/* General Styles */
:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --sidebar-bg: #f8f9fa;
    --chat-bg: #ffffff;
    --message-sent-bg: #4f46e5;
    --message-received-bg: #e5e7eb;
    --message-sent-color: #ffffff;
    --message-received-color: #1f2937;
    --border-color: #e5e7eb;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --danger: #ef4444;
    --success: #10b981;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-color);
    height: 100vh;
    margin: 0;
    overflow: hidden;
}

.container-fluid {
    padding: 0;
    height: 100vh;
}

#app, #chat-container {
    height: 100vh;
}

/* Sidebar Styles */
.sidebar {
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: 0;
}

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

.brand-container h3 {
    margin: 0;
    font-weight: 600;
    color: var(--primary-color);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-profile #username {
    font-weight: 500;
}

.chat-tabs {
    flex-grow: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.nav-tabs {
    border-bottom: 1px solid var(--border-color);
}

.nav-tabs .nav-link {
    color: var(--text-light);
    border: none;
    padding: 0.75rem 1rem;
}

.nav-tabs .nav-link.active {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    background-color: transparent;
}

.tab-content {
    overflow-y: auto;
    flex-grow: 1;
}

.search-box {
    padding: 0.5rem 1rem;
}

#user-list {
    overflow-y: auto;
}

.user-item {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-item:hover {
    background-color: rgba(79, 70, 229, 0.05);
}

.user-item.active {
    background-color: rgba(79, 70, 229, 0.1);
    border-left: 3px solid var(--primary-color);
}

.user-status {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--text-light);
}

.user-status.online {
    background-color: var(--success);
}

.ai-chat-info {
    padding: 2rem;
    text-align: center;
}

/* Chat Area Styles */
.chat-area {
    height: 100%;
    display: flex;
    flex-direction: column;
    background-color: var(--chat-bg);
    position: relative;
}

.chat-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #fff;
}

.chat-user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.chat-back {
    cursor: pointer;
    margin-right: 10px;
}

.chat-user-name {
    font-weight: 500;
}

.chat-actions button {
    border: none;
    padding: 0.25rem 0.5rem;
}

.chat-messages {
    flex-grow: 1;
    overflow-y: auto;
    padding: 1rem;
}

.message {
    margin-bottom: 1rem;
    max-width: 80%;
    display: flex;
    flex-direction: column;
}

.message.sent {
    align-self: flex-end;
    align-items: flex-end;
    margin-left: auto;
}

.message.received {
    align-self: flex-start;
    align-items: flex-start;
    margin-right: auto;
}

.message-content {
    padding: 0.75rem 1rem;
    border-radius: 1rem;
    word-break: break-word;
}

.sent .message-content {
    background-color: var(--message-sent-bg);
    color: var(--message-sent-color);
    border-bottom-right-radius: 0;
}

.received .message-content {
    background-color: var(--message-received-bg);
    color: var(--message-received-color);
    border-bottom-left-radius: 0;
}

.message-time {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-top: 0.25rem;
}

.ai-message .message-content {
    background-color: #f0f4f8;
    color: #1a202c;
    border-bottom-left-radius: 0;
}

.chat-input-container {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    background-color: #fff;
}

.chat-input-container .input-group {
    border-radius: 1.5rem;
    overflow: hidden;
}

.chat-input-container .form-control {
    border-radius: 0;
    border-right: 0;
}

.chat-input-container .btn {
    border-radius: 0;
}

/* Welcome Screen */
#welcome-screen {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    background-color: #f9fafb;
}

.welcome-content {
    text-align: center;
    padding: 2rem;
}

.welcome-icons {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.welcome-icons i {
    color: var(--primary-color);
}

/* Video Container */
#video-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #000;
    z-index: 10;
    display: flex;
    flex-direction: column;
}

.video-header {
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 11;
}

.video-controls {
    display: flex;
    gap: 0.5rem;
}

.video-streams {
    flex-grow: 1;
    position: relative;
    overflow: hidden;
}

.remote-video-container {
    width: 100%;
    height: 100%;
}

#remote-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.local-video-container {
    position: absolute;
    width: 150px;
    height: 200px;
    bottom: 20px;
    right: 20px;
    border: 2px solid #fff;
    border-radius: 8px;
    overflow: hidden;
}

#local-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Login and Register Forms */
.card {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: none;
    border-radius: 0.5rem;
}

.card-body {
    padding: 2rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 767.98px) {
    .sidebar {
        position: absolute;
        width: 100%;
        z-index: 5;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .local-video-container {
        width: 100px;
        height: 133px;
    }
}