/* ============================================================
   Design tokens — "Schoolbord" green theme
   ============================================================ */

:root {
    --wt-sage:            #2e7d52;   /* primary actions, links      */
    --wt-sage-dark:       #1f5c3b;   /* button hover / darker shade */
    --wt-sage-pale:       #e9f5ee;   /* selected bg, tints          */
    --wt-sage-border:     #a8d4b8;   /* subtle borders              */
    --wt-surface:         #f7faf8;   /* page background             */
    --wt-topbar:          #f2f8f4;   /* top bar background          */
    --wt-topbar-border:   #d4e7da;   /* top bar bottom border       */
    --wt-card:            #ffffff;   /* cards and overlays          */
    --wt-text:            #162219;   /* primary body text           */
    --wt-text-muted:      #5a7862;   /* secondary / placeholder     */
    --wt-input-bg:        #ffffff;   /* form control background     */
    --wt-focus-ring:      rgba(46, 125, 82, 0.38);
    --wt-overlay-bg:      rgba(230, 245, 236, 0.60);
    --wt-shadow-card:     0 8px 40px rgba(14, 42, 24, 0.14);
}

[data-theme="dark"] {
        --wt-sage:            #4ab87a;   /* brighter for dark bg        */
        --wt-sage-dark:       #5dcc8d;   /* hover on dark              */
        --wt-sage-pale:       rgba(74, 184, 122, 0.13);
        --wt-sage-border:     #2b4737;
        --wt-surface:         #0f1912;
        --wt-topbar:          #0c1610;
        --wt-topbar-border:   #1c3526;
        --wt-card:            #162019;
        --wt-text:            #d5eddb;
        --wt-text-muted:      #7aaa87;
        --wt-input-bg:        #1b2d21;   /* form control background     */
        --wt-focus-ring:      rgba(74, 184, 122, 0.45);
        --wt-overlay-bg:      rgba(8, 18, 12, 0.80);
        --wt-shadow-card:     0 8px 40px rgba(0, 0, 0, 0.45);

        /* Pull Bootstrap tokens into our dark palette */
        --bs-body-color:      #d5eddb;
        --bs-secondary-color: #7aaa87;
        --bs-primary:         #4ab87a;
        --bs-primary-rgb:     74, 184, 122;
        --bs-border-color:    #2b4737;
}

/* ============================================================
   Base
   ============================================================ */

html, body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background-color: var(--wt-surface);
    color: var(--wt-text);
}

h1:focus {
    outline: none;
}

a, .btn-link {
    color: var(--wt-sage);
}

.btn-primary {
    color: #fff;
    background-color: var(--wt-sage);
    border-color: var(--wt-sage-dark);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--wt-sage-dark);
    border-color: var(--wt-sage-dark);
}

.btn-outline-secondary {
    color: var(--wt-text-muted);
    border-color: var(--wt-sage-border);
}

.btn-outline-secondary:hover {
    background-color: var(--wt-sage-pale);
    color: var(--wt-text);
    border-color: var(--wt-sage-border);
}

.btn:focus,
.btn:active:focus,
.btn-link.nav-link:focus,
.form-control:focus,
.form-check-input:focus {
    box-shadow: 0 0 0 0.1rem var(--wt-card), 0 0 0 0.25rem var(--wt-focus-ring);
}

.content {
    padding-top: 1.1rem;
}

/* ============================================================
   Form controls — override Bootstrap so both themes work
   ============================================================ */

.form-control,
.form-select {
    background-color: var(--wt-input-bg);
    color: var(--wt-text);
    border-color: var(--wt-sage-border);
}

.form-control:focus,
.form-select:focus {
    background-color: var(--wt-input-bg);
    color: var(--wt-text);
    border-color: var(--wt-sage);
    box-shadow: 0 0 0 0.25rem var(--wt-focus-ring);
}

.form-control::placeholder {
    color: var(--wt-text-muted);
    opacity: 1;
}

.form-control-plaintext {
    color: var(--wt-text);
}

[data-theme="dark"] input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(0.8);
}


.valid.modified:not([type=checkbox]) {
    outline: 1px solid var(--wt-sage);
}

.invalid {
    outline: 1px solid #c0392b;
}

.validation-message {
    color: #c0392b;
}

/* ============================================================
   Blazor error + loading
   ============================================================ */

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iNTYiIGhlaWdodD0iNDkiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgeG1sbnM6eGxpbms9Imh0dHA6Ly93d3cudzMub3JnLzE5OTkveGxpbmsiIG92ZXJmbG93PSJoaWRkZW4iPjxkZWZzPjxjbGlwUGF0aCBpZD0iY2xpcDAiPjxyZWN0IHg9IjIzNSIgeT0iNTEiIHdpZHRoPSI1NiIgaGVpZ2h0PSI0OSIvPjwvY2xpcFBhdGg+PC9kZWZzPjxnIGNsaXAtcGF0aD0idXJsKCNjbGlwMCkiIHRyYW5zZm9ybT0idHJhbnNsYXRlKC0yMzUgLTUxKSI+PHBhdGggZD0iTTI2My41MDYgNTFDMjY0LjcxNyA1MSAyNjUuODEzIDUxLjQ4MzcgMjY2LjYwNiA1Mi4yNjU4TDI2Ny4wNTIgNTIuNzk4NyAyNjcuNTM5IDUzLjYyODMgMjkwLjE4NSA5Mi4xODMxIDI5MC41NDUgOTIuNzk1IDI5MC42NTYgOTIuOTk2QzI5MC44NzcgOTMuNTEzIDI5MSA5NC4wODE1IDI5MSA5NC42NzgyIDI5MSA5Ny4wNjUxIDI4OS4wMzggOTkgMjg2LjYxNyA5OUwyNDAuMzgzIDk5QzIzNy45NjMgOTkgMjM2IDk3LjA2NTEgMjM2IDk0LjY3ODIgMjM2IDk0LjM3OTkgMjM2LjAzMSA5NC4wODg2IDIzNi4wODkgOTMuODA3MkwyMzYuMzM4IDkzLjAxNjIgMjM2Ljg1OCA5Mi4xMzE0IDI1OS40NzMgNTMuNjI5NCAyNTkuOTYxIDUyLjc5ODUgMjYwLjQwNyA1Mi4yNjU4QzI2MS4yIDUxLjQ4MzcgMjYyLjI5NiA1MSAyNjMuNTA2IDUxWk0yNjMuNTg2IDY2LjAxODNDMjYwLjczNyA2Ni4wMTgzIDI1OS4zMTMgNjcuMTI0NSAyNTkuMzEzIDY5LjMzNyAyNTkuMzEzIDY5LjYxMDIgMjU5LjMzMiA2OS44NjA4IDI1OS4zNzEgNzAuMDg4N0wyNjEuNzk1IDg0LjAxNjEgMjY1LjM4IDg0LjAxNjEgMjY3LjgyMSA2OS43NDc1QzI2Ny44NiA2OS43MzA5IDI2Ny44NzkgNjkuNTg3NyAyNjcuODc5IDY5LjMxNzkgMjY3Ljg3OSA2Ny4xMTgyIDI2Ni40NDggNjYuMDE4MyAyNjMuNTg2IDY2LjAxODNaTTI2My41NzYgODYuMDU0N0MyNjEuMDQ5IDg2LjA1NDcgMjU5Ljc4NiA4Ny4zMDA1IDI1OS43ODYgODkuNzkyMSAyNTkuNzg2IDkyLjI4MzcgMjYxLjA0OSA5My41Mjk1IDI2My41NzYgOTMuNTI5NSAyNjYuMTE2IDkzLjUyOTUgMjY3LjM4NyA5Mi4yODM3IDI2Ny4zODcgODkuNzkyMSAyNjcuMzg3IDg3LjMwMDUgMjY2LjExNiA4Ni4wNTQ3IDI2My41NzYgODYuMDU0N1oiIGZpbGw9IiNGRkU1MDAiIGZpbGwtcnVsZT0iZXZlbm9kZCIvPjwvZz48L3N2Zz4=) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

    .blazor-error-boundary::after {
        content: "An error has occurred."
    }

.loading-progress {
    position: absolute;
    display: block;
    width: 8rem;
    height: 8rem;
    inset: 20vh 0 auto 0;
    margin: 0 auto 0 auto;
}

    .loading-progress circle {
        fill: none;
        stroke: #e0e0e0;
        stroke-width: 0.6rem;
        transform-origin: 50% 50%;
        transform: rotate(-90deg);
    }

        .loading-progress circle:last-child {
            stroke: var(--wt-sage);
            stroke-dasharray: calc(3.141 * var(--blazor-load-percentage, 0%) * 0.8), 500%;
            transition: stroke-dasharray 0.05s ease-in-out;
        }

.loading-progress-text {
    position: absolute;
    text-align: center;
    font-weight: bold;
    inset: calc(20vh + 3.25rem) 0 auto 0.2rem;
}

    .loading-progress-text:after {
        content: var(--blazor-load-percentage-text, "Loading");
    }

code {
    color: var(--wt-sage);
}

/* ============================================================
   Bootstrap component overrides — use theme tokens
   ============================================================ */

.table {
    --bs-table-color: var(--wt-text);
    --bs-table-bg: transparent;
    --bs-table-border-color: var(--wt-sage-border);
    --bs-table-hover-bg: var(--wt-sage-pale);
    --bs-table-hover-color: var(--wt-text);
    color: var(--wt-text);
}

/* Bootstrap's cell selector is more specific than .table; match it to enforce text color */
.table > :not(caption) > * > * {
    color: var(--wt-text);
    border-color: var(--wt-sage-border);
}

/* .table-light on thead uses hardcoded Bootstrap light colors; remap to theme tokens */
.table-light,
.table > thead {
    --bs-table-color: var(--wt-text);
    --bs-table-bg: var(--wt-sage-pale);
    --bs-table-border-color: var(--wt-sage-border);
    color: var(--wt-text);
    background-color: var(--wt-sage-pale);
}

.card {
    background-color: var(--wt-card);
    color: var(--wt-text);
    border-color: var(--bs-border-color);
}

.list-group-item {
    background-color: var(--wt-card);
    color: var(--wt-text);
    border-color: var(--wt-sage-border);
}

.list-group-item:hover {
    background-color: var(--wt-sage-pale);
    color: var(--wt-text);
}

.breadcrumb-item a {
    color: var(--wt-sage);
}

.breadcrumb-item.active {
    color: var(--wt-text-muted);
}

.card-header {
    background-color: var(--wt-sage-pale);
    color: var(--wt-text);
    border-bottom-color: var(--bs-border-color);
}

.card-footer {
    background-color: var(--wt-sage-pale);
    border-top-color: var(--bs-border-color);
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
    text-align: start;
}

/* ============================================================
   Auth overlay system
   ============================================================ */

.app-content {
    transition: filter 0.2s ease-in-out;
}

.app-content--blurred {
    filter: blur(4px);
    pointer-events: none;
    user-select: none;
}

.splash-overlay,
.registration-overlay {
    position: fixed;
    inset: 0;
    z-index: 9000;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--wt-overlay-bg);
    backdrop-filter: blur(2px);
}

.splash-overlay--loading {
    background-color: var(--wt-overlay-bg);
    opacity: 0.7;
}

.splash-card,
.registration-card {
    background: var(--wt-card);
    border-radius: 1rem;
    width: 90%;
    box-shadow: var(--wt-shadow-card);
    color: var(--wt-text);
}

.splash-card {
    padding: 3rem 4rem;
    text-align: center;
    max-width: 420px;
    min-height: 16rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.splash-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--wt-sage);
    margin-bottom: 0.5rem;
}

.splash-subtitle {
    color: var(--wt-text-muted);
    margin-bottom: 2rem;
}

.registration-card {
    padding: 2.5rem 3rem;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    color: var(--wt-text);
}

.profile-picture-picker {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin: 0.5rem 0;
}

.profile-picture-option {
    cursor: pointer;
    border: 2px solid transparent;
    border-radius: 0.75rem;
    padding: 0.75rem 1.25rem;
    text-align: center;
    transition: border-color 0.15s, background-color 0.15s;
}

.profile-picture-option:hover {
    border-color: var(--wt-sage-border);
}

.profile-picture-option.selected {
    border-color: var(--wt-sage);
    background-color: var(--wt-sage-pale);
}

.profile-picture-option img {
    width: 80px;
    height: 80px;
    display: block;
    margin: 0 auto 0.5rem;
}

.profile-picture-option span {
    display: block;
    font-size: 0.875rem;
    text-align: center;
}

/* Subject icon picker — compact grid for many icons */
.subject-icon-picker {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 0.25rem 0;
}

.subject-icon-option {
    cursor: pointer;
    border: 2px solid transparent;
    border-radius: 0.5rem;
    padding: 0.375rem;
    transition: border-color 0.15s, background-color 0.15s;
}

.subject-icon-option:hover {
    border-color: var(--wt-sage-border);
}

.subject-icon-option.selected {
    border-color: var(--wt-sage);
    background-color: var(--wt-sage-pale);
}

.subject-icon-option img {
    width: 40px;
    height: 40px;
    display: block;
}

/* Instruction level icon theme preview */
.level-preview-grid {
    display: inline-grid;
    grid-template-columns: 20px var(--wt-preview-label-col, 8rem) 64px var(--wt-preview-label-col, 8rem) 20px;
    column-gap: 0.75rem;
    row-gap: 0.3rem;
    align-items: center;
}

.level-preview-header {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--wt-text-muted);
    padding-bottom: 0.25rem;
}

.level-preview-arrow {
    display: block;
    height: 100%;
    align-self: stretch;
}

.level-preview-instruction { text-align: right; font-size: 0.875rem; }
.level-preview-proficiency  { font-size: 0.875rem; }

/* Instruction level assignment grid */
.level-grid-table {
    width: 100%;
    border-collapse: collapse;
}

.level-grid-table th,
.level-grid-table td {
    border: 1px solid var(--wt-sage-border);
    padding: 0.375rem 0.5rem;
    vertical-align: middle;
}

.level-grid-table th {
    background-color: var(--wt-topbar);
    font-weight: 600;
    font-size: 0.8125rem;
    text-align: center;
}

.level-grid-table th.student-col {
    text-align: left;
    min-width: 140px;
}

.level-grid-table td.student-name {
    font-size: 0.875rem;
    white-space: nowrap;
}

.level-grid-table .subject-header-img {
    width: 44px;
    height: 44px;
    display: block;
    margin: 0 auto 0.25rem;
}

/* Level icon legend in subject column header */
.level-header-icons {
    display: flex;
    justify-content: center;
    gap: 4px;
    margin-top: 4px;
}

.level-header-icon {
    width: 36px;
    height: 36px;
}

/* Segmented level buttons */
.level-btns {
    display: flex;
    gap: 4px;
    justify-content: center;
}

.level-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem 0;
    border: 1px solid var(--wt-sage-border);
    border-radius: 0.375rem;
    background: transparent;
    cursor: pointer;
    font-size: 0.6875rem;
    color: var(--wt-text-muted);
    transition: border-color 0.12s, background-color 0.12s, color 0.12s;
    width: 36px;
}

.level-btn:hover {
    border-color: var(--wt-sage);
    color: var(--wt-text);
}

.level-btn.active {
    border-color: var(--wt-sage);
    background-color: var(--wt-sage-pale);
    color: var(--wt-sage);
}

.level-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Single-subject level assignment table */
.level-assign-table {
    width: auto;
    border-collapse: collapse;
}

.level-assign-table th,
.level-assign-table td {
    border: 1px solid var(--wt-sage-border);
    padding: 0.375rem 0.5rem;
    vertical-align: middle;
}

.level-assign-table th {
    background-color: var(--wt-topbar);
    font-weight: 600;
    font-size: 0.8125rem;
    text-align: center;
}

.level-assign-table .student-col {
    text-align: left;
    min-width: 140px;
}

.level-assign-table td.student-name {
    font-size: 0.875rem;
    white-space: nowrap;
}

.level-icon-row,
.level-btn-row {
    display: flex;
    gap: 8px;
    justify-content: flex-start;
    align-items: center;
}

.level-assign-header-icon {
    width: 64px;
    height: 64px;
    flex-shrink: 0;
}

.level-btn-slot {
    width: 64px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-shrink: 0;
}

.level-assign-cell {
    text-align: left;
    width: 352px; /* 5 × 64px + 4 × 8px gap — fixed so 3-level and 5-level subjects don't shift */
}

.level-assign-btn {
    width: 40px;
    height: 40px;
    border: 2px solid var(--wt-sage-border);
    border-radius: 50%;
    background: transparent;
    cursor: pointer;
    transition: border-color 0.12s, background-color 0.12s;
}

.level-assign-btn:hover {
    border-color: var(--wt-sage);
}

.level-assign-btn.active {
    border-color: var(--wt-sage);
    background-color: var(--wt-sage-pale);
}

.level-assign-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* In-page loading spinner */
.wt-loading {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--wt-text-muted);
    padding: 0.5rem 0;
}

.wt-loading .spinner-border {
    color: var(--wt-sage);
}