:root { --bg: #0f1115; --card: #171a21; --line: #2a2f3a; --text: #e6e8ee; --dim: #9aa3b2; --accent: #7aa2ff; --bad: #ff7a7a; --good: #7adca0; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif; }
header { display: flex; justify-content: space-between; align-items: center; padding: 12px 20px; border-bottom: 1px solid var(--line); }
header nav { display: flex; gap: 14px; align-items: center; }
a { color: var(--accent); text-decoration: none; }
a.on { font-weight: 600; text-decoration: underline; }
.brand { font-weight: 600; letter-spacing: .02em; }
main { max-width: 980px; margin: 24px auto; padding: 0 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 18px 20px; margin-bottom: 18px; }
.card.narrow { max-width: 440px; margin-left: auto; margin-right: auto; }
.card.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; }
h1 { font-size: 22px; margin: 0 0 8px; } h2 { font-size: 18px; margin: 0 0 8px; } h3 { font-size: 15px; margin: 8px 0; }
label { display: block; margin: 10px 0; color: var(--dim); font-size: 13px; }
input, select { display: block; width: 100%; margin-top: 4px; padding: 9px 10px; background: var(--bg); color: var(--text); border: 1px solid var(--line); border-radius: 7px; font: inherit; }
button { margin-top: 8px; padding: 9px 14px; background: var(--accent); color: #0b0d12; border: 0; border-radius: 7px; font: inherit; font-weight: 600; cursor: pointer; }
button.small { padding: 4px 8px; font-size: 12px; margin: 0; }
button.link { background: none; color: var(--accent); padding: 0; margin: 0; font-weight: 400; }
form.inline { display: inline; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
tr.off td { color: var(--dim); }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; }
pre.select { user-select: all; white-space: pre-wrap; word-break: break-all; background: var(--bg); border: 1px solid var(--line); border-radius: 7px; padding: 10px; }
.hint { color: var(--dim); font-size: 13px; }
.error { color: var(--bad); } .ok { color: var(--good); }
.big { font-size: 18px; }