:root {
  --bg-top: #f3efe4;
  --bg-bottom: #e9eef4;
  --panel: #fcfbf8;
  --line: rgba(63, 79, 90, 0.14);
  --text: #21303a;
  --muted: #5d6b75;
  --accent: #1d6f75;
  --accent-dark: #14555a;
  --shadow: 0 14px 34px rgba(33, 48, 58, 0.1);
  --radius: 26px;
  --board-radius: 32px;
  --cell-size: min(5.8vw, 78px);
  --gap: 7px;
  --font-main: "Trebuchet MS", "Segoe UI", Tahoma, sans-serif;
  --font-display: Georgia, "Times New Roman", serif;
}

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

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  font-family: var(--font-main);
  color: var(--text);
  background: linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
}

body {
  min-height: 100vh;
  overflow: hidden;
}

.reload-hotspot {
  position: fixed;
  top: 0;
  right: 0;
  width: 96px;
  height: 96px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  opacity: 0.01;
  z-index: 20;
}

.page-shell {
  width: min(1920px, 100vw);
  min-height: 100vh;
  margin: 0 auto;
  padding: 10px 10px 82px;
}

.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-dark);
  font-size: 0.85rem;
  font-weight: 700;
}

.brand-block h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.9rem, 4vw, 4.8rem);
  line-height: 0.9;
}

button {
  border: none;
  border-radius: 18px;
  font-family: inherit;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  padding: 15px 16px;
  transition: transform 0.14s ease, box-shadow 0.14s ease, filter 0.14s ease;
}

button:hover,
button:focus-visible {
  transform: translateY(-1px);
  filter: brightness(1.02);
  outline: none;
}

.primary-button {
  background: linear-gradient(180deg, var(--accent), var(--accent-dark));
  color: #fff;
  box-shadow: 0 16px 26px rgba(25, 114, 120, 0.25);
}

.secondary-button,
.icon-button {
  background: #ffffff;
  color: var(--text);
  border: 1px solid var(--line);
  box-shadow: 0 8px 18px rgba(33, 48, 58, 0.06);
}

.exit-link {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: auto;
  min-height: 66px;
  border-radius: 18px;
  background: linear-gradient(180deg, #455560, #29353d);
  color: #ffffff;
  text-decoration: none;
  font-size: 1.15rem;
  font-weight: 700;
  box-shadow: 0 12px 22px rgba(33, 48, 58, 0.2);
}

.exit-link:hover,
.exit-link:focus-visible {
  filter: brightness(1.04);
  outline: none;
}

.layout {
  display: grid;
  grid-template-columns: minmax(250px, 320px) minmax(0, 1fr);
  gap: 12px;
  min-height: calc(100vh - 32px);
  align-items: stretch;
}

.side-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow: auto;
}

.side-main {
  display: grid;
  gap: 12px;
  align-content: start;
}

.panel-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 16px;
}

.actions-block {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.stats-card h2,
.info-card h2 {
  font-size: 1.1rem;
  margin: 0 0 8px;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.goal-box {
  grid-column: span 2;
}

.stat-box {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #ffffff;
  padding: 10px 12px;
  min-width: 0;
}

.stat-label {
  display: block;
  color: var(--muted);
  margin-bottom: 4px;
}

.stat-box strong {
  font-size: 1.45rem;
  line-height: 1;
}

.info-card p,
.status-message {
  margin: 0;
  color: var(--muted);
  line-height: 1.4;
}

.info-card p + p {
  margin-top: 8px;
}

.board-panel {
  display: grid;
  align-items: stretch;
}

.board-wrap {
  display: grid;
  place-items: start center;
  min-height: 100%;
  overflow: hidden;
}

.board {
  display: grid;
  grid-template-columns: repeat(8, var(--cell-size));
  gap: var(--gap);
  justify-content: center;
  align-content: center;
  background: linear-gradient(180deg, #294f7c, #163857);
  border-radius: var(--board-radius);
  padding: 16px;
  border: 4px solid rgba(124, 183, 240, 0.24);
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.07);
  max-width: 100%;
  max-height: calc(100vh - 48px);
}

.cell {
  width: var(--cell-size);
  height: var(--cell-size);
  border-radius: 22px;
  border: none;
  position: relative;
  background: rgba(255, 255, 255, 0.045);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.05);
  padding: 0;
}

.cell::before {
  content: "";
  position: absolute;
  inset: 6px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.04);
}

.cell.selected {
  outline: 5px solid #ffe38d;
  outline-offset: 2px;
}

.cell.hint {
  animation: pulse 1.2s ease-in-out infinite;
}

.cell.removing {
  animation: pop 0.22s ease forwards;
}

.gem {
  position: absolute;
  inset: 8px;
  display: block;
  filter: drop-shadow(0 8px 9px rgba(0, 0, 0, 0.28));
  will-change: transform;
}

.gem svg {
  width: 100%;
  height: 100%;
}

.board.busy {
  pointer-events: none;
}

.board.won {
  outline: 6px solid #8ee6a4;
  outline-offset: 6px;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(255, 227, 141, 0.2); }
  50% { transform: scale(1.03); box-shadow: 0 0 0 12px rgba(255, 227, 141, 0); }
}

@keyframes pop {
  to {
    transform: scale(0.55);
    opacity: 0;
  }
}

.gem.swap-from-left { animation: slideFromLeft 0.32s cubic-bezier(0.2, 0.86, 0.28, 1.08); }
.gem.swap-from-right { animation: slideFromRight 0.32s cubic-bezier(0.2, 0.86, 0.28, 1.08); }
.gem.swap-from-top { animation: slideFromTop 0.32s cubic-bezier(0.2, 0.86, 0.28, 1.08); }
.gem.swap-from-bottom { animation: slideFromBottom 0.32s cubic-bezier(0.2, 0.86, 0.28, 1.08); }

@keyframes slideFromLeft {
  0% { transform: translateX(calc((var(--cell-size) + var(--gap)) * -1)) scale(0.96); }
  72% { transform: translateX(4px) scale(1.04); }
  100% { transform: translateX(0) scale(1); }
}

@keyframes slideFromRight {
  0% { transform: translateX(calc(var(--cell-size) + var(--gap))) scale(0.96); }
  72% { transform: translateX(-4px) scale(1.04); }
  100% { transform: translateX(0) scale(1); }
}

@keyframes slideFromTop {
  0% { transform: translateY(calc((var(--cell-size) + var(--gap)) * -1)) scale(0.96); }
  72% { transform: translateY(4px) scale(1.04); }
  100% { transform: translateY(0) scale(1); }
}

@keyframes slideFromBottom {
  0% { transform: translateY(calc(var(--cell-size) + var(--gap))) scale(0.96); }
  72% { transform: translateY(-4px) scale(1.04); }
  100% { transform: translateY(0) scale(1); }
}

@media (max-width: 1280px) {
  :root {
    --cell-size: min(6.1vw, 72px);
  }
}

@media (max-width: 1080px) {
  .layout {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .side-panel,
  .board-panel {
    min-height: auto;
  }
}

@media (max-width: 720px) {
  :root {
    --cell-size: min(11vw, 62px);
    --gap: 6px;
  }

  .page-shell {
    width: min(100%, calc(100% - 16px));
    padding: 10px 8px;
  }

  .actions-block,
  .stat-grid {
    grid-template-columns: 1fr;
  }

  .panel-card {
    padding: 16px;
  }

  .board {
    padding: 12px;
  }
}