:root {
    --bg: #0e0e11;
    --sidebar-bg: #18191b;
    --accent: #4b90ff;
    --text: #e3e3e3;
    --text-dim: #b4b4b4;
    --border: #333;
    --glass: rgba(255, 255, 255, 0.05);
    --bubble-ai: #1e1f20;
    --bubble-user: #2b2c2f;
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    margin: 0;
    height: 100vh;
    display: flex;
    overflow: hidden;
}

.sidebar {
    width: 280px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 20px;
    z-index: 100;
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    background: linear-gradient(to right, #4b90ff, #ff71ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-item {
    padding: 12px 15px;
    border-radius: 12px;
    cursor: pointer;
    color: var(--text-dim);
    transition: 0.2s;
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 5px;
    font-weight: 500;
}

.nav-item:hover, .nav-item.active {
    background: var(--glass);
    color: #fff;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    background: radial-gradient(circle at top right, rgba(75, 144, 255, 0.05), transparent);
}

.status-pill {
    background: var(--glass);
    padding: 6px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    color: var(--text-dim);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 6px;
}

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

.chat-container {
    flex: 1;
    padding: 40px 15%;
    overflow-y: auto;
    scroll-behavior: smooth;
}

.message {
    margin-bottom: 30px;
    max-width: 85%;
    animation: fadeIn 0.4s ease;
    line-height: 1.6;
    font-size: 1.05rem;
}

.message.user {
    margin-left: auto;
    background: var(--bubble-user);
    padding: 15px 25px;
    border-radius: 24px;
    color: #fff;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.message.assistant {
    margin-right: auto;
}

.input-area {
    padding: 20px 15% 40px;
    background: transparent;
}

.input-wrapper {
    background: #1e1f20;
    border-radius: 32px;
    padding: 8px 25px;
    display: flex;
    align-items: center;
    border: 1px solid transparent;
    transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 30px rgba(0,0,0,0.4);
}

.input-wrapper:focus-within {
    border-color: var(--accent);
    background: #252629;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
}

input[type="text"] {
    flex: 1;
    background: transparent;
    border: none;
    color: #fff;
    padding: 15px;
    font-size: 1rem;
    outline: none;
}

.send-btn {
    background: none;
    border: none;
    color: var(--accent);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 10px;
    transition: 0.2s;
}

.send-btn:hover {
    transform: scale(1.1);
}

/* Modal Styling */
.overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.9);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.modal {
    background: var(--sidebar-bg);
    padding: 40px;
    border-radius: 32px;
    width: 480px;
    border: 1px solid var(--border);
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}

.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; color: var(--text-dim); font-size: 0.9rem; }
.form-group input, .form-group select {
    width: 100%;
    padding: 12px 15px;
    background: #0e0e11;
    border: 1px solid var(--border);
    color: #fff;
    border-radius: 12px;
    outline: none;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

.thinking-bubble {
    color: var(--accent);
    font-style: italic;
    font-size: 0.95rem;
    padding: 10px 0;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

pre {
    background: #000 !important;
    padding: 24px !important;
    border-radius: 16px;
    border: 1px solid var(--border);
    margin: 15px 0;
}