/* Reset & Biến màu sắc */
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Arial, sans-serif;
  color: #172033;
  background-color: #f8fafc;
  line-height: 1.55;
}
a { color: #0f766e; text-decoration: none; }

/* 1. Header */
header.site-header {
  background: #0f766e;
  color: #ffffff;
  padding: 18px 24px;
}
.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.brand h1 { margin: 0; font-size: 24px; letter-spacing: -0.5px; }
.brand p { margin: 4px 0 0; font-size: 13px; color: #ccfbf1; }
.current-date { font-size: 13px; color: #f0fdfa; margin-right: 12px; }
.weather-badge {
  display: inline-block;
  background: #115e59;
  color: #fef08a;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}

/* 2. Thanh điều hướng Nav bằng Flexbox */
nav.site-nav {
  background: #115e59;
  padding: 0 20px;
}
nav.site-nav ul.nav-list {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 10px 0;
}
nav.site-nav li a {
  color: #ffffff;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 4px;
}
nav.site-nav li a:hover {
  background: #0f766e;
}

/* 3. Bố cục nội dung chính chia 3 cột bằng Flexbox */
main.newspaper-main {
  padding: 24px;
  max-width: 1280px;
  margin: 0 auto;
}
.newspaper-layout {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  flex-wrap: wrap;
}
.col-lead-column {
  flex: 3.5 1 560px;
}
.col-wire-column {
  flex: 1.5 1 230px;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 16px;
}
.col-opinion-column {
  flex: 1.2 1 210px;
  background: #f0fdfa;
  border: 1px solid #99f6e4;
  border-radius: 8px;
  padding: 16px;
  align-self: flex-start;
}

/* Bài viết tiêu điểm */
.lead-story-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-left: 5px solid #0f766e;
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
}
.lead-tag {
  display: inline-block;
  background: #0f766e;
  color: #ffffff;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 4px;
  margin-bottom: 8px;
}
.lead-story-card h2 { margin: 0 0 10px; font-size: 22px; line-height: 1.35; color: #0f172a; }
.lead-intro { margin: 0 0 12px; font-size: 14.5px; color: #334155; }
.lead-quote {
  margin: 12px 0;
  padding: 10px 16px;
  background: #f1f5f9;
  border-left: 3px solid #64748b;
  font-style: italic;
  font-size: 13.5px;
  color: #1e293b;
}
.lead-author { font-size: 12px; color: #64748b; }

/* 6 Thẻ con sắp xếp bằng Flexbox - Kích thước KHÔNG bằng nhau */
.articles-flex-group {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  align-items: stretch;
  gap: 14px;
}
.news-item {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 14px 16px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
.news-item.n1 { flex: 2 1 240px; }
.news-item.n2 { flex: 1.3 1 190px; }
.news-item.n3 { flex: 1 1 160px; align-self: flex-end; }
.news-item.n4 { flex: 2.2 1 270px; }
.news-item.n5 { flex: 1.1 1 170px; }
.news-item.n6.urgent-flash {
  flex: 2.8 1 320px;
  order: -1; /* Đổi thứ tự hiển thị lên đầu */
  background: #fef2f2;
  border-color: #fca5a5;
}
.flash-badge {
  display: inline-block;
  background: #dc2626;
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 4px;
  margin-bottom: 6px;
}
.news-item h3 { margin: 0 0 6px; font-size: 15px; color: #0f766e; }
.news-item p { margin: 0 0 8px; font-size: 13px; color: #475569; }
.news-item time { font-size: 11.5px; color: #94a3b8; }

/* Phần tử ẩn bằng display: none */
.internal-draft-note { display: none; }

/* Sidebar contents */
.wire-item { margin-bottom: 12px; padding-bottom: 10px; border-bottom: 1px dashed #cbd5e1; }
.wire-item:last-child { border-bottom: none; }
.wire-item h4 { margin: 0 0 4px; font-size: 14px; color: #1e293b; }
.wire-item p { margin: 0; font-size: 12.5px; color: #475569; }

.opinion-card { margin-bottom: 16px; }
.opinion-card h4 { margin: 0 0 6px; font-size: 14px; color: #0f766e; }
.opinion-card p { margin: 0 0 6px; font-size: 13px; color: #334155; }
.opinion-card cite { font-size: 11.5px; color: #64748b; font-style: normal; font-weight: 600; }
.readers-poll { background: #ffffff; padding: 12px; border-radius: 6px; border: 1px solid #ccfbf1; }
.readers-poll h4 { margin: 0 0 4px; font-size: 13.5px; color: #0f172a; }
.readers-poll p { margin: 0 0 6px; font-size: 12.5px; color: #475569; }
.poll-stat { font-size: 12px; font-weight: 700; color: #0f766e; }

/* 4. Footer nhiều cột bằng Flexbox */
footer.site-footer {
  background: #115e59;
  color: #f0fdfa;
  padding: 28px 24px;
  margin-top: 30px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 24px;
  max-width: 1280px;
  margin: 0 auto;
}
.footer-col { flex: 1 1 220px; }
.footer-col h4 { margin: 0 0 10px; font-size: 15px; color: #ffffff; }
.footer-col p { margin: 0 0 6px; font-size: 13px; color: #ccfbf1; }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col ul li { margin-bottom: 6px; font-size: 13px; color: #ccfbf1; }
.footer-col address { font-style: normal; }