:root {
  --background: #e7f2fb;
  --surface: #f8fbff;
  --text: #1f3d5a;
  --muted: #4d6d8c;
  --accent: #4a90e2;
  --accent-strong: #2f6bb5;
  --border: rgba(47, 107, 181, 0.18);
}

* {
  box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: linear-gradient(180deg, #f3f8ff 0%, #e7f2fb 100%);
    color: var(--text);
    font-family:
    Inter,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
    line-height: 1.7;
    padding: 2rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.container {
    display: flex;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.sidebar {
    flex-shrink: 0;
    width: 250px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 1.5rem;
    box-shadow: 0 8px 24px rgba(31, 61, 90, 0.08);
    height: fit-content;
    position: sticky;
    top: 2rem;
}

.sidebar h3 {
    color: var(--accent-strong);
    font-size: 1.2rem;
    margin-top: 0;
    margin-bottom: 1.5rem;
    border-bottom: 2px solid var(--accent);
    padding-bottom: 0.75rem;
}

.contact-item {
    margin-bottom: 1.5rem;
}

.contact-item:last-child {
    margin-bottom: 0;
}

.contact-item strong {
    color: var(--accent);
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.contact-item p {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.contact-item a {
    display: block;
    color: var(--accent-strong);
    text-decoration: none;
    word-break: break-all;
}

.contact-item a:hover {
    text-decoration: underline;
}

.main-content {
    flex: 1;
    min-width: 0;
}

.main-content > * {
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

header {
  margin-bottom: 2rem;
}

nav ul {
  display: flex;
  list-style: none;
  padding: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 8px 24px rgba(31, 61, 90, 0.08);
}

nav li {
  margin: 0;
}

nav a {
  display: block;
  padding: 1rem 1.3rem;
  color: var(--accent-strong);
  text-decoration: none;
}

nav a:hover {
  background: var(--background);
  text-decoration: underline;
}

@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        position: static;
    }
}

h1 {
  font-size: clamp(2.4rem, 2.2rem + 0.8vw, 3.4rem);
  margin-bottom: 0.5rem;
  color: var(--accent-strong);
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(1.4rem, 1.2rem + 0.5vw, 1.8rem);
  color: var(--accent);
  margin-top: 2rem;
  margin-bottom: 0.8rem;
}

ul,
ol {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1rem 1.3rem;
  margin: 0;
  color: var(--muted);
  box-shadow: 0 8px 24px rgba(31, 61, 90, 0.08);
}

li {
  margin-bottom: 0.75rem;
  padding-left: 0.35rem;
}

li:last-child {
  margin-bottom: 0;
}

ul {
  list-style-type: disc;
}

ol {
  list-style-type: decimal;
}

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

a:hover {
  text-decoration: underline;
}