:root {
  --bg: #0f1226;
  --panel: #171a35;
  --accent: #6c8cff;
  --accent-soft: rgba(108,140,255,0.15);
  --text: #e9ecff;
  --muted: #b8bce6;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Inter", system-ui, sans-serif;
  background: radial-gradient(circle at top, #1b1f45, var(--bg));
  color: var(--text);
  line-height: 1.65;
}

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

img {
  max-width: 100%;
  border-radius: 12px;
  margin: 12px 0;
}

.layout {
  max-width: 1200px;
  margin: auto;
  padding: 24px;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
}

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
}

.card {
  background: linear-gradient(145deg, var(--panel), #12142b);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

header.hero {
  grid-column: 1 / -1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  background: linear-gradient(135deg, #20255a, #111331);
}

header.hero h1 {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2.3rem);
}

nav a { font-weight: 500; }

/* Sidebar */

.profile { text-align: center; }

.avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 3px solid var(--accent);
  object-fit: cover;
  margin-bottom: 12px;
}

.profile p { color: var(--muted); font-size: 0.95rem; }

.donate-box {
  margin-top: 16px;
  padding: 14px;
  border-radius: 14px;
  background: var(--accent-soft);
  font-size: 0.9rem;
}

.donate-box form { margin-top: 8px; text-align: center; }

/* Content */

main h2 {
  margin-top: 40px;
  font-size: 1.4rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding-bottom: 6px;
}

main h3 { color: #ffd27f; }

.toc {
  background: var(--accent-soft);
  padding: 16px;
  border-radius: 14px;
  line-height: 1.8;
}

.muted { color: var(--muted); }

.backtop {
  margin: 16px 0 0;
  font-size: 0.9rem;
}

footer {
  text-align: center;
  padding: 24px;
  color: var(--muted);
  font-size: 0.9rem;
}