/* =============================================================
   Timetable redesign — class & teacher timetable day cards
   Token-driven (DESIGN.md): radius scale, layered shadows, brand
   vars via color-mix, Lucide icons via mask-image (no FA).
   Loaded after content.css in include.blade.php; direction-neutral
   (flex/grid rows), RTL flips scoped via [dir="rtl"].
   ============================================================= */

/* --- Responsive day grid -------------------------------------- */
.timetable-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(248px, 1fr));
    gap: 1rem;
    margin-top: 0.5rem;
}

/* --- Day card ------------------------------------------------- */
.timetable-day {
    display: flex;
    flex-direction: column;
    background: #fff;
    border: 1px solid rgba(27, 27, 27, 0.06);
    border-radius: 14px;
    box-shadow:
        0 1px 2px rgba(16, 24, 40, 0.04),
        0 2px 6px rgba(16, 24, 40, 0.04);
    overflow: hidden;
    transition: box-shadow 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.timetable-day:hover {
    box-shadow:
        0 2px 4px rgba(16, 24, 40, 0.05),
        0 6px 16px rgba(16, 24, 40, 0.05),
        0 12px 28px rgba(16, 24, 40, 0.04);
}

/* --- Day header (theme-tinted bar) ---------------------------- */
.timetable-day__head {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: color-mix(in srgb, var(--theme-color) 8%, #fff);
    border-bottom: 1px solid color-mix(in srgb, var(--theme-color) 12%, rgba(27, 27, 27, 0.06));
}

.timetable-day__head::before {
    content: "";
    flex: 0 0 auto;
    width: 18px;
    height: 18px;
    background-color: var(--theme-color);
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-position: center;
    mask-position: center;
    -webkit-mask-size: 18px 18px;
    mask-size: 18px 18px;
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M8 2v4'/%3E%3Cpath d='M16 2v4'/%3E%3Crect width='18' height='18' x='3' y='4' rx='2'/%3E%3Cpath d='M3 10h18'/%3E%3C/svg%3E");
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M8 2v4'/%3E%3Cpath d='M16 2v4'/%3E%3Crect width='18' height='18' x='3' y='4' rx='2'/%3E%3Cpath d='M3 10h18'/%3E%3C/svg%3E");
}

.timetable-day__name {
    flex: 1 1 auto;
    font-family: "Roboto-Medium", "ubuntu-medium", sans-serif;
    font-size: 0.9375rem;
    color: #343a40;
    text-transform: capitalize;
    letter-spacing: -0.005em;
}

.timetable-day__count {
    flex: 0 0 auto;
    min-width: 1.5rem;
    padding: 0.0625rem 0.5rem;
    text-align: center;
    font-size: 0.75rem;
    line-height: 1.4;
    font-family: "Roboto-Medium", "ubuntu-medium", sans-serif;
    color: var(--theme-color);
    background: color-mix(in srgb, var(--theme-color) 12%, transparent);
    border: 1px solid color-mix(in srgb, var(--theme-color) 25%, transparent);
    border-radius: 10rem;
}

/* --- Periods list --------------------------------------------- */
.timetable-day__periods {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
    padding: 0.875rem;
}

.timetable-day__periods:empty::after {
    content: attr(data-empty);
    display: block;
    padding: 0.75rem 0.25rem;
    text-align: center;
    font-size: 0.8125rem;
    color: #8c8c8c;
}

/* --- Single period card --------------------------------------- */
.timetable-period {
    position: relative;
    padding: 0.625rem 0.75rem 0.625rem 0.875rem;
    background: #fff;
    border: 1px solid rgba(27, 27, 27, 0.06);
    border-left: 3px solid var(--theme-color);
    border-radius: 10px;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.timetable-period:hover {
    background: color-mix(in srgb, var(--theme-color) 4%, #fff);
    border-color: color-mix(in srgb, var(--theme-color) 18%, rgba(27, 27, 27, 0.06));
    border-left-color: var(--theme-color);
}

/* Time chip with clock icon */
.timetable-period__time {
    display: inline-flex;
    align-items: center;
    gap: 0.3125rem;
    margin-bottom: 0.375rem;
    font-size: 0.75rem;
    color: rgba(27, 27, 27, 0.7);
    font-family: "Roboto-Medium", "ubuntu-medium", sans-serif;
}

.timetable-period__time::before {
    content: "";
    flex: 0 0 auto;
    width: 13px;
    height: 13px;
    background-color: currentColor;
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-position: center;
    mask-position: center;
    -webkit-mask-size: 13px 13px;
    mask-size: 13px 13px;
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='10'/%3E%3Cpolyline points='12 6 12 12 16 14'/%3E%3C/svg%3E");
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='10'/%3E%3Cpolyline points='12 6 12 12 16 14'/%3E%3C/svg%3E");
}

/* Subject — the prominent line */
.timetable-period__subject {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.375rem;
    font-family: "Roboto-Medium", "ubuntu-medium", sans-serif;
    font-size: 0.875rem;
    color: #343a40;
    line-height: 1.3;
}

.timetable-period__type {
    text-transform: capitalize;
}

/* Teacher — muted supporting line with user icon */
.timetable-period__teacher {
    display: flex;
    align-items: center;
    gap: 0.3125rem;
    margin-top: 0.3125rem;
    font-size: 0.8125rem;
    color: #8c8c8c;
}

.timetable-period__teacher::before {
    content: "";
    flex: 0 0 auto;
    width: 14px;
    height: 14px;
    background-color: currentColor;
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-position: center;
    mask-position: center;
    -webkit-mask-size: 14px 14px;
    mask-size: 14px 14px;
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M19 21v-2a4 4 0 0 0-4-4H9a4 4 0 0 0-4 4v2'/%3E%3Ccircle cx='12' cy='7' r='4'/%3E%3C/svg%3E");
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M19 21v-2a4 4 0 0 0-4-4H9a4 4 0 0 0-4 4v2'/%3E%3Ccircle cx='12' cy='7' r='4'/%3E%3C/svg%3E");
}

/* Class-section line (teacher timetable view) */
.timetable-period__class {
    margin-bottom: 0.25rem;
    font-size: 0.75rem;
    color: var(--theme-color);
    font-family: "Roboto-Medium", "ubuntu-medium", sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

/* Live-class link / edit button inside a period (teacher view) */
.timetable-period__link {
    display: inline-block;
    margin-top: 0.4375rem;
    font-size: 0.8125rem;
    color: var(--theme-color);
}

.timetable-period__actions {
    margin-top: 0.625rem;
}

/* --- Empty state --------------------------------------------- */
/* Block layout (not flex) so jQuery .show()/.hide() — which forces
   display:block on this element — keeps the centered icon + text. */
.timetable-empty {
    margin: 1.5rem auto 0;
    padding: 2rem 1.5rem;
    max-width: 28rem;
    text-align: center;
    color: #8c8c8c;
    background: color-mix(in srgb, var(--theme-color) 3%, #fff);
    border: 1px dashed color-mix(in srgb, var(--theme-color) 18%, rgba(27, 27, 27, 0.08));
    border-radius: 14px;
}

.timetable-empty::before {
    content: "";
    display: block;
    width: 32px;
    height: 32px;
    margin: 0 auto 0.5rem;
    background-color: color-mix(in srgb, var(--theme-color) 55%, #8c8c8c);
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-position: center;
    mask-position: center;
    -webkit-mask-size: 32px 32px;
    mask-size: 32px 32px;
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M8 2v4'/%3E%3Cpath d='M16 2v4'/%3E%3Crect width='18' height='18' x='3' y='4' rx='2'/%3E%3Cpath d='M3 10h18'/%3E%3Cpath d='M8 14h.01'/%3E%3Cpath d='M12 14h.01'/%3E%3Cpath d='M16 14h.01'/%3E%3Cpath d='M8 18h.01'/%3E%3Cpath d='M12 18h.01'/%3E%3C/svg%3E");
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M8 2v4'/%3E%3Cpath d='M16 2v4'/%3E%3Crect width='18' height='18' x='3' y='4' rx='2'/%3E%3Cpath d='M3 10h18'/%3E%3Cpath d='M8 14h.01'/%3E%3Cpath d='M12 14h.01'/%3E%3Cpath d='M16 14h.01'/%3E%3Cpath d='M8 18h.01'/%3E%3Cpath d='M12 18h.01'/%3E%3C/svg%3E");
}

.timetable-empty strong {
    font-family: "Roboto-Medium", "ubuntu-medium", sans-serif;
    color: #343a40;
}

/* --- RTL: flip the period accent strip to the inline-end ------ */
[dir="rtl"] .timetable-period {
    border-left: 1px solid rgba(27, 27, 27, 0.06);
    border-right: 3px solid var(--theme-color);
    padding: 0.625rem 0.875rem 0.625rem 0.75rem;
}

[dir="rtl"] .timetable-period:hover {
    border-right-color: var(--theme-color);
}

/* =============================================================
   Create-timetable form — resources/views/timetable/index.blade.php
   and the addmore / tab_title / tab_footer partials.
   Behaviour: public/assets/js/custom/timetable.js (no inline blade JS).
   ============================================================= */

/* --- Filters card: session-year + class-section selectors ----- */
.tt-filters .form-label {
    font-family: "Roboto-Medium", "ubuntu-medium", sans-serif;
    font-weight: 500;
    color: #343a40;
    margin-bottom: 0.375rem;
}

.tt-filters .select_error {
    font-size: 0.8125rem;
    margin-top: 0.25rem;
}

/* --- Loader -------------------------------------------------- */
.tt-loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    width: 100%;
    min-height: 320px;
    gap: 0.875rem;
    color: rgba(27, 27, 27, 0.7);
}

.tt-loader__spinner {
    color: var(--theme-color);
    animation: tt-spin 0.8s linear infinite;
}

.tt-loader__text {
    margin: 0;
    font-size: 0.9375rem;
}

@keyframes tt-spin {
    to {
        transform: rotate(360deg);
    }
}

@media (prefers-reduced-motion: reduce) {
    .tt-loader__spinner {
        animation-duration: 2s;
    }
}

/* --- Day tabs: a segmented pill row --------------------------- */
.tt-days.timetable_nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
    padding: 0.3125rem;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(27, 27, 27, 0.06);
    border-radius: 12px;
    background: color-mix(in srgb, var(--theme-color) 4%, #f7f8fa);
}

.tt-days.timetable_nav .nav-item {
    flex: 1 1 auto;
    margin: 0;
}

.tt-days.timetable_nav .nav-link {
    display: block;
    text-align: center;
    padding: 0.5rem 0.75rem;
    border: 0;
    border-radius: 9px;
    background: transparent;
    color: rgba(27, 27, 27, 0.7);
    font-family: "Roboto-Medium", "ubuntu-medium", sans-serif;
    font-weight: 500;
    font-size: 0.875rem;
    white-space: nowrap;
    transition: background 0.2s ease, color 0.2s ease;
}

.tt-days.timetable_nav .nav-link:hover {
    background: color-mix(in srgb, var(--theme-color) 7%, transparent);
    color: var(--theme-color);
}

.tt-days.timetable_nav .nav-link.active {
    background: #fff;
    color: var(--theme-color);
    box-shadow:
        0 1px 2px rgba(16, 24, 40, 0.06),
        0 2px 6px rgba(16, 24, 40, 0.06);
}

/* --- Column header (desktop) — aligns with the .tt-row grid --- */
.tt-grid-head,
.tt-row {
    display: grid;
    grid-template-columns:
        minmax(0, 2fr) minmax(0, 2fr) minmax(0, 1.25fr)
        minmax(0, 1.25fr) minmax(0, 2fr) minmax(0, 1.5fr) 44px;
    gap: 0.75rem;
    align-items: center;
}

.tt-grid-head {
    padding: 0 0.875rem 0.625rem;
    margin-bottom: 0.5rem;
    border-bottom: 1px solid rgba(27, 27, 27, 0.06);
}

.tt-grid-head__label {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-family: "Roboto-Medium", "ubuntu-medium", sans-serif;
    font-weight: 500;
    font-size: 0.75rem;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: #475569;
}

.tt-grid-head__label .lc-icon {
    color: var(--theme-color);
    flex: none;
}

.tt-grid-head__label .req {
    color: #dc3545;
}

/* --- Period rows --------------------------------------------- */
.tt-list {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.tt-row {
    padding: 0.625rem 0.875rem;
    margin: 0;
    border: 1px solid rgba(27, 27, 27, 0.06);
    border-radius: 12px;
    background: #fff;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.tt-row:hover {
    border-color: color-mix(in srgb, var(--theme-color) 22%, rgba(27, 27, 27, 0.06));
    box-shadow:
        0 1px 2px rgba(16, 24, 40, 0.04),
        0 2px 6px rgba(16, 24, 40, 0.04);
}

.tt-row .form-control {
    width: 100%;
}

.tt-cell {
    min-width: 0;
}

/* --- Delete button ------------------------------------------- */
.tt-row__remove {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    padding: 0;
    border: 1px solid color-mix(in srgb, #dc3545 22%, transparent);
    border-radius: 9px;
    background: color-mix(in srgb, #dc3545 8%, #fff);
    color: #b42318;
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.tt-row__remove:hover {
    background: color-mix(in srgb, #dc3545 14%, #fff);
    border-color: color-mix(in srgb, #dc3545 35%, transparent);
    color: #b42318;
}

.tt-row__remove:disabled,
.tt-row__remove.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* --- Footer action bar: add-period + submit ------------------ */
.tt-footer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid rgba(27, 27, 27, 0.06);
}

/* Add-period — a dashed ghost button reading as "insert another row". */
.tt-add {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: 1px dashed color-mix(in srgb, var(--theme-color) 40%, rgba(27, 27, 27, 0.18));
    border-radius: 10px;
    background: color-mix(in srgb, var(--theme-color) 5%, #fff);
    color: var(--theme-color);
    font-family: "Roboto-Medium", "ubuntu-medium", sans-serif;
    font-weight: 500;
    font-size: 0.875rem;
    transition: background 0.2s ease, border-color 0.2s ease;
}

.tt-add:hover {
    background: color-mix(in srgb, var(--theme-color) 10%, #fff);
    border-color: var(--theme-color);
    color: var(--theme-color);
}

.tt-footer .btn-theme {
    margin: 0;
}

/* --- Responsive: stack rows into labelled fields -------------- */
@media (max-width: 991px) {
    .tt-grid-head {
        display: none;
    }

    .tt-row {
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem 1rem;
        padding: 1rem;
    }

    .tt-cell::before {
        content: attr(data-label);
        display: block;
        margin-bottom: 0.25rem;
        font-family: "Roboto-Medium", "ubuntu-medium", sans-serif;
        font-weight: 500;
        font-size: 0.75rem;
        color: #8c8c8c;
    }

    .tt-row .tt-cell--wide {
        grid-column: 1 / -1;
    }

    .tt-row__remove {
        grid-column: 1 / -1;
        width: 100%;
        height: 40px;
        gap: 0.5rem;
    }

    .tt-row__remove::after {
        content: attr(data-label);
        font-family: "Roboto-Medium", "ubuntu-medium", sans-serif;
        font-weight: 500;
        font-size: 0.875rem;
    }
}

@media (max-width: 575px) {
    .tt-row {
        grid-template-columns: 1fr;
    }

    .tt-row .tt-cell {
        grid-column: 1 / -1 !important;
    }

    .tt-days.timetable_nav .nav-item {
        flex-basis: calc(33.333% - 0.25rem);
    }
}