/* Base */
:root {
    --font-main: system-ui, -apple-system, "Segoe UI", Roboto, Ubuntu, "Helvetica Neue", sans-serif;
    --border-radius: 8px;
    --transition: all 0.3s ease;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 16px rgba(0,0,0,0.1);
    --max-width: 1400px;
    --sidebar-width: 300px;
    --sidebar-collapsed: 60px;
    --header-height: 60px;
    --tools-height: 50px;
    --input-height: 120px;
}

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

body {
    font-family: var(--font-main);
    line-height: 1.6;
    overflow: hidden;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

button, input, select, textarea {
    font-family: inherit;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: var(--border-radius);
    padding: 8px 16px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

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

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

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

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

.btn-danger {
    background-color: var(--danger-color);
    color: var(--danger-text);
}

.btn-danger:hover {
    background-color: var(--danger-hover);
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: 50%;
    background-color: var(--btn-icon-bg);
}

.btn-icon:hover {
    background-color: var(--btn-icon-hover);
}

.btn-icon .icon {
    font-size: 1.2rem;
}

.icon {
    display: inline-block;
}

/* Layout */
.app-container {
    display: flex;
    height: 100%;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    height: 100%;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    background-color: var(--sidebar-bg);
    overflow-y: auto;
    position: relative;
    z-index: 10;
}

.sidebar-collapsed .sidebar {
    width: var(--sidebar-collapsed);
}

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

.section-header {
    padding: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}

.section-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--title-color);
}

.toggle-section {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    transition: var(--transition);
}

.toggle-section:hover {
    color: var(--text-color);
}

.section-content {
    padding: 0 15px 15px;
}

/* User section */
.user-info {
    margin-bottom: 15px;
}

#auth-status {
    font-weight: 500;
    margin-bottom: 8px;
}

.user-details {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.auth-buttons {
    display: flex;
    gap: 10px;
}

.control-buttons {
    display: flex;
    gap: 10px;
    justify-content: flex-start;
    margin-top: 10px;
}

/* Model section */
.select-styled {
    width: 100%;
    padding: 8px 12px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
    color: var(--text-color);
    cursor: pointer;
}

.stream-toggle {
    margin-top: 15px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--switch-bg);
    transition: var(--transition);
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: var(--switch-handle);
    transition: var(--transition);
    border-radius: 50%;
}

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

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

/* History section */
.session-list {
    margin-bottom: 15px;
    max-height: 300px;
    overflow-y: auto;
}

.session-item {
    display: flex;
    align-items: center;
    padding: 8px;
    border-radius: var(--border-radius);
    margin-bottom: 5px;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-color);
}

.session-item:hover {
    background-color: var(--hover-bg);
}

.session-item.active {
    background-color: var(--active-bg);
    font-weight: 500;
}

/* Main area */
.main-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    position: relative;
}

.mobile-header {
    display: none;
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--header-bg);
}

.mobile-header h1 {
    font-size: 1.2rem;
    text-align: center;
}

.toggle-sidebar {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    position: absolute;
    left: 10px;
    top: 10px;
    color: var(--text-color);
}

/* Chat area */
.chat-area {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    position: relative;
}

.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    color: var(--text-muted);
}

.welcome-screen h1 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--title-color);
}

.chat-container {
    display: none;
    max-width: 900px;
    margin: 0 auto;
}

.message {
    display: flex;
    margin-bottom: 20px;
}

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

.message-assistant {
    justify-content: flex-start;
}

.message-content {
    max-width: 80%;
    padding: 12px;
    border-radius: var(--border-radius);
    position: relative;
}

.message-user .message-content {
    background-color: var(--user-msg-bg);
    color: var(--user-msg-text);
}

.message-assistant .message-content {
    background-color: var(--assistant-msg-bg);
    color: var(--assistant-msg-text);
}

.message-actions {
    display: flex;
    gap: 5px;
    position: absolute;
    top: 5px;
    right: 5px;
    opacity: 0;
    transition: var(--transition);
}

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

.message-action-btn {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: none;
    background: var(--action-btn-bg);
    color: var(--action-btn-color);
    cursor: pointer;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.message-timestamp {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 5px;
}

.message img {
    max-width: 100%;
    border-radius: var(--border-radius);
}

.file-attachment {
    display: flex;
    align-items: center;
    padding: 8px;
    background-color: var(--attachment-bg);
    border-radius: var(--border-radius);
    margin-top: 10px;
}

.file-attachment .icon {
    margin-right: 8px;
    font-size: 1.2rem;
}

/* Code blocks styling */
.message pre {
    background-color: var(--code-bg);
    border-radius: var(--border-radius);
    padding: 10px;
    overflow-x: auto;
    margin: 10px 0;
}

.message code {
    font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
    font-size: 0.9rem;
    color: var(--code-text);
}

/* Tools bar */
.tools-bar {
    height: var(--tools-height);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 15px;
    overflow-x: auto;
    gap: 10px;
    background-color: var(--tools-bg);
}

.tool-button {
    display: flex;
    align-items: center;
    padding: 5px 10px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    background-color: var(--tool-btn-bg);
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition);
}

.tool-button:hover {
    background-color: var(--tool-btn-hover);
}

.tool-button .icon {
    margin-right: 5px;
}

.tool-button.active {
    background-color: var(--primary-color);
    color: var(--primary-text);
}

/* Input area */
.input-area {
    padding: 15px;
    border-top: 1px solid var(--border-color);
    background-color: var(--input-area-bg);
}

.input-container {
    display: flex;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--input-bg);
    overflow: hidden;
}

#message-input {
    flex: 1;
    padding: 12px;
    border: none;
    outline: none;
    resize: none;
    background-color: transparent;
    color: var(--text-color);
    max-height: 150px;
}

.input-buttons {
    display: flex;
    align-items: flex-end;
    padding: 8px;
}

.file-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
}

.file-preview-item {
    position: relative;
    width: 80px;
    height: 80px;
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.file-preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.file-preview-item .remove-file {
    position: absolute;
    top: 2px;
    right: 2px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: rgba(0,0,0,0.5);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    cursor: pointer;
}

.file-preview-doc {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    width: 100%;
    height: 100%;
    padding: 5px;
    font-size: 0.7rem;
    color: var(--text-muted);
    background-color: var(--file-preview-bg);
}

.file-preview-doc .icon {
    font-size: 1.5rem;
    margin-bottom: 5px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--modal-overlay);
    z-index: 100;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: var(--modal-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow: auto;
    position: relative;
}

.modal-header {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    background-color: var(--modal-bg);
    z-index: 1;
}

.modal-header h2 {
    font-size: 1.2rem;
    color: var(--title-color);
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
}

.modal-body {
    padding: 20px;
}

/* Tabs */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.tab-btn {
    padding: 10px 20px;
    border: none;
    background: none;
    cursor: pointer;
    color: var(--text-muted);
    border-bottom: 2px solid transparent;
    transition: var(--transition);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
}

#general-tab {
    display: block;
}

/* Form */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--label-color);
}

.form-group input[type="text"],
.form-group textarea {
    width: 100%;
    padding: 8px 12px;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
    color: var(--text-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group .code-area {
    font-family: 'Menlo', 'Monaco', 'Courier New', monospace;
    min-height: 150px;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
}

small {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: block;
    margin-top: 5px;
}

/* Icon selector */
.icon-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 5px;
}

.icon-selector .icon {
    font-size: 1.5rem;
    padding: 5px;
    cursor: pointer;
    border-radius: var(--border-radius);
    border: 1px solid transparent;
}

.icon-selector .icon.selected {
    border-color: var(--primary-color);
    background-color: var(--primary-light);
}

/* Settings */
.setting-section {
    margin-bottom: 25px;
}

.setting-section h3 {
    margin-bottom: 15px;
    font-size: 1rem;
    color: var(--title-color);
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

/* Tools manager */
.tools-manager {
    margin-bottom: 20px;
}

.tools-list {
    margin-bottom: 15px;
    max-height: 300px;
    overflow-y: auto;
}

.tool-item {
    display: flex;
    align-items: center;
    padding: 10px;
    border-radius: var(--border-radius);
    margin-bottom: 5px;
    background-color: var(--tool-item-bg);
    border: 1px solid var(--border-color);
}

.tool-item .icon {
    margin-right: 10px;
    font-size: 1.2rem;
}

.tool-item .tool-info {
    flex: 1;
}

.tool-item .tool-name {
    font-weight: 500;
}

.tool-item .tool-description {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.tool-item .tool-actions {
    display: flex;
    gap: 8px;
}

/* Sessions manager */
.sessions-list {
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 15px;
}

.session-manager-item {
    display: flex;
    align-items: center;
    padding: 10px;
    border-radius: var(--border-radius);
    margin-bottom: 5px;
    border: 1px solid var(--border-color);
}

.session-manager-item .session-info {
    flex: 1;
}

.session-manager-item .session-title {
    font-weight: 500;
}

.session-manager-item .session-date {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.session-manager-item .session-actions {
    display: flex;
    gap: 8px;
}

.sessions-actions {
    display: flex;
    gap: 10px;
}

/* Responsive */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        position: absolute;
        top: var(--header-height);
        left: -100%;
        height: calc(100% - var(--header-height));
        transition: left 0.3s ease;
    }
    
    .sidebar.active {
        left: 0;
    }
    
    .mobile-header {
        display: flex;
        height: var(--header-height);
        align-items: center;
        justify-content: center;
    }
    
    .main-area {
        height: calc(100vh - var(--header-height));
    }
    
    .tools-bar {
        padding: 0 10px;
    }
    
    .input-area {
        padding: 10px;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.message {
    animation: fadeIn 0.3s ease;
}

.message-content {
    animation: slideInUp 0.3s ease;
}