:root {
  --purple: #7c3aed;
  --azure: #0ea5e9;

  --bg: #f1f5f9;
  --bg-alt: #eef2ff;
  --text: #020617;
  --card: #ffffff;
}

body.dark {
  --bg: #020617;
  --bg-alt: #020617;
  --text: #f8fafc;
  --card: #0f172a;
}

* {
  box-sizing: border-box;
  font-family: Inter, system-ui, sans-serif;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  transition: background 0.3s, color 0.3s;
}

/* NAVBAR */
.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--card);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 4px 20px rgba(0,0,0,.1);
  z-index: 10000;
}

.logo {
  font-weight: 900;
  font-size: 1.4rem;
  color: var(--purple);
}

.menu-btn {
  font-size: 1.6rem;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text);
}

/* MENU */
.menu {
  position: fixed;
  top: 70px;
  right: 20px;
  background: var(--card);
  border-radius: 14px;
  box-shadow: 0 20px 40px rgba(0,0,0,.2);
  min-width: 200px;
  display: flex;
  flex-direction: column;
  z-index: 9999;
}

.menu.hidden {
  display: none;
}

.menu a {
  padding: 1rem;
  cursor: pointer;
  font-weight: 600;
}

.menu a:hover {
  background: var(--bg-alt);
}

.menu hr {
  border: none;
  height: 1px;
  background: #c7d2fe;
}

/* HERO */
.hero {
  height: 100vh;
  background: linear-gradient(135deg, var(--purple), var(--azure));
  color: white;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

/* BUTTONS */
.btn {
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  font-weight: bold;
}

.primary {
  background: white;
  color: var(--purple);
}

.secondary {
  background: var(--azure);
  color: white;
}

/* SECTIONS */
section {
  padding: 6rem 2rem;
  text-align: center;
}

.features,
.games {
  background: var(--bg-alt);
}

.feature-grid,
.game-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px,1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.card,
.game-card {
  background: var(--card);
  padding: 2rem;
  border-radius: 20px;
  box-shadow: 0 15px 30px rgba(0,0,0,.15);
}

/* AUTH */
.auth input {
  display: block;
  width: 100%;
  max-width: 320px;
  margin: 0.6rem auto;
  padding: 0.7rem;
  border-radius: 8px;
  border: 1px solid #c7d2fe;
}

/* THEME TOGGLE */
.theme-toggle {
  margin: 1rem;
  padding: 0.6rem;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  font-weight: 600;
  background: linear-gradient(135deg, var(--purple), var(--azure));
  color: white;
}

/* FOOTER */
footer {
  background: var(--card);
  padding: 1.5rem;
}