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

/* BIẾN MÀU */
:root {
  --bg: #dfe5eb;
  --white: #ffffff;
  --text: #1f2937;
  --heading: #163861;
  --text-soft: #355377;
  --line: #c8d1dc;
  --link: #0b63ce;
  --link-hover: #084ea3;
  --drive: #16a34a;
  --drive-hover: #15803d;
  --media: #f97316;
  --media-hover: #ea580c;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

/* HEADER */
.header {
  background: #ffffff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 72px;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  height: 42px;
}

/* MENU */
.menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.menu > li {
  position: relative;
}

.menu > li > a {
  display: block;
  padding: 14px 18px;
  border-radius: 10px;
  font-weight: 600;
  color: #1e3a5f;
  transition: 0.25s ease;
}

.menu > li > a:hover,
.menu > li > a.active {
  background: #edf3ff;
  color: #0b5ed7;
}

/* DROPDOWN */
.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  width: 260px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.08);
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: 0.25s ease;
}

.has-dropdown:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown li a {
  display: block;
  padding: 14px 18px;
  font-weight: 600;
  color: #1e3a5f;
  border-bottom: 1px solid #f1f5f9;
}

.dropdown li a:hover {
  background: #f8fbff;
  color: #0b5ed7;
}

/* CONTENT */
.page-wrap {
  padding: 38px 0 0;
}

.content-card {
  background: var(--white);
  border: 1px solid #d7dee8;
  padding: 42px 48px 54px;
}

h1, h2, h3 {
  color: var(--heading);
  margin-bottom: 20px;
}

h1 { font-size: 33px; }
h2 { font-size: 30px; margin-top: 34px; }
h3 { font-size: 23px; margin-top: 28px; }

p {
  font-size: 18px;
  color: var(--text-soft);
  margin-bottom: 18px;
}

/* TABLE */
table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  border: 1px solid var(--line);
  padding: 14px;
}

th {
  background: #1f2937;
  color: #fff;
}

/* BUTTON */
.btn-drive {
  background: var(--drive);
  color: #fff;
  padding: 8px 14px;
  border-radius: 6px;
}

.btn-media {
  background: var(--media);
  color: #fff;
  padding: 8px 14px;
  border-radius: 6px;
}

/* MOBILE */
.menu-toggle {
  display: none;
  font-size: 28px;
  background: none;
  border: none;
}

@media (max-width: 991px) {
  .menu-toggle {
    display: block;
  }

  .menu {
    display: none;
    flex-direction: column;
    width: 100%;
    background: #fff;
  }

  .menu.active {
    display: flex;
  }

  .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    display: none;
  }

  .has-dropdown.open .dropdown {
    display: block;
  }
}