/* Kumiki site. The page follows the app's commit graph: a lane runs down the left, one node per section. */
:root {
  --bg: #1C1B19; --panel: #22211F; --raised: #2B2A27; --line: #383633;
  --ink: #E6E3DD; --ink-2: #A5A19A; --ink-3: #8A867F;
  --indigo: #93A9C3; --teal: #8AB5AF; --ochre: #C3A67C; --on-indigo: #1C1B19;
  --sans: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Hiragino Sans", sans-serif;
  --rail: 88px;
  color-scheme: dark;
}
:lang(ja) { --sans: "Pretendard JP Variable", "Pretendard JP", -apple-system, BlinkMacSystemFont, "Hiragino Sans", sans-serif; }
@media (prefers-color-scheme: light) {
  :root {
    --bg: #FFFFFF; --panel: #F7F6F3; --raised: #EFEDE9; --line: #E3E0DA;
    --ink: #23221F; --ink-2: #5F5C56; --ink-3: #75716A;
    --indigo: #3A5A80; --teal: #4F7A74; --ochre: #8F7550; --on-indigo: #FFFFFF;
    color-scheme: light;
  }
}
@media (max-width: 720px) { :root { --rail: 40px; } }

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans);
  font-size: 17px; line-height: 1.65; letter-spacing: -0.01em;
  word-break: keep-all; overflow-wrap: anywhere;
}
html:lang(ja) body { word-break: normal; line-break: strict; letter-spacing: 0; }
html:lang(ja) :is(h1, h2, h3, .lede) { word-break: auto-phrase; }
a { color: inherit; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--indigo); outline-offset: 3px; border-radius: 4px; }
.wrap { max-width: 1200px; margin: 0 auto; padding-left: max(20px, env(safe-area-inset-left, 0px)); padding-right: max(20px, env(safe-area-inset-right, 0px)); }
.skip { position: absolute; left: -999px; top: 8px; background: var(--indigo); color: var(--on-indigo); padding: 8px 14px; border-radius: 8px; z-index: 10; }
.skip:focus { left: 12px; }

/* Header */
header .wrap { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; text-decoration: none; letter-spacing: -0.02em; }
.top-nav { margin-left: auto; display: flex; gap: 20px; font-size: 15px; color: var(--ink-2); align-items: center; }
.top-nav > a { text-decoration: none; }
.top-nav > a:hover { color: var(--ink); }
.langs { display: flex; gap: 2px; background: var(--panel); border: 1px solid var(--line); border-radius: 999px; padding: 3px; font-size: 13px; }
.langs a { padding: 3px 10px; border-radius: 999px; text-decoration: none; color: var(--ink-2); }
.langs a:hover { color: var(--ink); }
.langs [aria-current] { background: var(--raised); color: var(--ink); }
@media (max-width: 720px) { .top-nav .hide-sm { display: none; } }

/* Graph skeleton */
.graph { position: relative; padding-left: var(--rail); }
.rail { position: absolute; left: 0; top: 0; width: var(--rail); height: 100%; pointer-events: none; overflow: visible; }
.rail path { fill: none; stroke-width: 2.5; stroke-linecap: round; }
.rail .seg { transition: stroke-dashoffset 1.1s cubic-bezier(.3, .6, .2, 1); }
.rail circle { transition: fill .4s ease .5s; }
.node-row { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; min-height: 26px; margin-bottom: 14px; }
.chip { font-size: 12.5px; font-weight: 600; padding: 2px 9px; border-radius: 6px; line-height: 1.5; }
.chip.indigo { background: color-mix(in srgb, var(--indigo) 20%, transparent); color: var(--indigo); }
.chip.teal { background: color-mix(in srgb, var(--teal) 20%, transparent); color: var(--teal); }
.chip.ochre { background: color-mix(in srgb, var(--ochre) 20%, transparent); color: var(--ochre); }
.msg { font-size: 14px; color: var(--ink-3); }

.block { padding-block: 40px 88px; }
.block.branch { padding-left: 30px; }
@media (max-width: 720px) { .block { padding-block: 32px 64px; } .block.branch { padding-left: 18px; } }
h1 { font-size: clamp(38px, 5.6vw, 68px); line-height: 1.1; letter-spacing: -0.04em; margin: 0 0 22px; font-weight: 700; text-wrap: balance; max-width: 13em; }
:lang(ja) h1 { letter-spacing: -0.02em; font-size: clamp(34px, 5vw, 60px); }
h2 { font-size: clamp(26px, 3.4vw, 40px); line-height: 1.22; letter-spacing: -0.035em; margin: 0 0 14px; text-wrap: balance; }
:lang(ja) h2 { letter-spacing: -0.015em; }
.lede { color: var(--ink-2); font-size: 19px; max-width: 32em; margin: 0 0 30px; }
.copy { color: var(--ink-2); max-width: 30em; margin: 0; }
.cta { display: flex; flex-wrap: wrap; gap: 12px 18px; align-items: center; }
.btn { display: inline-flex; align-items: center; gap: 10px; background: var(--indigo); color: var(--on-indigo); text-decoration: none; font-weight: 600; padding: 13px 22px; border-radius: 10px; }
.btn:hover { filter: brightness(1.08); }
.btn svg { width: 18px; height: 18px; flex: none; }
.meta { font-size: 14px; color: var(--ink-3); line-height: 1.5; }

.window { border-radius: 12px; overflow: hidden; border: 1px solid var(--line); box-shadow: 0 30px 60px -30px rgba(0, 0, 0, .55); background: var(--panel); }
.window img { display: block; width: 100%; height: auto; }
.hero-shot { margin-top: 52px; }

.pair { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 44px; align-items: start; }
@media (max-width: 900px) { .pair { grid-template-columns: minmax(0, 1fr); gap: 26px; } }
.points { list-style: none; padding: 0; margin: 22px 0 0; display: grid; gap: 10px; }
.points li { color: var(--ink-2); font-size: 15.5px; padding-left: 16px; position: relative; }
.points li::before { content: ""; position: absolute; left: 0; top: 11px; width: 6px; height: 6px; border-radius: 50%; border: 1.5px solid var(--indigo); }

.cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 34px; margin-top: 26px; }
@media (max-width: 900px) { .cols { grid-template-columns: minmax(0, 1fr); gap: 22px; } }
.cols h3 { font-size: 17px; margin: 0 0 6px; letter-spacing: -0.02em; }
.cols p { margin: 0; color: var(--ink-2); font-size: 15.5px; }

.more { columns: 2 280px; column-gap: 40px; margin: 22px 0 0; padding: 0; list-style: none; }
.more li { break-inside: avoid; padding: 9px 0; border-bottom: 1px solid var(--line); color: var(--ink-2); font-size: 15.5px; }

.install { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 40px; margin-top: 24px; }
@media (max-width: 900px) { .install { grid-template-columns: minmax(0, 1fr); } }
.install ol { margin: 0; padding-left: 20px; color: var(--ink-2); display: grid; gap: 8px; }
.install ol a { color: var(--indigo); }
.install dl { margin: 0; display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 8px 22px; font-size: 15.5px; }
.install dt { color: var(--ink-3); }
.install dd { margin: 0; }

footer { border-top: 1px solid var(--line); padding-block: 28px 44px; font-size: 14px; color: var(--ink-3); }
footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 26px; align-items: center; }
footer .meaning { flex: 1 1 260px; }
footer .langs { margin-left: auto; }

/* 404 */
.lost { padding-block: 96px; }
.lost ul { list-style: none; padding: 0; display: flex; gap: 18px; flex-wrap: wrap; }
.lost a { color: var(--indigo); }

/* Reveal: only elements below the first screen wait, so the page is complete without scripts. */
.reveal { transition: opacity .7s ease, transform .7s ease; }
.reveal.wait { opacity: 0; transform: translateY(16px); }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .rail .seg, .rail circle { transition: none !important; }
  .reveal.wait { opacity: 1; transform: none; }
}