@import url('https://fonts.googleapis.com/css2?family=Black+Han+Sans&family=Noto+Sans+KR:wght@300;400;600;700&display=swap');

:root {
  --bg-dark: #f7f4ee;
  --bg-mid: #fbfaf7;
  --accent: #ff9e2c;
  --accent-soft: #ffe3b5;
  --text: #1b1f2a;
  --text-dim: #5c6472;
  --card: rgba(255, 255, 255, 0.78);
  --stroke: rgba(15, 20, 30, 0.08);
  --shadow: 0 24px 60px rgba(17, 23, 36, 0.18);
  --board-bg: rgba(255, 255, 255, 0.9);
  --x-color: #ff6b35;
  --o-color: #2a9df4;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: 'Noto Sans KR', sans-serif;
  background: radial-gradient(circle at top left, #fff2dc 0%, #f6f2ec 45%, #f3f2ef 100%);
  overflow-x: hidden;
}

.bg-orbit {
  position: fixed;
  inset: -30% auto auto -20%;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 184, 92, 0.45), transparent 70%);
  filter: blur(6px);
  animation: orbit 16s ease-in-out infinite alternate;
  z-index: 0;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image: linear-gradient(rgba(20, 24, 34, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 24, 34, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(circle at 70% 10%, rgba(255, 255, 255, 0.8) 0, transparent 60%);
  z-index: 0;
}

.app {
  position: relative;
  z-index: 1;
  max-width: 980px;
  margin: 0 auto;
  padding: 64px 24px 80px;
  display: grid;
  gap: 28px;
}

.hero {
  animation: fade-up 0.9s ease-out both;
}

.eyebrow {
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--accent-soft);
  margin: 0 0 8px;
}

h1 {
  font-family: 'Black Han Sans', sans-serif;
  font-size: clamp(36px, 6vw, 64px);
  margin: 0 0 12px;
}

.sub {
  color: var(--text-dim);
  margin: 0;
  max-width: 520px;
}

.card {
  background: var(--card);
  border: 1px solid var(--stroke);
  border-radius: 24px;
  padding: 28px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
  display: grid;
  gap: 18px;
  animation: fade-up 0.9s ease-out 0.1s both;
}

.status {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--text-dim);
  font-size: 15px;
  font-weight: 600;
}

.board {
  display: grid;
  grid-template-columns: repeat(3, minmax(64px, 1fr));
  gap: 12px;
  background: var(--board-bg);
  border-radius: 20px;
  padding: 16px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.4);
  max-width: 320px;
  margin: 0 auto;
}

.cell {
  aspect-ratio: 1 / 1;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--stroke);
  display: grid;
  place-items: center;
  font-size: clamp(32px, 6vw, 46px);
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.cell:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 18px rgba(17, 23, 36, 0.12);
}

.cell.x {
  color: var(--x-color);
}

.cell.o {
  color: var(--o-color);
}

.cell.winner {
  background: rgba(255, 196, 104, 0.45);
  border-color: rgba(255, 174, 66, 0.6);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

button {
  border: none;
  padding: 12px 18px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.primary {
  background: var(--accent);
  color: #1f1f1f;
  box-shadow: 0 14px 32px rgba(255, 181, 71, 0.35);
}

.primary:hover {
  transform: translateY(-2px);
}

.ghost {
  background: rgba(255, 255, 255, 0.7);
  color: var(--text);
  border: 1px solid var(--stroke);
}

.ghost:hover {
  transform: translateY(-2px);
}

.text {
  background: transparent;
  color: var(--text-dim);
  padding: 6px 0;
}

.meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--text-dim);
  font-size: 14px;
  flex-wrap: wrap;
}

.locked {
  font-weight: 600;
  color: var(--text-dim);
}

.toggle {
  display: flex;
  align-items: center;
  gap: 8px;
}

.toggle input {
  accent-color: var(--accent);
}

.select {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--text-dim);
}

.select select {
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.9);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 13px;
  color: var(--text);
}

.hint {
  margin: 0;
  color: var(--text-dim);
  font-size: 13px;
}

.history {
  display: grid;
  gap: 12px;
}

.history-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.history h2 {
  margin: 0;
  font-size: 18px;
}

.history-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.history-item {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--stroke);
  padding: 12px 16px;
  border-radius: 14px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.history-time {
  color: var(--text-dim);
  font-size: 13px;
}

.toast {
  position: fixed;
  right: 24px;
  bottom: 24px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--stroke);
  padding: 12px 18px;
  border-radius: 999px;
  color: var(--text);
  font-size: 14px;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.3s ease, transform 0.3s ease;
  z-index: 5;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes orbit {
  from {
    transform: translate(0, 0) scale(1);
  }
  to {
    transform: translate(60px, 40px) scale(1.1);
  }
}

@media (max-width: 720px) {
  .app {
    padding-top: 48px;
  }

  .card {
    padding: 22px;
  }

  .controls {
    flex-direction: column;
    align-items: stretch;
  }

  .board {
    gap: 10px;
    padding: 12px;
  }
}