/* ── Checkpoint Timeline (Processes) ── */
.cp-track {
    overflow-x: auto;
    overflow-y: visible;
    padding: 8px 0 4px;
    margin-top: 8px;
    user-select: none;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
    -webkit-mask-image: linear-gradient(90deg, transparent 0px, #000 12px, #000 calc(100% - 12px), transparent 100%);
    mask-image: linear-gradient(90deg, transparent 0px, #000 12px, #000 calc(100% - 12px), transparent 100%);
    touch-action: pan-x; /* allow horizontal scroll, don't fight card swipe */
    cursor: grab;
}

.cp-track:active { cursor: grabbing; }

.cp-track::-webkit-scrollbar { height: 3px; }
.cp-track::-webkit-scrollbar-track { background: transparent; }
.cp-track::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.cp-row {
    display: flex;
    align-items: flex-start;
    gap: 0;
    position: relative;
    min-width: max-content;
    padding: 0 8px;
}

.cp-spine {
    position: absolute;
    top: 7px;
    left: calc(8px + 30px);
    right: calc(8px + 40px + 30px); /* skip add-btn width */
    height: 2px;
    background: var(--border);
    z-index: 0;
    border-radius: 1px;
}

.cp-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    position: relative;
    z-index: 1;
    width: 60px;
    flex-shrink: 0;
    cursor: pointer;
    transition: opacity 0.15s ease;
}

.cp-node:hover { opacity: 0.85; }

/* Quick-add checkpoint button at end of row */
.cp-add-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    position: relative;
    z-index: 1;
    width: 40px;
    flex-shrink: 0;
    cursor: pointer;
    transition: opacity 0.18s ease, transform 0.18s ease;
    opacity: 0.35;
    padding-top: 0;
}

.cp-add-btn:hover {
    opacity: 0.7;
    transform: scale(1.1);
}

.cp-add-btn:active {
    transform: scale(0.95);
}

.cp-add-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px dashed var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: border-color 0.15s ease, background 0.15s ease;
}

.cp-add-btn:hover .cp-add-dot {
    border-color: var(--accent);
    background: var(--accent-dim);
}

.cp-add-dot svg {
    color: var(--text-muted);
    transition: color 0.15s ease;
}

.cp-add-btn:hover .cp-add-dot svg {
    color: var(--accent);
}

.cp-add-label {
    font-family: var(--mono);
    font-size: 0.42rem;
    color: var(--text-muted);
    text-align: center;
    white-space: nowrap;
    transition: color 0.15s ease;
}

.cp-add-btn:hover .cp-add-label {
    color: var(--accent);
}

.cp-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--surface2);
    border: 2.5px solid var(--border);
    flex-shrink: 0;
    position: relative;
    z-index: 2;
    transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.cp-dot.active {
    background: var(--accent);
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-dim), 0 0 8px var(--accent-glow);
}

.cp-dot.completed {
    background: var(--accent);
    border-color: var(--accent);
    opacity: 0.55;
}

.cp-node:hover .cp-dot {
    transform: scale(1.4);
}

.cp-node.active .cp-dot::after {
    content: '';
    position: absolute;
    inset: -5px;
    border-radius: 50%;
    border: 1.5px solid var(--accent);
    opacity: 0.35;
    animation: pulse-ring 2.4s ease-in-out infinite;
}

.cp-stem {
    width: 1px;
    height: 10px;
    background: var(--border);
    opacity: 0.3;
    flex-shrink: 0;
}

.cp-stem.active {
    background: var(--accent);
    opacity: 0.4;
}

.cp-label {
    font-family: var(--mono);
    font-size: 0.48rem;
    color: var(--text-muted);
    text-align: center;
    max-width: 56px;
    line-height: 1.2;
    transition: color 0.15s ease;
    word-break: break-word;
}

.cp-node.active .cp-label {
    color: var(--accent);
    font-weight: 600;
}

.cp-node.completed .cp-label {
    color: var(--text-dim);
}

.cp-due {
    font-family: var(--mono);
    font-size: 0.42rem;
    color: var(--text-muted);
    margin-top: 1px;
}

.cp-due.overdue {
    color: var(--danger);
    font-weight: 600;
}

/* ── Stage detail in sheet ── */
.stage-detail-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 12px 0;
}

.stage-detail-form textarea {
    width: 100%;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-family: var(--mono);
    font-size: 0.85rem;
    padding: 10px 14px;
    outline: none;
    resize: vertical;
    min-height: 120px;
    transition: border-color var(--transition);
}

.stage-detail-form textarea:focus { border-color: var(--accent); }

/* Larger resize handle for touch targets */
.stage-detail-form textarea::-webkit-resizer {
    background: transparent;
    border-width: 0 0 12px 12px;
    border-style: solid;
    border-color: transparent transparent var(--border) transparent;
    cursor: ns-resize;
}

/* ── Tab content panels ── */
.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
}

/* ── Tag Input ── */
.tag-input-row {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 10px;
}

.tag-input-label {
    font-family: var(--mono);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-muted);
    flex-shrink: 0;
    width: 16px;
    text-align: center;
}

.tag-text-input {
    flex: 1;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-family: var(--mono);
    font-size: 0.78rem;
    padding: 8px 12px;
    outline: none;
    transition: border-color var(--transition);
    -webkit-appearance: none;
}

.tag-text-input::placeholder { color: var(--text-muted); }
.tag-text-input:focus { border-color: var(--accent); }

/* ── Entry Tag Chips ── */
.entry-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 4px;
}

.entry-tag-chip {
    font-family: var(--mono);
    font-size: 0.56rem;
    color: var(--accent);
    background: var(--accent-dim);
    border: 1px solid rgba(0, 229, 160, 0.25);
    border-radius: 4px;
    padding: 1px 6px;
    letter-spacing: 0.04em;
    white-space: nowrap;
}

/* ── Tag Filter Chips ── */
.filter-tag-chips {
    display: flex;
    gap: 6px;
    align-items: center;
    flex-wrap: wrap;
}

.filter-tag-chips:empty { display: none; }

.filter-tag-chips .filter-chip-label {
    font-family: var(--mono);
    font-size: 0.68rem;
    color: var(--text-muted);
    letter-spacing: 0.06em;
}

.filter-chip.tag-filter-chip {
    font-size: 0.65rem;
    padding: 2px 8px;
}

.filter-chip.tag-filter-chip.active {
    background: var(--accent-dim);
    border-color: rgba(0, 229, 160, 0.55);
    color: var(--accent);
}