body {
    font-family: 'Roboto', sans-serif;
    color: #434455;
    background-color: #ffffff;
}

/* ====== RESET STYLES ====== */

ul, ol {
    list-style-type: none;
    margin: 0;
    padding: 0;
}

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

a {
    text-decoration: none;
}

img {
    display: block;
}

/* ====== COMMON STYLES ====== */

.container {
    max-width: calc(1128px + 15px + 15px);
    padding: 0 15px;
    margin: 0 auto;
}

/* ====== HEADER STYLES ====== */

.page-header {
   border-bottom: 1px solid #e7e9fc;  
   box-shadow: 
   0 1px 6px 0 rgba(46, 47, 66, 0.08), 
   0 1px 1px 0 rgba(46, 47, 66, 0.16), 
   0 2px 1px 0 rgba(46, 47, 66, 0.08);
}

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

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

/* ====== LOGO STYLES ====== */

.logo {
    font-family: 'Raleway', sans-serif;
    font-weight: 700;
    font-size: 18px;
    line-height: 1.17;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: #4d5ae5;
}

.header-logo {
    padding: 24px 0;
    margin-right: 76px;
}

.header-logo .logo-part {
    color: #2e2f42;
}

/* ====== NAVIGATION STYLES ====== */

.nav-list {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    position: relative;
    padding: 24px 0;
    display: block;
    font-weight: 500;
    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.02em;
    color: #2e2f42;

    transition: color 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link:hover,
.nav-link:focus {
    color: #404bbf;
}

.nav-link.current {
    position: relative;
    color: #404bbf;

}

.nav-link::after {
    content: '';

    position: absolute;
    left: 0;
    bottom: -1px;

    width: 100%;
    height: 4px;
    border-radius: 2px;

    background-color: #404bbf;

    opacity: 0;

    transition: opacity 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link:hover::after,
.nav-link:focus::after,
.nav-link.current::after {
    opacity: 1;
}    

/* ====== CONTACTS STYLES ====== */

.contacts {
    font-style: normal;
    margin-left: auto;
}

.contacts-list {
    display: flex;
    align-items: center;
    gap: 40px;
}

.contacts-link {
    padding: 24px 0;
    display: block;
    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.02em;
    color: #434455;

    transition: color 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.contacts-link:hover,
.contacts-link:focus {
    color: #404bbf;
}

/* ====== HERO STYLES ====== */

.hero-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.hero {
    background-color: #2e2f42;
    padding: 188px 0;

    background-image: linear-gradient(rgba(46, 47, 66, 0.7), rgba(46, 47, 66, 0.7)),
    url(../images/hero/bg-people-office.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
    max-width: 1440px;
    margin-left: auto;
    margin-right: auto;
}

.hero-title {
    font-weight: 700;
    font-size: 56px;
    line-height: 1.07;
    letter-spacing: 0.02em;
    text-align: center;
    color: #ffffff;

    max-width: 496px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 48px;
}

/* ====== BUTTON STYLES ====== */

.hero-button {
    font-weight: 500;
    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.04em;
    color: #ffffff;
    background-color: #4d5ae5;
    text-align: center;
    cursor: pointer;

    display: block;
    margin-left: auto;
    margin-right: auto;
    padding: 16px 32px;
    border: none;
    border-radius: 4px;

    box-shadow: 
    0 4px 4px 0 rgba(0, 0, 0, 0.15);
    transition: background-color 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-button:hover,
.hero-button:focus {
    background-color: #404bbf;
}

/* ====== FEATURES STYLES ====== */

.features {
    padding-top: 120px;
    padding-bottom: 120px;
}

.features-list {
    display: flex;
    gap: 24px;
}

.features-item {
    width: calc((100% - 3 * 24px) / 4);
}

.features-subtitle {
    font-weight: 500;
    font-size: 20px;
    line-height: 1.2;
    letter-spacing: 0.02em;
    color: #2e2f42;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  border: 0;
  padding: 0;
  white-space: nowrap;
  clip-path: inset(100%);
  clip: rect(0 0 0 0);
  overflow: hidden;
}


.features-text {
    margin-top: 8px;
    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.02em;
    color: #434455;
}

.features-icon-box {
    height: 112px;
    background-color: #f4f4fd;
    border: 1px solid #8e8f99;
    border-radius: 4px;

    display: flex;
    align-items: center;
    justify-content: center;

    margin-bottom: 8px;
}

/* ====== OUR TEAM STYLES ====== */

.our-team {
    background-color: #f4f4fd;
    padding: 120px 0;
}

.header-team {
    font-weight: 700;
    font-size: 36px;
    line-height: 1.11;
    letter-spacing: 0.02em;
    text-align: center;
    color: #2e2f42;

    margin-bottom: 72px;
}

.team-list {
    display: flex;
    gap: 24px;
}

.team-box {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 8px;
    padding: 32px 16px;
}

.team-item {
    background-color: #ffffff;
    width: calc((100% - 3 * 24px) / 4);
    border-radius: 0 0 4px 4px;
    box-shadow: 
    0 2px 1px 0 rgba(46, 47, 66, 0.08), 
    0 1px 1px 0 rgba(46, 47, 66, 0.16), 
    0 1px 6px 0 rgba(46, 47, 66, 0.08);
}

.team-name {
    font-weight: 500;
    font-size: 20px;
    line-height: 1.2;
    letter-spacing: 0.02em;
    text-align: center;
    color: #2e2f42;
}

.team-position {
    font-weight: 400;
    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.02em;
    text-align: center;
    color: #434455;
}

/* ====== SOCIAL MEDIA STYLES ====== */

.team-social-list {
    display: flex;
    justify-content: center;
    gap: 24px;
}

.team-social-item {
    width: 40px;
    height: 40px;
}

.social-link-item {
    width: 100%; 
    height: 100%;
    background-color: #4d5ae5;
    border-radius: 50%;

    display: flex;
    align-items: center;
    justify-content: center;

    transition: background-color 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.social-icon {
    fill: #f4f4fd;
}

.social-link-item:hover,
.social-link-item:focus {
    background-color: #404bbf;
}

/* ====== PORTFOLIO STYLES ====== */

.our-portfolio {
    padding: 120px 0;
}

.portfolio-list {
    display: flex;
    flex-wrap: wrap;
    gap: 48px 24px;
}

.portfolio-item {
    background-color: #fff;
    width: calc((100% - 2 * 24px) / 3);
    transition: box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.portfolio-item:hover,
.portfolio-item:focus {
    box-shadow: 
    0 2px 1px 0 rgba(46, 47, 66, 0.08), 
    0 1px 1px 0 rgba(46, 47, 66, 0.16), 
    0 1px 6px 0 rgba(46, 47, 66, 0.08);
}

.overlay-portfolio-box {
    position: relative;
    overflow: hidden;
}

.overlay-portfolio-text {
    color: #f4f4fd;
    background-color: #4d5ae5;

    font-weight: 400;
    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.02em;

    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    padding: 40px 32px;
    overflow: auto;

    transform: translateY(100%);
    transition: transform 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.portfolio-item:hover .overlay-portfolio-text,
.portfolio-item:focus .overlay-portfolio-text  {
    transform: translateY(0);
}

.portfolio-box {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    flex-direction: column;
    gap: 8px;

    padding: 32px 16px;
    border: 1px solid #e7e9fc;
    border-top: none;
}

.portfolio-title {
    font-weight: 700;
    font-size: 36px;
    line-height: 1.11;
    letter-spacing: 0.02em;
    text-align: center;
    color: #2e2f42;

    margin-bottom: 72px;
}

.portfolio-subtitle {
    font-weight: 500;
    font-size: 20px;
    line-height: 1.2;
    letter-spacing: 0.02em;
    color: #2e2f42;
}

.portfolio-text {
    font-weight: 400;
    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.02em;
}

/* ====== FOOTER STYLES ====== */

.page-footer {
    background-color: #2e2f42;
    padding: 100px 0;
}

.footer {
    display: flex;
    align-items: baseline;
}

.footer-box {
  margin-right: 120px;
}

.footer-logo {
    display: inline-block;
    margin-bottom: 16px;
}

.footer-logo .logo-part {
    color: #f4f4fd;
}

.footer-description {
    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.02em;
    color: #f4f4fd;
    max-width: 264px;
}

.footer-social-text {
    color: #ffffff;
    font-weight: 500;
    margin-bottom: 16px;

    line-height: 1.5;
    letter-spacing: 0.02em;
}

.footer-social-list {
  display: flex;
  gap: 16px;
}

.footer-social-item {
    width: 40px;
    height: 40px;
}

.social-footer-box .social-link-item:hover,
.social-footer-box .social-link-item:focus {
    background-color: #31d0aa;
}

.footer-subscribe {
  margin-left: auto;
}

.footer-subscribe-text {
  color: #ffffff;
  font-weight: 500;
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  margin-bottom: 16px;
}

.footer-form {
  display: flex;
  gap: 24px;
}

.footer-input {
  width: 264px;
  height: 40px;
  font-size: 12px;
  line-height: 2;
  letter-spacing: 0.04em;
  padding: 8px 16px;
  border: 1px solid #ffffff;
  border-radius: 4px;
  background-color: transparent;
  color: #ffffff;
  box-shadow: 0 4px 4px 0 rgba(0, 0, 0, 0.15);
  transition: border-color 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.footer-input::placeholder {
  color: #ffffff;
}

.footer-input:focus {
  border-color: #31d0aa;
  outline: none;
}

.footer-input:focus-visible {
  outline: none;
}

.footer-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;

  min-width: 165px;
  height: 40px;

  background-color: #4d5ae5;
  color: #ffffff;

  border: none;
  border-radius: 4px;

  cursor: pointer;

  transition: background-color 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.footer-button:hover,
.footer-button:focus {
    background-color: #31d0aa;
}

.footer-button svg {
  fill: #ffffff;
}

/* ====== MODAL WINDOW STYLES ====== */

.backdrop {
    position: fixed;
    top: 0;
    left: 0;

    width: 100%;
    height: 100%;

    background-color: rgba(46, 47, 66, 0.4);

    opacity: 0;
    visibility: hidden;
    pointer-events: none;

    transition: 
    opacity 250ms cubic-bezier(0.4, 0, 0.2, 1),
    visibility 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.backdrop.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.modal {
    padding: 72px 24px 24px;
    position: absolute;
    top: 50%; 
    left: 50%;
    width: 408px;
    min-height: 584px;
    border-radius: 4px;
    
    transform: translate(-50%, -50%);
    
    box-shadow: 
    0 1px 1px 0 rgba(0, 0, 0, 0.14), 
    0 1px 3px 0 rgba(0, 0, 0, 0.12), 
    0 2px 1px 0 rgba(0, 0, 0, 0.2);
   background-color: #fcfcfc;
   
   transition: transform 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.backdrop:not(.is-open) .modal {
    transform: translate(-50%, -100%);
} 

.modal-close-button {
    position: absolute;
    top: 24px;
    right: 24px;

    width: 24px;
    height: 24px;

    border-radius: 100%;
    border: 1px solid rgba(0, 0, 0, 0.1);
    background-color: #e7e9fc;

    display: flex;
    align-items: center;
    justify-content: center;

    cursor: pointer;

    transition: 
    background-color 250ms cubic-bezier(0.4,0,0.2,1),
    border 250ms cubic-bezier(0.4,0,0.2,1);
}

.modal-close-button svg {
  fill: #2e2f42;

  transition: fill 250ms cubic-bezier(0.4,0,0.2,1);
}

.modal-close-button:hover,
.modal-close-button:focus {
    background-color: #404bbf;
    border: none;
}

.modal-close-button:hover svg,
.modal-close-button:focus svg {
  fill: #fff;
}

.modal-text {
  font-weight: 500;
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: 0.02em;

  text-align: center;
  margin-bottom: 16px;
  color: #2e2f42;
}

/* ====== FORM STYLES ====== */

.modal-field {
  margin-bottom: 8px;
}

.modal-field:last-of-type {
  margin-bottom: 16px;
}

.modal-label {
  font-size: 12px;
  line-height: 1.17;
  letter-spacing: 0.04em;

  color: #8e8f99;
  margin-bottom: 4px;
  display: block;
}

.input-wrap {
  position: relative;
}

.modal-input {
  width: 100%;
  height: 40px;
  padding-left: 38px;

  border: 1px solid rgba(46,47,66,0.4);
  border-radius: 4px;
  outline: transparent;

  transition: border-color 250ms cubic-bezier(0.4,0,0.2,1);
}

.modal-input:focus {
  border-color: #4d5ae5;
}

.modal-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);

  fill: #2e2f42;

  transition: fill 250ms cubic-bezier(0.4,0,0.2,1);
}

.modal-input:focus + .modal-icon {
  fill: #4d5ae5;
}

/* ====== TEXTAREA STYLES ====== */

.modal-textarea {
  width: 100%;
  height: 120px;
  resize: none;

  font-size: 12px;
  line-height: 1.17;
  letter-spacing: 0.04em;
  color: #8e8f99;

  border: 1px solid rgba(46,47,66,0.4);
  border-radius: 4px;
  padding: 8px 16px;

  transition: border-color 250ms cubic-bezier(0.4,0,0.2,1);
}

.modal-textarea:focus {
  border-color: #4d5ae5;
  outline: transparent;
}

/* ====== CHECKBOX STYLES ====== */

.modal-checkbox {
  margin: 0 0 24px 0;
}

.checkbox-label {
  font-size: 12px;
  line-height: 1.17;
  letter-spacing: 0.04em;
  color: #8e8f99;
  display: flex;
  align-items: center;
  gap: 8px;
}

.checkbox-custom {
  width: 16px;
  height: 16px;
  border: 1px solid rgba(46,47,66,0.4);
  border-radius: 2px;

  display: flex;
  align-items: center;
  justify-content: center;

  fill: transparent;

  transition: all 250ms cubic-bezier(0.4,0,0.2,1);
}

.modal-checkbox-input:checked + .checkbox-label .checkbox-custom {
  background-color: #404bbf;
  border: none;
  fill: #f4f4fd;
}

.checkbox-link {
  color: #4d5ae5;
  text-decoration: underline;
}

/* ====== MODAL BUTTON STYLES ====== */

.modal-submit-button {
  display: block;
  margin: 0 auto;

  min-width: 169px;
  height: 56px;

  background-color: #4d5ae5;
  color: #fff;

  border: none;
  border-radius: 4px;

  cursor: pointer;

  transition: background-color 250ms cubic-bezier(0.4,0,0.2,1);

  box-shadow: 0 4px 4px 0 rgba(0, 0, 0, 0.15);
}

.modal-submit-button:hover,
.modal-submit-button:focus {
  background-color: #404bbf;
}