/* Drums — a practice-room notebook. The app's light theme (paper, green ink, copper) as a
   long page; sections open on a lit step grid; display type stretches like a drum roll.
   Display: Anybody (variable width). Text: Onest. Numbers and notes: JetBrains Mono. */

:root {
  --page-bg: #f3f1e8;
  --page-text: #20342a;
  --page-muted: #4f6656;
  --page-line: #c9d3c3;
  --page-accent: #8a5420;
  --page-ui: "Onest", system-ui, sans-serif;
  --paper: #faf8ef;
  --sheet: #fffdf6;
  --ink: #20342a;
  --mint: #2f6a48;
  --copper: #8a5420;
  --kick: #b0482b;
  --snare: #2f6a48;
  --hat: #3d6f9a;
  --display: "Anybody", "Onest", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --measure: 68ch;
  color-scheme: light;
}

html { background: var(--page-bg); }
body { color: var(--page-text); font: 17px/1.62 var(--page-ui); }
a { color: var(--mint); text-underline-offset: 3px; }
a:hover { color: var(--copper); }
:focus-visible { outline: 2.5px solid var(--copper); outline-offset: 3px; border-radius: 2px; }
::selection { background: #e5d7b9; }
code, kbd { font: 0.84em var(--mono); background: #e8ecdf; border-radius: 3px; padding: 0.06em 0.34em; color: #1d3326; }
kbd { border: 1px solid var(--page-line); border-bottom-width: 2px; }
em { font-style: italic; }
b, strong { font-weight: 650; }

main { max-width: 1160px; margin: 0 auto; padding: 0 clamp(18px, 4vw, 52px); }
main p, main li { max-width: var(--measure); }

/* ── hero ─────────────────────────────────────────────────────────────────── */
.hero { display: grid; gap: 34px; padding: clamp(36px, 7vh, 76px) 0 30px; }
@media (min-width: 1080px) { .hero { grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr); align-items: center; } }
.kicker { display: flex; align-items: center; gap: 12px; margin: 0 0 18px; font: 500 12.5px/1 var(--mono); color: var(--page-muted); }
.steps { display: inline-flex; gap: 3px; }
.steps i { width: 9px; height: 14px; border-radius: 2px; background: #dfe5d8; box-shadow: inset 0 0 0 1px var(--page-line); }
.steps i.on { background: var(--copper); box-shadow: none; }
.hero h1 {
  margin: 0; font: 800 clamp(44px, 6.6vw, 88px)/0.92 var(--display); font-stretch: 72%;
  letter-spacing: -0.01em; color: var(--ink); text-transform: uppercase;
}
.hero h1 span { color: var(--copper); font-stretch: 140%; }
.lede { margin: 22px 0 0; font-size: clamp(17px, 1.45vw, 19.5px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 24px 0 0; }
.btn {
  display: inline-flex; align-items: center; padding: 11px 18px; border-radius: 5px; text-decoration: none;
  font: 650 15px/1 var(--page-ui); color: var(--ink); border: 1.5px solid var(--ink);
}
.btn:hover { background: #e8ecdf; color: var(--ink); }
.btn.primary { background: var(--ink); color: var(--paper); }
.btn.primary:hover { background: var(--copper); border-color: var(--copper); color: #fff; }
.hint { margin-top: 14px; font-size: 14.5px; color: var(--page-muted); }

.shot { margin: 0; }
.shot img { display: block; width: 100%; height: auto; border-radius: 8px; box-shadow: 0 1px 0 #fff inset, 0 18px 40px -18px #20342a66, 0 0 0 1px #20342a22; }
.shot figcaption { margin-top: 10px; font-size: 14px; color: var(--page-muted); }
.part > .shot { margin: 8px 0 30px; }

/* ── sections ─────────────────────────────────────────────────────────────── */
.part { padding-top: 60px; }
.part h2 {
  display: flex; align-items: center; gap: 16px; margin: 0 0 20px;
  font: 780 clamp(30px, 3.6vw, 46px)/1 var(--display); font-stretch: 62%; text-transform: uppercase; letter-spacing: 0.005em; color: var(--ink);
}
.part h2 .grid {
  flex: none; width: 74px; height: 22px;
  background:
    linear-gradient(var(--copper), var(--copper)) 0 0 / 8px 100% no-repeat,
    linear-gradient(var(--copper), var(--copper)) 40px 0 / 8px 100% no-repeat,
    repeating-linear-gradient(90deg, #dfe5d8 0 8px, transparent 8px 10px);
  border-radius: 2px;
}
.part:nth-of-type(2n) h2 .grid { background:
    linear-gradient(var(--copper), var(--copper)) 10px 0 / 8px 100% no-repeat,
    linear-gradient(var(--copper), var(--copper)) 50px 0 / 8px 100% no-repeat,
    linear-gradient(var(--copper), var(--copper)) 60px 0 / 8px 100% no-repeat,
    repeating-linear-gradient(90deg, #dfe5d8 0 8px, transparent 8px 10px); }
.part h3 { margin: 28px 0 8px; font: 700 20px/1.2 var(--display); font-stretch: 88%; color: var(--ink); }

.cols { display: grid; gap: 4px 44px; }
@media (min-width: 980px) { .cols { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.cols h3:first-child { margin-top: 16px; }

.facts { list-style: none; padding: 0; margin: 26px 0 0; display: grid; gap: 12px 40px; max-width: none; }
@media (min-width: 980px) { .facts:not(.single) { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.facts li { position: relative; padding: 12px 14px 12px 16px; background: var(--sheet); border: 1px solid var(--page-line); border-left: 4px solid var(--mint); border-radius: 4px; }
.facts b { color: var(--ink); }

/* ── figures and tables ───────────────────────────────────────────────────── */
.fig { margin: 26px 0; padding: 18px 18px 14px; background: var(--sheet); border: 1px solid var(--page-line); border-radius: 6px; }
.fig.small { padding: 12px 12px 10px; }
.fig figcaption { margin-top: 10px; font-size: 14px; color: var(--page-muted); }
.fig figcaption b { color: var(--ink); }

.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; margin: 18px 0 6px; font-size: 15px; background: var(--sheet); border: 1px solid var(--page-line); }
caption { text-align: left; font: 700 13px/1.2 var(--page-ui); text-transform: uppercase; letter-spacing: 0.06em; color: var(--page-muted); padding: 0 0 8px; }
th, td { padding: 8px 12px; border-bottom: 1px solid var(--page-line); text-align: left; }
thead th { font: 600 12px/1.2 var(--mono); color: var(--page-muted); background: #eef1e7; }
td { font: 600 14.5px/1.3 var(--mono); color: var(--copper); }
.limits th { font-weight: 500; }
.note { font-size: 14px; color: var(--page-muted); }

ol.steps { counter-reset: step; list-style: none; padding: 0; margin: 10px 0 0; display: grid; gap: 10px; max-width: 74ch; }
ol.steps li { counter-increment: step; position: relative; padding: 12px 14px 12px 58px; background: var(--sheet); border: 1px solid var(--page-line); border-radius: 6px; max-width: none; }
ol.steps li::before {
  content: counter(step); position: absolute; left: 12px; top: 10px; width: 32px; height: 32px; display: grid; place-items: center;
  font: 800 17px/1 var(--display); font-stretch: 80%; color: var(--paper); background: var(--ink); border-radius: 4px;
}

/* ── drawings ─────────────────────────────────────────────────────────────── */
.dg { --k: var(--ink); overflow: visible; }
.dg text { font-family: var(--page-ui); fill: var(--page-text); }
.dg .m { font-family: var(--mono); }
.dg .k-ink { --k: #2c4437; } .dg .k-accent { --k: var(--copper); }
.dg .k-a { --k: var(--kick); } .dg .k-b { --k: var(--snare); } .dg .k-c { --k: var(--hat); } .dg .k-d { --k: #7a5aa0; }
.dg .k-ok { --k: var(--mint); } .dg .k-err { --k: #b0482b; } .dg .k-muted { --k: #8a9a8e; } .dg .k-file { --k: #6b7d6d; }
.dg .node { fill: var(--paper); stroke: var(--k); stroke-width: 1.6; }
.dg .shadow { fill: color-mix(in srgb, var(--k) 18%, transparent); stroke: none; }
.dg .lbl { fill: var(--ink); font-weight: 650; }
.dg .sub { fill: var(--page-muted); }
.dg .edge { fill: none; stroke: var(--k); }
.dg .edge.dash { stroke-dasharray: 6 4; }
.dg .tip { fill: var(--k); stroke: none; }
.dg .tip.open { fill: none; stroke: var(--k); stroke-width: 1.5; }
.dg .lab-bg { fill: var(--sheet); }
.dg .elabel { fill: color-mix(in srgb, var(--k) 75%, var(--ink)); }
.dg .halo { paint-order: stroke; stroke: var(--sheet); stroke-width: 4px; stroke-linejoin: round; }
.dg .grp { fill: none; stroke: var(--k); }
.dg line.bar { stroke: #8fa293; stroke-width: 1.2; }
.dg line.beat { stroke: #dbe2d4; stroke-width: 1; }
.dg line.tick16 { stroke: #ebefe5; stroke-width: 1; }
.dg line.thresh { stroke: var(--copper); stroke-dasharray: 4 3; }
.dg .axis { fill: #5f7466; }
.dg .hit { fill: var(--k); }
.dg .onset { fill: var(--ink); }
.dg .fitgrid { stroke: var(--copper); stroke-width: 2; }
.dg .curve { fill: none; stroke: var(--k); stroke-width: 2; stroke-linejoin: round; }
.dg .pick { stroke: var(--k); stroke-width: 1.5; stroke-dasharray: 3 3; }
.dg .dot { fill: var(--k); stroke: var(--sheet); stroke-width: 2; }
.dg .hit-a { fill: var(--k); }
.dg .hit-n { fill: color-mix(in srgb, var(--k) 45%, var(--sheet)); }
.dg .cyc { stroke: var(--k); stroke-width: 2; }
.dg .note { fill: var(--k); }
.dg .note.ghost { fill: none; stroke: var(--k); stroke-dasharray: 3 2; }
.dg .note-l { fill: var(--sheet); }
.dg .sw { fill: color-mix(in srgb, var(--k) 30%, var(--sheet)); stroke: var(--k); }

@media (max-width: 640px) {
  body { font-size: 16.5px; }
  .fig { padding: 12px; margin-left: -6px; margin-right: -6px; }
  .part h2 .grid { width: 40px; }
  .limits tr { display: grid; grid-template-columns: 1fr auto; }
  .limits th, .limits td { border-bottom: 1px solid var(--page-line); }
  td { white-space: nowrap; }
}
@media print {
  .hero-actions, .hint { display: none; }
}