:root {
    /* Ana Renk Paleti */
    --primary-color: #2B4865; /* Koyu mavi */
    --secondary-color: #E49B0F; /* Altýn sarýsý */
    --accent-color: #256D85; /* Orta mavi */
    --text-dark: #1A1A1A; /* Koyu gri */
    --text-light: #FFFFFF; /* Beyaz */
    --bg-light: #F5F5F5; /* Açýk gri */
    --bg-dark: #1A374D; /* Koyu lacivert */
    --card-bg: #FFFFFF; /* Beyaz */
    --hover-color: #1A374D; /* Hover için koyu ton */
    --border-color: #E0E0E0; /* Border rengi */
    --shadow-color: rgba(0,0,0,0.1); /* Gölge rengi */
}

/* Genel Stiller */
body {
    background-color: var(--bg-light);
    color: var(--text-dark);
    font-family: 'Segoe UI', system-ui, sans-serif;
    line-height: 1.6;
}

/* Navbar Stilleri */
.navbar {
    background: linear-gradient(135deg, #286e80, #224c6d) !important;
    padding: 0.8rem 0;
    box-shadow: 0 2px 10px var(--shadow-color);
}

.navbar-brand {
    color: var(--text-light) !important;
    font-weight: 700;
    font-size: 1.4rem;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

    .navbar-brand i {
        color: var(--secondary-color);
        margin-right: 0.5rem;
    }

.nav-link {
    color: var(--text-light) !important;
    font-weight: 500;
    padding: 0.7rem 1.2rem !important;
    border-radius: 6px;
    transition: all 0.3s ease;
    position: relative;
}

    .nav-link::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        width: 0;
        height: 2px;
        background: var(--secondary-color);
        transition: all 0.3s ease;
        transform: translateX(-50%);
    }

    .nav-link:hover::after {
        width: 80%;
    }

/* Arama Çubuðu */
.form-control {
    background-color: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    color: var(--text-light);
    border-radius: 20px;
    padding: 0.6rem 1.2rem;
    transition: all 0.3s ease;
}

    .form-control:focus {
        background-color: rgba(255,255,255,0.15);
        border-color: var(--secondary-color);
        box-shadow: 0 0 0 0.2rem rgba(228, 155, 15, 0.25);
    }

    .form-control::placeholder {
        color: rgba(255,255,255,0.7);
    }

/* Kategori Butonlarý */
.category-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    padding: 10px 0;
}

.category-btn {
    background-color: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 25px;
    padding: 10px 20px;
    color: var(--text-dark);
    transition: all 0.3s ease;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
}

    .category-btn:hover {
        background-color: var(--primary-color);
        border-color: var(--primary-color);
        color: var(--text-light);
        transform: translateY(-2px);
    }

/* Kitap Kartlarý */
.book-card {
    background-color: var(--card-bg);
    border: none;
    border-radius: 12px;
    box-shadow: 0 3px 15px var(--shadow-color);
    transition: all 0.3s ease;
    overflow: hidden;
}

    .book-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 8px 25px var(--shadow-color);
    }

.card-img-top {
    transition: all 0.3s ease;
}

.book-card:hover .card-img-top {
    transform: scale(1.05);
}

.card-body {
    padding: 1.5rem;
}

.card-title {
    color: var(--text-dark);
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.price {
    color: var(--secondary-color);
    font-weight: 700;
    font-size: 1.3rem;
}

/* Badge Stilleri */
.badge-discount {
    background-color: var(--secondary-color) !important;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 500;
    font-size: 0.9rem;
}

/* Butonlar */
.btn-primary {
    background-color: #2c6471 !important;
    border-color: var(--primary-color) !important;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
}

    .btn-primary:hover {
        background-color: var(--hover-color) !important;
        transform: translateY(-2px);
    }

/* Bölüm Baþlýklarý */
.section-title {
    color: var(--text-dark);
    font-weight: 700;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    position: relative;
}

    .section-title::after {
        content: '';
        position: absolute;
        left: 0;
        bottom: 0;
        width: 100%;
        height: 2px;
        background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    }

/* Footer */
footer {
    background: linear-gradient(135deg, #2d6673, #17677b) !important;
    color: var(--text-light);
    padding: 4rem 0 2rem;
    margin-top: 5rem;
}

    footer h5 {
        color: var(--secondary-color);
        font-weight: 600;
        margin-bottom: 1.5rem;
    }

    footer a {
        color: #fff;
        transition: all 0.3s ease;
        text-decoration: none;
        display: block;
        margin-bottom: 0.8rem;
    }

        footer a:hover {
            color: var(--secondary-color) !important;
            transform: translateX(5px);
        }

/* Carousel */
.carousel-inner {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px var(--shadow-color);
}

.carousel-caption {
    background: linear-gradient(rgba(0,0,0,0), rgba(0,0,0,0.8));
    border-radius: 0 0 15px 15px;
    padding: 2rem 1rem 1rem;
    bottom: 0;
    left: 0;
    right: 0;
}

.carousel-indicators {
    margin-bottom: 1rem;
}

.carousel-control-prev,
.carousel-control-next {
    width: 5%;
    opacity: 0.7;
}

/* Responsive */
@media (max-width: 992px) {
    .navbar-collapse {
        background-color: var(--primary-color);
        padding: 1rem;
        border-radius: 8px;
        margin-top: 1rem;
    }

    .nav-link::after {
        display: none;
    }
}

@media (max-width: 768px) {
    .category-buttons {
        gap: 8px;
    }

    .category-btn {
        padding: 8px 16px;
        font-size: 0.8rem;
    }

    .book-card {
        margin-bottom: 1.5rem;
    }

    .carousel-caption {
        padding: 1rem;
    }
}

/* Animasyonlar */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.book-card {
    animation: fadeIn 0.5s ease-out;
}