:root {
  color-scheme: light;
  --plane: #f9f9f7; --surface: #fcfcfb;
  --ink: #0b0b0b; --ink-2: #52514e; --muted: #898781;
  --grid: #e1e0d9; --axis: #c3c2b7; --border: rgba(11,11,11,0.10);
  --lane-1: #2a78d6; --lane-2: #eb6834; --lane-3: #1baf7a;
  --accent: #9a6b1f; --milestone: #4a3aa7;
}
@media (prefers-color-scheme: dark) {
  :root:where(:not([data-theme="light"])) {
    color-scheme: dark;
    --plane: #0d0d0d; --surface: #1a1a19;
    --ink: #ffffff; --ink-2: #c3c2b7; --muted: #898781;
    --grid: #2c2c2a; --axis: #383835; --border: rgba(255,255,255,0.10);
    --lane-1: #3987e5; --lane-2: #d95926; --lane-3: #199e70;
    --accent: #d4a24a; --milestone: #9085e9;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --plane: #0d0d0d; --surface: #1a1a19;
  --ink: #ffffff; --ink-2: #c3c2b7; --muted: #898781;
  --grid: #2c2c2a; --axis: #383835; --border: rgba(255,255,255,0.10);
  --lane-1: #3987e5; --lane-2: #d95926; --lane-3: #199e70;
  --accent: #d4a24a; --milestone: #9085e9;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--plane); color: var(--ink); font: 16px/1.55 system-ui, -apple-system, "Segoe UI", sans-serif; }
a { color: inherit; }
h1, h2 { margin: 0 0 .4em; line-height: 1.15; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.6rem, 3.2vw, 2.4rem); max-width: 22ch; }
h2 { font-size: 1.25rem; }
p { margin: 0 0 .8em; }
.eyebrow { color: var(--accent); font-size: .78rem; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; margin-bottom: .6em; }
.lede { color: var(--ink-2); max-width: 60ch; font-size: 1.05rem; }
.meta, .hint { color: var(--muted); font-size: .9rem; max-width: 70ch; }
.site-header { display: flex; align-items: center; justify-content: space-between; padding: 18px 24px; border-bottom: 1px solid var(--border); background: var(--surface); position: sticky; top: 0; z-index: 5; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.monogram { width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center; background: var(--accent); color: #fff; font-weight: 700; font-size: 1.1rem; }
.brand-text { display: flex; flex-direction: column; font-weight: 600; line-height: 1.1; letter-spacing: .04em; text-transform: uppercase; font-size: .85rem; }
.brand-text small { font-weight: 400; text-transform: none; letter-spacing: 0; color: var(--muted); font-size: .78rem; margin-top: 3px; }
.theme-toggle { font: inherit; font-size: .85rem; color: var(--ink-2); background: transparent; border: 1px solid var(--border); border-radius: 999px; padding: 6px 14px; cursor: pointer; }
.theme-toggle:hover { border-color: var(--axis); }
main { max-width: 1120px; margin: 0 auto; padding: 40px 24px 60px; display: grid; gap: 44px; }
main > section { min-width: 0; }
.chart-wrap { max-width: 100%; }
section > h2 { margin-bottom: 14px; }
.section-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 12px; }
.milestone-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 12px; }
.milestone { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; display: grid; gap: 4px; position: relative; }
.milestone .version { font-size: .78rem; font-weight: 700; letter-spacing: .06em; color: var(--ink-2); display: flex; align-items: center; gap: 8px; }
.milestone .version::before { content: ""; width: 9px; height: 9px; background: var(--milestone); transform: rotate(45deg); border-radius: 1px; }
.milestone .name { font-weight: 600; line-height: 1.25; }
.milestone .when { color: var(--muted); font-size: .85rem; font-variant-numeric: tabular-nums; }
.milestone.major { border-color: var(--milestone); }
.legend { display: flex; flex-wrap: wrap; gap: 12px 14px; font-size: .85rem; color: var(--ink-2); align-items: center; }
.legend > span { display: inline-flex; align-items: center; gap: 7px; }
.legend i { width: 14px; height: 10px; border-radius: 3px; display: inline-block; }
.milestone { text-decoration: none; }
.milestone .progress { height: 5px; border-radius: 999px; background: var(--grid); overflow: hidden; margin-top: 4px; }
.milestone .progress span { display: block; height: 100%; background: var(--milestone); border-radius: inherit; }
.milestone.reached .version::before { background: var(--lane-3); }
.milestone.reached .progress span { background: var(--lane-3); }
.milestone:hover { border-color: var(--axis); }
.version-list { display: grid; gap: 16px; }
.version-block { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px 12px; }
.version-block header { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.version-block h3 { margin: 0; font-size: 1.05rem; }
.version-tag { display: inline-block; font-size: .72rem; font-weight: 700; letter-spacing: .06em; color: var(--milestone); border: 1px solid var(--milestone); border-radius: 999px; padding: 2px 8px; white-space: nowrap; }
.version-tag.small { font-size: .66rem; padding: 1px 6px; color: var(--ink-2); border-color: var(--axis); }
.steps { list-style: none; margin: 0; padding: 0; }
.step { display: grid; grid-template-columns: 2ch auto 1fr auto; align-items: center; gap: 10px; padding: 9px 0 9px 10px; border-top: 1px solid var(--grid); border-left: 3px solid var(--lane); }
.step .num { color: var(--muted); font-size: .8rem; font-variant-numeric: tabular-nums; text-align: right; }
.step .work { line-height: 1.35; }
.step.status-done .work { color: var(--muted); text-decoration: line-through; text-decoration-color: var(--axis); }
.lane-chip { display: inline-flex; align-items: center; gap: 6px; font-size: .74rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-2); white-space: nowrap; }
.lane-chip i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }
.status { display: inline-block; font-size: .72rem; font-weight: 600; border-radius: 999px; padding: 2px 9px; white-space: nowrap; border: 1px solid transparent; }
.status-not-started > .status, .status.status-not-started { color: var(--muted); border-color: var(--axis); }
.status-in-progress > .status, .status.status-in-progress { color: var(--accent); border-color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); }
.status-done > .status, .status.status-done { color: #fff; background: var(--lane-3); border-color: var(--lane-3); }
@media (max-width: 640px) {
  .step { grid-template-columns: 2ch 1fr auto; }
  .step .lane-chip { grid-column: 2; }
  .step .work { grid-column: 2 / span 2; }
  .step .status { grid-column: 3; grid-row: 1; }
}
.lane-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 14px; }
.lane-card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px; }
.lane-card h3 { margin: 0 0 10px; font-size: 1rem; display: flex; align-items: center; gap: 8px; }
.lane-card h3 i { width: 12px; height: 12px; border-radius: 3px; display: inline-block; }
.lane-card table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.lane-card td { padding: 7px 0; border-top: 1px solid var(--grid); vertical-align: top; }
.lane-card td:first-child { width: 1%; padding-right: 10px; white-space: nowrap; }
.lane-card td:last-child { text-align: right; white-space: nowrap; padding-left: 12px; }
.later-list, .decision-list { margin: 0; padding-left: 1.4em; display: grid; gap: 8px; max-width: 70ch; }
.later-list .version { font-weight: 700; color: var(--ink-2); margin-right: 8px; font-size: .85rem; }
.site-footer { text-align: center; color: var(--muted); font-size: .8rem; padding: 20px 24px 40px; }
@media (max-width: 640px) {
  .site-header { padding: 12px 16px; }
  main { padding: 28px 16px 48px; gap: 36px; }
  .lede { font-size: 1rem; }
}
@media print { .site-header, .theme-toggle { position: static; } }