/* ================== GLOBAL STYLES & RESETS (A5) ================== */
body {
  font-family: "Roboto", sans-serif;
  color: #434455;
  background-color: #ffffff;
}

body.modal-open {
  overflow: hidden;
}

h1,
h2,
h3,
p {
  margin: 0;
}

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

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

a {
  text-decoration: none;
  color: inherit;
}

.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;
}

/* ================== COMMON CLASSES ================== */
.container {
  /* A1: Запобігання горизонтальній прокрутці */
  max-width: 320px;
  margin: 0 auto;
  padding: 0 16px;
}

.section {
  padding-top: 96px;
  padding-bottom: 96px;
}

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

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-nav {
  display: flex;
  align-items: center;
}
.logo-header {
  font-family: "Raleway", sans-serif;
  font-weight: 700;
  font-size: 18px;
  line-height: 1.17;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #4d5ae5;
  padding-bottom: 16px;
  padding-top: 16px;
}

.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;
  padding: 0;
}

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

/* Приховуємо десктопну навігацію на мобільних */
.nav-list,
.contacts {
  display: none;
}

.menu-open-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  background-color: transparent;
  border: none;
  cursor: pointer;
}

/* === FIX: Додано колір для іконки бургера === */
.menu-open-icon {
  fill: #2e2f42;
}

/* ================== MOBILE MENU (C1-C6) ================== */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%; /* C4: Займає весь в'юпорт по висоті */
  background-color: #ffffff;
  z-index: 999;
  flex-direction: column;

  /* C5: Спочатку меню приховано */
  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);
}

/* C6: Клас is-open робить меню видимим */
.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.mobile-menu-container {
  display: flex;
  padding: 72px 16px 40px;
  flex-direction: column;
  height: 100%;
  justify-content: space-between;
}

.menu-close-btn {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  border: 1px solid rgba(0, 0, 0, 0.1);
  padding: 0;
  cursor: pointer;
  transition: background-color 250ms cubic-bezier(0.4, 0, 0.2, 1),
    border 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

.menu-close-icon {
  transition: fill 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.menu-close-btn:hover .menu-close-icon,
.menu-close-btn:focus .menu-close-icon {
  fill: #ffffff;
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.mobile-nav-link {
  font-weight: 700;
  font-size: 36px;
  line-height: 1.11;
  letter-spacing: 0.02em;
  color: #2e2f42;
  transition: color 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

.mobile-contacts-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.mobile-contacts-link {
  font-style: normal;
  font-weight: 500;
  font-size: 24px;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: #434455;
  transition: color 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-contacts-link.accent {
  color: #4d5ae5;
  font-size: 24px; /* Або 36px, залежно від макету */
}

.mobile-social-list {
  display: flex;
  justify-content: flex-start;
  gap: 40px;
  margin-top: 48px;
}

/* ================== HERO SECTION ================== */
.effective-solutions {
  max-width: 320px;
  margin-left: auto;
  margin-right: auto;
  padding: 72px 0;
  text-align: center;
  background-image: linear-gradient(
      rgba(46, 47, 66, 0.7),
      rgba(46, 47, 66, 0.7)
    ),
    url("../images/heroimages/hero-image-mob.jpg");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
@media (min-resolution: 2dppx) {
  .effective-solutions {
    max-width: 320px;
    margin-left: auto;
    margin-right: auto;
    padding: 72px 0;
    text-align: center;
    background-image: linear-gradient(
        rgba(46, 47, 66, 0.7),
        rgba(46, 47, 66, 0.7)
      ),
      url("../images/heroimages/hero-image-mob@2x.jpg");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
  }
}

.effective-solutions-text {
  max-width: 216px;
  margin: 0 auto 72px;
  color: #ffffff;
  font-size: 36px;
  line-height: 1.11;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: capitalize;
}

.btn {
  display: block;
  min-width: 169px;
  height: 56px;
  margin: 0 auto;
  padding: 16px 32px;
  border: none;
  border-radius: 4px;
  box-shadow: 0 4px 4px 0 rgba(0, 0, 0, 0.15);
  background-color: #4d5ae5;
  color: #ffffff;
  cursor: pointer;
  font-family: "Roboto", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: background-color 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ================== BENEFITS SECTION ================== */
.benefits-scroll {
  display: flex;
  flex-direction: column;
  gap: 72px;
}

.benefit-icon-container {
  display: none; /* Приховуємо на мобільних згідно макету */
}

.benefits-list {
  margin-bottom: 8px;
  color: #2e2f42;
  font-size: 36px;
  line-height: 1.11;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-align: center;
}

.benefits-text {
  color: #434455;
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  font-weight: 500;
}

/* ================== TEAM SECTION ================== */
.team-section {
  background-color: #f4f4fd;
}

.team-page {
  margin-bottom: 72px;
  color: #2e2f42;
  font-size: 36px;
  line-height: 1.11;
  text-align: center;
  text-transform: capitalize;
}

.team-scroll {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 72px;
}

.team-list {
  width: 264px;
  background-color: #ffffff;
  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);
}

.card-content {
  padding: 32px 0;
  text-align: center;
}

.team-name {
  margin-bottom: 8px;
  color: #2e2f42;
  font-size: 20px;
  line-height: 1.2;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.team-job-title {
  color: #434455;
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  margin-bottom: 8px;
}

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

.social-icon-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: #4d5ae5;
  border-radius: 50%;
  transition: background-color 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

.social-icon {
  fill: #f4f4fd;
}

/* ================== PORTFOLIO SECTION ================== */
.potfolio-page {
  margin-bottom: 72px;
  color: #2e2f42;
  font-size: 36px;
  line-height: 1.11;
  text-align: center;
  text-transform: capitalize;
}

.potfolio-scroll {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.potfolio-item {
  transition: box-shadow 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

.portfolio-image-wrap {
  position: relative;
  overflow: hidden;
}

.overlay-text {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  padding: 40px 32px;
  background-color: #4d5ae5;
  color: #f4f4fd;
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  transform: translateY(100%);
  transition: transform 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.potfolio-item:hover .overlay-text {
  transform: translateY(0);
}

.potfolio-content {
  padding: 32px 16px;
  border: 1px solid #e7e9fc;
  border-top: none;
}

.portfolio-list {
  margin-bottom: 8px;
  color: #2e2f42;
  font-size: 20px;
  line-height: 1.2;
  font-weight: 500;
  letter-spacing: 0.02em;
}

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

/* ================== FOOTER ================== */
.page-footer {
  background: #2e2f42;
  padding: 96px 0;
}

.footer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 72px;
}

.footer-logo-wrap {
  text-align: center;
}

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

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

.page-footer-text {
  max-width: 288px;
  font-size: 16px;
  line-height: 1.5;
  color: #f4f4fd;
  letter-spacing: 0.02em;
  text-align: left;
}

.footer-social-wrap {
  text-align: center;
}

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

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

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

.footer-subscribe-wrap {
  text-align: center;
}

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

.subscribe-form {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.subscribe-input {
  width: 288px;
  height: 40px;
  border: 1px solid #ffffff;
  background-color: transparent;
  font-size: 12px;
  line-height: 2;
  letter-spacing: 0.04em;
  padding-left: 16px;
  box-shadow: 0px 4px 4px rgba(0, 0, 0, 0.15);
  border-radius: 4px;
  color: #ffffff;
  opacity: 0.3;
}

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

.subscribe-button {
  min-width: 165px;
  height: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: "Roboto", sans-serif;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: #ffffff;
  cursor: pointer;
  background-color: #4d5ae5;
  border: none;
  border-radius: 4px;
}

.subscribe-icon {
  margin-left: 16px;
  fill: #ffffff;
}

/* ================== MODAL WINDOW ================== */
.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 {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 288px;
  min-height: 623px;
  background: #fcfcfc;
  box-shadow: 0px 1px 1px rgba(0, 0, 0, 0.14), 0px 1px 3px rgba(0, 0, 0, 0.12),
    0px 2px 1px rgba(0, 0, 0, 0.2);
  border-radius: 4px;
  transition: transform 250ms cubic-bezier(0.4, 0, 0.2, 1);
  padding: 72px 16px 24px 16px;
}

.modal-close-btn {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #e7e9fc;
  border: 1px solid rgba(0, 0, 0, 0.1);
  padding: 0;
  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-btn:hover,
.modal-close-btn:focus {
  background-color: #404bbf;
  border: none;
}

.modal-close-icon {
  transition: fill 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-close-btn:hover .modal-close-icon,
.modal-close-btn:focus .modal-close-icon {
  fill: #ffffff;
}

.modal-title {
  font-weight: 500;
  font-size: 16px;
  line-height: 1.5;
  text-align: center;
  letter-spacing: 0.02em;
  color: #2e2f42;
  margin-bottom: 16px;
}

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

.modal-field-comment {
  margin-bottom: 16px;
}

.modal-label {
  display: block;
  font-size: 12px;
  line-height: 1.17;
  letter-spacing: 0.04em;
  color: #8e8f99;
  margin-bottom: 4px;
}

.input-wrap {
  position: relative;
}

.modal-input {
  width: 100%;
  height: 40px;
  border: 1px solid rgba(46, 47, 66, 0.4);
  border-radius: 4px;
  background-color: transparent;
  padding-left: 38px;
  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%);
  transition: fill 250ms cubic-bezier(0.4, 0, 0.2, 1);
  fill: #2e2f42;
}

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

.modal-comment {
  width: 100%;
  height: 120px;
  font-size: 12px;
  line-height: 1.17;
  letter-spacing: 0.04em;
  color: rgba(46, 47, 66, 0.4);
  border: 1px solid rgba(46, 47, 66, 0.4);
  border-radius: 4px;
  background-color: transparent;
  padding: 8px 16px;
  outline: transparent;
  resize: none;
  transition: border-color 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

.modal-checkbox-field {
  margin-bottom: 24px;
}

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

.custom-checkbox {
  width: 16px;
  height: 16px;
  border: 1px solid rgba(46, 47, 66, 0.4);
  border-radius: 2px;
  transition: background-color 250ms cubic-bezier(0.4, 0, 0.2, 1),
    border 250ms cubic-bezier(0.4, 0, 0.2, 1),
    fill 250ms cubic-bezier(0.4, 0, 0.2, 1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  fill: transparent;
  margin-right: 8px;
}

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

.privacy-link {
  color: #4d5ae5;
  text-decoration: underline;
  flex-shrink: 0;
}

.modal-send-btn {
  display: block;
  min-width: 169px;
  height: 56px;
  margin: 0 auto;
}

/* ================== TABLET STYLES (min-width: 768px) (B2, B5) ================== */
@media screen and (min-width: 768px) {
  .container {
    max-width: 768px;
  }

  /* HEADER */
  .header-container {
    height: 72px;
  }

  .menu-open-btn {
    display: none;
  }
  .mobile-menu-container {
    display: none;
  }

  .mobile-menu {
    display: none;
  }
  .nav-list,
  .contacts {
    display: flex;
  }

  .header-nav .logo {
    margin-right: 120px;
  }

  .nav-list {
    gap: 40px;
  }

  .nav-link {
    position: relative;
    display: block;
    padding: 24px 0;
    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.active {
    color: #404bbf;
  }
  .nav-link.active::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 100%;
    height: 4px;
    background-color: #404bbf;
    border-radius: 2px;
  }

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

  .contacts {
    font-style: normal;
  }

  .contacts-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .contacts-link {
    font-size: 12px;
    line-height: 1.17;
    letter-spacing: 0.04em;
    color: #434455;
    transition: color 250ms cubic-bezier(0.4, 0, 0.2, 1);
  }

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

  /* HERO */
  .effective-solutions {
    max-width: 768px;
    padding: 112px 0;
    background-image: linear-gradient(
        rgba(46, 47, 66, 0.7),
        rgba(46, 47, 66, 0.7)
      ),
      url("../images/heroimages/hero-image-tab.jpg");
  }
  @media (min-resolution: 2dppx) {
    .effective-solutions {
      max-width: 768px;
      padding: 112px 0;
      background-image: linear-gradient(
          rgba(46, 47, 66, 0.7),
          rgba(46, 47, 66, 0.7)
        ),
        url("../images/heroimages/hero-image-tab@2x.jpg");
    }
  }
  .effective-solutions-text {
    max-width: 496px;
    font-size: 56px;
    line-height: 1.07;
    margin-bottom: 36px;
    text-transform: none;
  }

  /* BENEFITS */
  .benefits-scroll {
    flex-direction: row;
    flex-wrap: wrap;
    row-gap: 72px;
    column-gap: 24px;
  }

  .benefits-item {
    flex-basis: calc((100% - 24px) / 2);
  }

  .benefits-list {
    text-align: left;
  }

  /* TEAM */
  .team-scroll {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    row-gap: 64px;
    column-gap: 24px;
  }

  /* PORTFOLIO */
  .potfolio-scroll {
    flex-direction: row;
    flex-wrap: wrap;
    row-gap: 72px;
    column-gap: 24px;
  }

  .potfolio-item {
    flex-basis: calc((100% - 24px) / 2);
  }

  /* FOOTER */
  .footer-container {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: baseline;
    padding-left: 108px;
    gap: 72px 24px;
  }

  .footer-logo-wrap {
    text-align: left;
  }

  .page-footer-text {
    width: 264px;
  }

  .footer-social-wrap {
    text-align: left;
  }

  .footer-subscribe-wrap {
    text-align: left;
  }

  .subscribe-form {
    flex-direction: row;
    gap: 24px;
  }

  .subscribe-input {
    width: 264px;
    opacity: 1;
  }

  /* MODAL */
  .modal {
    width: 408px;
    min-height: 584px;
    padding: 72px 24px 24px 24px;
  }
}

/* ================== DESKTOP STYLES (min-width: 1158px) (B2, B5) ================== */
@media screen and (min-width: 1158px) {
  .container {
    max-width: 1158px;
    padding: 0;
  }

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

  /* HEADER */
  .header-nav .logo {
    margin-right: 76px;
  }
  .mobile-menu-container {
    display: none;
  }

  .contacts-list {
    flex-direction: row;
    gap: 40px;
  }

  .contacts-link {
    font-size: 16px;
    line-height: 1.5;
    letter-spacing: 0.02em;
    padding: 24px 0;
  }

  /* HERO */
  .effective-solutions {
    max-width: 1440px;
    padding: 188px 0;
    background-image: linear-gradient(
        rgba(46, 47, 66, 0.7),
        rgba(46, 47, 66, 0.7)
      ),
      url("../images/heroimages/hero-image-pc.jpg");
  }

  @media (min-resolution: 2dppx) {
    .effective-solutions {
      max-width: 1440px;
      padding: 188px 0;
      background-image: linear-gradient(
          rgba(46, 47, 66, 0.7),
          rgba(46, 47, 66, 0.7)
        ),
        url("../images/heroimages/hero-image-pc@2x.jpg");
    }
  }
  .effective-solutions-text {
    margin-bottom: 48px;
  }

  /* BENEFITS */
  .benefits-scroll {
    flex-wrap: nowrap;
    gap: 24px;
  }

  .benefits-item {
    flex-basis: calc((100% - 72px) / 4);
  }

  .benefit-icon-container {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 112px;
    background-color: #f4f4fd;
    border-radius: 4px;
    border: 1px solid #8e8f99;
    margin-bottom: 8px;
  }

  .benefits-list {
    font-size: 20px;
    line-height: 1.2;
    font-weight: 500;
  }

  .benefits-text {
    font-weight: 400;
  }

  /* TEAM */
  .team-scroll {
    flex-wrap: nowrap;
    gap: 24px;
  }

  /* PORTFOLIO */
  .potfolio-scroll {
    row-gap: 48px;
    column-gap: 24px;
  }

  .potfolio-item {
    flex-basis: calc((100% - 48px) / 3);
  }

  /* FOOTER */
  .page-footer {
    padding: 100px 0;
  }

  .footer-container {
    flex-wrap: nowrap;
    gap: 0;
    padding: 0 15px;
  }

  .footer-logo-wrap {
    margin-right: 120px;
  }

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