:root {
  --bg-1: #f6efe7;
  --bg-2: #c8e6dc;
  --ink: #1d2830;
  --panel: #ffffffea;
  --line: #0a7a66;
  --line-2: #d5472f;
  --muted: #5e6d78;
  --accent: #ef6f39;
  --soft-btn: #1f3d49;
  --tile: #f9fdff;
  --tile-line: #d6e4ec;
  --absent: #52626b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 20% 15%, #fff7d9 0%, transparent 30%),
    radial-gradient(circle at 80% 10%, #d8f7ff 0%, transparent 30%),
    linear-gradient(135deg, var(--bg-1), var(--bg-2));
}

.app {
  width: min(96vw, 620px);
  margin: 0 auto;
  padding: 1.25rem 0.75rem 1.5rem;
}

header {
  margin-bottom: 0.65rem;
}

h1 {
  margin: 0;
  text-align: center;
  font-size: clamp(1.85rem, 5.5vw, 2.45rem);
}

.subtitle {
  margin: 0.2rem 0 0.9rem;
  text-align: center;
  color: var(--line-2);
  font-family: "IBM Plex Mono", monospace;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-size: 0.82rem;
}

.top-tools {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.8rem;
  background: var(--panel);
  border: 1px solid #fff;
  border-radius: 18px;
  box-shadow: 0 18px 40px #24453f1a;
  padding: 0.55rem 0.7rem;
}

.countdown {
  margin: 0;
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
}

.yesterday-word {
  margin: 0.15rem 0 0;
  text-align: center;
  color: #2d3d48;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
}

.board {
  display: grid;
  gap: 0.34rem;
  margin: 0 auto 0.9rem;
  max-width: 400px;
  background: var(--panel);
  border: 1px solid #fff;
  border-radius: 18px;
  box-shadow: 0 18px 40px #24453f1a;
  padding: 0.65rem;
}

.row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.34rem;
}

.tile {
  aspect-ratio: 1;
  border: 2px solid var(--tile-line);
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: clamp(1.45rem, 5.2vw, 1.95rem);
  font-weight: 700;
  text-transform: uppercase;
  background: var(--tile);
}

.tile.correct {
  background: var(--line);
  border-color: var(--line);
  color: #fff;
}

.tile.present {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.tile.absent {
  background: var(--absent);
  border-color: var(--absent);
  color: #fff;
}

.controls {
  background: var(--panel);
  border: 1px solid #fff;
  border-radius: 18px;
  box-shadow: 0 18px 40px #24453f1a;
  padding: 0.75rem;
  margin-bottom: 0.8rem;
}

.message {
  margin: 0 0 0.6rem;
  min-height: 1.3rem;
  color: #2d3d48;
}

.buttons {
  display: flex;
  gap: 0.5rem;
}

button {
  border: 0;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-family: inherit;
  font-weight: 700;
  padding: 0.58rem 0.9rem;
  cursor: pointer;
}

button:hover {
  filter: brightness(0.97);
}

button[disabled] {
  background: #9caeb8;
  cursor: not-allowed;
}

.keyboard {
  display: grid;
  gap: 0.36rem;
  background: var(--panel);
  border: 1px solid #fff;
  border-radius: 18px;
  box-shadow: 0 18px 40px #24453f1a;
  padding: 0.75rem 0.55rem;
}

.key-row {
  display: flex;
  justify-content: center;
  gap: 0.35rem;
}

.key {
  min-width: 2rem;
  padding: 0.52rem 0.34rem;
  border-radius: 10px;
  border: 1px solid #c5d5de;
  background: #f3f7fa;
  color: #2d3d48;
  text-transform: uppercase;
  font-size: 0.88rem;
}

.key.wide {
  min-width: 3.8rem;
}

.key.correct {
  background: var(--line);
  border-color: var(--line);
  color: #fff;
}

.key.present {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.key.absent {
  background: var(--absent);
  border-color: var(--absent);
  color: #fff;
}

.legend {
  margin-top: 0.85rem;
  background: var(--panel);
  border: 1px solid #fff;
  border-radius: 18px;
  box-shadow: 0 18px 40px #24453f1a;
  padding: 0.7rem;
  color: var(--muted);
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.8rem;
  font-size: 0.88rem;
}

.tile-demo {
  display: inline-block;
  width: 0.9rem;
  height: 0.9rem;
  border-radius: 3px;
  margin-right: 0.3rem;
  vertical-align: middle;
}

.tile-demo.correct {
  background: var(--line);
}

.tile-demo.present {
  background: var(--accent);
}

.tile-demo.absent {
  background: var(--absent);
}

.help-modal {
  border: 1px solid #fff;
  border-radius: 18px;
  background: var(--panel);
  color: var(--ink);
  width: min(92vw, 520px);
  box-shadow: 0 18px 40px #24453f3a;
  padding: 0;
}

.help-modal::backdrop {
  background: #10242c73;
}

.help-content {
  padding: 1rem;
}

.help-content h2 {
  margin-top: 0;
}

.help-content p {
  color: #2d3d48;
}

.help-content ul {
  padding-left: 1.1rem;
}

.help-content li {
  margin-bottom: 0.3rem;
  color: #2d3d48;
}

#open-help,
#close-help {
  background: var(--soft-btn);
}

.site-footer {
  text-align: center;
  font-family: "IBM Plex Mono", monospace;
  color: #4c606b;
  font-size: 0.82rem;
  padding: 0.8rem 0 0.35rem;
}

@media (max-width: 420px) {
  .top-tools {
    flex-direction: column;
    align-items: stretch;
  }

  .countdown {
    text-align: center;
  }

  .buttons {
    flex-wrap: wrap;
  }
}