:root {
    --chatbot-primary: var(--primary-color, #0d6efd);
    --chatbot-primary-hover: var(--secondary-color, #0b5ed7);
    --chatbot-bg: rgba(255, 255, 255, 0.95);
    --chatbot-glass-border: rgba(0, 0, 0, 0.08);
    --chatbot-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    --chatbot-header-bg: linear-gradient(135deg, var(--primary-color, #0d6efd), var(--secondary-color, #0a58ca));
    --chatbot-msg-student: var(--primary-color, #0d6efd);
    --chatbot-msg-student-text: #ffffff;
    --chatbot-msg-bot: #f1f3f5;
    --chatbot-msg-bot-text: #212529;
    --chatbot-msg-agent: #198754;
    --chatbot-msg-agent-text: #ffffff;
}

/* Floating Button Styles */
.chatbot-float-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: var(--chatbot-header-bg);
    color: #ffffff !important;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(var(--primary-rgb, 13, 110, 253), 0.4);
    cursor: pointer;
    z-index: 9999;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.chatbot-float-btn:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 6px 20px rgba(var(--primary-rgb, 13, 110, 253), 0.5);
}

.chatbot-float-btn i {
    font-size: 24px;
}

.chatbot-float-btn .badge-unread {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #dc3545;
    color: #ffffff;
    border-radius: 50%;
    padding: 4px 8px;
    font-size: 10px;
    font-weight: bold;
    border: 2px solid #ffffff;
}

/* Chat Widget Container */
.chatbot-widget {
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 380px;
    height: 550px;
    background: var(--chatbot-bg);
    border: 1px solid var(--chatbot-glass-border);
    border-radius: 16px;
    box-shadow: var(--chatbot-shadow);
    display: flex;
    flex-direction: column;
    z-index: 9999;
    overflow: hidden;
    opacity: 0;
    transform: translateY(30px) scale(0.95);
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    backdrop-filter: blur(10px);
}

.chatbot-widget.active {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

/* Header Styles */
.chatbot-header {
    background: var(--chatbot-header-bg);
    color: #ffffff;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.chatbot-header .bot-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.chatbot-header .bot-avatar {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.chatbot-header .bot-avatar i {
    font-size: 20px;
    color: #ffffff;
}

.chatbot-header .status-dot {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 10px;
    height: 10px;
    background: #28a745;
    border-radius: 50%;
    border: 2px solid var(--chatbot-primary, #0d6efd);
    box-shadow: 0 0 6px #28a745;
}

.chatbot-header .bot-details h5 {
    margin: 0;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.chatbot-header .bot-details span {
    font-size: 11px;
    opacity: 0.8;
    display: block;
}

.chatbot-header .header-actions button {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.8);
    font-size: 16px;
    cursor: pointer;
    transition: color 0.2s;
    padding: 4px;
}

.chatbot-header .header-actions button:hover {
    color: #ffffff;
}

/* Body / Chat Area */
.chatbot-body {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
    background: #f8f9fa;
}

/* Message Bubbles */
.chat-message {
    display: flex;
    flex-direction: column;
    max-width: 80%;
    animation: messageFadeIn 0.3s ease forwards;
}

@keyframes messageFadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.chat-message.bot, .chat-message.agent, .chat-message.system {
    align-self: flex-start;
}

.chat-message .bubble {
    padding: 10px 14px;
    border-radius: 12px;
    font-size: 13.5px;
    line-height: 1.4;
    word-break: break-word;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.chat-message.student .bubble {
    background: var(--chatbot-msg-student);
    color: var(--chatbot-msg-student-text);
    border-bottom-right-radius: 2px;
}

.chat-message.bot .bubble {
    background: var(--chatbot-msg-bot);
    color: var(--chatbot-msg-bot-text);
    border-bottom-left-radius: 2px;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.chat-message.agent .bubble {
    background: var(--chatbot-msg-agent);
    color: var(--chatbot-msg-agent-text);
    border-bottom-left-radius: 2px;
}

.chat-message.system {
    align-self: center;
    max-width: 90%;
    margin: 8px 0;
}

.chat-message.system .bubble {
    background: rgba(0, 0, 0, 0.05);
    color: #6c757d;
    font-size: 11px;
    text-align: center;
    border-radius: 20px;
    padding: 4px 12px;
    box-shadow: none;
}

.chat-message .time {
    font-size: 10px;
    color: #adb5bd;
    margin-top: 4px;
    align-self: flex-end;
}

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

.chat-message.bot .time, .chat-message.agent .time {
    align-self: flex-start;
}

/* Quick Replies / Options */
.chatbot-options {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 5px;
    width: 100%;
}

.chatbot-option-btn {
    background: #ffffff;
    border: 1px solid #dee2e6;
    color: var(--chatbot-primary);
    padding: 8px 12px;
    border-radius: 20px;
    font-size: 12.5px;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    width: 100%;
    display: block;
}

.chatbot-option-btn:hover {
    background: var(--chatbot-primary);
    color: #ffffff;
    border-color: var(--chatbot-primary);
}

/* Footer / Input Area */
.chatbot-footer {
    padding: 12px 16px;
    background: #ffffff;
    border-top: 1px solid #dee2e6;
    display: flex;
    align-items: center;
    gap: 10px;
}

.chatbot-input-group {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
}

.chatbot-input {
    width: 100%;
    border: 1px solid #ced4da;
    border-radius: 24px;
    padding: 10px 45px 10px 18px;
    font-size: 13.5px;
    outline: none;
    transition: border-color 0.2s;
    background: #f8f9fa;
}

.chatbot-input:focus {
    border-color: var(--chatbot-primary);
    background: #ffffff;
}

.chatbot-btn-send {
    position: absolute;
    right: 8px;
    background: var(--chatbot-primary);
    color: #ffffff;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s;
}

.chatbot-btn-send:hover {
    background: var(--chatbot-primary-hover);
}

.chatbot-btn-send i {
    font-size: 14px;
}

.chatbot-btn-attach {
    background: none;
    border: none;
    color: #6c757d;
    font-size: 18px;
    cursor: pointer;
    transition: color 0.2s;
    padding: 4px;
    display: flex;
    align-items: center;
}

.chatbot-btn-attach:hover {
    color: var(--chatbot-primary);
}

/* Hide default file input */
#chatbot-file-input {
    display: none;
}

/* Scrollbar styles for chatbot body */
.chatbot-body::-webkit-scrollbar {
    width: 6px;
}

.chatbot-body::-webkit-scrollbar-track {
    background: #f8f9fa;
}

.chatbot-body::-webkit-scrollbar-thumb {
    background: #ced4da;
    border-radius: 3px;
}

.chatbot-body::-webkit-scrollbar-thumb:hover {
    background: #adb5bd;
}