/* ================================================================
   StudentOS — patches26.css
   1.  Attendance month calendar — full calendar with navigation
   2.  Worksheet picker — built-in formula library
   ================================================================ */

/* ================================================================
   1.  ATTENDANCE — MONTH CALENDAR
   ================================================================ */

/* Month calendar container inside each card */
.p26-att-month-cal {
    background: var(--glass-hover);
    border-radius: 10px;
    padding: 9px 10px 8px;
    overflow: hidden;
}

/* Navigation row: < Month Year > */
.p26-att-month-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 7px;
    gap: 4px;
}
.p26-att-month-nav-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    padding: 2px 7px;
    border-radius: 7px;
    font-size: .72rem;
    line-height: 1;
    transition: background .12s, color .12s;
    font-family: inherit;
    flex-shrink: 0;
}
.p26-att-month-nav-btn:hover:not(:disabled) {
    background: var(--glass-panel);
    color: var(--text-main);
}
.p26-att-month-nav-btn:disabled {
    opacity: .25;
    cursor: default;
}
.p26-att-month-label {
    font-size: .7rem;
    font-weight: 700;
    color: var(--text-main);
    text-align: center;
    flex: 1;
    white-space: nowrap;
}

/* Day-of-week header row */
.p26-att-dow-row {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
    margin-bottom: 3px;
}
.p26-att-dow-lbl {
    font-size: .5rem;
    text-align: center;
    color: var(--text-muted);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
    padding: 1px 0;
}

/* Calendar grid */
.p26-att-month-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
}
.p26-att-day-cell {
    aspect-ratio: 1;
    border-radius: 5px;
    border: 1px solid transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: border-color .1s, background .1s, transform .1s;
    position: relative;
    background: var(--glass-panel);
}
.p26-att-day-cell span {
    font-size: .55rem;
    font-weight: 600;
    color: var(--text-muted);
    line-height: 1;
    pointer-events: none;
    font-family: 'JetBrains Mono', monospace;
}
.p26-att-day-cell.empty {
    cursor: default;
    background: transparent;
    border-color: transparent;
}
.p26-att-day-cell.future {
    opacity: .22;
    cursor: default;
    pointer-events: none;
}
.p26-att-day-cell:not(.empty):not(.future):hover {
    border-color: var(--accent);
    transform: scale(1.12);
    z-index: 2;
}
.p26-att-day-cell.today {
    box-shadow: 0 0 0 2px var(--accent);
    z-index: 1;
}
.p26-att-day-cell.today span {
    color: var(--accent);
    font-weight: 800;
}
.p26-att-day-cell.attended {
    background: rgba(34, 197, 94, .55);
    border-color: rgba(34, 197, 94, .75);
}
.p26-att-day-cell.attended span { color: #fff; font-weight: 700; }
.p26-att-day-cell.missed {
    background: rgba(239, 68, 68, .5);
    border-color: rgba(239, 68, 68, .65);
}
.p26-att-day-cell.missed span { color: #fff; font-weight: 700; }

/* ================================================================
   2.  WORKSHEET PICKER — BUILT-IN FORMULA LIBRARY
   ================================================================ */

/* Library section inside the picker sheet */
#p26-picker-lib-sec {
    border-top: 1px solid var(--glass-border);
    padding-top: 14px;
    margin-top: 4px;
}

/* Search + subject filter row */
.p26-lib-controls {
    display: flex;
    gap: 7px;
    margin-bottom: 9px;
    align-items: center;
}
.p26-lib-search {
    flex: 1;
    padding: 6px 10px;
    border-radius: 9px;
    border: 1px solid var(--glass-border);
    background: var(--glass-hover);
    color: var(--text-main);
    font-size: .75rem;
    outline: none;
    font-family: inherit;
    transition: border-color .15s;
    min-width: 0;
}
.p26-lib-search:focus { border-color: color-mix(in srgb, var(--accent) 50%, transparent); }
.p26-lib-search::placeholder { color: var(--text-muted); }

.p26-lib-subject-select {
    padding: 6px 8px;
    border-radius: 9px;
    border: 1px solid var(--glass-border);
    background: var(--glass-hover);
    color: var(--text-main);
    font-size: .72rem;
    outline: none;
    cursor: pointer;
    font-family: inherit;
    max-width: 130px;
    transition: border-color .15s;
}
.p26-lib-subject-select:focus { border-color: color-mix(in srgb, var(--accent) 50%, transparent); }

/* Formula card grid */
.p26-lib-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    max-height: 280px;
    overflow-y: auto;
    padding-right: 2px;
}
.p26-lib-grid::-webkit-scrollbar { width: 4px; }
.p26-lib-grid::-webkit-scrollbar-track { background: transparent; }
.p26-lib-grid::-webkit-scrollbar-thumb { background: var(--glass-border); border-radius: 99px; }

.p26-lib-card {
    background: var(--glass-hover);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 9px 10px 8px;
    cursor: pointer;
    transition: border-color .12s, background .12s;
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 0;
}
.p26-lib-card:hover {
    border-color: color-mix(in srgb, var(--accent) 50%, transparent);
    background: var(--glass-panel);
}
.p26-lib-card-title {
    font-size: .72rem;
    font-weight: 700;
    color: var(--text-main);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.p26-lib-card-subj {
    font-size: .58rem;
    color: var(--accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .04em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.p26-lib-card-expr {
    font-size: .65rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 1px;
}

/* No-results message */
.p26-lib-empty {
    grid-column: 1 / -1;
    font-size: .75rem;
    color: var(--text-muted);
    text-align: center;
    padding: 18px 0;
}

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 600px) {
    .p26-lib-grid { grid-template-columns: 1fr; }
    .p26-lib-controls { flex-wrap: wrap; }
    .p26-lib-subject-select { max-width: 100%; }
}