/* ── Plan Detail Page ─────────────────────────────── */

.plan-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--color-border-subtle);
}

.plan-header .back-link {
    display: flex;
    align-items: center;
    color: var(--color-text-tertiary);
    font-size: 1.25rem;
}

.plan-header .back-link:hover {
    color: var(--color-text-brand);
}

.plan-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.plan-id {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    margin-left: auto;
}

/* ── Status Badge ────────────────────────────────── */

.plan-status-badge {
    display: inline-flex;
    align-items: center;
    height: 1.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius-sm);
    text-transform: uppercase;
}

.plan-status-badge.draft {
    background: var(--color-surface-draft);
    color: var(--color-text-draft);
}

.plan-status-badge.approved {
    background: var(--color-surface-closed);
    color: var(--color-text-closed);
}

.plan-status-badge.inProgress {
    background: rgba(255, 180, 50, 0.1);
    color: var(--color-feedback-warning-text);
}

.plan-status-badge.completed {
    background: var(--color-surface-open);
    color: var(--color-text-open);
}

.plan-status-badge.archived {
    background: var(--color-surface-mid);
    color: var(--color-text-quaternary);
}

/* ── Content Layout ──────────────────────────────── */

.plan-content {
    max-width: 52rem;
    margin: 0 auto;
    padding: 1.5rem;
}

.plan-section {
    margin-bottom: 1.5rem;
}

.plan-section h4 {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-quaternary);
    margin-bottom: 0.5rem;
}

.plan-desc {
    font-size: 0.875rem;
    line-height: 1.6;
}

/* ── Progress Bar ────────────────────────────────── */

.plan-progress {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.plan-progress-bar {
    flex: 1;
    height: 0.5rem;
    background: var(--color-surface-mid);
    border-radius: var(--border-radius-full);
    overflow: hidden;
}

.plan-progress-fill {
    height: 100%;
    border-radius: var(--border-radius-full);
    background: var(--color-text-open);
    transition: width 0.3s;
}

.plan-progress-text {
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
    white-space: nowrap;
}

/* ── Task List ───────────────────────────────────── */

.plan-task {
    display: flex;
    align-items: flex-start;
    gap: 0.625rem;
    padding: 0.625rem 0.75rem;
    background: var(--color-surface-subtle);
    border-radius: var(--border-radius-md);
    border-left: 3px solid var(--color-border-subtle);
    margin-bottom: 0.375rem;
}

.plan-task.done {
    border-left-color: var(--color-text-open);
}

.plan-task.blocked {
    border-left-color: var(--color-feedback-warning-text);
    opacity: 0.7;
}

.plan-task-icon {
    flex-shrink: 0;
    width: 1.125rem;
    height: 1.125rem;
    margin-top: 0.0625rem;
    font-size: 0.875rem;
    line-height: 1.125rem;
    text-align: center;
}

.plan-task.done .plan-task-icon {
    color: var(--color-text-open);
}

.plan-task:not(.done) .plan-task-icon {
    color: var(--color-text-quaternary);
}

.plan-task-body {
    flex: 1;
    min-width: 0;
}

.plan-task-subject {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    line-height: 1.4;
}

.plan-task.done .plan-task-subject {
    color: var(--color-text-tertiary);
}

.plan-task-detail {
    font-size: 0.6875rem;
    color: var(--color-text-quaternary);
    margin-top: 0.125rem;
    font-family: 'JetBrains Mono', monospace;
}

.plan-task-estimate {
    flex-shrink: 0;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6875rem;
    color: var(--color-text-quaternary);
    padding: 0.125rem 0.375rem;
    background: var(--color-surface-mid);
    border-radius: var(--border-radius-sm);
    margin-top: 0.0625rem;
}

/* ── Task Expand/Collapse ────────────────────────── */

.plan-task {
    cursor: pointer;
    transition: background-color 0.15s;
}

.plan-task:hover {
    background: var(--color-surface-mid);
}

.plan-task:focus-visible {
    outline: 2px solid var(--color-text-brand);
    outline-offset: -2px;
}

.plan-task-chevron {
    flex-shrink: 0;
    width: 1rem;
    font-size: 0.75rem;
    line-height: 1.125rem;
    color: var(--color-text-quaternary);
    transition: transform 0.2s ease;
    margin-top: 0.0625rem;
}

.plan-task[aria-expanded="true"] .plan-task-chevron {
    transform: rotate(90deg);
}

.plan-task[aria-expanded="true"] .plan-task-estimate {
    display: none;
}

.plan-task-details {
    display: none;
    margin-top: 0.625rem;
    padding-top: 0.625rem;
    border-top: 1px solid var(--color-border-subtle);
}

.plan-task[aria-expanded="true"] .plan-task-details {
    display: block;
    animation: taskDetailsIn 0.2s ease;
}

@keyframes taskDetailsIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

.plan-task-details-section {
    margin-bottom: 0.5rem;
}

.plan-task-details-section:last-child {
    margin-bottom: 0;
}

.plan-task-details-label {
    display: block;
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    color: var(--color-text-quaternary);
    margin-bottom: 0.25rem;
}

.plan-task-details-desc {
    font-size: 0.8125rem;
    line-height: 1.5;
    color: var(--color-text-secondary);
}

.plan-task-details-desc code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    background: var(--color-surface-mid);
    padding: 0.0625rem 0.25rem;
    border-radius: var(--border-radius-sm);
}

.plan-task-details-badge {
    display: inline-flex;
    align-items: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    padding: 0.125rem 0.5rem;
    background: var(--color-surface-mid);
    border-radius: var(--border-radius-sm);
    color: var(--color-text-tertiary);
}

.plan-task-file-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
}

.plan-task-file-chip {
    display: inline-flex;
    align-items: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6875rem;
    padding: 0.125rem 0.375rem;
    background: var(--color-surface-mid);
    border-radius: var(--border-radius-sm);
    color: var(--color-text-tertiary);
}

.plan-task-dep-list {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.plan-task-dep-chip {
    display: inline-flex;
    align-items: center;
    font-size: 0.75rem;
    padding: 0.125rem 0.375rem;
    background: var(--color-surface-mid);
    border-radius: var(--border-radius-sm);
    color: var(--color-text-tertiary);
}

.plan-task-dep-chip.done {
    color: var(--color-text-open);
}

.plan-task-status-indicator {
    display: inline-flex;
    align-items: center;
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.125rem 0.375rem;
    border-radius: var(--border-radius-sm);
}

.plan-task-status-indicator.done {
    color: var(--color-text-open);
    background: var(--color-surface-open);
}

.plan-task-status-indicator.blocked {
    color: var(--color-feedback-warning-text);
    background: rgba(255, 180, 50, 0.1);
}

.plan-task-status-indicator.pending {
    color: var(--color-text-quaternary);
    background: var(--color-surface-mid);
}

/* ── Related Links ───────────────────────────────── */

.plan-related-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.5rem;
    background: var(--color-surface-subtle);
    border-radius: var(--border-radius-md);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.25rem;
    text-decoration: none;
    transition: background-color 0.15s;
}

.plan-related-link:hover {
    background: var(--color-surface-mid);
}

.plan-related-dot {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    flex-shrink: 0;
}

.plan-related-id {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6875rem;
    color: var(--color-text-quaternary);
}

/* ── Metadata ────────────────────────────────────── */

.plan-meta {
    font-size: 0.75rem;
    color: var(--color-text-quaternary);
    display: flex;
    gap: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border-subtle);
}

.plan-meta code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6875rem;
}

/* ── Task Drill-down Plan Metadata ────────────────── */

.plan-task-details-meta {
    font-size: 0.75rem;
    color: var(--color-text-quaternary);
    display: flex;
    gap: 1rem;
    padding-top: 0.625rem;
    margin-top: 0.625rem;
    border-top: 1px solid var(--color-border-subtle);
}

.plan-task-details-meta code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6875rem;
}

/* ── Error ───────────────────────────────────────── */

.plan-error {
    padding: 2rem;
    text-align: center;
    color: var(--color-feedback-error-text);
    font-size: 0.875rem;
}

/* ── Board Card Badge ────────────────────────────── */

.plan-card-badge {
    display: inline-block;
    font-size: 0.625rem;
    font-weight: 600;
    padding: 0.0625rem 0.3125rem;
    border-radius: var(--border-radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    vertical-align: middle;
}

.plan-card-badge.draft {
    background: var(--color-surface-draft);
    color: var(--color-text-draft);
}

.plan-card-badge.approved {
    background: var(--color-surface-closed);
    color: var(--color-text-closed);
}

.plan-card-badge.inProgress {
    background: rgba(255, 180, 50, 0.1);
    color: var(--color-feedback-warning-text);
}

.plan-card-badge.completed {
    background: var(--color-surface-open);
    color: var(--color-text-open);
}

.plan-card-badge.archived {
    background: var(--color-surface-mid);
    color: var(--color-text-quaternary);
}

/* ── Plan Actions (approve button, status dropdown) ── */

.plan-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    max-width: 52rem;
    margin: 0 auto;
    padding: 1rem 1.5rem 0;
}

.plan-approve-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--border-radius-md);
    background: var(--color-text-open);
    color: #fff;
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.15s;
}

.plan-approve-btn:hover {
    opacity: 0.85;
}

.plan-approve-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.plan-status-select {
    padding: 0.375rem 0.5rem;
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--border-radius-md);
    background: var(--color-surface-subtle);
    color: var(--color-text-secondary);
    font-size: 0.8125rem;
    cursor: pointer;
}

.plan-status-select:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}