:root {
    --primary: #5468FF;
    --primary-light: #8590FF;
    --primary-dark: #3A4DB2;
    --student: #E9EFFF;
    --teacher: #EBFAEF;
    --teacher-accent: #4CAF50;
    --text-dark: #1A2138;
    --text-light: #5F6A8A;
    --background: #F9FAFC;
    --panel: #FFFFFF;
    --border: #E1E5EE;
    --shadow: 0 4px 12px rgba(84, 104, 255, 0.10);
    --hover-shadow: 0 6px 16px rgba(84, 104, 255, 0.18);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/*
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

body {
    background-color: var(--background);
    color: var(--text-dark);
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
*/

.chat-container {
    width: 700px;
    height: 900px;
    display: flex;
    flex-direction: column;
    border-radius: 16px;
    background-color: var(--panel);
    box-shadow: var(--shadow);
    overflow: hidden;
    position: relative;
}

.header {
    padding: 16px 24px;
    background-color: var(--panel);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    position: relative;
    z-index: 10;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.course-info {
    display: flex;
    flex-direction: column;
}

.course-title {
    font-weight: 600;
    font-size: 16px;
    color: var(--text-dark);
}

.course-participants {
    font-size: 12px;
    color: var(--text-light);
}

.header-actions {
    display: flex;
    gap: 12px;
}

.icon-button {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--background);
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
}

.icon-button:hover {
    background-color: var(--primary-light);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--hover-shadow);
}

.icon-button svg {
    width: 18px;
    height: 18px;
}

.tabs {
    display: flex;
    padding: 0 20px;
    background-color: var(--panel);
    border-bottom: 1px solid var(--border);
    position: relative;
    z-index: 5;
}

.tab {
    padding: 12px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-light);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
    position: relative;
}

.tab.active {
    color: var(--primary);
    border-bottom: 2px solid var(--primary);
}

.tab:hover:not(.active) {
    color: var(--text-dark);
}

.badge {
    position: absolute;
    top: 8px;
    right: 8px;
    background-color: var(--primary);
    color: white;
    font-size: 10px;
    font-weight: 500;
    padding: 1px 6px;
    border-radius: 10px;
}

.chat-content {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    scroll-behavior: smooth;
}

.chat-content::-webkit-scrollbar {
    width: 6px;
}

.chat-content::-webkit-scrollbar-track {
    background: transparent;
}

.chat-content::-webkit-scrollbar-thumb {
    background-color: var(--border);
    border-radius: 6px;
}

.message {
    display: flex;
    flex-direction: column;
    max-width: 80%;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.student {
    align-self: flex-end;
}

.message.teacher {
    align-self: flex-start;
}

.message-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
}

.avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 12px;
    color: white;
    flex-shrink: 0;
}

.student .avatar {
    background-color: var(--primary);
}

.teacher .avatar {
    background-color: var(--teacher-accent);
}

.sender-name {
    font-size: 13px;
    font-weight: 600;
}

.student .sender-name {
    color: var(--primary-dark);
}

.teacher .sender-name {
    color: var(--teacher-accent);
}

.timestamp {
    font-size: 11px;
    color: var(--text-light);
    margin-left: auto;
}

.message-bubble {
    padding: 12px 16px;
    border-radius: 16px;
    font-size: 14px;
    line-height: 1.5;
    position: relative;
    transition: var(--transition);
}

.student .message-bubble {
    background-color: var(--student);
    border-top-right-radius: 4px;
}

.teacher .message-bubble {
    background-color: var(--teacher);
    border-top-left-radius: 4px;
}

.message-bubble:hover {
    transform: translateY(-2px);
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
}

.message-actions {
    display: flex;
    gap: 8px;
    margin-top: 6px;
    justify-content: flex-end;
    opacity: 0;
    transition: var(--transition);
}

.message:hover .message-actions {
    opacity: 1;
}

.action-button {
    background: none;
    border: none;
    font-size: 12px;
    color: var(--text-light);
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 4px;
    transition: var(--transition);
}

.action-button:hover {
    background-color: rgba(84, 104, 255, 0.1);
    color: var(--primary);
}

.embed-content {
    margin-top: 10px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border);
    background-color: white;
    transition: var(--transition);
}

.embed-content:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.embed-header {
    padding: 10px 12px;
    background-color: rgba(84, 104, 255, 0.05);
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--border);
}

.embed-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.embed-title {
    font-size: 12px;
    font-weight: 500;
    flex: 1;
}

.embed-body {
    padding: 12px;
}

.embed-image {
    width: 100%;
    border-radius: 6px;
    height: auto;
    object-fit: cover;
}

.embed-text {
    font-size: 13px;
    color: var(--text-light);
    margin-top: 8px;
    line-height: 1.4;
}

.embed-footer {
    padding: 8px 12px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.embed-button {
    background-color: var(--primary-light);
    color: white;
    font-size: 12px;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.embed-button:hover {
    background-color: var(--primary);
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(84, 104, 255, 0.2);
}

.date-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 16px 0;
    opacity: 0.7;
}

.divider-line {
    flex: 1;
    height: 1px;
    background-color: var(--border);
}

.divider-text {
    font-size: 12px;
    color: var(--text-light);
    white-space: nowrap;
}

.typing-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    color: var(--text-light);
    padding: 8px 12px;
    margin-bottom: 8px;
}

.typing-dot {
    width: 5px;
    height: 5px;
    background-color: var(--text-light);
    border-radius: 50%;
    animation: typingAnimation 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) {
    animation-delay: 0s;
}

.typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typingAnimation {

    0%,
    100% {
        transform: translateY(0);
        opacity: 0.5;
    }

    50% {
        transform: translateY(-4px);
        opacity: 1;
    }
}

.input-area {
    padding: 16px 24px 24px;
    background-color: var(--panel);
    border-top: 1px solid var(--border);
    z-index: 10;
}

.toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.tool-button {
    background: none;
    border: none;
    cursor: pointer;
    width: 32px;
    height: 32px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    transition: var(--transition);
}

.tool-button:hover {
    background-color: rgba(84, 104, 255, 0.1);
    color: var(--primary);
}

.tool-button svg {
    width: 18px;
    height: 18px;
}

.input-container {
    display: flex;
    gap: 12px;
    align-items: center;
}

.message-input {
    flex: 1;
    padding: 14px 16px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background-color: var(--background);
    font-size: 14px;
    resize: none;
    transition: var(--transition);
    height: 50px;
    outline: none;
}

.message-input:focus {
    border-color: var(--primary-light);
    box-shadow: 0 0 0 2px rgba(84, 104, 255, 0.1);
}

.send-button {
    background-color: var(--primary);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.send-button:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(84, 104, 255, 0.2);
}

.poll-container {
    padding: 12px;
    background-color: rgba(84, 104, 255, 0.05);
    border-radius: 8px;
    margin-top: 8px;
}

.poll-question {
    font-weight: 500;
    margin-bottom: 10px;
    font-size: 13px;
}

.poll-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.poll-option {
    background-color: white;
    border: 1px solid var(--border);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 13px;
    position: relative;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    justify-content: space-between;
}

.poll-option:hover {
    border-color: var(--primary-light);
    background-color: rgba(84, 104, 255, 0.03);
}

.poll-option.selected {
    border-color: var(--primary);
    background-color: rgba(84, 104, 255, 0.1);
}

.poll-option.selected::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3px;
    background-color: var(--primary);
    border-top-left-radius: 6px;
    border-bottom-left-radius: 6px;
}

.poll-percent {
    font-size: 12px;
    font-weight: 500;
    color: var(--primary);
}

.poll-votes {
    margin-top: 10px;
    font-size: 12px;
    color: var(--text-light);
    text-align: right;
}

.resource-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px;
    background-color: var(--background);
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    color: var(--text-dark);
    border: 1px solid var(--border);
}

.resource-link:hover {
    background-color: rgba(84, 104, 255, 0.05);
    border-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.resource-icon {
    width: 36px;
    height: 36px;
    background-color: rgba(84, 104, 255, 0.1);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.resource-info {
    flex: 1;
}

.resource-title {
    font-size: 13px;
    font-weight: 500;
}

.resource-desc {
    font-size: 11px;
    color: var(--text-light);
}

/* Responsive Styles */
@media (max-width: 700px) {
    .chat-container {
        width: 100%;
        height: 100%;
        border-radius: 0;
    }

    .message {
        max-width: 90%;
    }

    .header-actions {
        gap: 8px;
    }

    .icon-button {
        width: 32px;
        height: 32px;
    }

    .tabs {
        padding: 0 10px;
    }

    .tab {
        padding: 12px 10px;
        font-size: 13px;
    }
}

/* Animation for new messages */
@keyframes popIn {
    0% {
        transform: scale(0.8);
        opacity: 0;
    }

    50% {
        transform: scale(1.05);
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.pop-in {
    animation: popIn 0.3s forwards;
}

/* Resource expansion animation */
.resource-expanded {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.resource-expanded.active {
    max-height: 200px;
}

/* Tooltip Styles */
.tooltip {
    position: relative;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 130%;
    left: 50%;
    transform: translateX(-50%);
    padding: 5px 10px;
    border-radius: 4px;
    background-color: rgba(26, 33, 56, 0.9);
    color: white;
    font-size: 11px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    pointer-events: none;
    z-index: 100;
}

.tooltip::before {
    content: '';
    position: absolute;
    bottom: 120%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 4px;
    border-style: solid;
    border-color: rgba(26, 33, 56, 0.9) transparent transparent transparent;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    pointer-events: none;
    z-index: 100;
}

.tooltip:hover::after,
.tooltip:hover::before {
    opacity: 1;
    visibility: visible;
}

/* Reaction Styles */
.reactions {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 8px;
}

.reaction {
    font-size: 12px;
    padding: 2px 6px 2px 4px;
    background-color: rgba(84, 104, 255, 0.06);
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 3px;
    cursor: pointer;
    transition: var(--transition);
}

.reaction:hover {
    background-color: rgba(84, 104, 255, 0.15);
}

.reaction.active {
    background-color: rgba(84, 104, 255, 0.2);
    font-weight: 500;
}




@media (min-width: 1400px) {
    .container, .container-lg, .container-md, .container-sm, .container-xl, .container-xxl {
        max-width: 1750px;
    }
}


.table th {
    font-size: smaller;
    background-color: #C3CCD4;
}

.btn-primary {
    --cui-btn-bg: #72889B;
    --cui-btn-border-color: #72889B;
    --cui-btn-hover-bg: #B1BCC7;
    --cui-btn-hover-border-color: #B1BCC7;
}

a {
    color: #52616f;
}

.footer {
        --cui-footer-bg: #B1BCC7;
}

.table thead {
  position: sticky;
  top: 40px;
  background: white;
}