/* ===================================
   LAYOUT BASE - Estrutura Reutilizável
   Header, Navigation, Footer e Container
   =================================== */

/* === HEADER === */
.site-header {
    background-color: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.header-container {
    max-width: var(--container-2xl);
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
}

/* === LOGO === */
.site-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
    transition: opacity var(--transition-base);
}

.site-logo:hover {
    opacity: 0.85;
}

.site-logo-icon {
    width: 40px;
    height: 40px;
    background-color: var(--color-primary);
    color: var(--color-text-white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    flex-shrink: 0;
}

.site-logo-text {
    font-family: var(--font-heading);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

/* === NAVIGATION === */
.site-nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    list-style: none;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    color: var(--color-text-primary);
    text-decoration: none;
    transition: color var(--transition-base);
    position: relative;
}

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

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: var(--spacing-md);
    right: var(--spacing-md);
    height: 2px;
    background-color: var(--color-primary);
}

/* === HEADER ACTIONS === */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* === MOBILE MENU TOGGLE === */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    color: var(--color-text-primary);
}

.mobile-menu-icon {
    width: 24px;
    height: 2px;
    background-color: currentColor;
    display: block;
    position: relative;
}

.mobile-menu-icon::before,
.mobile-menu-icon::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background-color: currentColor;
    left: 0;
    transition: transform var(--transition-base);
}

.mobile-menu-icon::before {
    top: -8px;
}

.mobile-menu-icon::after {
    bottom: -8px;
}

/* === HERO SECTION === */
.hero-section {
    background-color: var(--color-bg-primary);
    padding: var(--spacing-3xl) var(--spacing-lg);
    text-align: center;
}

.hero-container {
    max-width: var(--container-lg);
    margin: 0 auto;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    line-height: var(--line-height-tight);
}

.hero-subtitle {
    font-size: var(--font-size-md);
    color: var(--color-text-secondary);
    font-style: italic;
    margin-bottom: var(--spacing-xl);
}

.hero-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* === MAIN CONTENT === */
.main-content {
    max-width: var(--container-2xl);
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-lg);
    min-height: 60vh;
}

/* === SECTION === */
.section {
    margin-bottom: var(--spacing-3xl);
}

.section-header {
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-family: var(--font-heading);
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
}

/* === FOOTER === */
.site-footer {
    background-color: var(--color-bg-dark);
    color: var(--color-text-white);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    margin-top: auto;
}

.footer-container {
    max-width: var(--container-2xl);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-title {
    font-family: var(--font-heading);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-white);
    margin-bottom: var(--spacing-sm);
}

.footer-text {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
    line-height: var(--line-height-relaxed);
}

.footer-link {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-link:hover {
    color: var(--color-secondary);
}

.footer-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* === FOOTER BOTTOM === */
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    padding-top: var(--spacing-lg);
}

.footer-copyright {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
}

.footer-social {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.social-link {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-white);
    transition: all var(--transition-base);
}

.social-link:hover {
    background-color: var(--color-primary);
    transform: translateY(-2px);
}

/* === RESPONSIVIDADE === */
@media (max-width: 1024px) {
    .header-container {
        padding: var(--spacing-md);
    }

    .nav-list {
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }

    .site-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-bg-primary);
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-lg);
        display: none;
    }

    .site-nav.is-open {
        display: block;
    }

    .nav-list {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }

    .nav-link {
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-border-light);
    }

    .nav-link.active::after {
        bottom: 0;
        left: 0;
        right: auto;
        width: 3px;
        height: 100%;
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-base);
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .site-logo-text {
        font-size: var(--font-size-base);
    }

    .hero-title {
        font-size: var(--font-size-2xl);
    }

    .main-content {
        padding: var(--spacing-md) var(--spacing-xs);
        /* Reduz padding lateral drasticamente */
    }

    .hero-section {
        padding: var(--spacing-xl) var(--spacing-md);
    }
}