/* Ortak taban — her bölüm eklentisi kendi içinde taşır, bağımsız çalışır */
.oos-sayfa {
  --oos-navy: #0b2a4a;
  --oos-blue: #1868db;
  --oos-teal: #0ea394;
  --oos-ink: #10233d;
  --oos-ink-soft: #55677f;
  --oos-bg: #ffffff;
  --oos-bg-alt: #f6f8fb;
  --oos-card: #ffffff;
  --oos-line: #e4e9f0;
  --oos-radius: 14px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Inter", Arial, sans-serif;
  color: var(--oos-ink);
  line-height: 1.55;
}
.oos-sayfa *,
.oos-sayfa *::before,
.oos-sayfa *::after { box-sizing: border-box; }
.oos-sayfa img { max-width: 100%; display: block; }
.oos-container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
.oos-section { padding: 72px 0; }
.oos-section--alt { background: var(--oos-bg-alt); }
.oos-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--oos-teal); margin: 0 0 12px;
}
.oos-h2 {
  font-size: clamp(24px, 3vw, 32px); font-weight: 800; line-height: 1.25;
  letter-spacing: -0.01em; color: var(--oos-navy); margin: 0 0 14px;
}
.oos-lead { font-size: 16.5px; color: var(--oos-ink-soft); max-width: 640px; margin: 0; }
.oos-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 24px; border-radius: 10px; font-weight: 700; font-size: 15px;
  text-decoration: none; border: 1px solid transparent; cursor: pointer;
  transition: transform .15s ease, background .15s ease, border-color .15s ease, color .15s ease;
}
.oos-btn--primary { background: var(--oos-navy); color: #fff; }
.oos-btn--primary:hover { transform: translateY(-1px); background: #0f3560; }
.oos-btn--ghost { background: transparent; color: var(--oos-navy); border-color: var(--oos-line); }
.oos-btn--ghost:hover { border-color: var(--oos-blue); color: var(--oos-blue); }

@media (max-width: 560px) {
  .oos-section { padding: 48px 0; }
}
@media (prefers-reduced-motion: reduce) {
  .oos-sayfa * { transition: none !important; }
}

/* ---------- NEDEN BU SİSTEM ---------- */
.oos-neden { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.oos-neden__liste { margin: 22px 0 0; padding: 0; list-style: none; }
.oos-neden__liste li { position: relative; padding-left: 22px; margin-bottom: 12px; font-size: 15.5px; color: var(--oos-ink); }
.oos-neden__liste li::before {
  content: ""; position: absolute; left: 0; top: 9px; width: 8px; height: 8px;
  border-radius: 2px; background: var(--oos-teal);
}
.oos-neden__gorsel img { width: 100%; border-radius: var(--oos-radius); border: 1px solid var(--oos-line); }
.oos-neden__placeholder {
  border: 1.5px dashed var(--oos-line); border-radius: var(--oos-radius); min-height: 260px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px;
  color: #a7b3c4; background: var(--oos-bg-alt); text-align: center; padding: 24px; font-size: 13px;
}

@media (max-width: 900px) {
  .oos-neden { grid-template-columns: 1fr; }
  .oos-neden__gorsel { order: -1; }
}