/*
 * =================================================================
 * [00] DARK MODE & CSS VARIABLE SETUP (FIXED)
 * =================================================================
 */

/* Thiết lập các biến màu sắc mặc định (chế độ sáng - Light Mode) */
:root {
    --bg-main: #ffffff; /* Nền trang Body */
    --text-main: #212529; /* Chữ chính Body */
    --navbar-bg: rgba(0,0,0,0.4); /* Nền Navbar (trong suốt) */
    --navbar-scrolled-bg: rgba(15,15,15,0.9);
    --footer-bg: linear-gradient(to right,#111,#000); /* Nền Footer (Gradient) */
    --footer-text: #bbb;
    --input-bg: #ffffff; /* Nền Input/Search box */
    --input-color: #333333; /* Chữ Input */
    --input-border: #f0f0f0; /* Viền Input */
    --modal-bg: #ffffff; /* Nền Modal/Offcanvas */
    --modal-text: #333333;
    --card-bg: #ffffff; /* Nền Card */
    --card-text: #333;
    --accent-orange: #ffaa00; /* Màu cam chính */
    --accent-yellow: #ffd700; /* Màu vàng chính */

    --transition-speed: 0.3s ease-in-out;
}

/* ⚠️ DARK MODE DEFINITION (Chế độ Tối) ⚠️ */
body.dark-mode {
    --bg-main: #121212;
    --text-main: #f0f0f0;
    --navbar-bg: #1f1f1f;
    --navbar-scrolled-bg: #000000;
    --footer-bg: #000000; /* Nền Footer (Màu đặc) */
    --footer-text: #adb5bd;
    --input-bg: #333333;
    --input-color: #f0f0f0;
    --input-border: #444444;
    --modal-bg: #1f1f1f;
    --modal-text: #f0f0f0;
    --card-bg: #2c2c2c;
    --card-text: #f0f0f0;
}


/* ===========================
    1. RESET CƠ BẢN & GLOBAL
    (Đã gỡ bỏ màu cứng và dùng biến)
=========================== */
body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    /* Áp dụng biến cho BODY */
    background-color: var(--bg-main);
    color: var(--text-main);
    transition: background-color var(--transition-speed), color var(--transition-speed);
    line-height: 1.6;
    /* Custom Cursors */
    cursor: url('/Images/book-cursor.png'), auto;
}

a, button, .btn, .icon-btn {
    cursor: url('/Images/book-pointer.png'), pointer;
}

.body-content {
    margin-top: 15px;
    padding: 0 15px;
}

input, select, textarea {
    max-width: 280px;
}

.main-content {
    padding-top: 100px !important;
}

@media (min-width: 768px) {
    .body-content {
        padding: 0;
    }
}

/* ===========================
    2. NAVBAR & HEADER
    (Đã gỡ bỏ !important và dùng biến)
=========================== */
.navbar {
    background: var(--navbar-bg) !important; /* Dùng !important ở đây để đảm bảo ghi đè */
    backdrop-filter: blur(12px);
    border-bottom: 2px solid rgba(255,215,0,0.3);
    transition: all 0.25s ease;
    height: 100px !important;
    padding: 6px 18px !important;
    overflow: visible;
}

    /* trạng thái khi cuộn */
    .navbar.scrolled {
        background: var(--navbar-scrolled-bg) !important;
        border-bottom: 2px solid rgba(255,215,0,0.8) !important;
        height: 50px !important;
        padding: 4px 14px !important;
    }

/* chữ logo */
.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: 'Segoe UI', sans-serif;
    background: linear-gradient(45deg, #FFD700, #FF8C00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    line-height: 1.2;
}

/* link menu */
.navbar .nav-link {
    position: relative;
    display: inline-block;
    overflow: visible;
    padding: 6px 8px !important;
    margin: 0 6px;
    font-size: 0.95rem !important;
    color: #f5f5f5 !important;
    transition: color 0.22s ease, transform 0.22s ease;
}

    /* underline (pseudo element) */
    .navbar .nav-link::after {
        content: "";
        position: absolute;
        left: 0;
        bottom: -4px;
        width: 0;
        height: 2px;
        background: #ffd700;
        transition: width 0.22s ease;
        will-change: width;
    }

    /* hover / focus */
    .navbar .nav-link:hover,
    .navbar .nav-link:focus {
        color: #ffd700 !important;
        outline: none;
    }

        /* show underline on hover / focus */
        .navbar .nav-link:hover::after,
        .navbar .nav-link:focus::after {
            width: 100% !important;
        }

    /* active state */
    .navbar .nav-link.active,
    .navbar .nav-link[aria-current="page"] {
        color: #ffd700 !important;
    }

        .navbar .nav-link.active::after,
        .navbar .nav-link[aria-current="page"]::after {
            width: 100% !important;
        }

/* ===========================
    3. SEARCH BOX
=========================== */
.search-box {
    position: relative;
    width: 180px;
    transition: width 0.4s ease;
}

    .search-box:hover,
    .search-box:focus-within {
        width: 320px;
    }

    .search-box input {
        border-radius: 30px;
        height: 42px;
        padding-left: 38px;
        border: 1px solid rgba(255,215,0,0.6);
        /* Dùng biến cho Input */
        background: var(--input-bg);
        color: var(--input-color);
        transition: all 0.3s ease;
    }

        .search-box input::placeholder {
            color: #999;
        }

        .search-box input:focus {
            border-color: #ff8c00;
            box-shadow: 0 0 8px rgba(255,165,0,0.6);
            outline: none;
        }

.btn-search {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #ff8c00;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.2s ease;
}

    .btn-search:hover {
        transform: translateY(-50%) scale(1.1);
        color: #fff;
    }

/* ===========================
    4. ICON BUTTONS (Cart, Account, Theme)
=========================== */
.navbar .icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    padding: 0;
    border-radius: 50%;
    background: linear-gradient(45deg, #ffb300, #ff9800);
    color: #ffffff;
    border: none;
    box-shadow: 0 6px 14px rgba(0,0,0,0.12);
    cursor: pointer;
    vertical-align: middle;
    font-size: 0;
}

    .navbar .icon-btn i {
        display: block;
        font-size: 20px;
        line-height: 1;
        transform: translateY(0);
        color: #fff !important;
    }

.icon-btn.dropdown-toggle::after {
    display: none !important;
}

.icon-btn.nav-link {
    padding: 0 !important;
}

.icon-btn:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(25,118,210,0.12);
}

@media (max-width: 576px) {
    .navbar .icon-btn {
        width: 40px;
        height: 40px;
    }

        .navbar .icon-btn i {
            font-size: 18px;
        }
}

    /* ===========================
        5. HERO SECTION
    =========================== */
    .hero {
        position: relative;
        min-height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        background: url('../Images/hero-books.jpg') center/cover no-repeat;
        overflow: hidden;
    }

        .hero::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom right,rgba(0,0,0,0.6),rgba(0,0,0,0.4));
            z-index: 1;
        }

    #particles-js {
        position: absolute;
        inset: 0;
        z-index: 0;
    }

    .hero-content {
        position: relative;
        z-index: 2;
        color: #fff;
    }

        .hero-content h1 {
            font-size: 3.5rem;
            font-weight: 900;
            background: linear-gradient(90deg,#ffd700,#ff8c00);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-content p {
            font-size: 1.2rem;
            margin: 20px 0 30px;
            color: #eee;
        }

        .hero-content .btn {
            padding: 14px 36px;
            border-radius: 50px;
            background: linear-gradient(45deg,#ff8c00,#ffd700);
            border: none;
            color: #fff;
            font-weight: 600;
            box-shadow: 0 0 20px rgba(255,165,0,0.5);
            transition: all 0.4s ease;
        }

            .hero-content .btn:hover {
                transform: translateY(-5px) scale(1.05);
                box-shadow: 0 0 40px rgba(255,165,0,0.8);
            }

/* ===========================
    6. CARD & DROPDOWN
=========================== */
.book-card {
    background-color: var(--card-bg);
    color: var(--card-text);
    transition: transform 0.3s, box-shadow 0.3s, background-color var(--transition-speed);
}

    .book-card:hover {
        transform: translateY(-8px) scale(1.03);
        box-shadow: 0 8px 20px rgba(0,0,0,0.2);
    }

.icon-dropdown {
    position: relative;
    margin-left: 10px;
}

    .icon-dropdown .dropdown-menu {
        position: absolute;
        top: 120%;
        right: 0;
        min-width: 220px;
        background: var(--card-bg); /* Dùng biến */
        color: var(--card-text); /* Dùng biến */
        border-radius: 10px;
        box-shadow: 0 8px 20px rgba(0,0,0,0.15);
        display: none;
        padding: 12px;
        z-index: 999;
    }

    .icon-dropdown:hover .dropdown-menu {
        display: block;
    }

/* ===========================
    7. FOOTER
    (Đã gỡ bỏ màu cứng và dùng biến)
=========================== */
footer {
    /* Dùng biến cho footer */
    background: var(--footer-bg);
    color: var(--footer-text);
    padding: 60px 20px;
    text-align: center;
    border-top: 1px solid rgba(255,215,0,0.3);
    position: relative;
    transition: background var(--transition-speed), color var(--transition-speed);
}

    footer::before {
        content: "";
        position: absolute;
        top: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 70%;
        height: 2px;
        background: linear-gradient(90deg,transparent,#ffd700,transparent);
        box-shadow: 0 0 12px #ffd700;
    }

    footer h5 {
        color: #ffd700;
        font-weight: bold;
        margin-bottom: 15px;
    }

    footer a {
        color: #999;
        margin: 0 10px;
        transition: color 0.3s;
        text-decoration: none;
    }

        footer a:hover {
            color: #ffd700;
        }

.footer-container {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 40px;
    margin-top: 30px;
    padding: 20px 0;
    text-align: left;
}

.footer-column {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
/* Form Đăng ký nhận tin */
.footer-newsletter {
    margin-top: 10px;
}

    .footer-newsletter h5 {
        font-weight: 600;
        color: #ffd700;
        font-size: 1.05rem;
        margin-bottom: 12px;
    }

.newsletter-inline {
    display: flex;
    align-items: center;
    max-width: 300px;
    /* Giữ nguyên màu tối cho nền input newsletter để nổi bật */
    background: #222;
    border: 1px solid rgba(255,215,0,0.4);
    border-radius: 25px;
    padding: 4px 8px;
}

    .newsletter-inline input {
        flex: 1;
        border: none;
        outline: none;
        padding: 10px 14px;
        background: transparent;
        color: #eee;
        font-size: 0.95rem;
    }

        .newsletter-inline input::placeholder {
            color: #aaa;
        }

    .newsletter-inline button {
        width: 34px;
        height: 34px;
        border: none;
        border-radius: 50%;
        margin-left: 6px;
        background: linear-gradient(45deg,#ff8c00,#ffd700);
        color: #fff;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: transform 0.2s;
    }

        .newsletter-inline button:hover {
            transform: scale(1.1);
        }

/* Icon mạng xã hội */
.social-links {
    display: flex;
    gap: 14px;
    margin-top: 14px;
}

    .social-links a {
        color: #ffd700;
        font-size: 1.2rem;
        transition: 0.3s;
    }

        .social-links a:hover {
            color: #ff8c00;
        }

/* ===========================
    8. FLOATING BUTTONS
=========================== */
/* Giữ nguyên vì chúng dùng màu gradient cố định */
.floating-buttons {
    position: fixed;
    right: 20px;
    bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 9999;
}

    .floating-buttons button,
    .floating-buttons a {
        width: 46px;
        height: 46px;
        border-radius: 50%;
        border: none;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.2rem;
        cursor: pointer;
        transition: all 0.3s ease;
        color: #fff;
        background: linear-gradient(45deg,#ff8c00,#ffd700);
        box-shadow: 0 4px 10px rgba(0,0,0,0.25);
        text-decoration: none !important;
        line-height: 0;
    }

        .floating-buttons button:hover,
        .floating-buttons a:hover {
            transform: scale(1.1);
            box-shadow: 0 0 12px rgba(255,165,0,0.6);
            color: #fff;
        }

#btnUpTop {
    display: none;
}

.floating-buttons .messenger-btn {
    background: #0084ff !important;
    font-size: 1.3rem;
}

.floating-buttons .zalo-btn {
    background: #0068ff !important;
    padding: 6px;
}

    .floating-buttons .zalo-btn img {
        width: 24px;
        height: 24px;
        display: block;
    }


/* ===========================
    9. LOADING OVERLAY
=========================== */
/* Sử dụng biến cho nền Loading */
#loading-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-main);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    transition: opacity .5s ease;
}

    #loading-overlay.hide {
        opacity: 0;
        pointer-events: none;
    }

.spinner {
    border: 5px solid rgba(0,0,0,0.1);
    border-top: 5px solid #ff8c00;
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    100% {
        transform: rotate(360deg);
    }
}


/* =======================================
    [10] CART OFFCANVAS STYLES
    (Đã dùng biến cho nền và chữ)
======================================= */

/* --- Panel Chính (cart-offcanvas) --- */
.cart-offcanvas {
    height: 100%;
    width: 0;
    position: fixed;
    z-index: 1050;
    top: 0;
    right: 0;
    background-color: var(--modal-bg); /* Dùng biến Modal */
    overflow-x: hidden;
    transition: 0.5s;
    box-shadow: -5px 0 20px rgba(0, 0, 0, 0.25);
    display: flex;
    flex-direction: column;
    color: var(--modal-text); /* Dùng biến Modal */
    border-left: 1px solid var(--input-border); /* Dùng biến Border */
}

    /* Class để hiển thị panel */
    .cart-offcanvas.active {
        width: 380px;
        right: 0; /* Đảm bảo nó hiển thị */
    }

@media screen and (max-width: 600px) {
    .cart-offcanvas.active {
        width: 90%;
    }
}


/* --- Header (cart-header) --- */
.cart-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--input-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--modal-bg);
}

    .cart-header h5 {
        margin: 0;
        font-size: 1.25rem;
        font-weight: 600;
        color: var(--accent-orange);
        letter-spacing: 0.5px;
    }

    .cart-header .close-btn {
        font-size: 2.5rem;
        color: var(--modal-text);
        text-decoration: none;
        line-height: 1;
        opacity: 0.8;
        transition: var(--transition-speed);
        background: none;
        border: none;
        cursor: pointer;
    }

        .cart-header .close-btn:hover {
            color: var(--accent-orange);
            opacity: 1;
            transform: rotate(10deg);
        }

/* --- Body (cart-body) --- */
.cart-body {
    flex-grow: 1;
    padding: 1.5rem;
    overflow-y: auto;
}

    .cart-body p {
        font-style: italic;
        color: #999;
    }

/* --- Footer (cart-footer) --- */
.cart-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--input-border);
    background-color: var(--modal-bg);
    box-shadow: 0 -3px 10px rgba(0, 0, 0, 0.05);
}

    .cart-footer .btn-warning {
        background-image: linear-gradient(to right, var(--accent-orange), var(--accent-yellow), var(--accent-orange));
        font-weight: 700;
        padding: 0.8rem 1rem;
        border-radius: 0.5rem;
        box-shadow: 0 5px 15px rgba(255, 170, 0, 0.3);
        transition: all var(--transition-speed);
        letter-spacing: 1px;
        text-transform: uppercase;
        color: var(--text-main); /* Chữ màu tối trên nền sáng/màu vàng */
        border: none;
        background-size: 200% 100%;
        background-position: 0% 0%;
    }

        .cart-footer .btn-warning:hover {
            background-position: 100% 0%;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255, 170, 0, 0.5);
        }

        .cart-footer .btn-warning:active {
            transform: translateY(0);
            box-shadow: 0 3px 10px rgba(255, 170, 0, 0.3);
        }


/* --- Item trong giỏ hàng --- */
.cart-item {
    display: flex;
    margin-bottom: 1rem;
    padding: 0.75rem;
    border-radius: 0.5rem;
    background-color: var(--card-bg); /* Dùng biến Card */
    border: 1px solid var(--input-border);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.cart-item-info {
    flex-grow: 1;
    padding-left: 10px;
}

    .cart-item-info h6 {
        font-size: 1rem;
        margin-bottom: 0.2rem;
        color: var(--card-text);
    }

    .cart-item-info span {
        font-size: 0.9em;
        color: var(--accent-orange);
        font-weight: 600;
    }

.cart-item img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 0.25rem;
}

.cart-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1040;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
}

    .cart-overlay.active {
        opacity: 1;
        visibility: visible;
    }


/* =======================================
    [11] AUTH MODAL POPUP STYLES
    (Đã dùng biến và hợp nhất các khối modal CSS)
======================================= */

.auth-modal .modal-content {
    border: 1px solid var(--input-border);
    border-radius: 1.5rem;
    background: var(--modal-bg); /* Dùng biến Modal */
    color: var(--modal-text);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1), 0 4px 10px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    transition: all var(--transition-speed);
}

/* Header: Gradient cam ấm áp (Màu cố định không đổi theo dark mode) */
.auth-modal .modal-header {
    color: var(--text-dark);
    border-bottom: none;
    padding: 2rem 2rem 2.5rem;
    font-weight: 700;
    text-shadow: 0 1px 3px rgba(255, 255, 255, 0.5);
    background-image: linear-gradient(135deg, var(--accent-yellow), var(--accent-orange));
    clip-path: polygon(0 0, 100% 0, 100% 85%, 0% 100%);
    border-top-left-radius: 1.5rem;
    border-top-right-radius: 1.5rem;
    justify-content: center;
    position: relative;
    text-align: center;
}

.auth-modal .modal-title {
    font-size: 1.6rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-main); /* Chữ hơi tối */
}

/* Nút Đóng */
.auth-modal .modal-header .btn-close {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    filter: none;
    color: var(--text-main);
    opacity: 0.8;
    transition: all var(--transition-speed);
}

    .auth-modal .modal-header .btn-close:hover {
        opacity: 1;
        transform: rotate(10deg);
    }

.auth-modal .modal-body {
    padding: 2rem;
}

/* --- TÙY CHỈNH THEO LOẠI MODAL (Màu Header) --- */

.modal-login .modal-header {
    background-image: linear-gradient(135deg, var(--accent-yellow), var(--accent-orange));
}

.modal-register .modal-header {
    background-image: linear-gradient(135deg, #a8ff78, #78ffd6);
}

.modal-forgot .modal-header {
    background-image: linear-gradient(135deg, #f0f0f0, #e0e0e0);
    color: var(--text-main) !important;
    text-shadow: none;
    border-bottom: 1px solid #ccc;
}

    .modal-forgot .modal-header .btn-close {
        filter: none;
        color: var(--text-main);
    }

/* --- TÙY CHỈNH NÚT BUTTON --- */

/* Nút Đăng nhập/Quên Mật khẩu (Orange Glow) */
.auth-modal .btn-warning {
    background-image: linear-gradient(to right, var(--accent-orange), var(--accent-yellow), var(--accent-orange));
    font-weight: 700;
    padding: 0.9rem 1.8rem;
    border-radius: 0.75rem;
    box-shadow: 0 0 10px rgba(255, 170, 0, 0.4), 0 5px 15px rgba(0, 0, 0, 0.15);
    transition: all var(--transition-speed);
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-main);
    border: none;
    background-size: 200% 100%;
    background-position: 0% 0%;
}

    .auth-modal .btn-warning:hover {
        background-position: 100% 0%;
        transform: translateY(-3px);
        box-shadow: 0 0 20px rgba(255, 170, 0, 0.7), 0 8px 20px rgba(0, 0, 0, 0.3);
    }

    .auth-modal .btn-warning:active {
        transform: translateY(-1px);
        box-shadow: 0 0 5px rgba(255, 170, 0, 0.4);
    }

/* Nút Đăng ký (Blue/Cyan Glow) */
.auth-modal .btn-success {
    background-image: linear-gradient(to right, #00c6ff, #0072ff, #00c6ff);
    font-weight: 700;
    padding: 0.9rem 1.8rem;
    border-radius: 0.75rem;
    box-shadow: 0 0 10px rgba(0, 198, 255, 0.4), 0 5px 15px rgba(0, 0, 0, 0.15);
    transition: all var(--transition-speed);
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-main);
    border: none;
    background-size: 200% 100%;
    background-position: 0% 0%;
}

    .auth-modal .btn-success:hover {
        background-position: 100% 0%;
        transform: translateY(-3px);
        box-shadow: 0 0 20px rgba(0, 198, 255, 0.7), 0 8px 20px rgba(0, 0, 0, 0.3);
    }

    .auth-modal .btn-success:active {
        transform: translateY(-1px);
        box-shadow: 0 0 5px rgba(0, 198, 255, 0.4);
    }

/* --- INPUT CONTROL (Neumorphism) --- */
.auth-modal .form-control {
    border-radius: 0.75rem;
    padding: 1rem 1.5rem;
    border: none;
    /* Dùng biến cho Input */
    background-color: var(--input-bg);
    color: var(--input-color);
    box-shadow: inset 3px 3px 6px rgba(0, 0, 0, 0.08), inset -3px -3px 6px var(--input-border);
    transition: all var(--transition-speed);
}

    .auth-modal .form-control:focus {
        outline: none;
        background-color: var(--bg-main);
        /* Viền Glow màu cam */
        box-shadow: inset 1px 1px 3px rgba(0, 0, 0, 0.05), inset -1px -1px 3px var(--input-border), 0 0 0 3px rgba(255, 170, 0, 0.3);
    }

/* Điều chỉnh màu viền focus theo từng Modal */
.modal-register .form-control:focus {
    box-shadow: inset 1px 1px 3px rgba(0, 0, 0, 0.05), inset -1px -1px 3px var(--input-border), 0 0 0 3px rgba(0, 198, 255, 0.3);
}

.modal-forgot .form-control:focus {
    box-shadow: inset 1px 1px 3px rgba(0, 0, 0, 0.05), inset -1px -1px 3px var(--input-border), 0 0 0 3px rgba(220, 220, 220, 0.7);
}


/* --- LIÊN KẾT PHỤ --- */
.auth-modal .extra-links {
    margin-top: 25px;
    padding-top: 18px;
    border-top: 1px solid var(--input-border);
    font-size: 0.9em;
    color: var(--modal-text);
}

    .auth-modal .extra-links a {
        color: var(--accent-orange);
        font-weight: 600;
        text-decoration: none;
        transition: color var(--transition-speed);
    }

        .auth-modal .extra-links a:hover {
            color: var(--accent-yellow);
            text-decoration: underline;
        }
/* ===========================
   🌙 DARK MODE STYLES
   =========================== */
body.dark-mode {
    background-color: #121212;
    color: #f1f1f1;
    transition: background-color 0.3s ease, color 0.3s ease;
}

    /* Navbar */
    body.dark-mode .navbar {
        background-color: #1e1e1e !important;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

        body.dark-mode .navbar .nav-link {
            color: #f1f1f1 !important;
        }

            body.dark-mode .navbar .nav-link:hover {
                color: #ffd54f !important;
            }

    /* Buttons, icons */
    body.dark-mode .icon-btn i,
    body.dark-mode .btn-search i {
        color: #ffd54f !important;
    }

    /* Hero section */
    body.dark-mode .hero {
        background-blend-mode: multiply;
        background-color: rgba(0, 0, 0, 0.6);
    }

    body.dark-mode .hero-content h1,
    body.dark-mode .hero-content p {
        color: #fff;
    }

    /* Footer */
    body.dark-mode footer {
        background-color: #1c1c1c;
        color: #ccc;
    }

        body.dark-mode footer a {
            color: #ffd54f;
        }

            body.dark-mode footer a:hover {
                color: #fff;
            }

    /* Cards, modals, offcanvas, panels */
    body.dark-mode .modal-content,
    body.dark-mode .cart-offcanvas {
        background-color: #1e1e1e;
        color: #fff;
    }

    body.dark-mode .form-control {
        background-color: #2a2a2a;
        color: #f1f1f1;
        border: 1px solid #444;
    }

        body.dark-mode .form-control::placeholder {
            color: #bbb;
        }

    /* Search results */
    body.dark-mode .search-result {
        background-color: #1e1e1e;
        color: #f1f1f1;
    }

    /* Loading overlay */
    body.dark-mode #loading-overlay {
        background-color: rgba(0, 0, 0, 0.8);
    }

    /* Scroll top + Messenger buttons */
    body.dark-mode .floating-buttons button,
    body.dark-mode .floating-buttons a {
        background-color: #333;
        border-color: #555;
    }

/* ==========================================================
   1. VARIABLES CHUNG (CẦN THIẾT)
   ========================================================== */
:root {
    /* Màu sắc chung (LIGHT MODE) */
    --primary: #ffb347; /* Cam chủ đạo */
    --background: #f8f9fa; /* Màu nền nhẹ */
    --text-color: #333;
    --card-bg: #fff;
    --shadow-light: 0 4px 10px rgba(0, 0, 0, 0.08);
    --border-color: #e0e0e0;
    --light: #f1f1f1;
}

/* Kích hoạt Dark Mode */
body.dark-mode {
    --primary: #ffb347;
    --background: #121212;
    --text-color: #f1f1f1;
    --card-bg: #1e1e1e;
    --shadow-light: 0 4px 10px rgba(255, 255, 255, 0.08);
    --border-color: #3a3a3a;
    --light: #2c2c2c;
}


/* ==========================================================
   2. ICON BUTTONS (Cart, Account, Theme Toggle)
   ========================================================== */
.icon-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--light);
    border: none;
    color: var(--text-color);
    transition: all 0.2s;
}

body.dark-mode .icon-btn {
    background-color: #2c2c2c;
    color: #f1f1f1;
}

.icon-btn:hover {
    background-color: var(--primary);
    color: white !important;
    box-shadow: 0 2px 5px rgba(255, 179, 71, 0.5);
}


/* ==========================================================
   3. ACCOUNT DROPDOWN STYLES
   ========================================================== */
.dropdown-menu {
    /* Background & Shadow */
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-light);
    /* Layout */
    min-width: 250px;
    padding: 0.5rem 0;
}

/* Tiêu đề nhóm (ví dụ: "Truy cập tài khoản") */
.dropdown-header {
    padding: 0.5rem 1rem;
    font-weight: 600;
    color: var(--primary);
}

/* Các liên kết item */
.dropdown-item {
    padding: 0.5rem 1rem;
    font-size: 0.95rem;
    color: var(--text-color);
    transition: background-color 0.1s;
}

    .dropdown-item:hover {
        background-color: var(--light);
    }

/* Phần hiển thị tên người dùng ("Hi, [Tên]") */
.dropdown-item-text {
    padding: 0.5rem 1rem;
    font-weight: 600;
    color: var(--primary);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0.25rem;
    display: block;
}

body.dark-mode .dropdown-item-text {
    border-bottom: 1px solid #3a3a3a;
}

/* Đường phân cách */
.dropdown-divider {
    border-top: 1px solid var(--border-color);
    margin: 0.25rem 0;
}

body.dark-mode .dropdown-divider {
    border-top: 1px solid #3a3a3a;
}

/* Màu sắc cho nút Admin để nổi bật */
.dropdown-item.text-danger {
    color: #dc3545 !important;
}

    .dropdown-item.text-danger:hover {
        background-color: rgba(220, 53, 69, 0.1);
    }
/* ==================================== */
/* === RECOMMENDED SECTION STYLES (Phần Gợi ý cho bạn) === */
/* ==================================== */

.recommended-section {
    /* Đảm bảo phần này có padding trên/dưới đủ lớn */
    padding-top: 40px;
    padding-bottom: 40px;
}

.recommended-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color, #1a1a1a); /* Sử dụng biến CSS nếu có */
    border-bottom: 3px solid var(--warning, #ffc107);
    display: inline-block;
    padding-bottom: 5px;
    margin-bottom: 30px !important;
}

/* --- Thẻ sách (Card) --- */
.recommended-card {
    border: none;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    overflow: hidden; /* Quan trọng để bo góc và giữ ảnh */
    border-radius: 8px; /* Bo góc card */
    background-color: var(--card-bg-color, #ffffff);
}

    .recommended-card:hover {
        transform: translateY(-5px); /* Hiệu ứng nhấc lên khi hover */
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15) !important; /* Đổ bóng mạnh hơn */
    }

/* --- Container ảnh sách để cố định tỷ lệ (1:1.5 là tỷ lệ bìa sách phổ biến) --- */
.book-image-container {
    width: 100%;
    /* 150% chiều rộng, tương đương tỷ lệ 2:3. Điều chỉnh nếu cần. */
    padding-bottom: 150%;
    position: relative;
    overflow: hidden;
    background-color: #f8f8f8; /* Màu nền khi load ảnh */
    border-bottom: 1px solid #eee;
}

.book-image {
    position: absolute;
    width: 100%;
    height: 100%;
    object-fit: cover; /* Đảm bảo ảnh bao phủ container mà không bị biến dạng */
    transition: transform 0.5s ease;
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
}

.recommended-card:hover .book-image {
    transform: scale(1.05); /* Zoom nhẹ ảnh khi hover */
}

/* --- Card Body & Text Styling --- */
.recommended-card .card-body {
    padding: 15px 10px;
    display: flex; /* Dùng flex để đẩy giá xuống dưới */
    flex-direction: column;
}

.recommended-card .card-title {
    font-size: 1rem;
    color: var(--text-color, #333);
    height: 3rem; /* Cố định chiều cao cho 2 dòng tiêu đề */
    line-height: 1.5rem;
    overflow: hidden;
    margin-bottom: 5px;
}

.recommended-card .text-muted {
    color: var(--text-muted-color, #6c757d) !important;
}

.recommended-card .price {
    font-size: 1.1rem;
    margin-top: 10px !important; /* Tạo khoảng cách với Tác giả */
}

/* --- Card Footer & Button Styling --- */
.recommended-card .card-footer {
    padding: 10px;
    background-color: var(--card-bg-color, #ffffff);
    border-top: none;
}

.recommended-card .btn-outline-primary {
    border-radius: 50px;
    border-width: 2px;
    font-weight: 600;
}

/* ==================================== */
/* === DARK MODE ADJUSTMENTS === */
/* ==================================== */
.dark-mode .recommended-title {
    color: #f8f8f8;
}

.dark-mode .recommended-card {
    background-color: var(--dark-bg-card); /* Ví dụ: #2d3436 */
    box-shadow: 0 4px 10px rgba(255, 255, 255, 0.05) !important;
}

    .dark-mode .recommended-card:hover {
        box-shadow: 0 10px 25px rgba(255, 255, 255, 0.1) !important;
    }

    .dark-mode .recommended-card .card-title {
        color: #f8f8f8;
    }

    .dark-mode .recommended-card .text-muted {
        color: #b0b0b0 !important;
    }

.dark-mode .book-image-container {
    background-color: #444;
}