:root {
  --bg: #040712;
  --bg-soft: #07111f;
  --card: rgba(10, 18, 36, 0.9);
  --text: #f7fbff;
  --muted: #9aabc7;
  --primary: #22d3ee;
  --secondary: #a855f7;
  --success: #4ade80;
  --warning: #facc15;
  --danger: #fb7185;
  --radius: 18px;
  --font-family: Inter, sans-serif;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  --border: color-mix(in srgb, var(--text) 12%, transparent);
  --primary-soft: color-mix(in srgb, var(--primary) 14%, transparent);
  --secondary-soft: color-mix(in srgb, var(--secondary) 14%, transparent);
  --danger-soft: color-mix(in srgb, var(--danger) 16%, transparent);
  --success-soft: color-mix(in srgb, var(--success) 14%, transparent);
  --warning-soft: color-mix(in srgb, var(--warning) 14%, transparent);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at top left, var(--primary-soft), transparent 34rem),
    radial-gradient(
      circle at top right,
      var(--secondary-soft),
      transparent 30rem
    ),
    var(--bg);
  color: var(--text);
  font-family: var(--font-family);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  border: 0;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 280px 1fr;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 1.25rem;
  background: color-mix(in srgb, var(--bg-soft) 88%, transparent);
  border-right: 1px solid var(--border);
  backdrop-filter: blur(18px);
  z-index: 20;
  overflow-y: auto;
}

.sidebar-brand {
  display: flex;
  gap: 0.9rem;
  align-items: center;
  padding: 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
}

.brand-mark {
  width: 2.8rem;
  height: 2.8rem;
  display: grid;
  place-items: center;
  border-radius: calc(var(--radius) - 6px);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--bg);
  font-weight: 900;
}

.brand-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 800;
}

.brand-subtitle {
  margin: 0.15rem 0 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.sidebar-nav {
  display: grid;
  gap: 0.55rem;
  margin-top: 1.25rem;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 0.95rem;
  border-radius: calc(var(--radius) - 6px);
  color: var(--muted);
  border: 1px solid transparent;
  transition: 180ms ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text);
  background: var(--primary-soft);
  border-color: color-mix(in srgb, var(--primary) 36%, transparent);
}

.nav-icon {
  width: 1.4rem;
  text-align: center;
}

.main-content {
  min-width: 0;
  padding: 1.5rem;
}

.page-container {
  width: min(1480px, 100%);
  margin: 0 auto;
}

.page-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1.25rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--primary);
  background: var(--primary-soft);
  border: 1px solid color-mix(in srgb, var(--primary) 32%, transparent);
  border-radius: 999px;
  padding: 0.35rem 0.7rem;
  font-size: 0.78rem;
  font-weight: 700;
}

.page-title {
  margin: 0.75rem 0 0.35rem;
  font-size: clamp(2rem, 4vw, 4rem);
  font-weight: 900;
  letter-spacing: -0.05em;
}

.page-description {
  max-width: 820px;
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.card-panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.panel-padding {
  padding: 1.25rem;
}

.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
  gap: 1rem;
}

.stat-card,
.module-card,
.action-card {
  padding: 1.2rem;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--border);
  transition: 180ms ease;
}

.module-card:hover,
.action-card:hover,
.stat-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--primary) 38%, transparent);
}

.card-kicker {
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.card-title {
  margin: 0.45rem 0;
  font-weight: 850;
}

.card-text {
  color: var(--muted);
  line-height: 1.65;
}

.btn-app {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--bg);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: calc(var(--radius) - 6px);
  padding: 0.78rem 1rem;
  font-weight: 850;
  transition: 180ms ease;
}

.btn-app:hover {
  transform: translateY(-2px);
  color: var(--bg);
  filter: brightness(1.08);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--text);
  background: color-mix(in srgb, var(--card) 75%, transparent);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) - 6px);
  padding: 0.75rem 1rem;
  font-weight: 800;
  transition: 180ms ease;
}

.btn-ghost:hover {
  color: var(--text);
  border-color: color-mix(in srgb, var(--primary) 38%, transparent);
  background: var(--primary-soft);
}

.form-control,
.form-select {
  color: var(--text);
  background-color: color-mix(in srgb, var(--bg-soft) 86%, transparent);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) - 8px);
}

.form-control:focus,
.form-select:focus {
  color: var(--text);
  background-color: var(--bg-soft);
  border-color: var(--primary);
  box-shadow: 0 0 0 0.2rem var(--primary-soft);
}

.form-control::placeholder {
  color: color-mix(in srgb, var(--muted) 75%, transparent);
}

.form-label {
  color: var(--muted);
  font-weight: 800;
}

.table-wrap {
  max-width: 100%;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.app-table {
  width: 100%;
  margin: 0;
  color: var(--text);
  border-collapse: separate;
  border-spacing: 0;
}

.app-table th,
.app-table td {
  padding: 0.85rem;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.app-table th {
  position: sticky;
  top: 0;
  z-index: 3;
  background: var(--bg-soft);
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.app-table tr:last-child td {
  border-bottom: 0;
}

.badge-soft {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
  color: var(--text);
  background: var(--primary-soft);
  border: 1px solid color-mix(in srgb, var(--primary) 30%, transparent);
  font-weight: 800;
  font-size: 0.78rem;
}

.status-message {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  max-width: min(420px, calc(100vw - 2rem));
  z-index: 80;
  padding: 0.9rem 1rem;
  border-radius: calc(var(--radius) - 6px);
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.status-success {
  border-color: color-mix(in srgb, var(--success) 42%, transparent);
}

.status-warning {
  border-color: color-mix(in srgb, var(--warning) 42%, transparent);
}

.status-danger {
  border-color: color-mix(in srgb, var(--danger) 42%, transparent);
}

.empty-state {
  padding: 2rem;
  text-align: center;
  color: var(--muted);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--card) 70%, transparent);
}

.code-box,
.sql-editor,
.sql-output {
  width: 100%;
  min-height: 180px;
  color: var(--text);
  background: color-mix(in srgb, var(--bg) 82%, var(--bg-soft));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  line-height: 1.65;
}

.sql-output {
  min-height: 120px;
  overflow: auto;
}

.transition-overlay {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: var(--bg);
  color: var(--text);
  opacity: 1;
  visibility: visible;
  z-index: 9999;
  transition:
    opacity 240ms ease,
    visibility 240ms ease;
}

.transition-overlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-card {
  display: none;
  text-align: center;
  padding: 1.5rem;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--border);
}

.transition-overlay.show-loader .loader-card {
  display: block;
}

.loader-ring {
  width: 3rem;
  height: 3rem;
  margin: 0 auto 1rem;
  border-radius: 50%;
  border: 0.25rem solid var(--primary-soft);
  border-top-color: var(--primary);
  animation: loaderSpin 800ms linear infinite;
}

.loader-text {
  margin: 0;
  color: var(--muted);
  font-weight: 800;
}

@keyframes loaderSpin {
  to {
    transform: rotate(360deg);
  }
}

.er-canvas,
.visual-canvas {
  position: relative;
  min-height: 520px;
  overflow: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px),
    color-mix(in srgb, var(--bg-soft) 85%, transparent);
  background-size: 42px 42px;
}

.table-node {
  position: absolute;
  min-width: 250px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.table-node-header {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: center;
  padding: 0.75rem 0.9rem;
  background: var(--primary-soft);
  border-bottom: 1px solid var(--border);
  cursor: grab;
}

.table-node-title {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 900;
}

.column-row {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.55rem 0.9rem;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
}

.column-row:last-child {
  border-bottom: 0;
}

.relationship-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.relationship-line {
  stroke: var(--primary);
  stroke-width: 2;
  fill: none;
  marker-end: url(#arrowHead);
}

.timeline {
  display: grid;
  gap: 1rem;
}

.timeline-step {
  padding: 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card);
}

.highlight-current {
  outline: 2px solid var(--primary);
  background: var(--primary-soft);
}

.highlight-match {
  outline: 2px solid var(--success);
  background: var(--success-soft);
}

.highlight-unmatched {
  outline: 2px solid var(--danger);
  background: var(--danger-soft);
}

@media (max-width: 992px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: relative;
    height: auto;
  }

  .sidebar-nav {
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  }

  .main-content {
    padding: 1rem;
  }

  .page-header {
    flex-direction: column;
  }
}

@media (max-width: 576px) {
  .sidebar,
  .main-content {
    padding: 0.85rem;
  }

  .sidebar-brand {
    align-items: flex-start;
  }

  .grid-auto {
    grid-template-columns: 1fr;
  }

  .btn-app,
  .btn-ghost {
    width: 100%;
  }
}