/* ===== Reset i podstawy ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
    Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
}

img, svg {
  max-width: 100%;
  display: block;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: 100%;
  line-height: 1.15;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ===== Zmienne CSS — Dark Mode ===== */
:root {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-card: #0f3460;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0b0;
  --accent: #e94560;
  --accent-hover: #ff6b7a;
  --border: #2a2a4a;
  --shadow: rgba(0, 0, 0, 0.3);
  --success: #4caf50;
  --warning: #ff9800;
  --danger: #f44336;
  --radius: 8px;
  --max-width: 800px;
}

/* ===== Layout ===== */
body {
  display: flex;
  flex-direction: column;
}

header {
  text-align: center;
  padding: 2rem 1rem 1rem;
}

header h1 {
  font-size: 1.75rem;
  color: var(--accent);
}

.subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

main {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem;
}

section {
  margin-bottom: 2rem;
}

section h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
}

footer {
  text-align: center;
  padding: 1rem;
  color: var(--text-secondary);
  font-size: 0.8rem;
  border-top: 1px solid var(--border);
}

/* ===== Responsywność ===== */
@media (min-width: 600px) {
  header h1 {
    font-size: 2rem;
  }

  main {
    padding: 2rem;
  }
}

/* ===== Utility (do użycia w JS) ===== */
.hidden {
  display: none !important;
}