html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: Roboto, sans-serif;
  color: #000;
  line-height: 1.2em;
}

/* Background images with 30% opacity (keeps text fully opaque) */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  opacity: 0.3;
}

/* Correct backgrounds per page */
body[data-page="home"]::before {
  background-image: url("../images/background.jpg");
}

body[data-page="portfolio"]::before {
  background-image: url("../images/page2bg.jpg");
}

body[data-page="contact"]::before {
  background-image: url("../images/page3bg.jpg");
}

/* Layout wrapper */
body > div {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  box-sizing: border-box;
}

/* Sidebar: white background, rounded, ~25% width */
aside {
  flex: 0 0 25%;
  background: #fff;
  border-radius: 14px;
  padding: 12px;
  box-sizing: border-box;
  align-self: flex-start;
}

aside h2 {
  margin: 0 0 8px 0;
  font-size: 1.1rem;
}

nav a {
  display: block;
  color: #000;
  text-decoration: none;
  padding: 8px 10px;
  border-radius: 10px;
  margin: 6px 0;
}

nav a:hover,
nav a:focus {
  background: rgba(0, 0, 0, 0.06);
}

/* Main content area */
main {
  flex: 1 1 70%;
  min-width: 280px;
}

/* Header */
header {
  margin-bottom: 12px;
}

header h1 {
  margin: 0 0 8px 0;
  font-size: 2rem;
}

/* Title border image on HOME */
body[data-page="home"] header h1 img {
  float: left;
  width: 52px;
  height: auto;
  margin: 0 10px 0 0;
}

/* Contact hero image */
body[data-page="contact"] header img {
  width: 100%;
  height: auto;
  display: block;
  margin-top: 12px;
  border-radius: 12px;
}

/* Content blocks */
main > div {
  background: #fff;
  border-radius: 14px;
  padding: 10px;
  margin-bottom: 10px;
  box-sizing: border-box;
}

main > div h3 {
  margin: 0 0 8px 0;
}

/* Form styling */
form {
  max-width: 520px;
  margin: 0 auto;
}

input, textarea {
  width: 100%;
  box-sizing: border-box;
  padding: 10px;
  border-radius: 10px;
  border: 1px solid #999;
  font: inherit;
  margin-top: 6px;
  background: #fff;
  color: #000;
}

button {
  width: 100%;
  padding: 12px;
  border: 0;
  border-radius: 12px;
  background: #000;
  color: #fff;
  font: inherit;
  cursor: pointer;
}

button:hover,
button:focus {
  opacity: 0.9;
}

/* Footer spans full width under main content */
footer {
  margin-top: 8px;
}

/* Responsive: sidebar drops to bottom */
@media (max-width: 820px) {
  body > div {
    flex-direction: column;
  }

  aside {
    width: 100%;
    flex: 0 0 auto;
    order: 2;
  }

  main {
    order: 1;
  }

  body[data-page="home"] header h1 img {
    float: none;
    display: inline-block;
    vertical-align: middle;
    margin: 0 10px 6px 0;
  }
}