/* Navigation */
.main-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--bg-color);
    box-shadow: var(--shadow);
}

.navbar {
    padding: 1rem 0;
}

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

/* Logo Image Styling */
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    position: relative;
    min-height: 40px; /* Give some height for loading */
}

.logo-text {
    display: inline-block;
}

.logo-image {
    max-height: 35px;
    max-width: 150px;
    height: auto;
}

/* When image loads, show it and hide text */
.logo.loaded .logo-image {
    display: block;
}

.logo.loaded .logo-text,
.logo.loaded .fa-sync-alt {
    display: none;
}

/* When image fails to load, show text */
.logo.error .logo-image {
    display: none;
}

.logo.error .logo-text,
.logo.error .fa-sync-alt {
    display: inline-block;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-color);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

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

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    list-style: none;
    padding: 0.5rem 0;
    z-index: 100;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0.75rem 1.5rem;
    color: var(--text-color);
    white-space: nowrap;
}

.dropdown-item:hover {
    background-color: var(--bg-color);
}

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-color);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition);
}

.theme-toggle:hover {
    background-color: var(--card-bg);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background-color: var(--text-color);
    transition: var(--transition);
}

/* Responsive Design */
@media (min-width: 1024px) {
    .logo-image {
        max-height: 45px;
        max-width: 200px;
    }
}

@media (min-width: 769px) {
    .logo-image {
        max-height: 40px;
        max-width: 180px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--bg-color);
        flex-direction: column;
        padding: 2rem;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        box-shadow: var(--shadow);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: none;
        padding-left: 1rem;
    }

    .hamburger {
        display: flex;
    }

    .logo-image {
        height: 25px;
    }
}

@media (max-width: 480px) {
    .logo-image {
        height: 22px;
        max-width: 120px;
    }
}