/* Google Material Design Inspired Styles */
:root {
    --primary-color: #4285F4;
    --secondary-color: #34A853;
    --background-color: #F8F9FA;
    --text-color: #202124;
    --chat-bubble-color: #E8F0FE;
    --accent-color: #EA4335;
    --border-radius: 8px;
    --spacing: 16px;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --card-background: #FFFFFF;
    --border-color: #E8EAED;
    --navbar-background: #FFFFFF;
    --sidebar-background: #F8F9FA;
    --input-background: #FFFFFF;
    --message-background: #FFFFFF;
    --ai-message-background: #E8F0FE;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --primary-color: #8AB4F8;
    --secondary-color: #81C995;
    --background-color: #1A1A1A;
    --text-color: #FFFFFF;
    --chat-bubble-color: #2D2D2D;
    --accent-color: #F28B82;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    --card-background: #2D2D2D;
    --border-color: #444444;
    --navbar-background: #1F1F1F;
    --sidebar-background: #1A1A1A;
    --input-background: #2D2D2D;
    --message-background: #2D2D2D;
    --ai-message-background: #1E40AF;
}

/* Global Styles */
body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* Custom Bootstrap Overrides */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: all 0.2s ease;
}

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

.btn-primary:hover {
    background-color: #3367D6;
    border-color: #3367D6;
    transform: translateY(-1px);
}

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

.btn-success:hover {
    background-color: #2E7D32;
    border-color: #2E7D32;
    transform: translateY(-1px);
}

.btn-warning {
    background-color: #FF9800;
    border-color: #FF9800;
}

.btn-warning:hover {
    background-color: #F57C00;
    border-color: #F57C00;
    transform: translateY(-1px);
}

.card {
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    border: none;
    transition: all 0.2s ease;
    background-color: var(--card-background);
    color: var(--text-color);
}

.card:hover {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
}

.form-control, .form-select {
    border-radius: var(--border-radius);
    border: 2px solid var(--border-color);
    transition: all 0.2s ease;
    background-color: var(--input-background);
    color: var(--text-color);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(66, 133, 244, 0.25);
}

/* Navigation */
.navbar {
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    background-color: var(--navbar-background) !important;
    z-index: 1030;
}

/* Dropdown Menu Fix */
.dropdown-menu {
    z-index: 1050 !important;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.navbar-brand {
    font-weight: 700;
    color: var(--primary-color) !important;
}

.nav-link {
    font-weight: 500;
    transition: all 0.2s ease;
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

/* Dashboard Cards */
.conversation-card, .student-card {
    transition: all 0.2s ease;
    border-left: 4px solid var(--primary-color);
}

.conversation-card:hover, .student-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.15);
}

/* Chat Styles */
.chat-messages {
    height: 60vh;
    overflow-y: auto;
    scroll-behavior: smooth;
}

.message-container {
    display: flex;
    align-items: flex-start;
    margin-bottom: 12px;
}

.message-container.user-message {
    justify-content: flex-end;
}

.message-container.ai-message {
    justify-content: flex-start;
}

.message-bubble {
    max-width: 70%;
    padding: 12px 16px;
    border-radius: 18px;
    position: relative;
    animation: messageSlide 0.3s ease;
}

.user-bubble {
    background-color: var(--primary-color);
    color: white;
    border-bottom-right-radius: 4px;
}

.ai-bubble {
    background-color: var(--chat-bubble-color);
    color: var(--text-color);
    border-bottom-left-radius: 4px;
}

.message-header {
    font-size: 0.875rem;
    opacity: 0.9;
}

.message-content {
    word-wrap: break-word;
    white-space: pre-wrap;
}

.message-time {
    font-size: 0.75rem;
    opacity: 0.7;
}

.user-bubble .message-time {
    color: rgba(255, 255, 255, 0.8);
}

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

/* Chat Input */
.chat-input {
    background-color: var(--card-background);
    border-top: 1px solid var(--border-color);
}

.chat-input textarea {
    resize: none;
    max-height: 120px;
    border: 2px solid var(--border-color);
    border-radius: 20px;
    padding: 12px var(--spacing);
    background-color: var(--input-background);
    color: var(--text-color);
}

.chat-input textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(66, 133, 244, 0.25);
}

/* Empty States */
.empty-chat {
    color: #9E9E9E;
}

/* Theme Switcher */
.theme-switcher {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.theme-switcher input {
    opacity: 0;
    width: 0;
    height: 0;
}

.theme-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 34px;
}

.theme-slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .theme-slider {
    background-color: var(--primary-color);
}

input:checked + .theme-slider:before {
    transform: translateX(26px);
}

.theme-icon {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 14px;
    color: #666;
    transition: .4s;
}

.theme-icon.sun {
    left: 8px;
}

.theme-icon.moon {
    right: 8px;
}

[data-theme="dark"] .theme-icon {
    color: #fff;
}

/* Dark Mode Specific Overrides */
[data-theme="dark"] .navbar-light .navbar-nav .nav-link {
    color: var(--text-color) !important;
}

[data-theme="dark"] .navbar-light .navbar-brand {
    color: var(--primary-color) !important;
}

[data-theme="dark"] .dropdown-menu {
    background-color: var(--card-background);
    border-color: var(--border-color);
}

[data-theme="dark"] .dropdown-item {
    color: var(--text-color);
}

[data-theme="dark"] .dropdown-item:hover,
[data-theme="dark"] .dropdown-item:focus {
    background-color: var(--border-color);
    color: var(--text-color);
}

/* Delete Account Styling */
.dropdown-item.text-danger {
    color: #dc3545 !important;
    font-weight: 500;
}

.dropdown-item.text-danger:hover,
.dropdown-item.text-danger:focus {
    background-color: #dc3545 !important;
    color: #fff !important;
}

[data-theme="dark"] .dropdown-item.text-danger {
    color: #ff6b6b !important;
}

[data-theme="dark"] .dropdown-item.text-danger:hover,
[data-theme="dark"] .dropdown-item.text-danger:focus {
    background-color: #dc3545 !important;
    color: #fff !important;
}

[data-theme="dark"] .badge {
    background-color: var(--primary-color) !important;
    color: #000 !important;
}

[data-theme="dark"] .text-muted {
    color: #9CA3AF !important;
}

[data-theme="dark"] .alert {
    background-color: var(--card-background);
    border-color: var(--border-color);
    color: var(--text-color);
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(138, 180, 248, 0.25);
}

[data-theme="dark"] .btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #000;
}

[data-theme="dark"] .btn-success {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    color: #000;
}

[data-theme="dark"] h1, [data-theme="dark"] h2, [data-theme="dark"] h3, 
[data-theme="dark"] h4, [data-theme="dark"] h5, [data-theme="dark"] h6 {
    color: var(--text-color);
}

[data-theme="dark"] .card-title {
    color: var(--text-color);
}

[data-theme="dark"] .card-text {
    color: var(--text-color);
}

/* School Name Styling */
.navbar-text {
    color: var(--text-color) !important;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    margin-bottom: 0;
    line-height: 1.5;
}

.navbar-text .fw-medium {
    color: var(--primary-color);
}

[data-theme="dark"] .navbar-text {
    color: #E8EAED !important;
}

[data-theme="dark"] .navbar-text .fw-medium {
    color: var(--primary-color);
}

/* Chat Input Alignment */
.chat-form .input-group {
    align-items: stretch;
}

.chat-textarea {
    resize: none;
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.chat-send-btn {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
    border-left: 0;
    padding: 0.5rem 1rem;
    white-space: nowrap;
}

.chat-send-btn:hover {
    border-left: 0;
}

/* Print Message Button */
.print-message-btn {
    opacity: 0.7;
    transition: opacity 0.2s ease;
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
}

.message-container:hover .print-message-btn {
    opacity: 1;
}

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

[data-theme="dark"] .print-message-btn {
    border-color: var(--border-color);
    color: var(--text-color);
}

[data-theme="dark"] .print-message-btn:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #000;
}

/* Course Search Styles */
.course-card {
    transition: all 0.2s ease;
    border: 1px solid var(--border-color);
    height: 100%;
}

.course-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.course-card .card-body {
    display: flex;
    flex-direction: column;
}

.course-card .card-title {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.course-card .mt-auto {
    margin-top: auto;
}

[data-theme="dark"] .course-card {
    border-color: var(--border-color);
    background-color: var(--card-background);
}

[data-theme="dark"] .course-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

/* Course search input styling */
#courseSearchInput {
    border-radius: var(--border-radius);
}

#courseSearchInput:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(66, 133, 244, 0.25);
}

/* Department and grade filter styling */
.form-select {
    border-radius: var(--border-radius);
}

.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(66, 133, 244, 0.25);
}

/* Responsive Design */
@media (max-width: 768px) {
    .message-bubble {
        max-width: 85%;
    }
    
    .chat-messages {
        height: 50vh;
    }
    
    .card-body {
        padding: 12px;
    }
    
    .btn {
        padding: 8px 12px;
        font-size: 0.875rem;
    }
}

/* Scrollbar Styling */
.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 10px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* Feature Icons */
.feature-icon, .hero-icon {
    margin-bottom: var(--spacing);
}

/* Badges */
.badge {
    font-weight: 500;
    padding: 6px 12px;
    border-radius: 20px;
}

/* Alerts */
.alert {
    border-radius: var(--border-radius);
    border: none;
    font-weight: 500;
}

.alert-success {
    background-color: #E8F5E8;
    color: #2E7D32;
}

.alert-danger {
    background-color: #FFEBEE;
    color: #C62828;
}

.alert-info {
    background-color: #E3F2FD;
    color: #1565C0;
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Utilities */
.text-primary {
    color: var(--primary-color) !important;
}

.text-success {
    color: var(--secondary-color) !important;
}

.bg-primary {
    background-color: var(--primary-color) !important;
}

.bg-success {
    background-color: var(--secondary-color) !important;
}

/* Footer */
footer {
    margin-top: auto;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

/* Smooth Transitions */
* {
    transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

/* Focus States */
.btn:focus, .form-control:focus, .form-select:focus {
    outline: none;
    box-shadow: 0 0 0 0.2rem rgba(66, 133, 244, 0.25);
}

/* Hover Effects */
.card-title a:hover {
    color: var(--primary-color) !important;
    text-decoration: none;
}

/* Course Search Slide-in Panel */
.course-search-panel {
    position: fixed;
    top: 0;
    right: -50%;
    width: 50%;
    height: 100vh;
    background: var(--card-background);
    box-shadow: -2px 0 20px rgba(0, 0, 0, 0.15);
    z-index: 1050;
    transition: right 0.3s ease-in-out;
    display: flex;
    flex-direction: column;
}

.course-search-panel.show {
    right: 0;
}

.course-search-header {
    background: var(--primary-color);
    color: white;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.course-search-content {
    flex: 1;
    padding: 1.5rem;
    overflow-y: auto;
}

.course-results {
    max-height: calc(100vh - 300px);
    overflow-y: auto;
}

.course-search-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1040;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease-in-out, visibility 0.3s ease-in-out;
}

.course-search-backdrop.show {
    opacity: 1;
    visibility: visible;
}

/* Responsive adjustments for mobile */
@media (max-width: 768px) {
    .course-search-panel {
        width: 90%;
        right: -90%;
    }
}

@media (max-width: 576px) {
    .course-search-panel {
        width: 100%;
        right: -100%;
    }
}

/* Conversation Starter Styles */
.conversation-starters .starter-btn {
    border-radius: var(--border-radius);
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    background-color: transparent;
    text-align: left;
    display: flex;
    align-items: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.conversation-starters .starter-btn:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(66, 133, 244, 0.2);
}

.conversation-starters .starter-btn:focus {
    outline: none;
    box-shadow: 0 0 0 0.2rem rgba(66, 133, 244, 0.25);
}

.conversation-starters .starter-btn i {
    min-width: 16px;
    margin-right: 0.5rem;
}

.conversation-starters .btn-outline-success {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

.conversation-starters .btn-outline-success:hover {
    background-color: var(--secondary-color);
    color: white;
    box-shadow: 0 2px 8px rgba(52, 168, 83, 0.2);
}

/* Dark mode conversation starters */
[data-theme="dark"] .conversation-starters .starter-btn {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

[data-theme="dark"] .conversation-starters .starter-btn:hover {
    background-color: var(--primary-color);
    color: #000;
}

[data-theme="dark"] .conversation-starters .btn-outline-success {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

[data-theme="dark"] .conversation-starters .btn-outline-success:hover {
    background-color: var(--secondary-color);
    color: #000;
}

/* Responsive adjustments for conversation starters */
@media (max-width: 768px) {
    .conversation-starters .starter-btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.85rem;
    }
    
    .conversation-starters .row.g-2 {
        gap: 0.5rem;
    }
}

/* Delete conversation button styling */
.delete-conversation-btn {
    opacity: 0.6;
    transition: opacity 0.2s ease;
    font-size: 0.8rem;
    padding: 0.2rem;
    text-decoration: none;
}

.delete-conversation-btn:hover {
    opacity: 1;
    color: var(--accent-color) !important;
}

.delete-conversation-btn:focus {
    outline: none;
    box-shadow: 0 0 0 0.2rem rgba(234, 67, 53, 0.25);
}

/* Hide delete buttons on mobile to prevent accidental taps */
@media (max-width: 576px) {
    .delete-conversation-btn {
        display: none;
    }
}

/* Print Styles */
@media print {
    .navbar, .chat-input, .btn, .course-search-panel, .course-search-backdrop {
        display: none !important;
    }
    
    .chat-messages {
        height: auto !important;
        overflow: visible !important;
    }
}