:root {
  --yellow: #ffd400;
  --black: #050505;
  --ink: #141414;
  --gray-900: #242424;
  --gray-700: #555555;
  --gray-200: #d9dde2;
  --gray-100: #eceff2;
  --gray-050: #f2f3f5;
  --white: #ffffff;
  --max: 1160px;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: var(--gray-050);
  line-height: 1.5;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(18px, 4vw, 48px);
  background-color: #ffd400;
  border-bottom: 1px solid rgba(5, 5, 5, 0.14);
}

.brand {
  display: inline-flex;
  align-items: center;
  background: transparent;
}

.brand img {
  width: clamp(190px, 18vw, 260px);
  height: auto;
  aspect-ratio: 250 / 80;
  object-fit: contain;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.main-nav a {
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--gray-900);
}

.main-nav a:hover,
.main-nav a:focus-visible {
  background: var(--yellow);
  outline: none;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--gray-200);
  background: var(--white);
  border-radius: var(--radius);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: var(--black);
}

.section-shell {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(60px, 8vw, 104px) clamp(18px, 4vw, 28px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 720px);
  gap: 0;
  align-items: center;
  max-width: none;
  min-height: calc(100vh - 82px);
  padding-left: max(clamp(18px, 4vw, 28px), calc((100vw - var(--max)) / 2 + 28px));
  padding-right: max(clamp(18px, 4vw, 28px), calc((100vw - var(--max)) / 2 + 28px));
  background-image:
    linear-gradient(90deg, rgba(242, 243, 245, 0.98) 0%, rgba(242, 243, 245, 0.92) 42%, rgba(242, 243, 245, 0.42) 70%, rgba(242, 243, 245, 0.22) 100%),
    url("assets/hero-notebook.png");
  background-position: center;
  background-size: cover;
  border-bottom: 1px solid var(--gray-200);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--black);
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  max-width: 780px;
  color: var(--black);
  font-size: clamp(2.55rem, 6vw, 5.8rem);
  line-height: 0.96;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  color: var(--black);
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.02;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  color: var(--black);
  font-size: 1.22rem;
  line-height: 1.2;
}

.hero-text,
.section-heading p,
.split-copy p,
.product-copy p,
.contact-copy p,
.final-cta p {
  color: var(--gray-700);
  font-size: 1.08rem;
}

.hero-text {
  max-width: 640px;
  margin: 24px 0 0;
}

.hero-actions,
.final-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.hero-actions {
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 13px 18px;
  border: 1px solid rgba(5, 5, 5, 0.18);
  border-radius: var(--radius);
  font-weight: 900;
  text-align: center;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(5, 5, 5, 0.12);
  outline: none;
}

.button-primary {
  background: var(--yellow);
  color: var(--black);
}

.button-secondary {
  background: var(--white);
  color: var(--black);
}

.button-dark {
  background: var(--ink);
  color: var(--white);
}

.visual-card,
.product-art {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  box-shadow: 0 22px 54px rgba(5, 5, 5, 0.08);
}

.section-block {
  display: grid;
  gap: 34px;
}

.section-heading {
  max-width: 760px;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.solution-card,
.case-grid article {
  min-height: 245px;
  padding: 22px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  background: var(--white);
}

.solution-card:hover {
  border-color: var(--black);
}

.card-icon {
  display: inline-flex;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  border-radius: 50%;
  background: var(--yellow);
  color: var(--black);
}

.card-icon svg {
  width: 27px;
  height: 27px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.card-icon svg * {
  fill: none;
}

.solution-card p,
.case-grid p {
  color: var(--gray-700);
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(320px, 0.8fr);
  gap: clamp(34px, 6vw, 72px);
  align-items: center;
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(60px, 8vw, 104px) clamp(18px, 4vw, 28px);
  border-top: 1px solid var(--gray-200);
}

.check-list {
  display: grid;
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  padding: 14px 16px;
  border-left: 5px solid var(--yellow);
  background: var(--gray-100);
  font-weight: 700;
}

.visual-card {
  overflow: hidden;
  background: var(--white);
  color: var(--black);
}

.status-line {
  margin: 0;
  padding: 18px;
  background: var(--yellow);
  color: var(--black);
}

.status-line strong,
.status-line small {
  display: block;
}

.product-feature {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
  gap: clamp(30px, 5vw, 64px);
  align-items: center;
  background: var(--white);
  max-width: none;
  padding-left: max(clamp(18px, 4vw, 28px), calc((100vw - var(--max)) / 2 + 28px));
  padding-right: max(clamp(18px, 4vw, 28px), calc((100vw - var(--max)) / 2 + 28px));
}

.product-copy {
  max-width: 690px;
}

.feature-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 30px;
}

.feature-list span {
  padding: 9px 12px;
  border: 1px solid var(--black);
  border-radius: 99px;
  background: var(--white);
  font-size: 0.92rem;
  font-weight: 800;
}

.product-art {
  overflow: hidden;
  background: var(--white);
}

.visual-card img,
.product-art img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.case-grid article {
  background: var(--white);
}

.case-grid span {
  display: inline-block;
  margin-bottom: 20px;
  padding: 7px 10px;
  border-radius: 99px;
  background: var(--yellow);
  color: var(--black);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.case-grid h3 {
  color: var(--black);
}

.case-grid p {
  color: var(--gray-700);
}

.final-cta {
  justify-content: space-between;
  padding: clamp(44px, 6vw, 72px) max(clamp(18px, 4vw, 28px), calc((100vw - var(--max)) / 2 + 28px));
  background: var(--yellow);
  border-top: 1px solid rgba(5, 5, 5, 0.14);
  border-bottom: 1px solid rgba(5, 5, 5, 0.14);
}

.final-cta div {
  max-width: 760px;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(340px, 1fr);
  gap: clamp(30px, 6vw, 72px);
  align-items: start;
}

.contact-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 18px 46px rgba(5, 5, 5, 0.06);
}

.contact-form label {
  display: grid;
  gap: 7px;
  color: var(--gray-900);
  font-size: 0.94rem;
  font-weight: 700;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  min-height: 48px;
  padding: 12px 13px;
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  font: inherit;
  background: var(--white);
  color: var(--ink);
  transition: border-color 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: rgba(5, 5, 5, 0.32);
  box-shadow: 0 0 0 4px rgba(255, 212, 0, 0.22);
  outline: none;
}

.contact-form textarea {
  resize: vertical;
}

.privacy {
  margin: 0;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--gray-100);
  color: var(--gray-700);
  font-size: 0.9rem;
}

.contact-form button:disabled {
  cursor: wait;
  opacity: 0.72;
  transform: none;
}

.full {
  grid-column: 1 / -1;
}

.form-feedback {
  grid-column: 1 / -1;
  display: none;
  margin: 0;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 700;
}

.form-feedback.success,
.form-feedback.error {
  display: block;
}

.form-feedback.success {
  border: 1px solid #b8e8cc;
  background: #ecfff3;
  color: #15683a;
}

.form-feedback.error {
  border: 1px solid #f0c1c1;
  background: #fff1f1;
  color: #9f2727;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 28px clamp(18px, 4vw, 48px);
  background-color: #ffd400;
  color: var(--black);
  border-top: 1px solid rgba(5, 5, 5, 0.14);
}

.site-footer img {
  width: 190px;
  height: auto;
  aspect-ratio: 250 / 80;
  object-fit: contain;
  background-color: #ffd400;
}

.site-footer p {
  margin: 0;
  color: var(--black);
  font-weight: 700;
}

.site-footer a {
  color: var(--black);
  font-weight: 900;
}

@media (max-width: 920px) {
  .nav-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: 100%;
    right: 18px;
    left: 18px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    background: var(--white);
    box-shadow: 0 18px 42px rgba(5, 5, 5, 0.12);
  }

  .main-nav.is-open {
    display: flex;
  }

  .hero,
  .split-section,
  .product-feature,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    background-image:
      linear-gradient(90deg, rgba(242, 243, 245, 0.98) 0%, rgba(242, 243, 245, 0.88) 100%),
      url("assets/hero-notebook.png");
    background-position: 62% center;
  }

  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .case-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .site-header {
    padding: 12px 16px;
  }

  .brand img {
    width: 168px;
  }


  .cards-grid,
  .case-grid,
  .contact-form {
    grid-template-columns: 1fr;
  }

  .full {
    grid-column: auto;
  }

  .visual-card img,
  .product-art img {
    min-height: 260px;
  }

  .site-footer,
  .final-cta {
    align-items: flex-start;
    flex-direction: column;
  }
}