/*===========base.css===========*/
/* ================= GLOBAL RESET ================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ================= BODY ================= */
body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: #f8fafc;
  color: #0f172a;
  line-height: 1.6;

  /* Space for fixed header & footer */
  padding-top: 64px;
  padding-bottom: 80px;
}

/* ================= CONTAINER ================= */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 18px;
}

/* ================= LINKS ================= */
a {
  color: #2563eb;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ================= FIXED HEADER ================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 64px;
  background: #0f172a;
  color: #ffffff;
  z-index: 1000;
}

/* ================= FIXED FOOTER ================= */
.site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 56px;
  background: #0f172a;
  color: #cbd5e1;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

/* ================= PAGE SPACING ================= */
.page-topics {
  margin-top: 32px;
  margin-bottom: 96px; /* bigger than footer */
}