#arc-timeline {
  max-width: 900px;
  margin: 24px auto;
  padding: 24px;
  border: 1px solid #e3e8e8;
  border-radius: 14px;
  background: #f8fafa;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: #1a2424;
}
#arc-timeline *, #arc-timeline *:before, #arc-timeline *:after { box-sizing: border-box; }

.arc-tl-loading, .arc-tl-err { padding: 20px; text-align: center; color: #4b5563; }

.arc-tl-head { margin-bottom: 20px; }
.arc-tl-title { font-size: 1.5rem; font-weight: 700; color: #0b6b57; margin-bottom: 6px; }
.arc-tl-sub { font-size: 0.95rem; color: #4b5563; line-height: 1.5; }

.arc-tl-form label, .arc-tl-meta label {
  display: block; margin-bottom: 14px; font-size: 0.9rem; font-weight: 600; color: #0b6b57;
}
.arc-tl-form input[type="email"],
.arc-tl-form input[type="text"],
.arc-tl-form input[type="date"],
.arc-tl-form select,
.arc-tl-meta input[type="text"],
.arc-tl-meta input[type="date"] {
  display: block; width: 100%; margin-top: 6px; padding: 10px 12px;
  border: 1px solid #cfe0db; border-radius: 8px; background: #fff;
  font-family: inherit; font-size: 0.95rem; color: #1a2424;
}
.arc-tl-form input:focus, .arc-tl-form select:focus, .arc-tl-meta input:focus {
  outline: none; border-color: #0b6b57; box-shadow: 0 0 0 2px rgba(11, 107, 87, 0.15);
}

.arc-tl-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 640px) { .arc-tl-row { grid-template-columns: 1fr; } }

.arc-tl-submit, .arc-tl-save {
  display: inline-block; padding: 12px 24px; background: #0b6b57; color: #fff;
  border: none; border-radius: 8px; font-family: inherit; font-size: 1rem; font-weight: 600;
  cursor: pointer; transition: background 0.15s;
}
.arc-tl-submit:hover, .arc-tl-save:hover:not(:disabled) { background: #094f42; }
.arc-tl-submit:disabled, .arc-tl-save:disabled { opacity: 0.6; cursor: not-allowed; }

.arc-tl-msg { margin-top: 12px; font-size: 0.9rem; min-height: 20px; }
.arc-tl-msg.ok { color: #059669; font-weight: 600; }
.arc-tl-msg.err { color: #dc2626; }

.arc-tl-meta { background: #fff; padding: 16px; border-radius: 10px; margin-bottom: 20px; border: 1px solid #e3e8e8; }

.arc-tl-stages { display: flex; flex-direction: column; gap: 12px; }
.arc-tl-stage {
  background: #fff; border: 1px solid #e3e8e8; border-radius: 10px; padding: 16px;
  transition: opacity 0.2s;
}
.arc-tl-stage.done { opacity: 0.55; background: #f4f8f7; }
.arc-tl-stage.done .arc-tl-stage-head strong { text-decoration: line-through; }

.arc-tl-stage-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; flex-wrap: wrap; margin-bottom: 8px;
}
.arc-tl-stage-toggle { display: flex; align-items: center; gap: 8px; margin: 0; font-weight: 700; color: #0b6b57; }
.arc-tl-stage-toggle input { transform: scale(1.2); margin: 0; }
.arc-tl-date { padding: 6px 10px !important; font-size: 0.85rem !important; width: auto !important; margin: 0 !important; }
.arc-tl-summary { font-size: 0.9rem; color: #4b5563; margin-bottom: 12px; line-height: 1.4; }
.arc-tl-tasks { display: flex; flex-direction: column; gap: 6px; }
.arc-tl-task {
  display: flex; align-items: flex-start; gap: 8px; margin: 0 !important;
  padding: 6px 8px; border-radius: 6px; font-size: 0.9rem; font-weight: 400 !important;
  color: #374151 !important; cursor: pointer; transition: background 0.15s;
}
.arc-tl-task:hover { background: #f4f8f7; }
.arc-tl-task input { margin: 3px 0 0 0; }

.arc-tl-actions {
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
  margin-top: 20px; padding-top: 16px; border-top: 1px solid #e3e8e8;
}
.arc-tl-unsub { color: #6b7280; font-size: 0.85rem; text-decoration: none; }
.arc-tl-unsub:hover { color: #dc2626; text-decoration: underline; }

.arc-tl-hint { margin-top: 12px; font-size: 0.85rem; color: #6b7280; text-align: center; }