/* Global reset */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Document basics */
html {
    font-size: 16px;
    line-height: 1.5;
    font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
    color: #1f2933;
    background-color: #f7f9fc;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Layout helpers */
main {
    flex: 1;
    width: min(60rem, 90vw);
    margin: 2rem auto;
    padding: 2rem;
    background: #ffffff;
    border-radius: 1rem;
    box-shadow: 0 15px 35px rgba(15, 23, 42, 0.08);
}

/* Headings & text */
h1, h2, h3 {
    line-height: 1.2;
    font-weight: 600;
    color: #0f172a;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1rem;
    color: #475569;
}

/* Links & buttons */
a {
    color: #2563eb;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

button {
    border: none;
    border-radius: 999px;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.3);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(99, 102, 241, 0.35);
}

/* Utilities */
.section {
    margin-bottom: 2rem;
}

.card {
    padding: 1.5rem;
    border-radius: 1rem;
    background: #f1f5f9;
}