:root {
  --color-primary: #0065ff;
  --color-primary-hover: rgba(0, 101, 255, 0.6);
  --color-secondary: #202020;
  --color-secondary-hover: rgba(32, 32, 32, 0.6);
  --surface-primary: #ffffff;
  --surface-secondary: #f8f9fa;
  --color-shadow: rgba(0, 0, 0, 0.15);
}

:root.dark {
  --color-primary: #faf4e6;
  --color-primary-hover: rgba(250, 244, 230, 0.6);
  --color-secondary: #faf4e6;
  --color-secondary-hover: rgba(250, 244, 230, 0.6);
  --surface-primary: #222222;
  --surface-secondary: #3c3b3a;
  --color-shadow: rgba(65, 65, 65, 0.85);
}

/* Page Reset Styles */
* {
  border: 0;
  margin: 0;
  padding: 0;
  text-decoration: none;
  box-sizing: border-box;
  color: inherit;

  transition: background-color 0.2s ease-in-out;
}

/* Page base styles */
:root {
  font-family: "Be Vietnam", sans-serif;
  font-style: normal;
  font-size: 62.5%;
}

hr {
  width: 100%;
  height: 1px;
  background-color: var(--color-primary);
}

p,
label,
main section form input,
main section form textarea,
main section form input::placeholder,
main section form textarea::placeholder {
  font-weight: 400;
  font-size: 1.7rem;
  line-height: 2.5rem;
  text-align: justify;
  color: var(--color-secondary);
}

input,
textarea {
  width: 100%;
  background: var(--surface-primary);
  border: 1px solid var(--color-primary-hover);
  border-radius: 5px;

  padding: 8px;
}

button {
  max-width: 310px;
  width: 100%;
  padding: 16px 30px;

  background: var(--surface-primary);
  border: 1px solid var(--color-primary);
  border-radius: 44.5px;

  font-weight: 700;
  font-size: 1.2rem;
  line-height: 1.8rem;
  color: var(--color-primary);

  cursor: pointer;
}
button:hover {
  background: var(--surface-secondary);
  color: var(--color-primary-hover);
}

body main a {
  color: var(--color-primary);
  font-weight: 400;
  cursor: pointer;
}
:root.dark body main a {
  text-decoration: underline;
}
body main a:hover {
  color: var(--color-primary-hover);
}

body {
  background-color: var(--surface-primary);
}

main {
  max-width: 960px;
  min-width: 310px;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

section,
section header,
section main {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 25px;
}

section header h2 {
  font-weight: 700;
  font-size: 2.4rem;
  line-height: 100%;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}

@media screen and (min-width: 790px) {
  button {
    width: fit-content;
  }
  section header {
    align-self: flex-start;
    align-items: flex-start;
  }
}