@font-face {
  font-family: "Lota Grotesque";
  src: url("public/fonts/LotaGrotesque-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Lota Grotesque";
  src: url("public/fonts/LotaGrotesque-SemiBold.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Lota Grotesque";
  src: url("public/fonts/LotaGrotesque-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  font-size: 16px;
  overscroll-behavior: none;
  overflow: hidden;
  position: fixed;
  width: 100%;
  height: 100%;
}

body {
  font-family:
    "Lota Grotesque",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  background: #f4f4f5;
  color: #27272a;
  min-height: 100dvh;
  display: flex;
  justify-content: center;
  align-items: center;
  overscroll-behavior: none;
  overflow: hidden;
}

#app {
  width: 100%;
  max-width: 500px;
  padding: 16px;
}

/* ── Header ─────────────────────────── */
#header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}
.header-left {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.logo-row {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo {
  height: 20px;
}
.tagline {
  font-size: 14px;
  color: #71717a;
  margin-top: 2px;
}
.btn-new-game {
  font-family: inherit;
  background: #27272a;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.btn-new-game:hover {
  background: #3f3f46;
}

/* ── Progress Bar ────────────────────── */
#progressBar {
  background: #27272a;
  border-radius: 10px;
  padding: 14px 14px 10px;
  margin-bottom: 12px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
#progressBar::-webkit-scrollbar {
  display: none;
}
.progress-track {
  display: flex;
  align-items: center;
  gap: 0;
  min-width: max-content;
}
.progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  min-width: 44px;
  position: relative;
}
.progress-emoji {
  font-size: 20px;
  line-height: 1;
  transition: transform 300ms ease, filter 300ms ease;
  filter: grayscale(1) opacity(0.35);
}
.progress-img {
  height: 22px;
  object-fit: contain;
  transition: transform 300ms ease;
}
.progress-step.reached .progress-emoji {
  filter: grayscale(0) opacity(1);
  transform: scale(1.15);
}
.progress-step.reached .progress-img {
  transform: scale(1.15);
}
.progress-step.current .progress-emoji {
  filter: grayscale(0) opacity(1);
  transform: scale(1.3);
}
.progress-step.current .progress-img {
  transform: scale(1.3);
}
.progress-name {
  font-size: 9px;
  font-weight: 600;
  color: #52525b;
  letter-spacing: 0.02em;
  transition: color 300ms ease;
}
.progress-step.reached .progress-name {
  color: #a1a1aa;
}
.progress-step.current .progress-name {
  color: #fff;
}
.progress-connector {
  width: 16px;
  height: 2px;
  background: #3f3f46;
  flex-shrink: 0;
  transition: background 300ms ease;
}
.progress-connector.filled {
  background: #fbc73c;
}

/* ── Board ───────────────────────────── */
#board {
  position: relative;
  display: grid;
  grid-template-rows: repeat(4, 1fr);
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  background: #27272a;
  border-radius: 12px;
  padding: 10px;
  aspect-ratio: 1;
  overflow: hidden;
  touch-action: none;
}
.cell {
  background: #3f3f46;
  border-radius: 8px;
}

/* ── Animated tiles (absolute, on top of grid) ── */
.tile {
  position: absolute;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  will-change: left, top, transform, opacity;
}
.tile-emoji {
  line-height: 1;
}
.tile-img {
  object-fit: contain;
  pointer-events: none;
}
.tile-name {
  line-height: 1;
  letter-spacing: -0.02em;
  margin-top: 2px;
}

/* Move tiles: slide via transition, then vanish */
.moveTile {
  transition:
    left 100ms ease-in-out,
    top 100ms ease-in-out;
  z-index: 1;
}

/* Merge tiles: appear at destination, scale from 0 with bounce */
.mergeTile {
  transform: scale(0);
  transition: transform 150ms cubic-bezier(0, 0.2, 0, 1.5);
  z-index: 3;
}

/* New tiles: appear at position, scale from 0 gently */
.newTile {
  transform: scale(0);
  transition: transform 200ms ease-out;
  z-index: 2;
}

/* ── Tile colors ─────────────────────── */
.tile[data-value="2"] {
  background: #e4e4e7;
  color: #27272a;
}
.tile[data-value="4"] {
  background: #d4d4d8;
  color: #27272a;
}
.tile[data-value="8"] {
  background: #fde047;
  color: #27272a;
}
.tile[data-value="16"] {
  background: #eab308;
  color: #fff;
}
.tile[data-value="32"] {
  background: #ec4899;
  color: #fff;
}
.tile[data-value="64"] {
  background: #a855f7;
  color: #fff;
}
.tile[data-value="128"] {
  background: #f59e0b;
  color: #fff;
}
.tile[data-value="256"] {
  background: #0ea5e9;
  color: #fff;
  border: 2px solid #fff;
  box-shadow: 0 0 20px #0ea5e9;
}

/* ── Tax tile ────────────────────────── */
.taxTile {
  background: #3f3f46 !important;
  color: #71717a !important;
  outline: 2px dashed #52525b;
  outline-offset: -4px;
}
.tax-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #a1a1aa;
}
.tax-countdown {
  font-size: 20px;
  font-weight: 700;
  color: #71717a;
}

/* ── Overlays ────────────────────────── */
.overlay {
  position: absolute;
  inset: 0;
  z-index: 50;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(39, 39, 42, 0.7);
  border-radius: 12px;
  backdrop-filter: blur(4px);
}
.overlay.visible {
  display: flex;
}
.overlay-content {
  text-align: center;
  color: #fff;
}
.overlay-content h2 {
  font-size: 36px;
  margin-bottom: 8px;
}
.overlay-msg {
  font-size: 15px;
  color: #a1a1aa;
  margin-bottom: 20px;
  line-height: 1.4;
  max-width: 300px;
  margin-left: auto;
  margin-right: auto;
}
.overlay-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
}
.overlay-link {
  display: inline-block;
  margin-top: 16px;
  color: #a1a1aa;
  font-size: 14px;
  text-decoration: underline;
  transition: color 200ms ease;
}
.overlay-link:hover {
  color: #fff;
}

/* ── Hint ────────────────────────────── */
.hint {
  text-align: center;
  color: #a1a1aa;
  font-size: 14px;
  margin-top: 12px;
}

/* ── Onboarding Dialog ──────────────── */
.onboarding-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(6px);
  opacity: 1;
  transition: opacity 300ms ease;
}
.onboarding-backdrop.hidden {
  opacity: 0;
  pointer-events: none;
}
.onboarding-dialog {
  background: #27272a;
  border-radius: 16px;
  padding: 32px 28px 24px;
  max-width: 400px;
  width: calc(100% - 32px);
  color: #fff;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}
.onboarding-slides {
  position: relative;
  min-height: 220px;
}
.onboarding-slide {
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
  animation: slideFadeIn 300ms ease;
}
.onboarding-slide.active {
  display: flex;
}
@keyframes slideFadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.onboarding-emoji {
  font-size: 56px;
  line-height: 1;
  margin-bottom: 4px;
}
.onboarding-hero-img {
  height: 64px;
  object-fit: contain;
  margin-bottom: 4px;
}
.onboarding-tax-preview {
  display: flex;
  justify-content: center;
  margin-bottom: 12px;
}
.onboarding-tax-tile {
  width: 80px;
  height: 80px;
  background: #3f3f46;
  border-radius: 8px;
  outline: 2px dashed #52525b;
  outline-offset: -4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
}
.onboarding-slide h2 {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
  margin: 0;
}
.onboarding-slide p {
  font-size: 14px;
  color: #a1a1aa;
  line-height: 1.6;
  margin: 0;
}
.onboarding-stages {
  display: flex;
  flex-direction: column;
  gap: 14px;
  width: 100%;
}
.onboarding-stage {
  display: flex;
  align-items: center;
  gap: 12px;
  text-align: left;
  padding: 10px 14px;
  background: #3f3f46;
  border-radius: 10px;
}
.onboarding-stage span {
  font-size: 28px;
  line-height: 1;
  flex-shrink: 0;
}
.onboarding-stage-img {
  height: 32px;
  width: 40px;
  object-fit: contain;
  flex-shrink: 0;
}
.onboarding-stage strong {
  font-size: 15px;
  font-weight: 700;
  min-width: 70px;
}
.onboarding-stage small {
  font-size: 13px;
  color: #a1a1aa;
  flex: 1;
}
.onboarding-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 24px;
}
.onboarding-dots {
  display: flex;
  gap: 8px;
}
.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #52525b;
  transition: background 200ms ease;
}
.dot.active {
  background: #fbc73c;
}