/* nav.css */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 10, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s, border-color 0.3s;
  height: 60px;
}
[data-theme="light"] .navbar {
  background: rgba(255, 255, 255, 0.88);
}

.navbar .container {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* brand */
.nav-brand {
  display: flex;
  align-items: center;
  gap: 9px;
  flex-shrink: 0;
  text-decoration: none;
  margin-right: 8px;
}
.nav-brand img {
  width: 28px;
  height: 28px;
}
.nav-brand-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}
.nav-brand-ver {
  font-size: 10px;
  font-family: var(--mono);
  color: var(--text3);
  background: var(--bg3);
  border: 1px solid var(--border);
  padding: 1px 7px;
  border-radius: 99px;
  margin-left: 2px;
}

/* links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  flex: 1;
}
.nav-links a,
.nav-links button.nav-link-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 13.5px;
  font-family: var(--sans);
  color: var(--text3);
  padding: 6px 11px;
  border-radius: 7px;
  transition: all 0.18s;
  text-decoration: none;
  border: none;
  background: none;
  cursor: pointer;
  white-space: nowrap;
}
.nav-links a:hover,
.nav-links button.nav-link-btn:hover { color: var(--text); background: var(--bg3); }

.nav-divider { width: 1px; height: 16px; background: var(--border); margin: 0 4px; }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  flex-shrink: 0;
}

/* theme toggle */
.theme-btn {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg3);
  color: var(--text3);
  cursor: pointer;
  transition: all 0.2s;
  flex-shrink: 0;
}
.theme-btn:hover { color: var(--text); border-color: var(--border2); }

/* uc badge */
.uc-badge {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-family: var(--mono);
  color: #f59e0b;
  background: rgba(245,158,11,0.1);
  border: 1px solid rgba(245,158,11,0.3);
  padding: 3px 10px;
  border-radius: 99px;
}

/* mobile hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4.5px;
  width: 34px;
  height: 34px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg3);
  cursor: pointer;
  transition: all 0.2s;
  flex-shrink: 0;
}
.hamburger span {
  display: block;
  width: 15px;
  height: 1.5px;
  background: var(--text2);
  border-radius: 2px;
  transition: all 0.28s cubic-bezier(0.23,1,0.32,1);
  transform-origin: center;
}
.hamburger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* mobile drawer */
@media (max-width: 820px) {
  .hamburger { display: flex; }
  .nav-divider { display: none; }

  .nav-links {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
    transition: max-height 0.35s ease, opacity 0.25s ease, padding 0.25s;
  }
  .nav-links.open {
    max-height: 500px;
    opacity: 1;
    pointer-events: auto;
    padding: 8px 12px 14px;
  }
  .nav-links li { width: 100%; }
  .nav-links a,
  .nav-links button.nav-link-btn {
    width: 100%;
    justify-content: flex-start;
    padding: 11px 14px;
    border-radius: 8px;
    font-size: 14px;
  }
}
@media (max-width: 480px) {
  .nav-brand-ver { display: none; }
  .nav-actions .btn { padding: 6px 12px; font-size: 12px; }
}