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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f8f6f3;
    color: #2c2c2c;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background: linear-gradient(135deg, #1a5c3a, #0d3320);
    color: white;
    padding: 30px 20px;
    text-align: center;
}

header h1 { font-size: 2em; margin-bottom: 8px; }
.tagline { font-size: 1.1em; opacity: 0.9; }

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 24px;
    padding: 30px 20px;
    max-width: 1100px;
    margin: 0 auto;
    flex: 1;
}

.book-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: transform 0.2s;
}

.book-card:hover { transform: translateY(-4px); }

.book-cover {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.book-emoji { font-size: 64px; }

.book-card h3 { padding: 16px 16px 4px; font-size: 1.1em; }
.book-card .author { padding: 0 16px; color: #666; font-size: 0.9em; }
.book-card .price { padding: 8px 16px; font-size: 1.2em; color: #1a5c3a; font-weight: bold; }

.buy-btn {
    display: block;
    width: calc(100% - 32px);
    margin: 8px 16px 16px;
    padding: 12px;
    background: #1a5c3a;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    cursor: pointer;
    transition: background 0.2s;
}

.buy-btn:hover { background: #0d3320; }

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal {
    background: white;
    border-radius: 16px;
    padding: 32px;
    max-width: 420px;
    width: 90%;
    text-align: center;
}

.modal h2 { margin-bottom: 16px; }
.modal p { margin-bottom: 12px; color: #555; line-height: 1.5; }

.modal-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 20px 0;
}

.btn-primary {
    padding: 14px 24px;
    background: #1a5c3a;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    cursor: pointer;
}

.btn-primary:hover { background: #0d3320; }

.btn-secondary {
    padding: 14px 24px;
    background: transparent;
    color: #1a5c3a;
    border: 2px solid #1a5c3a;
    border-radius: 8px;
    font-size: 1em;
    cursor: pointer;
}

.btn-secondary:hover { background: #f0f7f3; }

.modal-note { font-size: 0.8em; color: #999; margin-top: 12px; }

.modal input[type="text"],
.modal input[type="email"] {
    width: 100%;
    padding: 12px;
    margin-bottom: 10px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1em;
}

.hidden { display: none !important; }

footer {
    text-align: center;
    padding: 20px;
    color: #999;
    font-size: 0.9em;
}

@media (max-width: 600px) {
    header h1 { font-size: 1.5em; }
    .books-grid { grid-template-columns: 1fr 1fr; gap: 12px; padding: 16px; }
}