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

body {
    font-family: 'Inter', sans-serif;
    background: rgb(255, 255, 255);
    color: rgb(29, 29, 31);
}

.back-nav {
    padding: 13px 32px 12px;
    border-bottom: 1px solid rgba(0,0,0,0.07);
}

.back-link {
    font-size: 12px;
    font-weight: 500;
    color: rgba(0,0,0,0.42);
    text-decoration: none;
    letter-spacing: 0.01em;
}

.back-link:hover { color: rgb(29, 29, 31); }

.content {
    padding: 24px 32px 40px;
}

h1 {
    font-size: 18px;
    font-weight: 600;
    color: rgb(29, 29, 31);
    margin-bottom: 24px;
    padding-bottom: 14px;
    border-bottom: 1px solid rgba(0,0,0,0.08);
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px 28px;
}

.category h2 {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(0,0,0,0.35);
    margin-bottom: 10px;
}

.category ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.category li {
    font-size: 13px;
    color: rgba(0,0,0,0.62);
    line-height: 1.45;
    padding-left: 12px;
    position: relative;
}

.category li::before {
    content: '·';
    position: absolute;
    left: 2px;
    color: rgba(0,0,0,0.25);
}

.category li strong {
    color: rgba(0,0,0,0.78);
    font-weight: 500;
}

@media (max-width: 720px) {
    .back-nav { padding: 12px 20px; }
    .content { padding: 20px 20px 32px; }
}

@media (max-width: 480px) {
    .grid { grid-template-columns: 1fr; }
}

@media (min-width: 481px) and (max-width: 720px) {
    .grid { grid-template-columns: repeat(2, 1fr); }
}