/* Nutech Hub — design system (2026-06-12 polish pass)
   Dark, quiet, professional. System fonts, zero external deps. */

:root {
  --bg: #0a0f1c;
  --bg-raise: #0d1322;
  --panel: #111828;
  --panel-2: #0d1424;
  --border: #1d2740;
  --border-strong: #2a3759;
  --text: #e6ecf7;
  --text-2: #b6c2da;
  --muted: #8593b0;
  --faint: #5d6b8a;
  --accent: #4f8df9;
  --ok: #34d399;
  --warn: #fbbf24;
  --err: #f87171;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow-hover: 0 2px 4px rgba(0, 0, 0, .35), 0 12px 32px -16px rgba(0, 0, 0, .6);
  --focus-ring: 0 0 0 3px rgba(79, 141, 249, .28);
}

* { box-sizing: border-box; }
::selection { background: rgba(79, 141, 249, .35); }

html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  background-image: radial-gradient(1200px 500px at 50% -200px, rgba(79, 141, 249, .07), transparent);
  background-repeat: no-repeat;
  color: var(--text);
  font: 14.5px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main { max-width: 1100px; margin: 0 auto; padding: 28px 24px 96px; }

h1 { font-size: 21px; font-weight: 650; letter-spacing: -.01em; margin: 4px 0; }
h2 { font-size: 15px; font-weight: 650; letter-spacing: -.005em; margin: 0 0 12px; color: var(--text-2); }

a { color: #82aefb; text-decoration: none; }
a:hover { color: #a8c6fc; }

.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); }
.faint { color: var(--faint); }
.small { font-size: 12.5px; }
.spacer { flex: 1; }
.inline { display: inline; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 4px;
  padding: 0 24px; height: 54px;
  background: rgba(10, 15, 28, .82);
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.brand {
  display: flex; align-items: center; gap: 9px;
  font-weight: 700; font-size: 14.5px; letter-spacing: -.01em; color: var(--text);
  margin-right: 20px; white-space: nowrap;
}
.brand .mark {
  width: 24px; height: 24px; border-radius: 7px; flex: none;
  display: grid; place-items: center;
  background: linear-gradient(135deg, #4f8df9, #2563eb);
  color: #fff; font-size: 12px; font-weight: 700;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .22);
}
.brand.big { font-size: 19px; justify-content: center; }
.brand.big .mark { width: 34px; height: 34px; border-radius: 10px; font-size: 16px; }

.topbar .nav-link {
  color: var(--muted); font-size: 13.5px; font-weight: 550;
  padding: 6px 11px; border-radius: 8px; line-height: 1;
}
.topbar .nav-link:hover { color: var(--text); background: rgba(134, 150, 179, .1); }
.topbar .nav-link.active { color: var(--text); background: rgba(79, 141, 249, .14); }
.topbar .who { color: var(--faint); font-size: 12.5px; margin: 0 10px 0 16px; }

/* ---------- cards & grids ---------- */
.card {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  margin: 14px 0;
}
.card.danger { border-color: rgba(248, 113, 113, .25); }
.card-title { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; font-size: 14.5px; }
.card-title b { font-weight: 650; letter-spacing: -.005em; }

.grid { display: grid; gap: 14px; }
.grid.droplets { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
.grid.tiles { grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); margin-top: 18px; }

.page-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 6px; }
.section-label {
  font-size: 11px; font-weight: 650; letter-spacing: .09em; text-transform: uppercase;
  color: var(--faint); margin: 30px 0 10px;
}

/* ---------- launcher tiles ---------- */
.tile {
  position: relative; display: flex; flex-direction: column;
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 18px 18px 14px; color: var(--text); overflow: hidden;
  transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}
.tile::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 2px;
  background: var(--accent); opacity: .9;
}
.tile:hover { transform: translateY(-2px); border-color: var(--border-strong); box-shadow: var(--shadow-hover); color: var(--text); }
.tile:focus-visible { outline: none; box-shadow: var(--focus-ring); }

.tile-head { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.tile-mono {
  width: 38px; height: 38px; border-radius: 10px; flex: none;
  display: grid; place-items: center;
  font-size: 14px; font-weight: 700; color: #fff;
  background: var(--accent); /* fallback when color-mix unsupported */
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 60%, #000));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .18);
}
.tile-name { font-weight: 650; font-size: 15px; letter-spacing: -.005em; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.tile p {
  margin: 2px 0 12px; color: var(--muted); font-size: 13px; line-height: 1.5;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  min-height: 2.6em;
}
.tile-foot { margin-top: auto; display: flex; align-items: center; justify-content: space-between; }
.tile .open { color: var(--accent); font-size: 13px; font-weight: 550; }

/* ---------- chips, dots, meters ---------- */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 2px 9px; border-radius: 999px;
  font-size: 11.5px; font-weight: 550; letter-spacing: .01em; line-height: 1.5;
  background: rgba(134, 150, 179, .1); border: 1px solid var(--border); color: var(--text-2);
  white-space: nowrap;
}
.chip::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--faint); flex: none; }
.chip.ok    { color: #7ee8c0; border-color: rgba(52, 211, 153, .25); background: rgba(52, 211, 153, .08); }
.chip.ok::before { background: var(--ok); }
.chip.warn  { color: #fcd97e; border-color: rgba(251, 191, 36, .25); background: rgba(251, 191, 36, .07); }
.chip.warn::before { background: var(--warn); }
.chip.err   { color: #fda4a4; border-color: rgba(248, 113, 113, .28); background: rgba(248, 113, 113, .08); }
.chip.err::before { background: var(--err); }
.chip.plain::before { display: none; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0 4px; }

.meter-row { display: flex; justify-content: space-between; align-items: baseline; font-size: 12px; color: var(--muted); margin-top: 9px; }
.meter-row b { color: var(--text-2); font-weight: 550; }
.bar { height: 5px; border-radius: 3px; background: rgba(134, 150, 179, .14); overflow: hidden; margin-top: 5px; }
.bar i { display: block; height: 100%; border-radius: 3px; background: var(--accent); transition: width .3s ease; }
.bar.ok i { background: var(--ok); }
.bar.warn i { background: var(--warn); }
.bar.err i { background: var(--err); }

.mini-link { font-size: 12px; margin-left: auto; color: var(--faint); }
.mini-link:hover { color: var(--accent); }

/* ---------- ops: project cards ---------- */
.project { padding: 18px 20px 14px; }
.project .accent-dot { width: 9px; height: 9px; border-radius: 3px; background: var(--accent); flex: none; }
.links { display: flex; gap: 4px 18px; flex-wrap: wrap; margin: 8px 0 2px; font-size: 13px; }
.links a { color: var(--text-2); font-weight: 500; }
.links a:hover { color: var(--accent); }
.deployline { color: var(--faint); margin: 8px 0 2px; font-size: 12px; word-break: break-word; }

details { margin: 10px 0 2px; border-top: 1px solid var(--border); padding-top: 10px; }
summary {
  cursor: pointer; color: var(--text-2); font-weight: 550; font-size: 13px;
  list-style: none; display: flex; align-items: center; gap: 7px; user-select: none;
}
summary::-webkit-details-marker { display: none; }
summary::before {
  content: ""; width: 7px; height: 7px; flex: none;
  border-right: 1.5px solid var(--faint); border-bottom: 1.5px solid var(--faint);
  transform: rotate(-45deg); transition: transform .15s ease; margin-top: -2px;
}
details[open] > summary::before { transform: rotate(45deg); margin-top: -4px; }
summary:hover { color: var(--text); }

.mdbox {
  background: var(--bg-raise); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 6px 18px; margin-top: 10px; font-size: 13.5px; color: var(--text-2);
}
.mdbox h1, .mdbox h2, .mdbox h3 { font-size: 13.5px; color: var(--text); margin: 14px 0 4px; }
.mdbox p, .mdbox li { line-height: 1.55; }
.mdbox ul { padding-left: 20px; }
.mdbox code { background: rgba(134, 150, 179, .14); padding: 1px 5px; border-radius: 4px; font-size: 12px; font-family: ui-monospace, Menlo, monospace; }
.mdbox pre { background: rgba(134, 150, 179, .1); border-radius: 8px; padding: 10px 12px; overflow-x: auto; }
.mdbox pre code { background: none; padding: 0; }
.mdbox table { border-collapse: collapse; display: block; overflow-x: auto; }
.mdbox td, .mdbox th { border: 1px solid var(--border); padding: 4px 9px; font-size: 12.5px; }
.mdbox em { color: var(--muted); }

/* ---------- forms ---------- */
form label { display: inline-flex; flex-direction: column; gap: 5px; font-size: 12px; font-weight: 550; color: var(--muted); margin: 6px 0; }
.row-form { display: flex; gap: 14px; flex-wrap: wrap; align-items: flex-end; }
.row-form .grow, label.grow { flex: 1; min-width: 220px; }
label.grow { display: flex; flex-direction: column; }

input[type=text], input[type=email], input[type=password], select, input:not([type]) {
  height: 36px;
  background: var(--bg-raise); border: 1px solid var(--border); color: var(--text);
  border-radius: 8px; padding: 0 11px; font-size: 13.5px; width: 100%;
  font-family: inherit;
  transition: border-color .12s ease, box-shadow .12s ease;
}
input::placeholder { color: var(--faint); }
input:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: var(--focus-ring); }
input.ro { opacity: .55; }
select { appearance: none; -webkit-appearance: none; padding-right: 28px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%238593b0' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center;
}
label.check { flex-direction: row; align-items: center; gap: 8px; font-weight: 500; color: var(--text-2); }
input[type=checkbox] { width: 15px; height: 15px; accent-color: var(--accent); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  height: 34px; padding: 0 15px;
  background: rgba(134, 150, 179, .1); color: var(--text);
  border: 1px solid var(--border-strong); border-radius: 8px;
  font-size: 13px; font-weight: 550; font-family: inherit; letter-spacing: .005em;
  white-space: nowrap;
  cursor: pointer; transition: background .12s ease, border-color .12s ease, transform .05s ease;
}
.btn:hover { background: rgba(134, 150, 179, .16); }
.btn:active { transform: translateY(1px); }
.btn:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.btn.primary {
  background: linear-gradient(180deg, #4f8df9, #2f6ae8); border-color: #2f6ae8; color: #fff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .18);
}
.btn.primary:hover { background: linear-gradient(180deg, #5b96fa, #3a74ed); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--muted); }
.btn.ghost:hover { color: var(--text); background: rgba(134, 150, 179, .1); }
.btn.err { background: rgba(248, 113, 113, .1); border-color: rgba(248, 113, 113, .3); color: #fda4a4; }
.btn.err:hover { background: rgba(248, 113, 113, .18); }
.btn.mini { height: 28px; padding: 0 11px; font-size: 12px; }
.btn.wide { width: 100%; margin-top: 14px; height: 38px; font-size: 14px; }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; margin: 0 -20px; padding: 0 20px; }
table { width: 100%; border-collapse: collapse; }
th {
  text-align: left; color: var(--faint); font-size: 11px; font-weight: 650;
  letter-spacing: .07em; text-transform: uppercase; padding: 8px 10px;
  border-bottom: 1px solid var(--border-strong);
}
td { padding: 10px; border-bottom: 1px solid var(--border); font-size: 13.5px; }
tr:last-child td { border-bottom: 0; }
tbody tr, table tr { transition: background .1s ease; }
table tr:hover td { background: rgba(134, 150, 179, .04); }
td .small { display: block; margin-top: 1px; }

/* ---------- login ---------- */
.login-wrap { display: flex; justify-content: center; padding-top: 11vh; }
.login-card { width: 380px; padding: 30px 30px 26px; }
.login-card form { display: flex; flex-direction: column; gap: 4px; margin-top: 18px; }
.login-card .sub { text-align: center; margin: 8px 0 0; }

/* ---------- flash ---------- */
.flash {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px; border-radius: var(--radius); margin: 12px 0; font-size: 13.5px;
  border: 1px solid var(--border);
}
.flash.ok { background: rgba(52, 211, 153, .07); border-color: rgba(52, 211, 153, .25); color: #7ee8c0; }
.flash.error { background: rgba(248, 113, 113, .08); border-color: rgba(248, 113, 113, .28); color: #fda4a4; }

/* ---------- misc ---------- */
.asof { color: var(--faint); font-size: 11.5px; margin-top: 12px; }
hr.sep { border: 0; border-top: 1px solid var(--border); margin: 14px 0; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: #243150; border-radius: 6px; border: 2px solid var(--bg); }
::-webkit-scrollbar-track { background: transparent; }

@media (max-width: 640px) {
  main { padding: 18px 14px 80px; }
  .topbar { padding: 0 14px; }
  .topbar .who { display: none; }
  .page-head { flex-wrap: wrap; }
}