:root{
  --gold:#caa75e;
  --gold-soft:#e7c98a;
  --dark:#0b0b0b;
  --dark-2:#111;
  --light:#f5f5f1;
  --text:#e6e6e6;
  --muted:#888;
}

*{
  margin:0;
  padding:0;
  box-sizing:border-box;
}

body{
  font-family:'Inter',sans-serif;
  background:var(--dark);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
}

/* ================= NAVBAR ================= */

nav{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  padding:18px 8%;
  display:flex;
  justify-content:space-between;
  align-items:center;
  background:rgba(0,0,0,.85);
  backdrop-filter:blur(10px);
  z-index:1000;
  border-bottom:1px solid rgba(255,255,255,.06);
}

nav .logo{
  font-family:'Oswald';
  letter-spacing:3px;
  font-size:18px;
  color:var(--gold);
}

nav a{
  text-decoration:none;
  color:#aaa;
  margin-left:28px;
  font-size:13px;
  letter-spacing:2px;
  transition:.3s;
}

nav a:hover{
  color:var(--gold);
}

/* ================= HERO TITLE ================= */

.hero-small{
  margin-top:120px;
  padding:60px 20px 40px;
  text-align:center;
}

.hero-small h1{
  font-family:'Oswald';
  font-size:40px;
  color:var(--gold);
  line-height:1.3;
  max-width:900px;
  margin:0 auto;
}

.meta{
  margin-top:15px;
  font-size:14px;
  color:var(--muted);
}

/* ================= WRAPPER ================= */

.wrapper{
  max-width:820px;       /* Chuẩn báo điện tử */
  margin:40px auto 120px;
  padding:0 20px;
}

/* ================= ARTICLE ================= */

.article-box{
  border-bottom:1px solid rgba(255,255,255,.08);
  padding-bottom:50px;
}

.article-box p{
  font-size:19px;
  line-height:1.95;
  margin-bottom:26px;
  color:var(--text);
}

.article-box strong{
  color:var(--gold-soft);
}

.article-box h2{
  font-family:'Oswald';
  font-size:26px;
  margin:55px 0 25px;
  color:var(--gold);
  letter-spacing:1px;
}

.article-box h3{
  font-size:21px;
  margin:40px 0 18px;
  color:var(--gold-soft);
}

.article-box a{
  color:var(--gold);
  text-decoration:none;
}

.article-box a:hover{
  text-decoration:underline;
}

.back-link{
  display:inline-block;
  margin-top:40px;
  font-size:15px;
  color:var(--gold);
  text-decoration:none;
}

.back-link:hover{
  text-decoration:underline;
}

/* ================= RELATED ================= */

.related{
  margin-top:90px;
}

.related h2{
  font-family:'Oswald';
  font-size:28px;
  margin-bottom:35px;
  color:var(--gold);
}

.card-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:25px;
}

.card{
  background:var(--dark-2);
  padding:25px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.06);
  transition:.35s ease;
}

.card:hover{
  transform:translateY(-6px);
  box-shadow:0 10px 35px rgba(202,167,94,.2);
  border-color:rgba(202,167,94,.4);
}

.card a{
  text-decoration:none;
  color:var(--light);
  font-weight:600;
  line-height:1.5;
  display:block;
}

.card a:hover{
  color:var(--gold);
}

/* ================= FOOTER ================= */

footer{
  text-align:center;
  padding:60px 20px;
  color:#666;
  border-top:1px solid rgba(255,255,255,.08);
  font-size:14px;
}

/* ================= RESPONSIVE ================= */

@media(max-width:768px){

  nav{
    padding:15px 5%;
  }

  nav a{
    margin-left:15px;
    font-size:12px;
  }

  .hero-small{
    padding:40px 20px;
  }

  .hero-small h1{
    font-size:28px;
  }

  .wrapper{
    margin-top:20px;
  }

  .article-box p{
    font-size:17px;
    line-height:1.85;
  }

}