/* ==============================
   UTILITIES
================================ */

.text-center {
    text-align: center;
}

.text-muted {
    color: var(--color-text-300);
}

.mt-2 {
    margin-top: var(--space-2);
}

.mb-3 {
    margin-bottom: var(--space-3);
}

.hidden {
    display: none !important;
}

.wl-section-panel {
    display: block;
}

.wl-section-panel.hidden {
    display: none !important;
}

/* Layout utilities (replace inline style attributes for CSP) */
.block { display: block; }
.flex { display: flex; }
.inline-block { display: inline-block; }
.text-left { text-align: left; }
.card-padded { padding: 1.5rem; }
.divider { margin: 2rem 0; border: 0; border-top: 1px solid var(--glass-border); }
.pad-x-1 { padding-left: 1rem; padding-right: 1rem; }
.text-warning { color: var(--color-warning); }
.banner-invites { margin: 1rem; padding: 1rem; background: var(--accent-amber, var(--color-accent-amber)); color: var(--color-gray-900); justify-content: space-between; align-items: center; }
.onboarding-box { margin: 20px 0; text-align: left; background: rgba(0,0,0,0.2); padding: 15px; border-radius: 8px; }
.onboarding-list { margin-left: 20px; list-style-type: disc; }
.btn-min-width { min-width: 150px; }
.card-welcome { margin-bottom: 1.5rem; padding: 1.25rem; }
.welcome-title { margin-top: 0; color: var(--accent-amber); }
.welcome-p { margin-bottom: 0; }
.header-between { justify-content: space-between; align-items: center; }
.mt-1 { margin-top: 1rem; }
.auth-footer-row { justify-content: space-between; margin-top: 1rem; }
.auth-footer-small { font-size: 0.8em; }
.auth-footer-p { font-size: 0.9em; margin-bottom: 1rem; }

/* Academy / CSP: replace inline style attributes in JS template literals */
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mt-075 { margin-top: 0.75rem; }
.mt-05 { margin-top: 0.5rem; }
.ml-05 { margin-left: 0.5rem; }
.flex-wrap { flex-wrap: wrap; }
.gap-1 { gap: 10px; }
.gap-2 { gap: 8px; }
.gap-05 { gap: 0.5rem; }
.gap-025 { gap: 0.25rem; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.align-end { align-items: flex-end; }
.pad-2rem { padding: 2rem; }
.text-sm { font-size: 0.9rem; }
.text-8em { font-size: 0.8em; }
.font-mono { font-family: monospace; }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.mr-05 { margin-right: 0.5rem; }
.flex-1 { flex: 1; }
.text-right { text-align: right; }
.mt-1 { margin-top: 1rem; }

.academy-banner-readonly { background: var(--accent-amber, var(--color-accent-amber)); color: var(--color-gray-900); padding: 0.5rem 1rem; text-align: center; border-radius: 4px; margin-bottom: 1rem; font-weight: bold; }
.academy-banner-frozen { background: var(--color-accent-warning); color: black; padding: 0.5rem; text-align: center; border-radius: 4px; margin-bottom: 1rem; font-weight: bold; }
.academy-header-row { display: flex; justify-content: space-between; align-items: flex-end; border-bottom: 1px solid var(--glass-border); margin-bottom: 1rem; }
.flex.justify-between { justify-content: space-between; }
.flex.align-center { align-items: center; }
.tabs-inline { border-bottom: none; margin-bottom: 0; }
.tabs-mb-1 { margin-bottom: 1rem; border-bottom: none; }
.btn-accent-copper { color: var(--accent-copper); border-color: var(--accent-copper); }

.welcome-emoji { font-size: 3rem; margin-bottom: 1rem; }
.panel-glass { text-align: left; background: var(--color-glass-white-05); padding: 1.5rem; border-radius: 8px; margin: 1.5rem 0; }
.list-plain { margin: 0; padding-left: 1.5rem; line-height: 1.6; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 1rem; }
.panel-status { margin-top: 1.5rem; background: var(--color-glass-white-05); padding: 1rem; border-radius: 4px; }
.scroll-y { max-height: 70vh; overflow-y: auto; padding-right: 0.5rem; }

.card-mb-1 { margin-bottom: 1rem; padding: 1rem; }
.card-mb-2 { margin-bottom: 2rem; }
.card-bg-glass { background: var(--color-glass-white-05); }
.card-mt-1 { margin-top: 1rem; padding: 1rem; background: var(--color-glass-white-03); }
.card-mt-05 { margin-top: 0.5rem; padding: 1rem; background: var(--color-glass-white-03); }

.input-search { padding: 6px 10px; min-width: 200px; }
.list-warning { margin: 0; padding-left: 1.25rem; }
.badge-bg-700 { background: var(--color-bg-700); }
.calendar-wrap { max-width: 900px; margin-top: 1rem; background: var(--color-glass-white-03); border-radius: 8px; padding: 1rem; }

.table-full { width: 100%; text-align: left; }
.table-sm { font-size: 0.9em; }
.table-th { border-bottom: 1px solid var(--color-gray-700); }
.table-tr { border-bottom: 1px solid var(--color-gray-800); }
.table-td { padding: 10px; }
.table-td-8 { padding: 8px; }

.settings-mt-1 { margin-top: 1rem; }
.banner-preview { width: 100%; height: 100px; background-size: cover; display: flex; align-items: center; justify-content: center; border-radius: 8px; }
.banner-preview-title { text-shadow: 0 2px 4px black; color: var(--color-text-on-solid); }
.settings-section-top { margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--glass-border); }
.upload-zone-dashed { border: 2px dashed var(--glass-border); padding: 1.5rem; text-align: center; border-radius: 8px; cursor: pointer; min-height: 80px; }
.logo-current { margin-bottom: 0.5rem; }
.input-color-picker { width: 48px; height: 36px; padding: 2px; cursor: pointer; border-radius: 4px; }
.input-hex { width: 100px; }
.contrast-warning { display: none; color: var(--color-warning); font-size: 0.8rem; margin-top: 0.5rem; }
.logo-hint { color: var(--color-text-300); font-size: 0.875rem; }

.class-detail-row { display: flex; justify-content: space-between; align-items: flex-start; }
.badge-block { display: block; margin-bottom: 0.5rem; }
.panel-plan { background: rgba(0,0,0,0.2); padding: 0.5rem; border-radius: 4px; margin-top: 0.5rem; }
.plan-select { padding: 2px; font-size: 0.8em; max-width: 150px; }
.divider-444 { margin-top: 2rem; padding-top: 1rem; border-top: 1px solid var(--color-gray-700); }

.curriculum-panel { background: var(--color-glass-white-05); padding: 1rem; border-radius: 8px; }
.curriculum-resources { margin-bottom: 1.5rem; border-bottom: 1px solid var(--color-gray-600); padding-bottom: 1rem; }
.list-none { list-style: none; padding-left: 0; }
.resource-item { margin-bottom: 0.5rem; padding: 0.5rem; background: rgba(0,0,0,0.2); border-radius: 4px; }
.resource-link { font-weight: bold; color: var(--color-primary); }
.resource-meta { font-size: 0.8em; color: var(--color-gray-400); margin-left: 0.5rem; }
.module-heading { color: var(--accent-amber); border-bottom: 1px solid var(--color-gray-700); padding-bottom: 0.25rem; }
.list-curriculum { padding-left: 1rem; color: var(--color-gray-100); list-style: none; }
.module-row { margin-bottom: 0.5rem; display: flex; justify-content: space-between; align-items: center; background: rgba(0,0,0,0.1); padding: 0.5rem; border-radius: 4px; }
.module-item[data-locked="true"] { opacity: 0.5; pointer-events: none; }
.float-right { float: right; }

/* Messaging / Phase B (12.17.2) */
.messaging-container { display: flex; height: 80vh; height: 80dvh; gap: 20px; }
@media (max-width: 767px) {
    .messaging-container { flex-direction: column; height: auto; gap: 10px; }
}
.flex-2 { flex: 2; }
.overflow-y-auto { overflow-y: auto; }
.flex-col { flex-direction: column; }
.mb-075 { margin-bottom: 0.75rem; }
.label-inline { display: flex; align-items: center; gap: 4px; font-size: 0.9em; }
.select-sm { padding: 4px 6px; }
.min-w-120 { min-width: 120px; }
.place-center { display: flex; align-items: center; justify-content: center; }
.text-muted-888 { color: var(--color-gray-400); }
.pad-10 { padding: 10px; }
.mb-15 { margin-bottom: 15px; }
.mt-20 { margin-top: 20px; }
.msg-body-pad { padding: 20px; white-space: pre-wrap; }
.challenge-card { border: 1px solid var(--accent-gold); padding: 1rem; margin-bottom: 1rem; border-radius: 4px; background: rgba(224, 170, 62, 0.1); }
.challenge-card h4 { color: var(--accent-gold); }
.message-context-card { border: 1px solid var(--accent-copper); padding: 1rem; margin-bottom: 1rem; border-radius: 4px; background: rgba(184, 134, 11, 0.08); }
.message-context-card h4 { color: var(--accent-amber); }
.meta-divider { margin-bottom: 1rem; padding-bottom: 1rem; border-bottom: 1px solid var(--color-gray-700); }

/* Site admin / Social / Settings (12.17.3) */
.gap-12 { gap: 12px; }
.select-sm-8 { padding: 4px 8px; width: auto; min-height: 36px; margin-bottom: 0; }
.min-w-160 { min-width: 160px; }
.min-w-280 { min-width: 280px; }
.min-w-180 { min-width: 180px; }
.min-w-80 { min-width: 80px; }
.table-td-12 { padding: 12px; }
.table-th-amber { padding: 12px; color: var(--accent-amber); }
.table-border-copper { border-bottom: 2px solid var(--accent-copper); }
.modal-max-w-400 { max-width: 400px; }
.flex-end-gap { margin-top: 1rem; display: flex; justify-content: flex-end; gap: 8px; }
.list-indent { margin: 0; padding-left: 1.2rem; }
.mt-0 { margin-top: 0; }
.text-85 { font-size: 0.85em; }
.ml-6 { margin-left: 6px; }
.text-amber { color: var(--accent-amber); }
.mt-10 { margin-top: 10px; }
.pad-1rem { padding: 1rem; }
.form-group-mt-2 { margin-top: 2rem; }
.text-666 { color: var(--color-gray-500); }
.select-pad-5 { padding: 5px; }
.table-collapse { width: 100%; border-collapse: collapse; text-align: left; }
.tr-border-glass { border-bottom: 1px solid var(--glass-border); }
.ml-6px { margin-left: 6px; }

/* Table overflow protection for mobile (Phase 55.3) */
.table-responsive { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* Screen-reader-only (skip-nav, a11y labels) — WCAG 2.4.1 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}
.sr-only:focus {
    position: fixed;
    top: 0;
    left: 0;
    width: auto;
    height: auto;
    padding: 0.75rem 1.5rem;
    margin: 0;
    overflow: visible;
    clip: auto;
    white-space: normal;
    background: var(--color-bg-900);
    color: var(--color-text-100);
    z-index: 10000;
    font-size: 1rem;
}

@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
    }
}