/* ===== RESET ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

/* ===== BODY ===== */
body {
  background: #f4f6f9;
  color: #333;
}

/* ===== NAVBAR ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;

  display: flex;
  justify-content: space-between;
  align-items: center;

  padding: 15px 20px;
  background: white;
  border-bottom: 1px solid #ddd;

  position: sticky;
  top: 0;
  z-index: 1000;
}

.logo {
  font-size: 20px;
  font-weight: bold;
}

/* ===== HAMBURGER ===== */
.hamburger {
  cursor: pointer;
}

.hamburger span {
  display: block;
  width: 25px;
  height: 3px;
  background: #333;
  margin: 5px 0;
}

/* ===== MOBILE MENU ===== */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 70%;
  height: 100%;

  background: white;

  display: flex;
  flex-direction: column;
  padding-top: 60px;

  transition: right 0.3s ease;
}

.mobile-menu a {
  padding: 15px 20px;
  text-decoration: none;
  color: #333;
  border-bottom: 1px solid #eee;
}

.mobile-menu.open {
  right: 0;
}

/* ===== OVERLAY ===== */
.menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.3);
  display: none;
}

.menu-overlay.show {
  display: block;
}

/* ===== MAIN ===== */
.container {
  padding: 20px;
}

/* ===== CARD ===== */
.card {
  background: white;
  margin: 20px auto;
  padding: 20px;
  max-width: 500px;

  border-radius: 15px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);

  text-align: center;
}

.card h1,
.card h2 {
  margin-bottom: 10px;
}

.card p {
  color: #555;
  font-size: 14px;
}

/* ===== BUTTON ===== */
.button-group {
  margin-top: 15px;
}

.btn {
  display: inline-block;
  padding: 10px 18px;
  margin: 5px;

  border-radius: 20px;
  text-decoration: none;

  background: #4CAF50;
  color: white;

  transition: 0.2s;
}

.btn:hover {
  background: #43a047;
}

/* ===== COUNTER ===== */
.counter {
  text-align: center;
  font-size: 32px;
  color: #4CAF50;
  margin-top: 20px;
}

/* ===== DESKTOP ===== */
@media (min-width: 768px) {
  .hamburger {
    display: none;
  }

  .mobile-menu {
    display: none;
  }
}