/* ===== HEADER WRAPPER ===== */
.site-header {
  width: 100%;
  padding: 1rem 1.5rem;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  border-bottom-left-radius: 1rem;
  border-bottom-right-radius: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  max-width: 100%;
  overflow-x: hidden;
  gap: 1rem;
  min-height: 80px;
}

/* ===== LEFT SIDE ===== */
.header-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.header-logo {
  width: 2rem;
  height: 2rem;
  filter: drop-shadow(0 0 15px #1E90FF);
}

.header-title {
  font-size: 1.75rem;
  font-weight: bold;
  color: #1E90FF;
  filter: drop-shadow(0 0 15px #1E90FF);
  white-space: nowrap;
}

/* ===== NAVIGATION ===== */
.header-nav {
  display: flex;
  gap: 1.5rem;
  font-weight: 600;
  color: white;
  align-items: center;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.9));
  flex-wrap: wrap;
  justify-content: flex-end;
}

.header-nav a {
  color: white;
  text-decoration: none;
  transition: color 0.25s ease;
  white-space: nowrap;
}

.header-nav a:hover {
  color: #93C5FD;
}

/* ===== USER + LOGOUT ===== */
.header-user {
  color: #e0eaff;
  font-weight: 600;
  margin-left: 0.5rem;
  text-shadow: 0 0 10px rgba(30, 144, 255, 0.7);
}

.logout-btn {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.4);
  padding: 0.3rem 0.75rem;
  color: white;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  backdrop-filter: blur(4px);
  transition: all 0.25s ease;
}

.logout-btn:hover {
  background: rgba(255, 255, 255, 0.25);
  color: #93C5FD;
}

/* Placeholder */
.header-placeholder {
  visibility: hidden;
  width: 200px;
}

/* ===== HAMBURGER ===== */
.header-burger {
  display: none;
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 10px;
  padding: 0.35rem 0.55rem;
  cursor: pointer;
  backdrop-filter: blur(4px);
}

.burger-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: rgba(255, 255, 255, 0.9);
  margin: 4px 0;
  border-radius: 2px;
}

.header-auth {
  display: contents;
}

/* ================= MOBILE ONLY ================= */
@media (max-width: 600px) {
  .site-header {
    flex-wrap: wrap;
    padding: 0.75rem 1rem;
    gap: 10px;
  }

  .header-burger {
    display: inline-block;
    margin-left: auto;
  }

  .header-title {
    font-size: 1.35rem;
  }

  .header-nav a {
    font-size: 0.95rem;
  }

  .header-user {
    font-size: 0.9rem;
  }

  .logout-btn {
    font-size: 0.85rem;
    padding: 0.25rem 0.6rem;
  }

  .header-placeholder {
    display: none;
  }

  .header-nav {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    margin-top: 8px;
    padding: 0 12px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.18);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    pointer-events: none;
    transition:
      max-height 260ms ease,
      opacity 200ms ease,
      padding 260ms ease;
  }

  .header-nav.is-open {
    max-height: 520px;
    opacity: 1;
    padding: 10px 12px;
    pointer-events: auto;
  }

  .header-auth {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding-top: 10px;
    border-top: 1px solid rgba(255,255,255,0.25);
  }

  .header-user,
  .logout-btn {
    margin: 0;
    line-height: 1;
    display: flex;
    align-items: center;
    white-space: nowrap;
  }
}