/* Versmis — company site. Terminal / CLI design system. */
:root {
  --bg: #f6f7f9; --surface: #ffffff; --surface-2: #eef1f4;
  --ink: #16181d; --muted: #5b6270; --line: #e1e5ea;
  --accent: #2f54d6; --accent-ink: #ffffff;
  --accent-soft: color-mix(in srgb, var(--accent) 11%, var(--surface));
  --accent-line: color-mix(in srgb, var(--accent) 34%, var(--line));
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  --shadow: 0 1px 2px rgba(16,18,24,.05), 0 16px 38px -18px rgba(16,18,24,.20);
  --maxw: 780px;
}
@media (prefers-color-scheme: dark) {
  :root { --bg:#0c0e12; --surface:#14171d; --surface-2:#1b1f27; --ink:#eceef2; --muted:#98a0af; --line:#242a33; --accent:#8098f5; --accent-ink:#0d0f13; --shadow:0 1px 2px rgba(0,0,0,.4),0 22px 46px -20px rgba(0,0,0,.7); }
}
:root[data-theme="light"] { --bg:#f6f7f9; --surface:#ffffff; --surface-2:#eef1f4; --ink:#16181d; --muted:#5b6270; --line:#e1e5ea; --accent:#2f54d6; --accent-ink:#ffffff; --shadow:0 1px 2px rgba(16,18,24,.05),0 16px 38px -18px rgba(16,18,24,.20); }
:root[data-theme="dark"]  { --bg:#0c0e12; --surface:#14171d; --surface-2:#1b1f27; --ink:#eceef2; --muted:#98a0af; --line:#242a33; --accent:#8098f5; --accent-ink:#0d0f13; --shadow:0 1px 2px rgba(0,0,0,.4),0 22px 46px -20px rgba(0,0,0,.7); }

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; line-height: 1.6; transition: background .25s, color .25s; display: flex; flex-direction: column; min-height: 100dvh; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }
a { color: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }

/* ---- top nav ---- */
header.nav { position: sticky; top: 0; z-index: 50; display: flex; align-items: center; gap: 18px; flex-wrap: wrap; padding: 12px clamp(16px,5vw,44px); background: color-mix(in srgb, var(--bg) 85%, transparent); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.brand { font-family: var(--mono); font-weight: 700; font-size: 15px; letter-spacing: -.01em; text-decoration: none; color: var(--ink); }
.brand::before { content: "\25B9 "; color: var(--accent); }
nav.links { display: flex; gap: 4px; margin-left: 6px; flex-wrap: wrap; }
nav.links a { font-family: var(--mono); font-size: 13px; color: var(--muted); text-decoration: none; padding: 5px 10px; border-radius: 6px; }
nav.links a:hover { color: var(--ink); background: var(--surface-2); }
nav.links a[aria-current="page"] { color: var(--accent); background: var(--accent-soft); }
.tools { margin-left: auto; display: inline-flex; align-items: center; gap: 10px; }
.theme-btn { font-family: var(--mono); display: inline-flex; align-items: center; gap: 6px; cursor: pointer; border: 1px solid var(--line); background: var(--surface); color: var(--ink); border-radius: 999px; padding: 5px 11px; font-size: 12px; }
.theme-btn:hover { border-color: var(--accent); }

/* ---- page shell ---- */
main { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: clamp(30px,6vw,72px) clamp(16px,5vw,44px) 40px; flex: 1 0 auto; }

.cmd { font-family: var(--mono); font-size: 13px; color: var(--muted); margin-bottom: 26px; }
.cmd .p { color: var(--accent); }
.cmd .k { color: var(--ink); }

h1.title { font-size: clamp(30px,6vw,54px); line-height: 1.04; letter-spacing: -.035em; font-weight: 800; margin: 0 0 18px; text-wrap: balance; max-width: 16ch; }
.sub { font-family: var(--mono); font-size: 14px; color: var(--muted); line-height: 1.8; max-width: 64ch; margin: 0 0 34px; }
h2.sec { font-size: 21px; letter-spacing: -.02em; margin: 40px 0 12px; }
p.body { max-width: 65ch; margin: 0 0 16px; color: var(--ink); }
p.body.muted { color: var(--muted); }

.tag { display: inline-block; font-family: var(--mono); font-size: 11px; color: var(--accent); border: 1px solid var(--accent-line); background: var(--accent-soft); padding: 3px 9px; border-radius: 4px; margin-bottom: 22px; letter-spacing: .04em; }

/* terminal block */
.term { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; box-shadow: var(--shadow); }
.term .bar { display: flex; align-items: center; gap: 7px; padding: 9px 13px; background: var(--surface-2); border-bottom: 1px solid var(--line); font-family: var(--mono); font-size: 12px; color: var(--muted); }
.term .bar .d { width: 10px; height: 10px; border-radius: 50%; background: var(--line); }
.term .bar .ttl { margin-left: 8px; }
.term .body { padding: 18px 16px; font-family: var(--mono); font-size: 13.5px; line-height: 1.9; background: var(--surface); overflow-x: auto; }
.term .l { white-space: pre-wrap; }
.term .p { color: var(--accent); }
.term .o { color: var(--muted); }
.term .k { color: var(--ink); }
.cur { display: inline-block; width: 8px; height: 15px; background: var(--accent); vertical-align: -2px; animation: blink 1.1s steps(2,start) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* principle list */
.plist { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 2px; }
.plist li { font-family: var(--mono); font-size: 13.5px; color: var(--muted); padding: 12px 0; border-top: 1px solid var(--line); display: flex; gap: 12px; }
.plist li b { color: var(--ink); font-weight: 700; width: 28ch; flex-shrink: 0; }
.plist li:last-child { border-bottom: 1px solid var(--line); }

/* app card */
.appcard { border: 1px solid var(--line); border-radius: 12px; padding: 22px; margin-top: 6px; background: var(--surface); }
.appcard h3 { margin: 0 0 6px; font-size: 20px; letter-spacing: -.01em; }
.appcard p { margin: 0 0 14px; color: var(--muted); font-size: 14.5px; max-width: 52ch; }
.appcard .meta { font-family: var(--mono); font-size: 12px; color: var(--accent); }
.btn { display: inline-block; font-family: var(--mono); background: var(--accent); color: var(--accent-ink); font-weight: 600; font-size: 13px; text-decoration: none; padding: 9px 18px; border-radius: 8px; }
.btn:hover { filter: brightness(1.06); }

/* key-value / contact / legal */
.kv { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; margin: 6px 0 8px; }
.kv .r { display: grid; grid-template-columns: 160px 1fr; font-family: var(--mono); font-size: 13px; border-bottom: 1px solid var(--line); }
.kv .r:last-child { border-bottom: none; }
.kv .r .k { padding: 11px 14px; background: var(--surface-2); color: var(--muted); border-right: 1px solid var(--line); letter-spacing: .03em; }
.kv .r .v { padding: 11px 14px; color: var(--ink); }
.kv .r .v a { text-decoration: none; }

/* doc prose */
.doc h2 { font-size: 17px; margin: 28px 0 8px; letter-spacing: -.01em; }
.doc p, .doc li { font-size: 14.5px; color: var(--ink); max-width: 66ch; }
.doc ul { padding-left: 18px; }
.doc .upd { font-family: var(--mono); font-size: 12px; color: var(--muted); margin-top: 4px; margin-bottom: 4px; }

footer.foot { border-top: 1px solid var(--line); margin-top: 46px; flex-shrink: 0; }
footer.foot .in { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 24px clamp(16px,5vw,44px) 48px; }
footer.foot .cols { display: flex; gap: 30px; flex-wrap: wrap; margin-bottom: 20px; }
footer.foot .cols a { font-family: var(--mono); font-size: 12.5px; color: var(--muted); text-decoration: none; }
footer.foot .cols a:hover { color: var(--accent); }
footer.foot .legal { font-family: var(--mono); font-size: 11.5px; color: var(--muted); line-height: 1.8; max-width: 78ch; }

@media (max-width: 560px) {
  .kv .r { grid-template-columns: 120px 1fr; }
  .plist li { flex-direction: column; gap: 2px; }
  .plist li b { width: auto; }
  /* Nav: brand + theme toggle share the top row; links drop to their own row below. */
  header.nav { gap: 12px 14px; }
  .tools { order: 2; }
  nav.links { order: 3; flex-basis: 100%; margin-left: 0; }
}