:root {
  --sb-bg: #07101f;
  --sb-bg-2: #0a1326;
  --sb-bg-3: #101a33;
  --sb-card: rgba(15, 24, 48, 0.88);
  --sb-card-strong: rgba(18, 25, 51, 0.92);
  --sb-line: rgba(255,255,255,0.12);
  --sb-line-soft: rgba(255,255,255,0.08);
  --sb-text: #f5f7ff;
  --sb-muted: #aab5d3;
  --sb-accent: #5b8cff;
  --sb-accent-2: #7a5cff;
  --sb-success: #22c55e;
  --sb-danger: #ff5f73;
  --sb-warning: #ffb648;
  --sb-shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
  --sb-shadow-soft: 0 14px 34px rgba(0, 0, 0, 0.18);
  --sb-radius-xl: 26px;
  --sb-radius-lg: 22px;
  --sb-radius-md: 18px;
  --sb-radius-sm: 14px;
  --sb-maxw: 1200px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body.sb-page {
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--sb-text);
  background:
    radial-gradient(circle at top left, rgba(91, 140, 255, 0.20), transparent 28%),
    radial-gradient(circle at top right, rgba(122, 92, 255, 0.16), transparent 24%),
    linear-gradient(180deg, var(--sb-bg) 0%, var(--sb-bg-2) 100%);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.sb-page a {
  color: inherit;
  text-decoration: none;
}

.sb-wrap {
  width: 100%;
  max-width: var(--sb-maxw);
  margin: 0 auto;
  padding: 0 24px;
}

.sb-shell {
  width: 100%;
  max-width: var(--sb-maxw);
  margin: 0 auto;
}

.sb-card {
  background: var(--sb-card);
  border: 1px solid var(--sb-line);
  border-radius: var(--sb-radius-xl);
  box-shadow: var(--sb-shadow);
  backdrop-filter: blur(10px);
}

.sb-card-strong {
  background: var(--sb-card-strong);
}

.sb-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
  color: #dbe6ff;
  background: rgba(91, 140, 255, 0.14);
  border: 1px solid rgba(91, 140, 255, 0.28);
  width: fit-content;
}

.sb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 18px;
  border-radius: var(--sb-radius-sm);
  font-weight: 800;
  border: none;
  cursor: pointer;
  font: inherit;
  transition: transform 0.14s ease, opacity 0.14s ease, filter 0.14s ease;
}

.sb-btn:hover {
  transform: translateY(-1px);
}

.sb-btn-primary {
  color: #ffffff;
  background: linear-gradient(135deg, var(--sb-accent), var(--sb-accent-2));
  box-shadow: 0 14px 28px rgba(91, 140, 255, 0.22);
}

.sb-btn-secondary {
  color: var(--sb-text);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--sb-line);
}

.sb-btn-success {
  color: #e9fff4;
  background: rgba(34, 197, 94, 0.14);
  border: 1px solid rgba(34, 197, 94, 0.24);
}

.sb-input,
.sb-textarea,
.sb-select {
  width: 100%;
  border-radius: var(--sb-radius-sm);
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(255,255,255,0.04);
  color: var(--sb-text);
  padding: 14px 16px;
  outline: none;
  transition: 0.18s ease;
  font: inherit;
}

.sb-input::placeholder,
.sb-textarea::placeholder {
  color: #8e9ab8;
}

.sb-input:focus,
.sb-textarea:focus,
.sb-select:focus {
  border-color: rgba(91, 140, 255, 0.8);
  box-shadow: 0 0 0 4px rgba(91, 140, 255, 0.16);
  background: rgba(255,255,255,0.06);
}

.sb-textarea {
  min-height: 118px;
  resize: vertical;
}

.sb-select option {
  color: #111827;
}

.sb-label {
  font-size: 13px;
  font-weight: 700;
  color: #dce4fb;
}

.sb-hint {
  color: var(--sb-muted);
  font-size: 13px;
  line-height: 1.6;
}

.sb-status {
  min-height: 20px;
  font-size: 14px;
  color: var(--sb-muted);
}

.sb-status.success {
  color: var(--sb-success);
}

.sb-status.error {
  color: var(--sb-danger);
}

.sb-status.warning {
  color: var(--sb-warning);
}

.sb-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.sb-grid-2-tight {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.sb-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.sb-stack-12 { display: grid; gap: 12px; }
.sb-stack-14 { display: grid; gap: 14px; }
.sb-stack-16 { display: grid; gap: 16px; }
.sb-stack-18 { display: grid; gap: 18px; }
.sb-stack-20 { display: grid; gap: 20px; }
.sb-stack-24 { display: grid; gap: 24px; }

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

.sb-code {
  margin: 0;
  padding: 18px;
  overflow: auto;
  border-radius: var(--sb-radius-md);
  background: rgba(7, 14, 28, 0.92);
  border: 1px solid rgba(255,255,255,0.06);
  color: #dbe6ff;
  font-size: 13px;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}

.sb-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(7, 16, 31, 0.72);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.sb-topbar-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.sb-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: 20px;
}

.sb-brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--sb-accent), var(--sb-accent-2));
  box-shadow: 0 12px 28px rgba(91, 140, 255, 0.28);
}

.sb-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

@media (max-width: 980px) {
  .sb-grid-2,
  .sb-grid-3 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .sb-wrap {
    padding: 0 14px;
  }

  .sb-topbar-inner {
    min-height: 68px;
  }

  .sb-grid-2-tight {
    grid-template-columns: 1fr;
  }
}