/* ================= THEME ================= */
:root{
  --blue-1:#005baa;
  --blue-2:#003366;
  --blue-3:#0b4a78;
  --yellow:#ffcc00;
  --text:#1f2937;
  --muted:#6b7280;
  --card:#ffffff;
  --bg:#f5f7fb;
  --border:#e5e7eb;
  --shadow:0 10px 25px rgba(0,0,0,.08);
  --shadow-sm:0 3px 10px rgba(0,0,0,.06);
}

/* ================= RESET ================= */
*{margin:0;padding:0;box-sizing:border-box;font-family:Arial,sans-serif}
body{background:var(--bg);color:var(--text);line-height:1.6}
a{color:inherit}
img{max-width:100%;display:block}

/* ================= LAYOUT ================= */
.container{max-width:1200px;margin:24px auto;padding:0 15px}
.header-container,
.nav-container,
.footer-container{max-width:1200px;margin:auto;padding:0 15px}

/* ================= HEADER ================= */
.site-header{
  background:var(--blue-1);
  color:#fff;
  padding:12px 0;
  box-shadow:0 2px 10px rgba(0,0,0,.1);
}
.logo{display:flex;align-items:center;gap:14px}
.logo img{height:58px;width:auto}
.logo-text h1{font-size:18px;letter-spacing:.2px}
.logo-text p{font-size:14px;opacity:.95}

.header-container{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:14px;
  flex-wrap:wrap;
}
.search-login{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.search-box{position:relative}
.search-box input{
  width:260px;
  padding:10px 40px 10px 14px;
  border:none;
  border-radius:999px;
  outline:none;
}
.search-box button{
  position:absolute;
  right:10px;top:50%;
  transform:translateY(-50%);
  border:none;background:none;
  color:var(--blue-1);
  cursor:pointer;
}
.login-btn{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--yellow);
  color:#1a1a1a;
  text-decoration:none;
  padding:10px 14px;
  border-radius:10px;
  font-weight:700;
}

/* ================= NAV (sticky) ================= */
.site-nav{
  background:var(--blue-2);
  position:sticky;
  top:0;
  z-index:50;
}
.main-menu{
  list-style:none;
  display:flex;
  flex-wrap:wrap;
  gap:2px;
}
.main-menu a{
  display:block;
  padding:12px 14px;
  color:#fff;
  text-decoration:none;
  border-radius:10px;
  transition:background .15s;
  white-space:nowrap;
}
.main-menu a:hover{background:rgba(255,255,255,.12)}
.main-menu a.active{background:rgba(255,255,255,.18)}

/* ================= BANNER (AUTO CO + 2 LỚP) ================= */
/* Banner tự co: dùng clamp() cho chiều cao theo màn hình */
.banner{
  position:relative;
  height:clamp(220px, 32vw, 420px); /* min - theo vw - max */
  overflow:hidden;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
}

/* Nền mờ phủ kín */
.banner-bg{
  position:absolute;
  inset:0;
  background:url('../images/banner3.png') center/cover no-repeat;
  filter:blur(14px);
  transform:scale(1.1);
}

/* Lớp phủ tối nhẹ để chữ dễ đọc */
.banner::before{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(to bottom, rgba(0,0,0,.25), rgba(0,0,0,.35));
  z-index:1;
}

/* Ảnh chính nhìn đủ tòa nhà */
.banner-main{
  position:absolute;
  inset:0;
  background:url('../images/banner3.png') center/contain no-repeat;
  z-index:2;
}

/* Nội dung banner */
.banner-content{
  position:relative;
  z-index:3;
  padding:0 16px;
  max-width:1000px;
}
.banner-content h2{
  display:inline-block;
  background:rgba(0,0,0,.42);
  color:#fff;
  padding:12px 18px;
  border-radius:14px;
  font-size:clamp(16px, 2.2vw, 30px);
  text-transform:uppercase;
  letter-spacing:.2px;
}
.banner-content p{
  margin:10px auto 0;
  color:rgba(255,255,255,.95);
  font-size:clamp(13px, 1.3vw, 16px);
  max-width:720px;
}
.banner-actions{
  margin-top:14px;
  display:flex;
  justify-content:center;
  gap:10px;
  flex-wrap:wrap;
}

/* ================= BUTTONS ================= */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 14px;
  border-radius:12px;
  text-decoration:none;
  font-weight:700;
  border:1px solid transparent;
  box-shadow:var(--shadow-sm);
}
.btn-primary{
  background:var(--yellow);
  color:#1a1a1a;
}
.btn-ghost{
  background:rgba(255,255,255,.15);
  border-color:rgba(255,255,255,.35);
  color:#fff;
}
.w-100{width:100%}

/* ================= NOTICE ================= */
.notice{
  background:var(--yellow);
  border-radius:14px;
  overflow:hidden;
  display:flex;
  align-items:stretch;
  box-shadow:var(--shadow-sm);
  margin-bottom:18px;
}
.notice-left{
  background:rgba(0,0,0,.08);
  padding:10px 12px;
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:800;
}
.notice-right{
  padding:10px 12px;
  flex:1;
  font-weight:700;
}

/* ================= GRID / CARD ================= */
.grid-3{
  display:grid;
  grid-template-columns: 1.2fr 1.2fr .9fr;
  gap:16px;
  align-items:start;
}
.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:16px;
  padding:16px;
  box-shadow:var(--shadow);
}
.card-title{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:18px;
  color:var(--blue-1);
  padding-bottom:10px;
  margin-bottom:12px;
  border-bottom:2px solid rgba(0,91,170,.25);
}

/* Quick links */
.quick-links{
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:10px;
}
.qbtn{
  display:flex;
  align-items:center;
  gap:10px;
  padding:12px;
  border:1px solid var(--border);
  border-radius:14px;
  text-decoration:none;
  background:#fff;
  transition:transform .08s, box-shadow .08s, border-color .08s;
}
.qbtn i{color:var(--blue-1);width:18px;text-align:center}
.qbtn:hover{
  transform:translateY(-1px);
  box-shadow:var(--shadow-sm);
  border-color:rgba(0,91,170,.25);
}

/* News */
.news-list{list-style:none}
.news-list li{padding:10px 0;border-bottom:1px dashed var(--border)}
.news-list li:last-child{border-bottom:none}
.news-list a{
  text-decoration:none;
  color:var(--blue-2);
  font-weight:800;
}
.news-meta{
  margin-top:4px;
  font-size:13px;
  color:var(--muted);
  display:flex;
  align-items:center;
  gap:8px;
}
.link-more{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-top:10px;
  color:var(--blue-1);
  text-decoration:none;
  font-weight:800;
}

/* Support */
.support{display:flex;flex-direction:column;gap:10px}
.support-item{
  display:flex;
  gap:12px;
  padding:12px;
  border:1px solid var(--border);
  border-radius:14px;
  background:#fff;
}
.support-item i{color:var(--blue-1);font-size:18px;margin-top:2px;width:22px;text-align:center}
.support-label{font-size:12px;color:var(--muted);font-weight:700}
.support-value{font-size:14px;font-weight:800;color:#111827}

/* ================= FOOTER ================= */
.site-footer{
  background:var(--blue-2);
  color:#fff;
  margin-top:26px;
}
.footer-container{
  padding:26px 15px;
  display:grid;
  grid-template-columns:2fr 1fr 1fr;
  gap:18px;
}
.site-footer h3{margin-bottom:12px;font-size:16px}
.footer-info p{margin:8px 0;opacity:.96}
.footer-info i{width:18px;display:inline-block}
.footer-links ul{list-style:none}
.footer-links li{margin-bottom:10px}
.footer-links a{color:#fff;text-decoration:none;opacity:.95}
.footer-links a:hover{text-decoration:underline;opacity:1}
.footer-map iframe{width:100%;height:200px;border:none;border-radius:14px}
.copyright{
  text-align:center;
  padding:14px 10px;
  border-top:1px solid rgba(255,255,255,.2);
  font-size:14px;
  opacity:.95;
}

/* ================= RESPONSIVE ================= */
@media (max-width: 980px){
  .grid-3{grid-template-columns:1fr 1fr}
}
@media (max-width: 768px){
  .header-container{flex-direction:column;align-items:stretch}
  .search-box input{width:100%}
  .search-login{width:100%}
  .main-menu{flex-direction:column}
  .grid-3{grid-template-columns:1fr}
  .quick-links{grid-template-columns:1fr}
  .banner-actions .btn{width:100%}
}