/* Kaspa One Stop -- shared product-line nav bar */
/* Mobile-first: hamburger menu at <=640px, inline links at >=641px */

.kos-product-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 48px;
  padding: 0 20px;
  background: #0b1c2b;
  color: #e2e8f0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 14px;
  box-sizing: border-box;
  border-bottom: 2px solid #78d6aa;
  position: sticky; top: 0;
  z-index: 100;
  line-height: 1;
}

.kos-product-bar a {
  color: #c8d6e0;
  text-decoration: none;
  transition: color 0.15s;
}

.kos-product-bar a:hover {
  color: #ffffff;
}

/* Brand */
.kos-product-bar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 14px;
  color: #ffffff;
  letter-spacing: 0.02em;
  flex-shrink: 0;
  white-space: nowrap;
}

.kos-product-bar-brand img {
  display: block;
  flex-shrink: 0;
  width: 22px;
  height: 22px;
}

/* Links container */
.kos-product-bar-links {
  display: flex;
  gap: 28px;
  align-items: center;
  flex-shrink: 0;
}

.kos-product-bar-links a {
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s, color 0.2s;
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.kos-product-bar-links a:hover {
  color: #ffffff;
  border-bottom-color: rgba(120, 214, 170, 0.5);
}

.kos-product-bar-links a[aria-current="page"] {
  color: #ffffff;
  border-bottom-color: #78d6aa;
}

/* Hamburger -- hidden on desktop */
.kos-menu-toggle {
  display: none;
}

.kos-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  padding: 10px 4px;
  flex-shrink: 0;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.kos-menu-btn span {
  display: block;
  width: 22px;
  height: 2.5px;
  background: #c8d6e0;
  border-radius: 2px;
  transition: transform 0.25s, opacity 0.2s;
  transform-origin: center;
}

/* Mobile: <=640px */
@media (max-width: 640px) {
  .kos-product-bar {
    padding: 0 16px;
  }

  .kos-product-bar-brand {
    font-size: 13px;
    gap: 6px;
  }

  .kos-product-bar-brand img {
    width: 20px;
    height: 20px;
  }

  /* Hide inline links, show hamburger */
  .kos-product-bar-links {
    display: none;
    position: absolute;
    top: 48px;
    left: 0;
    right: 0;
    background: #0f2032;
    flex-direction: column;
    gap: 0;
    border-bottom: 2px solid #78d6aa;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
    padding: 4px 0;
    z-index: 200;
  }

  .kos-product-bar-links a {
    display: flex;
    align-items: center;
    padding: 14px 20px;
    border-bottom: none;
    border-left: 3px solid transparent;
    width: 100%;
    box-sizing: border-box;
    font-size: 15px;
    font-weight: 500;
    color: #d5e0ea;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
  }

  .kos-product-bar-links a:hover {
    background: rgba(255, 255, 255, 0.06);
    border-bottom: none;
  }

  .kos-product-bar-links a[aria-current="page"] {
    border-bottom: none;
    border-left-color: #78d6aa;
    background: rgba(120, 214, 170, 0.1);
    color: #78d6aa;
  }

  /* Show hamburger */
  .kos-menu-btn {
    display: flex;
  }

  /* Toggle dropdown via checkbox hack */
  .kos-menu-toggle:checked ~ .kos-product-bar-links {
    display: flex;
  }

  /* Hamburger to X animation */
  .kos-menu-toggle:checked ~ .kos-menu-btn span:nth-child(1) {
    transform: translateY(7.5px) rotate(45deg);
  }

  .kos-menu-toggle:checked ~ .kos-menu-btn span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
  }

  .kos-menu-toggle:checked ~ .kos-menu-btn span:nth-child(3) {
    transform: translateY(-7.5px) rotate(-45deg);
  }
}

/* Very small screens: shorten brand text */
@media (max-width: 380px) {
  .kos-product-bar {
    padding: 0 12px;
  }

  .kos-product-bar-brand {
    font-size: 12px;
    gap: 5px;
  }

  .kos-product-bar-links a {
    padding: 14px 16px;
    font-size: 14px;
  }
}