/* ---------------------------------------------------------
   ZÁKLADNÍ NASTAVENÍ
--------------------------------------------------------- */
body {
    font-family: "Segoe UI", Tahoma, sans-serif;
    margin: 0;
    padding: 0;
    background: #f7f7f7;
    color: #222;
}

a {
    color: #0066cc;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

h1, h2, h3 {
    margin-top: 0;
}

/* ---------------------------------------------------------
   HLAVIČKA
--------------------------------------------------------- */
header {
    background: #ffffff;
    padding: 20px;
    border-bottom: 1px solid #ddd;
    text-align: center;
}

header h1 {
    font-size: 2rem;
    margin-bottom: 5px;
}

/* ---------------------------------------------------------
   HLAVNÍ OBSAH
--------------------------------------------------------- */
main {
    max-width: 1200px;
    margin: 30px auto;
    padding: 0 20px;
}

/* ---------------------------------------------------------
   MŘÍŽKA KNIH NA INDEXU
--------------------------------------------------------- */
.knihy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 25px;
}

.kniha-karta {
    background: #fff;
    border-radius: 6px;
    padding: 12px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.kniha-karta:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}

.kniha-karta img {
    width: 100%;
    height: auto;
    border-radius: 4px;
}

.kniha-nazev {
    font-weight: bold;
    margin-top: 10px;
    text-align: center;
}

.kniha-autor {
    font-size: 0.9rem;
    color: #555;
    text-align: center;
}

.kniha-cena {
    margin-top: 8px;
    font-weight: bold;
    color: #b30000;
    text-align: center;
}

/* ---------------------------------------------------------
   DETAIL KNIHY
--------------------------------------------------------- */
.obalka-detail {
    text-align: center;
    margin-bottom: 25px;
}

.obalka-detail img {
    width: 260px;
    height: auto;
    border-radius: 6px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.15);
}

.anotace, .parametry {
    background: #fff;
    padding: 20px;
    border-radius: 6px;
    margin-bottom: 25px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}

.parametry ul {
    list-style: none;
    padding-left: 0;
}

.parametry li {
    padding: 4px 0;
}

/* ---------------------------------------------------------
   TLAČÍTKO OBJEDNAT
--------------------------------------------------------- */
.objednat {
    text-align: center;
    margin: 30px 0;
}

.tlacitko {
    background: #0077cc;
    color: white;
    padding: 12px 22px;
    border-radius: 6px;
    font-size: 1.1rem;
    display: inline-block;
    transition: background 0.2s ease;
}

.tlacitko:hover {
    background: #005fa3;
}

/* ---------------------------------------------------------
   ODKAZ ZPĚT
--------------------------------------------------------- */
.zpet {
    margin-top