:root {
  --blue: #2d4ffb;
  --blue-hover: #4863ff;
  --bg: #0b0d14;
  --card: #141824;
  --line: #262c3d;
  --ink: #eef0f7;
  --muted: #9aa1b8;
  --danger: #e5484d;
  --ok: #3ccf91;
}
* { box-sizing: border-box; }
html { color-scheme: dark; }
body {
  margin: 0;
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
  min-height: 100vh;
}
[hidden] { display: none !important; }
a { color: #8da0ff; }
a:hover { color: #fff; }

.rtm-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 24px; border-bottom: 1px solid var(--line); }
.rtm-brand { font-weight: 700; font-size: 20px; letter-spacing: .02em; color: var(--ink); text-decoration: none; }
.rtm-brand span { color: var(--blue); }
.rtm-nav { display: flex; gap: 16px; font-size: 14px; }
.rtm-nav a { text-decoration: none; color: var(--muted); }
.rtm-nav a:hover { color: var(--ink); }

.rtm-wrap { max-width: 640px; margin: 0 auto; padding: 40px 16px 80px; }
.rtm-wrap.narrow { max-width: 440px; }
.rtm-card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 28px; margin-bottom: 20px; }
h1 { font-size: 28px; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 18px; margin: 0 0 8px; }
p { margin: 0 0 12px; }
.rtm-muted { color: var(--muted); }
.rtm-small { font-size: 13px; }

.rtm-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.rtm-field { margin-bottom: 14px; }
.rtm-field.full { grid-column: 1 / -1; }
label { display: block; margin-bottom: 6px; font-size: 14px; font-weight: 600; }
input[type=text], input[type=email], input[type=tel], select {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid #333a52;
  border-radius: 8px;
  background: #0e111b;
  color: var(--ink);
  font: inherit;
}
input[readonly] { color: var(--muted); background: #121623; }
input::placeholder { color: #5f6783; }
input:focus, select:focus, button:focus-visible, a:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
  border-color: var(--blue);
}
.rtm-btn {
  display: inline-block;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 12px 22px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  background: var(--blue);
  color: #fff;
  text-decoration: none;
}
.rtm-btn:hover { background: var(--blue-hover); color: #fff; }
.rtm-btn:disabled { opacity: .55; cursor: not-allowed; }
.rtm-btn.ghost { background: transparent; border-color: #3a4260; color: var(--ink); }
.rtm-btn.ghost:hover { background: #1b2030; }
.rtm-btn.danger { background: var(--danger); }
.rtm-btn.danger:hover { background: #f0575c; }
.rtm-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 6px; }

.rtm-msg { padding: 12px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 15px; border: 1px solid; }
.rtm-msg.ok { background: rgba(60, 207, 145, .1); border-color: rgba(60, 207, 145, .45); color: #b9f2d9; }
.rtm-msg.error { background: rgba(229, 72, 77, .12); border-color: rgba(229, 72, 77, .5); color: #ffc9cb; }

.rtm-danger-zone { border-color: #4a2430; }
.rtm-danger-zone summary { cursor: pointer; font-weight: 600; color: #ff9a9d; }
.rtm-danger-zone form { margin-top: 14px; }
.rtm-meta { display: flex; flex-wrap: wrap; gap: 6px 20px; margin-bottom: 18px; }

@media (max-width: 560px) {
  .rtm-grid { grid-template-columns: 1fr; }
  .rtm-card { padding: 20px; }
  h1 { font-size: 24px; }
}