/* ============================================
   GROUP MEDEA — Bảng màu Xanh Lục Đậm + Vàng Gold
   ============================================ */
:root{
  --xanh-dam:#1B3226;
  --xanh-dam2:#142720;
  --xanh-nhat:#2E4A3A;
  --vang:#C9A227;
  --vang-sang:#D9B65A;
  --kem:#F6F4EC;
  --kem-toi:#EFEADA;
  --chu-dam:#20301F;
  --chu-than:#3E4A38;
  --vien:#E1DBC6;
  --trang:#FFFFFF;
  --font-tieu-de:'EB Garamond', Georgia, serif;
  --font-than:'Quicksand', sans-serif;
  --khung:1000px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-than);
  color:var(--chu-than);
  background:var(--kem);
  line-height:1.75;
  font-size:16px;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4{font-family:var(--font-tieu-de);color:var(--chu-dam);font-weight:600;margin:0 0 .5em;}

.khung{max-width:var(--khung);margin:0 auto;padding:0 20px;}

/* ===== HEADER ===== */
.dau-trang{
  background:var(--xanh-dam);
  border-bottom:2px solid var(--vang);
}
.thanh-dieu-huong{
  max-width:var(--khung);
  margin:0 auto;
  padding:16px 20px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.logo{
  font-family:var(--font-tieu-de);
  font-size:22px;
  color:var(--vang-sang);
  letter-spacing:1px;
}
.menu{display:flex;gap:26px;list-style:none;margin:0;padding:0;}
.menu a{
  color:var(--kem);
  font-size:14.5px;
  letter-spacing:.3px;
  transition:color .2s;
  padding:6px 0;
  border-bottom:2px solid transparent;
}
.menu a:hover,.menu a.active{color:var(--vang-sang);border-bottom-color:var(--vang);}
.nut-menu-di-dong{display:none;background:none;border:1px solid var(--vang);color:var(--vang-sang);
  font-size:22px;padding:4px 12px;border-radius:6px;cursor:pointer;}

/* ===== HERO / KHỐI MỞ ĐẦU ===== */
.hero{
  background:var(--xanh-dam);
  position:relative;
  overflow:hidden;
  padding:56px 0 80px;
}
.mui-tam-giac{
  position:absolute;inset:0;
  opacity:.10;
  background:
    linear-gradient(135deg,transparent 48%,var(--vang) 49%,transparent 51%),
    linear-gradient(-135deg,transparent 48%,var(--vang) 49%,transparent 51%);
  background-size:140px 140px;
  pointer-events:none;
}
.hero .khung{position:relative;z-index:1;}
.hero-hang{display:flex;align-items:center;gap:50px;flex-wrap:wrap;}
.hero-chu{flex:1 1 400px;}
.hero-nhan{
  color:var(--vang-sang);
  font-size:13px;
  letter-spacing:4px;
  font-weight:600;
  margin-bottom:10px;
}
.hero-tieu-de{
  color:var(--kem);
  font-size:44px;
  margin-bottom:18px;
}
.hero-mo-ta{color:#D8DECF;font-size:16px;margin-bottom:26px;max-width:520px;}
.hero-nut{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:18px;}
.nut{
  display:inline-block;
  padding:12px 26px;
  border-radius:6px;
  font-size:14.5px;
  font-weight:600;
  cursor:pointer;
  transition:transform .15s, opacity .15s;
  border:2px solid transparent;
}
.nut:hover{transform:translateY(-2px);}
.nut-vang{background:var(--vang);color:var(--xanh-dam);}
.nut-vien{background:transparent;border-color:var(--vang);color:var(--vang-sang);}
.hero-luu-y{color:#B9C3AA;font-size:13px;font-style:italic;}
.hero-anh{flex:0 1 380px;margin-right:-40px;}
.hero-anh img{border-radius:10px;box-shadow:0 20px 50px rgba(0,0,0,.35);}

@media(max-width:760px){
  .hero-anh{margin-right:0;order:-1;flex:1 1 100%;}
  .hero-tieu-de{font-size:32px;}
}

/* ===== KHỐI TÓM TẮT (ảnh trái - chữ phải) ===== */
.tom-tat{background:var(--kem);padding:70px 0;}
.tom-tat-hang{display:flex;align-items:center;gap:50px;flex-wrap:wrap;}
.tom-tat-anh{flex:0 1 380px;margin-left:-40px;}
.tom-tat-anh img{border-radius:10px;box-shadow:0 16px 40px rgba(27,50,38,.18);}
.tom-tat-chu{flex:1 1 400px;}
.nhan-nho{color:var(--vang);font-size:13px;letter-spacing:3px;font-weight:700;margin-bottom:10px;}
.tom-tat-chu h2{font-size:30px;margin-bottom:16px;}
.tom-tat-chu p{margin-bottom:22px;color:var(--chu-than);}

@media(max-width:760px){
  .tom-tat-anh{margin-left:0;order:-1;flex:1 1 100%;}
}

/* ===== 2 THẺ LIÊN KẾT LỚN ===== */
.hai-lien-ket{background:var(--kem-toi);padding:50px 0 60px;}
.luoi-lien-ket{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.the-lien-ket{
  background:var(--trang);
  border:1px solid var(--vien);
  border-radius:12px;
  padding:34px 28px;
  transition:transform .2s, box-shadow .2s;
  border-top:3px solid var(--vang);
}
.the-lien-ket:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(27,50,38,.15);}
.the-lien-ket h3{font-size:20px;margin-bottom:8px;}
.the-lien-ket span{color:var(--vang);font-weight:700;font-size:14px;}
.the-lien-ket p{color:var(--chu-than);font-size:14.5px;margin-top:8px;}
@media(max-width:640px){.luoi-lien-ket{grid-template-columns:1fr;}}

/* ===== DẢI TRANG TRÍ VÀNG ===== */
.dai-trang-tri{
  height:120px;
  background:
    linear-gradient(135deg,var(--xanh-dam) 0%,var(--xanh-nhat) 50%,var(--xanh-dam) 100%);
  border-top:2px solid var(--vang);
  border-bottom:2px solid var(--vang);
  display:flex;align-items:center;justify-content:center;
  position:relative;
}
.dai-trang-tri::before,.dai-trang-tri::after{
  content:"❋";color:var(--vang);font-size:22px;
  margin:0 24px;
}
.dai-trang-tri span{
  color:var(--vang-sang);
  font-family:var(--font-tieu-de);
  font-style:italic;
  font-size:19px;
  letter-spacing:1px;
  text-align:center;
  padding:0 20px;
}

/* ===== BLOG ===== */
.khu-blog{padding:70px 0 90px;background:var(--kem);}
.tieu-de-khu{text-align:center;margin-bottom:44px;}
.tieu-de-khu h2{font-size:32px;}
.tieu-de-khu .gach{width:60px;height:3px;background:var(--vang);margin:14px auto 0;}

.bai-viet{
  display:flex;gap:26px;
  padding:26px 0;
  border-bottom:1px solid var(--vien);
  align-items:flex-start;
}
.bai-viet:last-child{border-bottom:none;}
.bai-viet-anh{flex:0 0 220px;}
.bai-viet-anh img{border-radius:8px;aspect-ratio:4/3;object-fit:cover;}
.bai-viet-noi-dung{flex:1;min-width:0;}
.bai-viet-noi-dung h3{font-size:22px;margin-bottom:6px;}
.bai-viet-meta{font-size:12.5px;color:#8A8A78;margin-bottom:10px;}
.bai-viet-tom-tat{color:var(--chu-than);font-size:15px;margin-bottom:10px;}
.doc-them{
  color:var(--vang);
  font-weight:700;
  font-size:14px;
  cursor:pointer;
  border-bottom:1px solid var(--vang);
  padding-bottom:1px;
}
@media(max-width:640px){
  .bai-viet{flex-direction:column;}
  .bai-viet-anh{flex:1 1 auto;width:100%;}
}

/* nội dung đầy đủ bài viết (details/summary) */
details.bai-viet-day-du{margin-top:16px;}
details.bai-viet-day-du summary{list-style:none;cursor:pointer;}
details.bai-viet-day-du summary::-webkit-details-marker{display:none;}
.than-bai{
  margin-top:18px;
  padding:24px 28px;
  background:var(--trang);
  border:1px solid var(--vien);
  border-left:4px solid var(--vang);
  border-radius:8px;
}
.than-bai p{margin:0 0 16px;color:var(--chu-than);}
.than-bai h4{font-size:17px;color:var(--xanh-dam);margin:26px 0 12px;}
.than-bai blockquote{
  margin:18px 0;
  padding:16px 20px;
  background:var(--kem-toi);
  border-left:3px solid var(--vang);
  font-family:var(--font-tieu-de);
  font-style:italic;
  color:var(--xanh-dam);
  border-radius:4px;
}
.than-bai blockquote cite{display:block;margin-top:8px;font-size:13px;font-style:normal;color:var(--vang);}
.than-bai .o-danh-dau{display:flex;gap:10px;align-items:flex-start;margin:10px 0;font-size:14.5px;}
.than-bai .dong-trong{
  display:block;border-bottom:1px solid var(--vien);height:26px;margin:6px 0;
}
.than-bai .anh-cuoi-bai{margin-top:20px;border-radius:8px;overflow:hidden;}
.than-bai .ky-ten{text-align:right;font-style:italic;color:var(--vang);margin-top:20px;}

/* ===== FOOTER ===== */
.chan-trang{background:var(--xanh-dam2);color:#C9CFC0;padding:50px 0 0;}
.chan-trang-hang{display:flex;justify-content:space-between;flex-wrap:wrap;gap:30px;padding-bottom:40px;}
.chan-trang-logo{font-family:var(--font-tieu-de);color:var(--vang-sang);font-size:22px;}
.chan-trang-menu{display:flex;gap:22px;flex-wrap:wrap;list-style:none;padding:0;margin:0;}
.chan-trang-menu a{font-size:14px;}
.chan-trang-menu a:hover{color:var(--vang-sang);}
.chan-trang-duoi{
  border-top:1px solid #24382C;
  text-align:center;padding:18px 0;
  font-size:12.5px;color:#8B9584;
}
@media(max-width:640px){
  .chan-trang-hang{flex-direction:column;align-items:center;text-align:center;}
}

/* ===== TRANG CON (Điểm Tin / Nhu Cầu / Cầu Nối) ===== */
.tieu-de-trang{
  background:var(--xanh-dam);
  padding:44px 0;
  text-align:center;
  border-bottom:2px solid var(--vang);
}
.tieu-de-trang h1{color:var(--kem);font-size:36px;margin-bottom:8px;}
.tieu-de-trang p{color:#C6CFB9;font-size:14.5px;margin:0;}
.than-trang{padding:50px 0 80px;}
.than-trang h2{font-size:22px;margin:34px 0 14px;color:var(--xanh-dam);}
.than-trang h3{font-size:18px;margin:22px 0 10px;}
.than-trang p{margin:0 0 14px;}
.ghi-chu-o{
  background:var(--kem-toi);
  border:1px solid var(--vien);
  border-left:4px solid var(--vang);
  border-radius:8px;
  padding:18px 22px;
  font-size:14.5px;
  color:var(--chu-than);
  margin:20px 0;
}
.anh-giua-trang{margin:30px 0;border-radius:10px;overflow:hidden;}
.danh-muc-muc{
  background:var(--trang);
  border:1px solid var(--vien);
  border-radius:8px;
  padding:18px 22px;
  margin-bottom:14px;
}
.danh-muc-muc .cau-hoi{font-weight:600;color:var(--xanh-dam);margin-bottom:8px;}
.danh-muc-muc .mo-ta-vung{
  min-height:44px;border:1px dashed var(--vien);border-radius:6px;
  padding:10px 12px;color:#9A9A88;font-size:14px;background:var(--kem);
}
.ngay-cap-nhat{
  display:inline-block;background:var(--vang);color:var(--xanh-dam);
  font-weight:700;font-size:13px;padding:5px 14px;border-radius:20px;margin-bottom:20px;
}

/* ===== CÂY BÚT SỬA ===== */
.nut-but{
  position:fixed;bottom:26px;right:26px;
  width:52px;height:52px;border-radius:50%;
  background:var(--vang);color:var(--xanh-dam);
  display:flex;align-items:center;justify-content:center;
  font-size:22px;cursor:pointer;border:none;
  box-shadow:0 8px 22px rgba(0,0,0,.25);
  z-index:100;
}
.hop-sua{
  display:none;
  background:var(--trang);border:1px solid var(--vien);
  border-radius:10px;padding:26px;margin:26px 0;
}
.hop-sua.mo{display:block;}
.hop-sua label{display:block;font-weight:700;color:var(--xanh-dam);margin-bottom:6px;font-size:14px;}
.hop-sua input[type=password], .hop-sua textarea{
  width:100%;padding:12px 14px;border:1px solid var(--vien);border-radius:6px;
  font-family:var(--font-than);font-size:15px;margin-bottom:16px;
}
.hop-sua textarea{min-height:340px;line-height:1.6;resize:vertical;}
.hop-sua .nut-luu{background:var(--vang);color:var(--xanh-dam);border:none;padding:12px 28px;
  border-radius:6px;font-weight:700;cursor:pointer;font-size:14.5px;}
.hop-sua .nut-huy{background:transparent;border:1px solid var(--vien);color:#777;padding:12px 22px;
  border-radius:6px;cursor:pointer;font-size:14.5px;margin-left:10px;}

/* ===== CẦU NỐI ===== */
.the-cau-noi{
  background:var(--trang);border:1px solid var(--vien);border-radius:12px;
  padding:40px 30px;text-align:center;margin-bottom:26px;border-top:3px solid var(--vang);
}
.the-cau-noi .icon{
  width:70px;height:70px;border-radius:50%;background:var(--xanh-dam);
  display:flex;align-items:center;justify-content:center;margin:0 auto 18px;
  font-size:30px;color:var(--vang-sang);
}
.the-cau-noi h3{font-size:18px;margin-bottom:14px;}
.the-cau-noi a.duong-dan{
  display:inline-block;word-break:break-all;color:var(--xanh-dam);
  background:var(--kem-toi);border:1px solid var(--vien);border-radius:6px;
  padding:10px 16px;font-size:13.5px;
}

@media(max-width:640px){
  .menu{display:none;}
  .nut-menu-di-dong{display:block;}
  .menu.mo{
    display:flex;flex-direction:column;gap:0;position:absolute;top:64px;left:0;right:0;
    background:var(--xanh-dam);padding:10px 20px 20px;border-bottom:2px solid var(--vang);
  }
  .menu.mo a{padding:12px 0;border-bottom:1px solid #24382C;}
}