body {
    font-family: 'Inter', 'Segoe UI', Arial, sans-serif;
    font-weight: 400;
    background: linear-gradient(120deg, #232526 0%, #414345 100%);
    background-repeat: no-repeat;
    background-size: cover;
    min-height: 100vh;
    color: #eaeaea;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 32px;
    background-color: rgba(44, 44, 54, 0.85);
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    border-radius: 12px;
    margin: 24px 32px 32px 32px;
}

button {
    background: #5fa8ff;
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 0.6em 1.2em;
    font-size: 1rem;
    font-family: inherit;
    cursor: pointer;
    transition: transform 0.1s;
    outline: none;
    font-weight: 500;
    letter-spacing: 0.02em;
}

button:hover, button:focus {
    background: #8ecaff;
    transform: translateY(-1px) scale(1.02);
}

button:active {
    background: #3a7bd5;
}

@media (max-width: 600px) {
  body {
    font-size: 0.95rem;
    padding: 0 4px;
  }
  header {
    flex-direction: column;
    padding: 12px 8px;
    margin: 12px 4px 16px 4px;
    border-radius: 8px;
  }
  button {
    width: 100%;
    padding: 0.7em 0.8em;
    font-size: 1rem;
  }
}