:root {
    --bg: #f7f8fb;
    --card: #ffffff;
    --accent: #2b6ef6;
    --muted: #666;
    --maxw: 1100px;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}

* {
    box-sizing: border-box
}

body {
    margin: 0;
    background: var(--bg);
    color: #111
}

.container {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 20px
}

.site-header {
    background: #fff;
    border-bottom: 1px solid #e6e9ef
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between
}

.logo {
    margin: 12px 0;
    font-size: 1.25rem;
    color: var(--accent)
}

nav a {
    margin-left: 16px;
    color: #333;
    text-decoration: none
}

nav a[aria-current="page"] {
    font-weight: 600;
    color: var(--accent)
}

.hero {
    padding: 36px;
    background: linear-gradient(90deg, rgba(43, 110, 246, 0.06), transparent);
    border-radius: 8px;
    margin: 20px 0
}

.hero h2 {
    margin: 0 0 8px
}

.cta .btn {
    display: inline-block;
    padding: 10px 16px;
    background: var(--accent);
    color: #fff;
    border-radius: 6px;
    text-decoration: none;
    margin-right: 8px
}

.cta .outline {
    background: transparent;
    border: 1px solid var(--accent);
    color: var(--accent)
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin: 24px 0
}

.features article {
    background: var(--card);
    padding: 16px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04)
}

.newsletter {
    background: var(--card);
    padding: 16px;
    border-radius: 8px;
    margin: 20px 0;
    display: flex;
    flex-direction: column;
    gap: 12px
}

.newsletter form {
    display: flex;
    gap: 8px
}

.newsletter input[type="email"] {
    flex: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 6px
}

.newsletter button {
    padding: 10px 14px;
    background: var(--accent);
    border: none;
    color: #fff;
    border-radius: 6px
}

.muted {
    color: var(--muted);
    font-size: 0.95rem
}

.site-footer {
    padding: 20px 0;
    text-align: center;
    color: var(--muted)
}

.filters {
    display: flex;
    gap: 8px;
    align-items: center;
    margin: 12px 0
}

.filters select,
.filters input {
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 6px
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
    margin-top: 12px
}

.book {
    background: var(--card);
    padding: 12px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04)
}

.book .title {
    font-weight: 700
}

.book .meta {
    font-size: 0.9rem;
    color: var(--muted);
    margin-bottom: 8px
}

.book .actions {
    display: flex;
    gap: 8px
}

.book .btn {
    padding: 8px 10px;
    border-radius: 6px;
    text-decoration: none;
    color: #fff;
    background: var(--accent)
}

.book .btn.secondary {
    background: #4b5563
}

label {
    display: block;
    margin-bottom: 8px
}

input,
textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 6px;
    margin-top: 6px
}

button {
    padding: 10px 14px;
    border-radius: 6px;
    border: none;
    background: var(--accent);
    color: #fff;
    cursor: pointer
}

@media(max-width:600px) {
    .site-header .container {
        flex-direction: column;
        align-items: flex-start
    }

    nav {
        margin-top: 8px
    }
}