/* the ui is styled like pages cut out of an old aerospace technical
   manual: cream paper, hard black borders with a print offset shadow,
   black section tabs, and red ink for anything important */
:root {
  --paper: #f2eee1;
  --paper-dim: #e7e2d1;
  --ink: #1a1b1d;
  --dim: #6f6a5a;
  --red: #d8451f;
  --green: #2e7d4a;
  --shadow: rgba(15, 15, 18, 0.45);
  --font-body: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #0a0c10;
  color: var(--ink);
  font-family: var(--font-body);
}

#scene {
  position: fixed;
  inset: 0;
  display: block;
}

.screen { position: fixed; inset: 0; pointer-events: none; }
.screen > * { pointer-events: auto; }
.hidden { display: none !important; }

/* paper panels with a solid offset shadow, like a sticker on a page */
.panel, .title-block {
  position: relative;
  background: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: 5px 5px 0 var(--shadow);
  padding: 16px;
}

/* type */
h1 {
  font-weight: 800;
  font-size: 2.7rem;
  line-height: 0.95;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  color: var(--ink);
}
h1::after {
  content: '';
  display: block;
  width: 74px;
  height: 7px;
  background: var(--red);
  margin-top: 13px;
}

/* section headers as black tabs */
h2 {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  padding: 4px 9px 3px;
  margin-bottom: 12px;
}
h2::before {
  content: '';
  width: 7px;
  height: 7px;
  background: var(--red);
  flex-shrink: 0;
}
h2.spaced { margin-top: 16px; }

.kicker {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 13px;
}
.kicker::before { content: 'doc 01 // '; color: var(--dim); }

.tagline {
  color: var(--dim);
  margin: 14px 0 22px;
}

.title-best {
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--dim);
}

/* a little barcode in the corner of cover pages, because print */
.title-block::after {
  content: '';
  position: absolute;
  right: 14px;
  bottom: 12px;
  width: 74px;
  height: 15px;
  background: repeating-linear-gradient(
    90deg,
    var(--ink) 0 2px, transparent 2px 5px,
    var(--ink) 5px 6px, transparent 6px 10px,
    var(--ink) 10px 13px, transparent 13px 16px
  );
  opacity: 0.85;
}

/* buttons: stamped ink boxes that fill on hover */
.btn {
  appearance: none;
  display: block;
  width: 100%;
  margin-top: 10px;
  padding: 10px 16px;
  background: var(--paper);
  border: 2px solid var(--ink);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  cursor: pointer;
  box-shadow: 3px 3px 0 var(--shadow);
  transition: background 0.1s, color 0.1s;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--shadow); }
.btn:disabled {
  background: var(--paper-dim);
  color: var(--dim);
  border-color: var(--dim);
  cursor: default;
  box-shadow: none;
}
.btn:disabled:hover { background: var(--paper-dim); color: var(--dim); }

.btn-big {
  background: var(--red);
  border-color: var(--ink);
  color: var(--paper);
  font-weight: 700;
  padding: 13px 16px;
}
.btn-big:hover { background: var(--ink); color: var(--paper); }

/* the launch button keeps its caution stripes, printed in ink and red */
#btn-launch {
  position: relative;
  margin: 16px 0 10px;
}
#btn-launch::before, #btn-launch::after {
  content: '';
  position: absolute;
  left: -2px;
  right: -2px;
  height: 6px;
  background: repeating-linear-gradient(-45deg, var(--ink) 0 7px, var(--red) 7px 14px);
}
#btn-launch::before { top: -9px; }
#btn-launch::after { bottom: -9px; }
#btn-launch:disabled::before, #btn-launch:disabled::after { opacity: 0.15; }

.btn-row { display: flex; gap: 10px; }
.btn-row .btn { flex: 1; }

.corner-btn {
  position: fixed;
  right: 16px;
  bottom: 16px;
  width: auto;
  padding: 7px 14px;
  font-size: 0.68rem;
  z-index: 20;
}

/* build mode layout */
#palette {
  position: absolute;
  left: 16px;
  top: 16px;
  bottom: 16px;
  width: 250px;
  overflow-y: auto;
}
#stats {
  position: absolute;
  right: 16px;
  top: 16px;
  width: 252px;
  /* stop above the stack panel and scroll instead of overlapping it */
  max-height: calc(78vh - 88px);
  overflow-y: auto;
}
#stack-panel {
  position: absolute;
  right: 16px;
  bottom: 56px; /* leaves the corner free for the sound toggle */
  width: 252px;
  max-height: 22vh;
  overflow-y: auto;
}

.hint {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--dim);
  margin-bottom: 8px;
}

.part-category {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--dim);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  margin: 16px 0 6px;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 3px;
}
.part-btn {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--paper);
  border: 1px solid var(--ink);
  border-left: 4px solid var(--ink);
  color: var(--ink);
  padding: 8px 10px;
  margin-bottom: 6px;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.85rem;
}
.part-btn:hover { border-color: var(--red); border-left-color: var(--red); }
.part-btn .part-sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  color: var(--dim);
  margin-top: 3px;
}
.part-btn.active {
  border-left-color: var(--red);
  background: #fbe9de;
}
.part-btn.locked {
  border-style: dashed;
  opacity: 0.6;
  cursor: default;
  background: var(--paper-dim);
}
.part-btn.locked .part-sub { color: var(--red); }
.part-btn.locked:hover { border-color: var(--ink); }

/* stats table */
table { width: 100%; border-collapse: collapse; }
td {
  padding: 4px 0;
  font-size: 0.85rem;
  border-bottom: 1px dotted rgba(26, 27, 29, 0.35);
}
td:first-child {
  color: var(--dim);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
td:last-child {
  text-align: right;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--ink);
}
td:last-child.stat-good { color: var(--green); }
td:last-child.stat-bad { color: var(--red); }

#build-warning {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--red);
  min-height: 1.2em;
  margin: 10px 0 2px;
}
#build-warning.advice { color: #8a6a1d; }

/* mission picker */
.mission-btn {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--paper);
  border: 1px solid var(--ink);
  border-left: 4px solid var(--ink);
  color: var(--ink);
  padding: 7px 10px;
  margin-bottom: 5px;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.82rem;
}
.mission-btn:hover { border-color: var(--red); border-left-color: var(--red); }
.mission-btn.active {
  border-left-color: var(--red);
  background: #fbe9de;
}
.mission-btn .part-sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--dim);
}

/* stack list: strikethrough on hover hints at removal */
.stack-item {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--paper);
  border: 1px solid var(--ink);
  color: var(--ink);
  padding: 6px 10px;
  margin-bottom: 4px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
}
.stack-item:hover {
  border-color: var(--red);
  color: var(--red);
  text-decoration: line-through;
}

/* launch readout */
#flight-readout {
  position: absolute;
  left: 16px;
  top: 16px;
  width: 240px;
}
#fuel-bar {
  position: relative;
  height: 12px;
  background: var(--paper-dim);
  border: 2px solid var(--ink);
  margin-top: 10px;
}
#fuel-bar-fill {
  height: 100%;
  background: var(--red);
  transition: width 0.2s linear;
}
/* segment ticks over the fill */
#fuel-bar::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(90deg, transparent 0 10px, var(--paper) 10px 12px);
  pointer-events: none;
}
.keyhint { margin: 10px 0 0; }

/* flight events look like a rubber stamp slapped on the screen */
#flight-event {
  position: absolute;
  top: 15%;
  left: 50%;
  width: auto;
  transform: translateX(-50%) rotate(-1.5deg);
  background: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: 4px 4px 0 var(--shadow);
  padding: 8px 18px;
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--red);
  opacity: 0;
  transition: opacity 0.25s;
}
#flight-event.show { opacity: 1; }
#flight-event:empty { display: none; }

/* title + results + unlocks blocks */
.title-block {
  position: absolute;
  top: 50%;
  left: 8%;
  transform: translateY(-50%);
  max-width: 400px;
  padding: 30px 32px 36px;
  border-top: 10px solid var(--red);
}
.title-block.wide { max-width: 570px; }

/* results */
#res-graph {
  display: block;
  width: 100%;
  height: auto;
  margin: 14px 0 4px;
  border: 2px solid var(--ink);
  background: var(--paper-dim);
}
.results-table { margin: 12px 0; }
.results-table td { padding: 6px 0; font-size: 0.9rem; }
.results-score td {
  border-top: 2px solid var(--ink);
  border-bottom: none;
  padding-top: 12px;
  font-size: 1.15rem;
}
.results-score td:last-child { color: var(--red); }
#res-best, #res-points {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--dim);
  margin-bottom: 6px;
}

/* unlocks */
#unlock-points {
  font-family: var(--font-mono);
  color: var(--red);
  margin: 8px 0 16px;
}
#unlock-list {
  max-height: 50vh;
  overflow-y: auto;
}
.unlock-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--paper);
  border: 1px solid var(--ink);
  border-left: 4px solid var(--ink);
  padding: 10px 12px;
  margin-bottom: 6px;
  font-size: 0.85rem;
}
.unlock-row .part-sub {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  color: var(--dim);
}
.unlock-row button {
  width: auto;
  margin: 0;
  padding: 6px 14px;
  font-size: 0.66rem;
}
.unlock-owned {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--green);
  font-weight: 700;
}

/* camera hint at the bottom of build mode */
#build-hint {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--paper);
  border: 1px solid var(--ink);
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
}

/* shown only if the game fails to boot */
#boot-error {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-width: 340px;
  background: var(--paper);
  border: 2px solid var(--red);
  box-shadow: 5px 5px 0 var(--shadow);
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink);
  z-index: 50;
}

/* achievement stamps on the results page */
.ach-stamp {
  border: 2px solid var(--red);
  color: var(--red);
  padding: 7px 10px;
  margin: 8px 0;
  transform: rotate(-1.2deg);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.ach-stamp .part-sub {
  display: block;
  color: var(--dim);
  text-transform: none;
  letter-spacing: 0;
  font-size: 0.66rem;
  margin-top: 2px;
}

/* achievement list in the catalog */
.ach-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--ink);
  border-left: 4px solid var(--ink);
  padding: 8px 12px;
  margin-bottom: 6px;
  font-size: 0.85rem;
  opacity: 0.55;
}
.ach-row.earned { opacity: 1; border-left-color: var(--red); }
.ach-row .part-sub {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  color: var(--dim);
}
.ach-state {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  text-transform: uppercase;
  color: var(--dim);
}
.ach-row.earned .ach-state { color: var(--red); font-weight: 700; }

/* scrollbars */
::-webkit-scrollbar { width: 9px; }
::-webkit-scrollbar-track { background: var(--paper-dim); }
::-webkit-scrollbar-thumb { background: var(--ink); }

@media (max-width: 900px) {
  #palette, #stats, #stack-panel { width: 206px; }
  h1 { font-size: 2.1rem; }
  .title-block { left: 5%; padding: 22px; }
}