/* style.css - Professional Slate & Indigo Theme */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');

body {
    background-color: #f8fafc; /* Very light slate for background */
    color: #1e293b; /* Dark slate for text */
    font-family: 'Inter', sans-serif;
    padding: 50px 20px;
    margin: 0;
}

.header { 
    text-align: center; 
    margin-bottom: 60px; 
}

.header h1 { 
    color: #0f172a; 
    font-weight: 700;
    letter-spacing: -1px;
}

.header p { color: #64748b; }

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
}

.card {
    background: #ffffff; /* Clean white cards */
    width: 100%;
    max-width: 600px;
    padding: 40px;
    border-radius: 12px;
    /* Soft professional shadow */
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    position: relative;
    border: 1px solid #e2e8f0;
}

/* Side Numbering - Professional Indigo */
.badge {
    position: absolute;
    left: -20px;
    top: 25px;
    background: #4f46e5; /* Indigo */
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1rem;
    box-shadow: 0 10px 15px -3px rgba(79, 70, 229, 0.3);
}

h3 { 
    margin-top: 0; 
    color: #1e293b; 
    font-size: 1.25rem;
    font-weight: 600;
}

.desc { 
    font-size: 0.875rem; 
    color: #64748b; 
    margin-bottom: 25px; 
}

label { 
    display: block; 
    font-size: 0.75rem; 
    font-weight: 600; 
    color: #475569; 
    margin-top: 15px; 
    text-transform: uppercase;
}

input {
    width: 100%;
    padding: 12px;
    margin-top: 6px;
    background-color: #f1f5f9; /* Light gray input */
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    color: #1e293b;
    box-sizing: border-box;
    font-size: 1rem;
    transition: all 0.2s;
}

input:focus {
    border-color: #4f46e5;
    background-color: #ffffff;
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
    outline: none;
}

/* Button - Professional Indigo */
button {
    width: 100%;
    margin-top: 25px;
    padding: 12px;
    background: #4f46e5;
    color: white;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: background 0.2s;
}

button:hover {
    background: #4338ca;
}

.result-box {
    margin-top: 25px;
    background: #f8fafc;
    padding: 20px;
    border-radius: 8px;
    border-top: 3px solid #4f46e5; /* Clean top border instead of side */
    color: #334155;
    font-size: 0.9rem;
    line-height: 1.6;
}