/* Plane-inspired design tokens for Projects Module */
:root {
    --plane-bg-card: var(--mud-palette-surface);
    --plane-border-subtle: var(--mud-palette-lines-inputs);
    --plane-border-hover: var(--mud-palette-lines-default);
    --plane-text-primary: var(--mud-palette-text-primary);
    --plane-text-secondary: var(--mud-palette-text-secondary);
    --plane-text-tertiary: var(--mud-palette-text-disabled);
    --plane-accent: var(--mud-palette-primary);
    --plane-radius: 8px;
    --plane-shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --plane-shadow-md: 0 4px 16px rgba(0,0,0,0.12);
    --plane-shadow-card: 0 2px 12px rgba(0,0,0,0.06);
}

.mud-theme-dark {
    --plane-shadow-sm: 0 2px 8px rgba(0,0,0,0.35);
    --plane-shadow-md: 0 4px 16px rgba(0,0,0,0.45);
    --plane-shadow-card: 0 2px 12px rgba(0,0,0,0.35);
}

/* ─── Kanban Board ─── */
.kanban-board {
    gap: 16px;
    padding-bottom: 8px;
}

.kanban-column {
    min-width: 280px;
    max-width: 320px;
    flex: 1;
    background: color-mix(in srgb, var(--mud-palette-surface) 95%, var(--mud-palette-primary) 5%);
    border-radius: var(--plane-radius);
    border: 1px solid var(--plane-border-subtle);
    padding: 12px;
    transition: background 0.2s;
}

.mud-theme-dark .kanban-column {
    background: color-mix(in srgb, var(--mud-palette-surface) 85%, var(--mud-palette-primary) 15%);
}

.kanban-column-header {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--plane-border-subtle);
    margin-bottom: 12px;
}

.kanban-card {
    background: var(--plane-bg-card);
    border: 1px solid var(--plane-border-subtle);
    border-radius: var(--plane-radius);
    padding: 12px;
    cursor: grab;
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
    margin-bottom: 8px;
}

.kanban-card:hover {
    border-color: var(--plane-border-hover);
    box-shadow: var(--plane-shadow-sm);
}

.kanban-card:active {
    cursor: grabbing;
    box-shadow: var(--plane-shadow-md);
}

.kanban-card-title {
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.4;
    margin-bottom: 8px;
}

.kanban-dropzone {
    border: 2px dashed var(--plane-border-subtle);
    border-radius: var(--plane-radius);
    padding: 12px;
    text-align: center;
    margin-top: 8px;
    transition: border-color 0.2s, background 0.2s;
}

.kanban-dropzone:hover {
    border-color: var(--plane-accent);
    background: color-mix(in srgb, var(--mud-palette-primary) 5%, transparent);
}

/* ─── Project Card (List View) ─── */
.project-card {
    background: var(--plane-bg-card);
    border: 1px solid var(--plane-border-subtle);
    border-radius: var(--plane-radius);
    padding: 20px;
    transition: box-shadow 0.2s, border-color 0.2s;
}

.project-card:hover {
    border-color: var(--plane-border-hover);
    box-shadow: var(--plane-shadow-card);
}

.project-card-identifier {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 2px 8px;
    border-radius: 4px;
    background: color-mix(in srgb, var(--mud-palette-primary) 10%, transparent);
    color: var(--plane-accent);
}

/* ─── Issue List ─── */
.issue-row {
    border-bottom: 1px solid var(--plane-border-subtle);
    padding: 10px 16px;
    transition: background 0.15s;
}

.issue-row:hover {
    background: color-mix(in srgb, var(--mud-palette-primary) 3%, transparent);
}

.mud-theme-dark .issue-row:hover {
    background: color-mix(in srgb, var(--mud-palette-primary) 10%, transparent);
}

.issue-row:last-child {
    border-bottom: none;
}

.issue-id {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--plane-text-tertiary);
    min-width: 70px;
}

/* ─── Filter Bar (Plane-style) ─── */
.filter-bar {
    border: 1px solid var(--plane-border-subtle);
    border-radius: var(--plane-radius);
    padding: 8px 16px;
    background: var(--plane-bg-card);
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-chip {
    font-size: 0.78rem;
    padding: 4px 12px;
    border-radius: 4px;
    background: color-mix(in srgb, var(--mud-palette-primary) 8%, transparent);
    color: var(--plane-text-primary);
    border: 1px solid transparent;
    cursor: pointer;
    transition: background 0.15s;
}

.filter-chip:hover {
    background: color-mix(in srgb, var(--mud-palette-primary) 15%, transparent);
}

.filter-chip.active {
    background: var(--mud-palette-primary);
    color: var(--mud-palette-primary-text);
}

/* ─── Burndown ─── */
.burndown-bar {
    border-radius: 3px 3px 0 0;
    transition: height 0.3s ease, opacity 0.2s;
    min-width: 6px;
}

.burndown-bar:hover {
    opacity: 1;
}

/* ─── State Badge ─── */
.state-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid transparent;
}

.state-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
    flex-shrink: 0;
}

/* ─── Section Headers (Plane-style) ─── */
.plane-section-header {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--plane-text-tertiary);
    padding: 16px 0 8px;
}

/* ─── Empty State ─── */
.plane-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 24px;
    text-align: center;
    color: var(--plane-text-tertiary);
}

.plane-empty-state-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.3;
}

.plane-empty-state-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--plane-text-secondary);
    margin-bottom: 8px;
}

.plane-empty-state-description {
    font-size: 0.875rem;
    max-width: 360px;
    line-height: 1.5;
}