:root {
  --bg: #0f2a33;
  --bg2: #163a45;
  --panel: #1d4855;
  --tile: #fbf3e4;
  --tile-ink: #2b2118;
  --accent: #ff7a59;
  --ok: #4ecb8f;
  --miss: #e8a33d;
  --ink: #eaf4f4;
  --muted: #9cc0c4;
  --radius: 10px;
  --topbar: rgba(0, 0, 0, .18);
  --cell: rgba(255, 255, 255, .08);
  --cell-border: rgba(255, 255, 255, .12);
  --line: rgba(255, 255, 255, .2);
  --overlay: rgba(5, 18, 22, .78);
  --tile-shadow: var(--tile-shadow);
  --shadow: rgba(0, 0, 0, .4);
  color-scheme: dark;
}

/* Modo claro */
:root[data-theme="light"] {
  --bg: #efe8dc;
  --bg2: #fffaf2;
  --panel: #e3d9ca;
  --tile: #ffffff;
  --tile-ink: #2b2118;
  --accent: #e5603d;
  --ok: #2fa86f;
  --miss: #c47f12;
  --ink: #23343a;
  --muted: #6b7c80;
  --topbar: rgba(255, 255, 255, .6);
  --cell: rgba(35, 52, 58, .06);
  --cell-border: rgba(35, 52, 58, .18);
  --line: rgba(35, 52, 58, .25);
  --overlay: rgba(60, 50, 40, .45);
  --tile-shadow: #d6c8b2;
  --shadow: rgba(60, 40, 20, .2);
  color-scheme: light;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  transition: background .3s, color .3s;
  min-height: 100vh;
  background: radial-gradient(circle at 50% -20%, var(--bg2), var(--bg) 70%);
  color: var(--ink);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  display: flex;
  flex-direction: column;
  user-select: none;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 14px 20px;
  background: var(--topbar);
}
.topbar h1 { margin: 0; font-size: 1.6rem; letter-spacing: .5px; }
.topbar h1 span { color: var(--accent); }

.stats { display: flex; gap: 10px; }
.stat {
  background: var(--panel);
  border-radius: var(--radius);
  padding: 6px 14px;
  text-align: center;
  min-width: 72px;
}
.stat small { display: block; color: var(--muted); font-size: .7rem; text-transform: uppercase; }
.stat b { font-size: 1.25rem; }
.sound { font-size: 1.2rem; padding: 6px 12px; }
.sound.off { opacity: .35; text-decoration: line-through; }
.timer.low b { color: var(--accent); animation: pulse 1s infinite; }

main {
  flex: 1;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 18px 16px 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Grade de palavras */
.slots {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px 22px;
  min-height: 120px;
  /* Fases grandes rolam aqui dentro, mantendo as letras sempre à vista. */
  max-height: 52vh;
  overflow-y: auto;
  padding: 4px;
}
/* Cada tamanho de palavra vira um bloco que quebra em colunas de até 8 linhas. */
.group { display: grid; grid-auto-flow: column; grid-template-rows: repeat(8, auto); gap: 5px 10px; align-content: start; }
.slot { display: flex; gap: 3px; }
.slot span {
  width: 24px; height: 26px;
  border-radius: 5px;
  background: var(--cell);
  border: 1px solid var(--cell-border);
  display: grid; place-items: center;
  font-weight: 700; font-size: .85rem;
  text-transform: uppercase;
}
.slot.hinted span.rev { color: var(--muted); }
.slot.found span { background: var(--ok); border-color: var(--ok); color: #0c2b1d; }
.slot.found.full span { background: var(--accent); border-color: var(--accent); color: #2a0f06; }
.slot.missed span { color: var(--miss); border-color: var(--miss); }
.slot.pop { animation: pop .45s; }

.message { height: 1.4em; margin: 18px 0 6px; font-weight: 600; color: var(--muted); }
.message.good { color: var(--ok); }
.message.bad { color: var(--accent); }

/* Palavra em montagem */
.answer {
  display: flex; gap: 6px;
  min-height: 58px;
  padding: 6px 10px;
  border-bottom: 3px solid var(--line);
  min-width: 260px;
  justify-content: center;
}
.answer.shake { animation: shake .35s; }

.tile {
  width: 54px; height: 54px;
  border: none;
  border-radius: var(--radius);
  background: var(--tile);
  color: var(--tile-ink);
  font-size: 1.6rem; font-weight: 800;
  text-transform: uppercase;
  box-shadow: 0 4px 0 var(--tile-shadow);
  cursor: pointer;
  transition: transform .1s, opacity .15s;
}
.tile:active { transform: translateY(3px); box-shadow: 0 1px 0 var(--tile-shadow); }
.tile.used { opacity: .18; pointer-events: none; }

.letters { display: flex; gap: 8px; margin-top: 18px; flex-wrap: wrap; justify-content: center; }

.actions { display: flex; gap: 10px; margin-top: 22px; flex-wrap: wrap; justify-content: center; }
button {
  font: inherit;
  border: none;
  border-radius: var(--radius);
  padding: 10px 16px;
  background: var(--panel);
  color: var(--ink);
  font-weight: 600;
  cursor: pointer;
}
button:hover { filter: brightness(1.15); }
button.primary { background: var(--accent); color: #2a0f06; }
button.big { font-size: 1.15rem; padding: 12px 34px; }

.progress { color: var(--muted); font-size: .9rem; margin-top: 16px; }

/* Telas */
.overlay {
  position: fixed; inset: 0;
  background: var(--overlay);
  display: grid; place-items: center;
  padding: 16px;
}
.overlay.hidden { display: none; }
.card {
  background: var(--bg2);
  border-radius: 16px;
  padding: 28px;
  max-width: 440px;
  width: 100%;
  text-align: center;
  box-shadow: 0 20px 60px var(--shadow);
}
.card h2 { margin-top: 0; color: var(--accent); font-size: 1.8rem; }
.card ul { text-align: left; padding-left: 20px; line-height: 1.5; }
.card .best { color: var(--muted); margin-bottom: 0; }
.lang-picker { display: flex; align-items: center; justify-content: center; gap: 8px; margin: 4px 0 20px; flex-wrap: wrap; }
.lang-picker[hidden] { display: none; }
.lang-picker small { color: var(--muted); text-transform: uppercase; font-size: .75rem; width: 100%; }
.lang-picker button { border: 2px solid transparent; }
.lang-picker button.active { border-color: var(--accent); }
kbd { background: var(--panel); padding: 1px 6px; border-radius: 4px; font-size: .85em; }

@keyframes pop { 50% { transform: scale(1.15); } }
@keyframes shake { 25% { transform: translateX(-8px); } 75% { transform: translateX(8px); } }
@keyframes pulse { 50% { opacity: .5; } }

@media (max-width: 520px) {
  .tile { width: 44px; height: 44px; font-size: 1.3rem; }
  .slot span { width: 19px; height: 21px; font-size: .7rem; }
  .topbar h1 { font-size: 1.3rem; }
}