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

/* ==== Desktop Header Layout ==== */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background-color: var(--primary-accent);
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-img {
    width: 52px;
    height: 52px;
    object-fit: contain;
    border-radius: 50%;
    display: block;
    flex-shrink: 0;
}

.logo a {
    text-decoration: none;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.logo-title {
    color: var(--white);
    font-size: 1.15rem;
    font-family: var(--font-brand);
    font-weight: 800;
    white-space: nowrap;
    letter-spacing: -0.01em;
}

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

.main-nav a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.95rem;
    font-family: var(--font-ui);
    font-weight: 500;
    padding: 0.3rem 0;
    position: relative;
    transition: color var(--transition);
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--text-light);
    transform: scaleX(0);
    transition: transform var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--text-light);
}

.main-nav a:hover::after,
.main-nav a.active::after {
    transform: scaleX(1);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    width: 30px;
    height: 24px;
    padding: 0;
    flex: 0 0 30px;
    min-width: 30px;
    min-height: 24px;
    flex-direction: column;
    justify-content: space-between;
    cursor: pointer;
    z-index: 1001;
}

.mobile-menu-toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--text-light);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: translateY(10px) rotate(45deg);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: translateY(-10px) rotate(-45deg);
}

/* ==== Mobile Queries ==== */
@media (max-width: 966px) {
    body.nav-open::before {
        content: '';
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.25);
        opacity: 1;
        pointer-events: auto;
        z-index: 90;
    }

    .mobile-menu-toggle {
        display: flex;
    }
    .main-header {
        padding: 0.75rem 0;
    }
    .logo-img {
        width: 42px;
        height: 42px;
    }
    .logo-title {
        font-size: 0.95rem;
    }
    
    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background-color: var(--white);
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.1);
        padding: 6rem 2rem 2rem;
        transition: var(--transition);
        z-index: 1000;
    }
    
    .main-nav.active {
        right: 0;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .main-nav a {
        display: block;
        font-size: 1.1rem;
        padding: 0.75rem 0;
        color: var(--primary-accent);
    }

    .main-nav a:hover,
    .main-nav a.active {
        color: var(--primary-accent);
    }
    
    .btn-donate {
        margin-left: 0;
        margin-top: 1rem;
        display: inline-block;
    }

}

@media (max-width: 768px) {
    body.nav-open::before {
        content: '';
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.25);
        opacity: 1;
        pointer-events: auto;
        z-index: 90;
    }

    .mobile-menu-toggle {
        display: flex;
    }
    .main-header {
        padding: 0.75rem 0;
    }
    .logo-img {
        width: 42px;
        height: 42px;
    }
    .logo-title {
        font-size: 0.95rem;
    }
    
    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background-color: var(--white);
        box-shadow: -5px 0 20px rgba(0, 0, 0, 0.1);
        padding: 6rem 2rem 2rem;
        transition: var(--transition);
        z-index: 1000;
    }
    
    .main-nav.active {
        right: 0;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .main-nav a {
        display: block;
        font-size: 1.1rem;
        padding: 0.75rem 0;
        color: var(--primary-accent);
    }

    .main-nav a:hover,
    .main-nav a.active {
        color: var(--primary-accent);
    }
    
    .btn-donate {
        margin-left: 0;
        margin-top: 1rem;
        display: inline-block;
    }
}

@media (max-width: 576px) {
    .header-content {
        gap: 0.75rem;
    }
    .logo {
        min-width: 0;
        flex: 1 1 auto;
    }
    .logo-link {
        min-width: 0;
    }
    .logo-title {
        font-size: 0.9rem;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
}