/* ANCHOR - Fonts */
@font-face {
  font-family: "IBM";
  src: url(../fonts/IBMPlexMono-Regular.woff2) format(woff2),
      url(../fonts/IBMPlexMono-Regular.woff) format(woff);
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "IBM";
  src: url(../fonts/IBMPlexMono-Italic.woff2) format(woff2),
      url(../fonts/IBMPlexMono-Italic.woff) format(woff);
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

@font-face {
  font-family: "IBM";
  src: url(../fonts/IBMPlexMono-ExtraLight.woff2) format(woff2),
      url(../fonts/IBMPlexMono-ExtraLight.woff) format(woff);
  font-weight: 200;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "IBM";
  src: url(../fonts/IBMPlexMono-ExtraLightItalic.woff2) format(woff2),
      url(../fonts/IBMPlexMono-ExtraLightItalic.woff) format(woff);
  font-weight: 200;
  font-style: italic;
  font-display: swap;
}

/* ANCHOR - Custom Properties */
:root {
  --color-black: #000000;
  --color-white: #e1e1e1;
  --color-grey: #9f9d9d;
  --color-green: #54b254;
  --color-red: #fc1a52;
  --color-purple: #ef08ff;
  --color-yellow: #c1de04;
  --color-blue: #03bfee;

  --color-primary: var(--color-blue);
  --color-accent: var(--color-purple);

  --font-main: "IBM", monospace;
  --font-content: system-ui, -apple-system, sans-serif;
  --line-height: 1.6;
  --font-size: calc(1rem + 0.4vw);
}

body.invert {
  --color-black: #e1e1e1;
  --color-white: #000000;
  --color-grey: #4f4f4f;
  --color-green: #126133;
  --color-red: #a60f35;
  --color-purple: #8002b7;
  --color-yellow: #e37e02;
  --color-blue: #0856af;
}

/* ANCHOR - Main Style */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-main);
  font-weight: 400;
  font-size: var(--font-size);
  line-height: var(--line-height);
  color: var(--color-white);
  background-color: var(--color-black);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header, main, footer {
  width: 100%;
  max-width: 1260px;
  margin: 0 auto;
  padding: 1.5rem;
}

main {
  flex: 1;
}

/* ANCHOR - Typography */
h1, h2, h3 {
  color: var(--color-primary);
  font-weight: 200;
  margin: 1.5rem 0 1rem;
}

h1 {
  font-size: calc(2rem + var(--font-size));
}

h2 {
  font-size: calc(1.5rem + var(--font-size));
}

p, li {
  font-family: var(--font-content);
  margin-bottom: 1rem;
  max-width: 65ch;
}

a {
  text-decoration: none;
  transition: all 0.2s ease;
}

/* ANCHOR - Layout Components */
.flex-container {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.content-block {
  text-align: justify;
  text-align-last: left;
  hyphens: auto;
  margin-bottom: 2rem;
}

.highlight-box {
  border-left: 3px solid var(--color-green);
  padding: 0.5rem 1rem;
  margin: 1.5rem 0;
  background: rgba(3, 191, 238, 0.05);
}

.specs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 10%;
  margin: 2rem 0;
}

.tech-list {
  list-style: none;
  padding: 0;
}

.tech-list li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.5rem;
}

.tech-list li::before {
  content: "▹";
  position: absolute;
  left: 0;
  color: var(--color-green);
}

/* ANCHOR - Navigation */
nav ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ANCHOR - Link Colors */
.link-blue, .link-purple, .link-green, .link-grey, .link-white, .link-red {
  cursor: pointer;
  padding: 0.25rem 0.5rem;
}

.link-red { color: var(--color-red) }
.link-red:hover { color: var(--color-black); background: var(--color-red); }

.link-white { color: var(--color-white) }
.link-white:hover { color: var(--color-black); background: var(--color-white); }

.link-grey { color: var(--color-grey) }
.link-grey:hover { color: var(--color-black); background: var(--color-grey); }

.link-green { color: var(--color-green) }
.link-green:hover { color: var(--color-black); background: var(--color-green); }

.link-purple { color: var(--color-purple) }
.link-purple:hover { color: var(--color-black); background: var(--color-purple); }

.link-blue { color: var(--color-blue) }
.link-blue:hover { color: var(--color-black); background: var(--color-blue); }

/* ANCHOR - Text Colors */
.text-black { color: var(--color-black); }
.text-white { color: var(--color-white); }
.text-yellow { color: var(--color-yellow); }
.text-gray { color: var(--color-grey); }
.text-green { color: var(--color-green); }
.text-purple { color: var(--color-purple); }
.text-blue { color: var(--color-blue); }
.text-accent { color: var(--color-accent); font-weight: bold; }

/* ANCHOR - Header & Footer */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--color-grey);
  padding-top: 1rem;
  padding-bottom: 1rem;
}

#page-logo {
  font-style: italic;
  font-weight: 200;
  font-size: 1.2rem;
}

footer {
  border-top: 1px solid var(--color-grey);
  margin-top: 2rem;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
  text-align: center;
}

footer ul {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ANCHOR - Accessibility */
a:focus, button:focus {
  outline: 2px solid var(--color-yellow);
  outline-offset: 2px;
}

/* ANCHOR - Responsive Adjustments */
@media (max-width: 768px) {
  header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  nav ul {
    margin-top: 0.5rem;
  }

  .specs-grid {
    grid-template-columns: 1fr;
  }
}