:root {
  --bg-a: #f5f8ff;
  --bg-b: #ecfff8;
  --panel: #ffffffcc;
  --panel-border: #d6e4ff;
  --ink: #10263f;
  --ink-soft: #4a5f79;
  --brand: #1155cc;
  --brand-strong: #0b3e97;
  --accent: #0f9b77;
  --danger: #b42318;
  --card: #ffffff;
  --line: #9db7da;
  --shadow: 0 14px 40px rgba(17, 85, 204, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Manrope", "Segoe UI", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 15% 20%, #cbe2ff 0, transparent 40%),
    radial-gradient(circle at 85% 10%, #c7f8e4 0, transparent 35%),
    linear-gradient(140deg, var(--bg-a), var(--bg-b));
}

.background-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    120deg,
    rgba(255, 255, 255, 0.08) 0,
    rgba(255, 255, 255, 0.08) 2px,
    transparent 2px,
    transparent 16px
  );
  opacity: 0.35;
}

.app-shell {
  position: relative;
  max-width: 1400px;
  margin: 0 auto;
  padding: 28px 16px 40px;
}

.hero {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 18px;
  margin-bottom: 16px;
  animation: rise 420ms ease-out both;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.5rem);
}

.company-logo {
  display: block;
  max-height: 56px;
  width: auto;
  margin: 0 0 8px;
  object-fit: contain;
}

.subtitle {
  margin: 6px 0 0;
  color: var(--ink-soft);
  max-width: 780px;
}

.hero-actions {
  display: flex;
  gap: 8px;
}

.panel {
  border: 1px solid var(--panel-border);
  background: var(--panel);
  backdrop-filter: blur(10px);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 14px;
  margin-top: 14px;
}

.controls-panel {
  animation: rise 540ms ease-out both;
}

.control-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(160px, 1fr));
  gap: 10px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-soft);
}

input[type="text"],
input[type="number"],
input[type="search"] {
  border: 1px solid #c7d8f2;
  border-radius: 10px;
  padding: 9px 10px;
  font: inherit;
  color: var(--ink);
  background: #fff;
}

.inline-toggle {
  justify-content: flex-end;
  flex-direction: row;
  align-items: center;
  margin-top: 22px;
  font-weight: 700;
}

.controls-row {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.zoom-row {
  display: grid;
  grid-template-columns: auto auto 1fr auto auto;
  gap: 8px;
  align-items: center;
  margin-top: 10px;
}

.zoom-label,
.zoom-value {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--ink-soft);
}

.zoom-row input[type="range"] {
  width: 100%;
}

.btn {
  border: 1px solid transparent;
  border-radius: 10px;
  font: inherit;
  font-weight: 700;
  padding: 9px 14px;
  cursor: pointer;
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand), var(--brand-strong));
  color: #fff;
}

.btn-secondary {
  border-color: #b8ccef;
  background: #f4f8ff;
  color: var(--brand-strong);
}

.btn-ghost {
  border-color: #b8ccef;
  background: #fff;
  color: var(--brand-strong);
}

.status-row {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

#statusText,
#signedInText {
  margin: 0;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.chart-wrap {
  margin-top: 10px;
  min-height: 420px;
  overflow: auto;
  padding: 18px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.65), rgba(230, 241, 255, 0.45));
  border-radius: 10px;
  border: 1px solid #d7e5ff;
}

.chart-wrap.pannable {
  cursor: grab;
}

.chart-wrap.pannable.is-panning {
  cursor: grabbing;
  user-select: none;
}

.chart-wrap .tree-root {
  transform: scale(var(--chart-scale, 1));
  transform-origin: top left;
  width: calc(100% / var(--chart-scale, 1));
}

.empty-state {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-soft);
  text-align: center;
}

.tree-root {
  width: max-content;
  min-width: 100%;
}

.node {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 0 auto;
  position: relative;
}

.card {
  min-width: 210px;
  max-width: 280px;
  background: var(--card);
  border: 1px solid #cdddf8;
  border-radius: 12px;
  padding: 10px;
  box-shadow: 0 8px 16px rgba(16, 38, 63, 0.08);
}

.card.highlight {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(15, 155, 119, 0.2);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 8px;
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(140deg, #dce8ff, #b8d1ff);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: var(--brand-strong);
  overflow: hidden;
}

.avatar-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.name {
  font-weight: 800;
  font-size: 0.95rem;
}

.meta {
  margin-top: 2px;
  font-size: 0.78rem;
  color: var(--ink-soft);
}

.card-controls {
  margin-top: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.toggle {
  border: 1px solid #b9cdef;
  background: #f2f7ff;
  border-radius: 8px;
  color: var(--brand-strong);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 8px;
  cursor: pointer;
}

.children {
  margin-top: 18px;
  display: flex;
  gap: 0;
  position: relative;
  padding-top: 18px;
  justify-content: center;
}

.children::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 2px;
  height: 18px;
  background: var(--line);
  transform: translateX(-50%);
}

.child-item {
  position: relative;
  flex: 1 1 240px;
  padding: 14px 9px 0;
}

.child-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 2px;
  height: 14px;
  background: var(--line);
  transform: translateX(-50%);
}

.child-item::after {
  content: "";
  position: absolute;
  top: 0;
  left: -9px;
  width: calc(100% + 18px);
  height: 2px;
  background: var(--line);
}

.child-item:first-child::after {
  left: 50%;
  width: calc(50% + 9px);
}

.child-item:last-child::after {
  left: -9px;
  width: calc(50% + 9px);
}

.child-item:only-child::after {
  display: none;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 980px) {
  .control-grid {
    grid-template-columns: repeat(2, minmax(160px, 1fr));
  }

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

  .inline-toggle {
    margin-top: 0;
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .hero {
    flex-direction: column;
    align-items: flex-start;
  }

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

  .controls-row {
    flex-wrap: wrap;
  }

  .card {
    min-width: 190px;
  }
}