/* ============================================================
   ECO AGENT — Site-wide navigation (ecn-*)
   File: /site-nav.css  — dùng chung cho mọi trang
   ============================================================ */

.ecn-header,
.ecn-drawer,
.ecn-backdrop{
  --ecn-primary:#ef4e2e;
  --ecn-primary-dark:#d83a1c;
  --ecn-secondary:#f7821d;
  --ecn-bg:rgba(255,255,255,.88);
  --ecn-card:#ffffff;
  --ecn-text:#1e293b;
  --ecn-muted:#64748b;
  --ecn-border:rgba(15,23,42,.10);
  --ecn-hover:rgba(239,78,46,.09);
  --ecn-shadow:0 18px 44px rgba(15,23,42,.14);
  position:sticky;
  top:0;
  z-index:950;
  background:var(--ecn-bg);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--ecn-border);
  transition:box-shadow .25s ease,background .25s ease;
  font-family:inherit;
}
html[data-theme=dark] .ecn-header,
html[data-theme=dark] .ecn-drawer,
html[data-theme=dark] .ecn-backdrop{
  --ecn-bg:rgba(9,13,22,.88);
  --ecn-card:#111827;
  --ecn-text:#f3f4f6;
  --ecn-muted:#9ca3af;
  --ecn-border:rgba(255,255,255,.10);
  --ecn-hover:rgba(239,78,46,.16);
  --ecn-shadow:0 18px 44px rgba(0,0,0,.5);
}
.ecn-header.ecn-scrolled{box-shadow:0 6px 24px rgba(15,23,42,.09)}
html[data-theme=dark] .ecn-header.ecn-scrolled{box-shadow:0 6px 24px rgba(0,0,0,.45)}
.ecn-header *,.ecn-header *::before,.ecn-header *::after,
.ecn-drawer *,.ecn-drawer *::before,.ecn-drawer *::after{box-sizing:border-box}
.ecn-header a,.ecn-drawer a{text-decoration:none;color:inherit}
.ecn-header button,.ecn-drawer button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}

.ecn-inner{
  max-width:1240px;
  margin:0 auto;
  padding:0 20px;
  min-height:66px;
  display:flex;
  align-items:center;
  gap:14px;
}

/* ---------- logo ---------- */
.ecn-logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.ecn-logo img{width:34px;height:34px;display:block;border-radius:8px}
.ecn-logo span{
  white-space:nowrap;
  font-size:20px;
  font-weight:800;
  letter-spacing:-.5px;
  background:linear-gradient(135deg,var(--ecn-text),var(--ecn-primary));
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}

/* ---------- desktop menu ---------- */
.ecn-menu{display:flex;align-items:center;gap:2px;margin-left:auto}
.ecn-item{position:relative}
.ecn-link{
  display:flex;align-items:center;gap:6px;
  padding:9px 13px;border-radius:10px;
  font-size:15.5px;font-weight:600;line-height:1.2;
  color:var(--ecn-text);
  transition:background .18s,color .18s;
  white-space:nowrap;
}
.ecn-link:hover,.ecn-item.ecn-open>.ecn-link{background:var(--ecn-hover);color:var(--ecn-primary-dark)}
html[data-theme=dark] .ecn-link:hover,html[data-theme=dark] .ecn-item.ecn-open>.ecn-link{color:#ffb9a8}
.ecn-link.ecn-active{color:var(--ecn-primary-dark);background:var(--ecn-hover)}
.ecn-caret{width:14px;height:14px;flex:0 0 auto;transition:transform .2s}
.ecn-item.ecn-open>.ecn-link .ecn-caret{transform:rotate(180deg)}

/* ---------- dropdown ---------- */
.ecn-drop{
  position:absolute;
  top:calc(100% + 10px);
  left:0;
  width:400px;
  max-width:min(400px,92vw);
  padding:8px;
  background:var(--ecn-card);
  border:1px solid var(--ecn-border);
  border-radius:18px;
  box-shadow:var(--ecn-shadow);
  opacity:0;
  visibility:hidden;
  transform:translateY(-8px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s;
  z-index:950;
}
.ecn-item.ecn-open>.ecn-drop{opacity:1;visibility:visible;transform:translateY(0)}
@media (hover:hover) and (min-width:982px){
  .ecn-item:hover>.ecn-drop{opacity:1;visibility:visible;transform:translateY(0)}
}
.ecn-drop-row{display:flex;gap:12px;align-items:flex-start;padding:11px 12px;border-radius:13px;transition:background .16s}
.ecn-drop-row:hover{background:var(--ecn-hover)}
.ecn-ico{
  flex:0 0 auto;width:38px;height:38px;border-radius:11px;
  display:flex;align-items:center;justify-content:center;font-size:19px;
  background:linear-gradient(135deg,rgba(239,78,46,.14),rgba(247,130,29,.14));
  border:1px solid var(--ecn-border);
}
.ecn-tx{display:block;min-width:0}
.ecn-tx b{display:block;font-size:15px;font-weight:700;line-height:1.35;color:var(--ecn-text)}
.ecn-tx i{display:block;font-style:normal;font-size:13px;color:var(--ecn-muted);margin-top:2px;line-height:1.4}
.ecn-tx em{
  display:inline-block;font-style:normal;font-size:12px;font-weight:700;
  color:var(--ecn-primary-dark);background:var(--ecn-hover);
  padding:1px 8px;border-radius:999px;margin-left:6px;white-space:nowrap;
}
.ecn-drop-foot{
  display:flex;justify-content:space-between;align-items:center;gap:10px;
  margin-top:6px;padding:9px 12px;border-top:1px solid var(--ecn-border);
  font-size:13.5px;color:var(--ecn-muted);
}
.ecn-drop-foot a{color:var(--ecn-primary-dark);font-weight:700}

/* ---------- actions ---------- */
.ecn-actions{display:flex;align-items:center;gap:8px;flex:0 1 auto;min-width:0}
.ecn-search{position:relative;flex:0 1 210px;min-width:44px;width:210px}
.ecn-input{
  width:100%;height:40px;padding:0 34px 0 36px;
  border:1.5px solid var(--ecn-border);border-radius:999px;
  background:var(--ecn-card);color:var(--ecn-text);
  font-family:inherit;font-size:14.5px;outline:none;
  text-overflow:ellipsis;
  transition:border-color .2s,box-shadow .2s;
}
.ecn-input::-webkit-search-cancel-button{display:none}
.ecn-input:focus{border-color:var(--ecn-primary);box-shadow:0 0 0 3px rgba(239,78,46,.14)}
.ecn-input::placeholder{color:var(--ecn-muted)}
.ecn-search-ico{
  position:absolute;left:12px;top:50%;transform:translateY(-50%);
  width:16px;height:16px;stroke:var(--ecn-muted);fill:none;
  stroke-width:2.4;stroke-linecap:round;pointer-events:none;
}
.ecn-clear{
  position:absolute;right:8px;top:50%;transform:translateY(-50%);
  width:20px;height:20px;border-radius:999px;padding:0;
  background:var(--ecn-border);color:var(--ecn-muted);
  font-size:11px;line-height:1;display:none;align-items:center;justify-content:center;
}
.ecn-clear:hover{background:var(--ecn-primary);color:#fff}
.ecn-results{
  position:absolute;top:calc(100% + 8px);right:0;
  width:min(390px,calc(100vw - 24px));
  max-height:min(420px,62vh);overflow-y:auto;
  background:var(--ecn-card);border:1px solid var(--ecn-border);
  border-radius:16px;box-shadow:var(--ecn-shadow);
  display:none;z-index:960;text-align:left;
}
.ecn-results.ecn-open{display:block}
.ecn-results .ecn-rcount{
  padding:9px 15px;font-size:12px;font-weight:600;color:var(--ecn-muted);
  border-bottom:1px solid var(--ecn-border);background:var(--ecn-hover);
}
.ecn-ritem{
  display:block;padding:11px 15px;font-size:14.5px;color:var(--ecn-text);
  border-bottom:1px solid var(--ecn-border);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.ecn-ritem:last-child{border-bottom:0}
.ecn-ritem:hover,.ecn-ritem.ecn-hl{background:var(--ecn-hover)}
.ecn-ritem mark{background:none;color:var(--ecn-primary-dark);font-weight:800;padding:0}
html[data-theme=dark] .ecn-ritem mark{color:#ffb9a8}
.ecn-rempty{padding:18px;text-align:center;color:var(--ecn-muted);font-size:14px}

.ecn-iconbtn{
  position:relative;flex:0 0 auto;
  width:40px;height:40px;border-radius:999px;
  display:flex;align-items:center;justify-content:center;
  color:var(--ecn-text);
  transition:background .18s;
}
.ecn-iconbtn:hover{background:var(--ecn-hover)}
.ecn-iconbtn svg{width:19px;height:19px}
.ecn-badge{
  position:absolute;top:-2px;right:-2px;
  min-width:18px;height:18px;padding:0 4px;
  display:none;align-items:center;justify-content:center;
  background:var(--ecn-primary);color:#fff;
  font-size:11px;font-weight:700;border-radius:999px;
}
.ecn-cta{
  flex:0 0 auto;white-space:nowrap;
  padding:10px 18px;border-radius:999px;
  background:linear-gradient(135deg,var(--ecn-primary),var(--ecn-secondary));
  color:#fff!important;font-size:14.5px;font-weight:700;
  box-shadow:0 6px 16px rgba(239,78,46,.28);
  transition:transform .2s,box-shadow .2s;
}
.ecn-cta:hover{transform:translateY(-1px);box-shadow:0 10px 22px rgba(239,78,46,.36)}
.ecn-burger{
  display:none;flex:0 0 auto;
  width:42px;height:42px;border-radius:12px;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
  transition:background .18s;
}
.ecn-burger:hover{background:var(--ecn-hover)}
.ecn-burger span{display:block;width:20px;height:2px;border-radius:2px;background:var(--ecn-text);transition:transform .25s,opacity .2s}
.ecn-burger[aria-expanded=true] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.ecn-burger[aria-expanded=true] span:nth-child(2){opacity:0}
.ecn-burger[aria-expanded=true] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- mobile drawer ---------- */
.ecn-drawer{
  font-family:inherit;
  position:fixed;left:0;right:0;top:0;
  z-index:940;
  padding:78px 14px 18px;
  background:var(--ecn-card);
  border-bottom:1px solid var(--ecn-border);
  box-shadow:0 24px 48px rgba(15,23,42,.18);
  border-radius:0 0 22px 22px;
  max-height:100vh;overflow-y:auto;
  transform:translateY(-102%);
  transition:transform .3s cubic-bezier(.4,0,.2,1);
}
.ecn-drawer[hidden]{display:none}
.ecn-drawer.ecn-open{transform:translateY(0)}
.ecn-drawer-in{display:flex;flex-direction:column;gap:6px;max-width:560px;margin:0 auto}
.ecn-dclose{
  align-self:flex-end;
  display:inline-flex;align-items:center;gap:6px;
  padding:8px 14px;border-radius:999px;
  background:var(--ecn-hover);color:var(--ecn-text);
  font-size:14px;font-weight:600;
}
.ecn-dclose:hover{background:var(--ecn-primary);color:#fff}
.ecn-dgroup{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  width:100%;text-align:left;
  padding:13px 14px;border-radius:12px;
  font-size:16px;font-weight:700;color:var(--ecn-text);
  background:var(--ecn-hover);
}
.ecn-dgroup[aria-expanded=true] .ecn-caret{transform:rotate(180deg)}
.ecn-dsub{display:none;flex-direction:column;gap:2px;padding:4px 0 6px}
.ecn-dsub.ecn-open{display:flex}
.ecn-dsub a{display:block;padding:10px 14px;border-radius:10px;font-size:15px;color:var(--ecn-text)}
.ecn-dsub a:hover{background:var(--ecn-hover)}
.ecn-dsub a small{display:block;color:var(--ecn-muted);font-size:12.5px;margin-top:1px}
.ecn-dlink{
  display:block;padding:13px 14px;border-radius:12px;
  font-size:16px;font-weight:600;color:var(--ecn-text);
}
.ecn-dlink:hover{background:var(--ecn-hover)}
.ecn-dcta{
  margin-top:6px;padding:14px;border-radius:14px;text-align:center;
  background:linear-gradient(135deg,var(--ecn-primary),var(--ecn-secondary));
  color:#fff!important;font-weight:700;font-size:16px;
  box-shadow:0 8px 20px rgba(239,78,46,.28);
}
.ecn-backdrop{
  position:fixed;inset:0;z-index:930;
  background:rgba(9,13,22,.45);
  -webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);
  opacity:0;transition:opacity .25s;
}
.ecn-backdrop[hidden]{display:none}
.ecn-backdrop.ecn-open{opacity:1}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .ecn-search{flex:0 1 170px;width:170px}
  .ecn-link{padding:9px 10px;font-size:15px}
  .ecn-inner{gap:10px}
}
@media (max-width:1024px){
  .ecn-cta{padding:10px 14px;font-size:14px}
  .ecn-menu .ecn-link{font-size:14.5px;padding:9px 9px}
}
@media (max-width:981px){
  .ecn-menu{display:none}
  .ecn-burger{display:flex}
  .ecn-logo{margin-right:auto}
  .ecn-search{flex:1 1 auto;width:auto;max-width:260px}
}
@media (max-width:560px){
  .ecn-inner{padding:0 12px;min-height:60px;gap:6px}
  .ecn-logo span{display:none}
  .ecn-logo img{width:32px;height:32px}
  .ecn-search{max-width:none}
  .ecn-input{height:38px;padding:0 30px 0 33px;font-size:14.5px}
  .ecn-iconbtn{width:38px;height:38px}
  .ecn-iconbtn svg{width:18px;height:18px}
  .ecn-cta{display:none}
  .ecn-drawer{padding-top:70px}
}
@media (prefers-reduced-motion:reduce){
  .ecn-header *,.ecn-drawer{transition:none!important}
}

/* tránh xung đột với các rule header cũ của trang */
.ecn-header{overflow:visible}

/* ---------- content guard: bảng không tràn ngang trên mobile ---------- */
@media (max-width:768px){
  article table,.post-content table,.entry-content table{
    display:block;width:100%;max-width:100%;
    overflow-x:auto;-webkit-overflow-scrolling:touch;
  }
}