/* Capa comun de usabilidad. Mantiene la logica de cada pantalla intacta. */
:root {
    --ux-primary: #4f46e5;
    --ux-primary-strong: #3730a3;
    --ux-primary-soft: #eef2ff;
    --ux-accent: #0f766e;
    --ux-border: #dbe3ef;
    --ux-border-strong: #c7d2fe;
    --ux-surface: #ffffff;
    --ux-surface-muted: #f8f9ff;
    --ux-page-bg: #f3f6fb;
    --ux-text: #1f2937;
    --ux-muted: #64748b;
    --ux-danger: #b91c1c;
    --ux-warning: #b45309;
    --ux-success: #166534;
    --ux-shadow: 0 16px 40px rgba(15, 23, 42, 0.16);
    --ux-radius: 8px;
    --ux-radius-shell: 10px;
}

body.ux-app-shell {
    min-height: 100vh;
    padding: 20px;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    color: var(--ux-text);
    background: var(--ux-page-bg);
}

.ux-shell {
    max-width: 1400px;
    margin: 0 auto;
    overflow: hidden;
    background: var(--ux-surface);
    border-radius: var(--ux-radius-shell);
    box-shadow: 0 14px 42px rgba(31, 41, 55, 0.16);
}

.ux-shell.narrow,
body.ux-app-shell .ux-shell.narrow {
    max-width: 960px;
}

.ux-page-nav,
.page-nav.ux-page-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: var(--ux-surface-muted);
    border-bottom: 1px solid #e5e7eb;
}

.ux-nav-group,
.nav-group.ux-nav-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.ux-button,
.ux-link-button,
.nav-button.ux-button,
.nav-link.ux-link-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 8px 14px;
    border: 1px solid var(--ux-border-strong);
    border-radius: 7px;
    color: var(--ux-primary);
    background: #ffffff;
    font: inherit;
    font-size: 0.9rem;
    font-weight: 750;
    text-decoration: none;
    cursor: pointer;
}

.ux-button:hover,
.ux-link-button:hover,
.nav-button.ux-button:hover,
.nav-link.ux-link-button:hover {
    background: #f5f3ff;
    border-color: var(--ux-primary);
    box-shadow: none;
    transform: none;
}

.ux-button.primary,
.ux-link-button.primary,
.nav-button.ux-button.primary,
.nav-link.ux-link-button.primary,
a.nav-button.ux-button {
    color: #ffffff;
    background: var(--ux-primary);
    border-color: var(--ux-primary);
}

.ux-button.primary:hover,
.ux-link-button.primary:hover,
.nav-button.ux-button.primary:hover,
.nav-link.ux-link-button.primary:hover,
a.nav-button.ux-button:hover {
    background: #4338ca;
    box-shadow: none;
    transform: none;
}

.ux-page-header,
.header.ux-page-header,
.page-header.ux-page-header {
    padding: 28px 30px;
    color: #ffffff;
    background: var(--ux-primary-strong);
}

.ux-page-header h1,
.header.ux-page-header h1,
.page-header.ux-page-header h1 {
    margin: 0 0 6px;
    color: #ffffff;
    font-size: 2rem;
    line-height: 1.15;
}

.ux-page-header p,
.header.ux-page-header p,
.page-header.ux-page-header p {
    margin: 0;
    color: #eef2ff;
    opacity: 1;
}

.ux-page-header :is(h2, h3, strong, span, small, .section-subtitle, .module-name) {
    color: #ffffff;
}

.ux-content,
.content.ux-content {
    padding: 24px;
}

.ux-toolbar,
.toolbar.ux-toolbar,
.controls.ux-toolbar {
    display: grid;
    gap: 12px;
    align-items: end;
    margin-bottom: 18px;
    padding: 16px;
    background: var(--ux-surface-muted);
    border: 1px solid #e5e7eb;
    border-radius: var(--ux-radius);
}

.ux-field-label,
.ux-toolbar label,
.ux-field label {
    display: block;
    margin-bottom: 6px;
    color: #4b5563;
    font-size: 0.86rem;
    font-weight: 750;
}

.ux-toolbar :is(select, input, textarea),
.ux-field :is(select, input, textarea) {
    width: 100%;
    min-height: 40px;
    padding: 8px 10px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font: inherit;
    background: #ffffff;
}

.ux-summary,
.stats.ux-summary {
    display: grid;
    grid-template-columns: minmax(180px, 240px) repeat(3, minmax(96px, 120px));
    justify-content: start;
    gap: 8px;
    margin-bottom: 14px;
}

.ux-stat,
.stat.ux-stat,
.stat-card.ux-stat {
    padding: 9px 10px;
    background: var(--ux-surface-muted);
    border-left: 3px solid var(--ux-primary);
    border-radius: 6px;
}

.ux-stat span,
.stat.ux-stat span,
.stat-card.ux-stat h3 {
    display: block;
    margin: 0 0 3px;
    color: var(--ux-muted);
    font-size: 0.76rem;
}

.ux-stat strong,
.stat.ux-stat strong,
.stat-card.ux-stat .number {
    display: block;
    overflow: hidden;
    color: var(--ux-primary);
    font-size: 1.05rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ux-table-wrap,
.table-wrap.ux-table-wrap,
.table-container.ux-table-wrap,
.resumen-wrap.ux-table-wrap {
    overflow: auto;
    border: 1px solid #e5e7eb;
    border-radius: var(--ux-radius);
}

.ux-table,
table.ux-table {
    width: 100%;
    border-collapse: collapse;
}

.ux-table th,
.ux-table td,
table.ux-table th,
table.ux-table td {
    padding: 10px 12px;
    border-bottom: 1px solid #e5e7eb;
    text-align: left;
}

.ux-table th,
table.ux-table th {
    color: #ffffff;
    background: var(--ux-primary);
    font-weight: 800;
}

.ux-table tr:hover td,
table.ux-table tr:hover td {
    background: var(--ux-surface-muted);
}

.ux-tabs,
.tabs.ux-tabs,
.view-tabs.ux-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 0;
}

.ux-tab,
.tab-btn.ux-tab {
    min-height: 38px;
    padding: 7px 18px;
    border: 1px solid #d1d5db;
    border-bottom: none;
    border-radius: 6px 6px 0 0;
    color: #4b5563;
    background: #f3f4f6;
    font: inherit;
    font-size: 0.9rem;
    font-weight: 750;
    cursor: pointer;
}

.ux-tab.active,
.tab-btn.ux-tab.active {
    color: #ffffff;
    background: var(--ux-primary);
    border-color: var(--ux-primary);
}

.ux-panel {
    border: 1px solid #e5e7eb;
    border-radius: var(--ux-radius);
    background: #ffffff;
}

.ux-panel.attached-tabs {
    border-radius: 0 var(--ux-radius) var(--ux-radius) var(--ux-radius);
}

.ux-grade {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 30px;
    padding: 4px 8px;
    border-radius: 999px;
    font-weight: 800;
}

.ux-grade.ok { color: #166534; background: #dcfce7; }
.ux-grade.warn { color: #92400e; background: #fef3c7; }
.ux-grade.bad { color: #991b1b; background: #fee2e2; }
.ux-grade.empty { color: #6b7280; background: #f3f4f6; }

.ux-save-bar {
    position: sticky;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 20px;
    background: #ffffff;
    border-top: 1px solid #e0e7ff;
    box-shadow: 0 -4px 16px rgba(99, 102, 241, 0.10);
}

.ux-skip-link {
    position: fixed;
    top: 10px;
    left: 10px;
    z-index: 10000;
    transform: translateY(-160%);
    padding: 9px 12px;
    border-radius: 7px;
    color: #ffffff;
    background: #111827;
    font-weight: 800;
    text-decoration: none;
    transition: transform 0.15s ease;
}

.ux-skip-link:focus {
    transform: translateY(0);
}

body.ux-enhanced :is(a, button, input, select, textarea):focus-visible {
    outline: 3px solid rgba(15, 118, 110, 0.35);
    outline-offset: 2px;
}

body.ux-enhanced .page-nav.ux-sticky-nav {
    position: sticky;
    top: 0;
    z-index: 40;
    box-shadow: 0 6px 18px rgba(15, 23, 42, 0.08);
}

body.ux-enhanced .message,
body.ux-enhanced #message,
body.ux-enhanced #saveStatus {
    scroll-margin-top: 88px;
}

.app-ux-status {
    position: fixed;
    right: 16px;
    bottom: 16px;
    z-index: 9000;
    display: flex;
    align-items: center;
    gap: 8px;
    max-width: min(360px, calc(100vw - 32px));
    padding: 10px 13px;
    border: 1px solid var(--ux-border);
    border-radius: 8px;
    color: #172033;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--ux-shadow);
    font-size: 0.86rem;
    font-weight: 750;
    opacity: 0;
    pointer-events: none;
    transform: translateY(12px);
    transition: opacity 0.18s ease, transform 0.18s ease;
}

.app-ux-status.show {
    opacity: 1;
    transform: translateY(0);
}

.app-ux-status::before {
    content: "";
    width: 9px;
    height: 9px;
    border-radius: 999px;
    background: var(--ux-primary);
    flex: 0 0 auto;
}

.app-ux-status.success::before,
.app-ux-status.saved::before {
    background: #16a34a;
}

.app-ux-status.error::before {
    background: #dc2626;
}

.app-ux-status.warning::before,
.app-ux-status.saving::before,
.app-ux-status.info::before {
    background: #f59e0b;
}

.ux-modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 9500;
    display: grid;
    place-items: center;
    padding: 18px;
    background: rgba(15, 23, 42, 0.42);
}

.ux-modal {
    width: min(420px, 100%);
    border-radius: 10px;
    background: #ffffff;
    box-shadow: var(--ux-shadow);
    overflow: hidden;
}

.ux-modal-header {
    padding: 16px 18px 8px;
}

.ux-modal-title {
    margin: 0;
    color: #111827;
    font-size: 1rem;
    font-weight: 850;
}

.ux-modal-body {
    padding: 0 18px 16px;
    color: #374151;
    font-size: 0.92rem;
    line-height: 1.45;
    white-space: pre-wrap;
}

.ux-modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 12px 18px 16px;
    background: #f8fafc;
}

.ux-modal-actions button {
    min-height: 38px;
    border-radius: 7px;
}

.ux-modal-cancel {
    color: #334155 !important;
    background: #ffffff !important;
    border: 1px solid #cbd5e1 !important;
}

.ux-modal-confirm {
    color: #ffffff !important;
    background: #4f46e5 !important;
    border: 1px solid #4f46e5 !important;
}

.ux-error-jump {
    display: none;
    min-height: 32px;
    margin-left: 10px;
    padding: 6px 10px;
    border: 1px solid #fecaca;
    border-radius: 7px;
    color: #991b1b;
    background: #fff1f2;
    font-size: 0.78rem;
    font-weight: 800;
    cursor: pointer;
}

body.ux-has-errors .ux-error-jump {
    display: inline-flex;
    align-items: center;
}

.ux-table-hint {
    margin: 6px 0 0;
    color: var(--ux-muted);
    font-size: 0.78rem;
    font-weight: 650;
}

body.ux-page-gestor-notas .container {
    overflow: visible;
}

body.ux-page-gestor-notas .button-row {
    position: sticky;
    bottom: 0;
    z-index: 30;
    margin: 14px -6px -4px;
    padding: 12px 6px 6px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0), #ffffff 28%);
}

body.ux-page-gestor-notas .nota-input,
body.ux-page-gestor-notas .ce-nota-input {
    scroll-margin-top: 120px;
}

body.ux-page-incluir-actividad .mode-tabs {
    display: inline-flex;
    gap: 4px;
    margin: 0 0 14px;
    padding: 4px;
    border: 1px solid var(--ux-border);
    border-radius: 8px;
    background: #f8fafc;
}

body.ux-page-incluir-actividad .mode-tab {
    min-height: 34px;
    padding: 7px 12px;
    border: 0;
    border-radius: 6px;
    color: #475569;
    background: transparent;
    font-weight: 800;
}

body.ux-page-incluir-actividad .mode-tab.active {
    color: #ffffff;
    background: #4f46e5;
}

body.ux-page-incluir-actividad .mode-panel[hidden],
body.ux-page-incluir-actividad [data-mode-panel][hidden] {
    display: none !important;
}

.ux-field-help {
    margin-top: 6px;
    color: var(--ux-muted);
    font-size: 0.78rem;
    font-weight: 600;
}

.teacher-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 10px;
    margin: 0 0 14px;
}

.teacher-alert {
    min-height: 78px;
    padding: 12px 13px;
    border: 1px solid var(--ux-border);
    border-left: 4px solid var(--ux-primary);
    border-radius: 7px;
    background: #ffffff;
}

.teacher-alert.success {
    border-left-color: var(--ux-success);
    background: #f0fdf4;
}

.teacher-alert.warning {
    border-left-color: #f59e0b;
    background: #fffbeb;
}

.teacher-alert.danger {
    border-left-color: #ef4444;
    background: #fff1f2;
}

.teacher-alert.info {
    border-left-color: #0f766e;
    background: #ecfdf5;
}

.teacher-alert strong {
    display: block;
    margin-bottom: 4px;
    color: #111827;
    font-size: 0.92rem;
}

.teacher-alert p {
    margin: 0;
    color: var(--ux-muted);
    font-size: 0.82rem;
    line-height: 1.35;
}

.teacher-alert-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 9px;
}

.teacher-alert button,
.teacher-alert a,
.mini-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 30px;
    padding: 5px 9px;
    border: 1px solid #c7d2fe;
    border-radius: 6px;
    color: var(--ux-primary);
    background: #ffffff;
    font: inherit;
    font-size: 0.78rem;
    font-weight: 800;
    text-decoration: none;
    cursor: pointer;
}

.teacher-alert button:hover,
.teacher-alert a:hover,
.mini-action:hover {
    border-color: var(--ux-primary);
    background: #eef2ff;
}

.quick-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    margin: 0 0 14px;
}

.quick-filter {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    min-height: 34px;
    padding: 7px 11px;
    border: 1px solid #d1d5db;
    border-radius: 999px;
    color: #374151;
    background: #ffffff;
    font: inherit;
    font-size: 0.84rem;
    font-weight: 800;
    cursor: pointer;
}

.quick-filter.active {
    color: #ffffff;
    border-color: var(--ux-primary);
    background: var(--ux-primary);
}

.quick-filter:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.quick-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 22px;
    min-height: 22px;
    padding: 0 6px;
    border-radius: 999px;
    color: #1f2937;
    background: #eef2ff;
    font-size: 0.74rem;
}

.quick-filter.active .quick-count {
    color: var(--ux-primary);
    background: #ffffff;
}

.save-meta {
    color: var(--ux-muted);
    font-size: 0.8rem;
    font-weight: 700;
}

.report-col {
    width: 96px;
    text-align: center;
}

.detail-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    justify-content: flex-end;
}

.ra-risk-note {
    color: #92400e;
    font-size: 0.78rem;
    font-weight: 800;
}

@media (max-width: 720px) {
    body.ux-app-shell {
        padding: 10px;
    }

    .ux-content {
        padding: 16px;
    }

    .ux-toolbar {
        grid-template-columns: 1fr !important;
    }

    .ux-summary {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .app-ux-status {
        right: 10px;
        bottom: 10px;
        left: 10px;
        max-width: none;
    }

    body.ux-page-incluir-actividad .mode-tabs {
        width: 100%;
        display: grid;
        grid-template-columns: 1fr 1fr;
    }

    .teacher-panel {
        grid-template-columns: 1fr;
    }

    .quick-filters {
        gap: 6px;
    }

    .quick-filter {
        flex: 1 1 calc(50% - 6px);
        justify-content: space-between;
    }
}