/* default settings */
html {
  box-sizing: border-box;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --main-text-cl: #757575;
  --add-cl: #212121;
  --white-cl: #ffffff;
  --black-cl: #000000;
  --accent-cl: #2196f3;
  --background-dark: #2f303a;
  --alt-background: #f5f4fa;
}

body {
  font-family: 'Roboto', sans-serif;
  color: var(--main-text-cl);  
  font-size: 14px;
  background-color: var(--white-cl);
  letter-spacing: 0.03em;
}

/* general settings */

/*resset*/ 

h1,
h2,
h3,
h4,
h5,
h6,
p,
ul {
  margin: 0;
  padding: 0;
}



  /* outline: 2px solid red; */



img {
  display: block;
  height: auto;
  max-width: 100%;
}

.button-cursor {
  cursor: pointer;
}

.list {
  padding: 0;
  margin: 0;
}

.no-bullet {
  list-style: none;
}

.visually-hidden {
  position: absolute;
  clip: rect(1px 1px 1px 1px);
  clip: rect(1px, 1px, 1px, 1px);
  padding: 0;
  border: 0;
  height: 1px;
  width: 1px;
  overflow: hidden;
}


.link {
  text-decoration: none;
}

.container {
  max-width: 1200px;
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: 15px;
  padding-right: 15px;
}


.logo {  

  font-family: "Raleway";
  font-weight: 700;
  font-size: 26px;
  line-height: 1.19;
  color: var(--accent-cl); 
}

.logo-black {
  color: var(--black-cl);
}

.logo-white {
  color: var(--white-cl);
}

.header {
  border-bottom: 1px solid #ececec;
}


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

.nav-class {
  margin-left: 93px;
}

.nav-item:not(:last-child) {
  margin-right: 50px;
}


.nav-link,.header-link { 

  display: block;
  padding-top: 32px;
  padding-bottom: 32px;

  font-weight: 500;  
  line-height: 1.14;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--add-cl);
 
}

.nav-list {
  display: flex;  
}

.contact-list {
  display: flex;
  margin-left: auto;
}

.contact-list + .contact {
  margin-left: 50px;
}

.header-link,
.header-contacts {
  

  text-decoration: none;
  color: var(--main-text-cl);
}

.current {
  color: var(--accent-cl);
}  




/* hovers and accents */
.nav-class,
.nav-link:hover,
.header-link:hover,
.header-link:focus,
.title-accent-one,
.footer-contacts:hover,
.footer-contacts:focus {
  color: var(--accent-cl);
}





/* footer settings */

.footer {
  padding-top: 60px;
  padding-bottom: 60px;
  background-color: var(--background-dark);
  color: var(--white-cl);
}

.footer-contact {
  margin-top: 20px;
}

.footer-list:not(:first-child) {
  margin-top: 9px;
}

.footer-title,
.footer-link {
  font-family: 'Raleway';
  font-weight: 700;
  font-size: 26px;
  line-height: 1.19;
  letter-spacing: 0.03em;
  text-decoration: none;
  color: var(--white-cl);
}

.footer-address {
  font-family: 'roboto';
  font-weight: 400;
  font-size: 14px;
  line-height: 1.7;
  letter-spacing: 0.03em;
  font-style: normal;
}

.footer-contacts {
  font-family: 'roboto';
  font-weight: 400;
  font-size: 14px;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: rgba(255, 255, 255, 0.6);
  font-style: normal;
}

/* body settings*/

/* 2-lvl headings */

.section-title {

  margin-bottom: 50px;   
  font-size: 36px;
  line-height: 1.16;
  text-align: center;
  color: var(--add-cl);
}

/* hero home page */

.hero {
  max-width: 1600px;
  height: 600px;
  margin-left: auto;
  margin-right: auto;  
  padding-top: 200px;
  padding-bottom: 200px;
  text-align: center;
  background-color: var(--background-dark);
  color: var(--white-cl);
}

.hero-heading {

  margin-bottom: 30px;  
  max-width: 696px;
  margin-left: auto;
  margin-right:auto;  

  font-weight: 900;
  font-size: 44px;
  line-height: 1.36;
  text-align: center;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero-button {

  border-radius: 4px;
  border: 1px solid transparent;
  padding: 10px 32px;
  font-weight: 700;
  font-size: 16px;
  font-family: inherit;
  line-height: 1.8;
  letter-spacing: 0.06em;
  background-color: var(--accent-cl);
  color: var(--white-cl);
}

.hero-button:hover,
.hero-button:focus {
  color: var(--accent-cl);
  background-color: var(--white-cl);
}

/* features section home page */

.features {
padding-top: 94px;
padding-bottom: 94px;}

.feature {
  display: flex;
  margin-right: -30px;
}

.feature-items {
  margin-right: 30px;
  max-width: 270px;
}

.feature-title {

  margin-bottom: 10px;
  font-size: 14px;
  line-height: 1.14;
  text-transform: uppercase;
  color: var(--add-cl);
}

.features-text {
  line-height: 1.71;
}

.activity {
  padding-bottom: 94px;
}

.list-work {
  display: flex;
}

.work-item:not(:last-child) {
  margin-right: 30px;
}

/* our team section home page */

.team {

  padding-bottom: 94px;
  padding-top: 94px;
  background-color: var(--alt-background);
}

.list-team {
  display: flex;
}

.member-card:not(:last-child) {
  margin-right: 30px; 
  
}

.box {
  box-shadow: 0px 1px 3px rgba(0, 0, 0, 0.12), 0px 1px 1px rgba(0, 0, 0, 0.14), 0px 2px 1px rgba(0, 0, 0, 0.2);
  border-bottom-left-radius: 4px;
  border-bottom-right-radius: 4px;
  background-color: var(--white-cl);
}


.member-team {
  padding: 30px 0px;
}

.member-name {
  margin-top: 35px;
  font-weight: 500;
  font-size: 16px;
  line-height: 1.18;
  text-align: center;  
  color: var(--add-cl);
}

.member-position {

  margin-top: 10px;  
  padding-bottom: 30px;
  font-size: 16px;
  line-height: 1.18;
  text-align: center; 
}

/* portfolio page body*/

.portfolio {
  padding-top: 94px;
  padding-bottom: 94px;
}

.portfolio-buttons {
  display:flex;
  justify-content: center;
  margin-bottom: 50px;
}


.button-list:not(:last-child) {
  margin-right: 8px;
}

.portfolio-button {

  display: inline-block;
  min-width: 73px;
  border-radius: 4px;
  border: 1px solid transparent;
  padding: 6px 22px;
  font-family: "Roboto", sans-serif;
  font-weight: 500;
  font-size: 16px;
  line-height: 1.63;
  letter-spacing: 0.03em;
  text-align: center;
  background-color: var(--alt-background);
  color: var(--black-cl);
  cursor: pointer;
}

.portfolio-button:hover,
.portfolio-button:focus {
  background-color: var(--accent-cl);
  color: var(--white-cl);
}

.active {
  background-color: var(--accent-cl);
  color: var(--white-cl);
}


.portfolio-cards {
  display: flex;
  flex-wrap: wrap;


}

.portfolio-card:not(:nth-child(3n)) {
  margin-right: 30px;
  
}

.portfolio-card {
  margin-bottom:30px;
}

 .portfolio-card:nth-child(n+7) {
  margin-bottom: 0;
 }


.portfolio-name {
  border: 1px solid #eeeeee; 
  border-top: transparent;
  padding: 20px 24px;
}

.card-heading {
  font-size: 18px;
  line-height: 2;
  letter-spacing: 0.06em;
  color: var(--add-cl);
}

.card-descr {
  font-size: 16px;
  line-height: 1.87;  
  font-weight: 400;
}