/* Flashcard Tape — same paper, ink and rules as the rest of the site. */

:root{
  --paper:#E7EDE4; --card:#FBFCF9; --ink:#16211C; --ink-2:#4A5A50; --ink-3:#7C8C81;
  --rule:#C7D4C3; --rule-2:#DEE7DA; --accent:#B33A28; --good:#2F6B4F;
  --f-display:"Geist",system-ui,-apple-system,BlinkMacSystemFont,sans-serif;
  --f-body:"Geist",system-ui,-apple-system,BlinkMacSystemFont,sans-serif;
  --f-mono:"Geist",system-ui,-apple-system,BlinkMacSystemFont,sans-serif;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --paper:#181818; --card:#1F1F1F; --ink:#E3E3E3; --ink-2:#A8A8A8; --ink-3:#808080;
    --rule:#313131; --rule-2:#272727; --accent:#E8705A; --good:#6FBF92;
  }
}
:root[data-theme="dark"]{
  --paper:#181818; --card:#1F1F1F; --ink:#E3E3E3; --ink-2:#A8A8A8; --ink-3:#808080;
  --rule:#313131; --rule-2:#272727; --accent:#E8705A; --good:#6FBF92;
}

*,*::before,*::after{box-sizing:border-box}
/* class rules like .field{display:flex} would otherwise beat the attribute */
[hidden]{display:none !important}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--paper); color:var(--ink);
  font-family:var(--f-body); font-size:16px; line-height:24px;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:720px;margin:0 auto;padding:48px 16px 80px}

/* --------------------------------------------------------------- header */
.eyebrow{
  font-family:var(--f-mono);font-size:12px;letter-spacing:.01em;
  color:var(--ink-3);margin:0 0 12px;
}
.eyebrow a{color:inherit;text-decoration:none}
.eyebrow a:hover{color:var(--ink)}
h1{font-family:var(--f-display);font-weight:700;font-size:clamp(30px,6vw,36px);
  line-height:1.05;margin:0;letter-spacing:-.015em}
h2{font-family:var(--f-display);font-weight:600;font-size:18px;margin:0;letter-spacing:-.01em}
.lede{margin:12px 0 0;color:var(--ink-2);max-width:52ch}

/* ---------------------------------------------------------------- steps */
.steps{display:flex;gap:2px;margin:32px 0 24px;border-bottom:1.5px solid var(--ink)}
.step{
  appearance:none;background:transparent;border:0;border-bottom:2px solid transparent;
  margin-bottom:-2px;padding:8px 16px 8px;cursor:pointer;color:var(--ink-3);
  font-family:var(--f-mono);font-size:12px;letter-spacing:.01em;
}
.step b{font-weight:500;color:var(--ink-3);margin-right:4px}
.step:hover{color:var(--ink-2)}
.step.is-on{color:var(--ink);border-bottom-color:var(--accent)}
.step.is-on b{color:var(--accent)}
.step:focus-visible{outline:2px solid var(--ink);outline-offset:-2px}

.view{display:block}

/* --------------------------------------------------------------- pieces */
.row{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end;margin:16px 0}
.row-next{margin-top:32px;padding-top:24px;border-top:1px solid var(--rule-2)}
.field{display:flex;flex-direction:column;gap:4px;min-width:0}
.field.grow{flex:1 1 200px}
.label{
  font-family:var(--f-mono);font-size:12px;letter-spacing:.01em;
  color:var(--ink-3);
}
input[type=text],input[type=number],select,textarea{
  font:inherit;color:var(--ink);background:var(--card);
  border:1px solid var(--rule);border-radius:4px;padding:8px 12px;width:100%;
}
input[type=number]{width:96px}
textarea{font-family:var(--f-mono);font-size:14px;line-height:20px;resize:vertical}
input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--accent);outline-offset:-1px;border-color:var(--accent)}

.btn{
  appearance:none;font:inherit;font-size:14px;cursor:pointer;
  background:var(--card);color:var(--ink);border:1px solid var(--rule);
  border-radius:4px;padding:8px 16px;text-decoration:none;display:inline-block;
  transition:background .3s var(--ease),border-color .3s var(--ease);
}
.btn:hover:not(:disabled){border-color:var(--ink-3)}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn-primary{background:var(--ink);color:var(--paper);border-color:var(--ink);font-weight:500}
.btn-primary:hover:not(:disabled){background:var(--ink-2);border-color:var(--ink-2)}
.btn-quiet{background:transparent;color:var(--ink-2);border-color:var(--rule-2)}
@media (prefers-reduced-motion:reduce){.btn{transition:none}}

.check{display:flex;gap:8px;align-items:flex-start;margin:8px 0;font-size:14px;color:var(--ink-2);cursor:pointer}
.check input{margin:4px 0 0;accent-color:var(--accent);flex:none}
.hint{margin:8px 0 0;font-size:12px;color:var(--ink-3);max-width:60ch}
.notice{
  margin:0 0 24px;padding:12px 12px;background:var(--card);
  border-left:2px solid var(--rule);font-size:12px;color:var(--ink-2);border-radius:0 4px 4px 0;
}
.notice-bad{border-left-color:var(--accent);color:var(--ink)}
.notice-good{border-left-color:var(--good)}

.how{margin:16px 0;border:1px solid var(--rule-2);border-radius:4px;background:var(--card)}
.how summary{
  cursor:pointer;padding:12px 12px;font-family:var(--f-mono);font-size:12px;
  letter-spacing:.01em;color:var(--ink-2);
}
.how summary:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}
.how>*:not(summary){margin:0 12px 12px;font-size:12px;color:var(--ink-2);max-width:62ch}
.how ol{padding-left:24px}
.how li{margin:4px 0}
.how pre{
  font-family:var(--f-mono);font-size:12px;line-height:16px;white-space:pre-wrap;
  max-height:340px;overflow:auto;color:var(--ink-2);
}

fieldset.opts{border:1px solid var(--rule-2);border-radius:4px;padding:8px 16px 16px;margin:24px 0;background:var(--card)}
.opts legend{
  font-family:var(--f-mono);font-size:12px;letter-spacing:.01em;
  color:var(--ink-3);padding:0 8px;
}
.opt{display:flex;gap:8px;align-items:flex-start;margin:12px 0;font-size:14px;color:var(--ink-2);cursor:pointer}
.opt input{margin:4px 0 0;accent-color:var(--accent);flex:none}
.opt b{color:var(--ink);font-weight:600}

/* ---------------------------------------------------------------- cards */
.deckbar{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end;
  padding-bottom:16px;border-bottom:1px solid var(--rule-2)}
.row-seps{align-items:flex-end}
.row-seps .field{flex:1 1 210px}
.detected{margin:2px 0 0;font-size:12px;color:var(--ink-3);min-height:1.2em}

.listhead{display:flex;justify-content:space-between;align-items:center;gap:12px;
  margin:32px 0 0;padding-top:24px;border-top:1.5px solid var(--ink)}
.listtools{display:flex;gap:8px}

.cards{list-style:none;margin:16px 0 0;padding:0;counter-reset:card}
.cards li{
  display:grid;grid-template-columns:30px 1fr 30px;gap:4px 12px;align-items:start;
  padding:12px 0;border-bottom:1px solid var(--rule-2);
}
.cards li::before{
  counter-increment:card;content:counter(card);
  font-family:var(--f-mono);font-size:12px;color:var(--ink-3);padding-top:4px;
}
.c-term{font-weight:600;font-size:14px;outline:none;border-radius:2px}
.c-def{grid-column:2;color:var(--ink-2);font-size:12px;outline:none;border-radius:2px}
.c-term:focus,.c-def:focus{box-shadow:0 0 0 2px var(--accent);padding:1px 4px;margin:-1px -4px}
.c-state{grid-column:2;font-family:var(--f-mono);font-size:12px;letter-spacing:.01em;color:var(--ink-3)}
.c-state.is-done{color:var(--good)}
.c-drop{
  grid-row:1/3;grid-column:3;appearance:none;background:none;border:0;cursor:pointer;
  color:var(--ink-3);font-size:16px;line-height:1;padding:2px 4px;border-radius:4px;
}
.c-drop:hover{color:var(--accent)}
.c-drop:focus-visible{outline:2px solid var(--accent)}

/* --------------------------------------------------------------- studio */
.mic{padding:16px;border:1px solid var(--rule-2);border-radius:4px;background:var(--card)}
.mic-row{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end}
.meter{height:6px;background:var(--rule-2);border-radius:4px;overflow:hidden;margin:16px 0 0}
.meter i{display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:0 50%;background:var(--good);transition:transform .06s linear}
.meter i.is-hot{background:var(--accent)}
@media (prefers-reduced-motion:reduce){.meter i{transition:none}}

.studio{margin:24px 0 0;border:1.5px solid var(--ink);border-radius:4px;background:var(--card);padding:16px}
.studio-head{display:flex;justify-content:space-between;gap:12px;
  font-family:var(--f-mono);font-size:12px;letter-spacing:.01em;color:var(--ink-3)}
.tally{color:var(--ink-3)}

.prompt{margin:16px 0 24px;min-height:150px;display:flex;flex-direction:column;justify-content:center}
.prompt-slot{
  margin:0 0 8px;font-family:var(--f-mono);font-size:12px;letter-spacing:.01em;color:var(--accent);
}
.prompt-text{
  margin:0;font-family:var(--f-display);font-weight:600;
  font-size:clamp(20px,4.4vw,30px);line-height:36px;letter-spacing:-.01em;
}
.prompt-other{margin:16px 0 0;font-size:14px;color:var(--ink-3);max-width:58ch}
.is-recording .prompt-text{color:var(--accent)}

.transport{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin:0 0 12px}
.transport-nav{margin:0;padding-top:12px;border-top:1px solid var(--rule-2)}
.btn-rec{display:inline-flex;align-items:center;gap:8px;min-width:140px;justify-content:center}
.btn-rec .dot{width:11px;height:11px;border-radius:50%;background:var(--accent);flex:none}
.is-recording .btn-rec{border-color:var(--accent);color:var(--accent)}
.is-recording .btn-rec .dot{animation:pulse 1.1s ease-in-out infinite}
@keyframes pulse{50%{opacity:.25}}
@media (prefers-reduced-motion:reduce){.is-recording .btn-rec .dot{animation:none}}
.timer{font-family:var(--f-mono);font-size:14px;color:var(--ink-2);min-width:46px}
.keys{margin:16px 0 0;font-size:12px;color:var(--ink-3)}
kbd{
  font-family:var(--f-mono);font-size:12px;border:1px solid var(--rule);
  border-bottom-width:2px;border-radius:4px;padding:1px 4px;color:var(--ink-2);
}

/* ----------------------------------------------------------------- tape */
.row-gaps{margin-top:8px}
.estimate{margin:0 0 8px;font-size:12px;color:var(--ink-3)}
.progress{margin:16px 0 0}
.bar{height:8px;background:var(--rule-2);border-radius:4px;overflow:hidden}
.bar i{display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:0 50%;background:var(--accent);transition:transform .5s var(--ease)}
@media (prefers-reduced-motion:reduce){.bar i{transition:none}}
.result{margin:24px 0 0;padding-top:24px;border-top:1.5px solid var(--ink)}
.result audio{width:100%;margin:0 0 16px}
#result-note{margin:0 0 12px;color:var(--ink-2)}

.foot{margin-top:48px;padding-top:16px;border-top:1px solid var(--rule-2);
  font-size:12px;color:var(--ink-3)}
.foot p{margin:8px 0;max-width:62ch}
.foot code{font-family:var(--f-mono);font-size:12px}
.foot a{color:var(--ink-2)}

@media (max-width:540px){
  .wrap{padding-top:40px}
  .steps{gap:0}
  .step{padding:8px 8px 8px;font-size:12px}
  .deckbar .field,.row-seps .field{flex:1 1 100%}
  .btn{padding:8px 16px}
}

/* An empty back-of-card still needs something to click on. */
.c-def:empty::before{content:attr(data-empty);color:var(--ink-3);font-style:normal}

/* Hero heading: one left to right text gradient per theme. */
:root{--hero-from:#000000;--hero-to:#666666}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--hero-from:#FFFFFF;--hero-to:#9B9B9B}}
:root[data-theme="dark"]{--hero-from:#FFFFFF;--hero-to:#9B9B9B}
h1{letter-spacing:-.03em;background:linear-gradient(90deg,var(--hero-from),var(--hero-to));-webkit-background-clip:text;background-clip:text;color:transparent;text-wrap:balance}

/* Motion, press, focus and reduced motion: shared across the site. */
:root{--ease:cubic-bezier(.22,1,.36,1);--z-skip:1000}
html{scroll-behavior:smooth}
body{font-variant-numeric:tabular-nums}
.skip{position:fixed;left:16px;top:16px;z-index:var(--z-skip);padding:8px 12px;border-radius:8px;background:var(--ink);color:var(--paper);font-weight:600;font-size:14px;text-decoration:none;transform:translateY(-200%);transition:transform .5s var(--ease)}
.skip:focus{transform:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
button:not(:disabled):active,[role="button"]:active{scale:.98}
@media (hover:hover){button:not(:disabled):hover{filter:brightness(1.08)}}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}
  button:not(:disabled):active,[role="button"]:active{scale:none}
}