:root {
  --rv-bg: #f6f8fb;
  --rv-card: #ffffff;
  --rv-border: #dfe6f1;
  --rv-text: #1a2433;
  --rv-muted: #6a7a90;
  --rv-accent: #1e88e5;
  --rv-accent-dark: #1565c0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background: var(--rv-bg);
  color: var(--rv-text);
}

.rv-header {
  background: #0f172a;
  color: #fff;
  padding: 18px 24px;
}

.rv-header__inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.rv-brand {
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: 14px;
  opacity: 0.8;
}

.rv-title {
  font-size: 18px;
  font-weight: 600;
}

.rv-shell {
  max-width: 1100px;
  margin: 24px auto 60px;
  padding: 0 24px;
  display: grid;
  gap: 20px;
}

.rv-card {
  background: var(--rv-card);
  border: 1px solid var(--rv-border);
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08);
}

.rv-card__title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.rv-lead {
  margin: 0 0 16px;
  color: var(--rv-muted);
  line-height: 1.5;
}

.rv-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.rv-row--spread {
  justify-content: space-between;
}

.rv-input {
  flex: 1 1 280px;
  padding: 10px 12px;
  border: 1px solid var(--rv-border);
  border-radius: 10px;
  font-size: 14px;
}

.rv-input--small {
  flex: 0 0 90px;
  padding: 8px 10px;
}

.rv-btn {
  border: 1px solid var(--rv-border);
  background: #fff;
  color: var(--rv-text);
  padding: 10px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 600;
}

.rv-btn--ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.35);
  color: #fff;
  text-decoration: none;
}

.rv-btn--ghost:hover {
  border-color: #fff;
}

.rv-btn--primary {
  background: var(--rv-accent);
  border-color: var(--rv-accent);
  color: #fff;
}

.rv-btn--primary:hover {
  background: var(--rv-accent-dark);
  border-color: var(--rv-accent-dark);
}

.rv-btn--danger {
  background: #fee2e2;
  border-color: #fecaca;
  color: #b91c1c;
}

.rv-btn--danger:hover {
  background: #fecaca;
}

.rv-hint {
  margin-top: 10px;
  color: var(--rv-muted);
}

.rv-muted {
  color: var(--rv-muted);
  font-size: 14px;
}

.rv-list {
  margin-top: 16px;
  display: grid;
  gap: 12px;
}

.rv-list--table {
  gap: 0;
  border: 1px solid var(--rv-border);
  border-radius: 12px;
  overflow: hidden;
  max-height: 520px;
  overflow-y: auto;
}

.rv-list-head,
.rv-list-row {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr 1fr 1fr 0.6fr;
  gap: 12px;
  align-items: center;
  padding: 12px 14px;
}

.rv-list-head {
  background: #eef2f8;
  font-weight: 600;
}

.rv-list-row:nth-child(even) {
  background: #fafbfe;
}

.rv-token {
  font-family: "Courier New", monospace;
  font-size: 13px;
}

.rv-list-item {
  padding: 14px;
  border: 1px solid var(--rv-border);
  border-radius: 12px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.rv-list-meta {
  display: grid;
  gap: 4px;
}

.rv-list-title {
  font-weight: 600;
}

.rv-analog {
  color: var(--rv-muted);
  font-size: 12px;
  margin-left: 6px;
}

.rv-list-date {
  color: var(--rv-muted);
  font-size: 13px;
}

.rv-practice {
  flex-basis: 100%;
  border-top: 1px dashed var(--rv-border);
  padding-top: 12px;
  display: grid;
  gap: 12px;
}

.rv-num-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(42px, 1fr));
  gap: 8px;
}

.rv-num {
  border: 1px solid var(--rv-border);
  background: #fff;
  border-radius: 8px;
  padding: 8px 0;
  cursor: pointer;
  font-weight: 600;
}

.rv-num--active {
  background: #dcfce7;
  border-color: #4ade80;
  color: #14532d;
}

.hidden {
  display: none !important;
}