:root {
  /* Paleta de cores - Tema de céu */
  --sky-top: #8ad7ff;
  --sky-middle: #b6efff;
  --sky-bottom: #f7e7a8;
  
  /* Tons de texto e elementos */
  --ink: #10324b;
  --ink-soft: #31536d;
  
  /* Fundos translúcidos com blur */
  --panel: rgba(11, 32, 49, 0.8);
  --panel-border: rgba(255, 255, 255, 0.18);
  --card: rgba(255, 255, 255, 0.68);
  --card-border: rgba(16, 50, 75, 0.08);
  
  /* Tipografia sobre fundo escuro */
  --text-on-dark: #f5fbff;
  
  /* Cores de ação e destaque */
  --accent: #ff8d3f;
  --accent-deep: #d96015;
  
  /* Sombras para profundidade */
  --shadow-lg: 0 30px 80px rgba(17, 39, 58, 0.22);
  --shadow-md: 0 18px 42px rgba(17, 39, 58, 0.16);
}

/**
 * Reset e base
 */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Fredoka", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.65), transparent 28%),
    radial-gradient(circle at bottom right, rgba(255, 214, 126, 0.38), transparent 26%),
    linear-gradient(180deg, var(--sky-top), var(--sky-middle) 52%, var(--sky-bottom));
}

/**
 * Layout principal com CSS Grid
 * 2 colunas: hero content + game canvas
 * Responsivo em mobile (stacked)
 */
.layout {
  width: min(1120px, calc(100% - 32px));
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(280px, 1fr) minmax(320px, 460px);
  gap: 36px;
  align-items: center;
  padding: 28px 0;
}

.hero {
  padding: 12px 0;
}

/**
 * Tipografia de rótulos (eyebrow text)
 * Pequenos, uppercase, com letter-spacing para destaque
 */
.eyebrow,
.brand-kicker,
.panel-kicker,
.info-label {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.75rem;
  font-weight: 700;
}

.hero h1,
.brand h2 {
  margin: 8px 0 0;
  line-height: 0.92;
}

.hero h1 {
  max-width: 6ch;
  font-size: clamp(3.4rem, 10vw, 6.2rem);
}

.lead {
  max-width: 560px;
  margin: 18px 0 0;
  color: var(--ink-soft);
  font-size: 1.12rem;
  line-height: 1.6;
}

.hero-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 26px;
}

.info-card,
.score-card {
  border: 1px solid var(--card-border);
  background: var(--card);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
}

.info-card {
  padding: 18px;
  border-radius: 24px;
}

.info-card strong {
  display: block;
  margin-top: 10px;
  font-size: 1.12rem;
}

.info-card p {
  margin: 8px 0 0;
  color: var(--ink-soft);
  line-height: 1.5;
}

.feature-list {
  margin: 24px 0 0;
  padding-left: 18px;
  color: var(--ink-soft);
  line-height: 1.8;
}

.game-column {
  position: relative;
}

/**
 * HUD (Heads-Up Display)
 * Contém marca e placar do jogo
 */
.hud {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 18px;
  margin-bottom: 18px;
}

.brand h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
}

.scoreboard {
  display: flex;
  gap: 12px;
}

.score-card {
  min-width: 118px;
  padding: 12px 16px;
  border-radius: 20px;
  text-align: center;
}

.score-card span {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--ink-soft);
}

.score-card strong {
  display: block;
  margin-top: 4px;
  font-size: 2rem;
  line-height: 1;
}

.game-stage {
  position: relative;
  overflow: hidden;
  border-radius: 30px;
  box-shadow: var(--shadow-lg);
}

/**
 * Canvas principal de renderização do jogo
 */
canvas {
  display: block;
  width: 100%;
  height: auto;
  background: transparent;
}

/**
 * Overlay modal para menus e game over
 * Possui transição suave e efeito blur de fundo
 */
.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  background: linear-gradient(180deg, rgba(9, 29, 46, 0.16), rgba(9, 29, 46, 0.48));
  transition: opacity 180ms ease;
}

.overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.panel {
  width: min(100%, 328px);
  padding: 24px;
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  background: var(--panel);
  color: var(--text-on-dark);
  text-align: center;
  backdrop-filter: blur(14px);
}

.panel h3 {
  margin: 8px 0 12px;
  font-size: 1.95rem;
}

.panel p {
  margin: 0 0 18px;
  line-height: 1.5;
}

/**
 * Botões com gradiente e efeito de sombra
 * Hover/active animations para feedback tátil
 */
button {
  border: 0;
  border-radius: 999px;
  padding: 14px 24px;
  font: inherit;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(180deg, var(--accent), var(--accent-deep));
  box-shadow: 0 14px 28px rgba(217, 96, 21, 0.28);
  cursor: pointer;
  transition: transform 140ms ease, filter 140ms ease;
}

button:hover {
  filter: brightness(1.04);
  transform: translateY(-1px);
}

button:active {
  transform: translateY(1px);
}

.game-footer {
  margin-top: 14px;
  padding: 0 4px;
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.5;
}

@media (max-width: 960px) {
  /* Layout tablet: empilha hero e game na vertical */
  .layout {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 20px 0 28px;
  }

  .hero h1 {
    max-width: none;
  }
}

@media (max-width: 640px) {
  /* Layout mobile: ajusta espaçamento e stacking */
  .layout {
    width: min(100% - 20px, 1120px);
  }

  .hero-cards {
    grid-template-columns: 1fr;
  }

  .hud {
    flex-direction: column;
    align-items: start;
  }

  .scoreboard {
    width: 100%;
  }

  .score-card {
    flex: 1;
  }
}