/* Knowledge3 Platinum-Slate tokens and theme overrides. */
:root {
  --k3-bg-main-1: #f3f5f7;
  --k3-bg-main-2: #e8ecf1;
  --k3-bg-main-3: #dde3ea;

  --k3-panel-bg: rgba(255, 255, 255, 0.85);
  --k3-panel-border: rgba(15, 23, 42, 0.08);
  --k3-panel-shadow: rgba(15, 23, 42, 0.06);

  --k3-accent-cyan: #32d6ff;
  --k3-accent-magenta: #ff3fa4;
  --k3-accent-blue: #2438ff;

  --k3-text-primary: #1e293b;
  --k3-text-secondary: #5b6472;
  --k3-text-muted: #9aa3af;

  --k3-status-success: #10b981;
  --k3-status-success-bg: rgba(16, 185, 129, 0.12);
  --k3-status-warn: #f59e0b;
  --k3-status-warn-bg: rgba(245, 158, 11, 0.12);
  --k3-status-error: #ef4444;
  --k3-status-error-bg: rgba(239, 68, 68, 0.12);

  --k3-node-primary: #2438ff;
  --k3-node-secondary: #32d6ff;
  --k3-node-tertiary: #ff3fa4;
  --k3-node-neutral: #8e9aaf;
  --k3-edge: rgba(36, 56, 255, 0.25);

  --k3-chart-1: #2438ff;
  --k3-chart-2: #32d6ff;
  --k3-chart-3: #ff3fa4;
  --k3-chart-4: #6c7cff;
  --k3-chart-5: #5fe3ff;
  --k3-chart-6: #ff7abf;

  --k3-motion: 150ms ease;
}

.theme-switch {
  margin-top: 8px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.theme-switch-label {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
}

.theme-select {
  min-width: 180px;
  height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(2, 16, 12, 0.42);
  color: var(--text);
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
  transition: border-color var(--k3-motion), box-shadow var(--k3-motion), background var(--k3-motion), color var(--k3-motion);
}

.theme-select:hover {
  border-color: var(--accent);
}

.theme-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(47, 207, 142, 0.2);
}

.theme-demo-panel {
  margin-top: 0;
}

.theme-demo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.theme-demo-card {
  border: 1px dashed rgba(161, 240, 205, 0.35);
  border-radius: 12px;
  padding: 14px;
  background: rgba(4, 16, 12, 0.34);
}

.theme-demo-card-wide {
  grid-column: 1 / -1;
}

.theme-demo-card h3 {
  margin: 0 0 10px;
}

.theme-demo-actions,
.theme-demo-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.k3-badge,
.k3-tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 600;
}

.k3-badge {
  background: rgba(47, 207, 142, 0.18);
  color: #b9f8df;
  border: 1px solid rgba(47, 207, 142, 0.38);
}

.k3-tag {
  background: rgba(6, 28, 20, 0.64);
  color: #d4ffee;
  border: 1px solid rgba(103, 191, 152, 0.5);
}

.k3-tag-accent {
  background: rgba(210, 90, 159, 0.2);
  border-color: rgba(210, 90, 159, 0.5);
  color: #ffd4ea;
}

.k3-alert-stack {
  display: grid;
  gap: 8px;
}

.k3-alert {
  display: grid;
  grid-template-columns: 16px 1fr;
  gap: 8px;
  align-items: center;
  border-radius: 10px;
  padding: 8px 10px;
  color: #d4ffee;
  border: 1px solid transparent;
  font-size: 12px;
}

.k3-alert-icon {
  font-size: 13px;
  line-height: 1;
  color: currentColor;
}

.k3-alert-success {
  background: var(--k3-status-success-bg);
  border-color: rgba(16, 185, 129, 0.28);
}

.k3-alert-warn {
  background: var(--k3-status-warn-bg);
  border-color: rgba(245, 158, 11, 0.28);
}

.k3-alert-error {
  background: var(--k3-status-error-bg);
  border-color: rgba(239, 68, 68, 0.28);
}

.theme-table-wrap {
  overflow-x: auto;
}

.k3-table {
  width: 100%;
  border-collapse: collapse;
  border-spacing: 0;
  font-size: 13px;
}

.k3-table th {
  background: #103d2f;
  color: #e4fff3;
  text-align: left;
  padding: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.k3-table td {
  padding: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.k3-table tbody tr:hover td {
  background: rgba(7, 32, 23, 0.58);
}

.k3-demo-chart,
.k3-mini-graph {
  width: 100%;
  height: auto;
  border-radius: 10px;
  border: 1px solid rgba(103, 191, 152, 0.45);
  background: rgba(5, 17, 13, 0.68);
}

.k3-chart-axis {
  stroke: rgba(181, 241, 215, 0.45);
  stroke-width: 1.2;
}

.k3-series-1 { fill: var(--k3-chart-1); }
.k3-series-2 { fill: var(--k3-chart-2); }
.k3-series-3 { fill: var(--k3-chart-3); }
.k3-series-4 { fill: var(--k3-chart-4); }
.k3-series-5 { fill: var(--k3-chart-5); }
.k3-series-6 { fill: var(--k3-chart-6); }

.k3-series-legend,
.k3-graph-legend {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  font-size: 12px;
  color: #b8e8d4;
}

.k3-series-legend span,
.k3-graph-legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.k3-series-swatch,
.k3-graph-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.k3-graph-edge {
  stroke: var(--k3-edge);
  stroke-width: 2.4;
}

.k3-node-primary { fill: var(--k3-node-primary); }
.k3-node-secondary { fill: var(--k3-node-secondary); }
.k3-node-tertiary { fill: var(--k3-node-tertiary); }
.k3-node-neutral { fill: var(--k3-node-neutral); }

body[data-theme="platinum-slate"] {
  --bg-top: var(--k3-bg-main-1);
  --bg-bottom: var(--k3-bg-main-3);
  --surface: #dee6ee;
  --surface-2: #e7eef5;
  --text: var(--k3-text-primary);
  --muted: var(--k3-text-secondary);
  --line: var(--k3-panel-border);
  --accent: var(--k3-accent-blue);
  --accent-soft: var(--k3-accent-cyan);
  --field-bg: #edf3f8;
  --output-bg: #d4deea;
  --brand-sign-bg: rgba(229, 237, 245, 0.94);
  --brand-sign-border: rgba(15, 23, 42, 0.24);
  --brand-sign-title: var(--k3-text-primary);
  --brand-sign-meta: var(--k3-text-secondary);
  --brand-sign-separator: var(--k3-accent-blue);
  background: linear-gradient(135deg, #dde4ec 0%, #ced7e0 60%, #c0cad5 100%);
  color: var(--k3-text-primary);
  font-family: "Inter", "Avenir Next", "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

body[data-theme="platinum-slate"]::before {
  opacity: 0.04;
}

body[data-theme="platinum-slate"] .brand-header {
  background: rgba(213, 223, 235, 0.95);
  border-bottom: 1px solid rgba(15, 23, 42, 0.14);
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.065);
}

body[data-theme="platinum-slate"] .brand-headings,
body[data-theme="platinum-slate"] .brand-top,
body[data-theme="platinum-slate"] .sub {
  color: var(--k3-text-primary);
}

body[data-theme="platinum-slate"] .brand-sign {
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.09);
}

body[data-theme="platinum-slate"] .graph-title {
  font-size: 14px !important;
  line-height: 1.2;
  color: var(--brand-sign-title);
}

body[data-theme="platinum-slate"] .sub {
  font-size: 11px;
  line-height: 1.2;
  color: var(--k3-text-secondary);
}

body[data-theme="platinum-slate"] header code {
  color: var(--k3-text-primary);
  background: #e6edf4;
  border: 1px solid rgba(15, 23, 42, 0.16);
}

body[data-theme="platinum-slate"] main {
  grid-template-columns: minmax(380px, 460px) minmax(0, 1fr);
  gap: 16px;
  padding: 16px;
}

body[data-theme="platinum-slate"] .panel {
  background: rgba(218, 227, 236, 0.97);
  border-radius: 12px;
  border: 1px solid rgba(15, 23, 42, 0.14);
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.07);
  padding: 14px;
  transition: transform var(--k3-motion), box-shadow var(--k3-motion), border-color var(--k3-motion);
}

body[data-theme="platinum-slate"] .panel:hover {
  transform: translateY(-2px);
}

body[data-theme="platinum-slate"] .panel::after,
body[data-theme="platinum-slate"] .panel::before {
  background: none;
}

body[data-theme="platinum-slate"] h1 {
  margin: 0;
  color: var(--k3-text-primary);
}

body[data-theme="platinum-slate"] h2 {
  font-size: 16px;
  margin: 0 0 10px;
  color: var(--k3-text-primary);
}

body[data-theme="platinum-slate"] h3 {
  font-size: 16px;
  margin: 0 0 8px;
  color: var(--k3-text-primary);
}

body[data-theme="platinum-slate"] .small-note,
body[data-theme="platinum-slate"] .service-order-step,
body[data-theme="platinum-slate"] .footer-tip {
  font-size: 12px;
  color: var(--k3-text-muted);
}

body[data-theme="platinum-slate"] label {
  color: var(--k3-text-secondary);
  font-size: 12px;
}

body[data-theme="platinum-slate"] input,
body[data-theme="platinum-slate"] select,
body[data-theme="platinum-slate"] textarea {
  background: #edf3f8;
  border: 1px solid rgba(15, 23, 42, 0.19);
  border-radius: 8px;
  padding: 10px;
  color: var(--k3-text-primary);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.76),
    0 1px 0 rgba(15, 23, 42, 0.045);
  transition: border-color var(--k3-motion), box-shadow var(--k3-motion), background var(--k3-motion);
}

body[data-theme="platinum-slate"] input::placeholder,
body[data-theme="platinum-slate"] textarea::placeholder {
  color: var(--k3-text-muted);
}

body[data-theme="platinum-slate"] input:focus,
body[data-theme="platinum-slate"] select:focus,
body[data-theme="platinum-slate"] textarea:focus {
  outline: none;
  border: 1px solid #32d6ff;
  box-shadow: 0 0 0 3px rgba(50, 214, 255, 0.15);
}

body[data-theme="platinum-slate"] .numbered-textarea-shell {
  border: 1px solid rgba(15, 23, 42, 0.16);
  border-radius: 8px;
  background: #edf3f8;
}

body[data-theme="platinum-slate"] .numbered-textarea-shell .line-numbers {
  border-right: 1px solid rgba(0, 0, 0, 0.11);
  color: var(--k3-text-muted);
  background: #d2dce8;
}

body[data-theme="platinum-slate"] .pipeline-organizer,
body[data-theme="platinum-slate"] .panel-wide .pipeline-organizer {
  border-top: 1px solid rgba(15, 23, 42, 0.11);
}

body[data-theme="platinum-slate"] button {
  border: 1px solid #2438ff;
  background: #2438ff;
  color: #ffffff;
  border-radius: 8px;
  transition: background var(--k3-motion), border-color var(--k3-motion), color var(--k3-motion);
}

body[data-theme="platinum-slate"] button:hover {
  border-color: #3a4cff;
  background: #3a4cff;
}

body[data-theme="platinum-slate"] button.secondary {
  background: #e6edf5;
  border: 1px solid rgba(15, 23, 42, 0.16);
  color: #1e293b;
  border-radius: 8px;
}

body[data-theme="platinum-slate"] button.secondary:hover {
  background: #dde6f0;
  border-color: rgba(15, 23, 42, 0.2);
}

body[data-theme="platinum-slate"] button.ghost {
  background: transparent;
  color: #2438ff;
  border: 1px solid transparent;
  border-radius: 8px;
}

body[data-theme="platinum-slate"] button.ghost:hover {
  background: rgba(36, 56, 255, 0.08);
  border-color: rgba(36, 56, 255, 0.14);
}

body[data-theme="platinum-slate"] .output-mode {
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

body[data-theme="platinum-slate"] .output-mode-btn {
  background: #e4ecf4;
  color: #1e293b;
  border: 1px solid rgba(15, 23, 42, 0.15);
  border-bottom: none;
}

body[data-theme="platinum-slate"] .output-mode-btn:hover {
  background: #dce6f0;
  border-color: rgba(15, 23, 42, 0.2);
}

body[data-theme="platinum-slate"] .output-mode-btn.is-active {
  background: #2438ff;
  border-color: #2438ff;
  color: #ffffff;
}

body[data-theme="platinum-slate"] .out {
  background: #d2dce8;
  color: var(--k3-text-primary);
  border: 1px solid rgba(15, 23, 42, 0.16);
}

body[data-theme="platinum-slate"] .copy-json-btn,
body[data-theme="platinum-slate"] .fullscreen-json-btn {
  background: #e4ecf4;
  color: #1e293b;
  border: 1px solid rgba(15, 23, 42, 0.16);
}

body[data-theme="platinum-slate"] .copy-json-btn:hover,
body[data-theme="platinum-slate"] .fullscreen-json-btn:hover,
body[data-theme="platinum-slate"] .fullscreen-json-btn.is-active {
  background: #dce6f0;
  border-color: #2438ff;
  color: #2438ff;
}

body[data-theme="platinum-slate"] .lambda-row {
  border: 1px solid rgba(15, 23, 42, 0.15);
  background: rgba(211, 221, 231, 0.97);
  outline: none;
}

body[data-theme="platinum-slate"] .lambda-row .lambda-input {
  border: 1px solid rgba(15, 23, 42, 0.19);
  background: #edf3f8;
  color: #1e293b;
}

body[data-theme="platinum-slate"] .lambda-row .lambda-input:focus {
  border: 1px solid #32d6ff;
  box-shadow: 0 0 0 3px rgba(50, 214, 255, 0.15);
}

body[data-theme="platinum-slate"] .lambda-row-error-text {
  color: #ef4444;
}

body[data-theme="platinum-slate"] .k3-alert {
  color: #1e293b;
}

body[data-theme="platinum-slate"] .k3-alert-success { background: rgba(16, 185, 129, 0.12); }
body[data-theme="platinum-slate"] .k3-alert-warn { background: rgba(245, 158, 11, 0.12); }
body[data-theme="platinum-slate"] .k3-alert-error { background: rgba(239, 68, 68, 0.12); }

body[data-theme="platinum-slate"] .k3-badge {
  background: rgba(36, 56, 255, 0.1);
  color: #1e293b;
  border-color: rgba(36, 56, 255, 0.24);
}

body[data-theme="platinum-slate"] .k3-tag {
  background: #eef3f8;
  color: #1e293b;
  border-color: rgba(15, 23, 42, 0.12);
}

body[data-theme="platinum-slate"] .k3-tag-accent {
  background: rgba(255, 63, 164, 0.12);
  color: #1e293b;
  border-color: rgba(255, 63, 164, 0.22);
}

body[data-theme="platinum-slate"] .k3-table th {
  background: #f1f4f7;
  color: #1e293b;
}

body[data-theme="platinum-slate"] .k3-table td {
  color: #1e293b;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

body[data-theme="platinum-slate"] .k3-table tbody tr:hover td {
  background: #f7f9fc;
}

body[data-theme="platinum-slate"] .k3-demo-chart,
body[data-theme="platinum-slate"] .k3-mini-graph {
  border: 1px solid rgba(15, 23, 42, 0.14);
  background: rgba(217, 227, 237, 0.95);
}

body[data-theme="platinum-slate"] .k3-chart-axis {
  stroke: rgba(30, 41, 59, 0.26);
}

body[data-theme="platinum-slate"] .k3-series-legend,
body[data-theme="platinum-slate"] .k3-graph-legend {
  color: var(--k3-text-secondary);
}

body[data-theme="platinum-slate"] footer {
  color: var(--k3-text-secondary);
}

body[data-theme="platinum-slate"] .footer-brand-mark {
  border: 1px solid rgba(15, 23, 42, 0.12);
}

body[data-theme="platinum-slate"] footer code {
  color: var(--k3-text-primary);
  background: #e6edf4;
  border: 1px solid rgba(15, 23, 42, 0.16);
}

body[data-theme="platinum-slate"] .theme-switch-label {
  color: var(--k3-text-secondary);
}

body[data-theme="platinum-slate"] .theme-select {
  border: 1px solid rgba(15, 23, 42, 0.16);
  background: #e5edf5;
  color: var(--k3-text-secondary);
}

body[data-theme="platinum-slate"] .theme-select:hover {
  border-color: rgba(36, 56, 255, 0.3);
}

body[data-theme="platinum-slate"] .theme-select:focus {
  border-color: #32d6ff;
  box-shadow: 0 0 0 3px rgba(50, 214, 255, 0.15);
}

body[data-theme="platinum-slate"] .theme-demo-card {
  border-color: rgba(15, 23, 42, 0.15);
  background: rgba(217, 226, 236, 0.95);
}

@media (max-width: 980px) {
  .theme-demo-grid {
    grid-template-columns: 1fr;
  }

  .theme-demo-card-wide {
    grid-column: auto;
  }

  .theme-switch {
    justify-content: flex-start;
  }
}