.header {
    width: 100%;
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: #111827;
    border-bottom: 1px solid #2d3748;
}

.navbar {
    max-width: 1200px;
    height: 90px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo img {
    display: block;
    height: 70px;
    width: auto;
    object-fit: contain;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 35px;
}

.nav-links a {
    text-decoration: none;
    color: #d1d5db;
    transition: 0.3s;
}

.nav-links a:hover {
    color: #3b82f6;
}

/*منوی همبرگری*/
.action {
    display: flex;
    align-items: center;
    gap: 10px;
}

.mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 320px;
    max-width: 85vw;
    height: 100vh;
    padding: 25px;
    background: #111827;
    border-left: 1px solid #2d3748;
    z-index: 1001;
    transform: translateX(100%);
    transition: transform 0.35s ease;
}

.mobile-menu.open {
    transform: translateX(0);
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 20px;
    border-bottom: 1px solid #2d3748;
}

.mobile-menu-header span {
    font-size: 22px;
    font-weight: 700;
}

.menu-close {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    color: #d1d5db;
    font-size: 30px;
    cursor: pointer;
    border-radius: 10px;
    transition: 0.3s;
}

.menu-close:hover {
    background: #1f2937;
    color: #3b82f6;
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    margin-top: 25px;
}

.mobile-nav a {
    padding: 16px 10px;
    color: #d1d5db;
    text-decoration: none;
    font-size: 17px;
    border-bottom: 1px solid #1f2937;
    transition: 0.3s;
}

.mobile-nav a:hover {
    color: #3b82f6;
    padding-right: 18px;
}

.menu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s ease,
    visibility 0.35s ease;
}

.menu-overlay.open {
    opacity: 1;
    visibility: visible;
}

.menu-toggle {
    display: none;
    border: none;
    background: transparent;
    color: #d1d5db;
    font-size: 28px;
    cursor: pointer;
    padding: 5px;
    border-radius: 8px;
    transition: 0.3s;
}

.menu-toggle:hover {
    color: #3b82f6;
}

/*قفل شدن اسکرول صفحه هنگام باز شدن منو*/
body.menu-open {
    overflow: hidden;
}