:root {
  --bg: #181516;
  --surface: #211d1f;
  --surface-2: #2b2629;
  --text: #f6f3f4;
  --muted: #b9afb3;
  --border: #3e373a;
  --green: #3aa394;
  --yellow: #d3ad69;
  --tile: #615458;
  --danger: #db6b77;
}

* { box-sizing: border-box; }

html { min-height: 100%; background: var(--bg); }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 50% -10%, rgba(58, 163, 148, .12), transparent 36rem),
    var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button, a { font: inherit; }

.page-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 40px 20px;
}

.hero {
  width: min(100%, 620px);
  text-align: center;
}

.brand {
  display: flex;
  justify-content: center;
  gap: 7px;
  margin-bottom: 28px;
}

.brand-tile,
.answer-tile {
  display: grid;
  place-items: center;
  width: 52px;
  aspect-ratio: 1;
  border-radius: 6px;
  background: var(--tile);
  color: white;
  font-weight: 800;
  font-size: 1.45rem;
  text-transform: uppercase;
}

.brand-tile--green { background: var(--green); }
.brand-tile--yellow { background: var(--yellow); }

.eyebrow {
  margin: 0 0 10px;
  color: var(--green);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .16em;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 7vw, 3.45rem);
  line-height: 1.04;
  letter-spacing: -.04em;
}

.subtitle {
  max-width: 550px;
  margin: 18px auto 30px;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.65;
}

.answer-card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(33, 29, 31, .94);
  box-shadow: 0 18px 70px rgba(0, 0, 0, .25);
}

.answer-card__topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
  margin-bottom: 26px;
}

.label {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(58, 163, 148, .15);
  color: #73cfbf;
  font-size: .78rem;
  font-weight: 700;
}

.status-badge--error {
  background: rgba(219, 107, 119, .12);
  color: var(--danger);
}

.tiles {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin: 10px 0 18px;
}

.answer-tile {
  width: clamp(46px, 12vw, 62px);
  border: 2px solid var(--border);
  background: transparent;
  color: var(--muted);
  font-size: clamp(1.25rem, 5vw, 1.7rem);
}

.answer-tile--revealed {
  border-color: var(--green);
  background: var(--green);
  color: #fff;
  animation: reveal .22s ease both;
}

@keyframes reveal {
  from { transform: scale(.88); opacity: .35; }
  to { transform: scale(1); opacity: 1; }
}

.message {
  min-height: 24px;
  margin: 0 0 18px;
  color: var(--muted);
  font-size: .9rem;
}

.primary-button,
.secondary-button {
  width: 100%;
  min-height: 48px;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 800;
  transition: transform .15s ease, opacity .15s ease, background .15s ease;
}

.primary-button {
  border: 0;
  background: var(--green);
  color: #fff;
}

.secondary-button {
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
}

.primary-button:hover,
.secondary-button:hover { transform: translateY(-1px); }
.primary-button:disabled { cursor: wait; opacity: .65; transform: none; }

.actions { margin-top: 22px; }

.game-link {
  color: #d8d0d3;
  text-decoration: none;
  font-size: .9rem;
}
.game-link:hover { color: white; text-decoration: underline; }

.disclaimer {
  margin: 20px 0 0;
  color: #80767a;
  font-size: .75rem;
}

@media (max-width: 520px) {
  .page-shell { padding: 28px 14px; }
  .answer-card { padding: 20px 16px; }
  .brand-tile { width: 44px; }
  .tiles { gap: 6px; }
}

/* v1.1.0 — seleção de modo e múltiplos tabuleiros */
.mode-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 0 0 14px;
  padding: 5px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(33, 29, 31, .72);
}

.mode-tab {
  min-height: 42px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-weight: 800;
  transition: background .15s ease, color .15s ease, transform .15s ease;
}

.mode-tab:hover:not(:disabled) {
  color: var(--text);
  background: var(--surface-2);
}

.mode-tab--active {
  background: var(--green);
  color: #fff;
}

.mode-tab--active:hover:not(:disabled) {
  background: var(--green);
  color: #fff;
}

.mode-tab:disabled {
  cursor: wait;
  opacity: .65;
}

.mode-heading {
  margin: -4px 0 20px;
  text-align: left;
}

.mode-heading strong {
  display: inline-block;
  margin-right: 8px;
  font-size: 1rem;
}

.mode-description {
  color: var(--muted);
  font-size: .78rem;
}

.answer-boards {
  display: grid;
  gap: 14px;
  margin: 8px 0 20px;
}

.answer-boards--1 { grid-template-columns: 1fr; }
.answer-boards--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.answer-boards--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.answer-board {
  min-width: 0;
  padding: 12px 8px;
  border: 1px solid transparent;
  border-radius: 12px;
}

.answer-boards--2 .answer-board,
.answer-boards--4 .answer-board {
  border-color: var(--border);
  background: rgba(43, 38, 41, .45);
}

.board-label {
  display: block;
  margin: 0 0 8px;
  color: var(--muted);
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.answer-board .tiles {
  margin: 0;
}

.answer-boards--2 .answer-tile,
.answer-boards--4 .answer-tile {
  width: clamp(32px, 7vw, 48px);
  font-size: clamp(1rem, 3.6vw, 1.35rem);
}

@media (max-width: 620px) {
  .answer-boards--2,
  .answer-boards--4 {
    grid-template-columns: 1fr;
  }

  .answer-boards--2 .answer-tile,
  .answer-boards--4 .answer-tile {
    width: clamp(42px, 13vw, 54px);
  }
}

@media (max-width: 420px) {
  .mode-tabs { gap: 5px; }
  .mode-tab { min-height: 40px; font-size: .85rem; }
}