:root {
  color-scheme: dark;
  --bg: #05070c;
  --panel: rgba(8, 16, 24, 0.88);
  --cyan: #18d8ff;
  --cyan-soft: rgba(24, 216, 255, 0.18);
  --text: #e7fbff;
  --muted: #7b9aaa;
  --danger: #ff3f5f;
  --warn: #f5c84b;
  --ok: #4cff9a;
}

* {
  box-sizing: border-box;
  user-select: none;
  -webkit-user-select: none;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(rgba(24, 216, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(24, 216, 255, 0.035) 1px, transparent 1px),
    radial-gradient(circle at center, #08111c 0%, var(--bg) 68%);
  background-size: 34px 34px, 34px 34px, auto;
  color: var(--text);
  font-family: Consolas, "Courier New", monospace;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.rv-shell {
  width: min(1180px, calc(100vw - 32px));
  min-height: calc(100vh - 56px);
  margin: 0 auto;
  padding: 40px 0 88px;
  display: grid;
  gap: 18px;
  align-content: center;
}

.rv-card {
  border: 1px solid var(--cyan-soft);
  background: var(--panel);
  box-shadow: 0 0 26px rgba(24, 216, 255, 0.12), inset 0 0 24px rgba(24, 216, 255, 0.04);
  padding: 24px;
}

.rv-center {
  text-align: center;
}

.rv-kicker {
  color: var(--cyan);
  letter-spacing: 0.32em;
  margin: 0 0 10px;
}

h1,
h2 {
  margin: 0 0 14px;
  letter-spacing: 0.12em;
}

h1 {
  font-size: clamp(32px, 5vw, 76px);
  color: var(--cyan);
  text-shadow: 0 0 18px rgba(24, 216, 255, 0.42);
}

h2 {
  color: var(--text);
}

.rv-muted {
  color: var(--muted);
}

.rv-alert {
  border: 1px solid rgba(255, 63, 95, 0.45);
  color: var(--danger);
  padding: 12px;
  margin: 12px 0;
}

.rv-success {
  border: 1px solid rgba(76, 255, 154, 0.36);
  color: var(--ok);
  padding: 12px;
  margin: 12px 0;
}

.rv-success code {
  display: block;
  margin: 10px 0;
  padding: 12px;
  color: var(--text);
  background: rgba(0, 0, 0, 0.35);
  user-select: text;
  -webkit-user-select: text;
}

.rv-form {
  display: grid;
  gap: 12px;
}

.rv-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.rv-form label {
  display: grid;
  gap: 6px;
  color: var(--muted);
}

.rv-form input,
.rv-form textarea,
.rv-form select {
  width: 100%;
  border: 1px solid rgba(24, 216, 255, 0.24);
  background: rgba(0, 0, 0, 0.34);
  color: var(--text);
  padding: 11px 12px;
  outline: none;
  user-select: text;
  -webkit-user-select: text;
}

.rv-form button,
.rv-inline button,
.rv-link {
  border: 1px solid rgba(24, 216, 255, 0.5);
  color: var(--cyan);
  background: rgba(24, 216, 255, 0.08);
  padding: 10px 14px;
  text-decoration: none;
}

.rv-topline {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
}

.rv-table-wrap {
  overflow-x: auto;
}

.rv-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.rv-table th,
.rv-table td {
  border-bottom: 1px solid rgba(24, 216, 255, 0.12);
  padding: 9px;
  text-align: left;
}

.rv-inline {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.rv-strength {
  grid-column: 1 / -1;
  color: var(--muted);
}

.rv-strength.weak { color: var(--danger); }
.rv-strength.medium { color: var(--warn); }
.rv-strength.strong { color: var(--ok); }

.rv-footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 14px;
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.16em;
}

@media (max-width: 760px) {
  .rv-grid {
    grid-template-columns: 1fr;
  }

  .rv-topline {
    display: grid;
  }
}