/* -----------------------------
   Base Styling
-------------------------------- */
body {
  margin: 0;
  padding: 0;
  background: #f3f4f6;
  font-family: Arial, Helvetica, sans-serif;
  color: #111827;
}

#container {
  max-width: 1000px;
  margin: 30px auto;
  padding: 0 16px;
}

.card {
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

/* -----------------------------
   Header
-------------------------------- */
#header {
  padding: 22px;
  background: #111827;
  color: white;
  text-align: center;
}

.subtitle {
  margin: 10px auto 0 auto;
  max-width: 700px;
  line-height: 1.5;
}

/* -----------------------------
   Navigation
-------------------------------- */
.nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  padding: 14px;
  background: #e5e7eb;
}

.nav-link {
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 10px;
  background: white;
  color: #111827;
  border: 1px solid #d1d5db;
}

.nav-link:hover {
  background: #f9fafb;
}

/* -----------------------------
   Layout Grid
-------------------------------- */
#content {
  padding: 18px;
}

.layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 18px;
  align-items: start;
}

/* -----------------------------
   Sections
-------------------------------- */
.section {
  border: 1px solid #e5e7eb;
  background: #ffffff;
  border-radius: 12px;
  padding: 16px;
}

.section h2 {
  margin-top: 0;
}

.article {
  margin-top: 12px;
}

h3 {
  margin-bottom: 8px;
}

/* -----------------------------
   Aside
-------------------------------- */
.aside {
  border: 1px solid #e5e7eb;
  background: #ffffff;
  border-radius: 12px;
  padding: 16px;
}

/* -----------------------------
   Links
-------------------------------- */
.links {
  padding-left: 18px;
  margin-top: 8px;
}

.links li {
  margin: 6px 0;
}

.links a {
  color: #1d4ed8;
}

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

/* -----------------------------
   Image + Button
-------------------------------- */
.profile-pic {
  display: block;
  max-width: 220px;
  width: 100%;
  height: auto;
  margin: 12px auto;
  border-radius: 12px;
  border: 1px solid #e5e7eb;
}

.center {
  text-align: center;
}

.btn {
  display: inline-block;
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 10px;
  background: #111827;
  color: white;
}

.btn:hover {
  opacity: 0.9;
}

/* -----------------------------
   Footer
-------------------------------- */
.footer {
  text-align: center;
  padding: 14px;
  background: #111827;
  color: white;
}

/* -----------------------------
   Responsive
-------------------------------- */
@media (max-width: 800px) {
  .layout {
    grid-template-columns: 1fr;
  }
}