/* ============================================================
   PTFV Đà Nẵng — Header, footer, khung trang dùng chung
   ============================================================ */

/* ---------- Thanh thông tin trên cùng ---------- */
.topbar {
  background: var(--navy-950); color: #B9C9DA; font-size: 13px;
}
.topbar .container { display: flex; justify-content: space-between; align-items: center; min-height: 36px; gap: 16px; }
.topbar a { color: #D7E3EF; }
.topbar a:hover { color: var(--orange-500); }
.topbar-slogan { font-family: var(--font-display); font-weight: 600; letter-spacing: .06em; text-transform: uppercase; font-size: 11.5px; color: #8FA6BD; }
.topbar-contacts { display: flex; gap: 18px; align-items: center; }
.topbar-login { font-weight: 600; color: #FFD9B8 !important; }
.topbar-login:hover { color: var(--orange-500) !important; }
@media (max-width: 760px) {
  .topbar-slogan { display: none; }
  .topbar .container { justify-content: center; }
  .topbar-contacts span { display: none; }        /* mobile: chỉ giữ hotline + đăng nhập cho gọn */
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .94); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}
.site-header .container { display: flex; align-items: center; gap: 28px; min-height: 74px; }
.brand { display: flex; align-items: center; gap: 12px; margin-right: auto; }
.brand img { height: 44px; width: auto; }
.brand-text { line-height: 1.2; }
.brand-text .brand-name { font-family: var(--font-display); font-weight: 800; font-size: 14.5px; color: var(--navy-900); letter-spacing: -.01em; }
.brand-text .brand-branch { font-size: 12px; font-weight: 600; color: var(--orange-600); letter-spacing: .08em; text-transform: uppercase; }

.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  padding: 10px 14px; border-radius: 8px; white-space: nowrap;
  font-family: var(--font-display); font-weight: 600; font-size: 14.5px; color: var(--navy-800);
  position: relative;
}
/* Link "Tra cứu chứng thư" trong nav chỉ dành cho menu mobile */
.main-nav .mobile-only-cta { display: none; }
.main-nav a:hover { background: var(--blue-050); color: var(--blue-600); }
.main-nav a.active { color: var(--blue-600); }
.main-nav a.active::after {
  content: ''; position: absolute; left: 14px; right: 14px; bottom: 4px; height: 3px;
  background: var(--orange-500); border-radius: 2px;
  transform: skewX(-18deg); /* nét chéo thương hiệu */
}
.header-cta { flex: none; }

/* Nút mở menu mobile */
.nav-toggle {
  display: none; flex-direction: column; gap: 5px; background: none; border: 0; padding: 10px;
}
.nav-toggle span { width: 24px; height: 2.5px; background: var(--navy-900); border-radius: 2px; transition: transform .25s var(--ease), opacity .2s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

@media (max-width: 1020px) {
  .nav-toggle { display: flex; }
  .header-cta { display: none; }
  .main-nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: #fff; border-bottom: 1px solid var(--line); padding: 10px 16px 16px;
    box-shadow: var(--shadow-md);
  }
  .main-nav.open { display: flex; }
  .main-nav .mobile-only-cta { display: block; color: var(--orange-600); }
  .main-nav a { padding: 13px 14px; }
  .main-nav a.active::after { display: none; }
  .main-nav a.active { background: var(--blue-050); }
}

/* ---------- Hero phụ (trang trong) ---------- */
.page-hero {
  background:
    linear-gradient(180deg, rgba(255,255,255,.08), transparent 40%),
    radial-gradient(900px 360px at 85% -60%, rgba(60, 150, 230, .45), transparent 60%),
    linear-gradient(120deg, var(--navy-900) 0%, var(--navy-800) 70%, var(--navy-700) 100%);
  color: #fff; position: relative; overflow: hidden;
}
.page-hero::after { /* nét chéo cam góc phải */
  content: ''; position: absolute; right: -40px; top: -30%; width: 220px; height: 160%;
  background: linear-gradient(90deg, rgba(245,121,32,.9), rgba(245,121,32,.55));
  transform: skewX(-18deg); opacity: .16;
}
.page-hero .container { padding: 58px 24px 54px; position: relative; z-index: 1; }
.page-hero h1 { color: #fff; font-size: clamp(28px, 4.2vw, 44px); font-weight: 800; margin: 10px 0 6px; }
.page-hero .kicker { color: #FFB273; }
.page-hero .kicker::before { filter: brightness(1.4); }
.breadcrumb { font-size: 13.5px; color: #9FB4C9; }
.breadcrumb a { color: #C9D9E8; }
.breadcrumb a:hover { color: var(--orange-500); }

/* ---------- Khối nội dung bài viết / trang tĩnh ---------- */
.prose-wrap { padding: 56px 0 72px; }
.prose {
  background: #fff; border: 1px solid var(--line-soft); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm); padding: clamp(24px, 4vw, 48px); max-width: 860px;
}
.prose h2 { font-size: 24px; margin-top: 1.6em; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 19px; margin-top: 1.4em; }
.prose ul { padding-left: 22px; }
.prose li { margin-bottom: .45em; }
.prose blockquote {
  margin: 1.2em 0; padding: 14px 20px; border-left: 4px solid var(--orange-500);
  background: var(--blue-050); border-radius: 0 var(--radius) var(--radius) 0; color: var(--navy-800);
}

/* Layout 2 cột có sidebar */
.with-sidebar { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 32px; align-items: start; }
@media (max-width: 900px) { .with-sidebar { grid-template-columns: 1fr; } }
.sidebar-card {
  background: #fff; border: 1px solid var(--line-soft); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm); padding: 24px; margin-bottom: 20px;
}
.sidebar-card h3 { font-size: 16px; padding-bottom: 10px; border-bottom: 2px solid var(--orange-500); display: inline-block; }
.sidebar-links { list-style: none; margin: 0; padding: 0; }
.sidebar-links li { border-bottom: 1px dashed var(--line-soft); }
.sidebar-links li:last-child { border-bottom: 0; }
.sidebar-links a { display: block; padding: 10px 2px; font-weight: 500; font-size: 14.5px; color: var(--ink); }
.sidebar-links a:hover { color: var(--orange-600); padding-left: 6px; transition: all .18s var(--ease); }
.sidebar-links a.active { color: var(--blue-600); font-weight: 700; }

/* Card CTA tra cứu trong sidebar */
.sidebar-cta {
  background: linear-gradient(135deg, var(--navy-800), var(--navy-700)); color: #E4EDF6;
  border-radius: var(--radius-lg); padding: 26px; position: relative; overflow: hidden;
}
.sidebar-cta::after { content: ''; position: absolute; right: -26px; top: -20%; width: 90px; height: 140%; background: var(--orange-500); opacity: .14; transform: skewX(-18deg); }
.sidebar-cta h3 { color: #fff; font-size: 18px; }
.sidebar-cta p { font-size: 14px; color: #B9C9DA; }

/* ---------- Footer ---------- */
.site-footer { background: var(--navy-950); color: #A9BCCE; margin-top: 0; }
.footer-main { padding: 56px 0 40px; display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 36px; }
@media (max-width: 960px) { .footer-main { grid-template-columns: 1fr 1fr; } }
@media (max-width: 620px) { .footer-main { grid-template-columns: 1fr; } }
.footer-brand img { height: 40px; background: #fff; padding: 6px 10px; border-radius: 8px; }
.footer-brand p { font-size: 13.5px; line-height: 1.7; margin-top: 14px; }
.footer-col h4 {
  color: #fff; font-size: 13.5px; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 16px;
}
.footer-col h4::after { content: ''; display: block; width: 28px; height: 3px; background: var(--orange-500); margin-top: 8px; transform: skewX(-18deg); }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: 9px; font-size: 14px; }
.footer-col a { color: #A9BCCE; }
.footer-col a:hover { color: var(--orange-500); }
.footer-contact li { display: flex; gap: 10px; align-items: baseline; }
.footer-contact .ico { color: var(--orange-500); flex: none; width: 16px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 18px 0; font-size: 13px; }
.footer-bottom .container { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.footer-bottom a { color: #C9D9E8; }

/* ---------- Form chung ---------- */
.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 600; font-size: 13.5px; margin-bottom: 6px; color: var(--navy-800); }
.field .req { color: var(--err); }
.field input, .field select, .field textarea {
  width: 100%; padding: 11px 14px; border: 1.5px solid var(--line); border-radius: var(--radius);
  background: #fff; color: var(--ink); transition: border-color .15s, box-shadow .15s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--blue-500); box-shadow: 0 0 0 3px rgba(34, 115, 199, .15);
}
.field textarea { resize: vertical; min-height: 96px; }
.field .hint { font-size: 12.5px; color: var(--muted); margin-top: 4px; }

/* Thông báo */
.alert { padding: 12px 16px; border-radius: var(--radius); font-size: 14px; margin-bottom: 16px; border: 1px solid transparent; }
.alert-ok { background: var(--ok-bg); color: var(--ok); border-color: #BBE3CC; }
.alert-err { background: var(--err-bg); color: var(--err); border-color: #F2C3BC; }
.alert-info { background: var(--blue-050); color: var(--navy-700); border-color: var(--blue-100); }

/* Spinner nhỏ */
.spinner {
  width: 18px; height: 18px; border: 2.5px solid rgba(255,255,255,.35); border-top-color: #fff;
  border-radius: 50%; animation: spin .7s linear infinite; display: inline-block; vertical-align: -4px;
}
.spinner-dark { border-color: rgba(26,95,168,.25); border-top-color: var(--blue-600); }
@keyframes spin { to { transform: rotate(360deg); } }