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

:root {
  --color-primary:      #33BDBA;
  --color-primary-dark: #028388;
  --color-bg:           #EDEEEE;
  --color-surface:      #FFFFFF;
  --color-text:         #494D4F;
  --color-text-muted:   #5A6170;

  --font: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;

  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.25rem;
  --text-xl:   1.563rem;
  --text-2xl:  1.953rem;
}

body {
  font-family: var(--font);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);

  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  background-image: url('../assets/Berlin.jpg');
  background-size: cover;
  background-position: center;
  background-color: #001F3F;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

body [hidden] {
  display: none;
}

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

.skip-link {
  position: absolute;
  top: 0;
  left: 0;
  transform: translateY(-100%);
  background: var(--color-primary);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 9999;
  text-decoration: none;
  font-size: var(--text-sm);
  
  &:focus {
    transform: translateY(0);
  }
}

nav {
    width: 100%;
    padding: 1.3rem 3rem;
    padding-left: calc(3rem + 140px + 25px);
    background-color: var(--color-bg);
    position: absolute;
    top: 0;
    left: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    padding: 0.2rem 0.5rem;
    width: 100px;
    border-radius: 0.3rem;
    text-align: center;
    color: var(--color-text);
    border: 1px solid var(--color-text-muted);
    outline: none;
    cursor: pointer;
}

.logo {
  position: absolute;
  top: 0;
  left: 3rem;
  width: 140px;
  max-width: 40vw;
  height: auto;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;

  a {
    text-decoration: none;
    color: var(--color-text);

    &:hover,
    &:focus {
      text-decoration: underline;
    }
  }
}

main {
    padding: 3rem 4rem;
    background-color: var(--color-surface);
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    max-width: 800px;
    display: flex;
    flex-direction: column;
    align-items: center;

    h1 {
        margin-bottom: 1rem;
    }
    p {
        max-width: 500px;
        text-align: center;
    }
    .portal-links {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 1rem;
        margin-top: 2rem;
        min-width: 300px;

        a {
            width: 100%;
            text-align: center;
            text-decoration: none;
            color: var(--color-text);
            padding: 1rem 2rem;
            border: 1px solid var(--color-text-muted);
            border-radius: 0.5rem;

            &:hover,
            &:focus {
                border: 1px solid var(--color-primary);
                color: var(--color-primary);
                text-decoration: underline;
            }
        }
    }
}