/* Ish — bright, fun, thinky. Clean cards on soft paper, tennis-ball yellow
   doing the pop. Light-only by owner decision. */

:root {
  --page: #f5f5f0;
  --card: #ffffff;
  --ink: #16161a;
  --ink-soft: #6e6e73;
  --line: #e4e3dd;
  --panel: #f6f6f1;
  --tennis: #ccff00;   /* the accent */
  --tennis-deep: #b8ea00;
  --blue: #0b57d0;     /* links, focus, percentile */
  --error: #b3261e;
  --mono: "SFMono-Regular", ui-monospace, "Cascadia Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--page);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem;
}

header { text-align: center; margin: 1.6rem 0 1.2rem; }

h1 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0;
  display: inline-block;
}

h1 a { color: inherit; text-decoration: none; }

/* tennis-ball underline */
h1::after {
  content: "";
  display: block;
  height: 7px;
  margin-top: 2px;
  background: var(--tennis);
  border-radius: 999px;
}

.tagline { color: var(--ink-soft); margin: 0.5rem 0 0; font-size: 0.95rem; }

.chip {
  display: inline-block;
  margin-top: 0.7rem;
  padding: 0.25rem 0.85rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
}

main { width: 100%; max-width: 33rem; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.6rem;
  margin-bottom: 1rem;
}

.meta {
  color: var(--ink-soft);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 0.6rem;
}

h2 { font-size: 1.35rem; line-height: 1.4; font-weight: 700; margin: 0 0 1.1rem; }

form { display: flex; flex-wrap: wrap; gap: 0.6rem; }

input[type="text"], input[type="email"] {
  flex: 1 1 12rem;
  font-family: var(--mono);
  font-size: 1rem;
  padding: 0.65rem 0.9rem;
  color: var(--ink);
  background: var(--card);
  border: 1px solid #c9c7c2;
  border-radius: 10px;
}

input:focus { border-color: var(--blue); }

button {
  font: inherit;
  font-weight: 800;
  padding: 0.62rem 1.5rem;
  color: var(--ink);
  background: var(--tennis);
  border: 1.5px solid var(--ink);
  border-radius: 999px;
  cursor: pointer;
}

button:hover { background: var(--tennis-deep); }
button:active { transform: translateY(1px); }

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

.hint { flex-basis: 100%; color: var(--ink-soft); font-size: 0.85rem; margin: 0; }
.error { flex-basis: 100%; color: var(--error); font-weight: 500; margin: 0; }

/* Result card: your answer → feedback → answer → share (+ stats) */
.your-guess { color: var(--ink-soft); margin: 0; }

.grade { font-size: 1.45rem; font-weight: 800; margin: 0.5rem 0 0; }
.off-by { font-size: 1rem; font-weight: 600; color: var(--ink-soft); white-space: nowrap; }

.answer {
  display: inline-block;
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1.3;
  margin: 0.9rem 0 0;
  box-shadow: inset 0 -0.55em var(--tennis); /* highlighter */
}

.percentile { color: var(--blue); font-weight: 600; margin: 0.8rem 0 0; }

.share-row { display: flex; align-items: center; gap: 0.8rem; margin-top: 1.1rem; }
.share-row p { margin: 0; color: var(--ink-soft); font-size: 0.9rem; }

h3 {
  margin: 0 0 0.6rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.napkin {
  font-family: var(--mono);
  font-size: 0.92rem;
  background: var(--panel);
  border-radius: 12px;
  margin: 0;
  padding: 1rem 1rem 1rem 2.3rem;
}

.napkin li { margin: 0.45rem 0; transition: opacity 0.4s, transform 0.4s; }

.step-hidden { opacity: 0; transform: translateY(5px); }

.fun-fact { color: var(--ink-soft); font-size: 0.9rem; }

textarea {
  width: 100%;
  font-family: var(--mono);
  font-size: 0.85rem;
  margin-top: 0.5rem;
  background: var(--panel);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.6rem;
}

details { margin-top: 0.9rem; font-size: 0.9rem; }
summary { color: var(--ink-soft); cursor: pointer; }
a { color: var(--blue); font-weight: 500; }

.stats {
  display: flex;
  gap: 2.2rem;
  border-top: 1px solid var(--line);
  margin: 1.4rem 0 0;
  padding-top: 1.1rem;
}
.stats dt { color: var(--ink-soft); font-size: 0.8rem; }
.stats dd { margin: 0; font-size: 1.35rem; font-weight: 800; }

.back-link { margin: -0.4rem 0 0.8rem; font-size: 0.9rem; }
.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 0.05rem 0.5rem;
  margin-left: 0.4rem;
  background: var(--tennis);
  border-radius: 999px;
}

.reveal-list { list-style: none; margin: 0; padding: 0; }
.reveal-list li { margin: 0.55rem 0; }
.reveal-list a { text-decoration: none; }
.reveal-list a:hover { text-decoration: underline; }
.play-link { display: inline-block; margin-top: 1.1rem; font-weight: 700; }

footer { color: var(--ink-soft); font-size: 0.85rem; margin: 0.5rem 0 1.5rem; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

@media (prefers-reduced-motion: reduce) {
  .napkin li { transition: none; }
  .step-hidden { opacity: 1; transform: none; }
}