/* Slate — base: tokens, layout, topbar, canvas, boards */

:root {
  --bg: #F5F6F8;
  --dot: #D8DCE3;
  --ink: #1B2230;
  --ink-2: #5C6470;
  --ink-3: #9AA1AC;
  --surface: #FFFFFF;
  --tray: rgba(255, 255, 255, 0.62);
  --line: rgba(27, 34, 48, 0.09);
  --line-strong: rgba(27, 34, 48, 0.16);
  --accent: #3A5BF0;
  --accent-ink: #FFFFFF;
  --accent-soft: rgba(58, 91, 240, 0.09);
  --danger: #D14D4D;
  --hover: rgba(27, 34, 48, 0.05);
  --shadow-card: 0 1px 2px rgba(27, 34, 48, 0.07), 0 1px 1px rgba(27, 34, 48, 0.04);
  --shadow-card-hover: 0 3px 10px -2px rgba(27, 34, 48, 0.13), 0 1px 2px rgba(27, 34, 48, 0.06);
  --shadow-board: 0 12px 32px -16px rgba(27, 34, 48, 0.22), 0 2px 8px -2px rgba(27, 34, 48, 0.07);
  --shadow-pop: 0 16px 48px -12px rgba(27, 34, 48, 0.28), 0 3px 10px -2px rgba(27, 34, 48, 0.1);
  --toast-bg: #23293A;
  --toast-ink: #F2F4F8;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Inter", "Helvetica Neue", sans-serif;
  --mono: ui-monospace, "SF Mono", "Menlo", "Cascadia Mono", monospace;
}
[data-theme="dark"] {
  --bg: #0F1216;
  --dot: #262C35;
  --ink: #E7EAF0;
  --ink-2: #9AA3B0;
  --ink-3: #636C79;
  --surface: #1B212A;
  --tray: rgba(22, 26, 33, 0.62);
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --accent: #6D87FF;
  --accent-ink: #0F1216;
  --accent-soft: rgba(109, 135, 255, 0.13);
  --danger: #E36868;
  --hover: rgba(255, 255, 255, 0.06);
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.28), 0 1px 1px rgba(0, 0, 0, 0.18);
  --shadow-card-hover: 0 4px 12px -2px rgba(0, 0, 0, 0.45), 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-board: 0 14px 36px -16px rgba(0, 0, 0, 0.6), 0 2px 8px -2px rgba(0, 0, 0, 0.35);
  --shadow-pop: 0 16px 48px -12px rgba(0, 0, 0, 0.65), 0 3px 10px -2px rgba(0, 0, 0, 0.4);
  --toast-bg: #E7EAF0;
  --toast-ink: #1B2230;
}

/* card tints: --t-bar (edge), --t-bg (card wash), --t-text (chip ink) */
.tint-c1 { --t-bar: #E05D77; --t-bg: #FCF0F2; --t-text: #AD3B55; }
.tint-c2 { --t-bar: #E5764C; --t-bg: #FCF2ED; --t-text: #B14E28; }
.tint-c3 { --t-bar: #DFA43F; --t-bg: #FBF5E8; --t-text: #8F6A1E; }
.tint-c4 { --t-bar: #6FA85E; --t-bg: #F1F7EE; --t-text: #497C3A; }
.tint-c5 { --t-bar: #41A69F; --t-bg: #ECF6F5; --t-text: #2A7B75; }
.tint-c6 { --t-bar: #4C8FDE; --t-bg: #EEF5FC; --t-text: #2F6BB2; }
.tint-c7 { --t-bar: #7B6DE9; --t-bg: #F3F1FD; --t-text: #5A4BC5; }
.tint-c8 { --t-bar: #B562B0; --t-bg: #F9F0F9; --t-text: #8E4589; }
[data-theme="dark"] .tint-c1 { --t-bg: rgba(224, 93, 119, 0.15); --t-text: #F095A8; }
[data-theme="dark"] .tint-c2 { --t-bg: rgba(229, 118, 76, 0.15); --t-text: #F0A183; }
[data-theme="dark"] .tint-c3 { --t-bg: rgba(223, 164, 63, 0.14); --t-text: #E9C079; }
[data-theme="dark"] .tint-c4 { --t-bg: rgba(111, 168, 94, 0.15); --t-text: #A4CE96; }
[data-theme="dark"] .tint-c5 { --t-bg: rgba(65, 166, 159, 0.15); --t-text: #8BD0CB; }
[data-theme="dark"] .tint-c6 { --t-bg: rgba(76, 143, 222, 0.15); --t-text: #97BFEE; }
[data-theme="dark"] .tint-c7 { --t-bg: rgba(123, 109, 233, 0.16); --t-text: #B1A7F2; }
[data-theme="dark"] .tint-c8 { --t-bg: rgba(181, 98, 176, 0.16); --t-text: #D9A0D6; }

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: var(--font);
  font-size: 14px;
  color: var(--ink);
  background: var(--bg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
body.dragging-any, body.dragging-any * { cursor: grabbing !important; user-select: none; }

/* ---------- topbar ---------- */
#topbar {
  height: 52px;
  flex: 0 0 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px 0 16px;
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  z-index: 50;
}
.tb-left, .tb-right { display: flex; align-items: center; gap: 6px; }
.logo { display: flex; align-items: center; margin-right: 4px; }
.ws-switcher {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 9px;
  font-size: 15px;
  font-weight: 650;
  letter-spacing: -0.015em;
}
.ws-switcher:hover { background: var(--hover); }
.ws-switcher .chev { color: var(--ink-3); margin-top: 1px; flex-shrink: 0; }
.ws-name {
  display: block;
  max-width: 32vw;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.tb-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-2);
}
.tb-btn:hover { background: var(--hover); color: var(--ink); }
.tb-btn.icon-only { padding: 7px; }

/* segmented control (view switcher, brain tabs) */
.seg {
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--hover);
  border-radius: 9px;
  padding: 2.5px;
}
.seg-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4.5px 11px;
  border-radius: 7px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink-2);
  transition: color 120ms ease, background 120ms ease;
}
.seg-btn svg { opacity: 0.75; }
.seg-btn:hover { color: var(--ink); }
.seg-btn.active {
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-card);
}
.seg-btn.active svg { opacity: 1; color: var(--accent); }

/* ---------- canvas ---------- */
#viewport {
  flex: 1;
  overflow: auto;
  position: relative;
}
#viewport.panning { cursor: grabbing; }
#canvas {
  position: relative;
  background-image: radial-gradient(var(--dot) 1.1px, transparent 1.1px);
  background-size: 22px 22px;
  cursor: default;
}
.canvas-hint {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  color: var(--ink-3);
  font-size: 13.5px;
  letter-spacing: 0.01em;
  pointer-events: none;
  z-index: 5;
}

/* ---------- board ---------- */
.board {
  position: absolute;
  width: 300px;
  display: flex;
  flex-direction: column;
  max-height: min(72vh, 640px);
  background: var(--tray);
  -webkit-backdrop-filter: blur(12px) saturate(1.15);
  backdrop-filter: blur(12px) saturate(1.15);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow-board);
}
.board-enter { animation: board-in 240ms cubic-bezier(0.2, 0.8, 0.3, 1); }
@keyframes board-in {
  from { opacity: 0; transform: scale(0.95) translateY(4px); }
  to { opacity: 1; transform: none; }
}
.board.tidying { transition: left 400ms cubic-bezier(0.25, 0.8, 0.3, 1), top 400ms cubic-bezier(0.25, 0.8, 0.3, 1); }
.board.board-dragging {
  box-shadow: 0 24px 56px -20px rgba(27, 34, 48, 0.38), 0 4px 14px -4px rgba(27, 34, 48, 0.14);
  transform: scale(1.012);
}
[data-theme="dark"] .board.board-dragging {
  box-shadow: 0 24px 56px -18px rgba(0, 0, 0, 0.75), 0 4px 14px -4px rgba(0, 0, 0, 0.4);
}

.board-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 10px 7px 14px;
  cursor: grab;
  user-select: none;
}
.board-title {
  font-size: 14px;
  font-weight: 650;
  letter-spacing: -0.012em;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.board-title-input {
  flex: 1;
  min-width: 0;
  font-size: 14px;
  font-weight: 650;
  letter-spacing: -0.012em;
  border: none;
  background: var(--surface);
  border-radius: 6px;
  padding: 2px 6px;
  margin-left: -6px;
  box-shadow: 0 0 0 2px var(--accent);
}
.board-title-input:focus { outline: none; }
.board-count {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-3);
  background: var(--hover);
  padding: 2px 7px;
  border-radius: 99px;
}
.board-menu-btn { color: var(--ink-3); border-radius: 6px; padding: 4px; }
.board-menu-btn:hover { background: var(--hover); color: var(--ink); }
.board-collapse-btn { color: var(--ink-3); border-radius: 6px; padding: 4px; }
.board-collapse-btn:hover { background: var(--hover); color: var(--ink); }
.board-collapse-btn svg { transition: transform 160ms cubic-bezier(0.2, 0.8, 0.3, 1); }
.board-collapse-btn.is-collapsed svg { transform: rotate(-90deg); }

/* collapsed board: header only */
.board.collapsed { max-height: none; }
.board.collapsed .board-head { padding-bottom: 11px; }

/* optional accent color: a thin stripe across the board's top edge.
   inset by -1px so it sits flush over the 1px border, and the outer 14px
   radius so its corners line up with the board's rounded corners */
.board.has-accent::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  height: 4px;
  background: var(--t-bar);
  border-radius: 14px 14px 0 0;
  pointer-events: none;
}
.board.has-accent .board-head { padding-top: 13px; }

/* ---------- board resize handles (right edge / bottom edge / corner) ---------- */
.board-resize { position: absolute; z-index: 6; touch-action: none; }
.board-resize-e  { top: 14px; bottom: 14px; right: -4px; width: 10px; cursor: ew-resize; }
.board-resize-s  { left: 14px; right: 14px; bottom: -4px; height: 10px; cursor: ns-resize; }
.board-resize-se { right: -4px; bottom: -4px; width: 18px; height: 18px; cursor: nwse-resize; z-index: 7; }
.board-resize-e::after, .board-resize-s::after {
  content: ""; position: absolute; background: var(--line-strong);
  border-radius: 3px; opacity: 0; transition: opacity 130ms ease;
}
.board-resize-e::after { top: 50%; right: 4px; width: 3px; height: 30px; transform: translateY(-50%); }
.board-resize-s::after { left: 50%; bottom: 4px; height: 3px; width: 30px; transform: translateX(-50%); }
.board-resize-se::after {
  content: ""; position: absolute; right: 4px; bottom: 4px; width: 8px; height: 8px;
  border-right: 2px solid var(--line-strong); border-bottom: 2px solid var(--line-strong);
  border-bottom-right-radius: 3px; opacity: 0; transition: opacity 130ms ease;
}
.board:hover .board-resize-e::after, .board:hover .board-resize-s::after { opacity: 0.45; }
.board:hover .board-resize-se::after { opacity: 0.55; }
.board-resize-e:hover::after, .board-resize-s:hover::after,
.board.resizing .board-resize-e::after, .board.resizing .board-resize-s::after { opacity: 1; background: var(--accent); }
.board-resize-se:hover::after, .board.resizing .board-resize-se::after { opacity: 1; border-color: var(--accent); }
.board.resizing { user-select: none; }

.cards {
  flex: 1 1 auto;
  min-height: 4px;
  overflow-y: auto;
  padding: 2px 10px 2px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
}
.cards::-webkit-scrollbar { width: 8px; }
.cards::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 8px; border: 2px solid transparent; background-clip: content-box; }

.board-foot { padding: 6px 10px 10px; }
.add-card-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 8px;
  border-radius: 9px;
  color: var(--ink-3);
  font-size: 13px;
  font-weight: 500;
}
.add-card-btn:hover { background: var(--hover); color: var(--ink-2); }

/* viewport scrollbars */
#viewport::-webkit-scrollbar { width: 11px; height: 11px; }
#viewport::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 10px; border: 3px solid var(--bg); }
#viewport::-webkit-scrollbar-corner { background: transparent; }

/* ---------- touch ---------- */
/* manipulation: native pan + pinch stay, double-tap zoom goes (so dblclick works on touch) */
#viewport, #canvas { touch-action: manipulation; }
.board-head { touch-action: none; }   /* board drag wins immediately */
.card { touch-action: pan-y; }        /* lists scroll naturally; long-press lifts a card */

/* ---------- small screens ---------- */
@media (max-width: 700px) {
  #topbar { padding: 0 8px; }
  .tb-left, .tb-right { gap: 3px; }
  .logo { display: none; }
  #tidyBtn span { display: none; }
  .ws-switcher { font-size: 14px; padding: 6px 7px; }
  .ws-name { max-width: 26vw; }
  .seg-btn { padding: 4.5px 8px; font-size: 12px; }
  .canvas-hint { font-size: 12.5px; padding: 0 24px; text-align: center; width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}