:root {
  --bg: #0f172a;
  --panel: #111827;
  --text: #f8fafc;
  --muted: #94a3b8;
  --line: #1f2937;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}

.topbar-left {
  min-width: 0;
}

.topbar h1 {
  margin: 0;
  font-size: 1.3rem;
}

.topbar p {
  margin: 6px 0 0;
  color: var(--muted);
}

.topbar-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}

.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 12px;
  padding: 12px;
  height: calc(100vh - 80px);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  overflow: auto;
}

h2,
h3 {
  margin: 0 0 10px;
}

.join-form {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}

.topbar-join-form {
  margin-bottom: 0;
}

#joinSection.hidden {
  display: none;
}

input,
button {
  border-radius: 8px;
  border: 1px solid #334155;
  background: #0b1220;
  color: #f8fafc;
  padding: 8px 10px;
}

button {
  cursor: pointer;
}

.primary {
  background: #2563eb;
}

.users-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.users-list button {
  width: 100%;
  text-align: left;
}

.users-list button.user-self {
  border-color: #60a5fa;
  box-shadow: inset 0 0 0 1px rgba(96, 165, 250, 0.45);
}

.muted {
  color: var(--muted);
  font-size: 0.9rem;
}

#saveStatus[data-tone="saving"] {
  color: #f59e0b;
}

#saveStatus[data-tone="saved"] {
  color: #22c55e;
}

#saveStatus[data-tone="error"] {
  color: #ef4444;
}

#saveStatus[data-tone="readonly"] {
  color: #93c5fd;
}

.board-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.task-bank {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.task-chip {
  padding: 8px 10px;
  border-radius: 999px;
  color: white;
  font-size: 0.85rem;
  user-select: none;
}

.timeline-wrapper {
  border: 1px solid #334155;
  border-radius: 10px;
  overflow: hidden;
}

.timeline-header,
.timeline-grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
}

.month-cell {
  border-right: 1px solid #1e293b;
  border-bottom: 1px solid #1e293b;
  min-height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: #cbd5e1;
  background: #0b1220;
}

.month-cell:last-child {
  border-right: none;
}

.timeline-grid {
  min-height: 620px;
  position: relative;
  background: linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: calc(100% / 10) 100%;
}

.timeline-item {
  position: absolute;
  top: 18px;
  height: 44px;
  border-radius: 8px;
  padding: 6px 8px;
  color: #fff;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  cursor: grab;
  user-select: none;
}

.timeline-item:active {
  cursor: grabbing;
}

.item-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.resize-handle {
  width: 10px;
  height: 100%;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.45);
  cursor: ew-resize;
  flex: 0 0 10px;
}

@media (max-width: 1200px) {
  .topbar {
    flex-direction: column;
    align-items: stretch;
  }

  .topbar-right {
    align-items: flex-start;
  }

  .layout {
    grid-template-columns: 1fr;
    height: auto;
  }
}