/* Teacher Pro — separate dashboard theme */
.ai-study-teacher-dashboard {
    --teacher-accent: #7C3AED;
    --teacher-accent-soft: #EDE9FE;
    --teacher-accent-border: #C4B5FD;
    --teacher-sidebar-width: 280px;
}

/* Reset student rainbow / overflow styles inside teacher dashboard */
.ai-study-teacher-dashboard .ai-study-shell {
    display: grid !important;
    grid-template-columns: var(--teacher-sidebar-width) minmax(0, 1fr) !important;
    grid-template-areas: 'teacher-sidebar teacher-main';
    min-height: 720px;
    overflow: visible !important;
    background: var(--section-bg) !important;
    border: 1px solid var(--card-border) !important;
    border-radius: var(--radius-lg, 16px) !important;
    box-shadow: var(--shadow, 0 12px 30px rgba(15, 23, 42, 0.08)) !important;
    position: relative;
    isolation: isolate;
}

.ai-study-teacher-dashboard .ai-study-tabs.ai-study-teacher-sidebar {
    display: flex;
    flex-direction: column;
    grid-area: teacher-sidebar;
    min-height: 0;
    max-height: none;
    padding: 14px;
    overflow: hidden;
    background: var(--section-bg) !important;
    border-right: 1px solid var(--card-border) !important;
    box-shadow: none !important;
    position: relative;
    z-index: 20;
    pointer-events: auto !important;
}

.ai-study-teacher-dashboard .ai-study-teacher-profile {
    flex: 0 0 auto;
    margin-bottom: 12px;
}

.ai-study-teacher-dashboard .ai-study-teacher-nav {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex: 1 1 auto;
    min-height: 0;
    max-height: calc(100vh - 260px);
    overflow-x: hidden;
    overflow-y: auto;
    padding-right: 4px;
    -webkit-overflow-scrolling: touch;
    pointer-events: auto !important;
}

.ai-study-teacher-dashboard .ai-study-teacher-tab {
    display: flex !important;
    align-items: flex-start;
    gap: 10px;
    width: 100%;
    min-height: 44px;
    margin: 0 !important;
    padding: 10px 12px !important;
    overflow: visible !important;
    white-space: normal !important;
    text-align: left !important;
    line-height: 1.35 !important;
    border: 1px solid transparent !important;
    border-radius: 10px !important;
    background: transparent !important;
    color: var(--text-secondary) !important;
    box-shadow: none !important;
    transform: none !important;
    font-size: 13px !important;
    font-weight: 600 !important;
    cursor: pointer !important;
    pointer-events: auto !important;
    touch-action: manipulation;
    position: relative;
    z-index: 3;
    -webkit-tap-highlight-color: transparent;
}

.ai-study-teacher-dashboard .ai-study-teacher-tab::before {
    display: none !important;
}

.ai-study-teacher-dashboard .ai-study-teacher-tab:hover {
    background: var(--sidebar-hover-bg, #f1f5f9) !important;
    color: var(--teacher-accent) !important;
    border-color: var(--teacher-accent-border) !important;
    transform: none !important;
}

.ai-study-teacher-dashboard .ai-study-teacher-tab.is-active,
.ai-study-teacher-dashboard .ai-study-teacher-tab.active {
    background: var(--teacher-accent-soft) !important;
    color: var(--teacher-accent) !important;
    border-color: var(--teacher-accent-border) !important;
    font-weight: 700 !important;
    box-shadow: none !important;
}

.ai-study-teacher-dashboard .ai-study-teacher-tab .icon {
    flex: 0 0 24px;
    width: 24px;
    text-align: center;
    line-height: 1.2;
    font-size: 16px;
}

.ai-study-teacher-dashboard .ai-study-teacher-tab .title {
    display: block !important;
    flex: 1 1 auto;
    min-width: 0;
    overflow: visible !important;
    text-overflow: unset !important;
    white-space: normal !important;
    line-height: 1.35 !important;
    word-break: break-word;
}

.ai-study-teacher-dashboard .ai-study-teacher-main {
    grid-area: teacher-main;
    min-width: 0;
    max-width: 100%;
    overflow-x: hidden;
    position: relative;
    z-index: 1;
    pointer-events: auto;
}

.ai-study-teacher-dashboard .ai-study-teacher-panel.is-active {
    display: block;
}

.ai-study-teacher-dashboard .ai-study-teacher-badge {
    display: inline-block;
    margin: 8px 0;
    padding: 4px 12px;
    border-radius: 999px;
    background: var(--teacher-accent-soft);
    color: var(--teacher-accent);
    font-size: 12px;
    font-weight: 800;
}

.ai-study-teacher-sidebar {
    border-right: 1px solid var(--card-border);
}

.ai-study-teacher-mobile-menu .ai-study-teacher-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    min-height: 88px;
    padding: 12px 8px;
    overflow: visible;
    text-align: center;
    pointer-events: auto !important;
    cursor: pointer !important;
    touch-action: manipulation;
}

.ai-study-teacher-mobile-menu .ai-study-teacher-tab .title {
    display: block;
    font-size: 12px;
    line-height: 1.25;
    overflow: visible;
    white-space: normal;
}

.ai-study-teacher-tab.is-premium .title::after {
    content: ' ★';
    color: #F59E0B;
    font-size: 11px;
}

.ai-study-teacher-tab .icon {
    flex-shrink: 0;
    width: 28px;
    text-align: center;
}

.ai-study-teacher-stat-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}

.ai-study-teacher-ai-box {
    padding: 16px;
    border-radius: 14px;
    border: 1px solid var(--teacher-accent-border);
    background: color-mix(in srgb, var(--teacher-accent) 8%, var(--card-bg));
}

.ai-study-teacher-ai-box strong {
    display: block;
    margin-bottom: 6px;
    color: var(--teacher-accent);
}

.ai-study-teacher-input-window {
    margin: 16px 0;
    padding: 16px;
    border-radius: 14px;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
}

.ai-study-teacher-input-hint {
    margin: 0 0 12px;
    font-size: 13px;
}

.ai-study-teacher-upload-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 12px;
}

.ai-study-teacher-dashboard .ai-study-camera-voice-bar {
    margin-bottom: 14px;
}

.ai-study-teacher-dashboard .ai-study-upload-button--secondary {
    background: var(--teacher-accent-soft);
    border-color: var(--teacher-accent-border);
    color: var(--teacher-accent);
}

.ai-study-teacher-tool-form {
    display: grid;
    gap: 12px;
    margin: 16px 0;
}

.ai-study-teacher-prompt-label textarea {
    min-height: 110px;
    width: 100%;
}

@media (max-width: 768px) {
    .ai-study-teacher-upload-row {
        flex-direction: column;
    }

    .ai-study-teacher-upload-row .ai-study-upload-button {
        width: 100%;
        justify-content: center;
    }
}

/* Digital Diary */
.ai-study-digital-diary .ai-study-diary-book {
    margin: 16px 0;
    padding: 18px;
    border-radius: 14px;
    border: 2px solid color-mix(in srgb, var(--teacher-accent) 35%, var(--card-border));
    background: linear-gradient(180deg, color-mix(in srgb, var(--teacher-accent) 6%, var(--card-bg)) 0%, var(--card-bg) 100%);
}

.ai-study-diary-book__header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 14px;
}

.ai-study-diary-book__badge {
    font-weight: 700;
    font-size: 15px;
    color: var(--teacher-accent);
}

.ai-study-diary-date-label input {
    max-width: 180px;
}

.ai-study-teacher-api-hint {
    margin: 0 0 12px;
    font-size: 12px;
    color: var(--teacher-accent, #4f46e5);
}

.ai-study-diary-autofill-hint {
    margin: 0 0 10px;
    font-size: 13px;
}

.ai-study-diary-autofill-btn {
    margin: 0 0 16px;
}

.ai-study-diary-note-block {
    margin-top: 8px;
    padding: 14px;
    border-radius: 12px;
    border: 2px solid #f59e0b;
    background: #fffbeb;
}

.ai-study-diary-note-label strong {
    display: block;
    font-size: 1.05rem;
    color: #b45309;
    margin-bottom: 4px;
}

.ai-study-diary-note-label .ai-study-muted {
    display: block;
    margin-bottom: 8px;
    font-size: 12px;
}

.ai-study-diary-actions {
    margin: 12px 0 20px;
}

.ai-study-diary-status {
    margin: 8px 0 0;
    min-height: 1.2em;
}

.ai-study-diary-share-panel {
    margin: 20px 0;
    padding: 16px;
    border-radius: 14px;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
}

.ai-study-diary-share-panel h3,
.ai-study-diary-list-wrap h3 {
    margin: 0 0 10px;
    font-size: 1.05rem;
}

.ai-study-diary-share-audience {
    border: none;
    margin: 0 0 14px;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.ai-study-diary-share-audience legend {
    width: 100%;
    font-weight: 600;
    margin-bottom: 6px;
}

.ai-study-diary-share-url-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.ai-study-diary-share-url {
    flex: 1 1 200px;
    min-width: 0;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--card-border);
    background: var(--input-bg, #fff);
    font-size: 13px;
}

.ai-study-diary-share-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.ai-study-diary-list {
    display: grid;
    gap: 10px;
}

.ai-study-diary-list-item {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
}

.ai-study-diary-list-item__meta strong {
    display: block;
}

.ai-study-diary-list-item__meta span {
    font-size: 12px;
    color: var(--muted-text, #64748b);
}

.ai-study-diary-list-item__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.ai-study-diary-badge-shared {
    display: inline-block;
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 999px;
    background: color-mix(in srgb, #22c55e 15%, transparent);
    color: #15803d;
    margin-left: 6px;
}

@media (max-width: 768px) {
    .ai-study-diary-share-url-row {
        flex-direction: column;
    }

    .ai-study-diary-share-url-row .ai-study-secondary-button {
        width: 100%;
    }
}

.ai-study-teacher-soon {
    font-size: 12px;
    margin: 0;
}

.ai-study-teacher-backup-bar {
    margin: 0 0 16px;
    padding: 14px 16px;
    border-radius: 14px;
    border: 1px solid var(--card-border);
    background: linear-gradient(135deg, color-mix(in srgb, var(--teacher-accent) 8%, var(--card-bg)), var(--card-bg));
}

.ai-study-usage-upgrade-banner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin: 0 0 16px;
    padding: 14px 16px;
    border-radius: 14px;
    border: 1px solid #fbbf24;
    background: linear-gradient(135deg, #fffbeb, #fff);
}

.ai-study-usage-upgrade-banner.is-exhausted {
    border-color: #f87171;
    background: linear-gradient(135deg, #fef2f2, #fff);
}

.ai-study-usage-upgrade-banner__body strong {
    display: block;
    margin-bottom: 4px;
}

.ai-study-usage-upgrade-banner__body p {
    margin: 0;
    font-size: 13px;
    color: var(--muted-text, #64748b);
}

.ai-study-teacher-usage-card {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    padding: 14px;
    border: 1px solid var(--card-border);
    border-radius: 14px;
    background: var(--card-bg);
}

.ai-study-teacher-usage-card .ai-study-usage-meter {
    flex: 1 1 240px;
    margin: 0;
}

.ai-study-teacher-profile .ai-study-usage-block,
.ai-study-teacher-dashboard .ai-study-user-info .ai-study-usage-block {
    width: 100%;
    margin-top: 8px;
}

.ai-study-teacher-profile .ai-study-usage-meter,
.ai-study-teacher-dashboard .ai-study-user-info .ai-study-usage-meter {
    margin: 0 0 8px;
    width: 100%;
}

.ai-study-usage-upgrade-btn {
    width: 100%;
    margin-top: 4px;
}

.ai-study-teacher-school-hub .ai-study-teacher-share-bar,
.ai-study-teacher-school-hub .ai-study-teacher-backup-bar {
    margin-bottom: 16px;
}

.ai-study-teacher-profile .ai-study-usage-meter {
    margin: 12px 0;
    width: 100%;
}

.ai-study-teacher-subscription .ai-study-subscription-grid {
    margin-top: 12px;
}

.ai-study-teacher-share-bar {
    margin: 0 0 16px;
    padding: 14px 16px;
    border-radius: 14px;
    border: 1px solid var(--teacher-accent-border, #c4b5fd);
    background: linear-gradient(135deg, color-mix(in srgb, #2563eb 6%, var(--card-bg)), var(--card-bg));
}

.ai-study-teacher-share-bar__head span {
    display: block;
    font-weight: 700;
}

.ai-study-teacher-share-bar__head small {
    color: var(--muted-text, #64748b);
    font-size: 12px;
}

.ai-study-teacher-share-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 12px;
}

.ai-study-teacher-share-grid label,
.ai-study-teacher-share-message {
    display: grid;
    gap: 6px;
    font-size: 13px;
}

.ai-study-teacher-share-uploads {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    margin: 12px 0;
}

.ai-study-teacher-share-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.ai-study-teacher-share-result {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 12px;
}

.ai-study-output-window__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.ai-study-student-inbox {
    margin: 20px 0;
    padding: 16px;
    border: 1px solid var(--card-border);
    border-radius: 14px;
    background: var(--card-bg);
}

.ai-study-student-inbox-item {
    padding: 12px 0;
    border-bottom: 1px solid var(--card-border);
}

.ai-study-student-inbox-item:last-child {
    border-bottom: 0;
}

@media (max-width: 768px) {
    .ai-study-teacher-share-grid {
        grid-template-columns: 1fr;
    }
}

.ai-study-teacher-backup-bar__title span {
    display: block;
    font-weight: 700;
}

.ai-study-teacher-backup-bar__title small {
    color: var(--muted-text, #64748b);
    font-size: 12px;
}

.ai-study-teacher-backup-bar__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    margin-top: 10px;
}

.ai-study-backup-email-input {
    min-width: 200px;
    flex: 1 1 180px;
    padding: 8px 10px;
    border-radius: 10px;
    border: 1px solid var(--card-border);
}

.ai-study-backup-auto-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
}

.ai-study-student-lookup-card--global {
    position: sticky;
    top: 8px;
    z-index: 20;
    margin: 0 0 12px;
    padding: 12px 14px;
    border-radius: 12px;
    border: 2px solid var(--teacher-accent-border);
    background: #eff6ff;
}

.ai-study-register-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 14px;
}

.ai-study-register-search {
    flex: 1 1 200px;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--card-border);
}

.ai-study-register-layout {
    display: grid;
    grid-template-columns: minmax(220px, 280px) 1fr;
    gap: 16px;
}

.ai-study-register-list-wrap {
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 12px;
    max-height: 520px;
    overflow: auto;
}

.ai-study-register-list-item {
    display: block;
    width: 100%;
    text-align: left;
    margin: 0 0 8px;
    padding: 10px;
    border-radius: 10px;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    color: var(--text-primary) !important;
    cursor: pointer;
}

.ai-study-register-list-item strong {
    display: block;
    color: var(--heading, var(--text-primary));
}

.ai-study-register-list-item span {
    font-size: 12px;
    color: var(--muted-text, #64748b);
}

.ai-study-register-form-wrap {
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 14px;
    color: var(--text-primary);
}

.ai-study-register-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 14px;
}

.ai-study-register-tabs button {
    padding: 8px 14px;
    border-radius: 999px;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    color: var(--text-primary) !important;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.25;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
}

.ai-study-register-tabs button:hover {
    background: var(--card-hover-bg);
    border-color: var(--teacher-accent-border);
    color: var(--teacher-accent) !important;
}

.ai-study-register-tabs button.is-active {
    background: var(--teacher-accent);
    color: #fff !important;
    border-color: var(--teacher-accent);
}

.ai-study-register-grid label,
.ai-study-register-inline-row label {
    color: var(--text-secondary) !important;
    font-weight: 600;
}

.ai-study-register-grid input,
.ai-study-register-grid select,
.ai-study-register-grid textarea,
.ai-study-register-inline-row input,
.ai-study-register-inline-row select,
.ai-study-register-search {
    background: var(--input-bg) !important;
    border: 1px solid var(--input-border) !important;
    color: var(--text-primary) !important;
    border-radius: 10px;
}

.ai-study-register-grid input::placeholder,
.ai-study-register-inline-row input::placeholder,
.ai-study-register-search::placeholder {
    color: var(--text-secondary);
    opacity: 0.9;
}

.ai-study-register-log-row {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    padding: 8px 0;
    border-bottom: 1px solid var(--card-border);
    font-size: 13px;
    color: var(--text-primary);
}

.ai-study-register-log-row span {
    color: var(--text-secondary);
}

.ai-study-register-log-row strong {
    color: var(--text-primary);
}

/* Light mode — register tabs readable on white pills */
html[data-theme="light"] .ai-study-teacher-dashboard .ai-study-register-tabs button:not(.is-active),
html:not([data-theme]) .ai-study-teacher-dashboard .ai-study-register-tabs button:not(.is-active),
.ai-study-teacher-dashboard[data-ai-study-theme="light"] .ai-study-register-tabs button:not(.is-active) {
    color: #0F172A !important;
    background: #FFFFFF !important;
    border-color: #CBD5E1 !important;
}

html[data-theme="light"] .ai-study-teacher-dashboard .ai-study-register-tabs button:not(.is-active):hover,
html:not([data-theme]) .ai-study-teacher-dashboard .ai-study-register-tabs button:not(.is-active):hover,
.ai-study-teacher-dashboard[data-ai-study-theme="light"] .ai-study-register-tabs button:not(.is-active):hover {
    color: var(--teacher-accent) !important;
    background: var(--teacher-accent-soft) !important;
    border-color: var(--teacher-accent-border) !important;
}

/* Dark mode — keep inactive tabs readable */
html[data-theme="dark"] .ai-study-teacher-dashboard .ai-study-register-tabs button:not(.is-active),
.ai-study-teacher-dashboard[data-ai-study-theme="dark"] .ai-study-register-tabs button:not(.is-active) {
    color: #EAF2FF !important;
    background: var(--card-bg) !important;
    border-color: var(--card-border) !important;
}

.ai-study-register-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.ai-study-register-grid label {
    display: grid;
    gap: 6px;
    font-size: 13px;
}

.ai-study-register-full {
    grid-column: 1 / -1;
}

.ai-study-register-inline-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

@media (max-width: 900px) {
    .ai-study-register-layout {
        grid-template-columns: 1fr;
    }

    .ai-study-register-grid {
        grid-template-columns: 1fr;
    }
}

.ai-study-teacher-mobile-menu {
    display: none;
}

/* Portal auth switcher */
.ai-study-portal-switch {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin: 0 0 20px;
    padding: 6px;
    border-radius: 16px;
    background: var(--card-active-bg, #f1f5f9);
    border: 1px solid var(--card-border, #e2e8f0);
}

.ai-study-portal-switch__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 48px;
    padding: 10px 12px;
    border: 2px solid transparent;
    border-radius: 12px;
    background: transparent;
    color: var(--text-secondary, #64748b);
    font-size: 14px;
    font-weight: 800;
    cursor: pointer;
    transition: background 160ms ease, border-color 160ms ease, color 160ms ease;
}

.ai-study-portal-switch__btn.is-active {
    background: var(--card-bg, #fff);
    border-color: var(--primary, #2563EB);
    color: var(--primary, #2563EB);
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.12);
}

.ai-study-portal-switch__btn[data-ai-study-portal-option="teacher"].is-active {
    border-color: var(--teacher-accent);
    color: var(--teacher-accent);
    box-shadow: 0 4px 14px rgba(124, 58, 237, 0.15);
}

.ai-study-portal-gate {
    max-width: 520px;
    margin: 40px auto;
    padding: 24px;
    border-radius: 16px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    text-align: center;
}

.ai-study-portal-gate__actions {
    margin: 16px 0 10px;
}

html[data-theme="dark"] .ai-study-teacher-dashboard,
.ai-study-dashboard[data-ai-study-theme="dark"] .ai-study-teacher-dashboard {
    --teacher-accent-soft: #4C1D95;
}

/* ===== Live Class (Zoom/Meet-style) ===== */
.ai-study-live-class-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 16px;
    margin-bottom: 16px;
}

.ai-study-live-class-schedule,
.ai-study-live-class-list-wrap {
    padding: 16px;
    border: 1px solid var(--card-border, #dce4ec);
    border-radius: 16px;
    background: var(--card-bg, #fff);
}

.ai-study-live-class-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.ai-study-live-class-form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.ai-study-live-class-list {
    display: grid;
    gap: 10px;
    max-height: 420px;
    overflow-y: auto;
}

.ai-study-live-class-item {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 12px;
    border: 1px solid var(--card-border, #e4eaf1);
    border-radius: 12px;
    background: var(--section-bg, #f8fafc);
}

.ai-study-live-class-item__body {
    display: grid;
    gap: 4px;
    min-width: 0;
    flex: 1 1 180px;
}

.ai-study-live-class-item__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.ai-study-live-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
    background: #e2e8f0;
    color: #334155;
}

.ai-study-live-badge--live {
    background: #fee2e2;
    color: #b91c1c;
    animation: aiStudyLivePulse 1.5s ease-in-out infinite;
}

.ai-study-live-badge--scheduled {
    background: #dbeafe;
    color: #1d4ed8;
}

@keyframes aiStudyLivePulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.65; }
}

.ai-study-live-room {
    margin-top: 16px;
    padding: 14px;
    border: 2px solid #6366f1;
    border-radius: 16px;
    background: #0f172a;
}

.ai-study-live-room__head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 10px;
    color: #f8fafc;
}

.ai-study-live-room__head .ai-study-muted {
    color: #cbd5e1;
}

.ai-study-live-room__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.ai-study-live-room__frame {
    width: 100%;
    min-height: 420px;
    height: min(70vh, 640px);
    border-radius: 12px;
    overflow: hidden;
    background: #111827;
}

.ai-study-live-room-hint {
    margin: 10px 0 0;
    color: #94a3b8 !important;
    font-size: 12px;
}

.ai-study-live-end-btn {
    border-color: #fca5a5 !important;
    color: #fecaca !important;
}

.ai-study-student-live-class {
    margin-bottom: 18px;
    padding: 16px;
    border: 1px solid var(--card-border, #dce4ec);
    border-radius: 16px;
    background: linear-gradient(135deg, #eef2ff, #fff);
}

.ai-study-student-live-class__head h3 {
    margin: 0 0 4px;
}

.ai-study-student-live-list {
    display: grid;
    gap: 10px;
    margin-top: 12px;
}

.ai-study-student-live-item {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 12px;
    border-radius: 12px;
    background: #fff;
    border: 1px solid #e2e8f0;
}

.ai-study-live-room--student {
    margin-top: 12px;
}

@media (max-width: 768px) {
    .ai-study-teacher-stat-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .ai-study-teacher-mobile-menu {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
        margin-top: 16px;
    }

    .ai-study-teacher-sidebar {
        display: none !important;
    }

    .ai-study-live-class-grid {
        grid-template-columns: 1fr;
    }

    .ai-study-live-class-form-row {
        grid-template-columns: 1fr;
    }

    .ai-study-live-room__frame {
        min-height: 320px;
        height: 55vh;
    }
}

@media (max-width: 480px) {
    .ai-study-portal-switch {
        grid-template-columns: 1fr;
    }

    .ai-study-teacher-stat-grid {
        grid-template-columns: 1fr;
    }
}