.webinar-container {
    max-width: 1400px;
    margin: 20px auto;
    background: #1e293b;
    border-radius: 16px;
    overflow: hidden;
}
.webinar-grid {
    display: flex;
    flex-wrap: wrap;
}
.video-section {
    flex: 2;
    padding: 20px;
    background: #0f172a;
}
.chat-section {
    flex: 1;
    min-width: 300px;
    background: #111827;
    display: flex;
    flex-direction: column;
    height: 600px;
}
.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.tab-btn {
    background: #334155;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    font-size: 14px;
}
.tab-btn.active {
    background: #3b82f6;
}
.video-pane {
    display: none;
}
.video-pane.active-pane {
    display: block;
}
.video-pane iframe {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: 12px;
}
/* Подсказка под видео */
.video-note {
    margin-top: 15px;
    padding: 10px;
    background: #1e293b;
    border-radius: 8px;
    text-align: center;
    color: #94a3b8;
    font-size: 14px;
}
.chat-header {
    padding: 15px;
    background: #1e293b;
    border-bottom: 1px solid #334155;
    color: white;
}
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
    background: #0f172a;
}
/* Исправление цвета сообщений - ТЕПЕРЬ БЕЛЫЙ ТЕКСТ */
.message {
    background: #1e293b;
    padding: 10px 14px;
    border-radius: 12px;
    margin-bottom: 10px;
    color: #e2e8f0;
}
.message strong {
    color: #60a5fa;
}
.message-text {
    color: #e2e8f0;
}
.message small {
    color: #94a3b8;
    font-size: 10px;
    display: block;
    margin-top: 5px;
}
.message.system {
    background: #2d3748;
    text-align: center;
    font-style: italic;
    color: #94a3b8;
}
.auth-form {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #0f172a;
}
.auth-content {
    text-align: center;
    padding: 20px;
    color: white;
}
.auth-content h4 {
    color: white;
    margin-bottom: 15px;
}
#authUsername {
    padding: 10px;
    margin: 10px;
    border-radius: 8px;
    border: 1px solid #475569;
    background: #1e293b;
    color: white;
    width: 200px;
}
#authBtn {
    background: #3b82f6;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    color: white;
    cursor: pointer;
}
.chat-input-area {
    padding: 15px;
    border-top: 1px solid #334155;
    background: #0f172a;
}
.char-counter {
    text-align: right;
    font-size: 12px;
    color: #94a3b8;
    margin-bottom: 5px;
}
#messageInput {
    width: 100%;
    padding: 10px;
    border-radius: 8px;
    border: 1px solid #475569;
    background: #1e293b;
    color: white;
    resize: vertical;
    margin-bottom: 10px;
    font-size: 14px;
}
.chat-buttons {
    display: flex;
    gap: 10px;
}
#sendBtn {
    background: #3b82f6;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    flex: 1;
}
.logout-btn {
    background: none;
    border: 1px solid #ef4444;
    color: #ef4444;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
}
@media (max-width: 768px) {
    .webinar-grid { flex-direction: column; }
    .chat-section { height: 500px; }
    .tab-btn { padding: 6px 12px; font-size: 12px; }
}