:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --gray-color: #94a3b8;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --border-radius: 10px;
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --secondary-color: #94a3b8;
    --dark-color: #0f172a;
    --light-color: #1e293b;
    --border-color: #334155;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Vazirmatn', sans-serif;
}

body {
    background-color: var(--light-color);
    color: var(--dark-color);
    transition: var(--transition);
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 100%;
}

/* هدر */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: var(--dark-color);
    color: white;
    box-shadow: var(--shadow);
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo i {
    font-size: 2rem;
    color: var(--primary-color);
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
}

.beta {
    background-color: var(--warning-color);
    color: var(--dark-color);
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.header-controls {
    display: flex;
    gap: 0.8rem;
}

/* محتوای اصلی */
.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* نوار کناری */
.sidebar {
    width: 280px;
    background-color: var(--light-color);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    transition: var(--transition);
}

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

.sidebar-header h3 {
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.conversation-list {
    flex: 1;
    padding: 1rem;
    overflow-y: auto;
}

.conversation-item {
    padding: 0.8rem;
    margin-bottom: 0.5rem;
    background-color: transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
}

.conversation-item:hover {
    background-color: var(--border-color);
}

.conversation-item.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-dark);
}

.conversation-title {
    font-weight: 500;
    margin-bottom: 0.3rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.conversation-date {
    font-size: 0.8rem;
    opacity: 0.7;
}

.sidebar-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.model-selector {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.model-selector label {
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-select {
    padding: 0.6rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    background-color: var(--light-color);
    color: var(--dark-color);
    font-size: 0.9rem;
    transition: var(--transition);
}

.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* منطقه چت */
.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--light-color);
}

.chat-messages {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.welcome-message {
    text-align: center;
    padding: 3rem 1rem;
    max-width: 700px;
    margin: 0 auto;
}

.welcome-icon {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.welcome-message h2 {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.welcome-message p {
    font-size: 1.1rem;
    color: var(--secondary-color);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.quick-btn {
    padding: 1rem;
    background-color: var(--light-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--dark-color);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.quick-btn:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.quick-btn i {
    font-size: 1.5rem;
}

/* پیام‌ها */
.message {
    max-width: 85%;
    padding: 1.2rem;
    border-radius: var(--border-radius);
    line-height: 1.6;
    position: relative;
    animation: fadeIn 0.3s ease;
}

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

.user-message {
    align-self: flex-end;
    background-color: var(--primary-color);
    color: white;
    border-bottom-right-radius: 4px;
}

.bot-message {
    align-self: flex-start;
    background-color: var(--light-color);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: 4px;
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.message-sender {
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.message-time {
    opacity: 0.7;
    font-size: 0.8rem;
}

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

.message-content code {
    background-color: rgba(0, 0, 0, 0.05);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

.message-content pre {
    background-color: rgba(0, 0, 0, 0.05);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 0.5rem 0;
}

.message-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.8rem;
    opacity: 0;
    transition: var(--transition);
}

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

.message-action-btn {
    background: none;
    border: none;
    color: var(--secondary-color);
    cursor: pointer;
    font-size: 0.9rem;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    transition: var(--transition);
}

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

/* ورودی چت */
.chat-input-container {
    padding: 1.5rem 2rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--light-color);
}

.input-wrapper {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
}

.input-wrapper textarea {
    flex: 1;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--light-color);
    color: var(--dark-color);
    font-size: 1rem;
    resize: none;
    min-height: 50px;
    max-height: 150px;
    transition: var(--transition);
    line-height: 1.5;
}

.input-wrapper textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.input-controls {
    display: flex;
    gap: 0.5rem;
    align-items: flex-end;
}

.icon-btn {
    background: none;
    border: none;
    color: var(--secondary-color);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.send-btn {
    height: 50px;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.input-footer {
    display: flex;
    justify-content: space-between;
    margin-top: 0.8rem;
    font-size: 0.9rem;
}

.hint {
    color: var(--secondary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.typing-indicator {
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.typing-indicator i {
    animation: blink 1.4s infinite;
    font-size: 0.6rem;
}

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

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

@keyframes blink {
    0%, 100% { opacity: 0.2; }
    50% { opacity: 1; }
}

/* نوار وضعیت */
.status-bar {
    display: flex;
    justify-content: space-between;
    padding: 0.7rem 2rem;
    background-color: var(--dark-color);
    color: white;
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
}

.status-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-online {
    color: var(--success-color);
}

.status-offline {
    color: var(--danger-color);
}

/* دکمه‌ها */
.btn {
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

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

.btn-secondary:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

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

.btn-danger:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.btn-small {
    padding: 0.3rem 0.8rem;
    font-size: 0.8rem;
}

/* مودال */
.modal {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--light-color);
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow);
    animation: modalFadeIn 0.3s ease;
}

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

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

.modal-header h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.8rem;
    color: var(--secondary-color);
    cursor: pointer;
    transition: var(--transition);
}

.close-modal:hover {
    color: var(--danger-color);
}

.modal-body {
    padding: 1.5rem;
}

.settings-section {
    margin-bottom: 2rem;
}

.settings-section h4 {
    margin-bottom: 1rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--light-color);
    color: var(--dark-color);
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-range {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
    -webkit-appearance: none;
}

.form-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
}

.form-range::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 0.8rem;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 20px;
    left: 20px;
    background: var(--success-color);
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    z-index: 10000;
    animation: slideIn 0.3s ease;
    font-family: 'Vazirmatn', sans-serif;
    box-shadow: var(--shadow);
}

.toast-error {
    background: var(--danger-color);
}

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

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

/* اسکرول بار */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* ریسپانسیو */
@media (max-width: 1024px) {
    .sidebar {
        width: 240px;
    }
}

@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: 300px;
        border-left: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .header {
        padding: 1rem;
    }
    
    .header-controls {
        gap: 0.5rem;
    }
    
    .chat-messages {
        padding: 1rem;
    }
    
    .message {
        max-width: 95%;
    }
    
    .quick-actions {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 1.4rem;
    }
    
    .btn span:not(.fa) {
        display: none;
    }
    
    .btn {
        padding: 0.6rem;
    }
    
    .status-bar {
        padding: 0.7rem 1rem;
        font-size: 0.8rem;
    }
    
    .quick-actions {
        grid-template-columns: 1fr;
    }
}