@import url("https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;600;700&display=swap");

:root {
  /* Schrift */
  --font-family-base: "Open Sans", Arial, Helvetica, sans-serif;
  --font-size-base: 1.35rem;
  --font-size-h1: 3.5rem;
  --font-size-h2: 2.5rem;
  --font-size-h3: 1.85rem;
  --line-height-base: 1.6;
  --line-height-heading: 1.2;
  --font-weight-base: 600;
  --font-weight-heading: 600;
  --font-weight-bold: 700;

  /* Farben */
  --color-bg: #ffffff;
  --color-text: #000000;
  --color-heading: #008eff;
  --color-primary: #008eff;
  --color-primary-hover: #0076d1;
  --color-button-text: #ffffff;
  --color-cover-blue: #b3ddff;
  --color-cover-gray: #e5e5e5;
  --color-border: #e5e5e5;

  /* Layout */
  --container-width: 1200px;
  --content-padding: 2rem;
  --section-padding-y: 5rem;

  /* Navbar */
  --navbar-height: 90px;
  --navbar-padding-y: 1rem;
  --navbar-padding-x: 2rem;
  --logo-height: 56px;
  --dropdown-min-width: 280px;

  /* Buttons */
  --button-padding-y: 1rem;
  --button-padding-x: 2rem;
  --button-radius: 9999px;

  /* Effekte */
  --transition-fast: 0.2s ease;
}

/* Grundlayout */

* {
  box-sizing: border-box;
}

html {
  font-size: 100%;
}

body {
  margin: 0;
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background: var(--color-bg);
}

main {
  width: 100%;
}

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

/* Text */

h1,
h2,
h3 {
  margin-top: 0;
  line-height: var(--line-height-heading);
  color: var(--color-heading);
  font-weight: var(--font-weight-heading);
}

h1 {
  font-size: var(--font-size-h1);
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

p {
  margin-top: 0;
  margin-bottom: 1.4em;
  font-size: var(--font-size-base);
}

.text-heading {
  margin-top: 0;
  margin-bottom: 0.4em;
  font-weight: var(--font-weight-bold);
}

li,
td,
th,
input,
textarea,
select,
button {
  font-size: var(--font-size-base);
}

a {
  color: var(--color-text);
  text-decoration: underline;
}

/* Buttons */

button,
.button {
  display: inline-block;
  padding: var(--button-padding-y) var(--button-padding-x);
  border: none;
  border-radius: var(--button-radius);
  background: var(--color-primary);
  color: var(--color-button-text);
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-base);
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition-fast);
}

button:hover,
.button:hover {
  background: var(--color-primary-hover);
  color: var(--color-button-text);
  text-decoration: none;
}

/* Wiederverwendbare Layout-Klassen */

.container {
  width: min(100% - 2rem, var(--container-width));
  margin-inline: auto;
}

.section {
  padding-block: var(--section-padding-y);
}

.cover-blue {
  background: var(--color-cover-blue);
}

.cover-gray {
  background: var(--color-cover-gray);
}

/* Navbar */

.site-header {
  width: 100%;
  background: var(--color-bg);
  position: relative;
  z-index: 100;
}

.navbar {
  min-height: var(--navbar-height);
  padding: var(--navbar-padding-y) var(--navbar-padding-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.navbar-logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.navbar-logo img {
  height: var(--logo-height);
  width: auto;
}

.navbar-menu {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.navbar-menu > li {
  position: relative;
}

.navbar-menu a,
.navbar-dropdown-label {
  color: var(--color-text);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}

.navbar-dropdown-label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.navbar-dropdown-arrow {
  font-size: 0.8em;
  line-height: 1;
}

.navbar-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: var(--dropdown-min-width);
  margin: 0;
  padding: 1rem 0;
  list-style: none;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  box-shadow: 0 0.75rem 2rem rgba(0, 0, 0, 0.08);
}

.navbar-dropdown:hover .navbar-dropdown-menu,
.navbar-dropdown:focus-within .navbar-dropdown-menu {
  display: block;
}

.navbar-dropdown-menu a {
  display: block;
  padding: 0.5rem 1rem;
}

/* Footer */

.site-footer {
  width: 100%;
  padding: 2rem;
  background: var(--color-bg);
}

.footer-nav {
  display: flex;
  justify-content: center;
  gap: 2rem;
}

.footer-nav a {
  color: var(--color-text);
  text-decoration: none;
}

/* Responsive */

@media (max-width: 900px) {
  .navbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .navbar-menu {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .navbar-dropdown-menu {
    position: static;
    box-shadow: none;
    border: none;
    padding: 0.5rem 0 0.5rem 1rem;
  }

  .footer-nav {
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
  }
}