body { 
    font-family: 'Inter', sans-serif; 
}

/* Custom CSS for Flow Diagram (No SVG) */
.flow-node {
    transition: all 0.3s ease;
    border: 2px solid #e7e5e4; /* stone-200 */
}
.flow-node.active {
    border-color: #d97706; /* amber-600 */
    background-color: #fffbeb; /* amber-50 */
    box-shadow: 0 4px 6px -1px rgba(217, 119, 6, 0.1);
    transform: scale(1.02);
}
.flow-node.completed {
    border-color: #22c55e; /* green-500 */
    color: #15803d;
}
.flow-line {
    height: 2px;
    background-color: #e7e5e4;
    flex-grow: 1;
    transition: background-color 0.3s ease;
}
.flow-line.active {
    background-color: #d97706;
}

/* Chat Specific Styling */
.chat-container {
    height: 70vh; /* Fixed height for chat window */
    min-height: 400px;
    overflow-y: auto;
    scroll-behavior: smooth;
    border: 1px solid #e7e5e4;
}
.bot-message {
    background-color: #ffffff;
    border-top-left-radius: 0.75rem;
    border-bottom-right-radius: 0.75rem;
}
.user-message {
    background-color: #fcd34d; /* amber-300 */
    border-top-right-radius: 0.75rem;
    border-bottom-left-radius: 0.75rem;
}

/* Chart Container Styling - Mandatory */
.chart-container {
    position: relative;
    width: 100%;
    max-width: 400px; 
    margin-left: auto;
    margin-right: auto;
    height: 250px;
    max-height: 300px;
}

/* Modal for LLM response */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 50;
}
.modal-content {
    background: white;
    padding: 1.5rem;
    border-radius: 1rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    max-width: 90%;
    max-height: 90%;
    overflow-y: auto;
}

/* Landing page helpers */
.landing-hero {
    max-width: 900px;
    margin: 0 auto;
}
.btn-primary {
    background-color: #d97706; /* amber-600 */
    color: #fff;
    padding: 0.75rem 1.25rem;
    border-radius: 0.75rem;
    text-decoration: none;
    display: inline-block;
    font-weight: 600;
}
.btn-primary:hover {
    background-color: #b45309; /* darker amber */
}