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

:root {
    --primary-color: #4a47a3;
    --secondary-color: #706fd3;
    --background-color: #f4f7f9;
    --text-color: #333;
    --card-bg: #ffffff;
    --shadow-color: rgba(0, 0, 0, 0.08);
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex-grow: 1;
}

/* Header */
.navbar {
    background-color: var(--card-bg);
    border-bottom: 1px solid #e0e0e0;
    box-shadow: 0 2px 4px var(--shadow-color);
}
.navbar-brand {
    font-weight: 700;
    color: var(--primary-color) !important;
}

/* Main Content */
.tool-title {
    margin-bottom: 2rem;
    font-weight: 700;
}

/* Cards on main page */
.tool-card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--shadow-color);
    transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
    height: 100%;
}
.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px var(--shadow-color);
}
.tool-card .card-title {
    color: var(--primary-color);
    font-weight: 700;
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    transition: background-color 0.2s ease;
}
.btn-primary:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}

/* Form elements */
textarea, input, pre {
    border-radius: 8px !important;
    border-color: #dcdcdc !important;
}
textarea:focus, input:focus {
    box-shadow: 0 0 0 0.25rem rgba(74, 71, 163, 0.25) !important;
    border-color: var(--primary-color) !important;
}

/* Footer */
.footer {
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
    font-size: 0.9rem;
    color: #888;
    background-color: var(--card-bg);
    border-top: 1px solid #e0e0e0;
}