:root {
    --bg: #f7f8fa;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --accent: #2563eb;
    --border: #e5e7eb;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
}

.container {
    max-width: 900px;
    margin: 60px auto;
    padding: 0 20px;
}

.card {
    background: var(--card);
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    border: 1px solid var(--border);
}

h1 {
    font-size: 32px;
    margin-bottom: 10px;
}

h2 {
    font-size: 22px;
    margin-top: 35px;
    margin-bottom: 10px;
}

h3 {
    font-size: 18px;
    margin-top: 20px;
    margin-bottom: 6px;
}

p {
    margin-bottom: 14px;
    color: var(--text);
}

ul {
    padding-left: 20px;
    margin-bottom: 14px;
}

li {
    margin-bottom: 6px;
}

footer {
    margin-top: 40px;
    font-size: 14px;
    color: var(--muted);
}

.backarr {
   font-size: 20px;
   cursor: pointer;
}