/* Terminal pop-up that comes out of Tux, shared by the home page and the blog. Built by assets/js/terminal.js */

/* Subset of Agave Nerd Font Mono (Latin, blocks, Powerline, Devicons, Font Awesome). Only fetched once the terminal is first opened */
@font-face {
  font-family: "Agave NF";
  src: url("../fonts/AgaveNerdFontMono-subset.woff2") format("woff2");
  font-display: swap;
}

.term {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 500;
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
  width: min(560px, calc(100vw - 16px));
  height: min(400px, 70vh);
  border: 2px solid var(--text-color);
  background: var(--bg-color);
  color: var(--text-color);
  font-family: ui-monospace, "DejaVu Sans Mono", Menlo, Consolas, monospace;
  font-size: 0.8rem;
  line-height: 1.5;
  text-align: left;
  /* terminal.js moves it with the translate property; the pop-in uses the scale property, which is applied after it */
  transform-origin: var(--ox, 50%) var(--oy, 100%);
  /* Closing is a quick fade; only opening grows out of Tux (see termIn) */
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.12s ease-out, visibility 0s linear 0.12s;
}

.term.term-nf {
  font-family: "Agave NF", ui-monospace, "DejaVu Sans Mono", Menlo, Consolas, monospace;
  font-size: 1rem;
}

/* Glyphs only appear with the Nerd Font; without it the plain text stands alone */
.ico {
  display: none;
  width: 1.2ch;
  margin-right: 0.5ch;
  text-align: center;
}

.term-nf .ico {
  display: inline-block;
  font-size: 1.15em;
  vertical-align: -0.08em;
}

.term-nf .nf-off {
  display: none;
}

.term-prompt .ico {
  margin-right: 0;
}

.term.is-open {
  opacity: 1;
  visibility: visible;
  transition-delay: 0s;
  animation: termIn 0.55s cubic-bezier(0.2, 0.8, 0.25, 1);
}

.term.is-party-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

/* Opens like an old CRT: a thin line shoots out of Tux, then opens up (a little too far) and settles */
@keyframes termIn {
  0% {
    scale: 0.25 0.03;
    opacity: 0;
  }
  28% {
    scale: 1.02 0.04;
    opacity: 1;
  }
  72% {
    scale: 1 1.04;
  }
  100% {
    scale: 1 1;
    opacity: 1;
  }
}

.term-line {
  animation: termLine 0.24s steps(4) var(--d, 0ms) backwards;
}

@keyframes termLine {
  from {
    opacity: 0;
    transform: translateX(-8px);
  }
}

.term-bar,
.term-body,
.term-form {
  padding-left: 0.75rem;
  padding-right: 0.75rem;
}

.term-bar {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.45rem;
  padding-bottom: 0.3rem;
}

.term-bar {
  cursor: grab;
  touch-action: none;
  user-select: none;
}

.term-bar.is-dragging {
  cursor: grabbing;
}

.term-title {
  opacity: 0.7;
}

.term-close {
  width: 1.3rem;
  height: 1.3rem;
  padding: 0;
  border: 2px solid currentColor;
  background: transparent;
  color: inherit;
  font: inherit;
  line-height: 1;
  cursor: pointer;
}

.term-close:hover,
.term-close:focus-visible {
  background: var(--text-color);
  color: var(--bg-color);
}

.term-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: var(--text-color) transparent;
}

.term-line {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.term-line a {
  color: inherit;
  text-underline-offset: 3px;
}

.term-dim {
  opacity: 0.7;
}

/* The accent comes from the theme variable, so it follows the wave with its line */
.term-accent {
  color: var(--mascot-accent);
}

.term-art {
  white-space: pre;
  overflow-x: auto;
  margin: 0.3rem 0;
}

/* The activity chart: a gap between squares and tight rows, so each day reads as its own square */
.term-chart {
  line-height: 1.05;
  letter-spacing: 0.22ch;
}

.term-echo {
  margin-top: 0.4rem;
}

.term-form {
  flex: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding-top: 0.35rem;
  padding-bottom: 0.6rem;
}

/* The suggestion sits under the input in the same grid cell, so both share one baseline */
.term-field {
  flex: 1;
  min-width: 0;
  display: grid;
}

.term-ghost {
  grid-area: 1 / 1;
  white-space: pre;
  overflow: hidden;
  opacity: 0.4;
  pointer-events: none;
}

.term-input {
  grid-area: 1 / 1;
  min-width: 0;
  padding: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: inherit;
  caret-color: currentColor;
  font: inherit;
}

/* While the dither wave runs, the pop-up paints its background and border in two layers: the old colours,
   and the new colours clipped to the circle swept so far (the transition scripts set --wave-r/x/y on .term
   every frame, plus --tr-old-* and --tr-new-* on the root) */
body.is-transitioning .term {
  background: transparent;
  border-color: transparent;
}

.term::before,
.term::after {
  content: "";
  display: none;
  position: absolute;
  inset: -2px;
  z-index: -1;
  box-sizing: border-box;
  border: 2px solid;
  pointer-events: none;
}

body.is-transitioning .term::before,
body.is-transitioning .term::after {
  display: block;
}

.term::before {
  background: var(--tr-old-bg);
  border-color: var(--tr-old-fg);
}

.term::after {
  background: var(--tr-new-bg);
  border-color: var(--tr-new-fg);
  clip-path: circle(var(--wave-r, 0px) at var(--wave-x, 0px) var(--wave-y, 0px));
}

@media (max-width: 600px) {
  .term {
    height: min(380px, 60vh);
  }

  /* 16px keeps iOS from zooming the page when the input gets focus */
  .term-input {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .term,
  .term.is-open,
  .term-line {
    transition: none;
    animation: none;
  }
}