/* =========================================================
   BLOG POST PAGE — HEADER BANNER
   ========================================================= */

.bp-banner {
  position: relative;
  padding: clamp(130px, 14vw, 175px) 0 clamp(44px, 6vw, 76px);
  background:
    radial-gradient(1100px 520px at 82% -20%, rgba(46, 90, 210, 0.14), transparent 60%),
    linear-gradient(180deg, #8ba2f6 0%, #eaeef8 100%);
  border-bottom: 1px solid #e1e7f4;
  overflow: hidden;
}

.bp-inner {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 64px);
}

.bp-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  font-family: "Inter", sans-serif;
  font-size: 14px;
  color: #5a5a64;
}

.bp-crumbs a {
  color: #1e72d1;
  text-decoration: none;
  transition: color 0.2s ease;
}

.bp-crumbs a:hover {
  color: #0f5bbd;
}

.bp-sep {
  color: #b6bdcc;
}

.bp-current {
  font-weight: 500;
  color: #5a5a64;
}

.bp-title {
  margin: 0;
  max-width: 920px;
  font-family: "Geist", "Inter", sans-serif;
  font-size: clamp(34px, 4.6vw, 60px);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: #17173a;
  text-wrap: balance;
}

.bp-title::after {
  content: "";
  display: block;
  width: 90px;
  height: 5px;
  margin-top: 22px;
  border-radius: 3px;
  background: linear-gradient(90deg, #1e72d1 0%, #87ceeb 100%);
}

.bp-back {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 30px;
  padding: 13px 26px;
  border-radius: 999px;

  background: #ffffff;
  color: #1b1464;
  border: 1px solid #d3dcf3;

  font-family: "Inter", sans-serif;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;

  box-shadow: 0 8px 20px rgba(40, 80, 200, 0.12);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.bp-back svg {
  width: 18px;
  height: 18px;
  transition: transform 0.25s ease;
}

.bp-back:hover {
  background: #1b1464;
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(40, 80, 200, 0.24);
}

.bp-back:hover svg {
  transform: translateX(-4px);
}

.bp-back:focus-visible {
  outline: 3px solid #1e72d1;
  outline-offset: 3px;
}

/* ---------- Responsive ---------- */

@media (max-width: 620px) {
  .bp-banner {
    padding-top: clamp(110px, 26vw, 150px);
  }

  .bp-crumbs {
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .bp-back,
  .bp-back svg {
    transition: none;
  }
}