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

:root {
    --primary-color: #2563eb;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --border-color: #475569;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

.screen {
    min-height: 100vh;
}

.hidden {
    display: none !important;
}

/* Login Screen */
.login-container {
    max-width: 400px;
    margin: 100px auto;
    padding: 40px;
    background: var(--bg-secondary);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.login-container h1 {
    text-align: center;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 14px;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background: #1d4ed8;
}

.btn-primary:disabled {
    background: var(--secondary-color);
    cursor: not-allowed;
}

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

.btn-secondary:hover {
    background: #475569;
}

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

.btn-warning:hover {
    background: #d97706;
}

.btn-warning:disabled {
    background: var(--secondary-color);
    cursor: not-allowed;
    opacity: 0.5;
}

.error-message {
    margin-top: 15px;
    padding: 12px;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger-color);
    border-radius: 6px;
    color: var(--danger-color);
    font-size: 14px;
    display: none;
}

.error-message.show {
    display: block;
}

/* Chat Screen */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header h2 {
    font-size: 18px;
    font-weight: 600;
}

.status {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.status.connected {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
}

.status.disconnected {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-color);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-info {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Main Content */
.main-content {
    display: flex;
    height: calc(100vh - 65px);
}

.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

.message {
    margin-bottom: 20px;
    animation: fadeIn 0.3s;
}

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

.message-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.message-role {
    font-weight: 600;
    font-size: 14px;
}

.message-role.user {
    color: var(--primary-color);
}

.message-role.assistant {
    color: var(--success-color);
}

.message-role.system {
    color: var(--warning-color);
}

.message-role.error {
    color: var(--danger-color);
}

.message-content {
    background: var(--bg-secondary);
    padding: 16px;
    border-radius: 8px;
    border-left: 3px solid var(--border-color);
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.6;
}

.message.user .message-content {
    border-left-color: var(--primary-color);
}

.message.assistant .message-content {
    border-left-color: var(--success-color);
}

.message.system .message-content {
    border-left-color: var(--warning-color);
}

.message.error .message-content {
    border-left-color: var(--danger-color);
}

/* Input Container */
.input-container {
    padding: 24px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    position: relative;
}

/* Autocomplete Dropdown */
.autocomplete-dropdown {
    position: absolute;
    bottom: 100%;
    left: 24px;
    right: 24px;
    margin-bottom: 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    max-height: 200px;
    overflow-y: auto;
    z-index: 1000;
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.3);
}

.autocomplete-dropdown.hidden {
    display: none;
}

.autocomplete-item {
    padding: 10px 16px;
    cursor: pointer;
    transition: background 0.2s;
    font-size: 14px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

.autocomplete-item:last-child {
    border-bottom: none;
}

.autocomplete-item:hover,
.autocomplete-item.selected {
    background: var(--primary-color);
    color: white;
}

#message-input {
    width: 100%;
    padding: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    resize: vertical;
    margin-bottom: 12px;
}

#message-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.input-actions {
    display: flex;
    gap: 12px;
}

.input-actions .btn {
    flex: 1;
}

/* Sidebar */
.sidebar {
    width: 300px;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    padding: 24px;
    overflow-y: auto;
}

.sidebar h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.working-dir {
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    font-size: 12px;
    font-family: 'Courier New', monospace;
    color: var(--text-secondary);
    margin-bottom: 24px;
    word-wrap: break-word;
}

.file-list {
    max-height: 400px;
    overflow-y: auto;
}

.file-item {
    padding: 8px 12px;
    margin-bottom: 4px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    font-size: 13px;
    cursor: pointer;
    transition: background 0.2s;
}

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

.file-item.directory {
    color: var(--primary-color);
}

.file-item.file {
    color: var(--text-secondary);
}

.loading {
    color: var(--text-secondary);
    font-size: 14px;
    text-align: center;
    padding: 20px;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

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

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

/* Mobile Responsive */
@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        border-left: none;
        border-top: 1px solid var(--border-color);
        max-height: 300px;
    }

    .header {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }

    .header-right {
        width: 100%;
        justify-content: space-between;
    }

    .input-actions {
        flex-wrap: wrap;
    }

    .input-actions .btn {
        min-width: calc(50% - 6px);
    }
}