:root {
  color-scheme: light;
  --bg: oklch(0.97 0.015 75);
  --panel: oklch(0.995 0.006 75);
  --ink: oklch(0.2 0.025 250);
  --muted: oklch(0.4 0.03 250);
  --line: oklch(0.84 0.015 75);
  --accent: oklch(0.58 0.18 25);
  --accent-hover: oklch(0.5 0.2 25);
  --accent-soft: oklch(0.92 0.06 25);
  --accent-ring: oklch(0.58 0.18 25);
  --success-bg: oklch(0.55 0.14 145);
  --success-fg: oklch(0.99 0.006 145);
  --danger-bg: oklch(0.52 0.18 28);
  --danger-fg: oklch(0.99 0.006 20);
  --error-bg: oklch(0.92 0.08 28);
  --error-fg: oklch(0.42 0.16 28);
  --shadow-sm: 0 1px 3px oklch(0 0 0 / 0.06);
  --shadow-md: 0 4px 12px oklch(0 0 0 / 0.06), 0 1px 3px oklch(0 0 0 / 0.04);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Aptos", "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

a {
  color: inherit;
}

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

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 240px;
  padding: 24px 16px;
  background: oklch(0.16 0.025 250);
  color: oklch(0.92 0.01 250);
}

.brand {
  font-weight: 700;
  margin-bottom: 28px;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.sidebar nav {
  display: grid;
  gap: 6px;
}

.sidebar a {
  padding: 10px 12px;
  border-radius: 8px;
  text-decoration: none;
  color: oklch(0.82 0.015 250);
  transition: background 0.15s, color 0.15s;
}

.sidebar a.active {
  background: oklch(0.28 0.045 250);
  color: oklch(0.98 0.006 250);
  box-shadow: inset 3px 0 0 var(--accent);
}
.sidebar a:hover {
  background: oklch(0.24 0.035 250);
  color: oklch(0.92 0.01 250);
}

.main {
  margin-left: 240px;
  min-height: 100vh;
  padding: 28px 36px 48px;
}

.topbar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
  color: var(--muted);
}

.topbar button,
.login-panel button {
  border: 0;
  border-radius: 8px;
  padding: 11px 16px;
  background: var(--accent);
  color: white;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s, box-shadow 0.15s;
}
.topbar button:hover,
.login-panel button:hover {
  background: var(--accent-hover);
  box-shadow: var(--shadow-sm);
}
.topbar button:active,
.login-panel button:active {
  transform: scale(0.97);
}

.page-head {
  max-width: 760px;
  margin-bottom: 24px;
}

.page-head h1 {
  font-size: 1.75rem;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
  color: oklch(0.15 0.05 250);
}

.page-head p {
  color: var(--muted);
  margin: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.panel,
.login-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.panel h2 {
  margin: 0 0 8px;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: oklch(0.15 0.05 250);
}

.panel p {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.webhook-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
}

.webhook-row code {
  flex: 1;
  min-width: 0;
  word-break: break-all;
  font-size: 0.85em;
}

.copy-btn {
  flex-shrink: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 8px;
  background: var(--panel);
  color: var(--muted);
  cursor: pointer;
  font-size: 0.78rem;
  line-height: 1;
  transition: background 0.15s, color 0.15s;
}

.copy-btn:hover {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.copy-btn.copied {
  background: var(--success-bg);
  color: var(--success-fg);
  border-color: var(--success-bg);
}

.danger-btn {
  border: 0;
  border-radius: 8px;
  padding: 11px 16px;
  background: var(--danger-bg);
  color: var(--danger-fg);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.danger-btn:hover {
  background: oklch(0.44 0.2 28);
}
.danger-btn:active {
  transform: scale(0.97);
}

.panel-actions {
  margin-top: 12px;
  display: flex;
  gap: 8px;
}

.login-body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-panel {
  width: min(420px, 100%);
  display: grid;
  gap: 14px;
}

.login-panel h1 {
  margin: 0 0 8px;
}

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

.login-panel input,
input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: white;
  color: var(--ink);
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
  outline: none;
}

.alert {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 0.9rem;
  font-weight: 500;
}
.alert-success {
  background: var(--success-bg);
  color: var(--success-fg);
}
.alert-error {
  background: var(--error-bg);
  color: var(--error-fg);
  border: 1px solid oklch(0.62 0.15 28);
}

.error {
  color: var(--error-fg);
  margin: 0;
}

:focus-visible {
  outline: 2px solid var(--accent-ring);
  outline-offset: 2px;
}

:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (max-width: 760px) {
  .sidebar {
    position: static;
    width: auto;
    border-bottom: 2px solid oklch(0.22 0.035 250);
  }

  .sidebar nav {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
  }

  .sidebar a {
    font-size: 0.85rem;
    padding: 8px 10px;
    white-space: nowrap;
  }

  .main {
    margin-left: 0;
    padding: 20px;
  }
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

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

.form-grid .wide {
  grid-column: 1 / -1;
}

.form-grid button {
  border: 0;
  border-radius: 8px;
  padding: 11px 16px;
  background: var(--accent);
  color: white;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.form-grid button:hover {
  background: var(--accent-hover);
  box-shadow: var(--shadow-sm);
}
.form-grid button:active {
  transform: scale(0.97);
}

textarea {
  resize: vertical;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.data-table th,
.data-table td {
  text-align: left;
  padding: 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.data-table th {
  color: var(--muted);
  font-weight: 700;
}

.data-table button {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  background: white;
  color: var(--ink);
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.15s;
}
.data-table button:hover {
  background: var(--bg);
  box-shadow: var(--shadow-sm);
}

.actions {
  white-space: nowrap;
}

.action-btn {
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 0.82rem;
  background: white;
  color: var(--ink);
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}
.action-btn:hover {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}
.action-btn.danger:hover {
  background: var(--danger-bg);
  border-color: var(--danger-bg);
}

.inline-form {
  display: inline;
}

.btn-ghost {
  display: inline-block;
  padding: 11px 16px;
  border-radius: 8px;
  text-decoration: none;
  color: var(--muted);
  font-size: 0.9rem;
  transition: color 0.15s;
}
.btn-ghost:hover {
  color: var(--ink);
}

.action-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

.form-grid .checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  grid-column: 1 / -1;
}
.form-grid .checkbox-label input[type="checkbox"] {
  width: auto;
  flex-shrink: 0;
}

.section-divider {
  grid-column: 1 / -1;
  border: 0;
  border-top: 1px solid var(--line);
  margin: 8px 0;
}

.result {
  margin-top: 20px;
}

.result h2 {
  margin: 0 0 8px;
}

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

.graph-controls {
  display: grid;
  grid-template-columns: 140px minmax(220px, 1.2fr) minmax(180px, 1fr) minmax(140px, 0.8fr) 96px 110px 140px auto;
  gap: 16px;
  align-items: end;
  margin-bottom: 20px;
}

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

.graph-control-disabled {
  opacity: 0.55;
}

.graph-controls button,
.graph-secondary-action {
  border: 0;
  border-radius: 8px;
  padding: 11px 16px;
  background: var(--accent);
  color: white;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}
.graph-controls button:hover,
.graph-secondary-action:hover:not(:disabled) {
  background: var(--accent-hover);
}
.graph-controls button:active,
.graph-secondary-action:active:not(:disabled) {
  transform: scale(0.97);
}

.graph-secondary-action {
  width: 100%;
  margin: 0 0 18px;
}

.graph-secondary-action:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.graph-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 20px;
  align-items: stretch;
}

.graph-canvas-wrap,
.graph-detail {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.graph-canvas-wrap {
  position: relative;
  min-height: 560px;
  overflow: hidden;
}

.graph-canvas {
  width: 100%;
  height: 560px;
  display: block;
}

.graph-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--muted);
  padding: 24px;
  text-align: center;
}

.graph-empty[hidden] {
  display: none;
}

.graph-edge {
  stroke: oklch(0.68 0.03 250);
  stroke-width: 1.5;
}

.graph-edge-label {
  fill: var(--muted);
  font-size: 0.72rem;
  paint-order: stroke;
  stroke: var(--panel);
  stroke-width: 4px;
  text-anchor: middle;
  dominant-baseline: central;
}

.graph-node {
  cursor: pointer;
  outline: none;
}

.graph-node circle {
  fill: oklch(0.92 0.06 25);
  stroke: var(--accent);
  stroke-width: 2;
}

.graph-node:hover circle,
.graph-node:focus circle {
  fill: var(--accent-soft);
}

.graph-node text {
  fill: var(--ink);
  font-size: 0.78rem;
  font-weight: 700;
  pointer-events: none;
}

.graph-detail {
  padding: 20px;
  min-width: 0;
}

.graph-detail h2 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

.graph-detail h3 {
  margin: 18px 0 8px;
  color: var(--muted);
  font-size: 0.82rem;
  text-transform: uppercase;
}

.graph-detail p {
  margin: 0 0 16px;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.graph-detail pre {
  margin: 0;
  padding: 14px;
  border-radius: 8px;
  background: var(--bg);
  border: 1px solid var(--line);
  color: var(--ink);
  overflow: auto;
  max-height: 420px;
  white-space: pre-wrap;
}

.graph-neighbor-list {
  display: grid;
  gap: 8px;
  list-style: none;
  margin: 0;
  max-height: 150px;
  overflow: auto;
  padding: 0;
}

.graph-neighbor-list li {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  overflow-wrap: anywhere;
}

.graph-status {
  color: var(--muted);
  margin: 16px 0 0;
}

@media (max-width: 980px) {
  .graph-controls,
  .graph-shell {
    grid-template-columns: 1fr;
  }

  .graph-canvas-wrap {
    min-height: 420px;
  }

  .graph-canvas {
    height: 420px;
  }
}