:root {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --accent-primary: #4a90e2;
    --accent-secondary: #357abd;
    --border-color: #404040;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --message-user: #4a90e2;
    --message-assistant: #2d2d2d;
    --sidebar-width: 280px;
}

[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --accent-primary: #4a90e2;
    --accent-secondary: #357abd;
    --border-color: #dee2e6;
    --message-user: #4a90e2;
    --message-assistant: #f8f9fa;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
}



/* Notification Styles */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, #4a90e2, #357abd);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    max-width: 400px;
    animation: slideIn 0.3s ease-out;
}

.notification.success {
    background: linear-gradient(135deg, #28a745, #20c997);
}

.notification.error {
    background: linear-gradient(135deg, #dc3545, #c82333);
}

.notification.info {
    background: linear-gradient(135deg, #17a2b8, #138496);
}

.notification button {
    background: none;
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    margin-left: auto;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Sidebar Styles */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.new-chat-btn {
    width: 100%;
    padding: 12px;
    background-color: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background-color 0.2s;
}

.new-chat-btn:hover {
    background-color: var(--accent-secondary);
}

.characters-list {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
}

.character-card {
    display: flex;
    align-items: center;
    padding: 16px;
    margin-bottom: 12px;
    background-color: var(--bg-tertiary);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
    border: 2px solid transparent;
}

.character-card:hover {
    background-color: var(--bg-primary);
    transform: translateY(-2px);
}

.character-card.active {
    border-color: var(--accent-primary);
    background-color: var(--accent-primary);
    color: white;
}

.character-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
    margin-right: 12px;
    flex-shrink: 0;
}

.character-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.character-info h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.character-info p {
    font-size: 13px;
    color: var(--text-secondary);
}

.character-card.active .character-info p {
    color: rgba(255, 255, 255, 0.8);
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.resources-btn, .settings-btn {
    padding: 12px;
    background-color: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
}

.resources-btn:hover, .settings-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Main Content Styles */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-primary);
}

.chat-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-secondary);
}

.current-character {
    display: flex;
    align-items: center;
    gap: 12px;
}

.character-avatar-small {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    overflow: hidden;
}

.character-avatar-small img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.character-details h2 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 2px;
}

.character-details p {
    font-size: 14px;
    color: var(--text-secondary);
}

.chat-controls {
    display: flex;
    gap: 12px;
}

.voice-toggle, .clear-chat {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 8px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.voice-toggle:hover, .clear-chat:hover {
    background-color: var(--bg-primary);
}

.voice-toggle.active {
    background-color: var(--success-color);
    color: white;
}

/* Chat Messages */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.message {
    display: flex;
    gap: 12px;
    max-width: 80%;
    animation: fadeIn 0.3s ease-out;
}

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

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}

.message-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.message-content {
    background-color: var(--message-assistant);
    padding: 16px;
    border-radius: 16px;
    position: relative;
}

.message.user .message-content {
    background-color: var(--message-user);
    color: white;
}

.message-content p {
    margin: 0;
    line-height: 1.5;
}

.welcome-message {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    opacity: 0.7;
}

.welcome-message .message-content {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

/* Chat Input */
.chat-input-container {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.typing-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    font-size: 14px;
    color: var(--text-secondary);
}

.typing-dots {
    display: flex;
    gap: 4px;
}

.typing-dots span {
    width: 6px;
    height: 6px;
    background-color: var(--accent-primary);
    border-radius: 50%;
    animation: typingDot 1.4s infinite ease-in-out;
}

.typing-dots span:nth-child(2) {
    animation-delay: 0.16s;
}

.typing-dots span:nth-child(3) {
    animation-delay: 0.32s;
}

.chat-input-wrapper {
    display: flex;
    gap: 12px;
    align-items: flex-end;
}

#message-input {
    flex: 1;
    min-height: 48px;
    max-height: 120px;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 24px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
    resize: none;
    outline: none;
    transition: border-color 0.2s;
}

#message-input:focus {
    border-color: var(--accent-primary);
}

#message-input::placeholder {
    color: var(--text-secondary);
}

.send-button {
    width: 48px;
    height: 48px;
    border: none;
    border-radius: 50%;
    background-color: var(--accent-primary);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.send-button:hover {
    background-color: var(--accent-secondary);
    transform: scale(1.05);
}

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

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--bg-secondary);
    border-radius: 16px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow: hidden;
    animation: modalSlideIn 0.3s ease-out;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 20px;
    font-weight: 600;
}

.close-modal {
    width: 32px;
    height: 32px;
    border: none;
    background: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.close-modal:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
    max-height: 60vh;
}

.resource-section {
    margin-bottom: 32px;
}

.resource-section h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--accent-primary);
}

.resource-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.resource-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background-color: var(--bg-tertiary);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.2s;
}

.resource-link:hover {
    background-color: var(--accent-primary);
    color: white;
    transform: translateY(-2px);
}

.architecture-diagram img {
    width: 100%;
    border-radius: 8px;
    margin: 16px 0;
}

.architecture-text ul {
    margin-left: 20px;
    margin-top: 12px;
}

.architecture-text li {
    margin-bottom: 8px;
    line-height: 1.5;
}

.setting-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
}

.setting-group:last-child {
    border-bottom: none;
}

.setting-group label {
    font-weight: 500;
}

.setting-group input, .setting-group select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes typingDot {
    0%, 80%, 100% {
        transform: scale(0);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* Scrollbar Styles */
.chat-messages::-webkit-scrollbar,
.modal-body::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track,
.modal-body::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.chat-messages::-webkit-scrollbar-thumb,
.modal-body::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb:hover,
.modal-body::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }
    
    .characters-list {
        display: flex;
        overflow-x: auto;
        padding: 12px 20px;
    }
    
    .character-card {
        min-width: 200px;
        margin-right: 12px;
        margin-bottom: 0;
    }
    
    .main-content {
        height: calc(100vh - 200px);
    }
    
    .message {
        max-width: 95%;
    }
}