/* =========================
   RESET & BASE
========================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f9f9f9;
    color: #222;
    line-height: 1.7;
    font-size: 16px;
}

/* =========================
   LAYOUT
========================= */
article {
    max-width: 800px;
    margin: 40px auto;
    padding: 30px;
    background: #ffffff;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

/* =========================
   TYPOGRAPHY
========================= */
h1 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: #1a1a1a;
    line-height: 1.3;
}

h2 {
    font-size: 1.5rem;
    margin-top: 30px;
    margin-bottom: 15px;
    color: #2c3e50;
}

h3 {
    font-size: 1.2rem;
    margin-top: 20px;
    margin-bottom: 10px;
    color: #34495e;
}

p {
    margin-bottom: 15px;
}

/* =========================
   LISTS
========================= */
ul {
    margin: 15px 0 20px 20px;
}

li {
    margin-bottom: 8px;
}

/* =========================
   EMPHASIS
========================= */
em {
    color: #555;
    font-style: italic;
}

strong {
    font-weight: bold;
}

/* =========================
   LINKS
========================= */
a {
    color: #1a73e8;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.btn-site {
    display: inline-block;
    padding: 10px 18px;
    background-color: #2c3e50;
    color: #ffffff;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: all 0.2s ease;
}

.btn-site:hover {
    background-color: #1a252f;
    transform: translateY(-1px);
}

/* =========================
   SECTIONS SPACING
========================= */
h2 + p,
h3 + p {
    margin-top: 5px;
}

/* =========================
   MOBILE
========================= */
@media (max-width: 768px) {
    article {
        margin: 20px;
        padding: 20px;
    }

    h1 {
        font-size: 1.6rem;
    }

    h2 {
        font-size: 1.3rem;
    }
}