:root {
    --bg-color: #343541;
    --sidebar-bg: #202123;
    --chat-bg: #343541;
    --card-bg: #444654;
    --text-primary: #ececf1;
    --text-secondary: #c5c5d2;
    --border-color: #4d4d4f;
    --input-bg: #40414f;
    --accent-color: #10a37f; /* OpenAI Green-ish */
    --accent-hover: #1a7f64;
    --user-msg-bg: #343541;
    --ai-msg-bg: #444654;
    --infonix-neon: #00ff88; /* Neon green for Bhindi/Infonix vibe */
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Söhne', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

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

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

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    padding: 0.8rem;
    transition: transform 0.3s ease;
    z-index: 100;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    padding: 0.5rem;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.logo-img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid var(--infonix-neon);
    padding: 2px;
}

.logo-text {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.new-chat-btn {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.8rem;
    border-radius: 0.3rem;
    cursor: pointer;
    transition: background-color 0.2s;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.new-chat-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.nav-section h3 {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    padding-left: 0.5rem;
    text-transform: uppercase;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    color: var(--text-primary);
    text-decoration: none;
    padding: 0.8rem;
    border-radius: 0.3rem;
    transition: background-color 0.2s;
    font-size: 0.9rem;
}

.nav-item:hover, .nav-item.active {
    background-color: #2A2B32;
}

.nav-item i {
    width: 20px;
    text-align: center;
}

.sidebar-footer {
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.5rem;
    cursor: pointer;
    border-radius: 0.3rem;
}

.user-profile:hover {
    background-color: #2A2B32;
}

.user-avatar {
    width: 32px;
    height: 32px;
    background-color: var(--infonix-neon);
    color: #000;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.user-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.user-status {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    background-color: var(--bg-color);
}

.top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    /* border-bottom: 1px solid var(--border-color); */
    height: 50px;
}

.model-selector {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.5rem;
}

.model-selector:hover {
    background-color: #2A2B32;
}

.chat-container {
    flex: 1;
    overflow-y: auto;
    padding-bottom: 150px;
    scroll-behavior: smooth;
}

.message {
    padding: 1.5rem;
    display: flex;
    gap: 1.5rem;
    border-bottom: 1px solid rgba(0,0,0,0.1);
    max-width: 100%;
}

.message.ai-message {
    background-color: var(--ai-msg-bg);
    justify-content: flex-start;
}

.message.user-message {
    background-color: var(--user-msg-bg);
    flex-direction: row-reverse;
    justify-content: flex-start;
}

.message.user-message .message-content {
    text-align: right;
}

.message .avatar {
    width: 30px;
    height: 30px;
    flex-shrink: 0;
    border-radius: 2px;
    overflow: hidden;
}

.message.ai-message .avatar img {
    width: 100%;
    height: 100%;
    background-color: var(--infonix-neon);
    padding: 2px;
}

.message.user-message .avatar {
    background-color: #5436DA;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.8rem;
}

.message-content {
    flex: 1;
    max-width: 800px;
    line-height: 1.6;
    font-size: 1rem;
}

.message-content p {
    margin-bottom: 1rem;
}

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

.welcome-message {
    flex-direction: column;
    align-items: center;
    text-align: center;
    background-color: transparent !important;
    border-bottom: none;
    margin-top: 5vh;
}

.welcome-message .avatar {
    width: 80px;
    height: 80px;
    margin-bottom: 1rem;
    border-radius: 50%;
    border: 3px solid var(--infonix-neon);
    padding: 5px;
}

.welcome-message h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.capabilities {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.capability-card {
    background-color: var(--input-bg);
    padding: 1rem;
    border-radius: 0.5rem;
    width: 160px;
    text-align: center;
    transition: transform 0.2s;
}

.capability-card:hover {
    background-color: #4f5163;
}

.capability-card i {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--infonix-neon);
}

.capability-card h3 {
    font-size: 1rem;
    margin-bottom: 0.3rem;
}

.capability-card p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Input Area */
.input-area {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background-image: linear-gradient(180deg, rgba(53,53,65,0), #353541 50%);
    padding: 2rem 1rem 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.input-container {
    width: 100%;
    max-width: 768px;
    background-color: var(--input-bg);
    border-radius: 0.75rem;
    padding: 0.8rem 1rem;
    display: flex;
    align-items: flex-end;
    gap: 0.8rem;
    box-shadow: 0 0 15px rgba(0,0,0,0.1);
    border: 1px solid rgba(255,255,255,0.1);
}

.input-container:focus-within {
    border-color: rgba(255,255,255,0.3);
}

textarea {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    resize: none;
    font-size: 1rem;
    max-height: 200px;
    outline: none;
    padding: 0;
    line-height: 1.5;
}

.attach-btn, .send-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.3rem;
    border-radius: 0.3rem;
    transition: all 0.2s;
}

.attach-btn:hover {
    color: var(--text-primary);
}

.send-btn {
    background-color: var(--infonix-neon);
    color: #000;
}

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

.send-btn:not(:disabled):hover {
    opacity: 0.9;
}

.disclaimer {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.8rem;
    text-align: center;
}

/* Mobile Responsive */
.mobile-only {
    display: none;
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        height: 100%;
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .mobile-only {
        display: block;
        background: transparent;
        border: none;
        color: var(--text-primary);
        font-size: 1.2rem;
        cursor: pointer;
    }
    
    .sidebar-header {
        justify-content: space-between;
    }
    
    .capabilities {
        display: none; /* Simplify welcome screen on mobile */
    }
}

/* Markdown Styles (simplified) */
.message-content pre {
    background-color: #000;
    padding: 1rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    margin: 1rem 0;
    color: #e0e0e0;
}

.message-content code {
    font-family: 'Consolas', 'Monaco', monospace;
}