:root {
  color-scheme: dark;
  font-family: Inter, ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  background: #070a0f;
  color: #dce6f2;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top, rgba(88, 166, 255, 0.12), transparent 32rem),
    #070a0f;
}

button, kbd { font: inherit; }

.app-shell {
  width: min(980px, calc(100% - 28px));
  margin: 0 auto;
  padding: 48px 0 36px;
}

.hero { text-align: center; margin-bottom: 22px; }
.eyebrow {
  color: #6e7681;
  font-size: 12px;
  letter-spacing: 0.18em;
  margin-bottom: 10px;
}

h1 {
  margin: 0;
  color: #f0f6fc;
  font-size: clamp(34px, 7vw, 64px);
  letter-spacing: -0.055em;
  line-height: 0.95;
}

.alt { color: #8b949e; margin: 14px 0 8px; }
.alt b { color: #c9d1d9; }

.status-line {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #8b949e;
  font-size: 13px;
}
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #d29922;
  box-shadow: 0 0 12px currentColor;
}
#durum.on { color: #3fb950; }
#durum.off { color: #f85149; }
.status-line:has(#durum.on) .status-dot { background: #3fb950; }
.status-line:has(#durum.off) .status-dot { background: #f85149; }

.game-card {
  border: 1px solid #21262d;
  border-radius: 18px;
  background: rgba(13, 17, 23, 0.9);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.32);
  overflow: hidden;
}

.scoreboard {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  padding: 18px 24px;
  border-bottom: 1px solid #21262d;
  font-size: 15px;
}
.score-side {
  display: flex;
  align-items: baseline;
  justify-content: flex-end;
  gap: 14px;
  color: #8b949e;
}
.score-side b { color: #58a6ff; font-size: 30px; }
.score-ai { justify-content: flex-start; }
.score-ai b { color: #f85149; }
.score-divider { color: #484f58; font-size: 24px; }

.canvas-wrap { padding: 14px; }
#oyun {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  border: 1px solid #30363d;
  border-radius: 12px;
  background: #010409;
}

.game-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 18px 18px;
}
.kontrol { margin: 0; color: #8b949e; font-size: 13px; }
kbd {
  display: inline-block;
  min-width: 25px;
  padding: 3px 6px;
  border: 1px solid #30363d;
  border-bottom-color: #484f58;
  border-radius: 5px;
  background: #161b22;
  color: #c9d1d9;
  text-align: center;
  box-shadow: inset 0 -1px 0 #30363d;
}

#yeniden {
  border: 1px solid #30363d;
  border-radius: 8px;
  padding: 9px 12px;
  background: #161b22;
  color: #c9d1d9;
  cursor: pointer;
}
#yeniden:hover { border-color: #58a6ff; color: #f0f6fc; }

.note {
  margin: 14px 4px 0;
  color: #6e7681;
  font-size: 12px;
  text-align: center;
}

@media (max-width: 640px) {
  .app-shell { padding-top: 28px; }
  .game-footer { align-items: stretch; flex-direction: column; }
  #yeniden { width: 100%; }
  .kontrol { text-align: center; line-height: 2; }
  .scoreboard { padding-inline: 16px; gap: 12px; }
}