:root {
  --navy: #0F1B6E;
  --blue: #5A54FF;
  --teal: #1FD3CC;
  --definition: #7A80D4;
  --secondary: #6170B8;
  --muted: #9DA3CC;
  --surface: #EEEEFF;
  --white: #FFFFFF;

  --border-default: #DDE1F5;
  --border-hover: #C8CEF7;
  --search-hover-bg: #F8F9FF;
  --btn-hover-bg: #E4E7FF;
  --btn-active-bg: #DDFBF8;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 4.5rem;
  background: var(--white);
  border-bottom: 1px solid var(--border-default);
  z-index: 100;
}

#navbar-inner {
  height: 100%;
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

#logo img {
  height: auto;
  width: auto;
  display: block;
  flex-shrink: 0;
}

.nav-link {
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: color 0.15s;
}

.nav-link:hover { color: var(--secondary); }

.nav-link.active {
  color: var(--navy);
  font-weight: 700;
}

#search-input {
  margin-left: auto;
  width: 180px;
  background: var(--white);
  border: 1px solid var(--border-default);
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--navy);
  padding: 0.5rem 1.1rem;
  border-radius: 100px;
  outline: none;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s, width 0.2s ease;
}

#search-input::placeholder { color: var(--muted); }
#search-input:hover { background: var(--search-hover-bg); border-color: var(--border-hover); }
#search-input:focus {
  background: var(--white);
  border: 2px solid var(--blue);
  box-shadow: 0 0 0 4px rgba(90,84,255,0.12);
  width: 300px;
}

@media (max-width: 600px) {
  #navbar { height: 3.75rem; }
  #navbar-inner { padding: 0 1rem; gap: 0.5rem; }
#search-input { width: 120px; }
  #search-input:focus { width: 200px; }
}