:root {
  --primary: #0F2A44;
  --primary-dark: #0a1d30;
  --accent: #0FB9B1;
  --muted: #6b7280;
  --surface: #ffffff;
  --surface-soft: #f4f6f8;
  --border: #dbe2ea;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: #eef2f6;
  color: #1f2937;
}

.app-shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
}

.sidebar {
  background: var(--primary);
  color: #fff;
  padding: 1.25rem 1rem;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--accent);
  color: #063a37;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
}

.brand-title {
  font-weight: 700;
}

.brand-subtitle {
  font-size: 0.78rem;
  opacity: 0.85;
}

.nav-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.nav-link {
  color: #d5deea;
  text-decoration: none;
  padding: 0.68rem 0.75rem;
  border-radius: 8px;
}

.nav-link:hover,
.nav-link.active {
  background: #13385b;
  color: #fff;
}

.main-content {
  padding: 1.25rem 1.6rem;
}

.top-header {
  margin-bottom: 1rem;
}

.top-header h1 {
  margin: 0;
  color: var(--primary);
  font-size: 1.35rem;
}

.top-header p {
  margin: 0.25rem 0 0;
  color: var(--muted);
}

.page-content {
  display: grid;
  gap: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 1.2rem;
  max-width: 100%;
  overflow: hidden;
}

.card h2, .card h3 {
  margin: 0 0 0.5rem;
  color: var(--primary);
}

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

.form-grid {
  margin-top: 1rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.field label {
  font-size: 0.9rem;
  color: #334155;
}

input {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.58rem 0.68rem;
  font-size: 0.95rem;
}

input:focus {
  border-color: var(--accent);
  outline: none;
  box-shadow: 0 0 0 3px rgba(15, 185, 177, 0.2);
}

.checkbox-row {
  align-items: center;
  flex-direction: row;
  gap: 0.5rem;
  grid-column: 1 / -1;
}

.actions {
  grid-column: 1 / -1;
  display: flex;
  gap: 0.65rem;
  margin-top: 0.2rem;
}

.actions form {
  margin: 0;
}

.btn {
  display: inline-block;
  border: none;
  border-radius: 8px;
  padding: 0.6rem 0.95rem;
  text-decoration: none;
  cursor: pointer;
  font-weight: 600;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
}

.btn-secondary {
  background: #e8edf3;
  color: #1f2937;
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  margin: 1rem 0;
}

.meta-label {
  font-size: 0.76rem;
  text-transform: uppercase;
  color: #64748b;
}

.meta-value {
  font-weight: 600;
}

.alert {
  padding: 0.65rem 0.8rem;
  border-radius: 8px;
  margin: 0.7rem 0;
}

.alert-error {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

.error-text {
  color: #b91c1c;
  font-size: 0.8rem;
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  border-bottom: 1px solid var(--border);
  text-align: left;
  padding: 0.6rem 0.3rem;
  font-size: 0.92rem;
}

pre {
  background: var(--surface-soft);
  padding: 0.8rem;
  border-radius: 8px;
  overflow: auto;
  max-height: 360px;
  max-width: 100%;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.callout {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.8rem;
  margin-top: 0.75rem;
  background: #fbfcfe;
}

.callout-title {
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.35rem;
}

.callout-row {
  margin: 0.15rem 0;
  color: #334155;
}

.callout code,
.callout-row code {
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}

@media (max-width: 960px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: sticky;
    top: 0;
    z-index: 10;
  }

  .form-grid,
  .meta-grid {
    grid-template-columns: 1fr;
  }
}