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

:root {
    --primary-color: #00ff99;
    --primary-dark: #00cc7a;
    --secondary-color: #ff00ee;
    --bg-color: #121212;
    --text-color: #ffffff;
    --chat-user-bg: #2a2a2a;
    --chat-bot-bg: #1a1a1a;
}

body {
    font-family: 'Vazirmatn', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    direction: rtl;
}

.app-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
    flex-wrap: wrap; 
    gap: 10px; 
}

h1 {
    color: var(--primary-color);
    text-shadow: 0 0 10px rgba(0, 255, 153, 0.5);
    flex-shrink: 0; 
}

nav {
    display: flex;
    align-items: center; 
    gap: 10px;
    flex-wrap: wrap; 
}

.lang-switcher {
    display: flex;
    gap: 5px;
    margin-left: 15px; 
}

.lang-btn {
    background: none;
    border: 1px solid var(--text-color);
    color: var(--text-color);
    padding: 4px 8px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8em;
    transition: all 0.3s;
}

.lang-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.lang-btn.active {
    background-color: var(--text-color);
    color: var(--bg-color);
    font-weight: bold;
}

.tab-btn {
    background: none;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-family: 'Vazirmatn', Arial, sans-serif;
    font-weight: bold;
    transition: all 0.3s;
}

.tab-btn:hover {
    background-color: rgba(0, 255, 153, 0.1);
    box-shadow: 0 0 10px rgba(0, 255, 153, 0.3);
}

.tab-btn.active {
    background-color: var(--primary-color);
    color: var(--bg-color);
}

main {
    flex: 1;
    overflow: hidden;
}

.tab-content {
    display: none;
    height: 100%;
}

.tab-content.active {
    display: block;
}

.chat-container {
    display: flex;
    flex-direction: column;
    height: calc(100% - 40px); 
}

.chat-header {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-bottom: 10px;
}

.chat-action-btn {
    background: none;
    border: 1px solid var(--secondary-color);
    color: var(--secondary-color);
    padding: 5px 10px;
    border-radius: 5px;
    cursor: pointer;
    font-family: 'Vazirmatn', Arial, sans-serif;
    font-size: 0.9em;
    transition: all 0.3s;
}

.chat-action-btn:hover {
    background-color: rgba(255, 0, 238, 0.1);
    box-shadow: 0 0 8px rgba(255, 0, 238, 0.3);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 15px;
    border: 1px solid rgba(0, 255, 153, 0.3);
    border-radius: 8px;
    background-color: transparent;
}

.message {
    padding: 12px;
    border-radius: 8px;
    max-width: 80%;
    animation: fadeIn 0.3s ease-in-out;
    position: relative; 
}

.message p { 
    white-space: pre-wrap;
    word-wrap: break-word;
    margin-bottom: 25px; 
}

.message.user {
    align-self: flex-end;
    background-color: var(--chat-user-bg);
    border-right: 3px solid var(--primary-color);
}

.message.bot {
    align-self: flex-start;
    background-color: var(--chat-bot-bg);
    border-right: 3px solid var(--secondary-color);
}

.message-actions {
    position: absolute;
    bottom: 5px;
    left: 8px; 
    display: flex;
    gap: 8px;
    opacity: 0; 
    transition: opacity 0.2s ease-in-out;
}

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

.message-action-btn {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: var(--text-color);
    padding: 3px 6px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8em;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: background-color 0.2s;
}

.message-action-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.message-action-btn i {
    font-size: 0.9em;
}

[dir="rtl"] .message-actions {
    left: auto;
    right: 8px;
}

.message.user p {
     margin-bottom: 5px; 
}

.chat-input-container {
    display: flex;
    gap: 10px;
}

#user-input {
    flex: 1;
    padding: 12px;
    border-radius: 8px;
    border: 2px solid var(--primary-color);
    background-color: rgba(0, 255, 153, 0.1);
    color: var(--text-color);
    font-family: 'Vazirmatn', Arial, sans-serif;
    resize: none;
    height: 60px;
}

#send-btn {
    background-color: var(--primary-color);
    color: var(--bg-color);
    border: none;
    border-radius: 8px;
    padding: 0 20px;
    cursor: pointer;
    font-family: 'Vazirmatn', Arial, sans-serif;
    font-weight: bold;
    transition: all 0.3s;
}

#send-btn:hover {
    background-color: var(--primary-dark);
    box-shadow: 0 0 15px rgba(0, 255, 153, 0.5);
}

.settings-container {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    height: 100%;
    overflow-y: auto;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.setting-group label {
    font-weight: bold;
    color: var(--primary-color);
}

.setting-group input, .setting-group select {
    padding: 12px;
    border-radius: 8px;
    border: 2px solid var(--primary-color);
    background-color: rgba(0, 255, 153, 0.05); 
    color: var(--text-color);
    font-family: 'Vazirmatn', Arial, sans-serif;
}

.setting-group small {
    color: rgba(255, 255, 255, 0.7);
}

.setting-group a {
    color: var(--primary-color);
    text-decoration: none;
}

.model-selection {
    display: flex;
    gap: 10px;
}

#ai-model {
    flex: 1;
}

#ai-model option {
    background-color: var(--bg-color);
    color: var(--text-color);
}

#refresh-models, #save-settings {
    background-color: var(--primary-color);
    color: var(--bg-color);
    border: none;
    border-radius: 8px;
    padding: 10px 15px;
    cursor: pointer;
    font-family: 'Vazirmatn', Arial, sans-serif;
    font-weight: bold;
    transition: all 0.3s;
}

#refresh-models:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

#refresh-models:hover, #save-settings:hover {
    background-color: var(--primary-dark);
    box-shadow: 0 0 15px rgba(0, 255, 153, 0.5);
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--bg-color);
    border: none;
    border-radius: 8px;
    padding: 12px 20px;
    cursor: pointer;
    font-family: 'Vazirmatn', Arial, sans-serif;
    font-weight: bold;
    align-self: flex-start;
}

.error-message {
    color: #ff4d4d;
    font-size: 0.9em;
    margin-top: 5px;
}

.status-message {
    color: var(--primary-color);
    font-size: 0.9em;
    margin-top: 5px;
    min-height: 1.2em; 
}

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

@media (max-width: 600px) {
    header {
        flex-direction: column;
        align-items: flex-start;
    }

    nav {
        width: 100%;
        justify-content: space-between; 
    }

    .lang-switcher {
        margin-left: 0;
    }

    .chat-input-container {
        flex-direction: column;
        gap: 5px;
    }

    #user-input {
        height: 80px; 
    }

    #send-btn {
        padding: 12px 0; 
    }

    .message {
        max-width: 90%; 
    }
}