:root {
  --bg-primary: #3A55C4;
  --bg-primaryDark: #111B43;
  --primary-orange: #db6b3b;
  --product-whoami: #83243A;
  --product-aicluster: #242331;
  --white: #ffffff;
  --black: #000000;

  --space-xs: 0.4rem;
  /* 4px */
  --space-sm: 0.8rem;
  /* 8px */
  --space-md: 1.6rem;
  /* 16px */
  --space-lg: 2.4rem;
  /* 24px */
  --space-xl: 4.2rem;
  /* 42px */
  --space-2xl: 6.4rem;
  /* 64px */
}

/** breakpoints: 1440, 1024, 768, 480 */
/** minimum: 320 */

/** common */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Coiny', serif;
  color: var(--white)
}

html {
  font-size: 62.5%;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  background-color: var(--bg-primary);
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

main {
  display: flex;
  flex-direction: column;
}

button,
a,
input,
textarea,
select,
img {
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  outline: none;
}

img {
  max-width: 100%;
  user-select: none;
}

@media (max-width: 1024px) {
  html {
    font-size: 56.25%;
    /** 1rem = 9px */
  }
}

@media (max-width: 768px) {
  html {
    font-size: 50%;
    /** 1rem = 8px */
  }
}

@media (max-width: 480px) {
  html {
    font-size: 43.75%;
    /** 1rem = 7px */
  }
}

/** =========== HEADER SECTION =========== */

.header {
  min-height: calc(100vh + var(--space-sm));
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(to bottom, var(--bg-primary) 00%, var(--bg-primaryDark) 100%);
  padding: var(--space-md) var(--space-lg);
  gap: 2rem;
  position: relative;
}

.header-content {
  flex: 0 0 55%;
  display: flex;
  flex-direction: column;
}

.header-image {
  flex: 0 0 45%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.logo {
  width: 16rem;
  height: 16rem;
  object-fit: contain;
  margin-bottom: var(--space-lg);
}

.main-title {
  font-size: 6rem;
  margin-bottom: var(--space-sm);
}

.main-subtitle {
  font-size: 4rem;
  margin-bottom: var(--space-md);
}

.main-subtitle-highlight {
  color: var(--primary-orange)
}

.main-description {
  font-size: 2.4rem;
}

.macbook {
  width: 100%;
  height: auto;
  object-fit: contain;
  object-fit: contain;
}

@media (max-width: 1440px) {
  .header-content {
    flex: 0 0 60%;
  }

  .header-image {
    flex: 0 0 40%;
  }
}

@media (max-width: 1024px) {
  .header-content {
    flex: 0 0 100%;
  }

  .header-image {
    display: none;
  }
}

@media (max-width: 768px) {
  .header-image {
    width: 55%;
    top: var(--space-xl);
    right: var(--space-xl);
  }
}

/** sections common */

h2 {
  font-size: 6rem;
  margin-bottom: var(--space-xl);
  text-align: center;
}

section,
footer {
  display: flex;
  flex-direction: column;
  padding: var(--space-2xl) var(--space-lg);
}

/** =========== PHILOSOPHY SECTION =========== */

.section-philosophy {
  align-items: center;
  background: linear-gradient(to bottom, var(--bg-primaryDark) 50%, var(--bg-primaryDark) 100%);
}

.philosophy-items {
  display: flex;
  gap: var(--space-md);
}

.philosophy-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  text-align: center;
}

.philosophy-icon {
  width: 20rem;
  height: 20rem;
  object-fit: contain;
  margin-bottom: var(--space-sm);
}

.philosophy-item-texts {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.philosophy-title {
  font-size: 4.2rem;
  color: var(--primary-orange);
}

.philosophy-description {
  font-size: 2.2rem;
}

@media (max-width: 1024px) {
  .philosophy-items {
    flex-direction: column;
  }

  .philosophy-item {
    flex-direction: row;
    text-align: left;
    gap: var(--space-xl);
  }
}

@media (max-width: 480px) {
  .philosophy-item {
    flex-direction: column;
    text-align: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-2xl);
  }
}

/** =========== PRODUCTS SECTION =========== */

.section-products {
  align-items: center;
  padding: 0;
}

.product-container {
  display: flex;
  width: 100%;
  flex-direction: column;
  align-items: center;
  padding: var(--space-2xl) var(--space-lg);
  background: linear-gradient(to bottom, var(--bg-primaryDark) 0%, var(--product-whoami) 50%, var(--product-whoami) 100%);
}

.product-container-aicluster {
  background: linear-gradient(to bottom, var(--product-whoami) 0%, var(--product-aicluster) 40%, var(--product-aicluster) 100%);
}

.product-content {
  display: flex;
  align-items: center;
  width: 100%;
  max-width: 1440px;
  gap: var(--space-2xl);
  margin-top: var(--space-2xl);
}

.product-icon {
  width: 40rem;
  height: 40rem;
  object-fit: contain;
  border: 0.8rem solid var(--white);
  border-radius: 40rem;
}

.product-name {
  font-size: 5.4rem;
}

.product-subtitle {
  font-size: 4rem;
  margin-bottom: var(--space-lg);
}

.product-description {
  font-size: 2.8rem;
  margin-bottom: var(--space-lg);
}

.learn-more-button {
  display: inline-block;
  background-color: var(--primary-orange);
  padding: var(--space-md) var(--space-xl);
  border: none;
  text-decoration: none;
  font-size: 3rem;
  border-radius: 10rem;
}

.learn-more-button:hover {
  filter: brightness(1.08);
}

@media (max-width: 768px) {
  .product-content {
    flex-direction: column;
  }

  .product-icon {
    width: 24rem;
    height: 24rem;
  }

  .product-texts {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

}

/** footer */

.footer {
  align-items: center;
  background: linear-gradient(to bottom, var(--product-aicluster) 0%, var(--bg-primary) 100%);
  padding-bottom: var(--space-md);
}

.info {
  font-size: 3rem;
  text-align: center;
  margin-bottom: var(--space-lg);
}

.contacts-content {
  width: 90%;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-lg);
  margin: var(--space-lg) 0 var(--space-xl);
}

.contact-item {
  display: flex;
  flex: 1;
  max-width: 33%;
  flex-direction: column;
  align-items: center;
  text-align: center;
  font-size: 2rem;
  gap: var(--space-xs);
}

.contact-title {
  font-size: 2.8rem;
}

.copyrights {
  font-size: 1.6rem;
  font-style: italic;
}

@media (max-width: 1024px) {
  .contacts-content {
    flex-direction: column;
    gap: var(--space-xl);
  }

  .contact-item {
    font-size: 2.4rem;
    max-width: 100%;
  }
}