:root {
  --bg: #f1f4f8; --surface: #ffffff; --ink: #15202e; --muted: #5d6b7c; --line: #dbe1e8;
  --field: #ffffff; --ro: #f4f6f9; --accent: #1d5fd1; --accent-ink: #ffffff;
  --ok: #17794a; --ok-bg: #e5f4ec; --err: #b42318; --err-bg: #fdecea;
  --font: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e141c; --surface: #161e29; --ink: #e7edf4; --muted: #93a1b3; --line: #2a3544;
    --field: #111821; --ro: #1b2431; --accent: #6aa2ff; --accent-ink: #071a3a;
    --ok: #5fd19a; --ok-bg: #143326; --err: #ff8a80; --err-bg: #3a1714;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--font); font-size: 15px; line-height: 1.5; }
.wrap { max-width: 900px; margin: 0 auto; padding-left: 16px; padding-right: 16px; }

header { background: var(--surface); border-bottom: 1px solid var(--line); }
header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-block: 14px; flex-wrap: wrap; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.05rem; }
.logo small { display: block; font-weight: 400; font-size: .78rem; color: var(--muted); }
.mark { width: 36px; height: 36px; border-radius: 8px; background: var(--accent); color: var(--accent-ink); display: grid; place-items: center; font-size: .85rem; }
.user { display: flex; align-items: center; gap: 10px; font-weight: 600; margin: 0; }
.av { width: 34px; height: 34px; border-radius: 50%; background: var(--ink); color: var(--surface); display: grid; place-items: center; font-size: .78rem; }
.lnk { background: none; border: 1px solid var(--line); color: var(--ink); border-radius: 6px; padding: 6px 12px; font: inherit; font-weight: 600; cursor: pointer; }

main { padding-block: 28px 110px; }
.page, .stack { display: grid; gap: 20px; }
h1 { font-size: 1.6rem; margin: 0; }
.lead { color: var(--muted); margin: 4px 0 0; max-width: 65ch; }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; }
.card .hd { padding: 18px 22px; border-bottom: 1px solid var(--line); }
.card h2 { font-size: 1.02rem; margin: 0; }
.card .hd p { margin: 2px 0 0; color: var(--muted); font-size: .88rem; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 20px; padding: 20px 22px; }
@media (max-width: 600px) { .grid { grid-template-columns: 1fr; } }

label { display: block; font-size: .85rem; font-weight: 600; color: var(--muted); margin-bottom: 5px; }
.req { color: var(--err); }
input, select { width: 100%; padding: 11px 13px; border: 1px solid var(--line); border-radius: 7px; background: var(--field); color: var(--ink); font: inherit; }
input:focus, select:focus, button:focus-visible, a:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
input[readonly] { background: var(--ro); color: var(--muted); }
.input-validation-error { border-color: var(--err); }
.note { font-size: .78rem; color: var(--muted); margin-top: 4px; }
.errmsg { display: block; font-size: .8rem; color: var(--err); margin-top: 4px; }
.errmsg:empty { display: none; }

.alert { border-radius: 8px; padding: 10px 14px; font-weight: 600; font-size: .9rem; }
.alert.ok { background: var(--ok-bg); color: var(--ok); }
.alert.err { background: var(--err-bg); color: var(--err); }

.btn { display: inline-block; background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 7px; padding: 11px 22px; font: inherit; font-weight: 700; cursor: pointer; text-decoration: none; }
.bar { position: fixed; left: 0; right: 0; bottom: 0; background: var(--surface); border-top: 1px solid var(--line); }
.bar .wrap { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding-block: 12px; flex-wrap: wrap; }
.status { font-size: .88rem; color: var(--muted); }

.login { max-width: 400px; margin: 40px auto; padding: 30px 26px; }
.login h1 { font-size: 1.4rem; }
.login form { display: grid; gap: 14px; margin-top: 20px; }