:root {
    --bg-dark: #121212;
    --bg-surface: #1e1e1e;
    --bg-glass: rgba(30, 30, 30, 0.7);
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent-color: #6c5ce7;
    --accent-hover: #5b4bc4;
    --danger-color: #ff7675;
    --border-color: rgba(255, 255, 255, 0.1);
    --bot-msg-bg: #2d2d2d;
    --user-msg-bg: #6c5ce7;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

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

/* Sidebar */
.sidebar {
    width: 300px;
    background-color: var(--bg-surface);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 20px;
    transition: all 0.3s ease;
}

.sidebar-header {
    margin-bottom: 30px;
}

.sidebar-header h2 {
    font-weight: 600;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--accent-color);
}

.settings-section, .file-manager {
    margin-bottom: 30px;
}

.settings-section h3, .file-manager h3 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.input-group {
    margin-bottom: 15px;
}

.input-group label {
    display: block;
    font-size: 0.85rem;
    margin-bottom: 5px;
    color: var(--text-secondary);
}

select, input[type="password"], input[type="text"] {
    width: 100%;
    padding: 10px;
    border-radius: 8px;
    background-color: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    outline: none;
    transition: border-color 0.2s;
}

select:focus, input:focus {
    border-color: var(--accent-color);
}

.btn {
    padding: 10px 15px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    font-family: 'Inter', sans-serif;
    transition: background-color 0.2s, transform 0.1s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    justify-content: center;
}

.btn:active {
    transform: scale(0.98);
}

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

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

.btn-secondary {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    width: 100%;
    margin-top: 10px;
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.upload-btn {
    display: block;
    width: 100%;
    padding: 12px;
    background-color: rgba(108, 92, 231, 0.1);
    border: 1px dashed var(--accent-color);
    color: var(--accent-color);
    text-align: center;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.upload-btn:hover {
    background-color: rgba(108, 92, 231, 0.2);
}

.file-list {
    margin-top: 15px;
    overflow-y: auto;
    max-height: 250px;
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    background-color: var(--bg-dark);
    border-radius: 8px;
    margin-bottom: 8px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
}

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

.file-item.active {
    border-color: var(--accent-color);
    background-color: rgba(108, 92, 231, 0.05);
}

.file-name {
    font-size: 0.85rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 160px;
}

.file-actions {
    display: flex;
    gap: 5px;
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    padding: 5px;
    border-radius: 4px;
    transition: all 0.2s;
}

.icon-btn:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.1);
}

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

/* Chat Area */
.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    background-color: var(--bg-dark);
}

.chat-header {
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-glass);
    backdrop-filter: blur(10px);
    z-index: 10;
}

.active-file {
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.chat-history {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    scroll-behavior: smooth;
}

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

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

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

.message.user .message-content {
    background-color: var(--user-msg-bg);
    color: white;
    border-radius: 18px 18px 4px 18px;
}

.message.system .message-content {
    background-color: var(--bot-msg-bg);
    border-radius: 18px 18px 18px 4px;
    border: 1px solid var(--border-color);
}

.message-content {
    padding: 12px 18px;
    line-height: 1.5;
    font-size: 0.95rem;
}

.message-content p {
    margin-bottom: 10px;
}

.message-content p:last-child {
    margin-bottom: 0;
}

.message-content pre {
    background-color: #0d0d0d;
    padding: 10px;
    border-radius: 6px;
    overflow-x: auto;
    margin: 10px 0;
}

.message-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 10px 0;
}

.message-content th, .message-content td {
    border: 1px solid var(--border-color);
    padding: 8px;
    text-align: left;
}

.chat-input-area {
    padding: 20px;
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-color);
}

#chat-form {
    display: flex;
    gap: 10px;
    max-width: 800px;
    margin: 0 auto;
}

#chat-input {
    flex: 1;
    padding: 15px 20px;
    border-radius: 25px;
    background-color: var(--bg-dark);
    font-size: 1rem;
}

.send-btn {
    border-radius: 50%;
    width: 50px;
    height: 50px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Loading animation */
.typing-indicator {
    display: flex;
    gap: 5px;
    padding: 15px 18px;
    background-color: var(--bot-msg-bg);
    border-radius: 18px 18px 18px 4px;
    width: fit-content;
}

.dot {
    width: 8px;
    height: 8px;
    background-color: var(--text-secondary);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out both;
}

.dot:nth-child(1) { animation-delay: -0.32s; }
.dot:nth-child(2) { animation-delay: -0.16s; }

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

/* Checkbox */
.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.checkbox-group input {
    width: auto;
    accent-color: var(--accent-color);
}

/* Context Menu */
.context-menu {
    position: absolute;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
    padding: 5px 0;
    min-width: 150px;
    z-index: 1000;
    display: none;
}

.context-menu ul {
    list-style: none;
}

.context-menu li {
    padding: 10px 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    transition: background-color 0.2s;
}

.context-menu li:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.context-menu li.danger {
    color: var(--danger-color);
}

.context-menu li.danger:hover {
    background-color: rgba(255, 118, 117, 0.1);
}

/* Recorder Section */
.recorder-section {
    margin-top: 10px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.recorder-section h3 {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.recorder-hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.4;
}

.record-btn {
    width: 100%;
    transition: background-color 0.3s;
}

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

.record-status {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 15px;
    font-size: 0.85rem;
    color: var(--danger-color);
    font-weight: 500;
}

.pulse-ring {
    width: 12px;
    height: 12px;
    background-color: var(--danger-color);
    border-radius: 50%;
    position: relative;
}

.pulse-ring::after {
    content: '';
    position: absolute;
    top: -4px;
    left: -4px;
    right: -4px;
    bottom: -4px;
    border-radius: 50%;
    border: 2px solid var(--danger-color);
    animation: pulse 1.5s linear infinite;
    opacity: 0;
}

@keyframes pulse {
    0% { transform: scale(0.5); opacity: 1; }
    100% { transform: scale(1.5); opacity: 0; }
}

/* Upload Modal */
.upload-modal {
    display: none; /* Hidden by default */
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(8px);
}

.upload-modal.active {
    display: flex;
}

.upload-modal-content {
    background-color: var(--bg-surface);
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
    max-width: 450px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.8);
    border: 1px solid var(--border-color);
}

.upload-modal-content h3 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-size: 1.2rem;
}

.upload-modal-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

.upload-modal-content strong {
    color: var(--danger-color);
}

.upload-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    margin: 0 auto;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}