/* TRACER: aim research trainer. Tactical HUD styling.
   Fonts are self-hosted (OFL, see fonts/) so participants' browsers never
   contact a third-party font CDN. */

@font-face { font-family: "Chakra Petch"; font-weight: 500; font-display: swap; src: url(fonts/chakrapetch-500.woff2) format("woff2"); }
@font-face { font-family: "Chakra Petch"; font-weight: 600; font-display: swap; src: url(fonts/chakrapetch-600.woff2) format("woff2"); }
@font-face { font-family: "Chakra Petch"; font-weight: 700; font-display: swap; src: url(fonts/chakrapetch-700.woff2) format("woff2"); }
@font-face { font-family: "Barlow"; font-weight: 400; font-display: swap; src: url(fonts/barlow-400.woff2) format("woff2"); }
@font-face { font-family: "Barlow"; font-weight: 500; font-display: swap; src: url(fonts/barlow-500.woff2) format("woff2"); }
@font-face { font-family: "Barlow"; font-weight: 600; font-display: swap; src: url(fonts/barlow-600.woff2) format("woff2"); }
@font-face { font-family: "JetBrains Mono"; font-weight: 100 800; font-display: swap; src: url(fonts/jetbrainsmono-var.woff2) format("woff2"); }

:root {
  /* surfaces */
  --bg: #04060b;
  --bg-2: #080c15;
  --panel: rgba(9, 13, 22, 0.86);
  --panel-solid: #0b111c;
  --field: #060a12;
  --line: #1a2335;
  --line-2: #26344d;
  /* text */
  --text: #e9eef8;
  --text-2: #b4bfd3;
  --muted: #6f7d98;
  /* signal colours */
  --accent: #5ed6a0;       /* jade: crosshair, hits, primary actions */
  --accent-ink: #03140c;
  --accent-glow: rgba(94, 214, 160, 0.35);
  --info: #3ce4ff;         /* cyan: information, horizon */
  --enemy: #ff3d5e;        /* flick targets */
  --spray: #ffae1f;        /* spray targets */
  --warn: #ffcf4d;
  --danger: #ff3d5e;

  --display: "Chakra Petch", "Segoe UI", system-ui, sans-serif;
  --body: "Barlow", "Segoe UI", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
  --cut: 16px; /* angled corner size */
}

* { box-sizing: border-box; }
html, body {
  margin: 0; height: 100%; overflow: hidden;
  background: var(--bg); color: var(--text);
  font: 16px/1.5 var(--body);
  -webkit-font-smoothing: antialiased;
}
canvas { display: block; cursor: crosshair; }
.hidden { display: none !important; }
::selection { background: var(--accent); color: var(--accent-ink); }

/* ---------------------------------------------------------------- overlay */
#overlay {
  position: fixed; inset: 0; overflow-y: auto;
  display: flex;
  padding: 84px 16px 32px;
  background:
    radial-gradient(ellipse at 50% 40%, rgba(4, 6, 11, 0.35), rgba(4, 6, 11, 0.88) 75%),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.018) 0 1px, transparent 1px 3px);
}
/* margin:auto centres the panel when it fits and keeps it fully scrollable when it doesn't */
#overlay > .panel { margin: auto; }

.brand {
  position: fixed; top: 20px; left: 24px; z-index: 5;
  display: flex; align-items: center; gap: 12px; pointer-events: none;
}
.brand svg { width: 30px; height: 30px; filter: drop-shadow(0 0 8px var(--accent-glow)); }
.brand-name { font: 700 22px/1 var(--display); letter-spacing: 0.32em; }
.brand-sub { font: 500 10px/1 var(--mono); letter-spacing: 0.18em; color: var(--muted); margin-top: 5px; text-transform: uppercase; }
#overlay.hidden ~ .brand { display: none; }

/* ------------------------------------------------------------------ panel */
.panel {
  position: relative;
  width: min(680px, 100%);
  padding: 30px 34px 28px;
  background:
    /* corner brackets */
    linear-gradient(var(--accent), var(--accent)) top left / 22px 2px no-repeat,
    linear-gradient(var(--accent), var(--accent)) top left / 2px 22px no-repeat,
    linear-gradient(var(--accent), var(--accent)) bottom right / 22px 2px no-repeat,
    linear-gradient(var(--accent), var(--accent)) bottom right / 2px 22px no-repeat,
    linear-gradient(180deg, rgba(60, 228, 255, 0.04), transparent 120px),
    var(--panel);
  border: 1px solid var(--line);
  backdrop-filter: blur(10px) saturate(1.2);
  -webkit-backdrop-filter: blur(10px) saturate(1.2);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.03);
  animation: panel-in 0.35s cubic-bezier(0.2, 0.9, 0.3, 1) both;
}
.panel.wide { width: min(1080px, 100%); }
@keyframes panel-in { from { opacity: 0; transform: translateY(14px) scale(0.985); } to { opacity: 1; transform: none; } }

.step {
  display: inline-flex; align-items: center; gap: 10px;
  font: 600 11px/1 var(--mono); letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--accent);
}
.step::after { content: ""; width: 48px; height: 1px; background: linear-gradient(90deg, var(--accent), transparent); }
h1 {
  font: 700 clamp(28px, 4vw, 40px)/1.05 var(--display);
  letter-spacing: 0.04em; text-transform: uppercase;
  margin: 10px 0 6px;
}
h2 {
  display: flex; align-items: center; gap: 10px;
  font: 600 11px/1 var(--mono); letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--muted); margin: 26px 0 12px;
}
h2::before { content: ""; width: 6px; height: 6px; background: var(--info); box-shadow: 0 0 10px var(--info); transform: rotate(45deg); }
h2 .opt { color: #4b5874; letter-spacing: 0.12em; }
p { color: var(--text-2); margin: 8px 0; }
.lede { font-size: 17px; color: var(--text-2); max-width: 60ch; }
.muted { color: var(--muted); font-size: 14px; }
.mono { font-family: var(--mono); }
kbd {
  font: 600 12px var(--mono); padding: 1px 6px; border: 1px solid var(--line-2);
  border-bottom-width: 2px; border-radius: 4px; color: var(--text); background: var(--field);
}
ul.ticks { list-style: none; padding: 0; margin: 6px 0; }
ul.ticks li { position: relative; padding-left: 22px; margin: 7px 0; color: var(--text-2); }
ul.ticks li::before { content: "›"; position: absolute; left: 4px; top: -1px; color: var(--accent); font: 700 17px var(--display); }
ul.ticks.no li::before { content: "×"; color: var(--danger); }

.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 26px; }
.split { display: grid; grid-template-columns: 1fr 1.15fr; gap: 0 40px; }
.split > section + section { border-left: 1px solid var(--line); padding-left: 40px; }
@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; }
  .split > section + section { border-left: 0; padding-left: 0; }
}
@media (max-width: 600px) {
  .cols { grid-template-columns: 1fr; }
  .panel { padding: 24px 18px; }
}

/* ----------------------------------------------------------------- inputs */
label.field { display: block; }
.field-label {
  display: block; margin-bottom: 6px;
  font: 600 11px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted);
}
input[type=number], input[type=text] {
  width: 100%; padding: 11px 13px;
  font: 600 17px var(--mono); color: var(--text);
  background: var(--field); border: 1px solid var(--line-2); border-radius: 0;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: border-color 0.15s, box-shadow 0.15s;
  -moz-appearance: textfield;
}
input::-webkit-outer-spin-button, input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
input[type=number]:focus, input[type=text]:focus { outline: none; border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent), 0 0 18px var(--accent-glow); }
input.big { font-size: 26px; padding: 12px 14px; }
input:disabled { color: var(--muted); border-style: dashed; cursor: not-allowed; }

/* segmented pills (radio groups) */
.pills { display: flex; flex-wrap: wrap; gap: 6px; }
.pills input { position: absolute; opacity: 0; pointer-events: none; }
.pills label {
  cursor: pointer; user-select: none;
  padding: 8px 12px; font: 600 13px/1 var(--display); letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--text-2); background: var(--field); border: 1px solid var(--line-2);
  clip-path: polygon(7px 0, 100% 0, calc(100% - 7px) 100%, 0 100%);
  padding-left: 16px; padding-right: 16px;
  transition: color 0.12s, background 0.12s, border-color 0.12s;
}
.pills label:hover { color: var(--text); border-color: var(--muted); }
.pills input:checked + label { color: var(--accent-ink); background: var(--accent); border-color: var(--accent); }
.pills input:focus-visible + label { outline: 2px solid var(--info); outline-offset: 2px; }
.pills.mono { gap: 4px; }
.pills.mono label { font-family: var(--mono); font-size: 12px; letter-spacing: 0; padding: 8px 11px 8px 13px; }

/* volume slider */
input[type=range] { -webkit-appearance: none; appearance: none; flex: 1; min-width: 120px; height: 4px; background: var(--line-2); cursor: pointer; }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 14px; height: 14px; background: var(--accent); transform: rotate(45deg); box-shadow: 0 0 10px var(--accent-glow); }
input[type=range]::-moz-range-thumb { width: 14px; height: 14px; border: 0; border-radius: 0; background: var(--accent); transform: rotate(45deg); }
input[type=range]:disabled { opacity: 0.35; cursor: not-allowed; }
input[type=range]:focus-visible { outline: 2px solid var(--info); outline-offset: 6px; }

/* game tiles */
.games { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.games input { position: absolute; opacity: 0; pointer-events: none; }
.games label {
  --g: var(--accent);
  position: relative; cursor: pointer; user-select: none; overflow: hidden;
  padding: 14px 14px 12px 18px; min-height: 74px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.025), transparent 60%), var(--field);
  border: 1px solid var(--line-2);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  transition: border-color 0.15s, transform 0.15s, background 0.15s;
}
.games label::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--g); opacity: 0.55; transition: opacity 0.15s, box-shadow 0.15s; }
.games label:hover { border-color: var(--muted); transform: translateY(-1px); }
.games .g-name { display: block; font: 700 17px/1.1 var(--display); letter-spacing: 0.04em; text-transform: uppercase; }
.games .g-meta { display: block; margin-top: 6px; font: 500 11px/1.3 var(--mono); color: var(--muted); }
.games input:checked + label {
  border-color: var(--g);
  background: linear-gradient(135deg, color-mix(in srgb, var(--g) 18%, transparent), transparent 70%), var(--field);
}
.games input:checked + label::before { opacity: 1; box-shadow: 0 0 14px var(--g); }
.games input:checked + label::after {
  content: "SELECTED"; position: absolute; right: 12px; bottom: 9px;
  font: 600 9px/1 var(--mono); letter-spacing: 0.2em; color: var(--g);
}
.games input:focus-visible + label { outline: 2px solid var(--info); outline-offset: 2px; }

/* sensitivity readout */
.readout { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 14px; background: var(--line); border: 1px solid var(--line); }
.readout div { background: var(--panel-solid); padding: 10px 12px; }
.readout span { display: block; font: 600 10px/1 var(--mono); letter-spacing: 0.16em; color: var(--muted); text-transform: uppercase; }
.readout strong { display: block; margin-top: 7px; font: 700 21px/1 var(--display); color: var(--text); font-variant-numeric: tabular-nums; }
.readout .hl strong { color: var(--accent); text-shadow: 0 0 16px var(--accent-glow); }
.readout em { font-style: normal; font: 500 12px var(--mono); color: var(--muted); }

/* briefing legend */
.brief { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.brief div { padding: 12px; border: 1px solid var(--line); background: rgba(255, 255, 255, 0.015); }
.brief b { display: flex; align-items: center; gap: 8px; font: 700 13px/1 var(--display); letter-spacing: 0.08em; text-transform: uppercase; }
.brief p { font-size: 14px; margin: 6px 0 0; line-height: 1.4; }
.dot { width: 11px; height: 11px; border-radius: 50%; flex: none; }
.dot.flick { background: var(--enemy); box-shadow: 0 0 10px var(--enemy); }
.dot.spray { background: var(--spray); box-shadow: 0 0 10px var(--spray); }
.dot.score { background: var(--accent); box-shadow: 0 0 10px var(--accent); border-radius: 2px; transform: rotate(45deg); }
@media (max-width: 700px) { .brief { grid-template-columns: 1fr; } }

/* participant chip */
.chip {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 8px 12px; border: 1px solid var(--line-2); background: var(--field);
  font: 600 14px var(--mono); color: var(--info);
}
.chip::before { content: "ID"; font: 600 10px var(--mono); letter-spacing: 0.16em; color: var(--muted); }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

/* checkbox */
.check { display: flex; gap: 12px; align-items: flex-start; cursor: pointer; margin-top: 22px; padding: 14px; border: 1px dashed var(--line-2); }
.check input { appearance: none; -webkit-appearance: none; flex: none; width: 20px; height: 20px; margin: 1px 0 0; border: 1.5px solid var(--muted); background: var(--field); cursor: pointer; display: grid; place-items: center; }
.check input:checked { border-color: var(--accent); background: var(--accent); box-shadow: 0 0 14px var(--accent-glow); }
.check input:checked::after { content: ""; width: 10px; height: 5px; border: solid var(--accent-ink); border-width: 0 0 2.5px 2.5px; transform: translate(0, -2px) rotate(-45deg); }
.check input:focus-visible { outline: 2px solid var(--info); outline-offset: 2px; }

/* ---------------------------------------------------------------- buttons */
.actions { display: flex; gap: 10px; justify-content: flex-end; align-items: center; margin-top: 26px; flex-wrap: wrap; }
.actions .spacer { flex: 1; }
button {
  font: 700 14px/1 var(--display); letter-spacing: 0.14em; text-transform: uppercase;
  padding: 13px 22px; cursor: pointer; color: var(--text);
  background: transparent; border: 1px solid var(--line-2);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: background 0.15s, color 0.15s, border-color 0.15s, box-shadow 0.15s, transform 0.08s;
}
button:hover { border-color: var(--text-2); background: rgba(255, 255, 255, 0.04); }
button:active { transform: translateY(1px); }
button:focus-visible { outline: 2px solid var(--info); outline-offset: 3px; }
button.primary { color: var(--accent-ink); background: var(--accent); border-color: var(--accent); box-shadow: 0 0 0 0 var(--accent-glow); }
button.primary:hover { background: #7fe3b6; box-shadow: 0 0 28px var(--accent-glow); }
button.deploy { font-size: 18px; padding: 18px 34px; }
button.deploy::after { content: "  ▸"; }
button.small { font-size: 11px; padding: 9px 14px; }
button:disabled { opacity: 0.35; cursor: not-allowed; box-shadow: none; transform: none; }

/* status line */
.status { display: flex; align-items: center; gap: 8px; font: 500 12px var(--mono); color: var(--muted); }
.status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--muted); }
.status.ok::before { background: var(--accent); box-shadow: 0 0 8px var(--accent); animation: blink 2s infinite; }
.status.warn::before { background: var(--warn); }
@keyframes blink { 50% { opacity: 0.35; } }
.error { color: var(--danger); font: 600 13px var(--mono); min-height: 1em; margin: 14px 0 0; }

/* ---------------------------------------------------------------- results */
.score-hero { display: flex; align-items: flex-end; gap: 18px; margin: 18px 0 8px; flex-wrap: wrap; }
.score-hero .num {
  font: 700 clamp(64px, 10vw, 104px)/0.85 var(--display); font-variant-numeric: tabular-nums;
  color: var(--accent); text-shadow: 0 0 40px var(--accent-glow);
}
.score-hero .num.neg { color: var(--danger); text-shadow: 0 0 40px rgba(255, 61, 94, 0.35); }
.score-hero .lbl { font: 600 12px/1.3 var(--mono); letter-spacing: 0.2em; color: var(--muted); text-transform: uppercase; padding-bottom: 8px; }
.tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-top: 16px; }
.tiles div { background: var(--panel-solid); padding: 14px; }
.tiles span { display: block; font: 600 10px/1.2 var(--mono); letter-spacing: 0.16em; color: var(--muted); text-transform: uppercase; }
.tiles strong { display: block; margin-top: 8px; font: 700 28px/1 var(--display); font-variant-numeric: tabular-nums; }
.tiles em { display: block; margin-top: 5px; font: 500 12px var(--mono); font-style: normal; color: var(--muted); }
@media (max-width: 700px) { .tiles { grid-template-columns: repeat(2, 1fr); } }
dl.telemetry { display: grid; grid-template-columns: max-content 1fr; gap: 6px 18px; margin: 0; font: 500 13px var(--mono); }
dl.telemetry dt { color: var(--muted); }
dl.telemetry dd { margin: 0; color: var(--text-2); }
.warnings { margin-top: 14px; display: grid; gap: 8px; }
.warnings div { padding: 10px 12px 10px 14px; border-left: 2px solid var(--warn); background: rgba(255, 207, 77, 0.06); color: #f3dc9a; font-size: 14px; }
.warnings div.ok { border-left-color: var(--accent); background: rgba(94, 214, 160, 0.06); color: #b9eed5; }
.save-status { font: 500 13px var(--mono); color: var(--muted); margin: 18px 0 0; }

.notice { padding: 10px 14px; border-left: 2px solid var(--warn); background: rgba(255, 207, 77, 0.07); color: #f3dc9a; font-size: 15px; }

/* credit line on the first page: deliberately quiet */
.credit {
  position: fixed; right: 18px; bottom: 14px; z-index: 5; pointer-events: none;
  font: 500 11px/1 var(--mono); letter-spacing: 0.08em; color: var(--muted); opacity: 0.6;
}

/* -------------------------------------------------------------------- hint */
#hint {
  position: fixed; left: 50%; top: 50%; transform: translate(-50%, -50%);
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  padding: 28px 40px; pointer-events: none; text-align: center;
  background: rgba(4, 6, 11, 0.7); border: 1px solid var(--accent);
  box-shadow: 0 0 40px var(--accent-glow), inset 0 0 30px rgba(94, 214, 160, 0.06);
  animation: pulse 1.6s ease-in-out infinite;
}
#hint .big { font: 700 26px/1 var(--display); letter-spacing: 0.2em; text-transform: uppercase; color: var(--accent); }
#hint .small { font: 500 13px var(--mono); color: var(--text-2); }
@keyframes pulse { 50% { box-shadow: 0 0 14px var(--accent-glow), inset 0 0 30px rgba(94, 214, 160, 0.03); } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}