[hidden] { display: none !important; }
:root {
  --paper: #f5f2ea;
  --card: #ffffff;
  --ink: #1c201d;
  --muted: #5d5a52;
  --line: #d8d4c5;
  --grid: #b9b2a3;
  --blue: #1b6b43;
  --blue-soft: #e2f0e7;
  --warn: #b3261e;
  --warn-soft: #fbe7e5;
  --ok: #1d7a46;
  --hi: #fff1b8;
  --ca: #ffd9a8;
  --cb: #cfe0ff;
  --felt: #1e5b3e;
  --felt2: #164a31;
  --body: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #14171a;
    --card: #1d2124;
    --ink: #eceae4;
    --muted: #a8a49a;
    --line: #3a3d42;
    --grid: #565a61;
    --blue: #7fd6a2;
    --blue-soft: #1f2f26;
    --warn: #ff8f86;
    --warn-soft: #3a2220;
    --ok: #6fd69b;
    --hi: #4a4120;
    --ca: #5a3e1b;
    --cb: #22345a;
  }
}
* { box-sizing: border-box; }
html { overflow-x: clip; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.7 var(--body); }
a { color: var(--blue); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
img { max-width: 100%; height: auto; }
.wrap { max-width: 1120px; margin: 0 auto; padding-inline: 24px; }
.narrow { max-width: 780px; }

/* header */
.bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 18px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; color: var(--ink); text-decoration: none; font-size: 19px; }
.brand img { width: 30px; height: 30px; border-radius: 7px; }
.bar nav { display: flex; gap: 22px; flex-wrap: wrap; font-size: 15px; }
.bar nav a { color: var(--muted); text-decoration: none; padding-block: 4px; }
.bar nav a:hover, .bar nav a[aria-current="page"] { color: var(--ink); }
.bar nav a[aria-current="page"] { border-bottom: 2px solid var(--blue); }

/* footer */
footer { border-top: 1px solid var(--line); margin-top: 72px; padding-block: 28px 44px; font-size: 14px; color: var(--muted); }
footer .row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 28px; }
footer a { color: var(--muted); }
footer nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.langs { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-top: 18px; }
.langs span[aria-current] { color: var(--ink); font-weight: 600; }

/* type */
h1 { font-weight: 600; font-size: clamp(34px, 5.4vw, 58px); line-height: 1.12; letter-spacing: -.03em; margin: 16px 0 18px; }
h2 { font-weight: 600; font-size: clamp(24px, 3vw, 31px); line-height: 1.25; margin: 52px 0 14px; letter-spacing: -.01em; }
h3 { font-size: 20px; margin: 28px 0 8px; }
p, li { max-width: 74ch; }
.eyebrow { font-size: 13px; text-transform: uppercase; letter-spacing: .14em; color: var(--blue); font-weight: 600; margin: 0; }
.lead { font-size: 20px; color: var(--muted); max-width: 62ch; }
.crumbs { font-size: 14px; color: var(--muted); padding-top: 8px; }
.crumbs a { color: var(--muted); }
.crumbs .sep { margin-inline: 8px; }
.meta { font-size: 14px; color: var(--muted); margin: 0 0 24px; }

/* answer box */
.answer { background: var(--blue-soft); border-inline-start: 4px solid var(--blue); border-radius: 10px; padding: 18px 22px; margin: 26px 0 8px; }
.answer b { display: block; font-size: 13px; text-transform: uppercase; letter-spacing: .12em; color: var(--blue); margin-bottom: 6px; }
.answer p { margin: 0; }
.callout { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 18px; margin: 20px 0; }

/* body lists */
.article ol, .article ul { padding-inline-start: 1.3em; }
.article li { margin: 6px 0; }

/* diagrams */
figure.fig { margin: 26px 0; }
figure.fig figcaption { font-size: 15px; color: var(--muted); margin-top: 10px; max-width: 74ch; }
.dg-note { font-size: 13px; color: var(--muted); }

/* buttons & cta */
.play img { height: 62px; width: auto; display: block; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 1px solid var(--line); background: var(--card); color: var(--ink); border-radius: 10px; padding: 10px 16px; font: inherit; font-size: 15px; font-weight: 600; cursor: pointer; text-decoration: none; min-height: 44px; }
.btn:hover { border-color: var(--blue); }
.btn.primary { background: var(--blue); border-color: var(--blue); color: #fff; }
@media (prefers-color-scheme: dark) { .btn.primary { color: #0b1f14; } }
.btn[aria-pressed="true"] { background: var(--blue-soft); border-color: var(--blue); color: var(--blue); }
.cta-box { display: grid; grid-template-columns: 180px 1fr; gap: 28px; align-items: center; background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 24px; margin: 56px 0 0; }
.cta-box img { border-radius: 12px; border: 1px solid var(--line); width: 100%; }
.cta-box h2 { margin: 0 0 8px; font-size: 26px; }
.cta-box p { margin-top: 0; }
.badges { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.pill { font-size: 13px; color: var(--muted); }

/* faq */
.faq details { border-bottom: 1px solid var(--line); padding: 14px 0; }
.faq summary { cursor: pointer; font-weight: 600; list-style-position: outside; }
.faq details p { margin: 10px 0 0; }

/* cards */
ul.cards { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; }
ul.cards li { max-width: none; margin: 0; }
ul.cards a { display: block; height: 100%; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; text-decoration: none; color: var(--ink); }
ul.cards a:hover { border-color: var(--blue); }
ul.cards b { display: block; margin-bottom: 4px; }
ul.cards span { display: block; font-size: 14px; color: var(--muted); line-height: 1.5; }


/* home */
.hero { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; padding-block: 36px 8px; }
.hero .lead { margin-bottom: 22px; }
.preview { max-width: 520px; width: 100%; }
.daily { font-size: 13px; color: var(--muted); margin: 0 0 10px; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-top: 56px; border-top: 1px solid var(--line); }
.features h3 { font-size: 21px; }
.screens { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin: 24px 0; }
.screens img { width: 100%; border: 1px solid var(--line); border-radius: 12px; }

/* tools */
.tool { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 18px; margin: 24px 0; }
.tool-bar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 12px; }
.tool-bar .grow { flex: 1; }
.tool-stat { font-variant-numeric: tabular-nums; color: var(--muted); font-size: 15px; }
.tool-msg { min-height: 1.6em; margin: 12px 0 0; font-weight: 600; }
.tool-msg.ok { color: var(--ok); }
.tool-msg.bad { color: var(--warn); }
.tool select, .tool input[type="number"] { font: inherit; padding: 8px 10px; border: 1px solid var(--line); border-radius: 10px; background: var(--card); color: var(--ink); min-height: 44px; }
.tool input[type="number"] { width: 9.5em; }
.btn:disabled { opacity: .45; cursor: default; }
.kinfo { display: flex; flex-wrap: wrap; gap: 6px 20px; margin: 4px 0 12px; font-variant-numeric: tabular-nums; color: var(--muted); font-size: 15px; }
.kinfo b { color: var(--ink); }

/* the table and cards (also used by the home preview and guide diagrams) */
.kl { container-type: inline-size; max-width: 760px; }
.ktable { --gap: clamp(4px, 1.3cqw, 10px); --cw: calc((100cqw - 20px - 6 * var(--gap)) / 7); --ch: calc(var(--cw) * 1.4);
  background: radial-gradient(120% 100% at 50% 0%, var(--felt) 0%, var(--felt2) 100%); border-radius: 14px; padding: 10px; user-select: none; -webkit-user-select: none; }
.ktop { display: grid; grid-template-columns: repeat(7, var(--cw)); gap: var(--gap); margin-bottom: calc(var(--gap) * 1.6); }
.kcols { display: grid; grid-template-columns: repeat(7, var(--cw)); gap: var(--gap); align-items: start; }
.kpile { position: relative; height: var(--ch); }
.kcol { position: relative; min-height: calc(var(--ch) * var(--h, 1)); }
.kc, .kslot { position: absolute; left: 0; top: 0; width: var(--cw); height: var(--ch); border-radius: calc(var(--cw) * .1); box-sizing: border-box; }
.kcol .kc { top: calc(var(--y, 0) * var(--ch)); }
.kwaste .kc { left: calc(var(--n, 0) * var(--cw) * .28); }
.kslot { border: 2px dashed rgba(255,255,255,.28); color: rgba(255,255,255,.4); display: grid; place-items: center; font-size: calc(var(--cw) * .38); font-weight: 700; }
.kc { font-size: calc(var(--cw) * .3); font-family: Inter, system-ui, sans-serif; font-weight: 700; line-height: 1; }
.kc.up { background: #fff; color: #1a1a1a; box-shadow: 0 1px 2px rgba(0,0,0,.35); border: 1px solid #cfcfcf; }
.kc.up.red { color: #c4222b; }
.kc .i { position: absolute; left: 6%; top: 5%; }
.kc .s { position: absolute; left: 6%; top: 36%; font-size: .8em; }
.kc .big { position: absolute; right: 8%; bottom: 4%; font-size: 1.35em; opacity: .9; }
.kc.back { background: repeating-linear-gradient(45deg, #2a4f9e 0 6px, #31589f 6px 12px); border: 2px solid #fff; box-shadow: 0 1px 2px rgba(0,0,0,.4); }
.kc.mv { cursor: grab; touch-action: none; }
.kc.lifting { opacity: .3; }
.kc.hint, .kstock.hint .kc { outline: 3px solid #ffd54a; outline-offset: 1px; z-index: 3; }
.kc.nope { animation: nope .3s; }
.kstock { cursor: pointer; }
.kghost { position: fixed; z-index: 60; pointer-events: none; font-size: calc(var(--cw) * .3); }
.kghost .kc { position: absolute; }
@keyframes nope { 25% { transform: translateX(-4px); } 75% { transform: translateX(4px); } }
@media (prefers-reduced-motion: reduce) { .kc.nope { animation: none; } }
.kstats { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 10px; margin-top: 16px; }
.kstats div { background: var(--paper); border: 1px solid var(--line); border-radius: 10px; padding: 8px 12px; }
.kstats b { display: block; font-size: 20px; }
.kstats span { font-size: 12px; color: var(--muted); }
.kl-help { margin-top: 18px; }
.kl-help ul { padding-inline-start: 1.2em; margin: 8px 0 0; }

/* guide diagrams made of cards */
.kdg { margin: 0; }
.kdg .ktable { --cw: 62px; --ch: 87px; display: block; }
.kdg-row { display: flex; flex-wrap: wrap; gap: 14px 28px; align-items: flex-start; }
.kdg-group { display: grid; gap: 6px; }
.kdg-group > b { font-size: 13px; color: rgba(255,255,255,.85); font-weight: 600; }
.kdg .col { position: relative; width: var(--cw); height: calc(var(--ch) + var(--rows, 0) * var(--cw) * .42); }
.kdg .col .kc { top: calc(var(--k, 0) * var(--cw) * .42); }
.kdg .kc.target { outline: 3px solid #ffd54a; outline-offset: 1px; }
.kdg .kc.bad { outline: 3px solid #ff8f86; }
.kdg .row { display: flex; gap: 10px; }
.kdg .arrow { color: #fff; font-size: 24px; align-self: center; }
.kdg-wrap { overflow-x: auto; overflow-y: hidden; }

@media (max-width: 860px) {
  .hero, .features { grid-template-columns: 1fr; gap: 24px; }
  .screens { grid-template-columns: repeat(2, 1fr); }
  .cta-box { grid-template-columns: 1fr; }
  .cta-box img { max-width: 200px; }
  .wrap { padding-inline: 18px; }
}
@media print {
  .bar, footer, .no-print { display: none !important; }
}