/* ============================================
   KTA ENGINEERING — shared stylesheet
   ============================================ */

:root{
  --navy:#0B2545;
  --steel:#1B4B91;
  --steel-light:#2E63B3;
  --amber:#E8A33D;
  --amber-dark:#C9832A;
  --ink:#16202B;
  --paper:#F4F6F8;
  --line:#D8DEE4;
  --white:#FFFFFF;
  --maxw:1120px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:'IBM Plex Sans',Arial,sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.55;
}
h1,h2,h3,h4{
  font-family:'Archivo',Arial,sans-serif;
  color:var(--navy);
  line-height:1.15;
  margin:0 0 .5em;
}
p{margin:0 0 1em;}
a{color:var(--steel);text-decoration:none;}
a:hover{color:var(--amber-dark);}
img{max-width:100%;display:block;}
ul{padding-left:1.2em;}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}

/* ---------- header ---------- */
.site-header{
  background:var(--white);
  border-bottom:3px solid var(--navy);
  position:sticky;top:0;z-index:50;
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 24px;max-width:var(--maxw);margin:0 auto;
}
.logo{display:flex;align-items:center;gap:10px;}
.logo svg{flex-shrink:0;}
.logo-text{font-family:'Archivo',Arial,sans-serif;font-weight:800;font-size:22px;color:var(--navy);letter-spacing:.5px;}
.logo-text span{color:var(--amber-dark);}
.logo-sub{font-size:10px;letter-spacing:1px;color:#6B7A8C;font-family:'IBM Plex Sans',sans-serif;margin-top:-2px;}

nav.main-nav{display:flex;gap:2px;}
nav.main-nav a{
  display:block;padding:10px 16px;font-weight:600;font-size:14.5px;color:var(--navy);
  border-radius:4px;transition:background .15s ease,color .15s ease;
}
nav.main-nav a:hover,nav.main-nav a.active{background:var(--navy);color:var(--white);}

.menu-toggle{display:none;background:none;border:2px solid var(--navy);border-radius:4px;padding:8px 10px;cursor:pointer;}
.menu-toggle span{display:block;width:20px;height:2px;background:var(--navy);margin:4px 0;}

/* ---------- hero ---------- */
.hero{
  background:linear-gradient(135deg,var(--navy) 0%,var(--steel) 100%);
  color:var(--white);
  position:relative;overflow:hidden;
  padding:72px 0 84px;
}
.hero::after{
  content:'';position:absolute;right:-80px;top:-80px;width:420px;height:420px;
  border:2px solid rgba(255,255,255,.12);border-radius:50%;
}
.hero::before{
  content:'';position:absolute;right:40px;bottom:-120px;width:280px;height:280px;
  border:2px solid rgba(232,163,61,.25);border-radius:50%;
}
.hero-inner{position:relative;z-index:2;max-width:640px;}
.eyebrow{
  display:inline-block;color:var(--amber);font-weight:600;font-size:14px;
  border-left:3px solid var(--amber);padding-left:10px;margin-bottom:18px;
}
.hero h1{color:var(--white);font-size:clamp(30px,4.2vw,48px);margin-bottom:.4em;}
.hero p.lead{font-size:18px;color:#D8E2F0;max-width:560px;}
.hero-actions{margin-top:28px;display:flex;gap:14px;flex-wrap:wrap;}

.btn{
  display:inline-block;padding:13px 26px;border-radius:3px;font-weight:600;font-size:15px;
  transition:transform .15s ease,box-shadow .15s ease;
}
.btn-amber{background:var(--amber);color:var(--navy);}
.btn-amber:hover{background:var(--amber-dark);color:var(--navy);transform:translateY(-2px);}
.btn-outline{border:2px solid rgba(255,255,255,.5);color:var(--white);}
.btn-outline:hover{border-color:var(--white);color:var(--white);}

/* ---------- sections ---------- */
section{padding:64px 0;}
.section-head{max-width:640px;margin-bottom:40px;}
.section-head h2{font-size:clamp(24px,3vw,34px);}
.section-head .kicker{
  color:var(--steel);font-weight:700;font-size:13px;letter-spacing:.4px;
  display:flex;align-items:center;gap:8px;margin-bottom:10px;
}
.section-head .kicker::before{content:'';width:26px;height:2px;background:var(--amber);display:inline-block;}

.bg-navy{background:var(--navy);color:#D8E2F0;}
.bg-navy h2{color:var(--white);}
.bg-white{background:var(--white);}

/* card grid */
.grid{display:grid;gap:24px;}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-2{grid-template-columns:repeat(2,1fr);}

.card{
  background:var(--white);border:1px solid var(--line);border-radius:4px;
  padding:26px 24px;border-top:3px solid var(--steel);
}
.card h3{font-size:18px;margin-bottom:8px;}
.card p{font-size:14.5px;color:#4A5A6B;margin-bottom:0;}
.card .icon{margin-bottom:14px;color:var(--steel);}

.bg-navy .card{background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.12);border-top-color:var(--amber);}
.bg-navy .card h3{color:var(--white);}
.bg-navy .card p{color:#B9C8DC;}

/* list-style link rows (product categories) */
.link-rows{display:flex;flex-direction:column;border-top:1px solid var(--line);}
.link-row{
  display:flex;justify-content:space-between;align-items:center;
  padding:18px 4px;border-bottom:1px solid var(--line);
}
.link-row .name{font-weight:600;color:var(--navy);font-size:16px;}
.link-row .desc{color:#5A6A7B;font-size:14px;margin-top:2px;}
.link-row .arrow{color:var(--amber-dark);font-size:20px;flex-shrink:0;margin-left:16px;}

/* stats strip */
.stats{display:flex;gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.stat{flex:1;text-align:center;padding:28px 12px;border-left:1px solid var(--line);}
.stat:first-child{border-left:none;}
.stat .num{font-family:'Archivo',Arial,sans-serif;font-weight:800;font-size:30px;color:var(--navy);}
.stat .label{font-size:13px;color:#5A6A7B;margin-top:4px;}

/* contact block */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:start;}
.contact-info .row{display:flex;gap:14px;margin-bottom:20px;align-items:flex-start;}
.contact-info .row .ico{color:var(--amber-dark);flex-shrink:0;margin-top:2px;}
.contact-info .row .label{font-size:13px;color:#5A6A7B;margin-bottom:2px;}
.contact-info .row .value{font-weight:600;color:var(--navy);}

.form-box{background:var(--white);border:1px solid var(--line);border-radius:4px;padding:28px;}
.form-box label{display:block;font-size:13px;font-weight:600;color:var(--navy);margin:14px 0 6px;}
.form-box label:first-child{margin-top:0;}
.form-box input,.form-box textarea{
  width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:3px;
  font-family:inherit;font-size:14.5px;background:var(--paper);
}
.form-box textarea{min-height:110px;resize:vertical;}
.form-box .btn{margin-top:18px;border:none;cursor:pointer;font-family:inherit;}

/* breadcrumb / page header for inner pages */
.page-head{
  background:var(--navy);color:var(--white);padding:44px 0;
}
.page-head .crumb{font-size:13px;color:#9FB3CC;margin-bottom:10px;}
.page-head .crumb a{color:#9FB3CC;}
.page-head h1{color:var(--white);font-size:clamp(26px,3.6vw,38px);margin:0;}

/* team */
.team-card{text-align:center;}
.avatar{
  width:96px;height:96px;border-radius:50%;background:var(--paper);border:2px solid var(--line);
  margin:0 auto 14px;display:flex;align-items:center;justify-content:center;color:var(--steel);
}

/* footer */
footer{background:var(--navy);color:#B9C8DC;padding:48px 0 24px;}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:32px;margin-bottom:36px;}
.footer-col h4{color:var(--white);font-size:15px;margin-bottom:14px;}
.footer-col p,.footer-col a{color:#9FB3CC;font-size:14px;display:block;}
.footer-col ul{list-style:none;padding:0;margin:0;}
.footer-col li{margin-bottom:9px;}
.footer-col a:hover{color:var(--amber);}
.footer-logo{font-family:'Archivo',sans-serif;font-weight:800;color:var(--white);font-size:20px;margin-bottom:10px;}
.footer-logo span{color:var(--amber);}
.social-row{display:flex;gap:10px;margin-top:16px;}
.social-row a{
  width:34px;height:34px;border:1px solid rgba(255,255,255,.25);border-radius:50%;
  display:flex;align-items:center;justify-content:center;color:var(--white);
}
.social-row a:hover{background:var(--amber);border-color:var(--amber);color:var(--navy);}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;font-size:13px;color:#7E93AC;text-align:center;}

/* ---------- news / posts ---------- */
.tag-filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:32px;}
.tag-filters button{
  background:var(--white);border:1px solid var(--line);color:var(--navy);
  padding:8px 16px;border-radius:20px;font-weight:600;font-size:13.5px;cursor:pointer;font-family:inherit;
}
.tag-filters button.active,.tag-filters button:hover{background:var(--navy);color:var(--white);border-color:var(--navy);}

.post-card{
  background:var(--white);border:1px solid var(--line);border-radius:4px;overflow:hidden;
  display:flex;flex-direction:column;
}
.post-card .thumb{
  height:150px;background:linear-gradient(135deg,var(--navy),var(--steel));
  display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.5);
}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;}
.post-card .body{padding:20px;flex:1;display:flex;flex-direction:column;}
.post-card .cat{color:var(--amber-dark);font-size:12px;font-weight:700;letter-spacing:.3px;margin-bottom:8px;text-transform:uppercase;}
.post-card h3{font-size:17px;margin-bottom:8px;}
.post-card .excerpt{font-size:14px;color:#5A6A7B;flex:1;}
.post-card .date{font-size:12.5px;color:#8C9AAB;margin-top:14px;}

.post-detail .meta{color:#5A6A7B;font-size:14px;margin-bottom:24px;}
.post-detail .meta .cat{color:var(--amber-dark);font-weight:700;}
.post-detail .body p{color:#334454;font-size:16px;line-height:1.75;}
.empty-msg{color:#8C9AAB;padding:40px 0;text-align:center;}

/* ---------- admin dashboard ---------- */
.admin-body{background:var(--paper);}
.admin-shell{max-width:960px;margin:0 auto;padding:32px 24px 80px;}
.admin-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;flex-wrap:wrap;gap:12px;}
.admin-panel{background:var(--white);border:1px solid var(--line);border-radius:4px;padding:24px;margin-bottom:24px;}
.admin-panel h2{font-size:19px;margin-bottom:4px;}
.admin-note{background:#FFF6E8;border:1px solid #F0DAA8;color:#6B4E14;padding:14px 16px;border-radius:4px;font-size:14px;margin-bottom:24px;}
.admin-note strong{color:#4A3300;}
.post-row{
  display:flex;justify-content:space-between;align-items:center;gap:14px;
  padding:14px 0;border-bottom:1px solid var(--line);
}
.post-row:last-child{border-bottom:none;}
.post-row .info .t{font-weight:600;color:var(--navy);}
.post-row .info .m{font-size:12.5px;color:#8C9AAB;margin-top:2px;}
.post-row .actions{display:flex;gap:8px;flex-shrink:0;}
.post-row .actions button{
  border:1px solid var(--line);background:var(--white);border-radius:3px;padding:6px 12px;
  font-size:13px;cursor:pointer;font-family:inherit;font-weight:600;
}
.post-row .actions button.edit{color:var(--steel);}
.post-row .actions button.del{color:#B4382E;}
.admin-panel label{display:block;font-size:13px;font-weight:600;color:var(--navy);margin:14px 0 6px;}
.admin-panel label:first-child{margin-top:0;}
.admin-panel input,.admin-panel select,.admin-panel textarea{
  width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:3px;
  font-family:inherit;font-size:14.5px;background:var(--paper);
}
.admin-panel textarea{min-height:140px;resize:vertical;}
.admin-panel .field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.admin-panel .btn{border:none;cursor:pointer;font-family:inherit;margin-top:18px;margin-right:10px;}
.btn-ghost{background:var(--white);border:1px solid var(--line) !important;color:var(--navy);}
.status-msg{font-size:13.5px;color:#1E7A3E;margin-left:6px;}
.list-item{border:1px solid var(--line);border-radius:4px;padding:16px;margin-bottom:14px;background:var(--paper);}
.list-item label{margin:10px 0 4px;}
.list-item label:first-child{margin-top:0;}
.admin-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:20px;}
.admin-tabs button{
  background:var(--white);border:1px solid var(--line);color:var(--navy);padding:9px 16px;
  border-radius:4px;font-weight:600;font-size:14px;cursor:pointer;font-family:inherit;
}
.admin-tabs button.active{background:var(--navy);color:var(--white);border-color:var(--navy);}
.admin-tab-panel{display:none;}
.admin-tab-panel.active{display:block;}
.login-shell{max-width:380px;margin:80px auto;background:var(--white);border:1px solid var(--line);border-radius:4px;padding:32px;}
.save-bar{
  position:sticky;bottom:0;background:var(--white);border-top:1px solid var(--line);
  padding:16px 24px;margin:0 -24px -80px;display:flex;align-items:center;gap:12px;
  box-shadow:0 -4px 12px rgba(0,0,0,.05);
}

/* responsive */
@media (max-width:860px){
  nav.main-nav{
    position:fixed;top:0;right:-280px;width:280px;height:100vh;background:var(--navy);
    flex-direction:column;padding:80px 20px 20px;transition:right .2s ease;gap:4px;
  }
  nav.main-nav.open{right:0;}
  nav.main-nav a{color:var(--white);padding:12px 10px;}
  nav.main-nav a:hover{background:rgba(255,255,255,.1);}
  .menu-toggle{display:block;}
  .grid-3{grid-template-columns:1fr;}
  .grid-2{grid-template-columns:1fr;}
  .contact-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .stats{flex-direction:column;}
  .stat{border-left:none;border-top:1px solid var(--line);}
  .stat:first-child{border-top:none;}
  .admin-panel .field-row{grid-template-columns:1fr;}
}

/* ===== Chọn ngôn ngữ ===== */
.lang-switch{display:flex;gap:4px;margin-left:12px;flex-shrink:0;}
.lang-switch button{
  font-family:inherit;font-size:12.5px;font-weight:600;color:var(--navy);
  background:transparent;border:1px solid var(--line);border-radius:3px;
  padding:5px 9px;cursor:pointer;line-height:1;
}
.lang-switch button:hover{border-color:var(--navy);}
.lang-switch button.active{background:var(--navy);color:#fff;border-color:var(--navy);}
@media (max-width:860px){ .lang-switch{margin-left:auto;margin-right:10px;} }
html[lang="zh-CN"] body, html[lang="zh-CN"] h1, html[lang="zh-CN"] h2, html[lang="zh-CN"] h3,
html[lang="zh-CN"] .logo-text, html[lang="zh-CN"] .btn, html[lang="zh-CN"] nav.main-nav a{
  font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei','Hiragino Sans GB',Arial,sans-serif;
}

/* ===== Admin: thanh chọn ngôn ngữ ===== */
.lang-bar{
  position:sticky;top:0;z-index:20;background:#fff;border:1px solid var(--line);
  border-left:4px solid var(--amber);border-radius:4px;padding:10px 14px;margin:0 0 16px;
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
}
.lang-bar button{
  font-family:inherit;font-size:13.5px;font-weight:600;padding:7px 14px;border-radius:3px;
  border:1px solid var(--line);background:#fff;color:var(--navy);cursor:pointer;
}
.lang-bar button.active{background:var(--navy);color:#fff;border-color:var(--navy);}
.lang-bar .hint{flex-basis:100%;font-size:12.5px;color:#5A6A7B;}
.btn-ghost:disabled,.btn-amber:disabled{opacity:.55;cursor:wait;}

/* ===== Logo ảnh, mạng xã hội, ảnh/video ===== */
.logo-img{height:44px;width:auto;max-width:230px;object-fit:contain;display:block;}
.footer-logo-img{height:48px;width:auto;max-width:240px;object-fit:contain;display:block;margin-bottom:10px;}
.social-img{width:20px;height:20px;object-fit:contain;display:block;}
.social-row a .txt{font-size:10.5px;font-weight:700;line-height:1;}
.media-gallery{display:grid;gap:16px;margin:28px 0;}
.media-gallery img{width:100%;height:auto;border-radius:4px;border:1px solid var(--line);display:block;}
.media-gallery video{width:100%;border-radius:4px;background:#000;display:block;}
.media-gallery .vid{position:relative;padding-top:56.25%;}
.media-gallery .vid iframe{position:absolute;inset:0;width:100%;height:100%;border:0;border-radius:4px;}
.row-lead{display:flex;align-items:center;flex:1;min-width:0;}
.row-thumb{width:76px;height:56px;object-fit:cover;border-radius:3px;margin-right:16px;flex-shrink:0;border:1px solid var(--line);}

/* ===== Admin: tải ảnh / video ===== */
.hint{font-size:12.5px;color:#5A6A7B;margin:4px 0 10px;}
.single-img{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin:6px 0 10px;}
.single-img .prev{width:170px;height:76px;border:1px dashed #B7C2CE;border-radius:4px;display:flex;align-items:center;justify-content:center;background:#F4F6F8;font-size:12px;color:#6B7A8C;text-align:center;padding:4px;}
.single-img .prev img{max-width:100%;max-height:100%;object-fit:contain;}
.single-img .btn{margin-right:6px;}
.media-list{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:10px;}
.media-item{width:140px;border:1px solid var(--line);border-radius:4px;background:#fff;overflow:hidden;}
.media-thumb{height:92px;background:#EEF1F5;display:flex;align-items:center;justify-content:center;font-size:12px;color:#44546A;text-align:center;overflow:hidden;}
.media-thumb img,.media-thumb video{width:100%;height:100%;object-fit:cover;}
.media-ctrl{display:flex;}
.media-ctrl button{flex:1;border:none;border-top:1px solid var(--line);background:#fff;padding:6px 0;cursor:pointer;font-size:14px;}
.media-ctrl button:hover{background:#F4F6F8;}
.media-ctrl .mv-x{color:#B4382E;}
.media-actions .btn{margin-right:8px;margin-bottom:6px;}
.media-status{font-size:13px;color:#5A6A7B;}

/* ===== Menu 8 mục: luôn một hàng, thu gọn dần theo màn hình ===== */
.header-inner{max-width:1240px;gap:14px;}
.logo{flex-shrink:0;}
.logo-text,.logo-sub,nav.main-nav a{white-space:nowrap;}
nav.main-nav{flex-wrap:nowrap;}
nav.main-nav a{padding:10px 12px;font-size:14px;}
@media (max-width:1280px) and (min-width:861px){
  nav.main-nav a{padding:10px 9px;font-size:13.5px;}
  .lang-switch{margin-left:4px;}
  .lang-switch button{padding:5px 7px;}
}
@media (max-width:1140px) and (min-width:861px){
  .logo-sub{display:none;}
  .logo-text{font-size:19px;}
  nav.main-nav a{padding:10px 6px;font-size:13px;}
  .header-inner{padding-left:14px;padding-right:14px;gap:8px;}
}
@media (max-width:960px) and (min-width:861px){
  .logo svg{display:none;}
  nav.main-nav a{padding:10px 4px;font-size:12.5px;}
}