/* === RESET & BASE === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;font-size:16px;line-height:1.6;color:#333;background:#fff}
img{max-width:100%;height:auto;display:block}
iframe,video,embed,object{max-width:100%}
a{color:#1a73e8;text-decoration:none;transition:color .2s}
a:hover{color:#1557b0}
ul,ol{list-style:none}
h1,h2,h3,h4{line-height:1.3;color:#1a1a1a}
button{cursor:pointer;border:none;background:none;font:inherit}

/* === LAYOUT === */
.container{max-width:1200px;margin:0 auto;padding:0 16px}
.content-layout{display:grid;grid-template-columns:1fr 280px;gap:32px;margin-top:16px}
.content-main{min-width:0}
.content-sidebar{min-width:0}
@media(max-width:768px){
    .content-layout{grid-template-columns:1fr;gap:24px}
    .hide-mobile{display:none!important}
}

/* === HEADER === */
.site-header{position:sticky;top:0;z-index:100;background:#fff;box-shadow:0 1px 4px rgba(0,0,0,.08);transition:box-shadow .3s}
.header-inner{display:flex;align-items:center;height:64px;gap:16px}
.site-logo img{height:44px;width:auto}
.main-nav{flex:1;display:flex;justify-content:center}
.nav-menu{display:flex;gap:4px}
.nav-menu li{position:relative}
.nav-menu>li>a{display:block;padding:8px 14px;font-size:14px;font-weight:500;color:#333;border-radius:6px;transition:background .2s,color .2s;white-space:nowrap}
.nav-menu>li>a:hover,.nav-menu>li.current-menu-item>a{color:#1a73e8;background:#e8f0fe}
.nav-menu .sub-menu{position:absolute;top:100%;left:0;min-width:220px;background:#fff;box-shadow:0 8px 24px rgba(0,0,0,.12);border-radius:8px;padding:8px 0;opacity:0;visibility:hidden;transform:translateY(8px);transition:all .2s}
.nav-menu li:hover>.sub-menu{opacity:1;visibility:visible;transform:translateY(0)}
.nav-menu .sub-menu a{display:block;padding:8px 16px;font-size:14px;color:#555}
.nav-menu .sub-menu a:hover{color:#1a73e8;background:#f5f7fa}
.header-phone{display:flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:#1a73e8;white-space:nowrap}
@media(max-width:900px){.main-nav,.header-phone{display:none}}

/* === MOBILE MENU === */
.mobile-menu-toggle{display:none;width:32px;height:24px;flex-direction:column;justify-content:space-between;padding:0;margin-left:auto}
.mobile-menu-toggle span{display:block;width:100%;height:3px;background:#333;border-radius:2px;transition:transform .3s}
@media(max-width:900px){.mobile-menu-toggle{display:flex}}
.mobile-menu-overlay{position:fixed;inset:0;z-index:200;background:rgba(0,0,0,.5);opacity:0;visibility:hidden;transition:opacity .3s}
.mobile-menu-overlay.open{opacity:1;visibility:visible}
.mobile-menu-panel{position:fixed;top:0;left:0;bottom:0;width:min(300px,80vw);background:#fff;padding:20px;overflow-y:auto;transform:translateX(-100%);transition:transform .3s}
.mobile-menu-overlay.open .mobile-menu-panel{transform:translateX(0)}
.mobile-menu-close{position:absolute;top:12px;right:12px;font-size:28px;color:#666;line-height:1}
.mobile-nav-menu{margin-top:40px}
.mobile-nav-menu li{border-bottom:1px solid #eee}
.mobile-nav-menu a{display:block;padding:12px 0;font-size:15px;color:#333}
.mobile-nav-menu .sub-menu{padding-left:16px}
.mobile-nav-menu .sub-menu a{font-size:14px;color:#666}

/* === HERO SLIDER === */
.hero-slider{position:relative;overflow:hidden;background:#f0f4f8}
.slider-track{position:relative}
.slide{display:none;position:relative}
.slide.active{display:block}
.slide img{width:100%;height:auto;object-fit:cover;max-height:500px}
.slide-content{position:absolute;inset:0;display:flex;align-items:center}
.slide-text{max-width:500px;color:#fff;text-shadow:0 2px 8px rgba(0,0,0,.4)}
.slide-text h2,.slide-text h3,.slide-text p{color:#fff}
.slider-prev,.slider-next{position:absolute;top:50%;transform:translateY(-50%);width:44px;height:44px;background:rgba(255,255,255,.85);color:#333;font-size:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 8px rgba(0,0,0,.15);transition:background .2s;z-index:5}
.slider-prev:hover,.slider-next:hover{background:#fff}
.slider-prev{left:12px}
.slider-next{right:12px}
.slider-hotline{position:absolute;bottom:16px;left:0;right:0;display:flex;gap:12px;z-index:5}
.hotline-badge{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:24px;font-size:14px;font-weight:600;color:#fff;background:rgba(0,0,0,.6);backdrop-filter:blur(4px)}
.hotline-badge--cta{background:#1a73e8}
.hotline-badge--cta:hover{background:#1557b0;color:#fff}
@media(max-width:768px){
    .hero-slider{position:relative}
    .slide img{max-height:220px;min-height:180px;object-fit:cover}
    .slide-content{position:absolute;inset:0;display:flex;align-items:flex-start;padding:12px 40px 12px 12px}
    .slide-text{font-size:12px;max-width:60%;background:rgba(0,0,0,.35);padding:10px 12px;border-radius:8px}
    .slide-text h2,.slide-text h3{font-size:14px;margin-bottom:4px}
    .slide-text p{font-size:12px;margin-bottom:6px;line-height:1.4}
    .slide-text .btn{font-size:12px;padding:6px 14px;display:inline-block;margin-top:4px}
    .slider-prev,.slider-next{width:28px;height:28px;font-size:14px;top:40%;opacity:.7}
    .slider-prev{left:4px}
    .slider-next{right:4px}
    .slider-hotline{position:relative;bottom:auto;background:#f0f4f8;padding:8px 12px;gap:6px;flex-wrap:wrap;justify-content:center}
    .hotline-badge{font-size:12px;padding:7px 14px;background:#1a73e8;border-radius:20px}
    .hotline-badge:first-child{background:#e53935}
    .hotline-badge--cta{background:#1a73e8}
}

/* === QUICK LINKS === */
.quick-links{background:#1a73e8;padding:0}
.quick-links-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.quick-link-item{display:flex;align-items:center;justify-content:center;padding:14px 8px;color:#fff;font-size:14px;font-weight:500;text-align:center;transition:background .2s;border-right:1px solid rgba(255,255,255,.15)}
.quick-link-item:last-child{border-right:none}
.quick-link-item:hover{background:rgba(255,255,255,.1);color:#fff}
@media(max-width:600px){
    .quick-links-grid{grid-template-columns:1fr 1fr}
    .quick-link-item{border-bottom:1px solid rgba(255,255,255,.15)}
    .quick-link-item:nth-child(odd){border-right:1px solid rgba(255,255,255,.15)}
}

/* === SECTIONS === */
.section-courses,.section-students,.section-videos,.section-interest,.section-testimonial{padding:40px 0}
.section-courses--compact{padding:24px 0}
.section-title{text-align:center;font-size:28px;font-weight:700;color:#1a1a1a;margin-bottom:24px}
.section-header{text-align:center;margin-bottom:24px}
.section-header .btn{margin-bottom:16px}
@media(max-width:768px){.section-title{font-size:22px}}

/* === CARDS === */
.course-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
@media(max-width:900px){.course-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){
    .course-grid{grid-template-columns:1fr}
    .news-grid{grid-template-columns:1fr}
}

.course-card,.news-card,.video-card,.student-card{background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,.06);transition:transform .2s,box-shadow .2s}
.course-card:hover,.news-card:hover,.video-card:hover,.student-card:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.1)}
.course-card__img img,.news-card__img img,.video-card__img img,.student-card__img img{width:100%;aspect-ratio:3/2;object-fit:cover;transition:transform .3s}
.course-card:hover img,.news-card:hover img,.video-card:hover img,.student-card:hover img{transform:scale(1.05)}
.course-card__title,.video-card__title,.student-card__title{padding:12px 14px;font-size:15px;font-weight:600}
.course-card__title a,.video-card__title a,.student-card__title a{color:#333}
.course-card__title a:hover,.video-card__title a:hover,.student-card__title a:hover{color:#1a73e8}
.news-card__title{padding:12px 16px 4px;font-size:16px;font-weight:600}
.news-card__title a{color:#333}
.news-card__title a:hover{color:#1a73e8}
.news-card__excerpt{padding:0 16px 16px;font-size:14px;color:#666;line-height:1.5}

/* === SCROLL SLIDER (horizontal) === */
.course-scroll,.student-scroll,.video-scroll,.testimonial-scroll{display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;scrollbar-width:none;padding-bottom:8px}
.course-scroll::-webkit-scrollbar,.student-scroll::-webkit-scrollbar,.video-scroll::-webkit-scrollbar,.testimonial-scroll::-webkit-scrollbar{display:none}
.course-scroll>*,.student-scroll>*,.video-scroll>*{flex:0 0 260px;scroll-snap-align:start}
.testimonial-scroll>*{flex:0 0 min(500px,85vw);scroll-snap-align:start}

/* === SIDEBAR === */
.sidebar-title{font-size:16px;font-weight:700;color:#1a1a1a;padding-bottom:12px;border-bottom:2px solid #1a73e8;margin-bottom:16px}
.sidebar-post{margin-bottom:20px}
.sidebar-post__img img{width:100%;border-radius:6px;aspect-ratio:3/2;object-fit:cover}
.sidebar-post__title{font-size:14px;font-weight:600;margin-top:8px;line-height:1.4}
.sidebar-post__title a{color:#333}
.sidebar-post__title a:hover{color:#1a73e8}
.sidebar-post__excerpt{font-size:13px;color:#888;margin-top:4px}

/* === TESTIMONIAL === */
.section-testimonial{background:#f7f9fc;padding:48px 0}
.testimonial-card{display:flex;gap:20px;background:#fff;border-radius:12px;padding:20px;box-shadow:0 2px 8px rgba(0,0,0,.06)}
.testimonial-card__img{flex:0 0 120px}
.testimonial-card__img img{width:120px;height:160px;object-fit:cover;border-radius:8px}
.testimonial-card__body{position:relative;flex:1}
.testimonial-quote{position:absolute;top:-4px;left:-4px}
.testimonial-card__text{font-size:14px;color:#555;line-height:1.7;margin-top:24px;font-style:italic;border:none;padding:0}
.testimonial-card__footer{margin-top:12px}
.testimonial-card__footer strong{display:block;color:#1a1a1a;font-size:15px}
.testimonial-card__footer span{font-size:13px;color:#888}
@media(max-width:600px){
    .testimonial-card{flex-direction:column;align-items:center;text-align:center}
    .testimonial-card__img{flex:none}
}

/* === BREADCRUMB === */
.breadcrumb-wrap{padding:12px 0;font-size:13px;color:#888;border-bottom:1px solid #eee;margin-bottom:16px}
.breadcrumb-wrap a{color:#1a73e8}
.breadcrumb-wrap span[typeof="ListItem"]+span::before{content:" › ";color:#ccc}

/* === PAGE CONTENT === */
.page-title{font-size:26px;font-weight:700;color:#1a1a1a;margin-bottom:16px;line-height:1.3}
.article-content{font-size:16px;line-height:1.8;color:#444}
.article-content h2{font-size:22px;margin:24px 0 12px;color:#1a1a1a}
.article-content h3{font-size:18px;margin:20px 0 10px;color:#333}
.article-content p{margin-bottom:16px}
.article-content img{border-radius:8px;margin:16px 0;max-width:100%;height:auto;width:auto}
.article-content table{width:100%!important;height:auto!important;border-collapse:collapse;font-size:14px;display:table;overflow-x:auto}
.article-content table td,.article-content table th{padding:8px 10px;border:1px solid #e5e7eb;vertical-align:top}
.article-content table th{background:#f5f7fa;font-weight:600}
@media(max-width:768px){
    .article-content table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}
    .article-content table tbody,.article-content table tr{display:table;width:100%}
}
.article-content figure{margin:16px 0;max-width:100%}
.article-content .wp-block-image,.article-content .wp-block-embed{max-width:100%;overflow:hidden}
.article-content ul,.article-content ol{margin:12px 0 12px 24px}
.article-content ul{list-style:disc}
.article-content ol{list-style:decimal}
.article-content li{margin-bottom:6px}
.responsive-video{position:relative;padding-bottom:56.25%;height:0;overflow:hidden;border-radius:8px;margin:16px 0}
.responsive-video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.adv-course-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin-bottom:20px}
.adv-course-grid a,.adv-course-grid>img{display:block;overflow:hidden;border-radius:8px}
.adv-course-grid img{width:100%;height:auto;object-fit:cover;border-radius:8px}
@media(max-width:480px){.adv-course-grid{grid-template-columns:1fr}}

/* === SHARE === */
.share-post{display:flex;align-items:center;gap:12px;padding:20px 0;margin-top:24px;border-top:1px solid #eee}
.share-label{font-size:14px;font-weight:600;color:#666}
.share-post a,.share-post button{color:#888;transition:color .2s}
.share-post a:hover,.share-post button:hover{color:#1a73e8}

/* === ACCORDION (FAQ) === */
.accordion{margin-top:20px}
.accordion-item{border:1px solid #e5e7eb;border-radius:8px;margin-bottom:8px;overflow:hidden}
.accordion-header{display:flex;align-items:center;justify-content:space-between;width:100%;padding:14px 16px;font-size:15px;font-weight:600;color:#333;background:#fafbfc;text-align:left;transition:background .2s}
.accordion-header:hover{background:#f0f4f8}
.accordion-icon{width:20px;height:20px;position:relative;flex-shrink:0}
.accordion-icon::before,.accordion-icon::after{content:"";position:absolute;background:#666;border-radius:1px}
.accordion-icon::before{top:50%;left:2px;right:2px;height:2px;transform:translateY(-50%)}
.accordion-icon::after{left:50%;top:2px;bottom:2px;width:2px;transform:translateX(-50%);transition:transform .3s}
.accordion-item.active .accordion-icon::after{transform:translateX(-50%) scaleY(0)}
.accordion-body{padding:0 16px 16px;font-size:15px;line-height:1.7;color:#555}

/* === SCHEDULE TABLE === */
.schedule-block{margin-bottom:32px}
.schedule-month{font-size:20px;font-weight:700;color:#1a73e8;margin-bottom:12px;padding:10px 16px;background:#e8f0fe;border-radius:8px}
.schedule-table-wrap{overflow-x:auto}
.schedule-table{width:100%;border-collapse:collapse;font-size:14px}
.schedule-table th{background:#1a73e8;color:#fff;font-weight:600;padding:12px 16px;text-align:left;white-space:nowrap}
.schedule-table td{padding:12px 16px;border-bottom:1px solid #eee}
.schedule-table tr:hover td{background:#f7f9fc}

/* === PAGINATION === */
.pagination{display:flex;justify-content:center;gap:4px;margin:32px 0;flex-wrap:wrap}
.pagination a,.pagination span{display:flex;align-items:center;justify-content:center;min-width:36px;height:36px;padding:0 10px;border-radius:6px;font-size:14px;color:#555;background:#f5f7fa;transition:all .2s}
.pagination a:hover{background:#1a73e8;color:#fff}
.pagination .current{background:#1a73e8;color:#fff;font-weight:600}

/* === BUTTONS === */
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 24px;border-radius:8px;font-size:15px;font-weight:600;transition:all .2s;cursor:pointer}
.btn-primary{background:#1a73e8;color:#fff}
.btn-primary:hover{background:#1557b0;color:#fff}

/* === FOOTER === */
.site-footer{background:#1a1a2e;color:#ccc;padding:48px 0 0}
.footer-grid{display:grid;grid-template-columns:1fr 2fr;gap:40px}
.footer-heading{font-size:18px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-address{font-size:14px;line-height:1.7;color:#aaa}
.footer-address a{color:#5fa8ff}
.footer-social{display:flex;gap:12px;margin-top:16px}
.footer-social a{color:#aaa;transition:color .2s}
.footer-social a:hover{color:#fff}
.footer-menu,.footer-menu-2{display:flex;flex-wrap:wrap;gap:8px 24px}
.footer-menu a,.footer-menu-2 a{font-size:14px;color:#ccc;transition:color .2s}
.footer-menu a:hover,.footer-menu-2 a:hover{color:#fff}
.footer-hotline{margin-top:12px}
.footer-hotline a{display:inline-flex;align-items:center;gap:6px;color:#5fa8ff;font-weight:600;font-size:15px}
.footer-form{margin-top:16px}
.footer-menu-row{margin-bottom:20px}
.footer-copyright{margin-top:32px;padding:16px 0;border-top:1px solid rgba(255,255,255,.1);text-align:center;font-size:13px;color:#888}
@media(max-width:768px){
    .footer-grid{grid-template-columns:1fr;gap:24px}
}

/* === FLOATING SUPPORT === */
.float-support{position:fixed;bottom:20px;right:20px;display:flex;flex-direction:column;gap:10px;z-index:150}
.float-btn{display:flex;align-items:center;gap:8px;padding:10px 16px;border-radius:24px;font-size:13px;font-weight:600;color:#fff;box-shadow:0 4px 16px rgba(0,0,0,.2);transition:transform .2s}
.float-btn:hover{transform:scale(1.05);color:#fff}
.float-btn--phone{background:#e53935}
.float-btn--zalo{background:#0068ff}
.zalo-icon{font-weight:800;font-size:14px}
@media(max-width:600px){
    .float-btn span:not(.zalo-icon){display:none}
    .float-btn{padding:12px}
    .float-support{bottom:12px;right:12px;gap:8px}
}

/* === 404 === */
.error-404{text-align:center;padding:60px 0}
.error-404 .page-title{font-size:32px}
.error-404 p{font-size:16px;color:#666;margin-bottom:20px}

/* === CONTACT === */
.contact-schedule{margin:20px 0;padding:16px;background:#f7f9fc;border-radius:8px}
.contact-schedule h3{font-size:16px;margin-bottom:8px}
.contact-schedule p{margin-bottom:4px;font-size:14px}
.contact-hotline{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin:16px 0}
.hotline-link{display:inline-flex;align-items:center;gap:6px;font-size:18px;font-weight:700;color:#1a73e8}
.contact-form{margin-top:16px}
.text-small{font-size:13px;color:#888}
.text-muted{color:#999}

/* === CF7 FORM STYLING === */
.wpcf7 input[type="text"],.wpcf7 input[type="email"],.wpcf7 input[type="tel"],.wpcf7 textarea,.wpcf7 select{width:100%;padding:10px 14px;border:1px solid #ddd;border-radius:6px;font-size:14px;transition:border-color .2s;background:#fff}
.wpcf7 input:focus,.wpcf7 textarea:focus,.wpcf7 select:focus{outline:none;border-color:#1a73e8;box-shadow:0 0 0 3px rgba(26,115,232,.1)}
.wpcf7 input[type="submit"]{padding:10px 28px;background:#1a73e8;color:#fff;border:none;border-radius:6px;font-size:15px;font-weight:600;cursor:pointer;transition:background .2s}
.wpcf7 input[type="submit"]:hover{background:#1557b0}
.wpcf7-response-output{border-radius:6px!important;font-size:14px}

/* === SEARCH FORM === */
.search-form{display:flex;max-width:400px;margin:0 auto}
.search-form .search-field{flex:1;padding:10px 14px;border:1px solid #ddd;border-radius:6px 0 0 6px;font-size:14px}
.search-form .search-submit{padding:10px 20px;background:#1a73e8;color:#fff;border:none;border-radius:0 6px 6px 0;font-weight:600;cursor:pointer}

/* === DMCA === */
.dmca-badge{position:fixed;bottom:8px;left:8px;z-index:50;opacity:.7}
.dmca-badge img{height:20px;width:auto}

/* === CONTENT OVERFLOW FIX === */
.article-content,.content-main{overflow-wrap:break-word;word-wrap:break-word}
.article-content *{max-width:100%}
.article-content img[style]{max-width:100%!important;height:auto!important}
.article-content a>img{display:inline-block}
.article-content figure,.article-content .wp-caption{max-width:100%!important;width:auto!important;height:auto}
.article-content figure[style],.article-content .wp-caption[style]{max-width:100%!important;width:auto!important}
.article-content figure img,.article-content .wp-caption img{width:100%;height:auto}
.article-content .wp-caption-text{font-size:13px;color:#888;text-align:center;margin-top:6px}
@media(max-width:768px){
    .site-logo img{height:36px}
    .header-inner{height:56px}
    .page-title{font-size:20px}
    .section-content{padding:8px 0 24px}
    .sidebar-post__img img{aspect-ratio:3/2;object-fit:cover;width:100%}
    .article-content img{margin:10px 0}
    .content-sidebar{border-top:1px solid #eee;padding-top:20px}
}

/* === UTILITY === */
@media print{.site-header,.site-footer,.float-support,.dmca-badge,.slider-hotline{display:none}}