.fi-fortnight-picker {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    border: 1px solid var(--gray-200);
    border-radius: 0.75rem;
    padding: 0.875rem;
    background: var(--gray-50);
}

.dark .fi-fortnight-picker {
    border-color: var(--gray-700);
    background: color-mix(in oklch, var(--gray-900) 50%, transparent);
}

/* mode toggle */
.fi-fp-modes {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.fi-fp-segmented {
    display: inline-flex;
    padding: 2px;
    border-radius: 0.5rem;
    background: var(--gray-100);
    gap: 2px;
}

.dark .fi-fp-segmented {
    background: var(--gray-800);
}

.fi-fp-seg {
    padding: 0.25rem 0.625rem;
    border-radius: 0.375rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--gray-600);
    transition: background 75ms, color 75ms;
}

.dark .fi-fp-seg {
    color: var(--gray-300);
}

.fi-fp-seg:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.fi-fp-seg-on {
    background: var(--gray-50);
    color: var(--gray-900);
    box-shadow: 0 1px 2px rgb(0 0 0 / 0.08);
}

.dark .fi-fp-seg-on {
    background: var(--gray-950);
    color: var(--gray-50);
}

.fi-fp-notice {
    font-size: 0.6875rem;
    color: color-mix(in oklch, var(--danger-600) 90%, var(--gray-700));
}

/* nav */
.fi-fp-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.fi-fp-nav-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-700);
}

.dark .fi-fp-nav-label {
    color: var(--gray-200);
}

.fi-fp-nav-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 2rem;
    width: 2rem;
    border-radius: 0.5rem;
    color: var(--gray-500);
    transition: background 75ms;
}

.fi-fp-nav-btn:not(:disabled):hover {
    background: var(--gray-100);
    color: var(--gray-700);
}

.dark .fi-fp-nav-btn:not(:disabled):hover {
    background: var(--gray-800);
    color: var(--gray-200);
}

.fi-fp-nav-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.fi-fp-nav-icon {
    height: 1.25rem;
    width: 1.25rem;
}

/* months */
.fi-fp-months {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
}

@media (min-width: 768px) {
    .fi-fp-months {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.fi-fp-month-title {
    text-align: center;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--gray-600);
    margin-bottom: 0.5rem;
}

.dark .fi-fp-month-title {
    color: var(--gray-300);
}

.fi-fp-weekdays,
.fi-fp-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 2px;
}

.fi-fp-weekday {
    text-align: center;
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--gray-400);
    padding-bottom: 0.25rem;
}

.fi-fp-grid {
    margin-top: 0.25rem;
}

/* day cell */
.fi-fp-day {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 1 / 1;
    border-radius: 0.375rem;
    font-size: 0.8125rem;
    color: var(--gray-700);
    background: transparent;
    transition: background 75ms, box-shadow 75ms;
}

.dark .fi-fp-day {
    color: var(--gray-200);
}

/* only Mondays are actionable */
.fi-fp-monday {
    cursor: pointer;
    font-weight: 600;
    box-shadow: inset 0 0 0 1px var(--primary-400);
}

.fi-fp-monday:hover {
    background: color-mix(in oklch, var(--primary-500) 14%, transparent);
}

.fi-fp-off {
    color: var(--gray-300);
}

.dark .fi-fp-off {
    color: var(--gray-600);
}

/* non-selectable days (non-Mondays, taken Mondays) read as a plain calendar */
.fi-fp-day:disabled {
    cursor: default;
}

.fi-fp-today .fi-fp-day-num {
    font-weight: 700;
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* existing review — solid green fill across the fortnight (done, not a checkbox) */
.fi-fp-review {
    background: color-mix(in oklch, var(--success-500) 20%, transparent);
    color: color-mix(in oklch, var(--success-700) 90%, var(--gray-900));
}

.dark .fi-fp-review {
    background: color-mix(in oklch, var(--success-500) 26%, transparent);
    color: var(--gray-100);
}

/* missed period — composite reddish background suggesting missing values */
.fi-fp-skip {
    background-color: color-mix(in oklch, var(--danger-500) 14%, transparent);
    background-image: repeating-linear-gradient(
        45deg,
        color-mix(in oklch, var(--danger-500) 22%, transparent),
        color-mix(in oklch, var(--danger-500) 22%, transparent) 3px,
        transparent 3px,
        transparent 7px
    );
    color: color-mix(in oklch, var(--danger-700) 90%, var(--gray-900));
}

.dark .fi-fp-skip {
    color: var(--gray-100);
}

/* selection (wins over review/skip backgrounds) */
.fi-fp-sel {
    background: color-mix(in oklch, var(--primary-500) 26%, transparent);
    background-image: none;
    box-shadow: none;
}

.fi-fp-sel-start,
.fi-fp-sel-end {
    background: var(--primary-600);
    background-image: none;
    color: white;
    box-shadow: none;
}

/* legend */
.fi-fp-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    font-size: 0.6875rem;
    color: var(--gray-500);
    padding-top: 0.25rem;
    border-top: 1px solid var(--gray-200);
}

.dark .fi-fp-legend {
    border-color: var(--gray-700);
}

.fi-fp-legend-item {
    display: inline-flex;
    align-items: center;
    gap: 0.3125rem;
}

.fi-fp-swatch {
    height: 0.625rem;
    width: 0.625rem;
    border-radius: 3px;
    display: inline-block;
}

.fi-fp-swatch-sel {
    background: var(--primary-600);
}

.fi-fp-swatch-review {
    background: color-mix(in oklch, var(--success-500) 60%, transparent);
}

.fi-fp-swatch-skip {
    background-image: repeating-linear-gradient(
        45deg,
        color-mix(in oklch, var(--danger-500) 50%, transparent),
        color-mix(in oklch, var(--danger-500) 50%, transparent) 2px,
        transparent 2px,
        transparent 4px
    );
    border: 1px solid color-mix(in oklch, var(--danger-500) 40%, transparent);
}