body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.7;
    color: #222;
    background: #fafafa;
}

.container {
    max-width: 1200px;
    margin: auto;
    padding: 0px;
}

header {
    background: #111;
    color: #fff;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.4rem;
}

button {
    padding: 8px 14px;
    border: none;
    cursor: pointer;
    background: #c62828;
    color: #fff;
    border-radius: 4px;
}

.hero {
    padding: 40px 0;
}

h2 {
    margin-top: 30px;
    color: #c62828;
}

.info-list {
    list-style: none;
    padding-left: 0;
}

.info-list li {
    margin-bottom: 10px;
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 15px;
}

.gallery img {
    width: 100%;
    border-radius: 6px;
}

footer {
    background: #111;
    color: #ccc;
    text-align: center;
    padding: 20px;
    margin-top: 40px;
}

@media (max-width: 768px) {
    h2 {
        font-size: 1.3rem;
    }
}

.section-light {
  background: #ffffff;
  color: #111;
}

.section-dark {
  background: #0f172a;
  color: #e5e7eb;
}

.section-title.light,
.section-lead.light {
  color: #f9fafb;
}

.text-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-top: 48px;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.gallery-grid img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: 12px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gallery-grid img:hover {
  transform: scale(1.03);
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

/* Responsive */
@media (max-width: 992px) {
  .text-columns {
    grid-template-columns: 1fr;
  }
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 576px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }
  .gallery-grid img {
    height: 220px;
  }
}


.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 48px;
}

.article-card {
  background: #ffffff;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.article-card a {
  color: inherit;
  text-decoration: none;
  display: block;
  height: 100%;
}

.article-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.article-content {
  padding: 20px 22px;
}

.article-content h3 {
  font-size: 1.1rem;
  line-height: 1.4;
  margin-bottom: 12px;
}

.article-content p {
  font-size: 0.95rem;
  color: #475569;
  line-height: 1.6;
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 45px rgba(0,0,0,0.12);
}

/* Responsive */
@media (max-width: 992px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 576px) {
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .article-card img {
    height: 180px;
  }
}

.share-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  margin-top: 48px;
}

.share-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 26px 18px;
  border-radius: 16px;
  border: none;
  background: #f8fafc;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.share-btn img {
  width: 56px;
  height: 56px;
  margin-bottom: 14px;
}

.share-btn span {
  font-size: 1rem;
  font-weight: 500;
}

.share-btn:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 40px rgba(0,0,0,0.12);
}

/* Màu nhận diện */
.share-btn.facebook { background: #e7f0ff; }
.share-btn.zalo { background: #e6f4ff; }
.share-btn.email { background: #f1f5f9; }
.share-btn.link { background: #fef3c7; }

.copy-message {
  margin-top: 24px;
  text-align: center;
  font-size: 0.95rem;
  color: #15803d;
  display: none;
}

/* Responsive */
@media (max-width: 992px) {
  .share-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 576px) {
  .share-grid {
    grid-template-columns: 1fr;
  }
}

.investment-summary {
  margin-top: 56px;
  padding: 32px 36px;
  background: #f8fafc;
  border-left: 6px solid #0f172a;
  border-radius: 12px;
}

.investment-summary h3 {
  margin-bottom: 18px;
}

.investment-summary ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.investment-summary li {
  padding: 10px 0 10px 28px;
  position: relative;
  font-size: 1rem;
}

.investment-summary li::before {
  content: "●";
  position: absolute;
  left: 0;
  top: 10px;
  color: #0f172a;
  font-size: 0.8rem;
}

.tag.xlarge {
  font-size: 1.25rem;
  font-weight: 700;
  background: #facc15;
}

.tag.large {
  font-size: 1.1rem;
  font-weight: 600;
  background: #fde68a;
}

.tag.medium {
  font-size: 1rem;
  font-weight: 500;
}

.tag.urban {
  background: #e0f2fe;
  color: #075985;
}

.tag {
  text-decoration: none;
}

.tag:hover {
  text-decoration: none;
}