/* ===== CORE THEME STYLES ===== */

:root {
  --color-primary: #0f63ac;
  --color-secondary: #09365d;
  --color-white: #ffffff;
  --color-black: #222;
  --font-main: "Inter", sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: var(--font-main);
}

html,
body {
  height: 100%;
  background: #fff;
  color: var(--color-black);
}

/* ===== HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-primary);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.08);
}

.header-top {
  background: #fff;
  padding: 12px 0;
}

.header-top-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 0 20px;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo-img {
  height: 80px;
}
.bo_nhan_dien-img {
  height: 60px;
}

.site-title {
  color: #0f5eac;
  font-size: 64px;
  font-weight: 700;
  letter-spacing: 6px;
  text-transform: uppercase;
}

/* ===== NAV ===== */
.header-bottom {
  background: var(--color-primary);
  padding: 10px 0;
}

.header-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 20px;
}

.main-navigation ul {
  list-style: none;
  display: flex;
  gap: 22px;
}

.main-navigation a {
  color: #fff;
  font-size: 18px;
  text-decoration: none;
}

.login-button {
  border: 1px solid #fff;
  color: #fff;
  padding: 6px 14px;
  border-radius: 5px;
  background: transparent;
}

/* ===== FOOTER ===== */
footer {
  background: var(--color-secondary);
  color: #fff;
  padding: 50px 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}

.footer-title {
  font-size: 22px;
  font-weight: 700;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .site-title {
    font-size: 40px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
}