:root {
    --font-primary: 'Roboto', sans-serif;
    --font-display: 'Orbitron', sans-serif;

    /* Light Theme - Modern & Clean */
    --light-bg: #eef2f7;
    --light-chat-bg: #ffffff;
    --light-header-bg: #f8f9fc;
    --light-text-primary: #2c3e50; /* Darker blue-grey */
    --light-text-secondary: #52616b; /* Softer grey */
    --light-border: #d8dde4;
    --light-user-msg-bg: #007AFF;
    --light-user-msg-text: #ffffff;
    --light-bot-msg-bg: #e9ecef;
    --light-accent: #007AFF; /* Vibrant blue */
    --light-input-bg: #f0f3f8;
    --light-modal-input-bg: #ffffff;
    --light-button-hover-bg: rgba(0, 122, 255, 0.1);
    --light-shadow-color: rgba(44, 62, 80, 0.15);
    --light-danger-bg: #e74c3c;
    --light-danger-text: #ffffff;
    --light-danger-hover-bg: #c0392b;


    /* Dark Theme - Tech & Sophisticated */
    --dark-bg: #171a23; /* Very dark blue-grey */
    --dark-chat-bg: #222733; /* Darker card background */
    --dark-header-bg: #1c202b; /* Slightly lighter than main bg for depth */
    --dark-text-primary: #e0e6f0; /* Off-white */
    --dark-text-secondary: #909db0; /* Lighter grey */
    --dark-border: #384054;
    --dark-user-msg-bg: #007bff; /* Brighter blue for contrast */
    --dark-user-msg-text: #ffffff;
    --dark-bot-msg-bg: #2c3140; /* Darker bot messages */
    --dark-accent: #00a9ff; /* Brighter, more electric blue */
    --dark-input-bg: #2a2f3d;
    --dark-modal-input-bg: #2a2f3d;
    --dark-button-hover-bg: rgba(0, 169, 255, 0.15);
    --dark-shadow-color: rgba(0, 0, 0, 0.3);
    --dark-danger-bg: #d63031;
    --dark-danger-text: #ffffff;
    --dark-danger-hover-bg: #b71540;


    --current-bg: var(--light-bg);
    --current-chat-bg: var(--light-chat-bg);
    --current-header-bg: var(--light-header-bg);
    --current-text-primary: var(--light-text-primary);
    --current-text-secondary: var(--light-text-secondary);
    --current-border: var(--light-border);
    --current-user-msg-bg: var(--light-user-msg-bg);
    --current-user-msg-text: var(--light-user-msg-text);
    --current-bot-msg-bg: var(--light-bot-msg-bg);
    --current-accent: var(--light-accent);
    --current-input-bg: var(--light-input-bg);
    --current-modal-input-bg: var(--light-modal-input-bg);
    --current-button-hover-bg: var(--light-button-hover-bg);
    --current-shadow-color: var(--light-shadow-color);
    --current-danger-bg: var(--light-danger-bg);
    --current-danger-text: var(--light-danger-text);
    --current-danger-hover-bg: var(--light-danger-hover-bg);


    --header-height: 70px;
    --input-area-height: 80px;
    --border-radius-s: 6px;
    --border-radius-m: 12px;
    --border-radius-l: 20px; /* For messages */
    --shadow-soft: 0 4px 12px var(--current-shadow-color);
    --shadow-medium: 0 8px 24px var(--current-shadow-color);
    --shadow-strong: 0 12px 30px color-mix(in srgb, var(--current-shadow-color) 150%, transparent);
    --transition-fast: 0.2s ease-in-out;
    --transition-medium: 0.3s ease-in-out;
}

body {
    font-family: var(--font-primary); margin: 0;
    background-color: var(--current-bg); color: var(--current-text-primary);
    display: flex; justify-content: center; align-items: center;
    min-height: 100vh; padding: 15px; box-sizing: border-box;
    transition: background-color var(--transition-medium), color var(--transition-medium);
}

.chat-container {
    width: 100%; max-width: 900px; height: 92vh; max-height: 950px;
    background-color: var(--current-chat-bg);
    border-radius: var(--border-radius-m);
    box-shadow: var(--shadow-medium);
    display: flex; flex-direction: column; overflow: hidden;
    border: 1px solid var(--current-border);
    transition: background-color var(--transition-medium), border-color var(--transition-medium), box-shadow var(--transition-medium);
}

.chat-header {
    background-color: var(--current-header-bg);
    color: var(--current-text-primary);
    padding: 0 25px;
    display: flex; justify-content: space-between; align-items: center;
    height: var(--header-height); flex-shrink: 0;
    border-bottom: 1px solid var(--current-border);
    transition: background-color var(--transition-medium), color var(--transition-medium), border-color var(--transition-medium);
}
.header-title-status { display: flex; align-items: center; }
.chat-header h1 {
    font-family: var(--font-display); font-size: 1.6rem; font-weight: 500; margin: 0; margin-right: 15px;
    color: var(--current-accent);
    text-shadow: 0 0 8px color-mix(in srgb, var(--current-accent) 20%, transparent);
    transition: color var(--transition-medium), text-shadow var(--transition-medium);
}
#api-status-indicator {
    width: 14px; height: 14px; border-radius: 50%;
    transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
    margin-top: 3px;
    box-shadow: 0 0 6px rgba(0,0,0,0.2);
}
.api-status-active { background-color: #2ecc71; animation: pulseActive 2s infinite; }
.api-status-inactive { background-color: #e74c3c; }
@keyframes pulseActive {
    0% { box-shadow: 0 0 7px #2ecc71, 0 0 3px #2ecc71 inset; }
    50% { box-shadow: 0 0 12px #2ecc71, 0 0 5px #2ecc71 inset; }
    100% { box-shadow: 0 0 7px #2ecc71, 0 0 3px #2ecc71 inset; }
}

.header-buttons { display: flex; align-items: center; }
.header-buttons button {
    background: transparent; border: none; color: var(--current-text-secondary);
    cursor: pointer; padding: 10px; margin-left: 8px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
    position: relative; /* For potential tooltips if not using title */
}
.header-buttons button:hover {
    background-color: var(--current-button-hover-bg);
    color: var(--current-accent);
    transform: scale(1.1);
}
.header-buttons button:active { transform: scale(0.95); }
.header-buttons button svg { width: 24px; height: 24px; fill: currentColor; transition: fill var(--transition-fast); }
.header-buttons button .button-text-label { /* Initially hidden text for hover */
    display: none;
    position: absolute;
    bottom: -25px; /* Position below the button */
    left: 50%;
    transform: translateX(-50%);
    background-color: color-mix(in srgb, var(--current-header-bg) 90%, black);
    color: var(--current-text-primary);
    padding: 4px 8px;
    border-radius: var(--border-radius-s);
    font-size: 0.75rem;
    white-space: nowrap;
    box-shadow: var(--shadow-soft);
    z-index: 10;
    opacity: 0;
    transition: opacity var(--transition-fast), bottom var(--transition-fast);
}
.header-buttons button:hover .button-text-label {
    display: block;
    opacity: 1;
    bottom: -30px; /* Move slightly down on hover */
}


.chat-messages {
    flex-grow: 1; padding: 25px; overflow-y: auto; display: flex; flex-direction: column;
    scrollbar-width: thin; scrollbar-color: var(--current-text-secondary) transparent;
}
.chat-messages::-webkit-scrollbar { width: 8px; }
.chat-messages::-webkit-scrollbar-thumb { background-color: var(--current-accent); border-radius: 4px; border: 2px solid transparent; background-clip: content-box;}
.chat-messages::-webkit-scrollbar-track { background-color: transparent; }

.message-wrapper {
    display: flex; flex-direction: column; margin-bottom: 18px; max-width: 85%;
    opacity: 0; transform: translateY(15px);
    animation: messageSlideInFade 0.4s var(--transition-medium) forwards;
}
@keyframes messageSlideInFade {
    to { opacity: 1; transform: translateY(0); }
}
.message-wrapper.user-message-wrapper { align-self: flex-end; animation-delay: 0.1s; } /* Slight delay for user sending */
.message-wrapper.bot-message-wrapper { align-self: flex-start; }

.message {
    padding: 14px 20px; border-radius: var(--border-radius-l);
    line-height: 1.65; font-size: 0.98rem; word-wrap: break-word; position: relative;
    transition: background-color var(--transition-medium), color var(--transition-medium);
    box-shadow: var(--shadow-soft);
}
.message-actions {
    display: flex; gap: 10px; padding: 8px 0 0 14px; opacity: 0;
    transition: opacity var(--transition-fast), transform var(--transition-fast), height var(--transition-fast);
    height: 0; overflow: hidden; align-items: center; transform: translateY(-8px);
}
.message-wrapper:hover .message-actions { opacity: 1; height: auto; transform: translateY(0); }
.bot-message-wrapper .message-actions { justify-content: flex-start; }
.user-message-wrapper .message-actions { justify-content: flex-end; padding-right: 14px; padding-left: 0;}
.action-btn {
    background: none; border: none; cursor: pointer; padding: 5px; opacity: 0.7;
    display: flex; align-items: center; justify-content: center;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}
.action-btn:hover { opacity: 1; transform: scale(1.15); }
.action-btn svg { width: 20px; height: 20px; fill: var(--current-text-secondary); transition: fill var(--transition-fast); }
.action-btn:hover svg { fill: var(--current-accent); }
.copied-feedback { color: var(--current-accent); font-size: 0.8rem; font-style: italic; margin-left: 6px; animation: fadeInOut 1.5s ease-in-out; }
@keyframes fadeInOut { 0%, 100% { opacity: 0; } 20%, 80% { opacity: 1; } }

.message strong { font-weight: 600; color: var(--current-accent); }
.message code { background-color: color-mix(in srgb, var(--current-bot-msg-bg) 80%, var(--current-text-primary) 15%) ; padding: 0.25em 0.5em; border-radius: var(--border-radius-s); font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace; font-size: 0.9em; color: var(--current-text-primary); border: 1px solid var(--current-border); margin: 0 2px;}
.message pre { background-color: color-mix(in srgb, var(--current-bg) 90%, black 10%); color: var(--current-text-primary); padding: 15px; border-radius: var(--border-radius-m); overflow-x: auto; font-size: 0.9em; border: 1px solid var(--current-border); box-shadow: inset 0 2px 5px rgba(0,0,0,0.08); margin: 8px 0; }
.message pre code { background-color: transparent; border: none; padding: 0; margin: 0; }
.user-message { background-color: var(--current-user-msg-bg); color: var(--current-user-msg-text); border-bottom-right-radius: var(--border-radius-s); }
.bot-message { background-color: var(--current-bot-msg-bg); color: var(--current-text-primary); border-bottom-left-radius: var(--border-radius-s); }
.bot-message.thinking .typing-indicator span { display: inline-block; width: 9px; height: 9px; border-radius: 50%; background-color: var(--current-text-secondary); margin: 0 3px; animation: blink 1.4s infinite both; }
.bot-message.thinking .typing-indicator span:nth-child(2) { animation-delay: .2s; }
.bot-message.thinking .typing-indicator span:nth-child(3) { animation-delay: .4s; }
@keyframes blink { 0%, 80%, 100% { opacity: 0.3; transform: scale(0.8); } 40% { opacity: 1; transform: scale(1); } }
.sentiment-icon { margin-left: 10px; font-size: 0.85em; display: inline-block; animation: popIn 0.4s ease-out; }
@keyframes popIn { 0% { transform: scale(0.3); opacity: 0;} 100% {transform: scale(1); opacity: 1;} }

.advanced-features-panel {
    padding: 15px 25px; border-top: 1px solid var(--current-border);
    background-color: var(--current-header-bg);
    display: flex; gap: 12px; align-items: center; flex-wrap: wrap;
    transition: background-color var(--transition-medium), border-color var(--transition-medium);
}
.advanced-features-panel .adv-feature-btn, .advanced-features-panel select {
    padding: 8px 12px; font-size: 0.9rem;
    background-color: var(--current-input-bg); color: var(--current-text-secondary);
    border: 1px solid var(--current-border); border-radius: var(--border-radius-m);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-soft);
    display: flex; align-items: center;
    min-width: 45px;
}
.advanced-features-panel .adv-feature-btn:hover, .advanced-features-panel select:hover {
    background-color: var(--current-chat-bg);
    border-color: var(--current-accent);
    color: var(--current-accent);
    box-shadow: 0 4px 10px color-mix(in srgb, var(--current-accent) 15%, transparent);
    transform: translateY(-2px);
}
.advanced-features-panel .adv-feature-btn svg {
    width: 20px; height: 20px; fill: currentColor; margin-right: 0;
    transition: margin-right var(--transition-fast);
}
.advanced-features-panel .adv-feature-btn .button-text-label {
    font-size: 0.85rem;
    margin-left: 0;
    max-width: 0;
    overflow: hidden;
    white-space: nowrap;
    opacity: 0;
    transition: max-width var(--transition-fast), margin-left var(--transition-fast), opacity var(--transition-fast);
}
.advanced-features-panel .adv-feature-btn:hover svg {
     margin-right: 8px;
}
.advanced-features-panel .adv-feature-btn:hover .button-text-label {
    margin-left: 0px;
    max-width: 150px;
    opacity: 1;
}
.advanced-features-panel select {
    appearance: none; -webkit-appearance: none;
    padding-right: 30px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='currentColor'%3E%3Cpath d='M7 10l5 5 5-5H7z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 18px;
    color: var(--current-text-secondary);
}
.advanced-features-panel select:hover {
    color: var(--current-accent);
}


.chat-input-area {
    display: flex; align-items: center; padding: 15px 25px;
    border-top: 1px solid var(--current-border);
    background-color: var(--current-chat-bg);
    height: var(--input-area-height); flex-shrink: 0;
    transition: background-color var(--transition-medium), border-color var(--transition-medium);
}
#user-input {
    flex-grow: 1; padding: 16px 22px;
    border: 1px solid var(--current-border);
    border-radius: var(--border-radius-l); font-size: 1rem; margin-right: 10px; /* Adjusted margin */
    outline: none;
    background-color: var(--current-input-bg); color: var(--current-text-primary);
    transition: background-color var(--transition-medium), color var(--transition-medium), border-color var(--transition-fast), box-shadow var(--transition-fast);
}
#user-input:focus {
    border-color: var(--current-accent);
    background-color: var(--current-chat-bg);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--current-accent) 20%, transparent);
}
#user-input:disabled { background-color: color-mix(in srgb, var(--current-input-bg) 70%, #88888855); cursor: not-allowed; opacity: 0.7; }

/* Save Chat Button - Specific styles */
#save-chat-btn {
    background-color: transparent;
    color: var(--current-text-secondary);
    border: 1px solid var(--current-border);
    border-radius: 50%;
    width: 50px; /* Slightly smaller than send */
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
    margin-right: 10px;
    padding: 0; /* Remove default button padding if any */
}
#save-chat-btn:hover {
    background-color: var(--current-button-hover-bg);
    color: var(--current-accent);
    border-color: var(--current-accent);
    transform: scale(1.05);
}
#save-chat-btn svg {
    width: 22px;
    height: 22px;
    fill: currentColor;
}


#send-button {
    background-color: var(--current-accent); color: var(--current-user-msg-text);
    border: none; border-radius: 50%; width: 55px; height: 55px;
    display: flex; justify-content: center; align-items: center; cursor: pointer;
    transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
    flex-shrink: 0; box-shadow: 0 3px 8px color-mix(in srgb, var(--current-accent) 30%, transparent);
}
#send-button:hover {
    background-color: color-mix(in srgb, var(--current-accent) 80%, black);
    transform: scale(1.08) translateY(-2px);
    box-shadow: 0 5px 12px color-mix(in srgb, var(--current-accent) 40%, transparent);
}
#send-button:active { transform: scale(0.98); box-shadow: 0 2px 5px color-mix(in srgb, var(--current-accent) 25%, transparent); }
#send-button:disabled { background-color: var(--current-text-secondary); cursor: not-allowed; opacity: 0.6; transform: scale(1); box-shadow: none;}
#send-button svg { width:26px; height:26px; margin-left: 3px; fill: var(--current-user-msg-text); }

.modal {
    display: none; position: fixed; z-index: 1000; left: 0; top: 0; width: 100%; height: 100%;
    overflow: auto; background-color: rgba(0,0,0,0.7); /* Darker backdrop */
    justify-content: center; align-items: center;
    transition: opacity var(--transition-medium); opacity: 0;
}
.modal.show { display: flex; opacity: 1; }
.modal-content {
    background-color: var(--current-chat-bg); color: var(--current-text-primary);
    margin: auto; padding: 30px 35px; border: 1px solid var(--current-border);
    border-radius: var(--border-radius-m); width: 90%; max-width: 550px;
    box-shadow: var(--shadow-strong);
    position: relative;
    transition: background-color var(--transition-medium), color var(--transition-medium), border-color var(--transition-medium), transform var(--transition-medium);
    transform: scale(0.92) translateY(10px); opacity: 0;
}
.modal.show .modal-content { transform: scale(1) translateY(0); opacity: 1; }
.close-btn {
    color: var(--current-text-secondary); position: absolute; top: 15px; right: 20px;
    font-size: 30px; font-weight: bold; transition: color var(--transition-fast), transform var(--transition-fast);
}
.close-btn:hover, .close-btn:focus { color: var(--current-accent); text-decoration: none; cursor: pointer; transform: rotate(90deg); }
.modal h2 { margin-top: 0; margin-bottom: 25px; font-weight: 500; color: var(--current-text-primary); font-family: var(--font-display); }
.modal label { display: block; margin-bottom: 10px; font-weight: 500; font-size: 0.95rem; color: var(--current-text-secondary); }
.modal input[type="password"], .modal input[type="text"], .modal textarea {
    width: calc(100% - 26px); padding: 14px; margin-bottom: 12px;
    border: 1px solid var(--current-border); border-radius: var(--border-radius-m); font-size: 1rem;
    background-color: var(--current-modal-input-bg); color: var(--current-text-primary);
    transition: border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}
.modal input[type="password"]:focus, .modal input[type="text"]:focus, .modal textarea:focus {
    border-color: var(--current-accent);
    background-color: var(--current-chat-bg); outline: none;
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--current-accent) 20%, transparent);
}
.modal textarea { resize: vertical; min-height: 70px; font-family: var(--font-primary); }
.api-key-notice { font-size: 0.85rem; color: var(--current-text-secondary); margin-bottom: 25px; line-height: 1.5; }
.modal-actions { display: flex; justify-content: flex-end; gap: 12px; margin-top: 20px; }
.modal-actions button {
    padding: 12px 22px; border-radius: var(--border-radius-m); border: none;
    cursor: pointer; font-weight: 500;
    transition: background-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
    box-shadow: var(--shadow-soft);
}
.modal-actions button:hover { transform: translateY(-2px); }
#save-api-key-btn, #add-prompt-btn { background-color: var(--current-accent); color: var(--current-user-msg-text); }
#save-api-key-btn:hover, #add-prompt-btn:hover { background-color: color-mix(in srgb, var(--current-accent) 85%, black); box-shadow: 0 3px 10px color-mix(in srgb, var(--current-accent) 30%, transparent); }
#clear-api-key-btn { background-color: var(--current-input-bg); color: var(--current-text-primary); border: 1px solid var(--current-border); }
#clear-api-key-btn:hover { background-color: color-mix(in srgb, var(--current-text-secondary) 15%, var(--current-input-bg)); }

#prompts-list-container { max-height: 220px; overflow-y: auto; margin-bottom: 20px; border: 1px solid var(--current-border); border-radius: var(--border-radius-m); padding: 12px; background-color: var(--current-input-bg); }
#prompts-list p { margin: 0; padding: 12px;}
.prompt-item { padding: 12px; border-bottom: 1px solid var(--current-border); display: flex; justify-content: space-between; align-items: center; transition: background-color var(--transition-fast); }
.prompt-item:hover { background-color: color-mix(in srgb, var(--current-modal-input-bg) 80%, var(--current-accent) 5%); }
.prompt-item:last-child { border-bottom: none; }
.prompt-item-text-content strong { display: block; margin-bottom: 5px; color: var(--current-text-primary); }
.prompt-item-text-content span { font-size: 0.9em; color: var(--current-text-secondary); }
.prompt-delete-btn { background: none; border: none; cursor: pointer; padding: 6px;}
.prompt-delete-btn svg { width: 20px; height: 20px; fill: var(--current-text-secondary); transition: fill var(--transition-fast), transform var(--transition-fast); }
.prompt-delete-btn:hover svg { fill: #e74c3c; transform: scale(1.1); }

/* System / Bot Info Messages */
.bot-info-message, .system-notification-message {
    background-color: color-mix(in srgb, var(--current-accent) 10%, var(--current-chat-bg));
    color: var(--current-text-primary);
    border: 1px solid color-mix(in srgb, var(--current-accent) 30%, transparent);
    font-size: 0.88em; text-align: center;
    max-width: 90%; padding: 10px 15px; margin: 12px auto;
    border-radius: var(--border-radius-m);
    box-shadow: var(--shadow-soft);
    animation: messageSlideInFade 0.4s var(--transition-medium) forwards; /* Use same animation */
}

/* Chat History Modal Styles */
#chat-history-list-container {
    max-height: 400px; /* Adjust as needed */
    overflow-y: auto;
    margin-bottom: 20px;
    border: 1px solid var(--current-border);
    border-radius: var(--border-radius-m);
    padding: 10px;
    background-color: var(--current-input-bg);
}
.chat-history-item {
    padding: 12px 15px;
    border-bottom: 1px solid var(--current-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}
.chat-history-item:hover {
    background-color: color-mix(in srgb, var(--current-modal-input-bg) 80%, var(--current-accent) 10%);
}
.chat-history-item:last-child {
    border-bottom: none;
}
.chat-history-item-info {
    display: flex;
    flex-direction: column;
}
.chat-history-item-title {
    font-weight: 500;
    color: var(--current-text-primary);
    margin-bottom: 4px;
    word-break: break-all; /* Prevent long titles from breaking layout */
}
.chat-history-item-timestamp {
    font-size: 0.8em;
    color: var(--current-text-secondary);
}
.chat-history-item-actions button {
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    margin-left: 8px;
    opacity: 0.7;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}
.chat-history-item-actions button:hover {
    opacity: 1;
    transform: scale(1.1);
}
.chat-history-item-actions button svg {
    width: 18px;
    height: 18px;
    fill: var(--current-text-secondary);
}
.chat-history-item-actions button.delete-hist-btn:hover svg {
    fill: var(--current-danger-bg);
}
.danger-btn {
    background-color: var(--current-danger-bg) !important;
    color: var(--current-danger-text) !important;
    border: 1px solid transparent !important;
}
.danger-btn:hover {
    background-color: var(--current-danger-hover-bg) !important;
    box-shadow: 0 3px 10px color-mix(in srgb, var(--current-danger-bg) 30%, transparent) !important;
}



@media (max-width: 900px) { .chat-container { max-width: 98%; height: 95vh; max-height: none; } }
@media (max-width: 768px) {
    body { padding: 0; }
    .chat-container { max-width: 100%; height: 100vh; max-height: 100vh; border-radius:0; border:none; }
    .advanced-features-panel { justify-content: space-evenly; padding: 12px 15px; gap: 8px;}
    .advanced-features-panel .adv-feature-btn, .advanced-features-panel select { flex-basis: calc(50% - 8px); margin-bottom: 8px; text-align: center; justify-content: center; font-size: 0.85rem; padding: 8px 10px;}
    .advanced-features-panel .adv-feature-btn svg { margin-right: 0 !important; }
    .advanced-features-panel .adv-feature-btn .button-text-label { display: none !important; }
    .modal-content { width: 95%; padding: 25px 20px; }
    .chat-header { padding: 0 15px; }
    .chat-messages { padding: 15px; }
    .chat-input-area { padding: 10px 15px; }
    #user-input { padding: 14px 18px; margin-right: 8px;}
    #save-chat-btn { width: 45px; height: 45px; margin-right: 8px;}
    #send-button { width: 50px; height: 50px;}
}
@media (max-width: 480px) {
    .chat-header h1 { font-size: 1.3rem; margin-right: 10px;}
    .header-buttons button { padding: 8px; margin-left: 5px; }
    .header-buttons button svg { width: 20px; height: 20px; }
    #user-input { padding: 12px 15px; font-size: 0.95rem; margin-right: 8px;}
    #save-chat-btn { width: 42px; height: 42px; margin-right: 8px;}
    #send-button { width: 45px; height: 45px; }
    .advanced-features-panel .adv-feature-btn, .advanced-features-panel select { flex-basis: 100%; }
    .message { padding: 12px 16px; font-size: 0.92rem; }
}