ui/style.css

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* Global Reset & Base Styles */
html,
body,
[class*="css"] {
    font-family: 'Inter', sans-serif;
    color: #1F2937;
    /* Gray 800 */
}

/* Hide Streamlit Default Elements */
#MainMenu {
    visibility: hidden;
}

footer {
    visibility: hidden;
}

header {
    visibility: hidden;
}

/* Background */
.stApp {
    background-color: #F9FAFB;
    /* Gray 50 */
    background-image: radial-gradient(#E5E7EB 1px, transparent 1px);
    background-size: 20px 20px;
}

/* Container Styling */
.block-container {
    padding-top: 2rem;
    padding-bottom: 3rem;
    max-width: 900px;
}

/* Headings */
h1 {
    font-weight: 800 !important;
    color: #111827;
    text-align: center;
    margin-bottom: 0.5rem !important;
    background: linear-gradient(90deg, #4F46E5, #7C3AED);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

h2 {
    font-weight: 600 !important;
    color: #374151;
    text-align: center;
    font-size: 1.2rem !important;
    margin-bottom: 2rem !important;
    margin-top: 0 !important;
}

h3 {
    color: #111827;
    font-weight: 600 !important;
    font-size: 1.1rem !important;
    margin-top: 1rem !important;
}

.stTabs [data-baseweb="tab-list"] {
    gap: 8px;
    background-color: transparent;
    padding-bottom: 10px;
}

.stTabs [data-baseweb="tab"] {
    height: 45px;
    white-space: pre-wrap;
    background-color: #FFFFFF;
    border-radius: 8px;
    color: #4B5563;
    font-weight: 500;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    border: 1px solid #E5E7EB;
    transition: all 0.2s ease;
}

.stTabs [aria-selected="true"] {
    background-color: #4F46E5 !important;
    color: white !important;
    border: none !important;
    box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.2);
}

/* Button Styling (Primary) */
div.stButton>button {
    width: 100%;
    background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
    color: white !important;
    border: none;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-weight: 600;
    transition: transform 0.1s, box-shadow 0.2s;
    box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.3);
}

div.stButton>button:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 8px -1px rgba(79, 70, 229, 0.4);
    border: none;
    color: white !important;
}

div.stButton>button:active {
    transform: translateY(0);
}

/* Success/Info Messages */
.stAlert {
    border-radius: 8px;
    border: none;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

/* Images */
img {
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s;
}

img:hover {
    transform: scale(1.02);
}

/* Custom helper classes for dividers */
hr {
    border-top: 1px solid #E5E7EB;
    margin: 2rem 0;
}