:root {
  --bg: #f3f8fc;
  --bg-alt: #e8f2fa;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: #ffffff;
  --text: #163248;
  --muted: #5f778b;
  --line: rgba(18, 71, 106, 0.2);
  --accent: #0079ca;
  --accent-soft: rgba(0, 121, 202, 0.1);
  --shadow: 0 12px 38px rgba(13, 52, 80, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Avenir Next", "Avenir", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(1300px 700px at 0% -10%, #d9edfb 0%, transparent 60%),
    radial-gradient(1200px 750px at 100% 0%, #e8f4ff 0%, transparent 65%),
    linear-gradient(180deg, var(--bg), var(--bg-alt));
  line-height: 1.45;
  overflow-x: hidden;
}

.bg-graph {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.55;
  mix-blend-mode: multiply;
}

.bg-graph svg {
  width: 100%;
  height: 100%;
}

.page {
  position: relative;
  z-index: 1;
  max-width: 940px;
  margin: 0 auto;
  padding: 1.2rem 1.1rem 2rem;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  background: var(--surface);
  border: 1px solid rgba(10, 61, 98, 0.16);
  border-radius: 14px;
  padding: 0.7rem 0.95rem;
  box-shadow: var(--shadow);
  backdrop-filter: blur(4px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand img {
  width: 38px;
  height: 38px;
  object-fit: contain;
  border-radius: 8px;
  border: 1px solid rgba(20, 83, 128, 0.18);
  background: #fff;
  padding: 0.18rem;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

nav a {
  padding: 0.35rem 0.62rem;
  border-radius: 999px;
  border: 1px solid transparent;
  color: #205072;
  text-decoration: none;
  font-size: 0.92rem;
}

nav a:hover {
  background: var(--accent-soft);
  border-color: rgba(0, 121, 202, 0.32);
}

nav a.active {
  background: rgba(0, 121, 202, 0.14);
  border-color: rgba(0, 121, 202, 0.38);
  color: #0a436d;
}

.card {
  background: var(--surface-strong);
  border: 1px solid rgba(10, 61, 98, 0.14);
  border-radius: 15px;
  padding: 1.1rem;
  box-shadow: var(--shadow);
}

h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.15;
}

h2 {
  margin: 0 0 0.55rem;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #4f6d82;
}

p,
ul {
  margin: 0;
}

ul {
  padding-left: 1rem;
  display: grid;
  gap: 0.42rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.stack {
  display: grid;
  gap: 0.9rem;
}

a {
  color: var(--accent);
}

.micro {
  list-style: none;
  padding-left: 0;
  gap: 0.65rem;
}

.micro li {
  background: #f6fbff;
  border: 1px solid rgba(15, 78, 120, 0.14);
  border-radius: 10px;
  padding: 0.65rem 0.75rem;
}

.micro time {
  display: block;
  color: #527389;
  font-size: 0.8rem;
  margin-bottom: 0.16rem;
}

footer {
  margin-top: 0.85rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.84rem;
}

@media (max-width: 760px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }
}