/* ------ Base ------ */
:root {
  --bg: #0d1117;
  --bg-alt: #0b0f14;
  --card: #161b22;
  --card-hover: #1c232c;
  --border: #30363d;
  --text: #c9d1d9;
  --muted: #6e7681;
  --accent: #58a6ff;
  --green: #3fb950;
  --amber: #d29922;
  --red: #f85149;
  --agent-davinci: #bc8cff;
  --agent-sherry: #f778ba;
  --agent-hal: #79c0ff;
  --shadow: 0 4px 14px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
  font-size: 14px;
  line-height: 1.4;
  min-height: 100vh;
}

.hidden { display: none !important; }

/* ------ Top Bar ------ */
.topbar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding: 14px 24px;
  background: linear-gradient(180deg, #141a22 0%, #0d1117 100%);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar-left { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.topbar-right { display: flex; justify-content: flex-end; }
.topbar-center { display: flex; align-items: center; gap: 14px; justify-content: center; }

.app-title {
  font-size: 18px;
  font-weight: 600;
  margin: 0;
  letter-spacing: 0.2px;
}
.app-sub { color: var(--muted); font-size: 12px; }

/* View toggle (Kanban / Gantt) */
.view-toggle {
  display: inline-flex;
  gap: 2px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
  margin-left: 8px;
}
.view-btn {
  text-decoration: none;
  color: var(--muted);
  padding: 5px 14px;
  font-size: 12px;
  font-weight: 500;
  border-radius: 999px;
  transition: background 0.15s, color 0.15s;
}
.view-btn:hover { color: var(--text); }
.view-btn.active {
  background: rgba(88,166,255,0.14);
  color: var(--accent);
}

/* Filter pills */
.filter-pills { display: flex; gap: 6px; }
.pill {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 12px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.pill:hover { background: var(--card-hover); }
.pill.active { border-color: var(--accent); background: rgba(88, 166, 255, 0.12); color: var(--accent); }
.pill-davinci.active { border-color: var(--agent-davinci); background: rgba(188,140,255,0.13); color: var(--agent-davinci); }
.pill-sherry.active  { border-color: var(--agent-sherry);  background: rgba(247,120,186,0.13); color: var(--agent-sherry); }
.pill-hal.active     { border-color: var(--agent-hal);     background: rgba(121,192,255,0.13); color: var(--agent-hal); }
.pill-done.active    { border-color: var(--green);         background: rgba(63,185,80,0.13);  color: var(--green); }

.project-filter {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
}

/* Buttons */
.btn-primary, .btn-ghost, .btn-danger {
  background: var(--accent);
  color: #0b0f14;
  border: 0;
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.05s;
}
.btn-primary:hover { opacity: 0.9; }
.btn-primary:active { transform: translateY(1px); }

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
  font-weight: 500;
}
.btn-ghost:hover { background: var(--card-hover); }

.btn-danger {
  background: var(--red);
  color: #fff;
}
.btn-danger:hover { opacity: 0.9; }

/* ------ Board ------ */
.board {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 16px;
  padding: 18px 20px 60px;
  min-height: calc(100vh - 62px);
  overflow-x: auto;
}

.agent-column {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.agent-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px 8px 0 0;
  border-bottom: 0;
  font-size: 13px;
}
.agent-header h2 {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  flex: 1;
}
.agent-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px currentColor;
}
.agent-davinci { color: var(--agent-davinci); }
.agent-davinci .agent-dot { background: var(--agent-davinci); color: var(--agent-davinci); }
.agent-sherry  { color: var(--agent-sherry); }
.agent-sherry .agent-dot { background: var(--agent-sherry); color: var(--agent-sherry); }
.agent-hal     { color: var(--agent-hal); }
.agent-hal .agent-dot { background: var(--agent-hal); color: var(--agent-hal); }
.agent-shared  { color: var(--amber); }
.agent-shared .agent-dot { background: var(--amber); color: var(--amber); }

.agent-count {
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  background: rgba(110,118,129,0.15);
  padding: 2px 8px;
  border-radius: 10px;
}

.sub-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding: 10px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-top: 0;
  border-radius: 0 0 8px 8px;
  flex: 1;
}
.shared-subs { grid-template-columns: 1fr; gap: 12px; }

.column {
  display: flex;
  flex-direction: column;
  background: rgba(110,118,129,0.05);
  border-radius: 6px;
  min-width: 0;
}

.col-head {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-radius: 6px 6px 0 0;
  border-bottom: 2px solid transparent;
}
.col-head span:first-child { flex: 1; }
.col-count {
  color: var(--muted);
  font-weight: 500;
  font-size: 11px;
  text-transform: none;
  letter-spacing: 0;
}

.col-head-coming   { color: var(--muted);  border-bottom-color: var(--border); }
.col-head-progress { color: var(--accent); border-bottom-color: var(--accent); }
.col-head-review   { color: var(--amber);  border-bottom-color: var(--amber); }
.col-head-done     { color: var(--green);  border-bottom-color: var(--green); }

.done-toggle {
  background: transparent;
  color: inherit;
  border: 0;
  cursor: pointer;
  font-size: 14px;
  padding: 0 4px;
  transition: transform 0.2s;
}
.done-column.collapsed .done-toggle { transform: rotate(-90deg); }
.done-column.collapsed .card-list { display: none; }

.card-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 10px;
  min-height: 40px;
  max-height: calc(100vh - 240px);
  overflow-y: auto;
}
.card-list::-webkit-scrollbar { width: 6px; }
.card-list::-webkit-scrollbar-track { background: transparent; }
.card-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ------ Card ------ */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px 0;
  cursor: grab;
  transition: background 0.15s, border-color 0.15s, transform 0.05s;
  position: relative;
  overflow: hidden;
}
.card:hover { background: var(--card-hover); border-color: #3d444d; }
.card:active { cursor: grabbing; }
.card.sortable-ghost { opacity: 0.4; }
.card.sortable-drag { box-shadow: var(--shadow); transform: rotate(2deg); }

.card-top {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--muted);
}

.priority-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}
.priority-critical { background: var(--red); box-shadow: 0 0 6px var(--red); }
.priority-high     { background: var(--amber); }
.priority-medium   { background: var(--accent); }
.priority-low      { background: var(--muted); }

.card-agent-label {
  font-weight: 600;
  margin-left: auto;
  font-size: 10px;
}
.card-agent-davinci { color: var(--agent-davinci); }
.card-agent-sherry  { color: var(--agent-sherry); }
.card-agent-hal     { color: var(--agent-hal); }

.card-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  margin: 0 0 6px;
  line-height: 1.35;
  word-break: break-word;
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
  font-size: 11px;
  color: var(--muted);
  margin-bottom: 6px;
}
.card-project {
  background: rgba(88,166,255,0.1);
  color: var(--accent);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 10px;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 8px;
}
.tag {
  background: rgba(110,118,129,0.18);
  color: var(--muted);
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 10px;
}

.card-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  color: var(--muted);
  padding-top: 4px;
}
.card-foot .due.overdue { color: var(--red); font-weight: 600; }
.card-foot .due.soon { color: var(--amber); }

.progress-bar {
  height: 3px;
  background: rgba(110,118,129,0.2);
  border-radius: 0 0 6px 6px;
  margin: 8px -12px 0;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: var(--accent);
  transition: width 0.3s ease;
}
.card[data-progress="100"] .progress-bar-fill { background: var(--green); }

.card.done .card-title {
  text-decoration: line-through;
  color: var(--muted);
}

/* Empty state */
.empty-col {
  padding: 16px 8px;
  text-align: center;
  color: var(--muted);
  font-size: 11px;
  font-style: italic;
}

/* ------ Modal ------ */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(1, 4, 9, 0.75);
  z-index: 1000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 60px 20px 20px;
  backdrop-filter: blur(4px);
}

.modal {
  width: 100%;
  max-width: 560px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  max-height: calc(100vh - 80px);
  display: flex;
  flex-direction: column;
}

.modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}
.modal-head h3 { margin: 0; font-size: 15px; font-weight: 600; }
.modal-close {
  background: transparent;
  border: 0;
  color: var(--muted);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  padding: 2px 6px;
}
.modal-close:hover { color: var(--text); }

.modal-body {
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
}

.field { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--muted); }
.field span { font-weight: 500; }
.field input[type="text"],
.field input[type="date"],
.field select,
.field textarea {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 8px 10px;
  font-size: 13px;
  font-family: inherit;
  resize: vertical;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 0;
  border-color: var(--accent);
}
.field-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; }

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

.modal-foot {
  display: flex;
  justify-content: space-between;
  padding: 12px 18px;
  border-top: 1px solid var(--border);
  gap: 8px;
}
.foot-right { display: flex; gap: 8px; }

/* ------ Toast ------ */
.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 10px 16px;
  border-radius: 6px;
  box-shadow: var(--shadow);
  font-size: 13px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.25s, transform 0.25s;
  pointer-events: none;
  z-index: 2000;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.error { border-color: var(--red); color: var(--red); }

/* ------ Hidden agent filter ------ */
.board.filter-davinci .agent-column:not([data-agent="davinci"]):not([data-agent="shared"]) { display: none; }
.board.filter-davinci { grid-template-columns: 2fr 1fr; }
.board.filter-sherry .agent-column:not([data-agent="sherry"]):not([data-agent="shared"])   { display: none; }
.board.filter-sherry { grid-template-columns: 2fr 1fr; }
.board.filter-hal .agent-column:not([data-agent="hal"]):not([data-agent="shared"])         { display: none; }
.board.filter-hal { grid-template-columns: 2fr 1fr; }
.board.filter-done-only .agent-column:not([data-agent="shared"]) { display: none; }
.board.filter-done-only { grid-template-columns: 1fr; }

/* ------ Responsive ------ */
@media (max-width: 1200px) {
  .board { grid-template-columns: repeat(4, minmax(280px, 1fr)); }
}

@media (max-width: 900px) {
  .topbar {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .topbar-center { justify-content: flex-start; flex-wrap: wrap; }
  .topbar-right { justify-content: flex-start; }
  .board { grid-template-columns: repeat(4, minmax(260px, 1fr)); overflow-x: auto; }
  .field-row { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .board { grid-template-columns: 1fr; padding: 12px; }
  .sub-columns { grid-template-columns: 1fr; }
  .agent-column { display: none; }
  .board.mobile-davinci .agent-column[data-agent="davinci"],
  .board.mobile-sherry  .agent-column[data-agent="sherry"],
  .board.mobile-hal     .agent-column[data-agent="hal"],
  .board.mobile-shared  .agent-column[data-agent="shared"] { display: flex; }
}