:root {
  --bg-color: #0f172a;
  --card-bg: rgba(30, 41, 59, 0.7);
  --accent-color: #6366f1;
  --accent-hover: #818cf8;
  --text-main: #f8fafc;
  --text-sub: #94a3b8;
  --border-color: rgba(255, 255, 255, 0.1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow-x: hidden;
  position: relative;
}

/* Tło z pulsującą poświatą */
.background-glow {
  position: absolute;
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.35) 0%, rgba(0, 0, 0, 0) 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: -1;
  animation: pulse 8s infinite alternate ease-in-out;
}

/* Główny kontener */
.container {
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 2.5rem 2rem;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  text-align: center;
  animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.header h1 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

/* Lista przycisków */
.main-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.link-card {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.25rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-main);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.25s ease;
}

/* Animacje hover dla przycisków */
.link-card:hover {
  background: var(--accent-color);
  border-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
}

.link-card:active {
  transform: translateY(0);
}

.divider {
  height: 1px;
  background: var(--border-color);
  margin: 0.5rem 0;
}

/* Stopka */
.footer {
  margin-top: 2rem;
  font-size: 0.85rem;
  color: var(--text-sub);
}

.footer a {
  color: var(--accent-hover);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer a:hover {
  text-decoration: underline;
}

/* Kluczowe animacje */
@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  from {
    transform: translate(-50%, -50%) scale(0.9);
    opacity: 0.6;
  }
  to {
    transform: translate(-50%, -50%) scale(1.2);
    opacity: 1;
  }
}