:root {
  --bg-dark: #0f1216;
  --card-bg: #1a1e24;
  --neon-blue: #00d2ff;
  --neon-green: #3fff00;
}

body {
  margin: 0;
  background-color: var(--bg-dark);
  color: white;
  font-family: "Oswald", sans-serif;
  scroll-behavior: smooth;
}

.navbar {
  display: flex;
  justify-content: space-between;
  padding: 20px 5%;
  align-items: center;
  background: rgba(15, 18, 22, 0.95);
  position: fixed;
  width: 90%;
  z-index: 1000;
}

.logo {
  font-family: "Orbitron", sans-serif;
  font-size: 24px;
  letter-spacing: 2px;
}

.logo span {
  color: var(--neon-blue);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 30px;
}

.nav-links a {
  color: white;
  text-decoration: none;
  text-transform: uppercase;
}

.hero {
  height: 100vh;
  /* Нова картинка: Атмосферний зал з контрастним світлом */
  background:
    linear-gradient(rgba(0, 0, 0, 0.6), rgba(15, 18, 22, 0.9)),
    url("https://images.unsplash.com/photo-1540497077202-7c8a3999166f?q=80&w=1920")
      no-repeat center/cover;
  background-attachment: fixed; /* Ефект паралаксу */
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* Додамо легке пульсуюче світіння на фон, щоб він "дихав" */
.hero::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(
    circle at center,
    rgba(0, 210, 255, 0.05) 0%,
    transparent 70%
  );
  animation: pulse 8s infinite alternate;
  pointer-events: none;
}

@keyframes pulse {
  0% {
    opacity: 0.3;
  }
  100% {
    opacity: 0.7;
  }
}

.hero-content h1 {
  font-size: 5rem; /* Збільшив шрифт для більшого впливу */
  font-family: "Orbitron", sans-serif;
  letter-spacing: 5px;
  line-height: 1.1;
  text-transform: uppercase;
}

.hero h1 {
  font-size: 4rem;
  font-family: "Orbitron";
  margin: 0;
}
.hero h1 span {
  color: var(--neon-blue);
  text-shadow: 0 0 20px var(--neon-blue);
}

.grid-plans {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  padding: 50px 5%;
}

.plan-card {
  background: var(--card-bg);
  padding: 40px;
  border-radius: 15px;
  text-align: center;
  border: 1px solid #333;
  transition: 0.4s;
}

.plan-card:hover {
  border-color: var(--neon-blue);
  transform: scale(1.05);
}

.featured {
  border: 2px solid var(--neon-blue);
  position: relative;
}
.label {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--neon-blue);
  padding: 5px 15px;
  border-radius: 20px;
  font-size: 12px;
}

.bmi-section {
  padding: 100px 5%;
  background: #14181f;
}
.bmi-container {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

input {
  padding: 15px;
  background: #222;
  border: 1px solid #444;
  color: white;
  border-radius: 5px;
  margin: 10px;
}

button {
  background: var(--neon-blue);
  border: none;
  padding: 15px 30px;
  font-weight: bold;
  cursor: pointer;
  border-radius: 5px;
  transition: 0.3s;
}

button:hover {
  box-shadow: 0 0 20px var(--neon-blue);
}