/* ==========================================================
   CSINSS - üst banner ve menü çubuğu
   style.css'ten SONRA yüklenir.
   ========================================================== */

:root {
  --csinss-navy-1: #1b2547;
  --csinss-navy-2: #23396b;
  --csinss-nav:    #151d38;
  --csinss-teal:   #2bb5a0;
  --csinss-sub:    #c9cff2;
  --csinss-muted:  #d6dae6;
}

/* ---------- Banner ---------- */
.site-banner {
  background:
    url("../img/skyrmion-field.svg") right center / auto 100% no-repeat,
    linear-gradient(120deg, var(--csinss-navy-1) 0%, var(--csinss-navy-2) 100%);
  color: #fff;
  overflow: hidden;
}
.site-banner .banner-inner {
  display: flex;
  align-items: center;
  min-height: 240px;
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
}
.banner-brand {
  display: flex;
  align-items: center;
  gap: 2rem;
  color: inherit;
  text-decoration: none;
}
.banner-brand:hover { color: inherit; text-decoration: none; }
.banner-logo { width: 150px; height: 150px; flex: none; }
.banner-text { display: flex; flex-direction: column; line-height: 1.15; }

.banner-inst {
  font-family: "Poppins", "Helvetica Neue", Arial, sans-serif;
  font-weight: 400;
  font-size: 1.15rem;
  color: var(--csinss-muted);
  margin-bottom: .2rem;
}
.banner-title {
  font-family: "Poppins", "Helvetica Neue", Arial, sans-serif;
  font-weight: 800;
  font-size: 4.6rem;
  letter-spacing: .05em;
  line-height: 1;
  color: #fff;
}
.banner-sub {
  font-family: "Poppins", "Helvetica Neue", Arial, sans-serif;
  font-weight: 500;
  font-size: 1.85rem;
  color: var(--csinss-sub);
  margin-top: .35rem;
}
.banner-url {
  font-family: "Poppins", "Helvetica Neue", Arial, sans-serif;
  font-weight: 500;
  font-size: 1.6rem;
  color: var(--csinss-teal);
  margin-top: .25rem;
}

/* ---------- Menü çubuğu (style.css'teki büyük .navbar ayarlarını geçersiz kılar) ---------- */
.navbar.site-nav {
  background: var(--csinss-nav);
  min-height: 0;
  padding-top: .35rem;
  padding-bottom: .35rem;
  font-size: 1.05rem;
  border-top: 1px solid rgba(255, 255, 255, .06);
}
.navbar.site-nav .nav-link { color: rgba(255, 255, 255, .78); }
.navbar.site-nav .nav-link.active { color: #fff; font-weight: 600; }
.navbar.site-nav .nav-link:hover { color: #ffc107 !important; }

/* ---------- Duyarlı (responsive) ayarlar ---------- */
@media (max-width: 1199.98px) {
  .banner-title { font-size: 3.8rem; }
  .banner-sub   { font-size: 1.5rem; }
  .banner-url   { font-size: 1.35rem; }
  .banner-logo  { width: 128px; height: 128px; }
}
@media (max-width: 1399.98px) {
  /* Dar ekranlarda alan yazının arkasına girer: yazı tarafı koyulaştırılır */
  .site-banner {
    background:
      linear-gradient(90deg, rgba(27, 37, 71, .97) 0%, rgba(27, 37, 71, .88) 45%, rgba(35, 57, 107, .25) 80%, rgba(35, 57, 107, 0) 100%),
      url("../img/skyrmion-field.svg") right center / auto 100% no-repeat,
      linear-gradient(120deg, var(--csinss-navy-1) 0%, var(--csinss-navy-2) 100%);
  }
}
@media (max-width: 991.98px) {
  .site-banner {
    background:
      linear-gradient(90deg, rgba(27, 37, 71, .96) 0%, rgba(27, 37, 71, .80) 55%, rgba(35, 57, 107, .35) 100%),
      url("../img/skyrmion-field.svg") right center / auto 100% no-repeat,
      linear-gradient(120deg, var(--csinss-navy-1) 0%, var(--csinss-navy-2) 100%);
  }
  .site-banner .banner-inner { min-height: 190px; }
  .banner-brand { gap: 1.4rem; }
  .banner-logo  { width: 104px; height: 104px; }
  .banner-inst  { font-size: 1rem; }
  .banner-title { font-size: 3.1rem; }
  .banner-sub   { font-size: 1.25rem; }
  .banner-url   { font-size: 1.15rem; }
}
@media (max-width: 575.98px) {
  .site-banner { background: linear-gradient(120deg, var(--csinss-navy-1) 0%, var(--csinss-navy-2) 100%); }
  .site-banner .banner-inner { min-height: 0; padding-top: 1.1rem; padding-bottom: 1.1rem; }
  .banner-brand { gap: .9rem; }
  .banner-logo  { width: 68px; height: 68px; }
  .banner-inst  { font-size: .78rem; }
  .banner-title { font-size: 2.2rem; }
  .banner-sub   { font-size: .92rem; }
  .banner-url   { display: none; }
}