@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --bg: #f5f5f7;
  --panel: #ffffff;
  --panel2: #f9f9f9;
  --border: #e5e5e5;
  --border2: #d0d0d0;
  --text: #1a1a1a;
  --text-muted: #999;
  --text-dim: #666;
  --accent: #1a1a1a;
  --accent2: #4f46e5;
  --me-color: #4f46e5;
  --sidebar-w: 300px;
  --radius: 14px;
  --radius-sm: 8px;
}

* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
  height: 100dvh;
  display: flex;
  user-select: none;
  -webkit-user-select: none;
}

/* ── SIDEBAR ── */
#sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 50;
  transition: transform .3s cubic-bezier(.4,0,.2,1);
  position: relative;
}

#sidebar.hidden {
  transform: translateX(-100%);
  position: absolute;
  top: 0; left: 0;
  height: 100%;
  box-shadow: 4px 0 40px rgba(0,0,0,.12);
}

#sidebar-header {
  padding: 20px 18px 14px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

#header-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

#sidebar-header h1 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text);
}

#sidebar-header p {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

#sidebar-toggle {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 16px;
  cursor: pointer;
  padding: 2px 4px;
  line-height: 1;
}

#hamburger {
  display: none;
  position: fixed;
  top: 14px;
  left: 14px;
  z-index: 100;
  background: var(--panel);
  border: 1px solid var(--border2);
  color: var(--text);
  font-size: 18px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 10px rgba(0,0,0,.1);
}

.sidebar-actions {
  display: flex;
  gap: 6px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: none;
  font-family: 'Inter', sans-serif;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}

.btn-primary {
  background: var(--text);
  color: #fff;
  flex: 1;
}
.btn-primary:hover, .btn-primary:active { background: #333; }

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border2);
  color: var(--text);
}
.btn-ghost:hover, .btn-ghost:active { background: var(--bg); }

.btn-accent {
  background: #ede9fe;
  color: #4f46e5;
  border: 1px solid #c4b5fd;
}
.btn-accent:hover { background: #ddd6fe; }

.btn-danger {
  background: #fef2f2;
  color: #dc2626;
  border: 1px solid #fecaca;
}
.btn-danger:hover { background: #fee2e2; }

.btn-sm { padding: 6px 10px; font-size: 11px; }

/* Legend */
#legend {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

#legend h3 {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 8px;
  font-weight: 600;
}

#legend-list {
  display: flex;
  flex-direction: column;
  gap: 5px;
  max-height: 120px;
  overflow-y: auto;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-dim);
}

.legend-swatch {
  width: 22px;
  height: 3px;
  border-radius: 2px;
  flex-shrink: 0;
}

/* People list */
#people-list-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#people-search-wrap {
  padding: 10px 14px 6px;
}

#people-search {
  width: 100%;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  padding: 8px 12px;
  outline: none;
  transition: border-color .15s;
}
#people-search:focus { border-color: var(--border2); }
#people-search::placeholder { color: var(--text-muted); }

#people-list {
  flex: 1;
  overflow-y: auto;
  padding: 6px 10px 10px;
}

.person-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background .12s;
  position: relative;
  border-left: 2px solid transparent;
}

.person-card:hover, .person-card:active { background: var(--panel2); }
.person-card.selected { background: var(--panel2); border-left-color: var(--me-color); }

.person-avatar-sm {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: #f0f0f0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  overflow: hidden;
  flex-shrink: 0;
  border: 1.5px solid var(--border2);
}

.person-avatar-sm img { width: 100%; height: 100%; object-fit: cover; }
.person-avatar-sm.is-me { border-color: var(--me-color); }

.person-info { flex: 1; min-width: 0; }
.person-name { font-size: 13px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.person-meta { font-size: 11px; color: var(--text-muted); margin-top: 1px; }

.person-actions { display: flex; gap: 4px; }
.person-actions .btn { padding: 4px 8px; font-size: 11px; }

#sidebar-footer {
  padding: 10px 14px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

/* ── CANVAS AREA ── */
#canvas-wrap {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: var(--bg);
}

#graph-canvas {
  position: absolute;
  top: 0; left: 0;
  touch-action: none;
}

#canvas-toolbar {
  position: absolute;
  top: 14px;
  right: 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  z-index: 5;
}

#canvas-toolbar button {
  width: 38px; height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border2);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,.08);
  transition: background .12s;
  font-family: 'Inter', sans-serif;
}

#canvas-toolbar button:hover { background: var(--panel2); }

/* ── MODAL ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.35);
  z-index: 200;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  backdrop-filter: blur(4px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .22s;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius) var(--radius) 0 0;
  padding: 24px 20px 32px;
  width: 100%;
  max-width: 500px;
  max-height: 92dvh;
  overflow-y: auto;
  box-shadow: 0 -8px 40px rgba(0,0,0,.12);
  transform: translateY(30px);
  transition: transform .22s cubic-bezier(.4,0,.2,1);
}

.modal-overlay.open .modal { transform: translateY(0); }

.modal h2 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: -0.2px;
}

.field { margin-bottom: 14px; }

.field label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .7px;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.field input[type=text], .field select, .field textarea, .field input[type=url] {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border2);
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  background: var(--panel);
  color: var(--text);
  transition: border-color .15s;
  outline: none;
  -webkit-appearance: none;
}

.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--me-color);
}

.field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23999' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-color: var(--panel);
  padding-right: 32px;
}

.field textarea { resize: vertical; min-height: 70px; }

.photo-upload-area {
  border: 2px dashed var(--border2);
  border-radius: var(--radius-sm);
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  position: relative;
}

.photo-upload-area:hover, .photo-upload-area:active {
  border-color: var(--me-color);
  background: #f5f3ff;
}

.photo-upload-area input[type=file] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
  border: none;
  background: none;
  padding: 0;
}

.photo-preview {
  width: 64px; height: 64px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 8px;
  display: block;
  border: 2px solid var(--me-color);
}

.modal-footer {
  display: flex;
  gap: 10px;
  margin-top: 20px;
  justify-content: flex-end;
}

.rel-select-wrap { position: relative; }
.rel-dot {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 10px; height: 10px;
  border-radius: 50%;
  pointer-events: none;
}
.rel-select-wrap select { padding-left: 30px; }

/* Social links */
.social-link-row {
  display: flex;
  gap: 6px;
  margin-bottom: 6px;
  align-items: center;
}

.social-link-row select {
  width: 120px;
  min-width: 100px;
  flex-shrink: 0;
}

.social-link-row input { flex: 1; }
.social-link-row .btn { padding: 8px; min-width: 34px; }

/* Context menus */
#ctx-menu, #edge-ctx-menu {
  position: fixed;
  background: var(--panel);
  border: 1px solid var(--border2);
  border-radius: var(--radius-sm);
  padding: 6px;
  min-width: 190px;
  box-shadow: 0 8px 30px rgba(0,0,0,.14);
  z-index: 300;
  display: none;
}

#ctx-menu.open, #edge-ctx-menu.open { display: block; }

.ctx-item {
  padding: 9px 12px;
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background .1s;
  font-weight: 500;
}

.ctx-item:hover, .ctx-item:active { background: var(--bg); }
.ctx-item.danger { color: #dc2626; }
.ctx-item.danger:hover { background: #fef2f2; }
.ctx-sep { height: 1px; background: var(--border); margin: 4px 0; }

/* Tooltip */
#node-tooltip {
  position: fixed;
  background: var(--text);
  color: #fff;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  pointer-events: none;
  z-index: 400;
  opacity: 0;
  transition: opacity .15s;
  max-width: 200px;
  line-height: 1.5;
  box-shadow: 0 4px 20px rgba(0,0,0,.2);
}

#node-tooltip.show { opacity: 1; }

/* Detail panel */
#detail-panel {
  position: absolute;
  bottom: 14px;
  right: 14px;
  width: 220px;
  background: var(--panel);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: 0 4px 24px rgba(0,0,0,.12);
  z-index: 10;
  display: none;
}

#detail-panel.open { display: block; }
#dp-close {
  position: absolute;
  top: 10px; right: 10px;
  background: none; border: none;
  color: var(--text-muted); font-size: 14px;
  cursor: pointer; padding: 2px;
}

.dp-avatar {
  width: 54px; height: 54px;
  border-radius: 50%;
  background: #f0f0f0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  overflow: hidden;
  margin: 0 auto 10px;
  border: 2px solid var(--border2);
}

.dp-avatar img { width: 100%; height: 100%; object-fit: cover; }
.dp-avatar.is-me { border-color: var(--me-color); }

.dp-name {
  font-size: 15px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 8px;
  letter-spacing: -0.2px;
}

.dp-field {
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 4px;
  display: flex;
  gap: 6px;
}

.dp-field a { color: var(--me-color); text-decoration: none; }

.dp-actions {
  display: flex;
  gap: 6px;
  margin-top: 12px;
}

/* Scrollbar */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }

.required-star { color: var(--me-color); margin-left: 2px; }

/* Mobile */
@media (max-width: 640px) {
  :root { --sidebar-w: 100vw; }

  #sidebar {
    position: fixed;
    top: 0; left: 0;
    height: 100%;
    transform: translateX(-100%);
    z-index: 90;
  }

  #sidebar.visible { transform: translateX(0); }

  #hamburger { display: flex; }

  #canvas-wrap { width: 100vw; }

  #detail-panel {
    bottom: 0; right: 0; left: 0;
    width: 100%;
    border-radius: var(--radius) var(--radius) 0 0;
    border-bottom: none;
  }
}

@media (min-width: 641px) {
  #sidebar { transform: none !important; position: relative; }
  #sidebar.hidden { display: none; }
  #hamburger { display: none !important; }

  .modal-overlay { align-items: center; }

  .modal {
    border-radius: var(--radius);
    max-height: 88dvh;
  }
}