/* GENERAL */

@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600&display=swap");

:root {
  --color-background: #fff;
  --color-text-primary: #000;
  --color-text-secondary: #696969;

  --color-card-background: #fff;
  --color-footer-background: #dbdbdb;

  --gradient-background: linear-gradient(to right, #6f9eda, #9f67d0);

  --icon-tint: brightness(0) invert(1); /* makes it white */

  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;

  --icon-white-display: inline-block;
  --icon-black-display: none;

  --text-size-d1: 3.5625rem; /* 57sp -> 57px */
  --text-size-d2: 2.8125rem; /* 45sp -> 45px */
  --text-size-d3: 2.25rem; /* 36sp -> 36px */
  --text-size-h1: 1.75rem; /* 28sp -> 28px */
  --text-size-h2: 1.5rem; /* 24sp -> 24px */
  --text-size-h3: 1.375rem; /* 22sp -> 22px */
  --text-size-b1: 1.25rem; /* 20sp -> 20px */
  --text-size-b2: 1.125rem; /* 18sp -> 18px */
  --text-size-b3: 1rem; /* 16sp -> 16px */
  --text-size-c1: 0.875rem; /* 14sp -> 14px */
  --text-size-c2: 0.75rem; /* 12sp -> 12px */
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #121212;
    --color-text-primary: #ffffff;
    --color-text-secondary: #9c9c9c;

    --color-card-background: #fff;
    --color-footer-background: #1b1b1b;

    --icon-tint: brightness(0) saturate(100%); /* makes it black */

    --icon-white-display: none;
    --icon-black-display: inline-block;
  }
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: "Poppins", sans-serif;
  background-color: var(--color-background);
  color: var(--color-text-primary);
  transition: background-color var(--transition-normal),
    color var(--transition-normal);
}

/* UTILITY CLASSES */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
}

.icon-white {
  display: var(--icon-white-display);
}
.icon-black {
  display: var(--icon-black-display);
}

/* HEADER - Full Screen Hero Section */
header {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 16px 16px;
}

.logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-bottom: 32px;
}

.logo img {
  width: 140px;
  height: 140px;
  margin-bottom: 16px;
  border-radius: 50%;
}

.logo span {
  font-size: var(--text-size-d2);
  font-weight: bold;
  line-height: 1.2;
}

.tagline {
  font-size: var(--text-size-b1);
  font-weight: normal;
  margin-bottom: 32px;
}

.explore-btn {
  background: var(--gradient-background);
  color: #fff;
  border: none;
  padding: 12px 24px;
  border-radius: 32px;
  min-width: 160px;
  font-weight: bold;
  font-family: "Poppins", sans-serif;
  font-size: var(--text-size-b2);
  cursor: pointer;

  transform-origin: center center;
  transition: transform var(--transition-fast);
}

.explore-btn:hover {
  transform: scale(1.1);
}

.explore-btn:active {
  transform: scale(1);
}

/* EXPLORE SECTION */
#explore {
  background: var(--gradient-background);
  color: #fff;
  padding: 16px 0;
}

#explore h2 {
  font-size: var(--text-size-b1);
  margin-bottom: 32px;
  font-weight: normal;
  text-align: center;
}

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

.app-card {
  background-color: var(--color-card-background);
  width: 100%;
  max-width: 500px;
  border-radius: 24px;
  padding: 16px;
  display: flex;
  flex-direction: row;
  align-items: center;
  text-align: left;
  cursor: pointer;
  transition: transform var(--transition-fast);
  gap: 16px;
}

.app-card:hover {
  transform: scale(1.05);
}

.app-card img {
  width: 64px;
  height: 64px;
  border-radius: 25%;
  flex-shrink: 0;
}

.app-info {
  flex-grow: 1;
}

.app-info h3 {
  font-size: var(--text-size-b1);
  color: #000;
}

.app-info p {
  font-size: var(--text-size-c1);
  color: var(--color-text-secondary);
}

.app-arrow {
  display: none;
  background-color: var(--color-text-primary);
  color: var(--color-background);
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 6.25rem;
  cursor: pointer;
  min-width: 7.5rem;
  transition: transform var(--transition-fast);
  font-weight: 500;
}

.app-arrow:hover {
  transform: scale(1.05);
}

.app-arrow .icon {
  height: 1.25rem;
  width: 1.25rem;
  vertical-align: middle;
}

/* About Section */
#about {
  padding: 16px;
}

#about h2 {
  color: var(--color-text-secondary);
  font-size: var(--text-size-b1);
  margin-bottom: 16px;
  font-weight: normal;
  text-align: center;
}

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

.developer-photo img {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  margin-bottom: 16px;
}

.developer h3 {
  font-size: var(--text-size-h1);
  font-weight: bold;
  margin-bottom: 16px;
}

.developer p {
  font-size: var(--text-size-b3);
  margin-bottom: 10px;
}

.contact-txt {
  color: var(--color-text-secondary);
  margin-top: 32px;
  margin-bottom: 8px;
}

.contact-email {
  margin-bottom: 16px;
  cursor: pointer;
}

.social-button-group {
  display: flex;
  flex-direction: row;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

.social-link {
  background-color: var(--color-text-primary);
  width: 48px;
  height: 48px;
  border-radius: 12px;
  padding: 8px;
  transition: transform var(--transition-fast);
}

.social-link:hover {
  transform: scale(1.1);
}

.social-icon {
  height: 100%;
  width: 100%;
  padding: 0;
}

/* Footer */
footer {
  background-color: var(--color-footer-background);
  color: var(--color-text-secondary);
  text-align: center;
  padding: 16px;
  margin-top: 64px;
  border-top: 1px solid var(--color-text-secondary);
}

@media (min-width: 768px) {
  .logo img {
    width: 220px;
    height: 220px;
  }

  .logo span {
    font-size: var(--text-size-d1);
  }

  .tagline {
    font-size: var(--text-size-b1);
    margin-bottom: 64px;
  }

  #explore {
    padding: 64px 64px;
  }

  #explore h2 {
    font-size: var(--text-size-h1);
  }

  .apps {
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
    gap: 32px;
    margin: 64px 0px;
  }

  .app-card {
    width: calc(33.333% - 16px);
    min-width: 280px;
    max-width: 300px;
    min-height: 340px;
    flex-direction: column;
    justify-content: top;
    text-align: center;
    border-radius: 24px;
    padding: 32px;
    gap: 32px;
  }

  .app-card img {
    width: 120px;
    height: 120px;
  }

  .app-card img {
    flex-shrink: 0;
  }

  .app-info {
    flex-grow: 0;
  }

  .app-info h3 {
    font-size: var(--text-size-h1);
  }

  .app-info p {
    font-size: var(--text-size-b2);
  }

  .app-arrow {
    display: none;
  }

  #about {
    padding: 64px 64px;
  }

  #about h2 {
    font-size: var(--text-size-h1);
    margin-bottom: 64px;
  }

  .developer {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    text-align: left;
    gap: 64px;
  }

  .developer-photo img {
    width: 280px;
    height: 280px;
    margin: 0 64px;
  }

  .developer h3 {
    text-align: left;
    font-size: var(--text-size-d2);
  }

  .developer p {
    text-align: left;
    font-size: var(--text-size-h3);
  }

  .social-button-group {
    justify-content: left;
  }

  .developer-photo {
    width: 50%;
    display: flex;
    justify-content: right;
  }

  .developer-info {
    width: 50%;
  }
}