:root {
  --neutral-first: #fff;
  --neutral-second: #000;
  --background-first: #fff;
  --background-second: #2f303a;
  --background-third: #f5f4fa;
  --background-accent: #2196f3;
  --background-opacity: rgba(255, 255, 255, 0.1);
  --background-accent-opacity: rgba(33, 150, 243, 0.9);
  --primary-text: #757575;
  --secondary-text: #ffffff;
  --primary-title: #212121;
  --secondary-title: #ffffff;
  --first-border: #eee;
  --icon-first: #afb1b8;
  --icon-second: #fff;
  --input-opacity: rgba(255, 255, 255, 0.6);
  --input-border-opacity: rgba(255, 255, 255, 0.3);
  --accent-color: #2196f3;
}

:root {
  --font-family: "Roboto", sans-serif;
  --second-family: "Raleway", sans-serif;
}
/* main settings */

body {
  padding: 0px;
  margin: 0px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.03em;
  font-family: var(--font-family);
}

.container {
  width: 1170px;
  margin: 0 auto;
}

/* header */

.header {
  padding: 25px 0px;
  border-bottom: 1px solid var(--first-border);
}

.header-container {
  display: flex;
  align-items: center;
}

.header-navigation {
  display: flex;
  align-items: center;
}

.header-list {
  display: flex;
  gap: 50px;
}

.header-info {
  display: flex;
  gap: 30px;
}

.header-logo-link {
  color: var(--neutral-second);
  font-weight: 700;
  font-size: 26px;
  font-family: var(--second-family);
  padding-right: 92px;
}

.header-logo-link > span {
  color: var(--accent-color);
}

.header-link {
  color: var(--primary-title);
  letter-spacing: 0.02em;
  transition: all 0.3s ease;
  position: relative;
}

.header-link:hover,
.header-link:focus {
  color: var(--accent-color);
}

.header-item:nth-of-type(2) > .header-link {
  color: var(--accent-color);
}

.header-item:nth-of-type(2) .header-link::after {
  content: "";
  display: inline-block;
  position: absolute;
  bottom: -185%;
  left: -3px;
  background-color: var(--accent-color);
  border-radius: 2px;
  height: 4px;
  width: 78px;
}

.header-mail,
.header-phone {
  transition: all 0.3s ease;
  display: flex;
  color: var(--primary-text);
  letter-spacing: 0.02em;
  align-items: center;
  gap: 10px;
}

.header-icon {
  width: 18px;
  height: 12px;
  fill: currentColor;
}

.header-phone > .header-icon {
  width: 10px;
  height: 16px;
}

.header-mail:hover,
.header-phone:hover,
.header-mail:focus,
.header-phone:focus {
  color: var(--accent-color);
}

.header-wrapper{
  display: flex;
  justify-content: space-between;
  width: 100%;
}

/* projects */

.projects {
  padding: 94px 0px;
}

.projects-container {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.projects-filter {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 50px;
}

.projects-btn {
  border: none;
  color: var(--primary-title);
  font-size: 16px;
  text-align: center;
  padding: 6px 22px;
  cursor: pointer;
  transition: 0.3s ease-in-out;
  line-height: 162%;
}

.projects-btn:hover,
.projects-btn:focus {
  color: var(--neutral-first);
  border-radius: 4px;
  box-shadow: 0 2px 2px 0 rgba(0, 0, 0, 0.12), 0 1px 2px 0 rgba(0, 0, 0, 0.08),
    0 3px 1px 0 rgba(0, 0, 0, 0.1);
  background-color: var(--background-accent);
}

.projects-list {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
  column-gap: 30px;
}

.projects-wrap {
  padding: 20px 24px;
  border: 1px solid var(--first-border);
  border-top: none;
}

.projects-tab {
  transition: 0.3s ease-in-out;
}

.projects-tab:hover,
.project-tab:focus {
  box-shadow: 1px 4px 6px 0 rgba(0, 0, 0, 0.16), 0 4px 4px 0 rgba(0, 0, 0, 0.06),
    0 1px 1px 0 rgba(0, 0, 0, 0.12);
}

.projects-tab:hover .projects-overlay,
.projects-tab:focus .projects-overlay {
  transform: translateY(0);
}

.projects-title {
  color: var(--primary-title);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.06em;
  line-height: 200%;
  margin-bottom: 4px;
}

.projects-mark {
  color: var(--primary-text);
  font-weight: 400;
  font-size: 16px;
  line-height: 187%;
}

.projects-overlay {
  position: absolute;
  top: 0px;
  left: 0;
  width: 100%;
  height: 100%;
  transform: translateY(100%);
  transition: transform 250ms ease-in-out;
  background-color: var(--background-accent-opacity);
  padding: 63px 24px;
}

.overlay-desc {
  font-weight: 400;
  font-size: 18px;
  line-height: 156%;
  color: var(--secondary-text);
  width: 322px;
}

.projects-wrapper {
  display: block;
  position: relative;
  overflow: hidden;
}

/* footer */

.footer {
  padding: 60px 0px;
  background-color: var(--background-second);
}

.footer-container {
  display: flex;
  flex-direction: column;
}

.footer-logo-link {
  color: var(--neutral-first);
  font-weight: 700;
  font-size: 26px;
  font-family: var(--second-family);
}

.footer-logo-link > span {
  color: var(--accent-color);
}

.footer-info {
  font-weight: 400;
  color: var(--secondary-text);
  font-style: normal;
  margin-top: 20px;
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer-address {
  color: var(--neutral-first);
  font-weight: 400;
  font-style: normal;
}

.footer-link {
  color: var(--primary-text);
  font-weight: 400;
  font-style: normal;
}

.footer-subtitle {
  font-weight: 700;
  color: var(--secondary-title);
  text-transform: uppercase;
  margin-bottom: 20px;
}

.footer-social-list {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
}

.social-icon {
  transition: all 0.3s ease;
  width: 20px;
  height: 20px;
  max-width: 44px;
  max-height: 44px;
  fill: var(--icon-second);
  border-radius: 100px;
  background-color: var(--background-opacity);
  padding: 12px;
  overflow: unset;
}

.social-icon:hover {
  overflow: unset;
  border-radius: 100px;
  background-color: var(--background-accent);
  padding: 12px;
}

.footer-main-list {
  display: flex;
  gap: 70px;
  align-items: center;
}

.footer-form {
  display: flex;
  gap: 12px;
}

.btn-icon {
  width: 24px;
  height: 24px;
  margin-left: 10px;
}

.footer-btn {
  display: flex;
  align-items: center;
  padding: 15px 28px;
  color: var(--secondary-text);
  background-color: var(--background-accent);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.06em;
  border-radius: 4px;
  cursor: pointer;
}

.footer-input {
  padding: 15px 16px;
  background-color: transparent;
  border: 1px solid var(--input-border-opacity);
  border-radius: 4px;
  color: var(--input-opacity);
  font-weight: 400;
  font-size: 16px;
  width: 358px;
}