:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --ink: #15171a;
  --muted: #646b75;
  --line: #e2e5ea;
  --field: #f8f9fb;
  --accent: #2f5bea;
  --accent-ink: #ffffff;
  --danger: #c4372f;
  --ok: #1f8a4c;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 8px 24px rgba(16, 24, 40, .06);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1114; --panel: #171a1f; --ink: #e8eaed; --muted: #9aa1ab; --line: #2a2f37;
    --field: #1d2127; --accent: #5b7cff; --accent-ink: #fff; --danger: #ff6b61; --ok: #4cc27f;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.25);
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--ink);
  font: 14px/1.5 ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
button, input, select, textarea { font: inherit; color: inherit; }
label { display: block; font-size: 12.5px; font-weight: 550; color: var(--muted); margin: 0 0 6px; }
input[type=text], input[type=url], input[type=email], input[type=tel], input[type=password], input[type=number], select, textarea {
  width: 100%; padding: 9px 11px; border: 1px solid var(--line); background: var(--field);
  border-radius: 8px; outline: none; transition: border-color .15s, box-shadow .15s;
}
textarea { resize: vertical; min-height: 84px; }
input:focus, select:focus, textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent); }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 9px 14px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel);
  cursor: pointer; font-weight: 550; transition: background .15s, border-color .15s, opacity .15s; white-space: nowrap;
}
.btn:hover { border-color: color-mix(in srgb, var(--ink) 25%, var(--line)); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { opacity: .92; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn svg { width: 16px; height: 16px; flex: none; }

/* ---------- login ---------- */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card {
  width: 100%; max-width: 360px; background: var(--panel); border: 1px solid var(--line);
  border-radius: 14px; padding: 28px; box-shadow: var(--shadow);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 650; font-size: 15px; }
.brand-mark { width: 28px; height: 28px; flex: none; }
.login-card h1 { font-size: 20px; margin: 22px 0 4px; letter-spacing: -.01em; }
.login-card p.sub { color: var(--muted); margin: 0 0 20px; }
.login-card .btn { width: 100%; margin-top: 14px; padding: 10px; }
.err { color: var(--danger); font-size: 13px; margin-top: 10px; min-height: 1em; }

[hidden] { display: none !important; }