*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Arial,"Helvetica Neue",sans-serif;background:#f4f7fb;color:#17324d;line-height:1.6}a{text-decoration:none;color:inherit}img{max-width:100%;display:block}.container{width:min(1180px,92%);margin:auto}.topbar{background:#073a97;color:#fff;font-size:14px}.topbar .container{display:flex;justify-content:space-between;gap:18px;padding:8px 0}.site-header{background:linear-gradient(135deg,#fff,#eaf3ff)}.brand{display:flex;align-items:center;gap:20px;padding:18px 0}.brand img{width:112px;height:112px;object-fit:contain}.brand h1{margin:0;color:#073a97;font-size:clamp(24px,4vw,42px);line-height:1.2}.brand p{margin:6px 0 0;color:#df1f1f;font-weight:700;letter-spacing:1px}.nav{background:#0649b8;color:#fff;position:sticky;top:0;z-index:100;box-shadow:0 3px 14px #001b4d33}.nav .container{display:flex;align-items:center}.nav a{padding:14px 18px;font-weight:700}.nav a:hover{background:#ffd600;color:#073a97}.menu-toggle{display:none;margin-left:auto;padding:12px 16px;border:0;background:transparent;color:#fff;font-size:24px}.hero{position:relative;min-height:410px;background:linear-gradient(#003f9e55,#001c5666),url('../images/school-banner.svg') center/cover;display:flex;align-items:center;color:white}.hero-card{max-width:720px;background:#002d78cc;padding:28px;border-left:7px solid #ffd600;border-radius:8px}.hero-card h2{font-size:clamp(30px,5vw,55px);line-height:1.15;margin:0 0 12px}.hero-card p{font-size:18px;margin:0}.ticker{background:#ffd600;color:#083f91}.ticker .container{display:flex;gap:16px;padding:10px 0;overflow:hidden}.ticker strong{white-space:nowrap}.ticker span{white-space:nowrap;animation:move 20s linear infinite}@keyframes move{from{transform:translateX(20%)}to{transform:translateX(-110%)}}.section{padding:46px 0}.section-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px;border-bottom:3px solid #0b53bd}.section-title h2{margin:0;background:#0b53bd;color:#fff;padding:9px 18px;border-radius:6px 6px 0 0;font-size:23px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 8px 24px #16365918;transition:.25s}.card:hover{transform:translateY(-5px);box-shadow:0 15px 30px #16365928}.card img{width:100%;height:210px;object-fit:cover;background:#dfeafa}.card-body{padding:18px}.badge{display:inline-block;background:#e7f0ff;color:#0649b8;padding:4px 9px;border-radius:20px;font-size:12px;font-weight:700}.card h3{margin:10px 0 8px;line-height:1.4;font-size:20px}.meta{font-size:13px;color:#64758b}.btn{display:inline-block;background:#0649b8;color:white;padding:9px 15px;border-radius:6px;font-weight:700;border:0;cursor:pointer}.btn:hover{background:#ffd600;color:#073a97}.two-col{display:grid;grid-template-columns:2fr 1fr;gap:28px}.notice-list,.quick-links{background:white;padding:20px;border-radius:12px;box-shadow:0 8px 24px #16365918}.notice-item{display:block;padding:14px 0;border-bottom:1px solid #e5ebf3}.notice-item:last-child{border:0}.quick-links a{display:block;padding:12px 14px;margin:8px 0;border-radius:7px;background:#edf4ff;color:#0649b8;font-weight:700}.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.gallery img{height:180px;width:100%;object-fit:cover;border-radius:10px;box-shadow:0 6px 18px #17324d22}.footer{background:#062d72;color:white;padding:35px 0}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:30px}.article{background:white;border-radius:12px;padding:28px;box-shadow:0 8px 24px #16365918}.article h1{color:#073a97;line-height:1.3}.article .cover{width:100%;max-height:520px;object-fit:cover;border-radius:10px;margin:20px 0}.empty{padding:30px;background:#fff;border:1px dashed #aac0dc;border-radius:10px;text-align:center;color:#61748c}.admin-wrap{min-height:100vh;background:#edf3fb}.admin-top{background:#073a97;color:#fff;padding:14px 0}.admin-layout{display:grid;grid-template-columns:230px 1fr;min-height:calc(100vh - 52px)}.sidebar{background:#fff;padding:20px;border-right:1px solid #dbe5f0}.sidebar a{display:block;padding:11px 12px;border-radius:7px;margin-bottom:5px;font-weight:700;color:#17416e}.sidebar a:hover,.sidebar a.active{background:#0b53bd;color:#fff}.admin-main{padding:28px}.panel{background:#fff;border-radius:12px;padding:22px;box-shadow:0 8px 24px #16365918;margin-bottom:24px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.field{margin-bottom:15px}.field label{display:block;font-weight:700;margin-bottom:6px}.field input,.field select,.field textarea{width:100%;padding:11px 12px;border:1px solid #c8d5e5;border-radius:7px;font:inherit}.field textarea{min-height:180px}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:11px;border-bottom:1px solid #e3e9f0;text-align:left;vertical-align:top}.alert{padding:12px 15px;border-radius:7px;margin-bottom:16px}.alert-ok{background:#e6f8ed;color:#126435}.alert-error{background:#ffe8e8;color:#9c1c1c}.login-page{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#073a97,#0b6edb)}.login-box{width:min(420px,92%);background:white;padding:30px;border-radius:14px;box-shadow:0 20px 50px #001b4d55}.login-box img{width:100px;margin:0 auto 12px}.muted{color:#687b91;font-size:14px}@media(max-width:850px){.grid{grid-template-columns:1fr 1fr}.two-col{grid-template-columns:1fr}.gallery{grid-template-columns:1fr 1fr}.admin-layout{grid-template-columns:1fr}.sidebar{display:flex;overflow:auto;gap:8px;border:0}.sidebar a{white-space:nowrap}.form-grid{grid-template-columns:1fr}}@media(max-width:620px){.topbar .container{display:block}.brand{align-items:flex-start}.brand img{width:82px;height:82px}.nav .container{display:block}.menu-toggle{display:block}.nav-links{display:none}.nav-links.open{display:block}.nav a{display:block}.grid{grid-template-columns:1fr}.gallery{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr}.hero{min-height:350px}.hero-card{margin:22px 0}}/* V2.4: banner cơ quan chủ quản, quản lý tài khoản và ổn định bố cục */
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:8px 0}.topbar-contact{display:flex;align-items:center;gap:14px;flex-wrap:wrap}.topbar a:hover{text-decoration:underline}.brand-text{min-width:0}.agency-name{color:#073a97;font-size:clamp(15px,1.7vw,22px);font-weight:800;line-height:1.3;margin-bottom:4px}.brand h1{font-size:clamp(27px,4vw,48px);overflow-wrap:anywhere}.brand p{color:#344f6c;font-size:clamp(13px,1.5vw,17px);font-weight:600;letter-spacing:0;overflow-wrap:anywhere}.admin-top-inner{display:flex;justify-content:space-between;align-items:center;gap:18px}.permission-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.check-card{display:flex;align-items:center;gap:8px;padding:10px 12px;background:#f3f7fc;border:1px solid #d5e1ef;border-radius:8px;font-weight:600}.check-card input{width:auto}.check-inline{display:inline-flex;margin-bottom:15px}.inline-form{display:inline}.link-danger{border:0;background:none;color:#b00020;cursor:pointer;padding:0;font:inherit}.btn-secondary{background:#687b91}.status-on,.status-off{display:inline-block;padding:3px 8px;border-radius:15px;font-size:12px;font-weight:700}.status-on{background:#e6f8ed;color:#126435}.status-off{background:#ffe8e8;color:#9c1c1c}.table-wrap{overflow-x:auto}.profile-panel{max-width:650px}.profile-panel form{max-width:520px}
@media(max-width:850px){.permission-grid{grid-template-columns:1fr 1fr}.admin-top-inner{align-items:flex-start;flex-direction:column}.brand{padding:14px 0}}
@media(max-width:620px){.topbar-inner{display:block}.topbar-contact{display:grid;gap:3px}.brand{align-items:center}.brand-text{width:calc(100% - 98px)}.agency-name{font-size:13px}.brand h1{font-size:24px}.brand p{font-size:12px;line-height:1.35}.permission-grid{grid-template-columns:1fr}.admin-main{padding:14px}.panel{padding:16px}.table{min-width:680px}}

/* V2.5: slider ảnh thuần, bỏ chữ trên banner và bỏ thanh thông báo chạy */
.home-slider{position:relative;width:100%;background:#dbe8f8;overflow:hidden}.slider-track{position:relative;width:100%;aspect-ratio:16/6;min-height:300px;max-height:580px}.slider-slide{position:absolute;inset:0;opacity:0;visibility:hidden;transition:opacity .65s ease}.slider-slide.is-active{opacity:1;visibility:visible}.slider-slide img{width:100%;height:100%;object-fit:cover}.slider-btn{position:absolute;top:50%;transform:translateY(-50%);z-index:5;width:46px;height:46px;border:0;border-radius:50%;background:#052f70b8;color:#fff;font-size:35px;line-height:1;cursor:pointer}.slider-prev{left:22px}.slider-next{right:22px}.slider-dots{position:absolute;left:50%;bottom:16px;transform:translateX(-50%);display:flex;gap:9px;z-index:5}.slider-dot{width:11px;height:11px;padding:0;border:2px solid #fff;border-radius:50%;background:#ffffff66;cursor:pointer}.slider-dot.is-active{background:#ffd600}.slider-empty{padding:42px 0;text-align:center;color:#5b6f86}.slider-admin-list{display:grid;gap:18px}.slider-admin-item{display:grid;grid-template-columns:minmax(240px,430px) 1fr;gap:18px;align-items:center;padding:14px;border:1px solid #dce5ef;border-radius:10px}.slider-admin-item img{width:100%;aspect-ratio:16/7;object-fit:cover;border-radius:8px}.slider-admin-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.btn-danger{background:#b42318}.btn:disabled{opacity:.45;cursor:not-allowed}.ticker{display:none!important}.hero{display:none!important}
@media(max-width:850px){.slider-track{aspect-ratio:16/8;min-height:260px}.slider-admin-item{grid-template-columns:1fr}.slider-btn{width:40px;height:40px}.slider-prev{left:10px}.slider-next{right:10px}}
@media(max-width:620px){.slider-track{aspect-ratio:16/9;min-height:210px}.slider-btn{width:34px;height:34px;font-size:27px}.slider-dots{bottom:9px}}

/* V2.7: header gọn, chữ tên trường nổi và trình soạn thảo bài viết */
.topbar{display:none!important}
.site-header{background:linear-gradient(115deg,#ffffff 0%,#f4f8ff 55%,#e9f2ff 100%);border-bottom:1px solid #d8e4f2}
.brand{min-height:150px;padding:12px 0;gap:20px}
.brand img{width:118px;height:118px;filter:drop-shadow(0 7px 10px rgba(3,46,112,.18))}
.agency-name{font-size:clamp(15px,1.55vw,21px);font-weight:700;letter-spacing:.3px;color:#183653;margin-bottom:3px}
.brand h1{font-family:Arial,"Helvetica Neue",sans-serif;font-size:clamp(32px,4.15vw,55px);font-weight:900;letter-spacing:-1.2px;line-height:1.05;color:#0a43a0;text-transform:uppercase;text-shadow:0 2px 0 #fff,0 4px 8px rgba(3,54,132,.20);white-space:normal}
.brand p{margin:9px 0 0;color:#d82323;font-size:clamp(13px,1.4vw,17px);font-weight:800;letter-spacing:.25px}
.nav a{padding:10px 18px}
.home-slider{
    width:100%;
    max-width:1180px;
    margin:0 auto;
    background:#e7eef8;
}

.slider-track{
    width:100%;
    aspect-ratio:5/1;
}

.slider-slide img{
    width:100%;
    height:100%;
    object-fit:contain;
    object-position:center center;
}
.article-content{font-size:17px;line-height:1.8;color:#243a50;margin-top:22px;overflow-wrap:anywhere}
.article-content p{margin:0 0 1.05em}
.article-content h2,.article-content h3,.article-content h4{color:#073a97;line-height:1.35;margin:1.35em 0 .55em}
.article-content img{display:block;max-width:100%;height:auto;margin:20px auto;border-radius:8px;box-shadow:0 6px 20px rgba(16,50,88,.14)}
.article-content figure{margin:22px 0;text-align:center}.article-content figcaption{font-size:14px;color:#687b91;margin-top:7px}
.article-content blockquote{margin:18px 0;padding:12px 18px;border-left:4px solid #0b53bd;background:#eef5ff}
.article-content table{border-collapse:collapse;width:100%;display:block;overflow-x:auto}.article-content th,.article-content td{border:1px solid #cfdbe8;padding:8px 10px}
.social-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:30px 0 8px;padding:16px;border-top:1px solid #dfe8f2;border-bottom:1px solid #dfe8f2}
.facebook-share,.facebook-page{display:inline-flex;align-items:center;min-height:38px;padding:8px 14px;border-radius:6px;background:#1877f2;color:#fff;font-weight:800}.facebook-page{background:#0b53bd}.facebook-share:hover,.facebook-page:hover{filter:brightness(.92)}
.editor-toolbar{display:flex;gap:6px;flex-wrap:wrap;padding:9px;background:#eef4fb;border:1px solid #c8d5e5;border-bottom:0;border-radius:8px 8px 0 0}
.editor-toolbar button,.editor-image-button{border:1px solid #b9c9dc;background:#fff;color:#17324d;border-radius:5px;min-height:34px;padding:6px 10px;font:inherit;font-weight:700;cursor:pointer}.editor-toolbar button:hover,.editor-image-button:hover{background:#dfeaff;color:#0649b8}
.rich-editor{min-height:360px;padding:18px;border:1px solid #c8d5e5;border-radius:0 0 8px 8px;background:#fff;line-height:1.75;outline:none;overflow-wrap:anywhere}.rich-editor:focus{border-color:#0b53bd;box-shadow:0 0 0 3px rgba(11,83,189,.12)}
.rich-editor img{display:block;max-width:100%;height:auto;margin:16px auto;border-radius:7px}.rich-editor h2,.rich-editor h3{color:#073a97}.rich-editor.is-uploading{opacity:.65;pointer-events:none}.editor-upload-status{font-size:13px;color:#0b53bd;font-weight:700;margin-left:auto;align-self:center}
@media(max-width:850px){.brand{min-height:125px}.brand img{width:98px;height:98px}.slider-track{aspect-ratio:16/6;min-height:210px}.brand h1{letter-spacing:-.7px}}
@media(max-width:620px){.brand{min-height:105px;padding:9px 0;gap:12px;align-items:center}.brand img{width:76px;height:76px}.brand-text{width:calc(100% - 88px)}.agency-name{font-size:11px;line-height:1.25}.brand h1{font-size:21px;letter-spacing:-.3px;text-shadow:0 1px 0 #fff,0 3px 6px rgba(3,54,132,.17)}.brand p{font-size:10px;margin-top:5px}.slider-track{aspect-ratio:16/7;min-height:170px}.rich-editor{min-height:300px;padding:12px}.social-actions{align-items:flex-start;flex-direction:column}}


/* V2.8: tin nhỏ, card có thể click và album ảnh */
.news-card{cursor:pointer}.news-card:focus-visible{outline:3px solid #ffd600;outline-offset:3px}.card-image-link{display:block}.card h3 a:hover{color:#0b53bd}
.compact-news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:22px;padding-top:22px;border-top:1px solid #d7e2ef}
.compact-news-card{display:grid;grid-template-columns:120px minmax(0,1fr);gap:13px;align-items:center;background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 5px 18px #16365915;transition:.2s;padding:8px}.compact-news-card:hover{transform:translateY(-3px);box-shadow:0 10px 24px #16365925;color:#0649b8}.compact-news-card img{width:120px;height:82px;object-fit:cover;border-radius:7px}.compact-news-card strong{display:block;line-height:1.35}.compact-news-card small{display:block;color:#687b91;margin-top:6px}
.album-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}.album-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 8px 24px #16365918;transition:.25s}.album-card:hover{transform:translateY(-5px);box-shadow:0 15px 30px #16365928}.album-cover{position:relative;aspect-ratio:4/3;background:#e5edf7}.album-cover img{width:100%;height:100%;object-fit:cover}.album-cover span{position:absolute;right:10px;bottom:10px;background:#052f70dd;color:#fff;padding:4px 9px;border-radius:15px;font-size:12px;font-weight:700}.album-card h3,.album-card p{margin:12px 15px}.album-card p{color:#687b91;font-size:14px}.album-placeholder{height:100%;display:grid;place-items:center;font-size:50px;color:#71869e}.album-description{background:#fff;padding:14px 18px;border-radius:8px}.album-photo-grid a{display:block}.album-photo-grid img{transition:.2s}.album-photo-grid img:hover{transform:scale(1.02)}
.lightbox[hidden]{display:none}.lightbox{position:fixed;inset:0;z-index:1000;background:#001027eF;display:grid;place-items:center;padding:55px 80px}.lightbox img{max-width:95vw;max-height:82vh;object-fit:contain}.lightbox button{position:absolute;border:0;background:#ffffff22;color:#fff;cursor:pointer}.lightbox-close{right:20px;top:15px;width:45px;height:45px;border-radius:50%;font-size:34px}.lightbox-prev,.lightbox-next{top:50%;transform:translateY(-50%);width:50px;height:70px;font-size:42px}.lightbox-prev{left:15px}.lightbox-next{right:15px}.lightbox-caption{position:absolute;bottom:14px;color:#fff;background:#0008;padding:6px 12px;border-radius:5px}
.album-admin-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.album-admin-card{border:1px solid #dce5ef;border-radius:10px;padding:14px}.album-admin-card>img{width:100%;height:190px;object-fit:cover;border-radius:8px}.album-admin-photos{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:12px}.album-admin-photos img{width:100%;height:80px;object-fit:cover;border-radius:5px}.album-admin-photos form{text-align:center}
@media(max-width:950px){.compact-news-grid{grid-template-columns:repeat(2,1fr)}.album-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.compact-news-grid{grid-template-columns:1fr}.compact-news-card{grid-template-columns:100px 1fr}.compact-news-card img{width:100px;height:72px}.album-grid,.album-admin-grid{grid-template-columns:1fr}.lightbox{padding:50px 45px}.album-admin-photos{grid-template-columns:repeat(3,1fr)}}

/* V3.0: Video, thông báo ở cột bên và phân nhóm văn bản */
.nav-dropdown{position:relative;display:inline-block}.nav-dropdown>a{display:block}.nav-dropdown-menu{display:none;position:absolute;left:0;top:100%;min-width:225px;background:#fff;color:#17416e;box-shadow:0 10px 28px #001b4d33;z-index:200;border-radius:0 0 8px 8px;overflow:hidden}.nav-dropdown:hover .nav-dropdown-menu,.nav-dropdown:focus-within .nav-dropdown-menu{display:block}.nav-dropdown-menu a{display:block;padding:11px 15px;border-bottom:1px solid #e5ebf3}.nav-dropdown-menu a:hover{background:#edf4ff;color:#0649b8}
.video-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.video-grid-page{grid-template-columns:repeat(3,minmax(0,1fr))}.video-card{display:block;background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 8px 24px #16365918;padding-bottom:14px;transition:.25s}.video-card:hover{transform:translateY(-4px);box-shadow:0 14px 30px #16365928}.video-thumb{position:relative;aspect-ratio:16/9;background:#dfeafa}.video-thumb img{width:100%;height:100%;object-fit:cover}.video-thumb>span{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);display:grid;place-items:center;width:54px;height:54px;border-radius:50%;background:#e62117e6;color:#fff;font-size:25px;padding-left:4px}.video-placeholder{height:100%;display:grid;place-items:center;font-size:46px;color:#6f849c}.video-card h3,.video-card p,.video-card small{display:block;margin:11px 14px 0}.video-card h3{line-height:1.4}.video-card small{color:#687b91}
.document-group-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.document-group-card{background:#fff;padding:20px;border-radius:12px;box-shadow:0 8px 24px #16365918}.document-group-card h3{margin-top:0;color:#073a97;border-bottom:2px solid #0b53bd;padding-bottom:9px}.document-mini{display:block;padding:11px 0;border-bottom:1px solid #e5ebf3}.document-mini strong{display:block;line-height:1.4}.document-mini span{display:block;color:#687b91;font-size:13px;margin-top:3px}.document-more{display:inline-block;margin-top:14px;color:#0649b8;font-weight:700}.document-tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:20px}.document-tabs a{padding:9px 14px;border-radius:20px;background:#e7f0ff;color:#0649b8;font-weight:700}.document-tabs a.active,.document-tabs a:hover{background:#0649b8;color:#fff}.quick-links-horizontal{display:flex;gap:12px;flex-wrap:wrap}.quick-links-horizontal a{margin:0}.home-main-row{padding-top:20px}
@media(max-width:850px){.video-grid-page,.document-group-grid{grid-template-columns:repeat(2,1fr)}.nav-dropdown{display:block}.nav-dropdown-menu{position:static;box-shadow:none;border-radius:0;background:#073f9d;color:#fff}.nav-dropdown.open .nav-dropdown-menu{display:block}}
@media(max-width:620px){.video-grid,.video-grid-page,.document-group-grid{grid-template-columns:1fr}}

/* Giữ banner tỷ lệ 5:1 trên mọi kích thước màn hình */
.slider-track{aspect-ratio:5/1!important;min-height:0!important;max-height:none!important}
.slider-slide img{object-fit:contain!important}