/* Chalk — marketing page.
 *
 * A chalkboard, read at arm's length. Slate, chalk dust, and two colours of
 * chalk. Deliberately NOT the WTFC palette: different product, different
 * audience, different company. Where that site is heavy and dark on purpose,
 * this one is meant to feel like something a sixteen-year-old would open.
 *
 * Everything drawn — the strike-through, the underline, the tally, the card
 * edges — is wobbly SVG rather than straight CSS borders, because a ruler-
 * straight chalkboard reads as a UI kit, not a board somebody wrote on.
 */

:root{
  --board:#14181a;          /* slate */
  --board-deep:#0e1113;
  --board-lift:#1a1f22;
  --chalk:#eceae1;          /* never pure white — chalk is dusty */
  --chalk-mid:rgba(236,234,225,.62);
  --chalk-dim:rgba(236,234,225,.34);
  --chalk-line:rgba(236,234,225,.14);

  --yellow:#ffd75e;
  --coral:#ff7d6b;

  --s:clamp(20px,5vw,72px);
  --ease:cubic-bezier(.2,.9,.3,1);
}

*,*::before,*::after{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth;background:var(--board)}
body{
  background:var(--board);
  color:var(--chalk);
  font:400 17px/1.6 Inter,-apple-system,system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
h1,h2,h3{margin:0;font-family:'Bricolage Grotesque',Inter,sans-serif;font-weight:800;line-height:.98;letter-spacing:-.025em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
em{font-style:normal}
:focus-visible{outline:2px solid var(--yellow);outline-offset:3px}

.skip{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;padding:12px 18px;background:var(--yellow);color:#111;z-index:100}
.skip:focus{left:8px;top:8px;width:auto;height:auto;overflow:visible;clip-path:none}

/* ---------- chalk dust over the whole board ---------- */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.5;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='.35'/%3E%3C/svg%3E");
  mix-blend-mode:soft-light;
}
/* and the faint smear of a board that has been wiped a thousand times */
body::after{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(70% 45% at 18% 12%, rgba(236,234,225,.045), transparent 70%),
    radial-gradient(60% 40% at 86% 74%, rgba(236,234,225,.035), transparent 72%);
}
main,.top,.foot{position:relative;z-index:1}

/* ---------- header ---------- */
.top{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px var(--s);
  background:rgba(20,24,26,.72);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
          backdrop-filter:blur(16px) saturate(140%);
  box-shadow:inset 0 -1px 0 var(--chalk-line);
}
.mark{display:inline-flex;align-items:center;gap:10px}
.mark__word{font-family:'Bricolage Grotesque',sans-serif;font-weight:800;font-size:21px;letter-spacing:-.03em}
/* 正 — four strokes and a gate. The tally you keep on a board. */
.mark__tally{
  display:block;width:22px;height:20px;
  background:currentColor;
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 44 40'%3E%3Cg fill='none' stroke='%23000' stroke-width='5' stroke-linecap='round'%3E%3Cpath d='M6 7v27'/%3E%3Cpath d='M16 5v29'/%3E%3Cpath d='M26 7v27'/%3E%3Cpath d='M36 6v28'/%3E%3Cpath d='M2 30 41 9'/%3E%3C/g%3E%3C/svg%3E") center/contain no-repeat;
          mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 44 40'%3E%3Cg fill='none' stroke='%23000' stroke-width='5' stroke-linecap='round'%3E%3Cpath d='M6 7v27'/%3E%3Cpath d='M16 5v29'/%3E%3Cpath d='M26 7v27'/%3E%3Cpath d='M36 6v28'/%3E%3Cpath d='M2 30 41 9'/%3E%3C/g%3E%3C/svg%3E") center/contain no-repeat;
  color:var(--yellow);
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:15px 26px;border:0;cursor:pointer;font-family:inherit;
  background:var(--yellow);color:#14181a;
  font-weight:600;font-size:15px;letter-spacing:-.01em;
  border-radius:999px;
  transition:transform .3s var(--ease),background .3s,box-shadow .3s;
  box-shadow:0 6px 0 rgba(0,0,0,.28);
}
.btn:hover{transform:translateY(-2px);box-shadow:0 8px 0 rgba(0,0,0,.28)}
.btn:active{transform:translateY(3px);box-shadow:0 2px 0 rgba(0,0,0,.28)}
.btn--sm{padding:10px 18px;font-size:13.5px;box-shadow:0 4px 0 rgba(0,0,0,.28)}
.btn--big{padding:20px 40px;font-size:18px}
.btn--ghost{
  background:transparent;color:var(--chalk);
  box-shadow:inset 0 0 0 1.5px var(--chalk-line);
}
.btn--ghost:hover{box-shadow:inset 0 0 0 1.5px var(--chalk-dim);background:rgba(236,234,225,.05)}

/* ---------- hero ---------- */
.hero{padding:clamp(56px,11vw,128px) var(--s) clamp(40px,7vw,80px);max-width:1180px;margin:0 auto}
.kick{
  font:600 12px/1 Inter,sans-serif;letter-spacing:.18em;text-transform:uppercase;
  color:var(--yellow);margin-bottom:clamp(18px,3vw,26px);
}
.kick--dark{color:#8a5c14}
.hero__h{font-size:clamp(42px,9.5vw,116px);max-width:15ch}
.hero__p{margin-top:clamp(20px,3vw,30px);max-width:52ch;color:var(--chalk-mid);font-size:clamp(17px,2.1vw,21px);line-height:1.5}
.hero__row{display:flex;flex-wrap:wrap;gap:14px;margin-top:clamp(26px,4vw,40px)}
.hero__note{margin-top:16px;color:var(--chalk-dim);font-size:14px}

/* struck through, by hand */
.scratch{position:relative;white-space:nowrap;color:var(--chalk-dim)}
.scratch::after{
  content:"";position:absolute;left:-2%;right:-2%;top:52%;height:.5em;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 20' preserveAspectRatio='none'%3E%3Cpath d='M3 13C38 7 72 14 104 8c30-6 62 3 93-3' fill='none' stroke='%23ff7d6b' stroke-width='4' stroke-linecap='round'/%3E%3C/svg%3E") center/100% 100% no-repeat;
}
/* underlined, by hand */
.under{position:relative;white-space:nowrap}
.under::after{
  content:"";position:absolute;left:-1%;right:-1%;top:98%;height:.28em;
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 14' preserveAspectRatio='none'%3E%3Cpath d='M4 9c40-5 76 4 114-1 28-4 52 2 78-2' fill='none' stroke='%23ffd75e' stroke-width='5' stroke-linecap='round'/%3E%3C/svg%3E") center/100% 100% no-repeat;
}

/* ---------- the tally board ---------- */
.board{
  margin-top:clamp(44px,7vw,84px);padding:clamp(20px,3vw,30px);
  background:var(--board-deep);
  box-shadow:inset 0 0 0 1.5px var(--chalk-line),0 20px 50px rgba(0,0,0,.4);
  border-radius:14px;
}
.board__inner{display:flex;flex-wrap:wrap;gap:clamp(8px,1.4vw,16px);align-items:flex-end;min-height:44px}
.board__tally{
  width:clamp(20px,2.6vw,30px);aspect-ratio:44/40;flex:none;
  background:var(--chalk);opacity:0;transform:translateY(6px) rotate(var(--r,0deg));
  transition:opacity .5s var(--ease),transform .5s var(--ease);
  transition-delay:var(--d,0s);
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 44 40'%3E%3Cg fill='none' stroke='%23000' stroke-width='5' stroke-linecap='round'%3E%3Cpath d='M6 7v27'/%3E%3Cpath d='M16 5v29'/%3E%3Cpath d='M26 7v27'/%3E%3Cpath d='M36 6v28'/%3E%3Cpath d='M2 30 41 9'/%3E%3C/g%3E%3C/svg%3E") center/contain no-repeat;
          mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 44 40'%3E%3Cg fill='none' stroke='%23000' stroke-width='5' stroke-linecap='round'%3E%3Cpath d='M6 7v27'/%3E%3Cpath d='M16 5v29'/%3E%3Cpath d='M26 7v27'/%3E%3Cpath d='M36 6v28'/%3E%3Cpath d='M2 30 41 9'/%3E%3C/g%3E%3C/svg%3E") center/contain no-repeat;
}
.board.is-in .board__tally{opacity:.9;transform:translateY(0) rotate(var(--r,0deg))}
.board__tally:last-child{background:var(--yellow)}
.board__label{display:block;margin-top:16px;font:600 11px/1 Inter,sans-serif;letter-spacing:.2em;text-transform:uppercase;color:var(--chalk-dim)}

/* ---------- the statement ---------- */
.say{padding:clamp(60px,10vw,130px) var(--s);max-width:920px;margin:0 auto;display:grid;gap:clamp(18px,2.6vw,26px)}
.say__big{
  font-family:'Bricolage Grotesque',sans-serif;font-weight:600;
  font-size:clamp(26px,4.6vw,50px);line-height:1.12;letter-spacing:-.02em;
}
.say__big em{color:var(--yellow)}
.say__small{color:var(--chalk-mid);max-width:60ch;font-size:clamp(16px,1.9vw,19px)}

/* ---------- mechanics ---------- */
.how{padding:clamp(20px,4vw,50px) var(--s) clamp(60px,10vw,120px);max-width:1180px;margin:0 auto}
.h2{font-size:clamp(28px,5vw,58px);margin-bottom:clamp(30px,5vw,54px);max-width:18ch}
.h2--dark{color:#14181a}
.cards{display:grid;gap:clamp(14px,2vw,22px);grid-template-columns:repeat(auto-fit,minmax(min(290px,100%),1fr))}
.card{
  position:relative;padding:clamp(24px,3vw,34px);
  background:var(--board-lift);
  border-radius:16px;
  box-shadow:inset 0 0 0 1.5px var(--chalk-line);
  transition:transform .45s var(--ease),box-shadow .45s var(--ease);
}
.card:hover{transform:translateY(-4px);box-shadow:inset 0 0 0 1.5px var(--chalk-dim)}
.card__n{font-family:'Bricolage Grotesque',sans-serif;font-weight:800;font-size:13px;color:var(--yellow);letter-spacing:.06em}
.card__tag{
  float:right;font:600 10.5px/1 Inter,sans-serif;letter-spacing:.14em;text-transform:uppercase;
  color:var(--chalk-dim);padding:5px 10px;border-radius:999px;
  box-shadow:inset 0 0 0 1px var(--chalk-line);
}
.card__t{margin-top:16px;font-family:'Bricolage Grotesque',sans-serif;font-weight:600;font-size:clamp(20px,2.4vw,25px);line-height:1.15;letter-spacing:-.02em}
.card__b{margin-top:12px;color:var(--chalk-mid);font-size:15.5px;line-height:1.62}
.card:nth-child(2) .card__n,.card:nth-child(5) .card__n{color:var(--coral)}

/* ---------- coaches: the chalk side of the board ---------- */
.coach{background:var(--yellow);color:#14181a;padding:clamp(56px,9vw,112px) var(--s)}
.coach__inner{max-width:900px;margin:0 auto}
.ticks{display:grid;gap:14px;margin-top:clamp(24px,3vw,32px)}
.ticks li{position:relative;padding-left:34px;font-size:clamp(16px,1.9vw,19px);color:#221a07;font-weight:500}
.ticks li::before{
  content:"";position:absolute;left:0;top:.35em;width:20px;height:16px;
  background:#14181a;
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 18'%3E%3Cpath d='M2 9.5 8.5 16 22 2' fill='none' stroke='%23000' stroke-width='4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat;
          mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 18'%3E%3Cpath d='M2 9.5 8.5 16 22 2' fill='none' stroke='%23000' stroke-width='4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* ---------- end ---------- */
.end{padding:clamp(70px,12vw,150px) var(--s);text-align:center;display:grid;gap:clamp(26px,4vw,38px);justify-items:center}
.end__h{font-size:clamp(32px,7vw,78px);max-width:14ch}

/* ---------- footer ---------- */
.foot{
  display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;justify-content:space-between;
  padding:26px var(--s) 40px;box-shadow:inset 0 1px 0 var(--chalk-line);
  color:var(--chalk-dim);font-size:13.5px;
}
.foot__mark{display:inline-flex;align-items:center;gap:9px;color:var(--chalk-mid)}
.foot__mark b{font-family:'Bricolage Grotesque',sans-serif;font-weight:800;letter-spacing:-.02em}

/* ---------- reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
[data-reveal].is-in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  [data-reveal]{opacity:1;transform:none;transition:none}
  .board__tally{opacity:.9;transform:none;transition:none}
}