/* ===== Header ===== */
header {
  background: #fff;
  border-bottom: 3px solid #1a4fa0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.header-inner {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

/* ===== Logo ===== */
.site-logo {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-badge {
  width: 45px;
  height: 45px;
  flex-shrink: 0;
  position: relative;
}

.logo-badge img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  mix-blend-mode: multiply;
  z-index: 1;
}

.badge-fallback {
  display: none;
  color: #fff;
  font-size: 1.6rem;
  line-height: 1;
  pointer-events: none;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
  gap: 2px;
}

.logo-text .logo-line1 {
  font-size: 0.75rem;
  font-weight: 400;
  color: #888888;
  letter-spacing: 0.05em;
}

.logo-text .logo-line2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: #1a4fa0;
  letter-spacing: 0.03em;
  line-height: 1.25;
}

.logo-text .logo-line3 {
  font-size: 0.65rem;
  font-weight: 400;
  color: #aaaaaa;
  letter-spacing: 0.15em;
}

/* ===== Nav ===== */
nav ul {
  display: flex;
  gap: 4px;
  list-style: none;
}

nav ul li a {
  display: block;
  padding: 6px 11px;
  font-size: 0.9rem;
  color: #333;
  border-radius: 4px;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

nav ul li a:hover,
nav ul li a.active {
  background: #e8820c;
  color: #fff;
}

/* ===== Hamburger ===== */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #1a4fa0;
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.25s;
}

/* ===== Mobile Nav ===== */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  nav {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 3px solid #1a4fa0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    z-index: 99;
  }

  nav.open {
    display: block;
  }

  nav ul {
    flex-direction: column;
    gap: 0;
    padding: 8px 0;
  }

  nav ul li a {
    padding: 12px 24px;
    font-size: 0.95rem;
    border-radius: 0;
  }

  nav ul li a:hover,
  nav ul li a.active {
    background: #fff8f0;
    color: #e8820c;
  }

  .logo-text .logo-line2 {
    font-size: 1.2rem;
  }
}

@media (max-width: 400px) {
  .logo-badge {
    width: 36px;
    height: 36px;
  }

  .badge-fallback {
    font-size: 1.3rem;
  }

  .logo-text .logo-line2 {
    font-size: 1.1rem;
  }
}