/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: #fafafa;
    color: #1a1a1a;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

/* Layout */
.container {
    max-width: 620px;
    margin: 0 auto;
    padding: 80px 24px 60px;
}

/* Header */
header {
    margin-bottom: 64px;
}

.avatar {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: #1a1a1a;
    color: #fafafa;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.1rem;
    letter-spacing: 0.5px;
    margin-bottom: 24px;
}

h1 {
    font-size: 1.75rem;
    font-weight: 600;
    letter-spacing: -0.5px;
    margin-bottom: 6px;
}

.tagline {
    color: #888;
    font-size: 0.95rem;
    font-weight: 300;
}

/* Updates */
.updates {
    display: flex;
    flex-direction: column;
    gap: 48px;
    margin-bottom: 80px;
}

.update {
    border-left: 2px solid #e0e0e0;
    padding-left: 24px;
}

.update time {
    display: block;
    font-size: 0.8rem;
    font-weight: 500;
    color: #999;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.update h2 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.3px;
}

.update p {
    color: #444;
    font-size: 0.95rem;
    font-weight: 300;
}

.book-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 4px;
}

.book-list li {
    color: #444;
    font-size: 0.95rem;
    font-weight: 300;
    padding-left: 16px;
    position: relative;
}

.book-list li::before {
    content: "—";
    position: absolute;
    left: 0;
    color: #ccc;
}

/* Back link */
.back {
    display: inline-block;
    font-size: 0.85rem;
    color: #999;
    text-decoration: none;
    margin-bottom: 40px;
    font-weight: 400;
}

.back:hover {
    color: #1a1a1a;
}

/* Nav Cards */
.page-nav {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 80px;
}

.nav-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 20px;
    border: 1px solid #e8e8e8;
    border-radius: 8px;
    text-decoration: none;
    color: #1a1a1a;
    transition: border-color 0.15s, background 0.15s;
}

.nav-card:hover {
    border-color: #1a1a1a;
    background: #f5f5f5;
}

.nav-title {
    font-size: 0.95rem;
    font-weight: 500;
}

.nav-arrow {
    font-size: 1rem;
    color: #bbb;
}

/* Footer */
footer {
    border-top: 1px solid #eee;
    padding-top: 24px;
}

footer p {
    font-size: 0.8rem;
    color: #bbb;
    font-weight: 300;
}

/* Mobile */
@media (max-width: 480px) {
    .container {
        padding: 48px 20px 40px;
    }

    h1 {
        font-size: 1.5rem;
    }

    .updates {
        gap: 36px;
    }
}