/* Sayfa iskeleti: kapsayıcı, bölüm, header, footer, ızgaralar */
.kap { width: min(100% - 40px, var(--kap)); margin-inline: auto; }
.bolum { padding-block: var(--bosluk-bolum); }
.bolum--alt { background: var(--yuzey); border-block: 1px solid var(--kenar); }

.bolum-bas { max-width: 680px; margin-bottom: 56px; }
.bolum-bas p { color: var(--metin-soluk); margin-top: 16px; font-size: 1.1rem; }
.bolum-bas--orta { margin-inline: auto; text-align: center; }

.izgara { display: grid; gap: 20px; }
.izgara--4 { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.izgara--3 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.izgara--2 { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 56px; align-items: center; }

/* Header */
.header {
  position: fixed; inset: 0 0 auto; z-index: 50;
  transition: background var(--gecis), border-color var(--gecis);
  border-bottom: 1px solid transparent;
}
.header.kaydi { background: rgba(15, 17, 23, .85); backdrop-filter: blur(12px); border-color: var(--kenar); }
.header .kap { display: flex; align-items: center; justify-content: space-between; height: 72px; }

.logo { display: flex; align-items: center; gap: 10px; font-family: var(--font-baslik); font-weight: 700; font-size: 1.25rem; }
.logo b { color: var(--vurgu); font-weight: 700; }

.nav { display: flex; align-items: center; gap: 32px; }
.nav a:not(.btn) { color: var(--metin-soluk); font-size: .95rem; transition: color var(--gecis); }
.nav a:not(.btn):hover { color: var(--metin); }

.menu-btn { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.menu-btn span { display: block; width: 22px; height: 2px; background: var(--metin); margin: 5px 0; transition: transform var(--gecis), opacity var(--gecis); }

@media (max-width: 860px) {
  .menu-btn { display: block; }
  .nav {
    position: fixed; inset: 72px 0 auto; flex-direction: column; align-items: stretch; gap: 0;
    background: var(--yuzey); border-bottom: 1px solid var(--kenar); padding: 12px 20px 24px;
    transform: translateY(-120%); transition: transform var(--gecis);
  }
  .nav a:not(.btn) { padding: 14px 0; border-bottom: 1px solid var(--kenar); }
  .nav .btn { margin-top: 16px; }
  .menu-acik .nav { transform: none; }
  .menu-acik .menu-btn span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-acik .menu-btn span:nth-child(2) { opacity: 0; }
  .menu-acik .menu-btn span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* Footer */
.footer { border-top: 1px solid var(--kenar); padding-block: 40px; color: var(--metin-soluk); font-size: .9rem; }
.footer .kap { display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; align-items: center; }
.footer nav { display: flex; gap: 24px; }
.footer a:hover { color: var(--metin); }
.footer-ig { display: inline-flex; align-items: center; gap: 6px; }