/* =====================================================
 * TTC Premium Dashboard Shell
 * Shared visual layer for student, teacher, parent,
 * school, and institution dashboards.
 * ===================================================== */

.ttc-premium-dashboard {
    --ttc-dashboard-max: 1440px;
    --ttc-dashboard-pad: clamp(18px, 2.4vw, 36px);
    --ttc-role-accent: var(--ttc-primary, #6366f1);
    --ttc-role-accent-rgb: var(--ttc-primary-rgb, 99, 102, 241);
    --ttc-premium-surface: rgba(255, 255, 255, 0.045);
    --ttc-premium-surface-soft: rgba(255, 255, 255, 0.035);
    --ttc-premium-border: rgba(var(--ttc-role-accent-rgb), 0.22);
    --ttc-premium-shadow: 0 18px 50px -34px rgba(2, 6, 23, 0.78);
    --ttc-premium-shadow-hover: 0 22px 54px -36px rgba(2, 6, 23, 0.82);
    width: min(100%, var(--ttc-dashboard-max));
    margin: 0 auto !important;
    padding: var(--ttc-dashboard-pad) !important;
    border-radius: 0 !important;
    color: var(--ttc-text-main) !important;
    background:
        radial-gradient(circle at 0 0, rgba(var(--ttc-role-accent-rgb), 0.14), transparent 34rem),
        linear-gradient(180deg, rgba(255, 255, 255, 0.035), transparent 18rem),
        var(--ttc-bg-page) !important;
}

.ttc-theme-light .ttc-premium-dashboard,
.ttc-premium-dashboard.ttc-mode-light {
    --ttc-premium-surface: rgba(255, 255, 255, 0.92);
    --ttc-premium-surface-soft: #ffffff;
    --ttc-premium-shadow: 0 18px 48px -38px rgba(15, 23, 42, 0.5);
    --ttc-premium-shadow-hover: 0 24px 56px -42px rgba(15, 23, 42, 0.58);
}

.ttc-premium-dashboard.ttc-role-student {
    --ttc-role-accent: var(--portal-primary, var(--ttc-primary, #6366f1));
    --ttc-role-accent-rgb: var(--ttc-primary-rgb, 99, 102, 241);
}

.ttc-premium-dashboard.ttc-role-teacher {
    --ttc-role-accent: #10b981;
    --ttc-role-accent-rgb: 16, 185, 129;
}

.ttc-premium-dashboard.ttc-role-parent {
    --ttc-role-accent: #f59e0b;
    --ttc-role-accent-rgb: 245, 158, 11;
}

.ttc-premium-dashboard.ttc-role-school {
    --ttc-role-accent: #3b82f6;
    --ttc-role-accent-rgb: 59, 130, 246;
}

.ttc-premium-dashboard.ttc-role-institution {
    --ttc-role-accent: #8b5cf6;
    --ttc-role-accent-rgb: 139, 92, 246;
}

.ttc-premium-dashboard .ttc-db-header,
.ttc-premium-dashboard .ttc-dash-header {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    gap: clamp(16px, 2vw, 28px) !important;
    margin: 0 0 18px !important;
    padding: 18px 20px !important;
    border: 1px solid var(--ttc-premium-border) !important;
    border-radius: 18px !important;
    background: linear-gradient(135deg, rgba(var(--ttc-role-accent-rgb), 0.08), rgba(255, 255, 255, 0.025)) !important;
    box-shadow: var(--ttc-premium-shadow) !important;
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
}

.ttc-premium-dashboard .ttc-db-header h1,
.ttc-premium-dashboard .ttc-dash-header h1,
.ttc-premium-dashboard .ttc-h1 {
    margin: 0 !important;
    font-size: clamp(24px, 2.2vw, 34px) !important;
    line-height: 1.08 !important;
    letter-spacing: 0 !important;
}

.ttc-premium-dashboard .ttc-badge-premium,
.ttc-premium-dashboard .ttc-role-badge {
    width: fit-content;
    padding: 7px 11px !important;
    border: 1px solid rgba(var(--ttc-role-accent-rgb), 0.28) !important;
    border-radius: 999px !important;
    background: rgba(var(--ttc-role-accent-rgb), 0.13) !important;
    color: var(--ttc-role-accent) !important;
    font-size: 10px !important;
    font-weight: 850 !important;
    letter-spacing: 0.08em !important;
    text-transform: uppercase !important;
    box-shadow: none !important;
}

.ttc-premium-dashboard .ttc-db-nav,
.ttc-premium-dashboard .ttc-dash-nav {
    margin: 0 0 24px !important;
    padding: 8px !important;
    border: 1px solid var(--ttc-premium-border) !important;
    border-radius: 16px !important;
    background: rgba(255, 255, 255, 0.045) !important;
    box-shadow: none !important;
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
}

.ttc-premium-dashboard .ttc-nav-scroll-container {
    display: flex !important;
    gap: 6px !important;
    overflow-x: auto !important;
    scrollbar-width: none;
}

.ttc-premium-dashboard .ttc-nav-scroll-container::-webkit-scrollbar {
    display: none;
}

.ttc-premium-dashboard .ttc-db-tab,
.ttc-premium-dashboard .ttc-nav-item,
.ttc-premium-dashboard .ttc-dash-nav a,
.ttc-premium-dashboard .ttc-db-nav a {
    min-height: 38px !important;
    height: auto !important;
    padding: 0 13px !important;
    border: 1px solid transparent !important;
    border-radius: 11px !important;
    color: var(--ttc-text-muted) !important;
    background: transparent !important;
    font-size: 12px !important;
    font-weight: 760 !important;
    letter-spacing: 0 !important;
    line-height: 38px !important;
    text-decoration: none !important;
    white-space: nowrap !important;
    box-shadow: none !important;
}

.ttc-premium-dashboard .ttc-db-tab:hover,
.ttc-premium-dashboard .ttc-nav-item:hover,
.ttc-premium-dashboard .ttc-dash-nav a:hover,
.ttc-premium-dashboard .ttc-db-nav a:hover {
    color: var(--ttc-text-main) !important;
    background: rgba(var(--ttc-role-accent-rgb), 0.1) !important;
    border-color: rgba(var(--ttc-role-accent-rgb), 0.18) !important;
}

.ttc-premium-dashboard .ttc-db-tab.active,
.ttc-premium-dashboard .ttc-nav-item.active,
.ttc-premium-dashboard .ttc-dash-nav a.active,
.ttc-premium-dashboard .ttc-db-nav a.active {
    color: #fff !important;
    background: linear-gradient(135deg, var(--ttc-role-accent), rgba(var(--ttc-role-accent-rgb), 0.72)) !important;
    border-color: transparent !important;
    box-shadow: 0 10px 26px -18px rgba(var(--ttc-role-accent-rgb), 0.85) !important;
}

.ttc-premium-dashboard .ttc-premium-card,
.ttc-premium-dashboard .ttc-panel,
.ttc-premium-dashboard .ttc-card,
.ttc-premium-dashboard .ttc-stat-card,
.ttc-premium-dashboard .ttc-stat-premium,
.ttc-premium-dashboard .ttc-dashboard-fold,
.ttc-premium-dashboard .ttc-today-path,
.ttc-premium-dashboard .ttc-curriculum-map,
.ttc-premium-dashboard .ttc-edu-stage-panel,
.ttc-premium-dashboard .ttc-study-mode-strip,
.ttc-premium-dashboard .ttc-next-step-card,
.ttc-premium-dashboard .ttc-portal-hero {
    border: 1px solid var(--ttc-premium-border) !important;
    border-radius: 16px !important;
    background: var(--ttc-premium-surface-soft) !important;
    box-shadow: var(--ttc-premium-shadow) !important;
}

.ttc-premium-dashboard .ttc-portal-hero,
.ttc-premium-dashboard .ttc-next-step-card {
    background:
        linear-gradient(135deg, rgba(var(--ttc-role-accent-rgb), 0.14), rgba(255, 255, 255, 0.035)),
        var(--ttc-premium-surface-soft) !important;
}

.ttc-premium-dashboard .ttc-stat-card.highlight,
.ttc-premium-dashboard .ttc-stat-premium.highlight,
.ttc-premium-dashboard .ttc-study-mode-card.is-primary {
    background: linear-gradient(135deg, var(--ttc-role-accent), rgba(var(--ttc-role-accent-rgb), 0.72)) !important;
    border-color: transparent !important;
    color: #fff !important;
}

.ttc-premium-dashboard .ttc-premium-card:hover,
.ttc-premium-dashboard .ttc-panel:hover,
.ttc-premium-dashboard .ttc-stat-card:hover,
.ttc-premium-dashboard .ttc-stat-premium:hover,
.ttc-premium-dashboard .ttc-study-mode-card:hover,
.ttc-premium-dashboard .ttc-curriculum-card:hover,
.ttc-premium-dashboard .ttc-today-step:hover {
    transform: translateY(-2px) !important;
    border-color: rgba(var(--ttc-role-accent-rgb), 0.34) !important;
    box-shadow: var(--ttc-premium-shadow-hover) !important;
}

.ttc-premium-dashboard h2,
.ttc-premium-dashboard h3,
.ttc-premium-dashboard h4 {
    letter-spacing: 0 !important;
}

.ttc-premium-dashboard .label,
.ttc-premium-dashboard label,
.ttc-premium-dashboard .ttc-label,
.ttc-premium-dashboard .ttc-portal-kicker,
.ttc-premium-dashboard .ttc-edu-stage-kicker {
    color: var(--ttc-text-muted) !important;
    letter-spacing: 0.06em !important;
}

.ttc-premium-dashboard .value,
.ttc-premium-dashboard .ttc-stat-card .value,
.ttc-premium-dashboard .ttc-stat-premium .value {
    color: var(--ttc-text-main);
    font-size: clamp(26px, 2.2vw, 34px) !important;
    font-weight: 850 !important;
}

.ttc-premium-dashboard .ttc-stat-card.highlight .value,
.ttc-premium-dashboard .ttc-stat-card.highlight .label,
.ttc-premium-dashboard .ttc-stat-card.highlight .sub,
.ttc-premium-dashboard .ttc-stat-premium.highlight .value,
.ttc-premium-dashboard .ttc-stat-premium.highlight .label,
.ttc-premium-dashboard .ttc-stat-premium.highlight .footer {
    color: #fff !important;
}

.ttc-premium-dashboard .icon,
.ttc-premium-dashboard .kpi-icon,
.ttc-premium-dashboard .ttc-edu-stage-icon {
    width: 40px !important;
    height: 40px !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    border-radius: 12px !important;
    background: rgba(var(--ttc-role-accent-rgb), 0.12) !important;
}

.ttc-premium-dashboard input,
.ttc-premium-dashboard select,
.ttc-premium-dashboard textarea {
    border-color: var(--ttc-premium-border) !important;
}

.ttc-premium-dashboard .ttc-grid-2,
.ttc-premium-dashboard .ttc-grid-3,
.ttc-premium-dashboard .ttc-grid-4 {
    gap: clamp(14px, 1.6vw, 22px) !important;
}

.ttc-premium-dashboard .ttc-modal-box,
.ttc-premium-dashboard .ttc-modal-content {
    border: 1px solid var(--ttc-premium-border) !important;
    border-radius: 18px !important;
    background: var(--ttc-card-bg-solid, #1e293b) !important;
    box-shadow: 0 24px 80px -36px rgba(2, 6, 23, 0.88) !important;
}

.ttc-studyos-command,
.ttc-studyos-hero,
.ttc-studyos-layout {
    margin-bottom: clamp(18px, 2vw, 28px);
}

.ttc-studyos-command,
.ttc-studyos-hero,
.ttc-right-panel,
.ttc-intel-card {
    border: 1px solid var(--ttc-premium-border, rgba(99, 102, 241, 0.22));
    border-radius: 16px;
    background:
        linear-gradient(135deg, rgba(var(--ttc-role-accent-rgb, 99, 102, 241), 0.1), rgba(255, 255, 255, 0.025)),
        var(--ttc-premium-surface-soft, rgba(255, 255, 255, 0.035));
    box-shadow: var(--ttc-premium-shadow, 0 18px 50px -34px rgba(2, 6, 23, 0.78));
}

.ttc-studyos-command {
    padding: clamp(18px, 2vw, 26px);
}

.ttc-studyos-command-head,
.ttc-studyos-hero,
.ttc-section-header,
.ttc-studyos-actions,
.ttc-action-card > div,
.ttc-topic-list article,
.ttc-intel-card dl div {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.ttc-studyos-command-head {
    margin-bottom: 18px;
}

.ttc-studyos-command-head span,
.ttc-studyos-hero-copy .ttc-badge,
.ttc-section-header span,
.ttc-kpi-card span,
.ttc-action-card span,
.ttc-intel-card > span {
    display: inline-flex;
    color: var(--ttc-text-muted);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.ttc-studyos-command-head h2,
.ttc-studyos-hero h2,
.ttc-section-header h3,
.ttc-intel-card h3,
.ttc-action-card h4 {
    margin: 4px 0 0;
    color: var(--ttc-text-main);
    letter-spacing: 0;
}

.ttc-studyos-hero {
    padding: clamp(22px, 3vw, 34px);
}

.ttc-studyos-hero-copy {
    min-width: 0;
}

.ttc-studyos-hero-copy h2 {
    font-size: clamp(28px, 4vw, 48px);
    line-height: 1.02;
}

.ttc-studyos-hero-copy p,
.ttc-action-card p,
.ttc-intel-card p,
.ttc-empty-state p {
    color: var(--ttc-text-muted);
    line-height: 1.6;
}

.ttc-studyos-hero-meter {
    min-width: 220px;
    padding: 18px;
    border-radius: 14px;
    border: 1px solid rgba(var(--ttc-role-accent-rgb, 99, 102, 241), 0.24);
    background: rgba(0, 0, 0, 0.16);
    text-align: center;
}

.ttc-studyos-hero-meter span,
.ttc-studyos-hero-meter small {
    display: block;
    color: var(--ttc-text-muted);
    font-size: 12px;
}

.ttc-studyos-hero-meter strong {
    display: block;
    margin: 8px 0;
    color: var(--ttc-text-main);
    font-size: clamp(38px, 5vw, 64px);
    line-height: 1;
}

.ttc-kpi-grid,
.ttc-card-grid {
    display: grid;
    gap: clamp(12px, 1.4vw, 18px);
}

.ttc-kpi-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.ttc-card-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 16px;
}

.ttc-kpi-card,
.ttc-action-card,
.ttc-empty-state,
.ttc-topic-list article,
.ttc-mini-result {
    border: 1px solid var(--ttc-premium-border, rgba(99, 102, 241, 0.22));
    border-radius: 14px;
    background: var(--ttc-premium-surface-soft, rgba(255, 255, 255, 0.035));
}

.ttc-kpi-card {
    padding: 18px;
}

.ttc-kpi-card strong {
    display: block;
    margin-top: 8px;
    color: var(--ttc-text-main);
    font-size: clamp(26px, 2.5vw, 38px);
    line-height: 1;
}

.ttc-kpi-card small {
    display: block;
    margin-top: 8px;
    color: var(--ttc-text-muted);
}

.ttc-action-card {
    display: flex;
    min-height: 190px;
    flex-direction: column;
    padding: 18px;
}

.ttc-action-card p {
    flex: 1;
    margin: 10px 0 16px;
}

.ttc-action-card a,
.ttc-section-header a,
.ttc-topic-list a,
.ttc-revision-queue a {
    color: var(--ttc-role-accent, #6366f1);
    font-weight: 800;
    text-decoration: none;
}

.ttc-action-card.urgency-high {
    border-color: rgba(239, 68, 68, 0.42);
}

.ttc-action-card.urgency-medium {
    border-color: rgba(245, 158, 11, 0.42);
}

.ttc-studyos-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
    gap: clamp(18px, 2vw, 28px);
    align-items: start;
}

.ttc-section-header {
    margin: 24px 0 14px;
}

.ttc-topic-list {
    display: grid;
    gap: 10px;
}

.ttc-topic-list article,
.ttc-revision-queue article {
    padding: 14px;
}

.ttc-revision-queue {
    display: grid;
    gap: 10px;
}

.ttc-revision-queue article {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 14px;
    border: 1px solid var(--ttc-premium-border);
    border-radius: 12px;
    background: var(--ttc-premium-surface-soft);
}

.ttc-topic-list strong,
.ttc-mini-result strong,
.ttc-revision-queue strong {
    display: block;
    color: var(--ttc-text-main);
}

.ttc-topic-list span,
.ttc-mini-result span,
.ttc-revision-queue small {
    display: block;
    margin-top: 3px;
    color: var(--ttc-text-muted);
    font-size: 12px;
}

.ttc-revision-status {
    display: inline-flex !important;
    width: max-content;
    margin: 0 0 7px !important;
    padding: 3px 8px;
    border-radius: 999px;
    background: rgba(14, 165, 233, 0.12);
    color: #0284c7 !important;
    font-size: 10px !important;
    font-weight: 900;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.ttc-revision-status.needs_revision {
    background: rgba(245, 158, 11, 0.14);
    color: #b45309 !important;
}

.ttc-revision-status.mastered,
.ttc-revision-status.due {
    background: rgba(16, 185, 129, 0.14);
    color: #047857 !important;
}

.ttc-authority-watchlist {
    display: grid;
    gap: 10px;
    margin-top: 16px;
}

.ttc-authority-watchlist a {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 14px;
    padding: 13px 14px;
    border: 1px solid var(--ttc-premium-border, rgba(99, 102, 241, 0.22));
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.045);
    color: var(--ttc-text-main);
    text-decoration: none;
}

.ttc-authority-watchlist strong,
.ttc-authority-watchlist span,
.ttc-authority-watchlist small {
    display: block;
}

.ttc-authority-watchlist strong {
    color: var(--ttc-text-main);
    font-weight: 900;
}

.ttc-authority-watchlist span,
.ttc-authority-watchlist small,
.ttc-authority-revision-panel p {
    color: var(--ttc-text-muted);
    font-size: 12px;
}

.ttc-authority-watchlist small {
    margin-top: 3px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ttc-authority-watchlist b {
    color: var(--ttc-role-accent, #6366f1);
    font-size: 12px;
}

.ttc-authority-watchlist.family b {
    color: #f59e0b;
}

.ttc-authority-revision-panel h3 {
    margin-bottom: 6px;
}

.ttc-authority-revision-panel p {
    margin: 0 0 10px;
    line-height: 1.5;
}

.ttc-topic-score {
    color: var(--ttc-text-main);
    font-size: 22px;
    font-weight: 900;
}

.ttc-right-panel,
.ttc-intel-card,
.ttc-empty-state {
    padding: 18px;
}

.ttc-intel-card + .ttc-intel-card {
    margin-top: 16px;
}

.ttc-intel-card dl {
    display: grid;
    gap: 8px;
    margin: 16px 0;
}

.ttc-intel-card dt,
.ttc-intel-card dd {
    margin: 0;
    color: var(--ttc-text-muted);
    font-size: 12px;
}

.ttc-intel-card dd {
    color: var(--ttc-text-main);
    font-weight: 800;
}

.ttc-button {
    display: inline-flex;
    min-height: 40px;
    align-items: center;
    justify-content: center;
    padding: 0 14px;
    border: 1px solid transparent;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 850;
    line-height: 1;
    text-decoration: none;
}

.ttc-button-primary {
    background: var(--ttc-role-accent, #6366f1);
    color: #fff !important;
}

.ttc-button-secondary {
    border-color: rgba(var(--ttc-role-accent-rgb, 99, 102, 241), 0.32);
    background: rgba(var(--ttc-role-accent-rgb, 99, 102, 241), 0.1);
    color: var(--ttc-role-accent, #6366f1) !important;
}

.ttc-admin-dashboard .ttc-studyos-command {
    --ttc-role-accent: #6366f1;
    --ttc-role-accent-rgb: 99, 102, 241;
    --ttc-text-main: #f8fafc;
    --ttc-text-muted: #94a3b8;
    --ttc-premium-border: rgba(99, 102, 241, 0.22);
    --ttc-premium-surface-soft: #111827;
    margin: 0 0 30px;
}

.ttc-ai-tutor-panel {
    margin: 0 0 clamp(18px, 2vw, 26px);
    padding: clamp(16px, 2vw, 22px);
    border: 1px solid var(--ttc-premium-border, rgba(99, 102, 241, 0.22));
    border-radius: 16px;
    background:
        linear-gradient(135deg, rgba(var(--ttc-role-accent-rgb, 99, 102, 241), 0.11), rgba(6, 182, 212, 0.05)),
        var(--ttc-premium-surface-soft, rgba(255, 255, 255, 0.035));
    box-shadow: var(--ttc-premium-shadow, 0 18px 50px -34px rgba(2, 6, 23, 0.78));
}

.ttc-ai-tutor-head,
.ttc-ai-custom-form > div {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.ttc-ai-tutor-head {
    margin-bottom: 14px;
}

.ttc-ai-tutor-head span,
.ttc-ai-custom-form label {
    display: block;
    color: var(--ttc-text-muted);
    font-size: 11px;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.ttc-ai-tutor-head h3 {
    margin: 4px 0 0;
    color: var(--ttc-text-main);
    font-size: clamp(18px, 2vw, 24px);
    letter-spacing: 0;
}

.ttc-ai-action-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
}

.ttc-ai-action-button {
    min-height: 42px;
    padding: 10px 12px;
    border: 1px solid rgba(var(--ttc-role-accent-rgb, 99, 102, 241), 0.26);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.045);
    color: var(--ttc-text-main);
    cursor: pointer;
    font-size: 12px;
    font-weight: 800;
    text-align: left;
}

.ttc-ai-action-button:hover {
    border-color: rgba(var(--ttc-role-accent-rgb, 99, 102, 241), 0.48);
    background: rgba(var(--ttc-role-accent-rgb, 99, 102, 241), 0.12);
}

.ttc-ai-custom-form {
    margin-top: 14px;
}

.ttc-ai-custom-form label {
    margin-bottom: 8px;
}

.ttc-ai-custom-input {
    flex: 1;
    min-height: 40px;
    border-radius: 10px;
}

.ttc-ai-response {
    min-height: 74px;
    margin-top: 14px;
    padding: 14px;
    border: 1px solid rgba(var(--ttc-role-accent-rgb, 99, 102, 241), 0.18);
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.14);
    color: var(--ttc-text-main);
}

.ttc-ai-response-empty,
.ttc-ai-response p {
    margin: 0;
    color: var(--ttc-text-muted);
    line-height: 1.55;
}

.ttc-ai-response-content {
    color: var(--ttc-text-main);
    line-height: 1.65;
}

.ttc-ai-thinking {
    display: inline-flex;
    gap: 5px;
    margin-right: 8px;
    vertical-align: middle;
}

.ttc-ai-thinking span {
    width: 7px;
    height: 7px;
    border-radius: 999px;
    background: var(--ttc-role-accent, #6366f1);
    animation: ttcAiPulse 0.9s infinite ease-in-out;
}

.ttc-ai-thinking span:nth-child(2) {
    animation-delay: 0.12s;
}

.ttc-ai-thinking span:nth-child(3) {
    animation-delay: 0.24s;
}

.ttc-ai-jump-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    padding: 0 12px;
    border-radius: 10px;
    background: linear-gradient(135deg, #6366f1, #06b6d4);
    color: #fff !important;
    font-size: 12px;
    font-weight: 850;
    text-decoration: none;
}

.ttc-studyos-empty {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 18px;
    align-items: center;
    margin: 0 0 clamp(18px, 2vw, 28px);
    padding: clamp(18px, 2vw, 26px);
    border: 1px solid rgba(var(--ttc-role-accent-rgb, 99, 102, 241), 0.24);
    border-radius: 16px;
    background:
        linear-gradient(135deg, rgba(var(--ttc-role-accent-rgb, 99, 102, 241), 0.1), rgba(255, 255, 255, 0.025)),
        var(--ttc-premium-surface-soft, rgba(255, 255, 255, 0.035));
    box-shadow: var(--ttc-premium-shadow, 0 18px 50px -34px rgba(2, 6, 23, 0.78));
}

.ttc-studyos-empty-mark {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    background:
        linear-gradient(135deg, var(--ttc-role-accent, #6366f1), rgba(var(--ttc-role-accent-rgb, 99, 102, 241), 0.55));
    box-shadow: 0 18px 38px -28px rgba(var(--ttc-role-accent-rgb, 99, 102, 241), 0.95);
}

.ttc-studyos-empty span {
    display: block;
    color: var(--ttc-text-muted);
    font-size: 11px;
    font-weight: 850;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.ttc-studyos-empty h3 {
    margin: 4px 0 6px;
    color: var(--ttc-text-main);
    font-size: clamp(18px, 2vw, 24px);
}

.ttc-studyos-empty p {
    max-width: 760px;
    margin: 0;
    color: var(--ttc-text-muted);
    line-height: 1.6;
}

.ttc-studyos-empty-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 14px;
}

@keyframes ttcAiPulse {
    0%, 80%, 100% { opacity: 0.35; transform: translateY(0); }
    40% { opacity: 1; transform: translateY(-3px); }
}

@media (max-width: 900px) {
    .ttc-premium-dashboard {
        padding: 18px !important;
    }

    .ttc-premium-dashboard .ttc-db-header,
    .ttc-premium-dashboard .ttc-dash-header {
        align-items: flex-start !important;
        flex-direction: column !important;
    }

    .ttc-studyos-hero,
    .ttc-studyos-layout,
    .ttc-studyos-command-head {
        display: grid;
        grid-template-columns: 1fr;
    }

    .ttc-kpi-grid,
    .ttc-card-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .ttc-premium-dashboard {
        padding: 14px !important;
    }

    .ttc-premium-dashboard .ttc-db-nav,
    .ttc-premium-dashboard .ttc-dash-nav {
        border-radius: 12px !important;
    }

    .ttc-premium-dashboard .ttc-db-tab,
    .ttc-premium-dashboard .ttc-nav-item,
    .ttc-premium-dashboard .ttc-dash-nav a,
    .ttc-premium-dashboard .ttc-db-nav a {
        min-height: 34px !important;
        padding: 0 10px !important;
        line-height: 34px !important;
        font-size: 11px !important;
    }

    .ttc-kpi-grid,
    .ttc-card-grid {
        grid-template-columns: 1fr;
    }

    .ttc-studyos-actions {
        align-items: stretch;
        flex-direction: column;
    }

    .ttc-topic-list article {
        align-items: flex-start;
        flex-direction: column;
    }

    .ttc-ai-action-grid {
        grid-template-columns: 1fr;
    }

    .ttc-ai-tutor-head,
    .ttc-ai-custom-form > div {
        align-items: stretch;
        flex-direction: column;
    }

    .ttc-studyos-empty {
        grid-template-columns: 1fr;
    }
}