/* UniAssist Tutor Page Styles */

.tutor-container {
    display: grid;
    grid-template-columns: 240px 1fr 280px;
    min-height: 100vh;
    padding-top: 70px;
}

/* Course Sidebar */
.course-sidebar {
    background: var(--dark-light);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
}

.sidebar-header {
    margin-bottom: 1.5rem;
}

.sidebar-header h3 {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 600;
}

.course-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex: 1;
}

.course-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 10px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.3s;
    text-align: left;
}

.course-btn:hover {
    background: var(--dark-lighter);
    color: var(--text);
}

.course-btn.active {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(14, 165, 233, 0.2) 100%);
    border-color: var(--primary);
    color: var(--text);
}

.course-icon {
    font-size: 1.25rem;
}

.course-name {
    font-weight: 500;
    font-size: 0.9rem;
}

.sidebar-footer {
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    text-align: center;
}

.sidebar-footer p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Chat Area */
.chat-area {
    display: flex;
    flex-direction: column;
    background: var(--dark);
    height: calc(100vh - 70px);
}

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

.course-badge {
    background: var(--gradient);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.action-btn {
    background: var(--dark-light);
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.3s;
}

.action-btn:hover {
    background: var(--dark-lighter);
    color: var(--text);
}

/* Chat Messages */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.message {
    display: flex;
    gap: 1rem;
    max-width: 85%;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.ai-message .message-avatar {
    background: var(--gradient);
}

.user-message {
    flex-direction: row-reverse;
    align-self: flex-end;
}

.user-message .message-avatar {
    background: var(--dark-lighter);
}

.message-content {
    flex: 1;
}

.message-text {
    background: var(--dark-light);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1rem 1.25rem;
    line-height: 1.7;
}

.user-message .message-text {
    background: var(--primary);
    border-color: var(--primary);
}

.message-text h3 {
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.message-text ul {
    margin: 0.75rem 0;
    padding-left: 1.5rem;
}

.message-text li {
    margin: 0.5rem 0;
}

.message-text code {
    background: var(--dark);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-family: 'Fira Code', monospace;
    font-size: 0.9em;
}

.message-text pre {
    background: var(--dark);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    overflow-x: auto;
    margin: 1rem 0;
}

.message-text pre code {
    background: none;
    padding: 0;
}

/* Topic Hints */
.topic-hints {
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    border-top: 1px solid var(--border);
    background: var(--dark-light);
}

.hint-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.topic-chip {
    background: var(--dark);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.4rem 0.875rem;
    border-radius: 20px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.3s;
}

.topic-chip:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

/* Chat Input */
.chat-input-container {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
    background: var(--dark-light);
}

.input-wrapper {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

#user-input {
    flex: 1;
    background: var(--dark);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1rem;
    color: var(--text);
    font-size: 1rem;
    font-family: inherit;
    resize: none;
    min-height: 50px;
    max-height: 150px;
}

#user-input:focus {
    outline: none;
    border-color: var(--primary);
}

#user-input::placeholder {
    color: var(--text-muted);
}

.send-btn {
    background: var(--gradient);
    border: none;
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s;
}

.send-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(99, 102, 241, 0.4);
}

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

.input-hint {
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* Session Panel */
.session-panel {
    background: var(--dark-light);
    border-left: 1px solid var(--border);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.panel-section {
    background: var(--dark);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1rem;
}

.panel-section h4 {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.stat-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.mini-stat {
    text-align: center;
    padding: 0.5rem;
    background: var(--dark-light);
    border-radius: 8px;
}

.mini-stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-light);
}

.mini-stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.topics-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.topic-tag {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-light);
    padding: 0.35rem 0.75rem;
    border-radius: 15px;
    font-size: 0.75rem;
}

.empty-state {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-style: italic;
}

.progress-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.progress-label {
    font-size: 0.8rem;
    color: var(--text);
}

.progress-bar {
    height: 8px;
    background: var(--dark-light);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--gradient);
    border-radius: 4px;
    transition: width 0.5s;
}

.progress-value {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: right;
}

.panel-section.featured {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(14, 165, 233, 0.1) 100%);
    border-color: var(--primary);
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: 0.5rem 0;
    font-size: 0.85rem;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
}

.feature-list li:last-child {
    border: none;
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    gap: 0.3rem;
    padding: 0.75rem 1rem;
}

.typing-dot {
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out;
}

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

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

@keyframes typing {

    0%,
    100% {
        opacity: 0.3;
        transform: scale(0.8);
    }

    50% {
        opacity: 1;
        transform: scale(1);
    }
}

/* Responsive */
@media (max-width: 1100px) {
    .tutor-container {
        grid-template-columns: 1fr;
    }

    .course-sidebar,
    .session-panel {
        display: none;
    }
}

/* KaTeX Styles */
.katex {
    font-size: 1.1em;
}

.katex-display {
    margin: 1rem 0;
    overflow-x: auto;
}