:root {
    --bg-color: #09090b;
    --surface-color: #18181b;
    --card-bg: #27272a;
    --text-color: #fafafa;
    --secondary-text: #a1a1aa;
    --primary-color: #3b82f6;
    --border-color: #3f3f46;
    --accent-color: #60a5fa;
    --shadow: 0 10px 15px -3px rgb(0 0 0 / 0.5);
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 1000px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

header {
    text-align: center;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #60a5fa, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hidden { display: none !important; }

/* Buttons */
.primary-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s;
}
.primary-btn:hover { background-color: #2563eb; transform: translateY(-1px); }
.secondary-btn {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.8);
    display: flex; align-items: center; justify-content: center;
    z-index: 1000;
}
.modal {
    background: var(--surface-color);
    padding: 2rem;
    border-radius: 1rem;
    width: 90%; max-width: 500px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}
.modal h2 { margin-top: 0; }
.form-group { margin-bottom: 1.2rem; }
.form-group label { display: block; margin-bottom: 0.5rem; color: var(--secondary-text); font-size: 0.9rem; }
.form-group input, .form-group textarea {
    width: 100%;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: white;
    padding: 0.75rem;
    border-radius: 0.4rem;
    font-family: inherit;
}

/* Chat Interface */
.chat-container {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    display: flex;
    flex-direction: column;
    height: 600px;
}
#chatMessages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.message {
    max-width: 85%;
    padding: 0.8rem 1.2rem;
    border-radius: 1rem;
    line-height: 1.5;
}
.user-message {
    align-self: flex-end;
    background: var(--primary-color);
    color: white;
}
.ai-message {
    align-self: flex-start;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
}
.status-update {
    font-size: 0.85rem;
    color: var(--accent-color);
    font-style: italic;
    margin: 0.5rem 0;
}

.chat-input-area {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 0.5rem;
}
#userInput {
    flex: 1;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: white;
    padding: 0.75rem;
    border-radius: 0.5rem;
}

/* Dashboard / Visualization */
.dashboard-view {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
.card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 1rem;
}
.chart-container { height: 300px; }

/* Markdown Styling */
.markdown-body table { width: 100%; border-collapse: collapse; margin: 1rem 0; }
.markdown-body th, .markdown-body td { border: 1px solid var(--border-color); padding: 0.5rem; }
.markdown-body th { background: var(--card-bg); }