*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #121213;
  --surface: #1a1a1b;
  --border: #3a3a3c;
  --text: #ffffff;
  --text-muted: #818384;
  --correct: #538d4e;
  --present: #b59f3b;
  --absent: #3a3a3c;
  --tile-border-empty: #3a3a3c;
  --tile-border-filled: #565758;
  --key-bg: #818384;
  --key-text: #ffffff;
  --accent: #538d4e;
  --error: #e74c3c;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* ── Header ── */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  height: 56px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

header h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
}

header nav { display: flex; gap: 16px; align-items: center; }

header nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: .85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .05em;
  transition: color .15s;
}
header nav a:hover, header nav a.active { color: var(--text); }

/* ── Main layout ── */
main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px;
  gap: 16px;
  max-width: 500px;
  width: 100%;
  margin: 0 auto;
}

/* ── Date nav ── */
.date-nav {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  justify-content: center;
}

.date-nav button {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  width: 36px;
  height: 36px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .15s;
}
.date-nav button:hover:not(:disabled) { background: var(--surface); }
.date-nav button:disabled { opacity: .3; cursor: default; }

.date-nav .date-label {
  font-size: .9rem;
  font-weight: 600;
  color: var(--text-muted);
  min-width: 130px;
  text-align: center;
}

.date-nav .today-btn {
  font-size: .75rem;
  padding: 4px 10px;
  width: auto;
  color: var(--accent);
  border-color: var(--accent);
}

/* ── Toast ── */
#toast {
  position: fixed;
  top: 70px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 10px 20px;
  border-radius: 6px;
  font-weight: 700;
  font-size: .9rem;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s;
  white-space: nowrap;
}
#toast.show { opacity: 1; }

/* ── Board ── */
#board {
  display: grid;
  grid-template-rows: repeat(6, 1fr);
  gap: 5px;
  width: min(350px, calc(100vw - 32px));
  height: min(420px, calc(100vw - 32px) * 1.2);
}

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

.tile {
  border: 2px solid var(--tile-border-empty);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(1.4rem, 5vw, 2rem);
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text);
  background: var(--bg);
  transition: border-color .05s;
  user-select: none;
}

.tile[data-letter] { border-color: var(--tile-border-filled); }

.tile[data-state="correct"] { background: var(--correct); border-color: var(--correct); }
.tile[data-state="present"] { background: var(--present); border-color: var(--present); }
.tile[data-state="absent"]  { background: var(--absent);  border-color: var(--absent); }

@keyframes pop {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.12); }
  100% { transform: scale(1); }
}
.tile.pop { animation: pop .1s ease-in-out; }

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%       { transform: translateX(-4px); }
  40%       { transform: translateX(4px); }
  60%       { transform: translateX(-4px); }
  80%       { transform: translateX(4px); }
}
.row.shake { animation: shake .4s ease-in-out; }

@keyframes flip {
  0%   { transform: rotateX(0); }
  50%  { transform: rotateX(-90deg); }
  100% { transform: rotateX(0); }
}
.tile.flip { animation: flip .5s ease-in-out; }

/* ── Completed banner ── */
.result-banner {
  width: 100%;
  padding: 12px 16px;
  border-radius: 8px;
  text-align: center;
  font-weight: 700;
}
.result-banner.win  { background: var(--correct); }
.result-banner.lose { background: var(--absent); }

.result-banner p { font-size: .9rem; font-weight: 400; margin-top: 4px; opacity: .85; }

.share-btn {
  margin-top: 10px;
  background: var(--text);
  color: var(--bg);
  border: none;
  padding: 8px 20px;
  border-radius: 6px;
  font-weight: 700;
  cursor: pointer;
  font-size: .9rem;
}

/* ── Keyboard ── */
#keyboard {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}

.key-row {
  display: flex;
  gap: 6px;
  justify-content: center;
}

.key {
  height: 58px;
  min-width: 43px;
  padding: 0 6px;
  border-radius: 4px;
  border: none;
  background: var(--key-bg);
  color: var(--key-text);
  font-size: .85rem;
  font-weight: 700;
  text-transform: uppercase;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .1s, transform .05s;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.key:active { transform: scale(.95); }
.key.wide { min-width: 65px; font-size: .75rem; }

.key[data-state="correct"] { background: var(--correct); }
.key[data-state="present"] { background: var(--present); }
.key[data-state="absent"]  { background: var(--absent); color: #666; }

/* ── Auth pages ── */
.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px 28px;
  width: min(420px, calc(100vw - 32px));
  margin: auto;
}

.auth-card h2 { font-size: 1.4rem; margin-bottom: 8px; }
.auth-card p  { color: var(--text-muted); font-size: .9rem; margin-bottom: 24px; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: .85rem; font-weight: 600; margin-bottom: 6px; color: var(--text-muted); }

.form-group input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 14px;
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: border-color .15s;
}
.form-group input:focus { border-color: var(--accent); }

.btn {
  width: 100%;
  padding: 12px;
  border-radius: 6px;
  border: none;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity .15s;
}
.btn:disabled { opacity: .5; cursor: default; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover:not(:disabled) { opacity: .9; }

.auth-link { text-align: center; margin-top: 20px; font-size: .85rem; color: var(--text-muted); }
.auth-link a { color: var(--accent); text-decoration: none; font-weight: 600; }

.error-msg { color: var(--error); font-size: .85rem; margin-top: 8px; display: none; }
.error-msg.show { display: block; }

/* ── Leaderboard ── */
.leaderboard-page { width: min(600px, calc(100vw - 32px)); margin: 0 auto; }

.lb-meta {
  color: var(--text-muted);
  font-size: .85rem;
  margin-bottom: 24px;
}

.tier { margin-bottom: 32px; }

.tier-header {
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-muted);
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

.tier-header.main-league { color: var(--correct); }

.lb-row {
  display: grid;
  grid-template-columns: 32px 1fr 80px 80px 80px;
  gap: 8px;
  align-items: center;
  padding: 10px 12px;
  border-radius: 6px;
  font-size: .9rem;
}

.lb-row:nth-child(even) { background: var(--surface); }
.lb-row.me { outline: 1px solid var(--accent); }

.lb-rank { font-weight: 700; color: var(--text-muted); text-align: center; }
.lb-name { font-weight: 600; }
.lb-stat { text-align: right; color: var(--text-muted); font-size: .8rem; }
.lb-stat span { display: block; color: var(--text); font-weight: 600; font-size: .95rem; }

.lb-header {
  display: grid;
  grid-template-columns: 32px 1fr 80px 80px 80px;
  gap: 8px;
  padding: 0 12px 6px;
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-muted);
}

@media (max-width: 400px) {
  .lb-row, .lb-header { grid-template-columns: 28px 1fr 60px 60px; }
  .lb-row .lb-stat:last-child, .lb-header span:last-child { display: none; }
}