5F7488}
.note{padding:14px 18px;border-radius:9px;font-size:.95rem;margin-bottom:22px}
.note-ok{background:rgba(126,155,106,.16);border:1px solid rgba(126,155,106,.4);color:#BFE3C4}
.note-err{background:rgba(198,64,40,.14);border:1px solid rgba(198,64,40,.4);color:#F3C2B8}
.sec-paper .note-ok{background:#E4F2E7;border-color:#8CC49A;color:#2C6B3F}
.sec-paper .note-err{background:#FBE6E1;border-color:#DCA294;color:#9B3A22}

/* ── footer ───────────────────────────────────── */
footer{background:var(--navy-2);border-top:1px solid var(--rule);padding:56px 0 30px}
.foot-grid{display:grid;grid-template-columns:1.6fr repeat(3,1fr);gap:34px}
footer h4{font-size:.74rem;letter-spacing:.15em;text-transform:uppercase;color:var(--blue-hi);margin-bottom:14px}
footer a{display:block;color:var(--paper-dim);font-size:.94rem;padding:4px 0}
footer a:hover{color:var(--paper)}
.foot-bottom{margin-top:42px;padding-top:22px;border-top:1px solid var(--rule);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.86rem;color:var(--paper-dim)}

/* ── legal pages ──────────────────────────────── */
.legal h2{margin:38px 0 12px;font-size:1.45rem}
.legal h3{margin:26px 0 8px}
.legal p,.legal li{color:var(--paper-dim);margin-bottom:12px}
.legal ul{margin:0 0 16px 22px}
.legal li{padding-left:4px}

/* ── responsive ───────────────────────────────── */
@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:38px}
  .demo{max-width:520px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:26px}
  .nav{display:none;order:5;width:100%;flex-direction:column;align-items:stretch;
    padding:10px 0 4px;border-top:1px solid var(--rule);margin:8px 0 0}
  .nav.open{display:flex}
  .nav a{padding:11px 4px;font-size:1.02rem}
  .top-in{flex-wrap:wrap}
  .burger{display:block}
  .pair{grid-template-columns:1fr;gap:26px}
}
@media (max-width:560px){
  .demo{grid-template-columns:1fr}
  .sheet{min-height:0;max-height:190px;overflow:hidden}
  .f2{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .btns .btn{width:100%;justify-content:center}
}