.app-header {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo img {
    height: 32px;
    width: auto;
}

.main-nav {
    display: flex;
    gap: 2rem;
}

.main-nav a {
    color: var(--text-color);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: background-color 0.2s;
}

.main-nav a:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.main-nav a.active {
    background-color: var(--primary-color);
    color: white;
}

.search-box {
    display: flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.05);
    border-radius: var(--border-radius);
    padding: 0.5rem;
    transition: background-color 0.2s;
}

.search-box:focus-within {
    background: rgba(0, 0, 0, 0.08);
}

.search-box input {
    border: none;
    background: none;
    padding: 0.5rem;
    outline: none;
    font-size: 0.9rem;
    width: 200px;
    color: var(--text-color);
}

.search-box input::placeholder {
    color: rgba(0, 0, 0, 0.4);
}

.search-box button {
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.search-box button:hover {
    opacity: 1;
}

.search-icon {
    display: inline-block;
    width: 16px;
    height: 16px;
    background: url('/assets/search.svg') no-repeat center;
    background-size: contain;
}