/* da colors */
:root {
  --blue: #0000FF;
  --white: #FFFFFF;
}

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

html,
body {
  min-height: 100%;
}

body {
  background: var(--white);
  color: var(--blue);
  font-family: Arial, Helvetica, sans-serif;
  min-height: 100vh;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: url("cbybackground.png") center / cover no-repeat;
  opacity: 0.15;
  z-index: -1;
  pointer-events: none;
}

a {
  color: var(--blue);
}

/* da wrapper */
.page {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  width: 100%;
}

/* da header */
.site-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  padding-top: clamp(15px, 3.75vw, 27px);
}

.logo-link {
  display: block;
}

.logo {
  display: block;
  width: clamp(105px, 22.5vw, 146px);
  height: auto;
}

/* da buttons */
.nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(9px, 3.75vw, 47px);
  width: 100%;
  margin-top: clamp(15px, 3.75vw, 27px);
  padding: 0 16px;
}

.nav-button {
  display: inline-block;
  width: 86px;
  max-width: calc((100vw - 32px - 24px) / 3);
  padding: 7px 0;
  background: var(--blue);
  color: var(--white);
  border: 2px solid var(--blue);
  text-align: center;
  text-decoration: none;
  font-size: clamp(11px, 2.6vw, 13.5px);
  font-weight: bold;
  text-transform: uppercase;
  transition: background 0.15s, color 0.15s;
}

.nav-button:hover,
.nav-button:focus-visible {
  background: var(--white);
  color: var(--blue);
  outline: none;
}

/* da content */
.content {
  width: 100%;
  max-width: 800px;
  padding: clamp(20px, 5vw, 40px) 16px;
  text-align: center;
}

.content p {
  font-size: clamp(14px, 2.2vw, 17px);
  line-height: 1.6;
  margin-bottom: 1em;
}

/* da big button */
.nav-button.nav-button--big {
  width: 129px;
  max-width: calc((100vw - 32px - 24px) / 2.5);
  padding: 11px 0;
  font-size: clamp(14px, 3.5vw, 20px);
}

/* da popup */
button.nav-button {
  font-family: inherit;
  cursor: pointer;
}

.nav-button {
  line-height: 1.2;
}

.popup {
  margin: auto;
  padding: clamp(24px, 6vw, 40px) clamp(24px, 8vw, 56px);
  width: min(400px, calc(100vw - 32px));
  background: var(--white);
  color: var(--blue);
  border: 3px solid var(--blue);
  text-align: center;
}

.popup::backdrop {
  background: rgba(0, 0, 255, 0.15);
}

.popup-text {
  font-size: clamp(22px, 6vw, 30px);
  font-weight: bold;
  margin-bottom: 20px;
}

/* da text backgrounds (white box behind text so it's readable over the drawing) */
.content h1,
.content h2,
.content h3,
.content h4,
.content h5,
.content h6,
.content p,
.content li {
  width: fit-content;
  max-width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding: 4px 10px;
  background: var(--white);
}

.content h1,
.content h2,
.content h3 {
  margin-bottom: 8px;
}