/* Professional header architecture: layout, accessibility, responsiveness */

#header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1100;
    background: rgba(13, 18, 32, 0.94);
    border-bottom: 1px solid rgba(39, 168, 127, 0.18);
    backdrop-filter: blur(10px);
    transition: transform 0.28s ease, background-color 0.28s ease, box-shadow 0.28s ease;
}

#header.scrolled,
#header.header-scrolled {
    background: rgba(13, 18, 32, 0.98);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

#header.hide-header {
    transform: translateY(-100%);
}

#header .header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: 72px;
}

#header .logo {
    margin: 0;
    line-height: 0;
}

#header .logo a {
    display: inline-flex;
    align-items: center;
}

#header .logo img {
    width: auto;
    max-height: 48px;
    display: block;
}

#header .main-nav {
    display: flex;
    align-items: center;
}

#header .main-nav .nav-links {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

#header .main-nav .nav-links > li {
    margin: 0;
}

#header .main-nav .nav-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 12px;
    color: rgba(255, 255, 255, 0.86);
    text-decoration: none;
    border-radius: 9px;
    font-size: 0.9rem;
    line-height: 1.2;
    transition: color 0.2s ease, background-color 0.2s ease;
}

#header .main-nav .nav-links a:hover,
#header .main-nav .nav-links a.active {
    color: #ffffff;
    background: rgba(39, 168, 127, 0.18);
}

#header .main-nav .get-started-btn {
    min-height: 42px;
    border-radius: 10px;
    padding: 10px 14px !important;
}

#header .menu-toggle {
    display: none;
    border: 0;
    background: transparent;
    color: #ffffff;
    padding: 8px;
    border-radius: 8px;
    cursor: pointer;
}

#header .menu-toggle:focus-visible {
    outline: 2px solid rgba(39, 168, 127, 0.8);
    outline-offset: 2px;
}

#header .menu-icon {
    width: 26px;
    height: 18px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

#header .menu-icon span {
    display: block;
    width: 100%;
    height: 2px;
    border-radius: 2px;
    background: #ffffff;
    transition: transform 0.22s ease, opacity 0.22s ease;
}

#header .menu-toggle.active .menu-icon span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

#header .menu-toggle.active .menu-icon span:nth-child(2) {
    opacity: 0;
}

#header .menu-toggle.active .menu-icon span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

.mobile-nav-overlay {
    position: fixed;
    inset: 0;
    z-index: 1085;
    background: rgba(0, 0, 0, 0.48);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.22s ease;
}

.mobile-nav-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

#header .mobile-nav {
    position: fixed;
    top: 0;
    right: -320px;
    width: min(320px, 85vw);
    height: 100vh;
    z-index: 1090;
    background: rgba(13, 18, 32, 0.99);
    box-shadow: -8px 0 30px rgba(0, 0, 0, 0.35);
    transition: right 0.24s ease;
    overflow-y: auto;
}

#header .mobile-nav.active {
    right: 0;
}

#header .mobile-nav-inner {
    padding: 82px 20px 24px;
}

#header .mobile-nav-links {
    margin: 0 0 18px;
    padding: 0;
    list-style: none;
}

#header .mobile-nav-links li + li {
    margin-top: 8px;
}

#header .mobile-nav-links a {
    display: flex;
    align-items: center;
    min-height: 42px;
    padding: 8px 10px;
    border-radius: 8px;
    color: rgba(255, 255, 255, 0.92);
    text-decoration: none;
    transition: background-color 0.2s ease, color 0.2s ease;
}

#header .mobile-nav-links a:hover,
#header .mobile-nav-links a.active {
    background: rgba(39, 168, 127, 0.2);
    color: #ffffff;
}

#header .mobile-cta-btn {
    min-height: 44px;
}

body.menu-open {
    overflow: hidden;
}

@media (max-width: 991px) {
    #header .header-content {
        min-height: 66px;
    }

    #header .main-nav .nav-links {
        display: none;
    }

    #header .menu-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
}

@media (max-width: 767px) {
    #header .logo img {
        max-height: 42px;
    }
}