:root {
    --bg-color: #fcfcfc;
    --text-primary: #1a1a1a;
    --text-secondary: #555;
    --accent: #000;
    --card-bg: #fff;
    --shadow: 0 4px 20px rgba(0,0,0,0.05);
    --border: #ececec;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    display: flex;
    justify-content: center;
    padding: 40px 20px;
}

.container {
    max-width: 800px;
    width: 100%;
}

header {
    text-align: center;
    margin-bottom: 50px;
}

h1 {
    font-size: 2.5rem;
    font-weight: 600;
    letter-spacing: -1px;
    margin-bottom: 10px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 300;
}

.intro {
    background: #f8f8f8;
    padding: 25px;
    border-radius: 12px;
    margin-bottom: 30px;
    border: 1px solid var(--border);
}

.intro p:first-child {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

main {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 16px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: transform 0.2s ease;
}

.card:hover {
    transform: translateY(-2px);
}

h2 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    border-left: 3px solid var(--accent);
    padding-left: 15px;
}

p {
    margin-bottom: 15px;
    color: var(--text-primary);
}

ul {
    list-style: none;
    margin-top: 10px;
}

li {
    margin-bottom: 12px;
    padding-left: 20px;
    position: relative;
}

li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--text-secondary);
}

li strong {
    color: var(--accent);
}

footer {
    margin-top: 60px;
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid var(--border);
}

@media (max-width: 600px) {
    h1 { font-size: 2rem; }
    .card { padding: 20px; }
}