:root {
  --bg: #0a0a0a;
  --panel: #141414;
  --line: #2a2a2a;
  --yellow: #ffd60a;
  --green: #3ddc84;
  --text: #f2f2f2;
  --dim: #8a8a8a;
  --box: 54px;
  --gap: 8px;
  --row-w: calc(5 * var(--box) + 4 * var(--gap));
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html { color-scheme: dark; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  max-width: 760px;
  margin-inline: auto;
  padding: 16px 16px 48px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 8px 20px;
  width: var(--row-w);
}

h1 {
  margin: 0;
  font-size: 26px;
  font-weight: 900;
  letter-spacing: 2px;
  color: var(--yellow);
}

.icon-btn {
  background: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  width: 42px;
  height: 42px;
  color: var(--dim);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, transform 0.15s;
}
.icon-btn svg { width: 20px; height: 20px; }
.icon-btn:hover { color: var(--yellow); border-color: var(--yellow); }
.icon-btn:active { transform: rotate(-180deg) scale(0.92); }

.group { margin-bottom: 18px; width: var(--row-w); }

h2 {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 3px;
  color: var(--dim);
}

.slots, .yrow { display: flex; gap: var(--gap); }

.slots input, .yrow input {
  width: var(--box);
  height: var(--box);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  font-size: 26px;
  font-weight: 800;
  text-align: center;
  text-transform: uppercase;
  caret-color: var(--yellow);
  outline: none;
  transition: border-color 0.15s, background 0.15s;
}
.slots input:focus, .yrow input:focus { border-color: var(--yellow); }
.slots input:not(:placeholder-shown) {
  background: var(--green);
  border-color: var(--green);
  color: #06220f;
}
.yrow input:not(:placeholder-shown) {
  background: var(--yellow);
  border-color: var(--yellow);
  color: #000;
}

.yrow { margin-bottom: var(--gap); align-items: center; }

.rmrow {
  background: none;
  border: none;
  color: var(--dim);
  cursor: pointer;
  padding: 4px;
  margin-left: 2px;
  display: grid;
  place-items: center;
  transition: color 0.12s;
}
.rmrow svg { width: 12px; height: 12px; }
.rmrow:hover { color: var(--yellow); }

.addrow {
  margin-top: 2px;
  background: none;
  border: 1px dashed var(--line);
  border-radius: 10px;
  color: var(--dim);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 2px;
  padding: 8px 14px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.addrow:hover { color: var(--yellow); border-color: var(--yellow); }

.letter-in {
  width: var(--row-w);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  font-size: 18px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0 14px;
  height: var(--box);
  caret-color: var(--yellow);
  outline: none;
  transition: border-color 0.15s;
}
.letter-in:focus { border-color: var(--yellow); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.chips:empty { display: none; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 6px 8px;
}
.chip b { font-size: 18px; min-width: 18px; text-align: center; }
.chip-gray b { color: var(--dim); }

.chip .rm {
  background: none;
  border: none;
  color: var(--dim);
  cursor: pointer;
  padding: 2px;
  display: grid;
  place-items: center;
  transition: color 0.12s;
}
.chip .rm svg { width: 13px; height: 13px; }
.chip .rm:hover { color: var(--yellow); }

.tabs { display: flex; gap: 22px; margin-bottom: 14px; border-bottom: 1px solid var(--line); }

.tabs button {
  position: relative;
  background: none;
  border: none;
  padding: 10px 2px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--dim);
  cursor: pointer;
  transition: color 0.15s;
}
.tabs button::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--yellow);
  transform: scaleX(0);
  transition: transform 0.2s;
}
.tabs button.active { color: var(--yellow); }
.tabs button.active::after { transform: scaleX(1); }

.tabs span {
  font-weight: 700;
  color: var(--text);
  opacity: 0.55;
  margin-left: 2px;
  display: inline-block;
}
.tabs span.pulse { animation: pulse 0.3s; }

@keyframes pulse {
  0% { transform: scale(1.35); color: var(--yellow); opacity: 1; }
  100% { transform: scale(1); }
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(76px, 1fr));
  gap: 8px;
}

.tile {
  display: flex;
  justify-content: center;
  gap: 2px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 0;
  cursor: pointer;
  color: var(--text);
  font-size: 15px;
  font-weight: 700;
  transition: border-color 0.12s, transform 0.12s;
  animation: pop 0.25s both;
  animation-delay: calc(var(--i) * 8ms);
}
.tile span { width: 11px; text-align: center; }
.tile:hover { border-color: var(--yellow); color: var(--yellow); }
.tile:active { transform: scale(0.94); }

@keyframes pop {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.more { margin-top: 12px; text-align: center; color: var(--dim); font-size: 12px; font-weight: 700; letter-spacing: 1px; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translate(-50%, 12px);
  background: var(--yellow);
  color: #000;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 1px;
  padding: 10px 18px;
  border-radius: 10px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s, transform 0.18s;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 480px) {
  :root { --box: 48px; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(64px, 1fr)); }
  .slots input, .yrow input { font-size: 22px; }
  h1 { font-size: 21px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}