/* RetroSnake — Polished Styles */

:root {
  --brand-bg:       #0f380f;
  --brand-surface:  #14431a;
  --brand-border:   #2a5c2a;
  --brand-accent:   #8bac0f;
  --brand-accent-h: #9bbf1f;
  --brand-text:     #c7eb8c;
  --brand-muted:    #5e8a3a;
  --brand-success:  #8bac0f;
  --brand-warning:  #d4c020;
  --brand-danger:   #e0533d;
  --radius:         6px;
  --shadow:         0 4px 24px rgba(0,0,0,0.45);
  --font:           'Inter', system-ui, -apple-system, sans-serif;
  --font-heading:   'Press Start 2P', var(--font);

  --lcd-bg:    #9bbc0f;
  --lcd-dark:  #0f380f;
  --lcd-mid:   #306230;
  --lcd-light: #8bac0f;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-tap-highlight-color: transparent; }
body {
  font-family: var(--font);
  background: var(--brand-bg);
  color: var(--brand-text);
  min-height: 100dvh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Layout ──────────────────────────────────────────── */
.app    { display: flex; flex-direction: column; min-height: 100dvh; }
.main   { flex: 1; padding: 1.25rem; max-width: 480px; margin: 0 auto; width: 100%; display: flex; flex-direction: column; align-items: center; }

/* ── Header ──────────────────────────────────────────── */
.header {
  background: linear-gradient(180deg, var(--brand-surface) 0%, rgba(20,67,26,.95) 100%);
  border-bottom: 2px solid var(--brand-border);
  padding: .9rem 1.1rem;
  display: flex; align-items: center; gap: .65rem;
  position: sticky; top: 0; z-index: 100;
  box-shadow: 0 2px 12px rgba(0,0,0,.3);
}
.header h1 {
  font-family: var(--font-heading); font-size: .85rem; font-weight: 400;
  color: var(--brand-accent); letter-spacing: 1px; flex: 1;
  text-shadow: 0 0 10px rgba(139,172,15,.4);
}
.header-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--brand-accent);
  box-shadow: 0 0 8px var(--brand-accent), 0 0 16px rgba(139,172,15,.4);
  flex-shrink: 0;
  animation: dot-pulse 2.5s ease-in-out infinite;
}
@keyframes dot-pulse {
  0%, 100% { box-shadow: 0 0 8px var(--brand-accent), 0 0 16px rgba(139,172,15,.4); }
  50%       { box-shadow: 0 0 14px var(--brand-accent), 0 0 28px rgba(139,172,15,.6); }
}
.header-scores {
  display: flex; align-items: center; gap: .4rem;
  font-family: var(--font-heading); font-size: .7rem; color: var(--brand-text);
}
.score-label      { color: var(--brand-muted); font-size: .55rem; }
.score-label.hi   { margin-left: .5rem; }

/* Improvement 2: speed level badge */
.level-badge {
  margin-left: .6rem;
  font-family: var(--font-heading); font-size: .5rem;
  background: rgba(139,172,15,.15); border: 1px solid rgba(139,172,15,.35);
  color: var(--brand-accent); border-radius: 3px;
  padding: .15rem .4rem; letter-spacing: .5px;
  transition: background .3s, color .3s, border-color .3s;
}
.level-badge.levelled-up {
  background: rgba(139,172,15,.4); color: var(--lcd-bg);
  border-color: var(--brand-accent);
  animation: level-pop .4s ease;
}
@keyframes level-pop {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.35); }
  100% { transform: scale(1); }
}

/* Score pop animation */
@keyframes score-pop {
  0%   { transform: scale(1);   color: var(--brand-text); }
  40%  { transform: scale(1.5); color: var(--lcd-bg); }
  100% { transform: scale(1);   color: var(--brand-text); }
}
.score-popping { animation: score-pop .22s ease; }

/* ── Game board ───────────────────────────────────────── */
.game-wrap {
  position: relative; width: 100%; max-width: 360px;
  margin: 0 auto 1.25rem;
}
#board {
  width: 100%; aspect-ratio: 1 / 1; display: block;
  background: var(--lcd-bg); border: 3px solid var(--brand-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow), inset 0 0 24px rgba(15,56,15,.25), 0 0 0 1px rgba(139,172,15,.15);
  image-rendering: pixelated;
  touch-action: none;
  transition: filter .15s ease;
}
#board.death-flash { filter: brightness(2.2) saturate(0) invert(.3); }

/* ── Pause button ─────────────────────────────────────── */
.pause-btn {
  position: absolute; top: 8px; right: 8px;
  background: rgba(15,56,15,.75); border: 1px solid rgba(139,172,15,.35);
  color: var(--brand-accent); border-radius: 4px;
  width: 30px; height: 30px; font-size: .85rem;
  cursor: pointer; display: none; align-items: center; justify-content: center;
  backdrop-filter: blur(4px); transition: background .15s;
  z-index: 10;
}
.pause-btn.visible { display: flex; }
.pause-btn:hover   { background: rgba(139,172,15,.2); }
.pause-btn:active  { transform: scale(.92); }

/* ── Overlays ─────────────────────────────────────────── */
.overlay {
  position: absolute; inset: 3px; border-radius: var(--radius);
  background: rgba(12, 46, 12, .94);
  backdrop-filter: blur(3px);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 1.25rem .9rem; gap: .7rem;
  opacity: 0; visibility: hidden;
  transition: opacity .22s ease, visibility .22s ease;
  overflow-y: auto;
}
.overlay.show { opacity: 1; visibility: visible; }

.overlay-title {
  font-family: var(--font-heading); color: var(--lcd-bg); font-size: 1.3rem; line-height: 1.6;
  text-shadow: 0 0 18px rgba(155,188,15,.7), 0 0 40px rgba(155,188,15,.3);
  animation: title-glow 3s ease-in-out infinite;
}
@keyframes title-glow {
  0%, 100% { text-shadow: 0 0 12px rgba(155,188,15,.5); }
  50%       { text-shadow: 0 0 22px rgba(155,188,15,.9), 0 0 50px rgba(155,188,15,.3); }
}
.overlay-title.small { font-size: 1rem; animation: none; }
.overlay-sub { font-size: .8rem; color: #c7eb8c; line-height: 1.7; }

/* ── Buttons ─────────────────────────────────────────── */
.btn-game {
  font-family: var(--font-heading); font-size: .75rem;
  background: var(--lcd-bg); color: var(--lcd-dark);
  border: none; padding: .85rem 1.5rem; border-radius: 4px;
  cursor: pointer; letter-spacing: 1px;
  animation: btn-pulse 2.2s ease-in-out infinite;
  position: relative;
}
@keyframes btn-pulse {
  0%, 100% { box-shadow: 0 0 12px rgba(155,188,15,.4); transform: scale(1); }
  50%       { box-shadow: 0 0 26px rgba(155,188,15,.85), 0 0 48px rgba(155,188,15,.25); transform: scale(1.03); }
}
.btn-game:active { animation: none; transform: scale(.93); box-shadow: none; }

/* ── D-pad ────────────────────────────────────────────── */
.dpad {
  display: grid; grid-template-columns: 64px 64px 64px; grid-template-rows: 64px 64px;
  gap: 6px; justify-content: center; margin: 0 auto;
}
.dpad-btn {
  background: var(--brand-surface); border: 2px solid var(--brand-border);
  color: var(--brand-accent); font-size: 1.4rem; border-radius: 10px;
  cursor: pointer; user-select: none; -webkit-user-select: none;
  touch-action: none; transition: background .08s, transform .08s, box-shadow .08s;
  box-shadow: 0 3px 0 rgba(0,0,0,.4), inset 0 1px 0 rgba(139,172,15,.1);
}
.dpad-btn:active {
  background: rgba(139,172,15,.2);
  transform: translateY(2px);
  box-shadow: 0 1px 0 rgba(0,0,0,.4);
}
.dpad-up    { grid-column: 2; grid-row: 1; }
.dpad-left  { grid-column: 1; grid-row: 2; }
.dpad-right { grid-column: 3; grid-row: 2; }
.dpad-down  { grid-column: 2; grid-row: 2; }

@media (min-width: 560px) { .dpad { display: none; } }

.hint { text-align: center; font-size: .65rem; color: var(--brand-muted); margin-top: .85rem; line-height: 1.6; }

/* ── Ko-fi / tip button ───────────────────────────────── */
.btn-coin {
  display: inline-flex; align-items: center; gap: .4rem;
  font-family: var(--font); font-size: .72rem; font-weight: 600;
  color: var(--lcd-dark); background: #f4d35e;
  border: none; padding: .65rem 1.1rem; border-radius: 999px;
  text-decoration: none; cursor: pointer;
  box-shadow: 0 0 0 2px rgba(15,56,15,.25), 0 4px 14px rgba(0,0,0,.25);
  animation: coin-bob 1.8s ease-in-out infinite;
}
.btn-coin:hover { animation-play-state: paused; transform: scale(1.06); }
@keyframes coin-bob {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50%       { transform: translateY(-4px) rotate(-3deg); }
}
.arcade-roadmap {
  font-size: .62rem; color: #c7eb8c; opacity: .8; line-height: 1.6; margin-top: .3rem;
}
.arcade-roadmap strong { color: var(--lcd-bg); text-shadow: 0 0 6px rgba(155,188,15,.5); }

/* ── Confetti ─────────────────────────────────────────── */
#confetti { position: absolute; inset: 0; pointer-events: none; overflow: hidden; border-radius: var(--radius); z-index: 50; }
.confetti-piece {
  position: absolute; top: -10%; font-size: 1.1rem;
  animation: confetti-fall 1.4s ease-in forwards;
}
@keyframes confetti-fall {
  0%   { transform: translateY(0) rotate(0deg);   opacity: 1; }
  100% { transform: translateY(340px) rotate(540deg); opacity: 0; }
}

/* ── Unlock progress track ───────────────────────────── */
.unlock-track { width: 100%; max-width: 360px; margin: 0 auto .75rem; }
.unlock-track-header {
  display: flex; justify-content: space-between; align-items: center;
  font-size: .67rem; color: var(--brand-muted); margin-bottom: .3rem;
}
.unlock-track-header strong { color: var(--brand-accent); }
.unlock-bar-wrap {
  height: 8px; background: var(--brand-surface); border-radius: 999px;
  border: 1px solid var(--brand-border); overflow: hidden;
}
.unlock-bar-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--brand-accent) 0%, #c7eb8c 50%, var(--brand-accent) 100%);
  background-size: 200% 100%;
  border-radius: 999px;
  transition: width .35s ease;
  animation: bar-shimmer 2.2s linear infinite;
}
@keyframes bar-shimmer {
  0%   { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}
.unlock-success {
  max-width: 360px; margin: 0 auto .75rem; text-align: center;
  font-size: .78rem; color: var(--brand-accent);
  background: rgba(139,172,15,.1); border: 1px solid rgba(139,172,15,.3);
  border-radius: var(--radius); padding: .5rem 1rem;
}

/* ── Game-over quip ──────────────────────────────────── */
.game-quip {
  font-size: .65rem; color: var(--brand-muted); text-align: center;
  font-style: italic; line-height: 1.5; margin-top: -.2rem;
}
.near-miss {
  display: none; font-size: .68rem; color: #f4d35e; text-align: center;
  margin-top: .2rem; line-height: 1.5;
}

/* ── Improvement 3: Leaderboard ──────────────────────── */
.leaderboard {
  width: 100%; border-top: 1px solid rgba(139,172,15,.2);
  padding-top: .6rem; margin-top: .15rem;
}
.lb-title {
  font-family: var(--font-heading); font-size: .5rem;
  color: var(--brand-muted); letter-spacing: 1px;
  margin-bottom: .45rem; text-align: center;
}
.lb-list {
  list-style: none; width: 100%;
  display: flex; flex-direction: column; gap: .2rem;
}
.lb-row {
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--font-heading); font-size: .55rem;
  color: var(--brand-text);
  background: rgba(139,172,15,.06); border-radius: 3px;
  padding: .3rem .55rem;
  counter-increment: lb-counter;
}
.lb-row::before {
  content: counter(lb-counter) ".";
  color: var(--brand-muted); min-width: 18px;
}
.lb-list { counter-reset: lb-counter; }
.lb-row.lb-top { background: rgba(139,172,15,.18); color: var(--lcd-bg); }
.lb-date { font-size: .48rem; color: var(--brand-muted); font-family: var(--font); }

/* ── Start screen — by JLR Dev ────────────────────────── */
.overlay-made-by { font-size: .6rem; color: var(--brand-muted); margin-top: -.15rem; }
.made-by-link    { color: var(--brand-accent); text-decoration: none; font-weight: 600; }
.made-by-link:hover { text-decoration: underline; }

/* ── Game-over — JLR Dev promo ────────────────────────── */
.jlrdev-promo {
  width: 100%; margin-top: .25rem;
  border-top: 1px solid rgba(139,172,15,.2); padding-top: .6rem;
  display: flex; flex-direction: column; align-items: center; gap: .4rem;
}
.jlrdev-promo-text { font-size: .6rem; color: var(--brand-muted); text-align: center; line-height: 1.5; }
.btn-jlrdev {
  font-family: var(--font); font-size: .67rem; font-weight: 700;
  color: var(--brand-accent); background: rgba(139,172,15,.1);
  border: 1px solid rgba(139,172,15,.3); border-radius: 999px;
  padding: .35rem .85rem; text-decoration: none; transition: background .15s;
}
.btn-jlrdev:hover { background: rgba(139,172,15,.22); }

/* ── Footer ──────────────────────────────────────────── */
.footer       { text-align: center; padding: .85rem .75rem; border-top: 1px solid var(--brand-border); display: flex; flex-direction: column; gap: .2rem; }
.footer-top   { font-size: .72rem; color: var(--brand-muted); }
.footer-brand { font-size: .65rem; color: var(--brand-muted); opacity: .75; }
.footer-link  { color: var(--brand-accent); text-decoration: none; font-weight: 600; }
.footer-link:hover { text-decoration: underline; }

/* ── Toast ───────────────────────────────────────────── */
#toast {
  position: fixed; bottom: 1.5rem; left: 50%; transform: translateX(-50%);
  background: var(--brand-surface); border: 1px solid var(--brand-border);
  color: var(--brand-text); padding: .75rem 1.25rem; border-radius: var(--radius);
  font-size: .9rem; box-shadow: var(--shadow); z-index: 9999;
  opacity: 0; transition: opacity .2s; pointer-events: none; white-space: nowrap;
}
#toast.show { opacity: 1; }

/* ── PWA install banner ───────────────────────────────── */
#install-banner {
  display: none; position: fixed; bottom: 0; left: 0; right: 0;
  background: var(--brand-surface); border-top: 1px solid var(--brand-accent);
  padding: 1rem 1.25rem; z-index: 200; align-items: center; gap: 1rem;
}
#install-banner.show { display: flex; }
#install-banner p { flex: 1; font-size: .9rem; }

/* ── Offline bar ─────────────────────────────────────── */
.offline-bar {
  background: var(--brand-warning); color: #000;
  text-align: center; padding: .4rem; font-size: .8rem; font-weight: 700; display: none;
}
body.offline .offline-bar { display: block; }

/* ── Utility ─────────────────────────────────────────── */
.btn { display: inline-flex; align-items: center; gap: .5rem; padding: .65rem 1.25rem; border-radius: var(--radius); font-family: var(--font-heading); font-weight: 700; font-size: .9rem; border: none; cursor: pointer; text-decoration: none; transition: opacity .15s, transform .1s; }
.btn:active         { transform: scale(.97); }
.btn-primary        { background: var(--brand-accent); color: #fff; }
.btn-primary:hover  { opacity: .88; }
.btn-ghost          { background: transparent; color: var(--brand-accent); border: 1px solid var(--brand-border); }
.btn-ghost:hover    { background: var(--brand-surface); }