/* ============================================
   Poker Coach AI — Main Stylesheet
   Dark poker theme with CSS custom properties
   ============================================ */

/* --- CSS Variables / Theme --- */
:root {
    /* Background */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #1c2333;
    --bg-card: #1a1f2e;
    --bg-hover: #21273a;
    --bg-input: #0d1117;

    /* Text */
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --text-link: #58a6ff;

    /* Poker accent colors */
    --accent-primary: #2ea043;
    --accent-primary-hover: #3fb950;
    --accent-secondary: #1f6feb;
    --accent-gold: #d4a017;
    --accent-red: #e74c3c;

    /* Suit colors */
    --suit-hearts: #e74c3c;
    --suit-diamonds: #3498db;
    --suit-clubs: #2ea043;
    --suit-spades: #e6edf3;

    /* Borders */
    --border-color: #30363d;
    --border-light: #21262d;

    /* Badges */
    --badge-admin: #e74c3c;
    --badge-coach: #d4a017;
    --badge-player: #2ea043;
    --badge-success: #2ea043;
    --badge-danger: #e74c3c;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;

    /* Font */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--text-link);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-primary-hover);
}

img {
    max-width: 100%;
    height: auto;
}

/* --- Container --- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* --- Header --- */
.main-header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    height: 60px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.1rem;
    white-space: nowrap;
    flex-shrink: 0;
}

.logo:hover {
    color: var(--text-primary);
}

.logo-icon {
    font-size: 1.5rem;
    color: var(--accent-primary);
}

.logo-ai {
    color: var(--accent-gold);
}

/* --- Navigation --- */
.main-nav {
    flex: 1;
    overflow-x: auto;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--space-xs);
    align-items: center;
}

.nav-link {
    display: block;
    padding: var(--space-sm) var(--space-md);
    color: var(--text-secondary);
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav-link:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.nav-link--coach {
    color: var(--accent-gold);
}

.nav-link--admin {
    color: var(--accent-red);
}

/* --- Header User --- */
.header-user {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-shrink: 0;
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.user-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* --- Mobile Nav Toggle --- */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
    flex-direction: column;
    gap: 4px;
}

.nav-toggle__bar {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: transform var(--transition-fast);
}

/* --- Main Content --- */
.main-content {
    flex: 1;
    padding: var(--space-xl) 0;
}

/* --- Footer --- */
.main-footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--space-lg) 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* --- Page Header --- */
.page-header {
    margin-bottom: var(--space-xl);
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.page-subtitle {
    color: var(--text-secondary);
    margin-top: var(--space-xs);
}

/* --- Cards --- */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card--accent {
    border-color: var(--accent-primary);
}

.card--coach {
    border-color: var(--accent-gold);
}

.card--admin {
    border-color: var(--accent-red);
}

.card-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-light);
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    padding: var(--space-lg);
}

/* --- Dashboard Grid --- */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-lg);
}

/* --- Quick Links --- */
.quick-links {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-md);
}

.quick-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-lg);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
    color: var(--text-primary);
}

.quick-link:hover {
    background-color: var(--bg-hover);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    color: var(--text-primary);
}

.quick-link__icon {
    font-size: 1.75rem;
    margin-bottom: var(--space-sm);
}

.quick-link__text {
    font-weight: 600;
    font-size: 0.9rem;
}

.quick-link__desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: var(--space-xs);
}

/* --- Badges --- */
.badge {
    display: inline-block;
    padding: 2px 8px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: var(--radius-full);
    line-height: 1.4;
}

.badge--admin {
    background-color: rgba(231, 76, 60, 0.15);
    color: var(--badge-admin);
}

.badge--coach {
    background-color: rgba(212, 160, 23, 0.15);
    color: var(--badge-coach);
}

.badge--player {
    background-color: rgba(46, 160, 67, 0.15);
    color: var(--badge-player);
}

.badge--success {
    background-color: rgba(46, 160, 67, 0.15);
    color: var(--badge-success);
}

.badge--danger {
    background-color: rgba(231, 76, 60, 0.15);
    color: var(--badge-danger);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 10px 20px;
    font-size: 0.875rem;
    font-weight: 600;
    font-family: var(--font-family);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
    text-decoration: none;
    line-height: 1.4;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

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

.btn--primary:hover {
    background-color: var(--accent-primary-hover);
    color: #fff;
}

.btn--outline {
    background-color: transparent;
    color: var(--text-secondary);
    border-color: var(--border-color);
}

.btn--outline:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--text-secondary);
}

.btn--sm {
    padding: 5px 12px;
    font-size: 0.8rem;
}

.btn--full {
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* --- Forms --- */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-group--row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.form-input,
.form-select {
    width: 100%;
    padding: 10px 14px;
    font-size: 0.9rem;
    font-family: var(--font-family);
    color: var(--text-primary);
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}

.form-input:focus,
.form-select:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(46, 160, 67, 0.15);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-input:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.form-select--sm {
    padding: 4px 8px;
    font-size: 0.8rem;
    width: auto;
}

.form-hint {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

.form-error {
    display: block;
    font-size: 0.8rem;
    color: var(--accent-red);
    margin-top: var(--space-xs);
    min-height: 1.2em;
}

.form-input--error {
    border-color: var(--accent-red);
}

.form-checkbox {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
    font-size: 0.85rem;
}

.form-checkbox input[type="checkbox"] {
    accent-color: var(--accent-primary);
    width: 16px;
    height: 16px;
}

.form-checkbox__label {
    color: var(--text-secondary);
}

.form-link {
    font-size: 0.85rem;
    color: var(--text-link);
}

.form-link:hover {
    color: var(--accent-primary-hover);
}

.form-static {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-actions {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

/* --- Alerts --- */
.alert {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    font-size: 0.875rem;
    border: 1px solid transparent;
}

.alert--error {
    background-color: rgba(231, 76, 60, 0.1);
    border-color: rgba(231, 76, 60, 0.3);
    color: #f87171;
}

.alert--success {
    background-color: rgba(46, 160, 67, 0.1);
    border-color: rgba(46, 160, 67, 0.3);
    color: #4ade80;
}

.alert-list {
    list-style: none;
    padding: 0;
}

.alert-list li {
    padding: 2px 0;
}

.alert-list li::before {
    content: '• ';
}

/* --- Tables --- */
.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.table th,
.table td {
    padding: var(--space-md);
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

.table th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table tbody tr:hover {
    background-color: var(--bg-hover);
}

/* --- Utility --- */
.text-muted {
    color: var(--text-muted);
}

/* --- Notification Toast --- */
.notification {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transform: translateY(100px);
    opacity: 0;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.notification--visible {
    transform: translateY(0);
    opacity: 1;
}

.notification--success {
    background-color: var(--accent-primary);
    color: #fff;
}

.notification--error {
    background-color: var(--accent-red);
    color: #fff;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .header-container {
        flex-wrap: wrap;
        height: auto;
        padding-top: var(--space-md);
        padding-bottom: var(--space-md);
    }

    .nav-toggle {
        display: flex;
        margin-left: auto;
    }

    .main-nav {
        display: none;
        width: 100%;
        order: 3;
    }

    .main-nav.is-open {
        display: block;
    }

    .nav-list {
        flex-direction: column;
        align-items: stretch;
        padding: var(--space-md) 0;
    }

    .nav-link {
        padding: var(--space-md);
    }

    .header-user {
        order: 2;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .quick-links {
        grid-template-columns: 1fr 1fr;
    }
}

/* ============================================
   Sidebar Layout
   ============================================ */

/* --- Layout Structure --- */
.layout-sidebar {
    display: flex;
    min-height: 100vh;
    margin: 0;
    padding: 0;
}

/* --- Sidebar --- */
.sidebar {
    width: 260px;
    height: 100vh;
    background-color: #0a0e14;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    transition: transform 0.3s ease;
    overflow: hidden;
}

.sidebar__header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.sidebar__logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 700;
}

.sidebar__logo-icon {
    font-size: 1.5rem;
    color: var(--accent-primary);
}

.sidebar__logo-ai {
    color: var(--accent-gold);
}

/* --- Sidebar Navigation --- */
.sidebar__nav {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem 0;
    min-height: 0;
}

/* Scrollbar styling for sidebar */
.sidebar__nav::-webkit-scrollbar {
    width: 5px;
}

.sidebar__nav::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar__nav::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 3px;
}

.sidebar__nav::-webkit-scrollbar-thumb:hover {
    background-color: var(--text-muted);
}

.sidebar__menu {
    list-style: none;
    margin: 0;
    padding: 0;
}

.sidebar__section-label {
    padding: 1rem 1.5rem 0.4rem;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
}

.sidebar__link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: all 0.15s ease;
}

.sidebar__link:hover {
    color: var(--text-primary);
    background-color: var(--bg-hover);
    border-left-color: var(--border-color);
}

.sidebar__link--active {
    color: var(--accent-primary);
    background-color: rgba(46, 160, 67, 0.08);
    border-left-color: var(--accent-primary);
    font-weight: 600;
}

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

.sidebar__link--logout:hover {
    color: var(--accent-red);
    border-left-color: var(--accent-red);
}

.sidebar__icon {
    font-size: 1.1rem;
    width: 1.5rem;
    text-align: center;
    flex-shrink: 0;
}

/* --- Sidebar Footer --- */
.sidebar__footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
}

.sidebar__user {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.sidebar__user-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

.sidebar__user-role {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--accent-gold);
}

/* --- Main Wrapper --- */
.main-wrapper {
    flex: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* --- Topbar --- */
.topbar {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 2rem;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar__toggle {
    display: none;
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 1.25rem;
    padding: 0.3rem 0.6rem;
    border-radius: 6px;
    cursor: pointer;
}

.topbar__title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    flex: 1;
}

.topbar__user {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.topbar__username {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* --- Main Content with sidebar --- */
.layout-sidebar .main-content {
    flex: 1;
    padding: 2rem;
    max-width: 100%;
}

.layout-sidebar .main-footer {
    padding: 1rem 2rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* --- Full width for auth pages --- */
.main-content--full {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* --- Dashboard Grid --- */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

/* --- Responsive Sidebar --- */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar--open {
        transform: translateX(0);
        box-shadow: var(--shadow-lg);
    }

    .main-wrapper {
        margin-left: 0;
    }

    .topbar__toggle {
        display: block;
    }

    .layout-sidebar .main-content {
        padding: 1.5rem;
    }
}

@media (max-width: 768px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .layout-sidebar .main-content {
        padding: 1rem;
    }

    .topbar {
        padding: 0.75rem 1rem;
    }

    .topbar__user {
        display: none;
    }
}

/* ============================================
   Help Modal
   ============================================ */
.help-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.4rem 0.85rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-secondary);
    background: rgba(31, 111, 235, 0.1);
    border: 1px solid rgba(31, 111, 235, 0.3);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.15s ease;
}
.help-btn:hover {
    background: rgba(31, 111, 235, 0.2);
    border-color: var(--accent-secondary);
}

.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 200;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}
.modal-overlay--visible {
    display: flex;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    max-width: 680px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.modal__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal__title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.modal__close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}
.modal__close:hover {
    color: var(--text-primary);
}

.modal__body {
    padding: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

.modal__body h3 {
    color: var(--text-primary);
    font-size: 1rem;
    margin: 1.25rem 0 0.5rem;
}
.modal__body h3:first-child {
    margin-top: 0;
}

.modal__body p {
    margin: 0 0 0.75rem;
}

.term-list {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin: 0.75rem 0;
}

.term-item {
    display: flex;
    gap: 0.75rem;
    padding: 0.6rem 0.75rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border-left: 3px solid var(--accent-secondary);
}

.term-item__name {
    font-weight: 700;
    color: var(--accent-gold);
    min-width: 100px;
    flex-shrink: 0;
}

.term-item__desc {
    color: var(--text-secondary);
}

/* ============================================
   AI Loader — Animated loading for AI responses
   ============================================ */
.ai-loader {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(46, 160, 67, 0.05), rgba(31, 111, 235, 0.05));
    border: 1px solid rgba(46, 160, 67, 0.2);
    border-radius: var(--radius-md);
    animation: ai-loader-pulse 2s ease-in-out infinite;
}

@keyframes ai-loader-pulse {
    0%, 100% { border-color: rgba(46, 160, 67, 0.2); }
    50% { border-color: rgba(46, 160, 67, 0.5); }
}

.ai-loader__spinner {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    animation: ai-spin 0.8s linear infinite;
    flex-shrink: 0;
}

@keyframes ai-spin {
    to { transform: rotate(360deg); }
}

.ai-loader__text {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.ai-loader__title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.ai-loader__subtitle {
    font-size: 0.8rem;
    color: var(--text-muted);
    animation: ai-dots 1.5s steps(4, end) infinite;
}

@keyframes ai-dots {
    0% { content: ''; }
    25% { opacity: 0.6; }
    50% { opacity: 1; }
    75% { opacity: 0.6; }
    100% { opacity: 1; }
}