/* Header Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(30, 30, 30, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.header.scrolled {
    background-color: var(--color-surface);
    box-shadow: var(--elevation-2);
}

.header-container {
    max-width: var(--container-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 3);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    height: calc(var(--header-height) * 0.5);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.logo img {
    height: 100%;
    width: auto;
    transition: opacity 0.2s ease;
}

.logo:hover {
    transform: translateY(-1px);
}

.logo:hover img {
    opacity: 0.9;
}

/* Navegação Principal */
.main-nav ul {
    display: flex;
    gap: calc(var(--spacing-unit) * 4);
}

.main-nav a {
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1.25px;
    color: var(--color-text-secondary);
    padding: calc(var(--spacing-unit)) calc(var(--spacing-unit) * 2);
    position: relative;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 4px;
}

.main-nav a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateX(-50%);
    opacity: 0;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--color-text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.main-nav a:hover::before,
.main-nav a.active::before {
    width: calc(100% - var(--spacing-unit) * 4);
    opacity: 1;
}

/* Links Sociais */
.social-links {
    display: flex;
    gap: calc(var(--spacing-unit) * 2);
}

.social-links a {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--color-text-secondary);
    background-color: rgba(255, 255, 255, 0.05);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.social-links a::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--color-primary);
    opacity: 0;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.social-links a i {
    position: relative;
    z-index: 1;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.social-links a:hover {
    color: var(--color-text-primary);
    transform: translateY(-2px);
}

.social-links a:hover::before {
    opacity: 0.1;
}

.social-links a:hover i {
    transform: scale(1.1);
}

/* Menu Mobile */
.mobile-menu-button {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.05);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    z-index: 1001;
}

.mobile-menu-button span {
    position: absolute;
    width: 20px;
    height: 2px;
    background-color: var(--color-text-primary);
    left: 10px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu-button span:nth-child(1) { top: 14px; }
.mobile-menu-button span:nth-child(2) { top: 19px; }
.mobile-menu-button span:nth-child(3) { top: 24px; }

/* Responsividade */
@media (max-width: 768px) {
    .mobile-menu-button {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .mobile-menu-button:hover {
        background-color: rgba(255, 255, 255, 0.08);
    }

    .main-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background-color: var(--color-surface);
        padding: calc(var(--spacing-unit) * 3);
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        box-shadow: var(--elevation-2);
    }

    .main-nav.active {
        transform: translateX(0);
    }

    .main-nav ul {
        flex-direction: column;
        gap: calc(var(--spacing-unit) * 3);
    }

    .main-nav a {
        font-size: 1rem;
        padding: calc(var(--spacing-unit) * 2);
        display: block;
        text-align: center;
    }

    .social-links {
        display: none;
    }

    .mobile-menu-button.active {
        background-color: rgba(255, 255, 255, 0.08);
    }

    .mobile-menu-button.active span:nth-child(1) {
        transform: translateY(5px) rotate(45deg);
        background-color: var(--color-primary);
    }

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

    .mobile-menu-button.active span:nth-child(3) {
        transform: translateY(-5px) rotate(-45deg);
        background-color: var(--color-primary);
    }
}