:root {
    --bg-color: #0f172a;
    --sidebar-bg: #1e293b;
    --chat-bg: #0f172a;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --message-user-bg: #3b82f6;
    --message-ai-bg: #1e293b;
    --border-color: #334155;
    --input-bg: #1e293b;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

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

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    transition: transform 0.3s ease;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.logo i {
    color: var(--accent-color);
}

.menu-items {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.menu-item:hover,
.menu-item.active {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--accent-color);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.avatar {
    width: 36px;
    height: 36px;
    background-color: var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-info .name {
    font-size: 0.875rem;
    font-weight: 500;
}

.user-info .status {
    font-size: 0.75rem;
    color: #22c55e;
}

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

.chat-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
    background-color: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10;
}

.header-info h2 {
    font-size: 1.125rem;
    font-weight: 600;
}

.status-indicator {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.status-indicator::before {
    content: '';
    width: 6px;
    height: 6px;
    background-color: #22c55e;
    border-radius: 50%;
}

.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 6rem 2rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    scroll-behavior: smooth;
}

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

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.ai {
    align-self: flex-start;
}

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

.message-content {
    padding: 1rem 1.25rem;
    border-radius: 1rem;
    font-size: 0.9375rem;
    line-height: 1.5;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.message.ai .message-content {
    background-color: var(--message-ai-bg);
    border: 1px solid var(--border-color);
    border-top-left-radius: 4px;
}

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

.message-meta {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.375rem;
    margin-left: 0.5rem;
}

.message.user .message-meta {
    margin-right: 0.5rem;
    margin-left: 0;
}

/* Input Area */
.input-area {
    padding: 1.5rem 2rem;
    background-color: var(--chat-bg);
    border-top: 1px solid var(--border-color);
}

.input-wrapper {
    display: flex;
    gap: 0.75rem;
    background-color: var(--input-bg);
    padding: 0.75rem;
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    align-items: flex-end;
}

.input-wrapper:focus-within {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.1);
}

textarea {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 0.9375rem;
    resize: none;
    max-height: 120px;
    outline: none;
    padding: 0.25rem;
    line-height: 1.5;
}

textarea::placeholder {
    color: var(--text-secondary);
}

button {
    background-color: var(--accent-color);
    color: white;
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

button:hover {
    background-color: var(--accent-hover);
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: #475569;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -260px;
        top: 0;
        bottom: 0;
        z-index: 50;
    }

    .sidebar.active {
        left: 0;
        transform: translateX(0);
    }

    .messages-container {
        padding: 5rem 1rem 1rem;
    }

    .chat-header {
        padding: 1rem;
    }

    .input-area {
        padding: 1rem;
    }
}