:root {
  --container-max: 1200px;
  --container-gutter: 2rem;

  --color-bg: #fff;
  --color-bg-2: #f4f4f4;
  --color-text: #444;
  --color-accent: #b38405;
  --color-dark-bg: #3d3e40;
  --color-dark-text: #f0f0f0;
  --color-dark-accent: #f6c73c;
  --header-gradient: radial-gradient(circle, #55575a 5%, #3d3e40 50%);

  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 1rem;     /* 16px - body default */
  --text-lg: 1.125rem;   /* 18px */
  --text-xl: 1.25rem;    /* 20px */
  --text-2xl: 1.5rem;    /* 24px */
  --text-3xl: 1.875rem;  /* 30px */
  --text-4xl: 2.25rem;   /* 36px */
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html, body, ol, ul { margin: 0; padding: 0; }
img, picture, video, canvas, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; }

html, body {
  height: 100%;
}

body {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1 0 auto;
  background-color: var(--color-bg);
  color: var(--color-text);
  text-align: left;
}

header, footer {
  flex-shrink: 0;
  width: 100%;
  min-height: 10dvh;
  background-color: var(--color-dark-bg);
  color: var(--color-dark-text);
  text-align: center;
}

.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-gutter);
  width: 100%;
}

header {
  background: var(--header-gradient);
  min-height: 15dvh;
  display: flex;
  flex-direction: column;
}

footer {
  background-color: #3d3e40;
}

nav.main-nav {
  margin-top: auto;
  background-color: var(--color-bg-2);
  color: var(--color-text);
  text-align: left;
}

main a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

header a, footer a {
  color: var(--color-dark-accent);
}

nav.main-nav ul {
  display: flex;
  list-style: none;
}

nav.main-nav a {
  color: inherit;
  text-decoration: none;
  display: block;
  padding: 0.75rem 1rem;
}