:root {
  --bg: #0c0e14;
  --bg-grid: #131722;
  --surface: #181c28;
  --surface-2: #1f2433;
  --border: #2a3043;
  --text: #e6e8ef;
  --muted: #8a90a3;
  --accent: #7c9eff;
  --accent-hover: #94afff;
  --accent-soft: rgba(124, 158, 255, 0.18);
  --danger: #ff6b81;
  --link: #4a5273;
  --link-active: #7c9eff;
  --shadow: 0 8px 28px rgba(0, 0, 0, 0.45), 0 2px 6px rgba(0, 0, 0, 0.35);
  --tag-bg: rgba(124, 158, 255, 0.14);
  --tag-fg: #b6c6ff;

  --c-default: #2a3043;
  --c-blue:    #4a7cff;
  --c-green:   #4ac28a;
  --c-amber:   #e2b04a;
  --c-pink:    #ff7aa8;
  --c-purple:  #b483ff;

  --font: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Inter,
    Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bot: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

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

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
  -webkit-touch-callout: none;
}

/* Viewport */
#viewport {
  position: fixed;
  inset: 0;
  overflow: hidden;
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 1px 1px, var(--bg-grid) 1px, transparent 0);
  background-size: 24px 24px;
  background-position: 0 0;
  cursor: grab;
  touch-action: none;
}
#viewport.panning { cursor: grabbing; }
#viewport.linking { cursor: crosshair; }

#world {
  position: absolute;
  top: 0; left: 0;
  width: 0; height: 0;
  transform-origin: 0 0;
  will-change: transform;
}

#links {
  position: absolute;
  overflow: visible;
  pointer-events: none;
  left: -10000px; top: -10000px;
  width: 20000px; height: 20000px;
}

#cards { position: absolute; left: 0; top: 0; }

/* Cards */
.card {
  position: absolute;
  width: 220px;
  min-height: 48px;
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--c-default);
  border-radius: 10px;
  box-shadow: var(--shadow);
  color: var(--text);
  line-height: 1.45;
  cursor: grab;
  transition: border-color 120ms ease, box-shadow 120ms ease, transform 120ms ease;
  word-wrap: break-word;
  overflow-wrap: anywhere;
  touch-action: none;
  -webkit-touch-callout: none;
}
.card:hover { border-color: #3a4360; }
.card.dragging {
  cursor: grabbing;
  box-shadow: 0 12px 32px rgba(0,0,0,0.55);
  transition: none;
  z-index: 5;
}
.card.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft), var(--shadow);
}
.card.dimmed { opacity: 0.22; }
.card.match  { border-color: var(--accent); }

.card--blue   { border-left-color: var(--c-blue); }
.card--green  { border-left-color: var(--c-green); }
.card--amber  { border-left-color: var(--c-amber); }
.card--pink   { border-left-color: var(--c-pink); }
.card--purple { border-left-color: var(--c-purple); }

.card .content {
  outline: none;
  white-space: pre-wrap;
  min-height: 1em;
  font-size: 13.5px;
}
.card .content[contenteditable="true"] {
  cursor: text;
  user-select: text;
  -webkit-user-select: text;
  -webkit-touch-callout: default;
}
.card .content a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
}

.tag {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 999px;
  background: var(--tag-bg);
  color: var(--tag-fg);
  font-size: 11px;
  font-family: var(--mono);
}

.card .link-handle,
.card .delete {
  position: absolute;
  width: 16px; height: 16px;
  border-radius: 50%;
  border: 2px solid var(--bg);
  padding: 0;
  cursor: pointer;
  opacity: 0;
  transition: opacity 120ms ease, transform 120ms ease;
  touch-action: none;
}
.card .link-handle { top: -8px; right: -8px; background: var(--accent); cursor: crosshair; }
.card .delete      { top: -8px; left:  -8px; background: var(--danger); }
.card:hover .link-handle, .card.selected .link-handle,
.card:hover .delete,      .card.selected .delete { opacity: 1; }

/* SVG links */
#links line {
  stroke: var(--link);
  stroke-width: 1.5;
  stroke-linecap: round;
  transition: stroke 160ms ease;
}
#links line.related { stroke: var(--link-active); stroke-opacity: 0.85; }

/* Top bar */
#topbar {
  position: fixed;
  top: calc(12px + var(--safe-top));
  left: calc(12px + var(--safe-left));
  right: calc(12px + var(--safe-right));
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 10px;
  background: rgba(20, 24, 36, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-radius: 12px;
  z-index: 20;
  box-shadow: var(--shadow);
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 6px;
  font-weight: 600;
  letter-spacing: 0.2px;
}
.brand .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); }

.search-wrap { flex: 1; min-width: 0; }
#search {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid transparent;
  color: var(--text);
  padding: 8px 10px;
  border-radius: 8px;
  font: inherit;
  outline: none;
  transition: border-color 120ms ease;
}
#search:focus { border-color: var(--accent); }
#search::placeholder { color: var(--muted); }

.actions { display: flex; gap: 6px; flex-shrink: 0; align-items: center; }
.actions button {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: 8px;
  font: inherit;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease, color 120ms ease, transform 80ms ease;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
}
.actions button:hover { background: #262c40; border-color: #3a4360; }
.actions button:active { transform: scale(0.96); }
.actions button.active { background: var(--accent); color: #0c0e14; border-color: var(--accent); }
.actions button.danger:hover { color: var(--danger); border-color: var(--danger); }

.actions button.primary {
  background: var(--accent);
  color: #0c0e14;
  border-color: var(--accent);
  font-weight: 600;
}
.actions button.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }

.actions button.icon {
  width: 34px;
  padding: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-soft);
  border-color: transparent;
}
.actions button.icon:hover { background: var(--accent); color: #0c0e14; }

/* Mini-map */
#minimap {
  position: fixed;
  right: calc(12px + var(--safe-right));
  bottom: calc(46px + var(--safe-bot));
  width: 200px;
  height: 120px;
  background: rgba(20, 24, 36, 0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  z-index: 15;
  cursor: crosshair;
  touch-action: none;
}

/* Color palette popover */
#palette {
  position: fixed;
  display: flex;
  gap: 8px;
  padding: 7px;
  background: rgba(20, 24, 36, 0.94);
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: var(--shadow);
  z-index: 30;
}
#palette .swatch {
  width: 26px; height: 26px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  padding: 0;
  transition: transform 100ms ease, border-color 100ms ease;
}
#palette .swatch:hover { transform: scale(1.12); }
#palette .swatch.active { border-color: var(--text); }
#palette .swatch[data-color="default"] { background: var(--c-default); }
#palette .swatch[data-color="blue"]    { background: var(--c-blue); }
#palette .swatch[data-color="green"]   { background: var(--c-green); }
#palette .swatch[data-color="amber"]   { background: var(--c-amber); }
#palette .swatch[data-color="pink"]    { background: var(--c-pink); }
#palette .swatch[data-color="purple"]  { background: var(--c-purple); }

/* Banner */
#banner {
  position: fixed;
  top: calc(72px + var(--safe-top));
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px 8px 14px;
  background: rgba(20, 24, 36, 0.94);
  border: 1px solid var(--accent);
  border-radius: 10px;
  z-index: 25;
  box-shadow: var(--shadow);
  font-size: 13px;
  max-width: calc(100vw - 24px);
}
#banner-action {
  background: var(--accent);
  color: #0c0e14;
  border: none;
  padding: 6px 12px;
  border-radius: 6px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
#banner-dismiss {
  background: transparent;
  color: var(--muted);
  border: none;
  font-size: 20px;
  line-height: 1;
  padding: 0 4px;
  cursor: pointer;
}
#banner-dismiss:hover { color: var(--text); }

/* Toast */
#toast {
  position: fixed;
  bottom: calc(60px + var(--safe-bot));
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(20, 24, 36, 0.95);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 14px;
  z-index: 40;
  font-size: 13px;
  opacity: 0;
  transition: opacity 180ms ease, transform 180ms ease;
  box-shadow: var(--shadow);
  pointer-events: none;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
#toast.with-action { pointer-events: auto; }
.toast-action {
  background: var(--accent);
  color: #0c0e14;
  border: none;
  padding: 5px 12px;
  border-radius: 6px;
  font: inherit;
  font-weight: 700;
  font-size: 12px;
  cursor: pointer;
  letter-spacing: 0.02em;
}
.toast-action:hover { background: var(--accent-hover); }

/* Status bar */
#statusbar {
  position: fixed;
  bottom: calc(10px + var(--safe-bot));
  left: calc(12px + var(--safe-left));
  right: calc(12px + var(--safe-right));
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  font-size: 12px;
  color: var(--muted);
  background: rgba(20, 24, 36, 0.6);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 10px;
  z-index: 10;
  pointer-events: none;
}
#statusbar .sep { opacity: 0.5; }
#status-save { margin-left: auto; font-family: var(--mono); }
#status-save.saving { color: var(--accent); }

/* [hidden] needs to beat the ID-level display rules below */
#onboarding[hidden],
#banner[hidden],
#palette[hidden],
#toast[hidden] { display: none !important; }

/* Onboarding modal */
#onboarding {
  position: fixed;
  inset: 0;
  background: rgba(6, 8, 14, 0.78);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  padding-top: calc(16px + var(--safe-top));
  padding-bottom: calc(16px + var(--safe-bot));
  overflow-y: auto;
}
.onboarding-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 26px 22px;
  max-width: 460px;
  width: 100%;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  animation: pop 220ms ease-out;
}
@keyframes pop {
  from { transform: scale(0.94); opacity: 0; }
  to   { transform: scale(1);    opacity: 1; }
}
.onboarding-logo {
  font-size: 36px;
  color: var(--accent);
  text-align: center;
  line-height: 1;
  margin-bottom: 10px;
  text-shadow: 0 0 24px var(--accent-soft);
}
.onboarding-card h2 {
  margin: 0 0 4px;
  text-align: center;
  font-size: 22px;
  letter-spacing: -0.01em;
}
.onboarding-sub {
  text-align: center;
  color: var(--muted);
  margin: 0 0 22px;
  font-size: 14px;
}
.onboarding-steps {
  list-style: none;
  padding: 0;
  margin: 0 0 22px;
  counter-reset: step;
}
.onboarding-steps li {
  position: relative;
  padding: 10px 0 10px 40px;
  counter-increment: step;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
}
.onboarding-steps li + li { border-top: 1px solid rgba(255,255,255,0.04); }
.onboarding-steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 11px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-family: var(--mono);
  font-size: 12px;
}
.onboarding-steps li em {
  font-style: normal;
  background: var(--surface-2);
  padding: 1px 6px;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
}
#onboarding-go {
  display: block;
  width: 100%;
  background: var(--accent);
  color: #0c0e14;
  border: none;
  padding: 13px;
  border-radius: 10px;
  font: inherit;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  margin-bottom: 6px;
  transition: background 120ms ease;
}
#onboarding-go:hover { background: var(--accent-hover); }
#onboarding-skip {
  display: block;
  margin: 0 auto;
  background: none;
  border: none;
  color: var(--muted);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  padding: 8px;
}
#onboarding-skip:hover { color: var(--text); }

/* Mobile / phone */
@media (max-width: 720px) {
  .brand-name { display: none; }
  #status-hint { display: none; }
  .actions button.more { display: none; }
  #minimap { width: 140px; height: 90px; right: 8px; bottom: calc(40px + var(--safe-bot)); }
  #statusbar { left: 8px; right: 8px; padding: 5px 10px; }
  #topbar { left: 8px; right: 8px; gap: 8px; }
  .actions button { padding: 7px 10px; }
}

@media (max-width: 420px) {
  #minimap { display: none; }
  .actions button#btn-fit { display: none; }
}

/* Tablet & touch-primary devices — bigger targets, always-visible affordances */
@media (pointer: coarse) {
  .card { padding: 14px 16px; }
  .card .content { font-size: 14.5px; }
  .card .link-handle, .card .delete {
    width: 22px; height: 22px;
    opacity: 1;  /* always visible on touch — discoverability matters */
  }
  .card .link-handle { top: -11px; right: -11px; }
  .card .delete      { top: -11px; left:  -11px; }

  .actions button { padding: 10px 14px; font-size: 14px; }
  .actions button.icon { width: 40px; height: 40px; font-size: 18px; }
  #palette { padding: 8px; gap: 10px; }
  #palette .swatch { width: 30px; height: 30px; }
  #search { padding: 10px 12px; font-size: 15px; }
  #topbar { padding: 9px 10px; }

  #status-hint { display: none; }
}

/* iPad in landscape gets the full bar */
@media (min-width: 740px) and (pointer: coarse) {
  .brand-name { display: inline; }
  #status-hint { display: inline; }
}