:root {
  --bg: #0b0d10;
  --bg-2: #12151a;
  --bg-3: #171b21;
  --line: #24292f;
  --line-2: #2f3540;
  --ink: #e8ecf1;
  --ink-2: #aab4c0;
  --ink-3: #7d8894;
  --ink-4: #5d666f;
  --accent: #6ea8fe;
  --accent-dim: rgba(110, 168, 254, 0.14);
  --good: #5ecf8f;
  --warn: #e8b661;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --safe-t: env(safe-area-inset-top, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  overscroll-behavior-y: none;
}

/* ---------------------------------------------------------------- top */

.top {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(11, 13, 16, 0.94);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--line);
  padding-top: var(--safe-t);
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px 2px;
}

.brand .mark {
  color: var(--accent);
  font-size: 15px;
}

.brand .name {
  font-size: 14px;
  font-weight: 650;
  letter-spacing: 0.02em;
}

.brand .feedlink {
  margin-left: auto;
  color: var(--ink-3);
  font-size: 12.5px;
  text-decoration: none;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  padding: 3px 10px;
}

.tabs {
  display: flex;
  gap: 6px;
  padding: 8px 14px 0;
}

.tab {
  flex: 1;
  appearance: none;
  border: 1px solid var(--line-2);
  background: var(--bg-2);
  color: var(--ink-2);
  font: inherit;
  font-size: 13.5px;
  font-weight: 600;
  padding: 8px 10px;
  border-radius: 9px;
}

.tab.is-on {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}

.pills {
  display: flex;
  gap: 7px;
  overflow-x: auto;
  padding: 10px 14px 11px;
  scrollbar-width: none;
}

.pills::-webkit-scrollbar {
  display: none;
}

.pill {
  flex: 0 0 auto;
  appearance: none;
  border: 1px solid var(--line-2);
  background: var(--bg-2);
  color: var(--ink-2);
  font: inherit;
  font-size: 12.5px;
  font-weight: 550;
  padding: 6px 12px;
  border-radius: 999px;
  white-space: nowrap;
}

.pill.is-on {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--bg);
  font-weight: 650;
}

/* --------------------------------------------------------------- main */

.main {
  padding: 18px 14px calc(90px + var(--safe-b));
  max-width: 780px;
  margin: 0 auto;
}

.h-name {
  font-size: 27px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
  line-height: 1.15;
}

.h-kind {
  display: inline-block;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 1px 8px;
  vertical-align: 4px;
  margin-left: 8px;
}

.h-tag {
  color: var(--ink-2);
  font-size: 15px;
  margin: 8px 0 0;
}

h2.h2 {
  font-size: 17px;
  font-weight: 650;
  letter-spacing: -0.01em;
  margin: 30px 0 10px;
}

p.lead {
  color: var(--ink-2);
  font-size: 15px;
  margin: 0 0 12px;
}

.hook {
  border-left: 2px solid var(--accent);
  padding: 2px 0 2px 13px;
  margin: 18px 0 4px;
}

.hook .t {
  font-weight: 650;
  font-size: 15px;
}

.hook p {
  color: var(--ink-2);
  font-size: 15px;
  margin: 0;
}

.punch {
  border-top: 1px solid var(--line-2);
  margin: 30px 0 8px;
  padding-top: 14px;
}

.punch .t {
  font-weight: 650;
  font-size: 14px;
  margin-bottom: 2px;
}

.punch p {
  color: var(--ink-2);
  margin: 0;
  font-size: 15px;
}

/* two-column requirement lists collapse on phones */
.reqs {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 16px 0 4px;
}

@media (min-width: 620px) {
  .reqs {
    grid-template-columns: 1fr 1fr;
  }
}

.reqs h4 {
  font-size: 12.5px;
  margin: 0 0 7px;
  letter-spacing: 0.01em;
}

.reqs .must h4 {
  color: var(--good);
}

.reqs .qual h4 {
  color: var(--warn);
}

.reqs li {
  color: var(--ink-2);
  font-size: 14.5px;
  margin-bottom: 5px;
}

.reqs ul {
  margin: 0;
  padding-left: 17px;
}

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 4px;
}

.stat {
  flex: 1 1 45%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-2);
  padding: 10px 12px;
}

.stat .v {
  font-family: var(--mono);
  font-size: 19px;
  font-weight: 600;
  color: var(--accent);
}

.stat .l {
  font-size: 12px;
  color: var(--ink-3);
}

.steps {
  margin: 14px 0 4px;
  padding: 0;
  list-style: none;
  counter-reset: s;
}

.steps li {
  counter-increment: s;
  position: relative;
  padding-left: 30px;
  margin-bottom: 9px;
  color: var(--ink-2);
  font-size: 14.5px;
}

.steps li::before {
  content: counter(s);
  position: absolute;
  left: 0;
  top: 2px;
  width: 19px;
  height: 19px;
  border-radius: 999px;
  background: var(--accent);
  color: #08111f;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  display: grid;
  place-items: center;
}

.useit {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 16px 0 4px;
}

@media (min-width: 620px) {
  .useit {
    grid-template-columns: 1fr 1fr;
  }
}

.card {
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--bg-2);
  padding: 13px 14px;
  margin: 12px 0;
}

.card .ct {
  font-weight: 650;
  font-size: 14.5px;
  margin-bottom: 5px;
}

.card p {
  margin: 0;
  color: var(--ink-2);
  font-size: 14.5px;
}

.callout {
  border: 1px solid var(--line-2);
  border-left: 3px solid var(--accent);
  border-radius: 9px;
  background: var(--bg-2);
  padding: 12px 14px;
  margin: 16px 0;
}

.callout.warning {
  border-left-color: var(--warn);
}

.callout.success {
  border-left-color: var(--good);
}

.callout .ct {
  font-weight: 650;
  font-size: 14px;
  margin-bottom: 4px;
}

.callout p {
  margin: 0;
  color: var(--ink-2);
  font-size: 14.5px;
}

pre.code {
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #090b0e;
  padding: 12px 13px;
  overflow-x: auto;
  margin: 14px 0;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--ink-2);
}

pre.code .cm {
  color: var(--ink-4);
}

/* tables scroll horizontally rather than squashing */
.twrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
  margin: 12px 0;
}

table {
  border-collapse: collapse;
  width: 100%;
  min-width: 540px;
  font-size: 13.5px;
}

th,
td {
  text-align: left;
  padding: 9px 11px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  color: var(--ink-3);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: var(--bg-3);
}

td {
  color: var(--ink-2);
}

td:nth-child(2) {
  color: var(--ink);
  font-weight: 550;
}

tr:last-child td {
  border-bottom: 0;
}

/* ------------------------------------------------------------ diagram */

.dwrap {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-2);
  margin: 12px 0 10px;
  overflow: hidden;
}

.dbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 9px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-3);
}

.dbar .zl {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  margin-right: auto;
  padding-left: 3px;
}

.zb {
  appearance: none;
  border: 1px solid var(--line-2);
  background: var(--bg-2);
  color: var(--ink-2);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  width: 31px;
  height: 27px;
  border-radius: 7px;
  display: grid;
  place-items: center;
}

.zb.wide {
  width: auto;
  padding: 0 10px;
  font-size: 11.5px;
}

.dstage {
  position: relative;
  height: 62vh;
  min-height: 330px;
  max-height: 560px;
  overflow: hidden;
  touch-action: none;
  cursor: grab;
  background:
    radial-gradient(circle at 1px 1px, var(--line) 1px, transparent 0) 0 0 / 22px 22px;
}

.dstage.is-drag {
  cursor: grabbing;
}

.dstage svg {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 0 0;
}

.legend {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-4);
  padding: 7px 11px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
}

.dnote {
  color: var(--ink-3);
  font-size: 13px;
  margin: 0 0 6px;
}

/* svg node styling */
.n rect {
  fill: var(--bg-3);
  stroke: var(--line-2);
  stroke-width: 1;
}

.n.near rect {
  stroke: var(--ink-3);
  stroke-width: 1.4;
}

.n.on rect {
  fill: var(--accent-dim);
  stroke: var(--accent);
  stroke-width: 2;
}

.n .nm {
  fill: var(--ink);
  font-weight: 650;
}

.n.on .nm {
  fill: var(--accent);
}

.n .st {
  fill: var(--ink-4);
}

.n .at {
  fill: var(--ink-3);
}

.n .me {
  fill: var(--ink-2);
}

.n .rule {
  stroke: var(--line);
}

.n.dim {
  opacity: 0.42;
}

.e line {
  stroke: var(--ink-4);
  stroke-width: 1.1;
}

.e text {
  fill: var(--ink-4);
}

.e.hot line {
  stroke: var(--accent);
  stroke-width: 1.9;
}

.e.hot text {
  fill: var(--accent);
}

.e.dim {
  opacity: 0.25;
}

/* -------------------------------------------------------------- sheet */

.sheet-scrim {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: rgba(0, 0, 0, 0.55);
}

.sheet {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 61;
  max-height: 78vh;
  background: var(--bg-2);
  border-top: 1px solid var(--line-2);
  border-radius: 16px 16px 0 0;
  box-shadow: 0 -14px 40px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  animation: rise 0.18s ease-out;
}

@keyframes rise {
  from {
    transform: translateY(18px);
    opacity: 0.6;
  }
}

.sheet-grip {
  flex: 0 0 auto;
  width: 42px;
  height: 4px;
  border-radius: 999px;
  background: var(--line-2);
  margin: 9px auto 4px;
}

.sheet-body {
  overflow-y: auto;
  padding: 6px 16px calc(20px + var(--safe-b));
  -webkit-overflow-scrolling: touch;
}

.sh-name {
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 650;
  margin: 0;
  color: var(--accent);
}

.sh-stereo {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-4);
}

.sh-role {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 2px 9px;
  margin-top: 7px;
}

.sh-what {
  color: var(--ink-2);
  font-size: 14.8px;
  margin: 11px 0 0;
}

.sh-h {
  font-size: 11.5px;
  font-weight: 650;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 18px 0 6px;
}

.sh-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.sh-list li {
  font-family: var(--mono);
  font-size: 12.3px;
  color: var(--ink-2);
  padding: 3px 0;
  border-bottom: 1px dashed var(--line);
}

.sh-list li:last-child {
  border-bottom: 0;
}

.sh-rels {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.rel {
  appearance: none;
  border: 1px solid var(--line-2);
  background: var(--bg-3);
  color: var(--ink-2);
  font: inherit;
  font-size: 12px;
  padding: 5px 11px;
  border-radius: 999px;
  text-align: left;
}

.rel b {
  color: var(--ink);
  font-family: var(--mono);
  font-weight: 600;
}

.sh-close {
  appearance: none;
  width: 100%;
  margin-top: 18px;
  border: 1px solid var(--line-2);
  background: var(--bg-3);
  color: var(--ink-2);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 11px;
  border-radius: 10px;
}

.emptyish {
  color: var(--ink-4);
  font-size: 13.5px;
  font-style: italic;
}