* {
  box-sizing: border-box;
}

:root {
  --space-black: #04040b;
  --space-deep: #0a0a1a;
  --violet: #7c4dff;
  --magenta: #e33fd1;
  --cyan: #3fe0e0;
  --gold: #f0c05a;
  --text: #dce0f5;
  --text-dim: #8b90b5;
  --panel-bg: rgba(10, 10, 26, 0.86);
  --panel-border: rgba(124, 77, 255, 0.35);
}

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--space-black);
  color: var(--text);
  font-family: 'Space Grotesk', sans-serif;
  -webkit-font-smoothing: antialiased;
}

#starfield {
  position: fixed;
  inset: 0;
  z-index: 0;
  display: block;
}

#scene-wrap {
  position: fixed;
  inset: 0;
  z-index: 1;
  perspective: 1400px;
  perspective-origin: 50% 50%;
}

#edge-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
  z-index: 1;
}

#node-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  z-index: 2;
  cursor: grab;
}

#node-layer.dragging {
  cursor: grabbing;
}

.edge-line {
  stroke: url(#edgeGradient);
  stroke-width: 1.4;
  opacity: 0.55;
  fill: none;
  filter: drop-shadow(0 0 4px rgba(124, 77, 255, 0.6));
}

.node {
  position: absolute;
  top: 0;
  left: 0;
  transform-style: preserve-3d;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: auto;
  cursor: pointer;
  user-select: none;
  will-change: transform;
}

.node-glyph-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  transition: transform 0.2s ease, filter 0.2s ease;
  filter: drop-shadow(0 0 8px var(--orb-color, var(--violet)));
}

.node:hover .node-glyph-wrap {
  transform: scale(1.14);
  filter: drop-shadow(0 0 16px var(--orb-color, var(--violet)));
}

.node.selected .node-glyph-wrap {
  filter: drop-shadow(0 0 4px #fff) drop-shadow(0 0 18px var(--orb-color, var(--violet)));
}

.node-glyph-wrap svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.node-glow-plate {
  position: absolute;
  inset: -20%;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--orb-color, var(--violet)) 45%, transparent) 0%, transparent 70%);
  z-index: -1;
}

.node-ring {
  position: absolute;
  inset: -14px;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--orb-color, var(--violet)) 55%, transparent);
  animation: ring-spin 7s linear infinite;
  opacity: 0.6;
  pointer-events: none;
}

@keyframes ring-spin {
  from { transform: rotate(0deg) scaleY(0.35); }
  to { transform: rotate(360deg) scaleY(0.35); }
}

.node-label {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--text);
  background: rgba(6, 6, 18, 0.55);
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid rgba(124, 77, 255, 0.25);
  white-space: nowrap;
  backdrop-filter: blur(3px);
  pointer-events: none;
}

.node-detail {
  font-size: 10px;
  color: var(--text-dim);
  margin-top: -4px;
  white-space: nowrap;
  pointer-events: none;
}

#masthead {
  position: fixed;
  top: 26px;
  left: 30px;
  z-index: 5;
  pointer-events: none;
}

#masthead-title {
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 0.01em;
  background: linear-gradient(90deg, #fff, var(--cyan) 60%, var(--violet));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

#masthead-sub {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 2px;
  letter-spacing: 0.05em;
}

#hud {
  position: fixed;
  top: 26px;
  right: 30px;
  z-index: 6;
  display: flex;
  gap: 10px;
}

.hud-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(10, 10, 26, 0.7);
  border: 1px solid rgba(124, 77, 255, 0.35);
  color: var(--text);
  font-family: inherit;
  font-size: 12px;
  padding: 8px 13px;
  border-radius: 999px;
  cursor: pointer;
  backdrop-filter: blur(6px);
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
  text-decoration: none;
}

.hud-btn:hover {
  border-color: var(--cyan);
  color: #fff;
}

.hud-btn.active {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(63, 224, 224, 0.08);
}

#panel {
  position: fixed;
  top: 0;
  right: 0;
  height: 100%;
  width: 340px;
  max-width: 88vw;
  background: var(--panel-bg);
  border-left: 1px solid var(--panel-border);
  backdrop-filter: blur(14px);
  z-index: 10;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

#panel.open {
  transform: translateX(0);
}

#panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 22px;
  border-bottom: 1px solid rgba(124, 77, 255, 0.2);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

#panel-close {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  padding: 0;
}

#panel-close:hover {
  color: var(--cyan);
}

#panel-body {
  flex: 1;
  overflow-y: auto;
  padding: 18px 22px 40px;
}

.panel-section {
  margin-bottom: 26px;
}

.panel-section-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

#node-list, #edge-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 10px;
  max-height: 220px;
  overflow-y: auto;
}

.list-row {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(124, 77, 255, 0.07);
  border: 1px solid rgba(124, 77, 255, 0.18);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 12.5px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.list-row:hover {
  background: rgba(124, 77, 255, 0.15);
  border-color: var(--violet);
}

.list-row.active {
  border-color: var(--cyan);
  background: rgba(63, 224, 224, 0.1);
}

.list-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 6px 1px var(--dot-color, var(--violet));
  background: var(--dot-color, var(--violet));
}

.list-row-label {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.list-row-remove {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 15px;
  cursor: pointer;
  padding: 0 2px;
  flex-shrink: 0;
}

.list-row-remove:hover {
  color: var(--magenta);
}

.ghost-btn {
  width: 100%;
  background: transparent;
  border: 1px dashed rgba(124, 77, 255, 0.5);
  color: var(--text);
  font-family: inherit;
  font-size: 12.5px;
  padding: 9px;
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.ghost-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(63, 224, 224, 0.06);
}

.primary-btn {
  width: 100%;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
  border: none;
  color: #04040b;
  font-family: inherit;
  font-weight: 600;
  font-size: 13px;
  padding: 11px;
  border-radius: 8px;
  cursor: pointer;
  transition: filter 0.15s ease;
}

.primary-btn:hover {
  filter: brightness(1.1);
}

.danger-btn {
  width: 100%;
  background: rgba(227, 63, 90, 0.1);
  border: 1px solid rgba(227, 63, 90, 0.4);
  color: #ff8a9a;
  font-family: inherit;
  font-size: 12.5px;
  padding: 9px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s ease;
}

.danger-btn:hover {
  background: rgba(227, 63, 90, 0.2);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 12px;
  font-size: 11.5px;
  color: var(--text-dim);
}

.field input[type="text"],
.field input[type="password"],
.field select {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(124, 77, 255, 0.3);
  color: var(--text);
  font-family: inherit;
  font-size: 13px;
  padding: 8px 10px;
  border-radius: 7px;
  outline: none;
}

.field input[type="text"]:focus,
.field input[type="password"]:focus,
.field select:focus {
  border-color: var(--cyan);
}

.field input[type="color"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 34px;
  background: none;
  border: 1px solid rgba(124, 77, 255, 0.3);
  border-radius: 7px;
  padding: 3px;
  cursor: pointer;
}

.field input[type="color"]::-webkit-color-swatch {
  border: none;
  border-radius: 5px;
}

.field input[type="range"] {
  width: 100%;
  accent-color: var(--cyan);
}

.field-row {
  display: flex;
  gap: 8px;
  margin-top: 4px;
}

#add-edge-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

#add-edge-row select {
  flex: 1;
  min-width: 0;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(124, 77, 255, 0.3);
  color: var(--text);
  font-family: inherit;
  font-size: 11.5px;
  padding: 7px 6px;
  border-radius: 7px;
}

#add-edge-row .arrow {
  color: var(--cyan);
  font-size: 13px;
  flex-shrink: 0;
}

#add-edge-btn {
  width: auto;
  flex-shrink: 0;
  padding: 7px 12px;
}

#tooltip {
  position: fixed;
  z-index: 20;
  pointer-events: none;
  background: rgba(10, 10, 26, 0.92);
  border: 1px solid var(--violet);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 12px;
  opacity: 0;
  transform: translate(-50%, -120%);
  transition: opacity 0.15s ease;
  white-space: nowrap;
}

#tooltip.show {
  opacity: 1;
}

#tooltip .tt-title {
  font-weight: 600;
  color: var(--cyan);
}

#tooltip .tt-detail {
  color: var(--text-dim);
  font-size: 11px;
}

#status-toast {
  position: fixed;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: rgba(10, 10, 26, 0.92);
  border: 1px solid var(--cyan);
  color: var(--text);
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 12.5px;
  z-index: 30;
  opacity: 0;
  transition: opacity 0.25s ease, transform 0.25s ease;
  pointer-events: none;
}

#status-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

#status-toast.error {
  border-color: var(--magenta);
  color: #ff9fef;
}

#login-screen {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--space-black);
}

#login-card {
  width: 320px;
  max-width: 88vw;
  background: rgba(10, 10, 26, 0.9);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 30px 26px;
  backdrop-filter: blur(10px);
  box-shadow: 0 0 40px rgba(124, 77, 255, 0.15);
}

#login-card h1 {
  font-size: 18px;
  margin: 0 0 4px;
  background: linear-gradient(90deg, #fff, var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

#login-card p {
  margin: 0 0 20px;
  color: var(--text-dim);
  font-size: 12.5px;
}

#login-error {
  color: #ff8a9a;
  font-size: 12px;
  margin-top: 10px;
  min-height: 16px;
}

.admin-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 6;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  pointer-events: none;
}

.admin-topbar > * {
  pointer-events: auto;
}

.admin-badge {
  font-size: 11px;
  color: var(--gold);
  border: 1px solid rgba(240, 192, 90, 0.4);
  background: rgba(240, 192, 90, 0.08);
  padding: 5px 11px;
  border-radius: 999px;
  letter-spacing: 0.04em;
}

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(124, 77, 255, 0.4);
  border-radius: 4px;
}

@media (max-width: 640px) {
  #masthead {
    top: 16px;
    left: 16px;
  }

  #masthead-title {
    font-size: 16px;
  }

  #hud {
    top: 16px;
    right: 16px;
    gap: 6px;
  }

  .hud-btn span {
    display: none;
  }

  .hud-btn {
    padding: 8px;
  }

  #panel {
    width: 100vw;
    max-width: 100vw;
  }
}

@media (prefers-reduced-motion: reduce) {
  .node-ring {
    animation: none;
  }
}