.btn{display:inline-block;padding:10px 20px;background-color:#06c;color:#fff;border:none;border-radius:4px;cursor:pointer;transition:background-color .3s ease}.btn:hover{background-color:#049;color:#fff}input[type=text],input[type=email],input[type=tel],textarea{width:100%;padding:10px;border:1px solid #ddd;border-radius:4px;margin-bottom:15px}.post{margin-bottom:40px}.post-thumbnail{margin-bottom:20px}.post-title{margin-bottom:10px}.post-meta{color:#777;font-size:14px;margin-bottom:15px}.widget{margin-bottom:30px}.widget ul{list-style:none}.widget li{margin-bottom:8px}.search-form{display:flex}.search-form input{flex:1;margin-right:10px}img{height:auto;max-width:100%}.screen-reader-text{border:0;clip:rect(1px,1px,1px,1px);clip-path:inset(50%);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px;word-wrap:normal !important}.screen-reader-text:focus{background-color:#f1f1f1;border-radius:3px;box-shadow:0 0 2px 2px rgba(0,0,0,.6);clip:auto !important;clip-path:none;color:#21759b;display:block;font-size:14px;font-size:.875rem;font-weight:700;height:auto;left:5px;line-height:normal;padding:15px 23px 14px;text-decoration:none;top:5px;width:auto;z-index:100000}.main-navigation{display:flex;align-items:center}.menu-toggle{display:none;background:0 0;border:none;cursor:pointer;padding:10px;margin-left:15px;flex-direction:column;justify-content:center}.hamburger-box{width:65px;height:24px;display:inline-block;position:relative;DOI VI TRI MENU}.hamburger-inner{display:block;top:50%;margin-top:-2px}.hamburger-inner,.hamburger-inner:before,.hamburger-inner:after{width:30px;height:3px;background-color:#333;border-radius:3px;position:absolute;transition:transform .3s ease}.hamburger-inner:before,.hamburger-inner:after{content:"";display:block}.hamburger-inner:before{top:-10px}.hamburger-inner:after{bottom:-10px}.menu-toggle-text{margin-left:8px;font-size:14px;font-weight:500}.primary-menu-container{display:flex}.menu{display:flex;list-style:none;margin:0;padding:0}.menu li{position:relative;margin:0 15px}.menu a{color:#333;font-weight:500;padding:10px 0;display:block;position:relative}.menu a:hover{color:#06c}.menu .sub-menu{position:absolute;top:100%;left:0;background-color:#fff;box-shadow:0 2px 10px rgba(0,0,0,.1);min-width:200px;z-index:999;opacity:0;visibility:hidden;transform:translateY(10px);transition:all .3s ease}.menu li:hover>.sub-menu{opacity:1;visibility:visible;transform:translateY(0)}.menu .sub-menu li{margin:0;width:100%}.menu .sub-menu a{padding:12px 15px;border-bottom:1px solid #f0f0f0}.menu .sub-menu a:hover{background-color:#f8f8f8}.entry-header{margin-bottom:30px;text-align:center}.entry-title{font-size:2.5rem;margin-bottom:15px;color:#333}.entry-meta{color:#666;font-size:.9rem;margin-bottom:20px}.posted-on,.byline{margin-right:15px}.entry-content{line-height:1.8;font-size:1.1rem}.entry-content p{margin-bottom:1.5rem}.entry-content h2{font-size:1.8rem;margin:2rem 0 1rem;color:#333}.entry-content h3{font-size:1.5rem;margin:1.5rem 0 .8rem;color:#444}.entry-content ul,.entry-content ol{margin-bottom:1.5rem;padding-left:2rem}.entry-content li{margin-bottom:.5rem}.entry-content blockquote{border-left:4px solid #06c;padding-left:1rem;margin:2rem 0;font-style:italic;color:#555}.entry-content img{max-width:100%;height:auto;margin:1.5rem 0}.post-thumbnail{margin-bottom:2rem}.featured-image{width:100%;height:auto;border-radius:8px}.entry-footer{margin-top:3rem;padding-top:1.5rem;border-top:1px solid red;color:#000dff;font-size:.9rem;DANG TRONG DUOC GAN #000dff CUNG MAU TIEU}.cat-links,.tags-links{display:block;margin-bottom:.5rem}.edit-link{display:block;margin-top:1rem}.post-navigation{margin:3rem 0;padding:1.5rem 0;border-top:1px solid #eee;border-bottom:1px solid #eee}.nav-links{display:flex;justify-content:space-between}.nav-previous,.nav-next{flex:1}.nav-next{text-align:right}.nav-subtitle{display:block;font-size:.8rem;color:#0018ff;margin-bottom:.5rem;SAU TRUOC}.nav-title{font-weight:500;color:#333;TIEU DE SAU TRUOC}.comments-area{margin-top:3rem;padding-top:1.5rem;border-top:1px solid #eee}.comment-list{list-style:none;padding:0}.comment{margin-bottom:2rem;padding:1.5rem;background:#f9f9f9;border-radius:8px}.comment-meta{margin-bottom:1rem}.comment-author{font-weight:700}.comment-metadata{font-size:.8rem;color:#666}.comment-content{line-height:1.6}@media (max-width:768px){.entry-title{font-size:2rem}.entry-content{font-size:1rem}.nav-links{flex-direction:column;gap:1rem}.nav-next{text-align:left}}