/* ══════════════════════════════════════════════
   DeXO — Tic Tac Toe  |  style.css
   ══════════════════════════════════════════════ */

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

:root {
  --bg:       #09090b;
  --card:     #18181b;
  --card2:    #27272a;
  --border:   rgba(255,255,255,.08);
  --text:     #fafafa;
  --text2:    #a1a1aa;
  --x-color:  #818cf8;
  --x-glow:   rgba(129,140,248,.35);
  --o-color:  #fb7185;
  --o-glow:   rgba(251,113,133,.35);
  --cell:     clamp(90px, 22vw, 130px);
  --font:     'Inter', system-ui, sans-serif;
}

html, body {
  height: 100%;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 80px 16px 60px;
  min-height: 100vh;
  background-image:
    radial-gradient(ellipse 60% 40% at 20% 10%, rgba(129,140,248,.07) 0%, transparent 70%),
    radial-gradient(ellipse 60% 40% at 80% 90%, rgba(251,113,133,.07) 0%, transparent 70%);
}

/* ── Back pill ───────────────────────────────── */
.back-pill {
  position: fixed;
  top: 18px; left: 18px;
  display: flex; align-items: center; gap: 6px;
  padding: 7px 14px;
  background: rgba(255,255,255,.07);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: .8rem; font-weight: 500;
  color: var(--text2);
  text-decoration: none;
  transition: background .2s, color .2s;
  z-index: 100;
}
.back-pill:hover { background: rgba(255,255,255,.13); color: var(--text); }

/* ── Wrapper ─────────────────────────────────── */
.wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  width: 100%;
  max-width: 480px;
  padding-bottom: 40px;
}

/* ── Header ──────────────────────────────────── */
header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4px;
}
.brand {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -.5px;
  color: var(--text2);
}
.brand span { color: var(--x-color); }
.sound-btn {
  background: var(--card2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text2); font-size: .9rem;
  width: 36px; height: 36px;
  cursor: pointer;
  transition: background .15s, color .15s;
  display: flex; align-items: center; justify-content: center;
}
.sound-btn:hover { background: rgba(255,255,255,.1); color: var(--text); }
.sound-btn.muted { color: #e74c3c; }

/* ── Score Board ─────────────────────────────── */
.scoreboard {
  width: 100%;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  display: flex;
  align-items: center;
  padding: 16px 20px;
  gap: 8px;
}
.score-card {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: 12px;
  transition: background .25s, box-shadow .25s;
}
.score-card.active-x {
  background: rgba(129,140,248,.1);
  box-shadow: 0 0 0 1px rgba(129,140,248,.25);
}
.score-card.active-o {
  background: rgba(251,113,133,.1);
  box-shadow: 0 0 0 1px rgba(251,113,133,.25);
}
.score-sym { width: 36px; height: 36px; flex-shrink: 0; }
.score-info { display: flex; flex-direction: column; }
.score-label {
  font-size: .6rem; font-weight: 700;
  letter-spacing: .8px; color: var(--text2);
}
.score-num {
  font-size: 1.6rem; font-weight: 800;
  line-height: 1.1;
  transition: transform .2s;
}
.score-num.bump { animation: numBump .25s ease; }
@keyframes numBump {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.4); }
  100% { transform: scale(1); }
}
.score-mid {
  display: flex; flex-direction: column; align-items: center;
  gap: 2px; padding: 0 8px;
}
.score-mid .score-label { font-size: .6rem; font-weight: 700; letter-spacing: .8px; color: var(--text2); }
.score-mid .score-num   { font-size: 1.2rem; font-weight: 700; color: var(--text2); }

/* ── Mode Bar ────────────────────────────────── */
.mode-bar {
  display: flex;
  gap: 8px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 5px;
  width: 100%;
}
.mode-btn {
  flex: 1;
  padding: 9px 12px;
  border: none; border-radius: 8px;
  font-family: var(--font);
  font-size: .82rem; font-weight: 600;
  cursor: pointer;
  background: transparent;
  color: var(--text2);
  transition: background .18s, color .18s;
  display: flex; align-items: center; justify-content: center; gap: 6px;
}
.mode-btn.active { background: var(--card2); color: var(--text); }
.mode-btn:hover:not(.active) { color: var(--text); }

/* ── Difficulty Bar ──────────────────────────── */
.diff-bar {
  display: flex;
  gap: 8px;
  width: 100%;
}
.diff-btn {
  flex: 1;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-family: var(--font);
  font-size: .78rem; font-weight: 600;
  cursor: pointer;
  background: var(--card);
  color: var(--text2);
  transition: all .18s;
  display: flex; align-items: center; justify-content: center; gap: 5px;
}
.diff-btn.active { background: var(--card2); color: var(--text); border-color: rgba(255,255,255,.18); }
.diff-btn:hover:not(.active) { color: var(--text); }

/* ── Turn Indicator ──────────────────────────── */
.turn-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 22px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: .88rem; font-weight: 500;
  color: var(--text2);
  min-width: 220px;
  transition: border-color .3s, box-shadow .3s;
}
.turn-indicator.x-turn {
  border-color: rgba(129,140,248,.4);
  box-shadow: 0 0 16px rgba(129,140,248,.12);
  color: var(--x-color);
}
.turn-indicator.o-turn {
  border-color: rgba(251,113,133,.4);
  box-shadow: 0 0 16px rgba(251,113,133,.12);
  color: var(--o-color);
}
.turn-avatar { width: 22px; height: 22px; flex-shrink: 0; }
.turn-avatar svg { width: 100%; height: 100%; }

/* ── Board ───────────────────────────────────── */
.board-wrap {
  position: relative;
}
.board {
  display: grid;
  grid-template-columns: repeat(3, var(--cell));
  grid-template-rows: repeat(3, var(--cell));
  position: relative;
}
.cell {
  width: var(--cell);
  height: var(--cell);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  position: relative;
  border: 1.5px solid rgba(255,255,255,.1);
  transition: background .15s;
}
/* Outer border removal */
.cell:nth-child(1),.cell:nth-child(2),.cell:nth-child(3) { border-top: none; }
.cell:nth-child(7),.cell:nth-child(8),.cell:nth-child(9) { border-bottom: none; }
.cell:nth-child(1),.cell:nth-child(4),.cell:nth-child(7) { border-left: none; }
.cell:nth-child(3),.cell:nth-child(6),.cell:nth-child(9) { border-right: none; }

.cell:hover:not(.taken) { background: rgba(255,255,255,.04); }
.cell.taken { cursor: default; }

/* hover ghost mark */
.cell:not(.taken):not(.blocked)::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity .2s;
  pointer-events: none;
}

/* ── SVG Marks ───────────────────────────────── */
.mark-svg {
  width: 58%;
  height: 58%;
  display: block;
}

/* X lines */
.x-line {
  stroke: var(--x-color);
  stroke-width: 9;
  stroke-linecap: round;
  stroke-dasharray: 85;
  stroke-dashoffset: 85;
  fill: none;
}
.x-line:nth-child(1) { animation: drawMark .18s ease forwards; }
.x-line:nth-child(2) { animation: drawMark .18s ease .12s forwards; }

/* O circle */
.o-circle {
  fill: none;
  stroke: var(--o-color);
  stroke-width: 8;
  stroke-linecap: round;
  stroke-dasharray: 201;
  stroke-dashoffset: 201;
  animation: drawMark .3s ease forwards;
}

@keyframes drawMark {
  to { stroke-dashoffset: 0; }
}

/* Cell pop-in */
.cell-pop {
  animation: cellPop .15s ease;
}
@keyframes cellPop {
  0%  { transform: scale(.7); opacity: 0; }
  70% { transform: scale(1.08); }
  100%{ transform: scale(1); opacity: 1; }
}

/* Win cells */
.cell.win-cell {
  animation: winPulse .5s ease forwards;
}
.cell.win-cell .x-line  {
  stroke: #c4b5fd;
  filter: drop-shadow(0 0 10px #818cf8);
}
.cell.win-cell .o-circle {
  stroke: #fda4af;
  filter: drop-shadow(0 0 10px #fb7185);
}
@keyframes winPulse {
  0%   { background: transparent; }
  40%  { background: rgba(255,255,255,.08); }
  100% { background: rgba(255,255,255,.04); }
}

/* Draw cells */
.cell.draw-cell .x-line  { stroke: #52525b; }
.cell.draw-cell .o-circle { stroke: #52525b; }

/* Board locked */
.board.locked .cell:not(.taken) { cursor: default; }

/* ── Win Line ─────────────────────────────────── */
.win-line {
  position: absolute;
  background: linear-gradient(90deg, transparent, currentColor, transparent);
  border-radius: 4px;
  height: 4px;
  transform-origin: left center;
  pointer-events: none;
  animation: winLineGrow .35s ease forwards;
}
@keyframes winLineGrow {
  from { transform: scaleX(0) rotate(var(--rot, 0deg)); opacity: 0; }
  to   { transform: scaleX(1) rotate(var(--rot, 0deg)); opacity: 1; }
}

/* ── Result Banner ───────────────────────────── */
.result-banner {
  width: 100%;
  padding: 18px 24px;
  border-radius: 16px;
  text-align: center;
  font-size: 1.15rem;
  font-weight: 700;
  animation: bannerIn .3s ease;
  border: 1px solid;
  letter-spacing: .2px;
}
.result-banner.x-wins {
  background: rgba(129,140,248,.12);
  border-color: rgba(129,140,248,.35);
  color: #c4b5fd;
}
.result-banner.o-wins {
  background: rgba(251,113,133,.12);
  border-color: rgba(251,113,133,.35);
  color: #fda4af;
}
.result-banner.draw {
  background: rgba(255,255,255,.05);
  border-color: rgba(255,255,255,.15);
  color: var(--text2);
}
.result-banner.hidden { display: none; }
@keyframes bannerIn {
  from { opacity: 0; transform: translateY(-8px) scale(.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ── Buttons ─────────────────────────────────── */
.btn-row {
  display: flex; gap: 10px; align-items: center;
  margin-top: 4px;
}
.btn-new {
  padding: 12px 28px;
  background: var(--x-color);
  color: #fff;
  border: none; border-radius: 12px;
  font-family: var(--font);
  font-size: .9rem; font-weight: 700;
  cursor: pointer;
  transition: filter .15s, transform .1s;
  display: flex; align-items: center; gap: 7px;
  box-shadow: 0 4px 20px rgba(129,140,248,.35);
}
.btn-new:hover   { filter: brightness(1.1); }
.btn-new:active  { transform: scale(.96); }
.btn-ghost-sm {
  padding: 10px 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-family: var(--font);
  font-size: .8rem; font-weight: 500;
  color: var(--text2); cursor: pointer;
  transition: background .15s, color .15s;
  display: flex; align-items: center; gap: 6px;
}
.btn-ghost-sm:hover { background: rgba(231,76,60,.1); color: #e74c3c; border-color: rgba(231,76,60,.3); }

/* ── Keyboard hint ───────────────────────────── */
.hint {
  font-size: .72rem; color: rgba(255,255,255,.25);
  letter-spacing: .2px;
}
kbd {
  display: inline-block;
  padding: 1px 5px;
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 4px;
  font-family: var(--font);
  font-size: .7rem;
  background: rgba(255,255,255,.06);
}

/* ── AI Thinking indicator ───────────────────── */
.thinking-dots {
  display: inline-flex; gap: 4px; align-items: center;
}
.thinking-dots span {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--o-color);
  animation: dot .9s ease infinite;
}
.thinking-dots span:nth-child(2) { animation-delay: .15s; }
.thinking-dots span:nth-child(3) { animation-delay: .3s; }
@keyframes dot {
  0%,80%,100% { transform: scale(.6); opacity: .4; }
  40%         { transform: scale(1);  opacity: 1;  }
}

/* ── Confetti canvas ─────────────────────────── */
#confettiCanvas {
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 500;
  display: none;
}

/* ── Toast ───────────────────────────────────── */
.toast {
  position: fixed; bottom: 24px; left: 50%;
  transform: translateX(-50%) translateY(12px);
  background: rgba(24,24,27,.96);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  color: var(--text); font-size: .82rem;
  padding: 9px 18px; border-radius: 999px;
  pointer-events: none; opacity: 0;
  transition: opacity .25s, transform .25s;
  z-index: 999; white-space: nowrap;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Hidden ──────────────────────────────────── */
.hidden { display: none !important; }

/* ── Responsive ──────────────────────────────── */
@media (max-width: 400px) {
  :root { --cell: clamp(80px, 28vw, 110px); }
  body { padding: 70px 10px 50px; }
  .scoreboard { padding: 12px 14px; }
}