:root {
    --primary-color: #ef4444; /* Red-500 from Tailwind/Matierial Red */
    --secondary-color: #4b5563;
    --bg-color: #f9fafb;
    --card-bg: #ffffff;
    --text-color: #1f2937;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

header h1 {
    color: var(--primary-color);
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    padding: 2rem;
    margin-bottom: 2rem;
}

h2 {
    color: var(--text-color);
    border-bottom: 2px solid #e5e7eb;
    padding-bottom: 0.5rem;
    margin-top: 2rem;
}

ul {
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
}

.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.2s;
}

.btn:hover {
    background-color: #dc2626; /* Darker red */
}

.center {
    text-align: center;
}

.footer {
    text-align: center;
    margin-top: 3rem;
    color: var(--secondary-color);
    font-size: 0.875rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}