/* ============================================================
   Pixelsort Wrapper — Neo-brutalist / Y2K
   Deliberately nothing like the landing page: hard 3px borders,
   offset shadows with no blur, chrome gradients, Verdana. The
   typeface is not a fallback, it is the point: Verdana and
   Trebuchet ARE the 2001 web, and they ship on every machine.
   ============================================================ */

:root {
  --sky:      #a8d8f0;
  --sky-deep: #7cc0e4;
  --panel:    #ffffff;
  --panel-2:  #eaf6ff;
  --ink:      #0a1020;

  --magenta:  #ff2e88;
  --cyan:     #00d9ff;
  --lime:     #b8ff3d;
  --violet:   #7b3ff2;

  --chrome-hi: #ffffff;
  --chrome:    #dfe8ef;
  --chrome-lo: #a3b4c2;

  --face: Verdana, Geneva, "DejaVu Sans", sans-serif;
  --disp: "Trebuchet MS", Verdana, sans-serif;
  --mono: "Courier New", Courier, ui-monospace, monospace;

  --hard: 3px solid var(--ink);
  --pop:  5px 5px 0 var(--ink);
  --pop-sm: 3px 3px 0 var(--ink);
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  /* Not background-attachment: fixed. Fixed sizes the gradient to the viewport,
     which leaves a visible tonal step partway down any page taller than one
     screen. Sizing to the document costs nothing here and never steps. */
  background-color: var(--sky-deep);
  background-image:
    repeating-linear-gradient(115deg, rgba(255,255,255,.28) 0 2px, transparent 2px 9px),
    radial-gradient(140% 90% at 50% -10%, #cfeaf9 0%, var(--sky) 46%, var(--sky-deep) 100%);
  background-repeat: no-repeat;
  color: var(--ink);
  font-family: var(--face);
  font-size: 14px;
  line-height: 1.55;
}

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

/* Author `display` rules beat the UA stylesheet's [hidden] rule regardless of
   specificity, so `img { display: block }` above would un-hide every element
   carrying the hidden attribute. This puts it back. */
[hidden] { display: none !important; }

a { color: #0b3ea8; }
a:hover { color: var(--magenta); }

:focus-visible { outline: 3px solid var(--magenta); outline-offset: 2px; }

.scanlines {
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
  background: repeating-linear-gradient(to bottom, rgba(10,16,32,.045) 0 1px, transparent 1px 3px);
  mix-blend-mode: multiply;
}

/* ---------- Masthead ---------- */

.masthead {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  max-width: 1240px;
  margin: 0 auto;
  padding: 22px 20px 14px;
}

.backlink {
  font-family: var(--mono);
  font-weight: bold;
  font-size: 12px;
  text-decoration: none;
  padding: 7px 12px;
  background: var(--panel);
  border: var(--hard);
  box-shadow: var(--pop-sm);
  color: var(--ink);
}
.backlink:hover { background: var(--lime); color: var(--ink); }

.logo {
  margin: 0;
  font-family: var(--disp);
  font-size: clamp(30px, 7vw, 54px);
  font-weight: bold;
  letter-spacing: -0.02em;
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: 2px;
  flex-wrap: wrap;
}
.logo__word {
  background: linear-gradient(#ffffff 0%, #cfe2ee 42%, #8fa9bb 43%, #ffffff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-stroke: 2px var(--ink);
  paint-order: stroke fill;
  text-shadow: 3px 3px 0 var(--cyan);
}
.logo__word--alt { text-shadow: 3px 3px 0 var(--magenta); }
.logo__tag {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: bold;
  letter-spacing: .1em;
  background: var(--ink);
  color: var(--lime);
  padding: 3px 7px;
  margin-left: 8px;
  align-self: center;
}

/* ---------- Marquee ---------- */

.marquee {
  position: relative;
  z-index: 2;
  overflow: hidden;
  max-width: 1240px;
  margin: 0 auto 22px;
  border-block: var(--hard);
  background: var(--ink);
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: bold;
  letter-spacing: .18em;
  padding: 5px 0;
}
.marquee__track {
  display: flex;
  width: max-content;
  animation: slide 26s linear infinite;
}
.marquee__track span { padding-right: 24px; white-space: nowrap; }
@keyframes slide { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) { .marquee__track { animation: none; } }

/* ---------- Workbench grid ---------- */

.workbench {
  position: relative;
  z-index: 2;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px 40px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 22px;
  align-items: start;
}

.panel {
  background: var(--panel);
  border: var(--hard);
  box-shadow: var(--pop);
  padding: 18px;
}
.panel--drop      { grid-column: 1; }
.panel--controls  { grid-column: 2; }
.panel--previews  { grid-column: 3; }
.panel--run       { grid-column: 1 / -1; background: var(--panel-2); }

/* Layered-panel cue: each column sits at a slightly different tilt. */
.panel--drop     { transform: rotate(-.5deg); }
.panel--previews { transform: rotate(.4deg); }

.panel__title {
  margin: -18px -18px 18px;
  padding: 9px 14px;
  font-family: var(--disp);
  font-size: 15px;
  font-weight: bold;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: #fff;
  background: linear-gradient(180deg, #4a5f7a 0%, var(--ink) 52%, #16213a 100%);
  border-bottom: var(--hard);
}

/* ---------- Dropzone ---------- */

.dropzone {
  border: 3px dashed var(--ink);
  background:
    repeating-linear-gradient(45deg, rgba(0,217,255,.10) 0 10px, transparent 10px 20px),
    var(--panel-2);
  padding: 26px 16px;
  text-align: center;
  cursor: pointer;
  transition: background-color .15s, transform .15s;
}
.dropzone:hover { background-color: #ddf1ff; }
.dropzone.is-over {
  background-color: var(--lime);
  transform: scale(1.015);
  border-style: solid;
}

.dropzone__disc {
  width: 62px; height: 62px;
  margin: 0 auto 14px;
  border-radius: 50%;
  border: var(--hard);
  background:
    radial-gradient(circle at 50% 50%, #fff 0 16%, transparent 17%),
    conic-gradient(from 200deg, var(--magenta), var(--violet), var(--cyan), var(--lime), var(--magenta));
  box-shadow: inset 0 0 0 3px #fff, var(--pop-sm);
}

.dropzone__lead {
  margin: 0 0 6px;
  font-family: var(--disp);
  font-size: 18px;
  font-weight: bold;
  letter-spacing: .06em;
}
.dropzone__sub { margin: 0 0 10px; font-size: 11px; text-transform: uppercase; letter-spacing: .16em; }
.dropzone__fine { margin: 14px 0 0; font-size: 10px; line-height: 1.7; color: #40546b; }

.filename {
  margin: 12px 0 0;
  padding: 8px 10px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: bold;
  background: var(--lime);
  border: var(--hard);
  word-break: break-all;
}

/* ---------- Params ---------- */

.param { margin-bottom: 18px; }
.param[hidden] { display: none; }

.param__label {
  display: flex;
  align-items: center;
  gap: 7px;
  flex-wrap: wrap;
  font-family: var(--disp);
  font-size: 13px;
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: 7px;
}

.flag {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: bold;
  background: var(--ink);
  color: var(--cyan);
  padding: 2px 6px;
  text-transform: none;
  letter-spacing: 0;
}

.param__value {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: bold;
  background: var(--magenta);
  color: #fff;
  padding: 2px 8px;
  border: 2px solid var(--ink);
}

.param__hint { margin: 6px 0 0; font-size: 10.5px; line-height: 1.6; color: #40546b; }

.selectwrap { position: relative; }
.selectwrap::after {
  content: "\25BC";
  position: absolute;
  right: 3px; top: 3px; bottom: 3px;
  width: 28px;
  display: grid;
  place-items: center;
  font-size: 9px;
  color: var(--ink);
  background: linear-gradient(180deg, var(--chrome-hi) 0%, var(--chrome) 48%, var(--chrome-lo) 100%);
  border-left: 2px solid var(--ink);
  pointer-events: none;
}
.selectwrap select {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  padding: 9px 40px 9px 10px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: bold;
  color: var(--ink);
  background: #fff;
  border: var(--hard);
  cursor: pointer;
}
.selectwrap select:hover { background: var(--panel-2); }

.fileinput {
  width: 100%;
  font-family: var(--mono);
  font-size: 11px;
  padding: 8px;
  background: #fff;
  border: var(--hard);
}

.dial {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 22px;
  background: transparent;
  cursor: pointer;
}
.dial::-webkit-slider-runnable-track {
  height: 14px;
  background: linear-gradient(180deg, #c9d9e5 0%, #eef6fb 50%, #b9cede 100%);
  border: 2px solid var(--ink);
}
.dial::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 26px;
  margin-top: -8px;
  background: linear-gradient(180deg, var(--chrome-hi) 0%, var(--chrome) 45%, var(--chrome-lo) 100%);
  border: 2px solid var(--ink);
  box-shadow: 2px 2px 0 rgba(10,16,32,.55);
}
.dial::-webkit-slider-thumb:active { background: var(--magenta); }
.dial::-moz-range-track {
  height: 14px;
  background: linear-gradient(180deg, #c9d9e5 0%, #eef6fb 50%, #b9cede 100%);
  border: 2px solid var(--ink);
}
.dial::-moz-range-thumb {
  width: 16px; height: 24px;
  border-radius: 0;
  background: linear-gradient(180deg, var(--chrome-hi) 0%, var(--chrome) 45%, var(--chrome-lo) 100%);
  border: 2px solid var(--ink);
}

.rule { border: 0; border-top: 3px dotted var(--ink); margin: 20px 0; }

.hiddennote {
  margin: 0;
  padding: 9px 11px;
  font-size: 10.5px;
  line-height: 1.6;
  background: var(--panel-2);
  border: 2px dashed var(--ink);
}

/* ---------- Viewports ---------- */

.viewer { display: grid; gap: 16px; }

.viewport { margin: 0; }

.viewport__cap {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: bold;
  letter-spacing: .12em;
  padding: 3px 9px;
  background: var(--cyan);
  border: var(--hard);
  border-bottom: 0;
}
.viewport__cap--alt { background: var(--magenta); color: #fff; }

.viewport__box {
  position: relative;
  min-height: 168px;
  display: grid;
  place-items: center;
  padding: 8px;
  background:
    repeating-conic-gradient(#e7eef4 0% 25%, #f7fafc 0% 50%) 50% / 16px 16px;
  border: var(--hard);
}
.viewport__box img { max-height: 300px; width: auto; border: 2px solid var(--ink); }

.viewport__empty {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: #6d8095;
}

.working {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 10px;
  background: rgba(168, 216, 240, .93);
}
.working p {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: bold;
  letter-spacing: .14em;
}
.working__bar {
  width: 160px; height: 18px;
  background: #fff;
  border: var(--hard);
  overflow: hidden;
}
.working__bar span {
  display: block;
  height: 100%;
  width: 40%;
  background: repeating-linear-gradient(90deg, var(--magenta) 0 8px, var(--violet) 8px 16px);
  animation: crawl 1.1s linear infinite;
}
@keyframes crawl { from { transform: translateX(-100%); } to { transform: translateX(280%); } }
@media (prefers-reduced-motion: reduce) { .working__bar span { animation-duration: 3s; } }

.download {
  display: inline-block;
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: bold;
  text-decoration: none;
  padding: 6px 11px;
  background: var(--lime);
  border: var(--hard);
  box-shadow: var(--pop-sm);
  color: var(--ink);
}
.download:hover { background: var(--cyan); color: var(--ink); }

/* ---------- Terminal ---------- */

.terminal { border: var(--hard); background: #0d1524; box-shadow: var(--pop-sm); }

.terminal__bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 9px;
  background: linear-gradient(180deg, #4a5f7a 0%, #23324c 100%);
  border-bottom: 3px solid var(--ink);
}
.terminal__dot {
  width: 10px; height: 10px;
  border: 2px solid var(--ink);
  background: var(--chrome);
}
.terminal__dot:nth-child(1) { background: var(--magenta); }
.terminal__dot:nth-child(2) { background: #ffd23d; }
.terminal__dot:nth-child(3) { background: var(--lime); }
.terminal__name {
  margin-left: 8px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: bold;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: #cfe0ee;
}

.terminal__body { margin: 0; padding: 14px 16px; overflow-x: auto; }
.terminal__body code {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: bold;
  color: var(--lime);
  white-space: pre-wrap;
  word-break: break-all;
}
.terminal__body code::before { content: "$ "; color: var(--cyan); }

/* ---------- Buttons ---------- */

.btn {
  font-family: var(--disp);
  font-weight: bold;
  border: var(--hard);
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
  transition: transform .1s, box-shadow .1s, background-color .12s;
}
.btn:active:not([disabled]) { transform: translate(3px, 3px); box-shadow: none !important; }

.btn--help {
  padding: 8px 14px;
  font-size: 12px;
  letter-spacing: .08em;
  background: var(--lime);
  box-shadow: var(--pop-sm);
}
.btn--help:hover { background: var(--cyan); }

.btn--chrome {
  display: inline-block;
  padding: 9px 20px;
  font-size: 13px;
  letter-spacing: .08em;
  background: linear-gradient(180deg, var(--chrome-hi) 0%, var(--chrome) 46%, var(--chrome-lo) 100%);
  box-shadow: var(--pop-sm);
}
.btn--chrome:hover { background: linear-gradient(180deg, #fff 0%, var(--cyan) 100%); }

.btn--sort {
  display: block;
  width: 100%;
  margin-top: 16px;
  padding: 16px;
  background: linear-gradient(180deg, #ff6bb0 0%, var(--magenta) 46%, #d4176b 100%);
  color: #fff;
  box-shadow: var(--pop);
  text-shadow: 1px 1px 0 rgba(10,16,32,.5);
}
.btn--sort:hover:not([disabled]) { background: linear-gradient(180deg, #ff8cc4 0%, #ff2e88 46%, #e01f78 100%); }
.btn--sort[disabled] {
  background: linear-gradient(180deg, #dfe8ef 0%, #b9c8d6 100%);
  color: #6d8095;
  cursor: not-allowed;
  text-shadow: none;
}
.btn__label { display: block; font-size: 26px; letter-spacing: .22em; line-height: 1.1; }
.btn__sub {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: normal;
  letter-spacing: .1em;
  text-transform: uppercase;
  opacity: .9;
}

.btn--x {
  width: 30px; height: 30px;
  font-size: 18px;
  line-height: 1;
  background: var(--magenta);
  color: #fff;
}

.alert {
  margin: 14px 0 0;
  padding: 11px 13px;
  font-size: 12px;
  font-weight: bold;
  background: #ffe14d;
  border: var(--hard);
  box-shadow: var(--pop-sm);
}

/* ---------- Modal ---------- */

.modal { position: fixed; inset: 0; z-index: 70; display: grid; place-items: center; padding: 20px; }
.modal[hidden] { display: none; }
.modal__backdrop { position: absolute; inset: 0; background: rgba(10, 16, 32, .55); }

.modal__panel {
  position: relative;
  width: min(620px, 100%);
  max-height: 84vh;
  overflow-y: auto;
  background: var(--panel);
  border: var(--hard);
  box-shadow: 8px 8px 0 var(--ink);
}

.modal__head {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background: linear-gradient(180deg, #4a5f7a 0%, var(--ink) 100%);
  border-bottom: var(--hard);
}
.modal__head h2 {
  margin: 0;
  font-family: var(--disp);
  font-size: 16px;
  letter-spacing: .14em;
  color: #fff;
}

.modal__body { padding: 18px 22px 24px; }
.modal__body ol { margin: 0; padding-left: 20px; }
.modal__body li { margin-bottom: 12px; font-size: 13px; line-height: 1.65; }
.modal__body code { font-family: var(--mono); background: var(--panel-2); padding: 1px 5px; border: 1px solid var(--ink); }
.modal__tip {
  margin: 18px 0 0;
  padding: 12px 14px;
  font-size: 12.5px;
  line-height: 1.7;
  background: var(--panel-2);
  border: 2px dashed var(--ink);
}

/* ---------- Colophon ---------- */

.colophon {
  position: relative;
  z-index: 2;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px 46px;
  font-size: 11.5px;
  line-height: 1.75;
  color: #24384f;
}
.colophon p { margin: 0 0 8px; max-width: 74ch; }

/* ---------- Responsive ---------- */

@media (max-width: 1040px) {
  .workbench { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .panel--drop     { grid-column: 1; }
  .panel--controls { grid-column: 2; }
  .panel--previews { grid-column: 1 / -1; transform: rotate(0); }
  .viewer { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .workbench { grid-template-columns: 1fr; }
  .panel--drop, .panel--controls, .panel--previews, .panel--run { grid-column: 1; }
  .panel--drop { transform: rotate(0); }
  .viewer { grid-template-columns: 1fr; }
  .logo__tag { margin-left: 0; flex-basis: 100%; align-self: flex-start; }
}