/* ================= CÀI ĐẶT CHUNG ================= */
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #111;
    color: white;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a { text-decoration: none; color: white; }
main { flex: 1; }

/* ================= HEADER ================= */
header {
    position: sticky;
    top: 0;
    display: flex;
    align-items: center;
    padding: 0 24px;
    height: 58px;
    background: #1a1a1a;
    border-bottom: 2px solid #ff4c4c;
    z-index: 1001;
    gap: 10px;
}

/* ================= LOGO ================= */
.logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    cursor: pointer;
    text-decoration: none;
    margin-right: 6px;
}

.logo-text {
    font-size: 20px;
    font-weight: 900;
    color: white;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-style: italic;
}

.logo-accent { color: #ff4c4c; }

/* ================= HAMBURGER ================= */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    z-index: 1100;
    flex-shrink: 0;
    margin-left: auto;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background: white;
    border-radius: 3px;
    transition: 0.3s;
}

.hamburger.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ================= MENU ================= */
.menu {
    display: flex;
    align-items: center;
    gap: 2px;
    flex-shrink: 0;
}

.menu > a {
    display: inline-block;
    padding: 7px 13px;
    color: white;
    border-radius: 5px;
    transition: 0.2s;
    font-size: 14px;
    white-space: nowrap;
}

.menu > a:hover,
.menu > a.active-page { background: #ff4c4c; }

.menu-auth-mobile { display: none; }

/* ================= DROPDOWN (CHỈ MỞ KHI CLICK) ================= */
.dropdown { position: relative; }

.dropbtn {
    display: inline-block;
    padding: 7px 13px;
    color: white;
    cursor: pointer;
    border-radius: 5px;
    transition: 0.2s;
    font-size: 14px;
    white-space: nowrap;
    user-select: none;
}

.dropbtn:hover,
.dropbtn.open { background: #ff4c4c; }

.dropdown-content {
    display: none;
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    background: #222;
    min-width: 155px;
    border-radius: 8px;
    padding: 5px 0;
    z-index: 2000;
    box-shadow: 0 8px 25px rgba(0,0,0,0.5);
    border: 1px solid #333;
}

.dropdown-content.open { display: block; }

.dropdown-content a {
    display: block;
    padding: 10px 16px;
    color: white;
    font-size: 13px;
    transition: 0.15s;
}

.dropdown-content a:hover { background: #ff4c4c; }

/* ================= SEARCH ================= */
.search { flex: 1; min-width: 0; max-width: 220px; }

.search input {
    width: 100%;
    padding: 7px 12px;
    border-radius: 20px;
    border: 1.5px solid #333;
    background: #111;
    color: white;
    font-size: 13px;
    outline: none;
    transition: border-color 0.2s;
}

.search input:focus { border-color: #ff4c4c; }

/* ================= THEME TOGGLE ================= */
.theme-toggle button {
    font-size: 15px;
    background: #333;
    color: white;
    border: none;
    padding: 7px 10px;
    border-radius: 5px;
    cursor: pointer;
    transition: 0.2s;
    flex-shrink: 0;
}

.theme-toggle button:hover { background: #ff4c4c; }

/* ================= ACCOUNT ================= */
.account {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
    align-items: center;
    margin-left: auto;
}

.btn-login, .btn-register {
    padding: 7px 14px;
    border-radius: 5px;
    font-size: 13px;
    font-weight: bold;
    transition: 0.2s;
    white-space: nowrap;
}

.btn-login { background: #ff4c4c; color: white; }
.btn-login:hover { background: #e03030; }

.btn-register {
    background: transparent;
    color: #ff4c4c;
    border: 1.5px solid #ff4c4c;
}
.btn-register:hover { background: #ff4c4c; color: white; }

/* User info khi đã đăng nhập */
.user-greeting {
    color: #ff4c4c;
    font-weight: bold;
    font-size: 14px;
}

.btn-logout {
    padding: 7px 13px;
    background: #333;
    color: #ccc;
    border-radius: 5px;
    font-size: 13px;
    cursor: pointer;
    border: none;
    transition: 0.2s;
    font-family: inherit;
}

.btn-logout:hover { background: #555; color: white; }

/* ================= BANNER ================= */
.banner {
    width: 100%;
    display: flex;
    justify-content: center;
    padding: 20px 24px 0;
}

.banner img {
    width: 100%;
    max-height: 280px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.5);
}

/* ================= MAIN ================= */
main { padding: 28px 24px; }

.section-title {
    font-size: 17px;
    margin-bottom: 18px;
    color: #eee;
    border-left: 4px solid #ff4c4c;
    padding-left: 12px;
}

/* ================= MANGA LIST ================= */
.manga-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 16px;
}

.manga-link { display: block; }

.manga-card {
    cursor: pointer;
    transition: 0.25s;
    border-radius: 10px;
    overflow: hidden;
    background: #1e1e1e;
    position: relative;
}

.manga-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.manga-info { padding: 8px 10px 10px; }

.manga-title {
    font-size: 13px;
    font-weight: bold;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: #eee;
}

.manga-chapter {
    font-size: 11px;
    color: #888;
    margin-top: 3px;
}

.manga-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
}

/* ================= TRANG LỊCH SỬ / THEO DÕI ================= */
.page-wrap { padding: 28px 24px; flex: 1; }

.page-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 22px;
    flex-wrap: wrap;
    gap: 10px;
}

.page-top h1 {
    font-size: 18px;
    border-left: 4px solid #ff4c4c;
    padding-left: 12px;
    color: #eee;
}

.clear-btn {
    padding: 7px 16px;
    background: #2a2a2a;
    color: #aaa;
    border: 1px solid #444;
    border-radius: 5px;
    font-size: 13px;
    cursor: pointer;
    transition: 0.2s;
    font-family: inherit;
}

.clear-btn:hover { background: #ff4c4c; color: white; border-color: #ff4c4c; }

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #444;
}

.empty-state p { font-size: 15px; margin-bottom: 16px; }

.empty-state a {
    background: #ff4c4c;
    color: white;
    padding: 10px 22px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: bold;
}

.unfollow-btn {
    position: absolute;
    top: 7px;
    right: 7px;
    background: rgba(0,0,0,0.65);
    border: none;
    color: #ff4c4c;
    font-size: 13px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: 0.2s;
    z-index: 2;
    font-family: inherit;
}

.unfollow-btn:hover { background: #ff4c4c; color: white; }

/* ================= MANGA DETAIL ================= */
.manga-detail {
    display: flex;
    gap: 34px;
    padding: 28px;
    max-width: 880px;
    margin: 0 auto;
    background: #1e1e1e;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.4);
}

.detail-img {
    width: 210px;
    border-radius: 10px;
    flex-shrink: 0;
    object-fit: cover;
}

.detail-info { flex: 1; }

.detail-title {
    color: #ff4c4c;
    font-size: 22px;
    margin-bottom: 14px;
}

.detail-info p {
    margin-bottom: 10px;
    font-size: 14px;
    color: #ccc;
    line-height: 1.7;
}

.detail-info p b { color: #ffaa44; }

.tag {
    background: #2a2a2a;
    color: #ccc;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    margin: 3px 3px 3px 0;
    display: inline-block;
    border: 1px solid #444;
}

.follow-btn {
    margin-top: 14px;
    background: #ff4c4c;
    color: white;
    border: none;
    padding: 10px 22px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.2s;
    font-family: inherit;
}

.follow-btn:hover { background: #e03030; }

/* ================= CHAPTER LIST ================= */
.chapter-list {
    max-width: 880px;
    margin: 20px auto;
    background: #1b1b1b;
    padding: 20px;
    border-radius: 12px;
}

.chapter-list h2 {
    margin-bottom: 14px;
    border-left: 4px solid #ff4c4c;
    padding-left: 12px;
    font-size: 16px;
}

.chapters { display: flex; flex-direction: column; gap: 8px; }

.chapter-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: #2a2a2a;
    border-radius: 7px;
    color: white;
    transition: 0.2s;
    font-size: 14px;
}

.chapter-item:hover {
    background: #ff4c4c;
    transform: translateX(4px);
}

/* ================= CHAPTER READER ================= */
.chapter-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-bottom: 80px;
}

.chapter-content img {
    width: 700px;
    max-width: 100%;
    height: auto;
    display: block;
}

.chapter-buttons {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 100;
}

.chapter-buttons button {
    padding: 10px 20px;
    border: none;
    background: #ff4c4c;
    color: white;
    font-size: 14px;
    border-radius: 6px;
    cursor: pointer;
    font-family: inherit;
    transition: 0.2s;
}

.chapter-buttons button:hover { background: #e03030; }

/* ================= COMMENT ================= */
.comment-section {
    max-width: 880px;
    margin: 20px auto;
    padding: 22px;
    background: #1a1a1a;
    border-radius: 12px;
}

.comment-section h2 {
    margin-bottom: 16px;
    border-left: 4px solid #ff4c4c;
    padding-left: 12px;
    font-size: 16px;
}

.comment-input { display: flex; flex-direction: column; gap: 10px; margin-bottom: 20px; }

.comment-input input,
.comment-input textarea {
    background: #111;
    color: white;
    border: 1.5px solid #333;
    border-radius: 7px;
    padding: 10px 12px;
    font-size: 14px;
    outline: none;
    font-family: inherit;
    transition: border-color 0.2s;
}

.comment-input input { width: 220px; }
.comment-input textarea { width: 100%; height: 100px; resize: none; }
.comment-input input:focus,
.comment-input textarea:focus { border-color: #ff4c4c; }

.comment-input button {
    align-self: flex-start;
    padding: 9px 20px;
    background: #ff4c4c;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-family: inherit;
    transition: 0.2s;
}

.comment-input button:hover { background: #e03030; }

.comment {
    background: #222;
    padding: 12px 16px;
    margin-top: 10px;
    border-radius: 8px;
    border-left: 3px solid #ff4c4c;
}

.comment-name { font-weight: bold; color: #ff8888; margin-bottom: 5px; font-size: 13px; }
.comment-text { color: #ddd; line-height: 1.5; font-size: 14px; }

/* ================= FOOTER ================= */
footer {
    background: #1a1a1a;
    text-align: center;
    padding: 16px;
    color: #555;
    font-size: 13px;
    border-top: 1px solid #222;
    margin-top: auto;
}

/* ================= LIGHT MODE ================= */
.light-mode { background: #f2f2f2; color: #111; }
.light-mode header { background: #fff; border-bottom: 2px solid #ff4c4c; }
.light-mode .menu > a { color: #333; }
.light-mode .menu > a:hover,
.light-mode .menu > a.active-page { background: #ff4c4c; color: white; }
.light-mode .dropbtn { color: #333; }
.light-mode .dropdown-content { background: #fff; border: 1px solid #ddd; }
.light-mode .dropdown-content a { color: #333; }
.light-mode .dropdown-content a:hover { background: #ff4c4c; color: white; }
.light-mode .manga-card { background: #fff; box-shadow: 0 2px 8px rgba(0,0,0,0.1); }
.light-mode .manga-title { color: #222; }
.light-mode .theme-toggle button { background: #eee; color: #333; }
.light-mode .search input { background: #eee; color: #333; border-color: #ccc; }
.light-mode footer { background: #fff; border-top: 1px solid #ddd; color: #888; }
.light-mode .chapter-list,
.light-mode .manga-detail,
.light-mode .comment-section { background: #fff; box-shadow: 0 2px 12px rgba(0,0,0,0.08); }
.light-mode .chapter-item { background: #f5f5f5; color: #333; }
.light-mode .comment { background: #f5f5f5; }
.light-mode .comment-input input,
.light-mode .comment-input textarea { background: #f5f5f5; color: #333; border-color: #ccc; }
.light-mode .clear-btn { background: #eee; color: #555; border-color: #ccc; }
.light-mode .tag { background: #eee; color: #555; border-color: #ccc; }

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 768px) {

    header { padding: 0 14px; position: relative; flex-wrap: wrap; height: auto; min-height: 56px; }

    .hamburger { display: flex; margin-left: auto; }
    .account { display: none; }
    .search {
        order: 10;
        width: 100%;
        max-width: 100%;
        flex: none;
        padding: 8px 0 10px;
    }

    .menu {
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #1a1a1a;
        border-top: 2px solid #ff4c4c;
        z-index: 1050;
        padding: 6px 0;
    }

    .menu.open { display: flex; }

    .menu > a {
        padding: 13px 20px;
        border-radius: 0;
        border-bottom: 1px solid #252525;
        font-size: 15px;
    }

    .dropdown { width: 100%; }

    .dropbtn {
        display: block;
        padding: 13px 20px;
        border-radius: 0;
        border-bottom: 1px solid #252525;
        font-size: 15px;
    }

    .dropdown-content {
        position: static;
        box-shadow: none;
        border: none;
        border-radius: 0;
        background: #222;
        width: 100%;
        padding: 0;
    }

    .dropdown-content a {
        padding: 11px 35px;
        font-size: 14px;
        border-bottom: 1px solid #2a2a2a;
    }

    .menu-auth-mobile {
        display: flex;
        gap: 10px;
        padding: 12px 16px;
        border-top: 1px solid #2a2a2a;
    }

    .btn-login-mobile, .btn-register-mobile {
        flex: 1;
        text-align: center;
        padding: 10px;
        border-radius: 7px;
        font-weight: bold;
        font-size: 14px;
        transition: 0.2s;
    }

    .btn-login-mobile { background: #ff4c4c; color: white; }
    .btn-register-mobile { background: transparent; color: #ff4c4c; border: 1.5px solid #ff4c4c; }

    .banner { padding: 12px 14px 0; }
    .banner img { border-radius: 8px; max-height: 160px; }

    main { padding: 16px 14px; }
    .page-wrap { padding: 16px 14px; }
    .section-title { font-size: 15px; }

    .manga-list { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .manga-card img { height: 170px; }

    .manga-detail { flex-direction: column; align-items: center; padding: 18px 14px; gap: 18px; }
    .detail-img { width: 150px; }
    .detail-title { font-size: 18px; }

    .chapter-list { margin: 14px; padding: 16px; }
    .comment-section { margin: 14px; padding: 16px; }

    .chapter-buttons { bottom: 12px; }
    .chapter-buttons button { padding: 9px 16px; font-size: 13px; }
}

@media (max-width: 400px) {
    .manga-list { gap: 8px; }
    .manga-card img { height: 148px; }
}

/* ===== ALIAS / MISSING CLASSES ===== */
/* .header = header tag */
.header { /* alias - dung tag header */ }

/* .auth-page - trang dang nhap */
.auth-page {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px 20px;
}

/* .reader-controls */
.reader-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 20px;
    background: #161616;
    border-bottom: 1px solid #1e1e1e;
    gap: 10px;
    flex-wrap: wrap;
    position: sticky;
    top: 58px;
    z-index: 100;
}

.reader-title {
    font-size: 14px;
    color: #ccc;
    font-weight: bold;
    flex: 1;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.reader-title span { color: #ff4c4c; }

.reader-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.nav-btn {
    padding: 7px 16px;
    background: #2a2a2a;
    color: #ccc;
    border: 1px solid #333;
    border-radius: 5px;
    font-size: 13px;
    cursor: pointer;
    transition: 0.2s;
    font-family: inherit;
    white-space: nowrap;
    text-decoration: none;
    display: inline-block;
}

.nav-btn:hover:not([disabled]) { background: #ff4c4c; color: white; border-color: #ff4c4c; }
.nav-btn[disabled] { opacity: 0.3; cursor: not-allowed; pointer-events: none; }

.reader-bottom {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 24px 20px;
    background: #161616;
    border-top: 1px solid #222;
}

.reader-images {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: #0d0d0d;
}

.reader-images img {
    width: 720px;
    max-width: 100%;
    display: block;
    margin: 0 auto;
}

/* .breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: #161616;
    border-bottom: 1px solid #222;
    font-size: 13px;
    color: #666;
    flex-wrap: wrap;
}

.breadcrumb a { color: #999; transition: color 0.2s; }
.breadcrumb a:hover { color: #ff4c4c; }
.breadcrumb .sep { color: #444; }
.breadcrumb .current { color: #ff4c4c; font-weight: bold; }

/* Chapter select popup */
.chapter-select-wrap { position: relative; }

.chapter-select-btn {
    padding: 7px 14px;
    background: #222;
    color: #ccc;
    border: 1px solid #333;
    border-radius: 5px;
    font-size: 13px;
    cursor: pointer;
    transition: 0.2s;
    font-family: inherit;
}

.chapter-select-btn:hover { background: #333; color: white; }

.chapter-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    background: #1e1e1e;
    border: 1px solid #333;
    border-radius: 8px;
    min-width: 180px;
    z-index: 500;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0,0,0,0.6);
}

.chapter-dropdown.open { display: block; }

.chapter-dropdown a {
    display: block;
    padding: 11px 16px;
    color: #ccc;
    font-size: 13px;
    transition: 0.15s;
    border-bottom: 1px solid #252525;
}

.chapter-dropdown a:last-child { border-bottom: none; }
.chapter-dropdown a:hover { background: #ff4c4c; color: white; }
.chapter-dropdown a.active { color: #ff4c4c; font-weight: bold; }

/* Light mode reader */
.light-mode .breadcrumb { background: #f5f5f5; border-bottom: 1px solid #ddd; color: #999; }
.light-mode .breadcrumb a { color: #666; }
.light-mode .reader-controls { background: #f5f5f5; border-bottom: 1px solid #ddd; }
.light-mode .reader-images { background: #e8e8e8; }
.light-mode .reader-bottom { background: #f5f5f5; border-top: 1px solid #ddd; }
.light-mode .nav-btn { background: #eee; color: #333; border-color: #ccc; }
.light-mode .chapter-select-btn { background: #eee; color: #333; border-color: #ccc; }
.light-mode .chapter-dropdown { background: #fff; border-color: #ddd; }
.light-mode .chapter-dropdown a { color: #333; border-color: #eee; }

/* Reader responsive */
@media (max-width: 768px) {
    .reader-controls { top: 56px; padding: 8px 12px; }
    .reader-title { font-size: 12px; }
    .nav-btn { padding: 7px 10px; font-size: 12px; }
    .chapter-dropdown { left: auto; right: 0; transform: none; }
    .breadcrumb { padding: 10px 14px; font-size: 12px; }
    .reader-bottom { gap: 6px; padding: 16px 12px; }
    .reader-bottom .nav-btn { padding: 9px 12px; font-size: 12px; }
}