/* Snakeword — neon arcade UI theme. */
* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

:root {
  --bg: #0b0e16;
  --panel: #131826;
  --panel-2: #1a2133;
  --line: #232c44;
  --text: #eaf2ff;
  --text-dim: #8b96b8;
  --mint: #3dffa8;
  --cyan: #38d1ff;
  --amber: #ffc93d;
  --danger: #ff5c6a;
  --violet: #b48cff;
}

html, body {
  height: 100%;
  background: var(--bg);
  overflow: hidden;
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  touch-action: none;
  overscroll-behavior: none;
  user-select: none;
  -webkit-user-select: none;
}

#stage {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  aspect-ratio: 720 / 1180;
  box-shadow: 0 0 80px rgba(56,209,255,0.08), 0 0 0 1px var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: var(--bg);
}

#game { width: 100%; height: 100%; display: block; }

.hidden { display: none !important; }

/* ---------- HUD ---------- */
#hud { position: absolute; inset: 0; pointer-events: none; }
#hud button { pointer-events: auto; }

#topbar {
  position: absolute; top: 1.2%; left: 3%; right: 3%;
  display: flex; justify-content: space-between; align-items: flex-start;
}
#hearts { font-size: clamp(14px, 2.4vh, 22px); letter-spacing: 2px; }
#scorebox { text-align: right; }
#scoreVal {
  font-size: clamp(16px, 2.6vh, 26px); font-weight: 800; color: var(--text);
  font-variant-numeric: tabular-nums; letter-spacing: 0.5px;
}
#comboVal { font-size: clamp(11px, 1.6vh, 15px); color: var(--mint); font-weight: 600; min-height: 1em; }

#objectiveBar {
  position: absolute; top: 4.6%; left: 50%; transform: translateX(-50%);
  font-size: clamp(10px, 1.5vh, 14px); color: var(--text-dim);
  font-weight: 600; letter-spacing: 0.4px; white-space: nowrap;
}

#seqwrap {
  position: absolute; top: 6.4%; left: 3%; right: 3%;
  text-align: center;
}
#seqTiles {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 4px;
  min-height: clamp(22px, 3vh, 34px);
}
.seqTile {
  width: clamp(20px, 2.9vh, 34px); height: clamp(20px, 2.9vh, 34px);
  display: flex; align-items: center; justify-content: center;
  background: var(--panel-2); color: var(--text);
  border: 2px solid #33405f; border-radius: 8px;
  font-weight: 800; font-size: clamp(12px, 1.9vh, 21px);
  transition: transform 0.12s;
}
.seqTile.new { animation: tilePop 0.25s ease-out; }
.seq-sm .seqTile { width: clamp(16px, 2.3vh, 27px); height: clamp(16px, 2.3vh, 27px); font-size: clamp(10px, 1.5vh, 17px); border-width: 1.5px; }
.seq-xs .seqTile { width: clamp(13px, 1.9vh, 22px); height: clamp(13px, 1.9vh, 22px); font-size: clamp(9px, 1.3vh, 14px); border-width: 1.5px; border-radius: 5px; }
@keyframes tilePop { 0% { transform: scale(1.7); } 100% { transform: scale(1); } }

.seq-prefix .seqTile { border-color: var(--cyan); box-shadow: 0 0 10px rgba(56,209,255,0.35); }
.seq-complete .seqTile {
  border-color: var(--amber); color: #0d0a02; background: var(--amber);
  box-shadow: 0 0 14px rgba(255,201,61,0.6);
  animation: glowPulse 0.9s infinite alternate;
}
@keyframes glowPulse { from { box-shadow: 0 0 6px rgba(255,201,61,0.35); } to { box-shadow: 0 0 18px rgba(255,201,61,0.8); } }
.seq-dead .seqTile { border-color: var(--danger); color: var(--danger); background: #241019; }

#hintRow {
  margin-top: 5px; min-height: 1.4em;
  font-size: clamp(12px, 1.8vh, 17px);
  color: var(--text-dim); font-weight: 600;
}
#hintRow .hint b { letter-spacing: 1px; }
#hintRow .castReady { color: var(--amber); font-weight: 800; font-size: clamp(12px, 1.9vh, 18px); }
#hintRow .hint { margin: 0 7px; }
#hintRow .deadNote { color: var(--danger); }

#statusRow {
  position: absolute; top: 13.5%; left: 3%;
  font-size: clamp(10px, 1.5vh, 14px); color: var(--cyan); font-weight: 700;
  display: flex; flex-direction: column; gap: 3px; align-items: flex-start;
}
.statusChip { background: rgba(19,24,38,0.85); border: 1px solid var(--line); border-radius: 999px; padding: 1px 9px; }

/* Announcements are slim toasts hugging the top edge — never over the action. */
#banner {
  position: absolute; top: 14.9%; left: 50%; transform: translateX(-50%);
  background: rgba(11,14,22,0.82);
  border: 1px solid var(--line); border-left: 3px solid var(--mint);
  border-radius: 10px;
  color: var(--text);
  padding: 6px 14px; text-align: center;
  font-size: clamp(12px, 1.7vh, 17px); font-weight: 800; letter-spacing: 0.3px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.45);
  animation: bannerIn 0.25s ease-out;
  max-width: 80%;
  pointer-events: none;
  z-index: 5;
}
#banner .sub { font-size: 0.78em; color: var(--text-dim); font-weight: 600; margin-top: 2px; }
@keyframes bannerIn { from { transform: translateX(-50%) translateY(-8px); opacity: 0; } }

/* Tutorial prompts sit in the strip between arena and buttons. */
#tutorialBar {
  position: absolute; bottom: 13%; left: 50%; transform: translateX(-50%);
  background: rgba(11,14,22,0.85);
  border: 1px solid var(--line); border-left: 3px solid var(--cyan);
  border-radius: 10px;
  color: var(--text); padding: 5px 13px;
  font-size: clamp(11px, 1.6vh, 15px); font-weight: 600;
  max-width: 90%; text-align: center;
  pointer-events: none;
}

.bigBtn {
  position: absolute; bottom: 2.2%;
  width: clamp(64px, 10.5vh, 108px); height: clamp(64px, 10.5vh, 108px);
  border-radius: 50%;
  border: 2px solid #33405f;
  background: radial-gradient(circle at 35% 30%, #1e2740, var(--panel));
  color: var(--text);
  font-family: inherit; font-weight: 800;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 1px; cursor: pointer;
  box-shadow: 0 6px 18px rgba(0,0,0,0.55);
  transition: transform 0.1s, box-shadow 0.2s, border-color 0.2s;
  z-index: 4;
}
.bigBtn .btnIcon { font-size: clamp(18px, 3vh, 32px); }
.bigBtn .btnLabel { font-size: clamp(9px, 1.3vh, 14px); letter-spacing: 2px; }
.bigBtn:active { transform: scale(0.93); }
.bigBtn:disabled { opacity: 0.4; cursor: default; }
#castBtn { right: 3.5%; }
#hintBtn { left: 3.5%; border-color: #2a4a5c; }
#hintBtn.ready { border-color: var(--cyan); box-shadow: 0 0 22px rgba(56,209,255,0.5), 0 6px 18px rgba(0,0,0,0.55); }
#castBtn.ready {
  border-color: var(--amber);
  box-shadow: 0 0 26px rgba(255,201,61,0.55), 0 6px 18px rgba(0,0,0,0.55);
  animation: glowPulse 0.9s infinite alternate;
}
.left-handed #castBtn { right: auto; left: 3.5%; }
.left-handed #hintBtn { left: auto; right: 3.5%; }

#pauseBtn {
  position: absolute; top: 1.4%; left: 50%; transform: translateX(-50%);
  width: clamp(30px, 4vh, 44px); height: clamp(30px, 4vh, 44px);
  border-radius: 10px; border: 1px solid var(--line);
  background: rgba(19,24,38,0.8); color: var(--text-dim);
  font-weight: 800; cursor: pointer; font-family: inherit;
  font-size: clamp(11px, 1.6vh, 16px);
}

/* ---------- Slash overlay ---------- */
#slashOverlay {
  position: absolute; inset: 0;
  background: rgba(7,9,15,0.82);
  backdrop-filter: blur(2px);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 16px; z-index: 10;
}
.slashTitle { color: var(--danger); font-size: clamp(15px, 2.4vh, 24px); font-weight: 900; letter-spacing: 4px; }
#slashStrip {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 7px;
  max-width: 92%;
}
.slashTile {
  width: clamp(44px, 6vh, 62px); height: clamp(44px, 6vh, 62px);
  display: flex; align-items: center; justify-content: center;
  background: var(--panel-2); color: var(--text);
  border: 2px solid #33405f; border-radius: 12px;
  font-weight: 900; font-size: clamp(20px, 3vh, 30px);
  cursor: pointer;
  transition: transform 0.12s, background 0.12s, border-color 0.12s, color 0.12s;
}
.slashTile.cutMark {
  background: #2b1219; border-color: var(--danger); color: var(--danger);
  transform: translateY(8px) rotate(2deg);
}
.slashHint { color: var(--text-dim); font-size: clamp(11px, 1.7vh, 15px); font-weight: 600; text-align: center; line-height: 1.5; }
.slashBtns { display: flex; gap: 14px; }

/* ---------- Screens / menus ---------- */
#screens { position: absolute; inset: 0; pointer-events: none; z-index: 20; }
.screen {
  position: absolute; inset: 0;
  pointer-events: auto;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 3vh;
  background:
    radial-gradient(ellipse 90% 50% at 50% 0%, rgba(61,255,168,0.06), transparent),
    radial-gradient(ellipse 70% 40% at 50% 100%, rgba(56,209,255,0.05), transparent),
    rgba(11,14,22,0.88);
  color: var(--text);
  padding: 4% 6%;
  text-align: center;
}
/* The main menu lets the animated arena glow through. */
#screenMain { background:
    radial-gradient(ellipse 90% 50% at 50% 0%, rgba(61,255,168,0.05), transparent),
    rgba(11,14,22,0.55); }
.menuBest { color: var(--amber); font-weight: 800; font-size: clamp(12px, 1.9vh, 17px); letter-spacing: 1px; min-height: 1.2em; }
.bookCard.secret { border-style: dashed; border-color: #4d3f78; opacity: 0.6; cursor: default; }
.bookCard.secret .bw { color: var(--violet); letter-spacing: 3px; }
.bookCard.secret .btier { color: var(--violet); }
.screen h2 { font-size: clamp(20px, 3.2vh, 34px); font-weight: 900; letter-spacing: 4px; text-transform: uppercase; }

.titleArt h1 {
  font-size: clamp(34px, 6vh, 64px);
  font-weight: 900;
  letter-spacing: 8px;
  background: linear-gradient(120deg, var(--mint) 20%, var(--cyan) 80%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: var(--mint);
  filter: drop-shadow(0 0 22px rgba(61,255,168,0.25));
}
.titleSnake { font-size: clamp(40px, 7vh, 76px); animation: floaty 3s ease-in-out infinite; }
@keyframes floaty { 0%,100% { transform: translateY(0) rotate(-4deg); } 50% { transform: translateY(-10px) rotate(5deg); } }
.subtitle { color: var(--text-dim); font-weight: 600; font-size: clamp(12px, 1.8vh, 17px); letter-spacing: 3px; text-transform: uppercase; margin-top: 8px; }
.menuFoot { color: #4c5877; font-size: clamp(11px, 1.6vh, 15px); font-weight: 600; letter-spacing: 0.5px; }

.menuCol { display: flex; flex-direction: column; gap: 1.6vh; width: min(78%, 340px); }

.mbtn {
  font-family: inherit;
  font-size: clamp(14px, 2.1vh, 19px); font-weight: 700; letter-spacing: 0.5px;
  padding: 1.5vh 22px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0,0,0,0.4);
  transition: transform 0.1s, border-color 0.15s, box-shadow 0.15s;
}
.mbtn:hover { border-color: var(--cyan); box-shadow: 0 4px 20px rgba(56,209,255,0.2); }
.mbtn:active { transform: scale(0.96); }
.mbtn.primary {
  background: linear-gradient(120deg, var(--mint), #2ad487);
  border-color: transparent; color: #05140c;
  box-shadow: 0 6px 24px rgba(61,255,168,0.3);
}
.mbtn.danger { border-color: #59303a; color: var(--danger); }
.mbtn.danger:hover { border-color: var(--danger); }
.mbtn:disabled { opacity: 0.4; cursor: default; }

/* Settings */
.settingsList { display: flex; flex-direction: column; gap: 1.8vh; width: min(84%, 380px); text-align: left; }
.settingsList label { display: flex; justify-content: space-between; align-items: center; gap: 12px; font-size: clamp(13px, 1.9vh, 17px); font-weight: 600; }
.settingsList input[type=range] { width: 46%; accent-color: var(--mint); }
.settingsList select {
  font-family: inherit; font-weight: 600; background: var(--panel-2); color: var(--text);
  border: 1px solid var(--line); border-radius: 8px; padding: 5px 8px;
  font-size: clamp(12px, 1.7vh, 15px);
}
.settingsList .chk { justify-content: flex-start; }
.settingsList input[type=checkbox] { width: 20px; height: 20px; accent-color: var(--mint); }

/* Spellbook */
.bookHint { color: var(--text-dim); font-size: clamp(11px, 1.6vh, 14px); font-weight: 600; max-width: 88%; line-height: 1.45; }
#bookGrid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 8px; width: 94%; max-height: 56%;
  overflow-y: auto; padding: 4px;
}
.bookCard {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px; padding: 9px 5px;
  font-size: clamp(10px, 1.5vh, 13px);
  cursor: pointer; position: relative;
  min-height: 9vh;
  transition: border-color 0.15s;
}
.bookCard:hover { border-color: var(--cyan); }
.bookCard .bw { font-weight: 800; letter-spacing: 1px; color: var(--text); font-size: 1.1em; }
.bookCard .bicon { font-size: 1.7em; }
.bookCard .btier { color: var(--cyan); font-weight: 700; font-size: 0.8em; letter-spacing: 0.5px; }
.bookCard .bdesc { color: var(--text-dim); font-size: 0.82em; line-height: 1.3; margin-top: 3px; }
.bookCard.undiscovered { opacity: 0.45; cursor: default; }
.bookCard.undiscovered:hover { border-color: var(--line); }
.bookCard.pinned { border-color: var(--mint); box-shadow: 0 0 12px rgba(61,255,168,0.25); }
.bookCard.pinned::after { content: "📌"; position: absolute; top: 4px; right: 6px; }

/* Scoreboard */
#scoreList { width: min(92%, 420px); max-height: 58%; overflow-y: auto; display: flex; flex-direction: column; gap: 6px; }
.scoreRow {
  display: flex; justify-content: space-between; align-items: baseline;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px; padding: 8px 14px;
  font-size: clamp(12px, 1.9vh, 17px); font-weight: 600;
}
.scoreRow .rk { color: var(--cyan); font-weight: 800; width: 2em; text-align: left; }
.scoreRow .nm { flex: 1; text-align: left; }
.scoreRow .dt { color: #4c5877; font-size: 0.72em; margin-right: 10px; }
.scoreRow .sc { color: var(--amber); font-weight: 800; font-variant-numeric: tabular-nums; }
.scoreRow.empty { color: var(--text-dim); justify-content: center; }
.scoreRow.recent { border-color: var(--mint); box-shadow: 0 0 12px rgba(61,255,168,0.3); }

/* Upgrades */
#upgradeCards { display: flex; flex-direction: column; gap: 1.8vh; width: min(84%, 360px); }
.upCard {
  display: flex; align-items: center; gap: 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px; padding: 1.7vh 16px;
  cursor: pointer; text-align: left;
  transition: transform 0.12s, border-color 0.15s, box-shadow 0.15s;
  color: var(--text);
  font-family: inherit;
}
.upCard:hover { transform: translateY(-2px); border-color: var(--mint); box-shadow: 0 6px 22px rgba(61,255,168,0.18); }
.upCard .uicon { font-size: clamp(22px, 3.4vh, 34px); }
.upCard .uname { font-weight: 800; font-size: clamp(14px, 2vh, 18px); letter-spacing: 0.5px; }
.upCard .udesc { color: var(--text-dim); font-weight: 600; font-size: clamp(11px, 1.6vh, 14px); margin-top: 2px; }
.upCard.rare { border-color: #4d3f78; }
.upCard.rare .uname { color: var(--violet); }
.upCard.rare:hover { border-color: var(--violet); box-shadow: 0 6px 22px rgba(180,140,255,0.2); }

.eventText { color: var(--text-dim); font-weight: 600; max-width: 80%; line-height: 1.5; }

/* Summary */
#summaryStats {
  display: flex; flex-direction: column; gap: 0.9vh;
  font-size: clamp(13px, 2vh, 18px); font-weight: 600;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px; padding: 2vh 26px;
  min-width: 60%;
}
#summaryStats .row { display: flex; justify-content: space-between; gap: 26px; }
#summaryStats .k { color: var(--text-dim); }
#summaryStats .v { color: var(--text); font-weight: 800; font-variant-numeric: tabular-nums; }
#nameEntry { display: flex; flex-direction: column; gap: 1vh; align-items: center; }
.hsLabel { color: var(--amber); font-weight: 700; font-size: clamp(13px, 2vh, 17px); }
#nameInput {
  font-family: inherit; font-weight: 700; font-size: clamp(16px, 2.4vh, 22px);
  padding: 9px 14px; border-radius: 12px;
  border: 1px solid var(--mint); background: var(--panel-2); color: var(--text);
  text-align: center; width: min(70vw, 260px);
  outline: none;
}
#nameInput:focus { box-shadow: 0 0 0 3px rgba(61,255,168,0.25); }

button:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }

/* Scrollbars */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-thumb { background: var(--line); border-radius: 4px; }
::-webkit-scrollbar-track { background: transparent; }

@media (prefers-reduced-motion: reduce) {
  .titleSnake, .seq-complete .seqTile, #castBtn.ready { animation: none; }
}