:root {
  color-scheme: dark;

  --black: #000000;
  --white: #ffffff;
  --gray: #c0c0c0;
  --dark-gray: #202020;
  --blue: #0000aa;
  --cyan: #00ffff;
  --green: #b6ff00;
  --magenta: #ff00ff;
  --yellow: #ffff00;
}

/*
  =========================================================
  BASE
  =========================================================
*/

* {
  box-sizing: border-box;
}

html {
  background: var(--black);
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;

  color: var(--white);

  background:
    repeating-linear-gradient(
      0deg,
      #000000 0,
      #000000 3px,
      #080808 4px
    );

  /*
    No external font request is required.
  */

  font-family:
    "Courier New",
    Courier,
    monospace;

  line-height: 1.5;
}

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

a:visited {
  color: var(--magenta);
}

button,
input,
output {
  font: inherit;
}

button {
  cursor: pointer;
}

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

:focus-visible {
  outline: 3px solid var(--yellow);
  outline-offset: 4px;
  box-shadow: 0 0 0 6px var(--blue);
}

/*
  =========================================================
  ACCESSIBILITY
  =========================================================
*/

.skip-link {
  position: fixed;
  z-index: 999;
  top: 10px;
  left: 10px;

  padding: 10px;

  color: var(--black);
  background: var(--yellow);

  transform: translateY(-200%);
}

.skip-link:focus {
  transform: translateY(0);
}

/*
  =========================================================
  SITE HEADER
  =========================================================
*/

.site-header {
  padding: 20px;

  border: 5px ridge var(--gray);
  background: var(--black);
}

.system-message {
  display: inline-block;

  margin: 0 0 10px;
  padding: 4px 8px;

  color: var(--black);
  background: var(--green);

  font-weight: bold;
}

.site-header h1 {
  margin: 0;

  color: var(--yellow);

  font-size: clamp(2rem, 6vw, 5.5rem);
  line-height: 0.9;

  overflow-wrap: anywhere;

  text-shadow:
    4px 4px 0 var(--blue),
    -2px -2px 0 var(--magenta);
}

.site-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;

  margin-top: 22px;
}

.site-header nav a,
.button-row button {
  padding: 8px 12px;

  color: var(--black);
  background: var(--gray);

  border: 3px outset var(--white);

  font-weight: bold;
  text-decoration: none;
}

.site-header nav a:active,
.button-row button:active {
  border-style: inset;
}

/*
  =========================================================
  CONTROL PANEL
  =========================================================
*/

.control-panel {
  margin: 10px;

  border: 5px ridge var(--gray);
  background: var(--black);
}

.window-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;

  min-width: 0;
  padding: 7px 9px;

  color: var(--white);
  background: var(--blue);

  font-weight: bold;
}

.window-bar h2,
.window-bar span {
  min-width: 0;
  margin: 0;

  font-size: 0.85rem;
  overflow-wrap: anywhere;
}

#status {
  text-align: right;
}

.controls-grid {
  display: grid;

  /*
    This accommodates the original controls and the new
    PV voltage, PV current, and update-time boxes.
  */

  grid-template-columns:
    repeat(
      auto-fit,
      minmax(180px, 1fr)
    );
}

.controls-grid label,
.location-box {
  display: flex;
  flex-direction: column;
  gap: 8px;

  min-width: 0;
  padding: 12px;

  color: var(--yellow);

  border-right: 1px solid var(--green);
  border-bottom: 1px solid var(--green);

  font-size: 0.72rem;
  font-weight: bold;
}

.controls-grid output,
.location-box strong {
  min-width: 0;

  color: var(--white);

  font-weight: bold;
  overflow-wrap: anywhere;
}

#updated-at-output {
  font-size: 0.66rem;
  line-height: 1.35;
}

.controls-grid input {
  width: 100%;
  accent-color: var(--green);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;

  padding: 12px;
}

.energy-note {
  margin: 0;
  padding: 0 12px 12px;

  color: var(--green);

  font-size: 0.72rem;
}

/*
  =========================================================
  INTRODUCTION
  =========================================================
*/

.introduction {
  min-height: 72vh;
  margin: 10px;
  padding: clamp(30px, 7vw, 100px);

  border: 4px double var(--cyan);

  background:
    repeating-linear-gradient(
      45deg,
      rgba(0, 255, 255, 0.05) 0,
      rgba(0, 255, 255, 0.05) 12px,
      rgba(255, 0, 255, 0.05) 12px,
      rgba(255, 0, 255, 0.05) 24px
    ),
    var(--black);
}

.green-text {
  color: var(--green);

  font-weight: bold;
}

.introduction h2 {
  margin: 25px 0;

  font-size: clamp(2rem, 7vw, 6rem);
  line-height: 0.92;

  overflow-wrap: anywhere;

  text-shadow:
    4px 4px 0 var(--magenta),
    8px 8px 0 var(--blue);
}

.inset-box {
  max-width: 760px;
  padding: 16px;

  color: var(--black);
  background: var(--gray);

  border: 4px inset var(--white);
}

/*
  =========================================================
  PROJECTS
  =========================================================
*/

.project {
  display: grid;

  grid-template-columns:
    minmax(0, 1.25fr)
    minmax(280px, 0.75fr);

  gap: 20px;

  min-height: 100vh;
  margin: 10px;
  padding: clamp(18px, 4vw, 50px);

  background: rgba(0, 0, 0, 0.96);
}

.cyan-border {
  border: 5px ridge var(--cyan);
}

.green-border {
  border: 5px ridge var(--green);
}

.magenta-border {
  border: 5px ridge var(--magenta);
}

.project-header {
  grid-column: 1 / -1;
  min-width: 0;
}

.project-header span {
  color: var(--green);
}

.project-header h2 {
  margin: 5px 0 0;

  color: var(--yellow);

  font-size: clamp(2.6rem, 7vw, 6rem);
  line-height: 0.9;

  overflow-wrap: anywhere;

  text-shadow:
    3px 3px 0 var(--blue);
}

/*
  =========================================================
  IMAGE WINDOWS
  =========================================================
*/

.image-window {
  align-self: start;
  min-width: 0;
  margin: 0;

  border: 5px outset var(--gray);
  background: var(--gray);
}

.canvas-container {
  display: grid;
  place-items: center;

  min-height: 300px;
  overflow: hidden;

  background: var(--black);
}

.canvas-container canvas {
  display: block;
  height: auto;

  image-rendering: pixelated;
}

/*
  Portrait images remain slightly smaller inside their windows.
*/

#canvas-01,
#canvas-03 {
  width: 60%;
  max-width: 480px;
}

/*
  Landscape image fills the available width.
*/

#canvas-02 {
  width: 100%;
  max-width: 100%;
}

.image-window figcaption {
  padding: 10px;

  color: var(--black);
  background: var(--gray);

  border-top: 2px solid var(--white);

  font-size: 0.75rem;
}

/*
  =========================================================
  PROJECT TEXT
  =========================================================
*/

.project-text {
  align-self: start;
  min-width: 0;
  padding: 18px;

  border: 3px dashed var(--yellow);
  background: var(--black);
}

.project-text pre {
  max-width: 100%;
  overflow-x: auto;
  padding: 12px;

  color: var(--green);
  background: var(--dark-gray);

  border: 2px solid var(--green);

  font: inherit;
  font-size: 0.8rem;
  white-space: pre-wrap;
}

/*
  =========================================================
  FOOTER
  =========================================================
*/

.site-footer {
  margin: 10px;
  padding: 20px;

  border: 5px ridge var(--gray);
  background: var(--black);

  color: var(--green);
  text-align: center;
}

.noscript-message {
  padding: 15px;

  color: var(--black);
  background: var(--yellow);
}

/*
  =========================================================
  RESPONSIVE LAYOUT
  =========================================================
*/

@media (max-width: 900px) {
  .project {
    grid-template-columns: 1fr;
  }

  .project-header {
    grid-column: auto;
  }

  .canvas-container {
    min-height: 220px;
  }
}

@media (max-width: 560px) {
  .controls-grid {
    grid-template-columns: 1fr;
  }

  .project,
  .control-panel,
  .introduction,
  .site-footer {
    margin: 6px;
  }

  .project {
    padding: 12px;
  }

  .canvas-container {
    min-height: 160px;
  }

  #canvas-01,
  #canvas-03 {
    width: 72%;
  }

  .window-bar {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  #status {
    text-align: left;
  }
}

/*
  =========================================================
  REDUCED MOTION
  =========================================================
*/

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}