/* ===========================================================================
   CheckIQFree — site.css
   Thay cho khoi CSS inline trong master.blade.php.

   Dat tai:  public/css/site.css
   Phuc vu :  https://checkiqfree.com/css/site.css

   Giu nguyen bang mau cu: navy #1e3a8a, vang #ffc43a.
   Sua 4 loi nang cua ban cu:
     1. body { text-align:center } — khien toan bo bai viet dai kho doc
     2. font-family 'Inter' duoc khai bao nhung khong bao gio duoc tai
     3. 21KB CSS inline, khong cache duoc, chan render moi lan tai trang
     4. Menu mobile dung hack  right:-124px  va  top:13%
   =========================================================================== */

/* ---------------------------------------------------------------- tokens */
:root{
    --ink:#10193a;
    --ink-soft:#4a5578;
    --navy:#1e3a8a;
    --navy-deep:#16296b;
    --paper:#f7f8fb;
    --surface:#ffffff;
    --signal:#ffc43a;
    --signal-deep:#d9a428;
    --band:#dbe3f5;
    --rule:#e3e7f0;

    --sans:'Space Grotesk',system-ui,-apple-system,'Segoe UI',sans-serif;
    --serif:'Source Serif 4',Georgia,'Times New Roman',serif;

    --wrap:1160px;
    /* Dung rem chu KHONG dung ch: don vi ch phu thuoc co chu cua chinh phan tu,
       nen 70ch tren <h2> co 32px se ra ~1400px va max-width mat tac dung.
       44rem = 704px, tuong duong 70ch o co chu goc 17px. */
    --read:46rem;   /* cot chu: ~82 ky tu/dong */
    --wide:64rem;   /* bang, anh, luoi duoc tran rong hon cot chu */
    --r:14px;
}

*,*::before,*::after{box-sizing:border-box}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){
    html{scroll-behavior:auto}
    *{animation-duration:.01ms!important;transition-duration:.01ms!important}
}

body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:var(--sans);
    font-size:17px;
    line-height:1.65;
    /* KHONG text-align:center — day la loi lon nhat cua ban cu */
}

h1,h2,h3,h4{font-family:var(--sans);line-height:1.18;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(1.95rem,4.6vw,3rem);font-weight:700}
h2{font-size:clamp(1.4rem,3vw,2rem);font-weight:700;margin-top:1.6em}
h3{font-size:clamp(1.15rem,2.2vw,1.35rem);font-weight:600;margin-top:1.4em}
h4{font-size:1.05rem;font-weight:600}
p{margin:0 0 1.05em}
img{max-width:100%;height:auto}

a{color:var(--navy);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--navy-deep)}

:focus-visible{outline:3px solid var(--signal);outline-offset:3px;border-radius:4px}

/* ============================================================== HEADER */
header{background:var(--navy);color:#fff;position:sticky;top:0;z-index:900}

.nav-container{
    max-width:var(--wrap);margin:0 auto;padding:0 20px;
    height:64px;display:flex;align-items:center;gap:24px;
}

.logo{flex-shrink:0;display:flex;align-items:center}
.logo img,img.logo{height:38px;max-width:150px;width:auto;display:block}
.logo a{display:flex;align-items:center;text-decoration:none}

.menu-toggle{
    display:none;margin-left:auto;cursor:pointer;font-size:1.2rem;color:#fff;
    width:42px;height:42px;line-height:42px;text-align:center;
    border:1px solid rgba(255,255,255,.3);border-radius:10px;
}

nav ul{list-style:none;display:flex;align-items:center;gap:2px;margin:0 0 0 auto;padding:0}
nav ul li{position:relative}
nav ul li a{
    color:#dbe3f5;text-decoration:none;font-size:.94rem;font-weight:500;
    padding:9px 12px;border-radius:8px;display:flex;align-items:center;gap:6px;
    transition:background .16s,color .16s;white-space:nowrap;
}
nav ul li a:hover{background:rgba(255,255,255,.11);color:#fff}
.dropdown-icon{
    flex-shrink:0;opacity:.7;margin-left:1px;
    transition:transform .18s ease,opacity .18s ease;
}
nav ul li:hover>a .dropdown-icon,
nav ul li:focus-within>a .dropdown-icon{opacity:1;transform:rotate(180deg)}

/* submenu */
nav ul ul{
    display:none;position:absolute;top:100%;left:0;flex-direction:column;gap:0;
    background:var(--surface);min-width:230px;padding:6px;margin:0;
    border:1px solid var(--rule);border-radius:12px;
    box-shadow:0 12px 30px rgba(16,25,58,.14);z-index:1000;
}
nav ul ul li{width:100%}
nav ul ul li a{color:var(--ink);padding:10px 13px;border-radius:8px;font-weight:500}
nav ul ul li a:hover{background:#eef2fb;color:var(--navy)}
nav ul li:hover>ul,nav ul li:focus-within>ul{display:flex}

@media(max-width:1024px){
    .menu-toggle{display:block}
    nav ul{
        position:fixed;top:64px;left:0;right:0;
        flex-direction:column;align-items:stretch;gap:0;
        background:var(--navy-deep);padding:8px;margin:0;
        max-height:0;overflow:hidden;transition:max-height .28s ease;
    }
    nav ul.show,nav ul#navMenu.show{max-height:calc(100vh - 64px);overflow-y:auto}
    nav ul li{width:100%}
    nav ul li a{padding:14px 16px;border-radius:10px;font-size:1rem}
    nav ul ul{
        position:static;display:none;background:rgba(255,255,255,.06);
        border:0;box-shadow:none;border-radius:8px;margin:2px 0 6px;padding:4px;
    }
    nav ul li.active>ul{display:flex}
    nav ul li:hover>ul{display:none}
    nav ul li:hover>a .dropdown-icon{transform:none;opacity:.7}
    nav ul li.active>a .dropdown-icon{transform:rotate(180deg);opacity:1}
    nav ul li.has-submenu>a{justify-content:space-between}
    nav ul li.active>ul li a{color:#dbe3f5;padding-left:28px}
    nav ul li.active>ul li a:hover{background:rgba(255,255,255,.1);color:#fff}
}

/* ============================================================== LAYOUT */
.hero,.test-section,.testimonials,.faq,.blog-container{
    max-width:var(--wrap);margin-inline:auto;padding:38px 20px;
}
.hero{padding-top:46px;padding-bottom:24px}
.hero h1{margin-bottom:.35em}
.hero p,.hero-sub{
    font-family:var(--serif);font-size:1.1rem;color:var(--ink-soft);
    max-width:var(--read);
}
.hero h1{max-width:var(--read)}
.hero nav{background:none;position:static}

/* .breadcrumb luon nam BEN TRONG .hero (ca 21 trang), ma .hero da co
   max-width + padding roi. Neu them lop khung nua thi padding cong don
   -> breadcrumb thut vao 40px trong khi <h1> o 20px. */
.breadcrumb{
    font-size:.86rem;color:var(--ink-soft);margin:0 0 14px;
}
.breadcrumb a{color:var(--navy);text-decoration:none}
.breadcrumb a:hover{text-decoration:underline}

/* noi dung bai viet — cot hep, can trai, font serif */
.content_detail{max-width:var(--read);margin-inline:0}
.content_detail p,.content_detail li{
    font-family:var(--serif);font-size:1.08rem;line-height:1.74;color:#263156;
}
.content_detail ul,.content_detail ol{padding-left:1.3em}
.content_detail li{margin-bottom:.45em}
.content_detail img{border-radius:10px;display:block;margin:26px 0}

/* Cho bang va anh TRAN RONG hon cot chu: dung het khong gian man hinh lon
   ma van giu do dai dong chu o muc de doc. */
.content_detail>table,
.content_detail>figure,
.content_detail>img{
    max-width:min(var(--wide),100%);
}
.content_detail>table{width:100%;display:block;overflow-x:auto}
.content_detail table{
    width:100%;border-collapse:collapse;margin:26px 0;font-size:.95rem;
    font-family:var(--sans);display:block;overflow-x:auto;
}
.content_detail th,.content_detail td{
    border:1px solid var(--rule);padding:11px 13px;text-align:left;
}
.content_detail th{background:#eef2fb;font-weight:600;color:var(--navy)}
.content_detail blockquote{
    border-left:3px solid var(--signal);margin:26px 0;padding:2px 0 2px 20px;
    font-family:var(--sans);font-size:1.1rem;font-weight:500;color:var(--ink);
}
.page-author,.blog-author-note{
    font-size:.9rem;color:var(--ink-soft);border-top:1px solid var(--rule);
    padding-top:16px;margin-top:32px;
}

/* ============================================================== BUTTONS */
.test-buttons{margin:26px 0;display:flex;gap:12px;flex-wrap:wrap}
.test-buttons a{text-decoration:none}
button,.disc1,.disc3,.disc4,#start-btn,#submit-btn,#submit-info{
    font-family:var(--sans);font-size:1rem;font-weight:700;
    background:var(--signal);color:var(--ink);border:none;
    padding:15px 28px;border-radius:11px;cursor:pointer;
    box-shadow:0 2px 0 var(--signal-deep);
    transition:transform .13s,box-shadow .13s,background .13s;
}
button:hover,.disc1:hover,#start-btn:hover,#submit-btn:hover,#submit-info:hover{
    background:#ffd66b;transform:translateY(-2px);box-shadow:0 4px 0 var(--signal-deep);
}
button:active{transform:translateY(1px);box-shadow:0 1px 0 var(--signal-deep)}
button[disabled]{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}

/* ============================================================== QUIZ */
#quiz-container,#result,#user-info-form{
    max-width:760px;margin:26px auto;background:var(--surface);
    padding:30px 26px;border-radius:var(--r);border:1px solid var(--rule);
    box-shadow:0 1px 3px rgba(16,25,58,.05);
}
#user-info-form{max-width:660px}
#user-info-form input,#user-info-form select{
    width:100%;padding:13px 15px;margin:8px 0;font-family:var(--sans);font-size:1rem;
    border:1.5px solid var(--rule);border-radius:10px;background:#fff;color:var(--ink);
}
#user-info-form input:focus,#user-info-form select:focus{
    outline:none;border-color:var(--navy);
}

.question{margin-bottom:18px}
.question h3{font-size:1.2rem;font-weight:600;margin:0 0 16px;color:var(--ink);text-align:left}
.question p,.question ul{text-align:left}
.question .question-img{
    width:100%;max-width:430px;height:auto;display:block;margin:0 auto 22px;
}

.option{
    display:inline-block;width:calc(33.33% - 10px);vertical-align:top;
    background:#fbfcfe;border:1.5px solid var(--rule);border-radius:11px;
    padding:15px 10px;margin:5px;text-align:center;cursor:pointer;
    font-family:var(--sans);font-size:1.08rem;font-weight:600;color:var(--ink);
    font-variant-numeric:tabular-nums;transition:all .14s;
}
.option:hover{border-color:var(--navy);background:#fff}
.option.selected{background:var(--navy);border-color:var(--navy);color:#fff}

.iq-advice{
    background:#fbfcfe;border:1px solid var(--rule);border-radius:12px;
    padding:20px;margin-top:24px;text-align:left;
}
.iq-advice h3{margin-top:0}

@media(max-width:620px){
    .option{width:calc(50% - 10px);font-size:1rem;padding:14px 8px}
    #quiz-container,#result,#user-info-form{padding:22px 16px}
}

/* ============================================================== FAQ */
.faq-item{
    background:var(--surface);border:1px solid var(--rule);border-radius:12px;
    padding:18px 20px;margin-bottom:12px;max-width:var(--read);
    margin-inline:0;
}
.faq-question{margin:0;font-size:1.06rem;font-weight:600;cursor:pointer;color:var(--ink)}
.faq-answer{margin-top:10px}
.faq-answer p{font-family:var(--serif);color:var(--ink-soft);margin:0}

/* ============================================================== BLOG */
/* Luoi bai viet.
   Ba kieu long khac nhau trong cac file view:
     A) .blog-container > .blog-post            (blog, careers, iq-guides...)
     B) .blog-container > .blog-grid > .blog-post (celebrity_iq, recruitment_iq)
     C) .blog-container > h2 + .blog-post        (index)
   Nen chinh .blog-container la luoi, va cho cac phan tu "toan chieu ngang"
   trai het cac cot. Khong dung :has() de khong phu thuoc trinh duyet. */
.blog-container,.blog-grid,.list-blog{
    display:grid;
    grid-template-columns:repeat(auto-fill,minmax(270px,1fr));
    gap:20px;
    align-items:stretch;
}
.blog-container>h2,.blog-container>h3,.blog-container>p,
.blog-container>.content_detail,.blog-container>.blog-grid,
.blog-container>.list-blog,.blog-container>.pagination,
.blog-container>section,.blog-container>.breadcrumb,
.blog-grid>h2,.list-blog>h2{
    grid-column:1 / -1;
}
.blog-post{
    background:var(--surface);border:1px solid var(--rule);border-radius:var(--r);
    overflow:hidden;display:flex;flex-direction:column;
    transition:transform .16s,box-shadow .16s,border-color .16s;
}
.blog-post:hover{
    transform:translateY(-3px);border-color:var(--navy);
    box-shadow:0 10px 26px rgba(30,58,138,.1);
}
.blog-post img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block}
.blog-content{padding:18px;display:flex;flex-direction:column;flex:1}
.blog-content h3,.blog-content h2{margin:0 0 8px;font-size:1.08rem;line-height:1.35}
.blog-content h3 a,.blog-content h2 a{text-decoration:none;color:var(--ink)}
.blog-content h3 a:hover,.blog-content h2 a:hover{color:var(--navy)}
.blog-content p{
    font-family:var(--serif);font-size:.95rem;color:var(--ink-soft);
    text-align:left;margin:0 0 12px;
}
.blog-date{
    margin-top:auto;font-size:.8rem;color:var(--ink-soft);
    padding-top:12px;border-top:1px solid var(--rule);
}

/* ============================================================== SHARE */
.share-box{
    max-width:var(--read);margin:34px 0;padding:18px 20px;
    background:var(--surface);border:1px solid var(--rule);border-radius:12px;
    display:flex;align-items:center;gap:10px;flex-wrap:wrap;
}
.share-label{font-size:.86rem;font-weight:700;color:var(--ink-soft);margin-right:4px}
.share-btn{
    display:inline-block;padding:8px 15px;border-radius:8px;
    font-size:.84rem;font-weight:600;text-decoration:none;color:#fff;
    transition:opacity .15s;
}
.share-btn:hover{opacity:.85;color:#fff}
.share-btn.fb{background:#1877f2}
.share-btn.tw{background:#0f1419}
.share-btn.ln{background:#0a66c2}
.share-btn.rd{background:#ff4500}
.share-btn.pt{background:#bd081c}
.share-btn.wa{background:#25d366}

/* ============================================================== COMMENTS */
.comment-left{float:none;margin-right:14px}
.comment-left .avatar{
    width:44px;height:44px;border-radius:50%;object-fit:cover;background:var(--band);
}
.comment-right{overflow:hidden}
.comment-header{display:flex;gap:10px;align-items:baseline;flex-wrap:wrap}
.comment-author{font-weight:700;color:var(--ink)}
.comment-date{font-size:.8rem;color:var(--ink-soft)}
.comment-text{font-family:var(--serif);color:#263156;margin-top:4px}

/* ============================================================== TESTIMONIALS */
.testimonial-list{
    display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px;
}
.testimonial-item{
    background:var(--surface);border:1px solid var(--rule);border-radius:12px;padding:20px;
}
.testimonial-item p{font-family:var(--serif);color:#263156;margin:0 0 10px}
.testimonial-item span{font-size:.85rem;color:var(--ink-soft);font-weight:600}

/* ============================================================== RANKING */
.ranking-title{text-align:center;margin-bottom:22px}
.ranking-table{
    width:100%;border-collapse:collapse;font-family:var(--sans);font-size:.95rem;
    background:var(--surface);border:1px solid var(--rule);border-radius:12px;overflow:hidden;
}
.ranking-table th,.ranking-table td{
    padding:12px 14px;text-align:left;border-bottom:1px solid var(--rule);
}
.ranking-table th{background:#eef2fb;color:var(--navy);font-weight:700;font-size:.8rem;
    letter-spacing:.06em;text-transform:uppercase}
.ranking-table tr:last-child td{border-bottom:0}
.ranking-table td:last-child{font-variant-numeric:tabular-nums;font-weight:700}

/* ============================================================== PAGINATION */
.pagination{
    list-style:none;display:flex;justify-content:center;flex-wrap:wrap;
    gap:6px;padding:0;margin:36px 0;
}
.page-item{margin:0}
.page-link,.page-number{
    display:block;padding:9px 14px;border-radius:9px;text-decoration:none;
    border:1.5px solid var(--rule);background:var(--surface);color:var(--navy);
    font-size:.92rem;font-weight:600;font-variant-numeric:tabular-nums;transition:.15s;
}
a.page-link:hover{border-color:var(--navy);background:#eef2fb}
.page-item.active .page-link,.page-item.active .page-number{
    background:var(--navy);border-color:var(--navy);color:#fff;
}
.page-item.disabled .page-link,.page-item.disabled .page-number{
    opacity:.4;cursor:not-allowed;
}

/* ============================================================== FOOTER */
footer{background:var(--navy);color:#c3cfeb;margin-top:56px;padding:38px 20px 26px}
.footer-container{max-width:var(--wrap);margin:0 auto;text-align:center}
.footer-links{
    list-style:none;display:flex;justify-content:center;flex-wrap:wrap;
    gap:8px 22px;padding:0;margin:0 0 18px;
}
.footer-links a{color:#dbe3f5;text-decoration:none;font-size:.9rem}
.footer-links a:hover{color:#fff;text-decoration:underline}
.footer-container p{font-size:.85rem;margin:0 0 14px;color:#a9b8dc}
.dmca-badge img{height:26px;width:auto;opacity:.85}

/* ============================================================== UTILITIES */
/* Bo cuc hai cot cho trang bai viet (chi tren man hinh >= 1080px).
   Cot chinh giu do rong de doc, cot phu chua muc luc + o quang cao. */
.article-layout{
    display:grid;
    grid-template-columns:minmax(0,var(--read)) minmax(240px,300px);
    gap:44px;
    align-items:start;
}
.article-layout>.article-main{min-width:0}
.article-main>.content_detail,
.article-main>.references,
.article-main>.article-author,
.article-main>.share-box,
.article-main>.comment-container{max-width:none;margin-inline:0}
.article-side{position:sticky;top:84px;display:grid;gap:18px}
.article-side .side-box{
    background:var(--surface);border:1px solid var(--rule);
    border-radius:var(--r);padding:18px;
}
.article-side h4{
    margin:0 0 12px;font-size:.74rem;letter-spacing:.11em;
    text-transform:uppercase;color:var(--ink-soft);
}
.toc-list{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.toc-list a{
    display:block;padding:7px 10px;border-radius:8px;text-decoration:none;
    font-size:.88rem;line-height:1.35;color:var(--ink-soft);
    border-left:2px solid transparent;
}
.toc-list a:hover{background:#eef2fb;color:var(--navy)}
.toc-list a.active{
    background:#eef2fb;color:var(--navy);font-weight:600;border-left-color:var(--signal);
}
.toc-list li.lvl3 a{padding-left:22px;font-size:.84rem}
.side-ad{min-height:250px;display:flex;align-items:center;justify-content:center}
/* Cot phu tu co lai theo noi dung: khong con o quang cao thu cong thi
   khong de lai khoang trong. */
.article-side:empty{display:none}
.article-side .side-box:empty{display:none}
@media(max-width:1079px){
    .article-layout{grid-template-columns:1fr;gap:0}
    .article-side{position:static;margin-top:32px}
}

/* Moi thanh phan truc tiep trong .test-section dung CHUNG mot cot rong
   --read, de mep trai thang hang. Truoc day chi <p> va <h2> bi gioi han
   con .ranking-profile trai het 1160px -> lech nhau ~230px. */
.test-section>h2,.test-section>h3,.test-section>h4,
.test-section>p,.test-section>ul,.test-section>ol,
.test-section>table,.test-section>.ranking-profile,
.test-section>.faq-item,.test-section>.references,
.test-section>div:not(.content_detail):not(.blog-grid):not(.list-blog):not(.article-layout){
    max-width:var(--read);
    margin-inline:0;          /* can TRAI, thang hang voi <h1> cua .hero */
}
.test-section>p{font-family:var(--serif);color:var(--ink-soft)}
.test-section>ul,.test-section>ol{font-family:var(--serif);color:#263156}

/* Luoi anh chan dung trong cot hep -> o nho lai cho vua */
.test-section>.ranking-profile{
    grid-template-columns:repeat(auto-fill,minmax(120px,1fr));
}

@media(max-width:768px){
    body{font-size:16px}
    .hero,.test-section,.testimonials,.faq,.blog-container{padding:28px 16px}
    .content_detail p,.content_detail li{font-size:1.04rem}
}

/* nut CTA tren thanh dieu huong */
nav ul li a.nav-cta{
    background:var(--signal);color:var(--ink);font-weight:700;
}
nav ul li a.nav-cta:hover{background:#ffd66b;color:var(--ink)}
@media(max-width:1024px){
    nav ul li a.nav-cta{justify-content:center;margin-top:4px}
}

/* khu vuc bai test: an truoc khi bam Start, JS se hien */
.test-quiz{display:none}
nav ul li.has-submenu>a{cursor:pointer}

/* ===========================================================================
   PHAN BO SUNG — thay cho 146KB CSS vun vat trong tung file view
   =========================================================================== */

/* --- "Read more" (9 trang) ------------------------------------------- */
.read-more{
    display:inline-flex;align-items:center;gap:6px;
    font-size:.88rem;font-weight:600;text-decoration:none;color:var(--navy);
    margin-top:auto;padding-top:10px;
}
.read-more::after{content:"\2192";transition:transform .16s}
.read-more:hover::after{transform:translateX(3px)}

/* --- Luoi chan dung (celebrity_iq, high_iq, index) -------------------- */
.ranking-profile{
    display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));
    gap:16px;margin:26px 0;
}
.profile{
    background:var(--surface);border:1px solid var(--rule);border-radius:12px;
    padding:16px 12px;text-align:center;transition:border-color .16s,transform .16s;
}
.profile:hover{border-color:var(--navy);transform:translateY(-2px)}
.profile img{
    width:76px;height:76px;border-radius:50%;object-fit:cover;
    margin:0 auto 10px;display:block;background:var(--band);
}
.profile p{margin:0;font-size:.92rem;line-height:1.35}
.profile p:first-of-type{font-weight:600;color:var(--ink)}
.profile p:last-child{
    color:var(--navy);font-weight:700;font-variant-numeric:tabular-nums;margin-top:3px;
}

/* --- Trang lien he ---------------------------------------------------- */
.contact-wrapper{
    display:grid;grid-template-columns:1fr 1.1fr;gap:30px;
    max-width:var(--wrap);margin:0 auto;align-items:start;
}
@media(max-width:820px){.contact-wrapper{grid-template-columns:1fr}}
.contact-info,.contact-form{
    background:var(--surface);border:1px solid var(--rule);
    border-radius:var(--r);padding:26px;
}
.contact-info h2{margin-top:0}
.contact-info p,.contact-info li{font-family:var(--serif);color:var(--ink-soft)}
.contact-info ul{list-style:none;padding:0;margin:16px 0 0;display:grid;gap:10px}
.form-group{margin-bottom:16px}
.form-group label{
    display:block;font-size:.85rem;font-weight:600;color:var(--ink-soft);margin-bottom:6px;
}
.form-group input,.form-group textarea,.form-group select{
    width:100%;padding:12px 14px;font-family:var(--sans);font-size:1rem;
    border:1.5px solid var(--rule);border-radius:10px;background:#fbfcfe;color:var(--ink);
}
.form-group input:focus,.form-group textarea:focus{
    outline:none;border-color:var(--navy);background:#fff;
}
.form-group textarea{min-height:130px;resize:vertical}
.btn-submit{width:100%}

/* --- Khoi nha xuat ban cuoi bai --------------------------------------- */
.article-author{
    background:var(--surface);border:1px solid var(--rule);border-radius:var(--r);
    padding:24px;margin:36px 0 0;max-width:var(--read);
}
.article-author h4{
    margin:0 0 12px;font-size:.76rem;letter-spacing:.11em;text-transform:uppercase;
    color:var(--ink-soft);
}
.author-info p{font-family:var(--serif);font-size:.98rem;color:#263156}
.author-info p:last-of-type{margin-bottom:0}
.author-links{
    list-style:none;padding:14px 0 0;margin:14px 0 0;
    border-top:1px solid var(--rule);display:grid;gap:7px;font-size:.9rem;
}
.author-photo{
    width:84px;height:84px;border-radius:50%;object-fit:cover;
    float:left;margin:0 18px 10px 0;
}

/* --- Nguon tham khao --------------------------------------------------- */
.references{
    max-width:var(--read);margin:40px 0 0;padding-top:22px;
    border-top:1px solid var(--rule);
}
.references h2{font-size:1.15rem;margin:0 0 12px}
.references ul{list-style:none;padding:0;margin:0;display:grid;gap:9px}
.references li,.test-section .references li{padding-left:0;font-size:.9rem;color:var(--ink-soft)}
.references li::before,.test-section .references li::before{content:none}
.references a{word-break:break-word}

/* --- Binh luan --------------------------------------------------------- */
.comment-container{max-width:var(--read);margin:40px 0 0}
.comment-title,.add-comment-title{font-size:1.2rem;margin:0 0 18px}
.comment-item{
    background:var(--surface);border:1px solid var(--rule);border-radius:12px;
    padding:18px;margin-bottom:12px;display:flex;gap:14px;
}
.comment-actions{margin-top:10px;display:flex;gap:12px;align-items:center}
.reply-btn{
    background:none;border:0;box-shadow:none;padding:0;
    color:var(--navy);font-size:.85rem;font-weight:600;cursor:pointer;
}
.reply-btn:hover{background:none;transform:none;box-shadow:none;text-decoration:underline}
.comment-reply{
    margin-top:12px;margin-left:24px;padding-left:16px;border-left:2px solid var(--band);
}
/* .pending-badge la NHAN nho; .pending la class TRANG THAI dat tren ca
   khoi .comment-item. Gop chung se bop ca khoi thanh hinh vien thuoc. */
.pending-badge{
    display:inline-block;background:#fff6e0;color:#8a6512;border:1px solid #f0dba6;
    font-size:.72rem;font-weight:700;padding:3px 10px;border-radius:99px;
    letter-spacing:.04em;text-transform:uppercase;margin-top:8px;
}

/* --- Khoi blog trang chu ----------------------------------------------- */
.blog-section{max-width:var(--wrap);margin:0 auto;padding:38px 20px}
.list-blog{
    display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:20px;
}

/* --- Dong ho bai test --------------------------------------------------- */
#timer{
    display:inline-flex;align-items:center;gap:8px;
    background:var(--surface);border:1px solid var(--rule);border-radius:11px;
    padding:10px 18px;margin:0 auto 18px;
    font-weight:700;font-variant-numeric:tabular-nums;color:var(--ink);
}
#timer::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--signal)}

/* --- O tim kiem --------------------------------------------------------- */
#search-input{
    width:100%;max-width:520px;padding:13px 16px;font-family:var(--sans);font-size:1rem;
    border:1.5px solid var(--rule);border-radius:11px;background:#fff;color:var(--ink);
}
#search-input:focus{outline:none;border-color:var(--navy)}

/* --- Form binh luan ----------------------------------------------------- */
#main-comment-form{
    background:var(--surface);border:1px solid var(--rule);border-radius:var(--r);
    padding:22px;margin-top:22px;
}

/* --- Thong bao ---------------------------------------------------------- */
.alert{
    border-radius:11px;padding:14px 18px;margin-bottom:18px;
    font-size:.94rem;border:1px solid var(--rule);background:var(--surface);
}
.alert-success{background:#eaf6ec;border-color:#bcdfc4;color:#1e5c2c}

/* --- Nut phu (kid_iq) --------------------------------------------------- */
.disc2{
    background:transparent;color:var(--navy);border:1.5px solid var(--rule);
    box-shadow:none;font-weight:600;
}
.disc2:hover{background:#fff;border-color:var(--navy);box-shadow:none;transform:none}

/* ===========================================================================
   FORM BINH LUAN
   Cac the input/textarea/button trong #main-comment-form va .reply-form
   KHONG co class nao, nen phai nham theo the truc tiep.
   =========================================================================== */
/* #main-comment-form dung luoi duoc.
   .reply-form thi KHONG: JS bat/tat no bang style="display:block" inline,
   ma inline style thang moi quy tac CSS -> display:grid khong bao gio
   co hieu luc. Nen bo cuc theo khoi va gian cach bang margin. */
#main-comment-form{
    display:grid;
    gap:12px;
    margin-top:16px;
}
.reply-form{margin-top:14px}
.reply-form>input,
.reply-form>textarea{margin-bottom:10px}
#main-comment-form input[type="text"],
#main-comment-form textarea,
.reply-form input[type="text"],
.reply-form textarea{
    width:100%;
    padding:13px 15px;
    font-family:var(--sans);
    font-size:1rem;
    line-height:1.5;
    color:var(--ink);
    background:#fbfcfe;
    border:1.5px solid var(--rule);
    border-radius:10px;
    transition:border-color .15s,background .15s;
}
#main-comment-form input[type="text"]:focus,
#main-comment-form textarea:focus,
.reply-form input[type="text"]:focus,
.reply-form textarea:focus{
    outline:none;border-color:var(--navy);background:#fff;
}
#main-comment-form input::placeholder,
#main-comment-form textarea::placeholder,
.reply-form input::placeholder,
.reply-form textarea::placeholder{color:#8b96b5}

#main-comment-form textarea,
.reply-form textarea{min-height:120px;resize:vertical}
.reply-form textarea{min-height:88px}

#main-comment-form button,
.reply-form button{justify-self:start;padding:13px 26px}
.reply-form button{padding:11px 20px;font-size:.94rem}

/* o nhap ten chi can nua hang tren man hinh rong */
@media(min-width:640px){
    #main-comment-form{grid-template-columns:1fr 1fr}
    #main-comment-form input[type="text"]{grid-column:1 / 2}
    #main-comment-form textarea,
    #main-comment-form button{grid-column:1 / -1}
    .reply-form>input[type="text"]{max-width:22rem}
}

/* --- Anh dai dien la <div> chua chu cai, khong phai <img> ------------- */
.comment-left .avatar{
    width:42px;height:42px;border-radius:50%;
    background:var(--navy);color:#fff;
    display:flex;align-items:center;justify-content:center;
    font-weight:700;font-size:1.02rem;line-height:1;flex-shrink:0;
}
.comment-left{flex-shrink:0;margin-right:0}
.comment-reply .comment-left .avatar{width:34px;height:34px;font-size:.9rem}

.comment-item.pending{background:#fffdf6;border-color:#f0dba6}
.comment-actions{margin-top:8px}

/* Thong bao ket qua ngay trong form, thay cho alert() */
.form-note{
    margin:4px 0 0;font-size:.9rem;font-weight:600;line-height:1.45;
    padding:10px 13px;border-radius:9px;border:1px solid transparent;
}
#main-comment-form .form-note{grid-column:1 / -1}
.form-note.is-ok{background:#eaf6ec;border-color:#bcdfc4;color:#1e5c2c}
.form-note.is-error{background:#fdeceb;border-color:#f3c4c0;color:#8f2c22}