/*
 * FM-SWITCH's page, in the app's look: a dark handheld-console screen with a green phosphor
 * accent, pixel capitals for headings and a pixel monospace for reading. Kept calm: off-white
 * body text, subtle glow, no scanlines or flicker.
 */

:root {
  --green: #7be39a;
  --dim: rgb(123 227 154 / 50%);
  --faint: rgb(123 227 154 / 20%);
  --bg: #0d100e;
  --surface: #161b18;
  --ink: #e6eadf;
  --muted: #9aa59b;
  --shadow: rgb(0 0 0 / 55%);
  --notch: polygon(
    3px 0, calc(100% - 3px) 0, calc(100% - 3px) 3px, 100% 3px,
    100% calc(100% - 3px), calc(100% - 3px) calc(100% - 3px), calc(100% - 3px) 100%, 3px 100%,
    3px calc(100% - 3px), 0 calc(100% - 3px), 0 3px, 3px 3px
  );

  color-scheme: dark;
}

html {
  background: var(--bg);
}

body {
  margin: 0;
  padding: 0 16px;
  background:
    radial-gradient(ellipse at center, transparent 50%, rgb(0 0 0 / 30%) 100%) fixed,
    radial-gradient(circle, rgb(123 227 154 / 8%) 1px, transparent 1.5px) 0 0 / 12px 12px,
    var(--bg);
  color: var(--ink);
  font: 15px/1.75 "Departure Mono", ui-monospace, monospace;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 40rem;
  margin: 0 auto;
  padding: clamp(2rem, 8vh, 5rem) 0 4rem;
}

a {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px dashed var(--dim);
}

a:hover,
a:focus-visible {
  border-bottom-style: solid;
  border-bottom-color: var(--green);
}

.back {
  display: inline-block;
  margin-bottom: 2.5rem;
  border: 0;
  color: var(--muted);
  font: 12px/1.4 Silkscreen, monospace;
}

.back:hover,
.back:focus-visible {
  color: var(--green);
}

/* The header: the app icon beside the name. */
.masthead {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 1rem;
}

.masthead img {
  flex: none;
  width: 96px;
  height: 96px;
  image-rendering: pixelated;
}

h1 {
  margin: 0;
  color: var(--green);
  font: clamp(2rem, 8vw, 3rem)/1 Silkscreen, monospace;
  text-shadow: 0 0 6px rgb(123 227 154 / 20%);
}

.lede {
  margin: 0.5rem 0 0;
  color: var(--muted);
}

/* Tags: solid for the important one, outlined for the rest. */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 1.5rem 0 3rem;
  padding: 0;
  list-style: none;
}

.tags li {
  padding: 1px 7px;
  outline: 1px solid var(--muted);
  color: var(--muted);
  font: 10px/1.6 Silkscreen, monospace;
}

.tags .solid {
  outline-color: var(--green);
  background: var(--green);
  color: var(--bg);
}

/* Panels: a notched outline, a title tab across the top border and a hard shadow. */
.panel {
  position: relative;
  margin: 0 0 2.25rem;
  filter: drop-shadow(4px 4px 0 var(--shadow));
}

.panel-body {
  padding: 1.5rem 1.25rem 1.1rem;
  border: 2px solid var(--dim);
  background: var(--surface);
  clip-path: var(--notch);
}

.panel h2 {
  position: absolute;
  top: -9px;
  left: 12px;
  z-index: 1;
  margin: 0;
  padding: 1px 7px;
  background: var(--green);
  color: var(--bg);
  font: 11px/1.5 Silkscreen, monospace;
}

.panel p {
  margin: 0 0 1rem;
}

.panel ul {
  margin: 0 0 1rem;
  padding: 0;
  list-style: none;
}

.panel li {
  position: relative;
  padding-left: 1.6em;
  margin-bottom: 0.35rem;
}

.panel li::before {
  content: "\25A0";
  position: absolute;
  left: 0;
  color: var(--green);
  font-size: 0.8em;
  line-height: 2.2;
}

.panel .note {
  color: var(--muted);
}

/* The segmented bar, used here as a divider. */
.meter {
  height: 12px;
  margin: 0 0 2.5rem;
  background: repeating-linear-gradient(to right, var(--faint) 0 9px, transparent 9px 12px);
}

.meter span {
  display: block;
  width: 60%;
  height: 100%;
  background: repeating-linear-gradient(to right, var(--green) 0 9px, transparent 9px 12px);
}

.cursor {
  display: inline-block;
  width: 0.6em;
  height: 1.1em;
  margin-left: 0.2em;
  vertical-align: -0.2em;
  background: var(--green);
  animation: blink 1s steps(1) infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 2px dashed var(--faint);
  color: var(--muted);
  font-size: 13px;
}

footer p {
  margin: 0 0 0.5rem;
}

@media (prefers-reduced-motion: reduce) {
  .cursor {
    animation: none;
  }
}

@media (width <= 480px) {
  .masthead img {
    width: 64px;
    height: 64px;
  }
}