/* =====================================
   SKY BRAND COLORS
===================================== */
:root {
    --sky-s: #00c4ff;   /* Cyan Blue */
    --sky-k: #ff005e;   /* Pinkish Red */
    --sky-y: #00ffb3;   /* Neon Green */
    --text-dark: #1e1e1e;
    --text-light: #555;
    --bg-light: #ffffff;
    --bg-gray: #f5f7fa;
    --border-color: #e6e6e6;
}

/* =====================================
   HOME PAGE HERO SECTION
===================================== */
.home-hero {
    text-align: center;
    padding: 70px 25px;
    background: linear-gradient(135deg, var(--sky-s), var(--sky-k));
    border-radius: 18px;
    color: #fff;
    margin-bottom: 50px;
    box-shadow: 0 5px 18px rgba(0,0,0,0.15);
}
.home-title {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 10px;
}
.home-subtitle {
    font-size: 18px;
    margin-bottom: 25px;
    opacity: 0.9;
}

/* LANG BUTTONS */
.lang-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
}
.lang-btn {
    padding: 12px 26px;
    background: #ffffff;
    color: #000;
    border-radius: 8px;
    font-weight: 700;
    text-decoration: none;
    transition: 0.3s;
    border: 2px solid #fff;
}
.lang-btn:hover {
    background: var(--sky-y);
    color: #000;
}

/* =====================================
   CATEGORY GRID SECTION
===================================== */
.home-category-section {
    margin-top: 40px;
}
.home-category-section .section-title {
    font-size: 30px;
}
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 25px;
}
.category-card {
    background: #fff;
    padding: 25px 15px;
    border-radius: 14px;
    text-align: center;
    text-decoration: none;
    border: 1px solid var(--border-color);
    box-shadow: 0 3px 12px rgba(0,0,0,0.05);
    transition: 0.3s;
}
.category-card:hover {
    transform: translateY(-4px);
    border-color: var(--sky-k);
    box-shadow: 0 6px 14px rgba(0,0,0,0.1);
}
.category-card-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--sky-s);
}

/* =====================================
   RECENT BOOKS SECTION
===================================== */
.recent-books {
    margin-top: 55px;
}
.recent-books .category-card-title {
    color: var(--sky-k);
}

/* =====================================
   RESPONSIVE MOBILE
===================================== */
@media(max-width: 768px){
    .home-title { font-size: 30px; }
    .home-subtitle { font-size: 15px; }
    .lang-buttons { flex-direction: column; }
    .lang-btn { width: 80%; margin: auto; }
    .category-grid { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
}