:root {
  --primary: #101848;
  --secondary: #182050;
  --green: #101840;
  --green-light: #eef1f8;
  --grey-lighter: #e4e7ee;
  --grey: #5e6578;
  --yellow: #c45048;
  --white: #ffffff;
  --font: "Poppins", "Segoe UI", system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--primary);
  background: var(--white);
}
a { color: var(--secondary); text-decoration: none; }
a:hover { color: var(--green); }
strong { font-weight: 600; }
.skip {
  position: absolute;
  left: 12px;
  top: -40px;
  background: #fff;
  padding: 6px 10px;
}
.skip:focus { top: 8px; }
.container { max-width: 900px; margin: 0 auto; padding: 0 24px; }

header { background: var(--white); border-bottom: 1px solid var(--grey-lighter); }
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
}
.nav-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.nav-logo-icon,
.footer-logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--secondary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
}
.nav-logo-text { font-size: 1.35rem; font-weight: 700; color: var(--primary); }
.nav-links { display: flex; flex-wrap: wrap; list-style: none; margin: 0; padding: 0; gap: 4px; }
.nav-links li { position: relative; }
.nav-underline {
  position: absolute;
  left: 0;
  bottom: 2px;
  z-index: 1;
  height: 0;
  width: 100%;
  background: var(--yellow);
  opacity: .9;
  transition: height .2s;
}
.nav-links li:hover .nav-underline { height: 8px; }
.nav-links a {
  position: relative;
  z-index: 2;
  display: block;
  padding: 4px 8px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--primary);
}
.nav-links li:hover a { color: var(--green); }
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  margin-left: auto;
  padding: 0;
  border: 1px solid var(--grey-lighter);
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--primary);
}

.intro-section { padding: 56px 0 48px; border-bottom: 1px solid var(--grey-lighter); }
h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 600;
  line-height: 1.15;
  color: var(--primary);
}
.intro-desc {
  max-width: 640px;
  margin: 0 0 14px;
  font-size: 1.12rem;
  font-weight: 300;
}
.intro-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 0 0 28px;
  font-size: .8rem;
  color: var(--grey);
}
.cta-btn {
  display: inline-block;
  background: var(--secondary);
  color: #fff;
  font-weight: 600;
  font-size: 1.05rem;
  padding: 14px 32px;
}
.cta-btn:hover { background: var(--green); color: #fff; }

.section-block { padding: 48px 0 64px; }
.sec-head { margin: 36px 0 8px; }
.sec-head:first-of-type { margin-top: 8px; }
h2 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 600;
  scroll-margin-top: 20px;
}
.nedir {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 28px;
  align-items: start;
  margin-bottom: 8px;
}
.nedir .sec-head { margin-top: 0; }
.product { margin: 0; max-width: none; }
.product img {
  width: 100%;
  height: auto;
  display: block;
  background: #fff;
  border: 1px solid var(--grey-lighter);
  border-radius: 8px;
}
.product figcaption {
  margin-top: 8px;
  font-size: .85rem;
  font-weight: 300;
  color: var(--grey);
}
h3 { margin: 26px 0 8px; font-size: 1.05rem; font-weight: 600; }
p { margin: 0 0 16px; font-weight: 300; }
ul, ol { margin: 0 0 16px; padding-left: 22px; }
li { margin-bottom: 6px; font-weight: 300; }

.quick-answer {
  background: var(--green-light);
  border-left: 4px solid var(--secondary);
  padding: 16px 20px;
  margin-bottom: 20px;
}
.qa-label {
  margin: 0 0 8px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--green);
}
.quick-answer p:last-child { margin: 0; font-weight: 400; }

.notice { padding: 14px 18px; margin: 16px 0 24px; }
.notice p { margin: 0; font-size: .92rem; }
.notice strong { display: block; margin-bottom: 4px; font-size: .9rem; }
.notice-danger { background: #fef2f2; border-left: 3px solid #dc2626; }
.notice-danger strong { color: #991b1b; }
.notice-info { background: var(--green-light); border-left: 3px solid var(--secondary); }
.notice-info strong { color: var(--green); }

.faq-item { border-bottom: 1px solid var(--grey-lighter); padding: 18px 0; }
.faq-question {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin: 0 0 8px;
  font-weight: 600;
}
.faq-q-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--secondary);
  color: #fff;
  font-size: .7rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: none;
  margin-top: 3px;
}
.faq-answer { margin: 0; padding-left: 30px; font-size: .95rem; }

.references {
  background: #f7f8fc;
  border: 1px solid var(--grey-lighter);
  padding: 22px 26px;
  margin-top: 36px;
  font-size: .88rem;
}
.references h3 { margin: 0 0 12px; }
.references ol { margin: 0; }
.medical-disclaimer {
  background: #fef2f2;
  border-left: 3px solid #dc2626;
  padding: 16px 18px;
  margin-top: 18px;
}
.medical-disclaimer strong { display: block; color: #991b1b; margin-bottom: 6px; }
.medical-disclaimer p { margin: 0; color: #7f1d1d; font-size: .9rem; }

footer { border-top: 1px solid var(--grey-lighter); }
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px 28px;
  flex-wrap: wrap;
  padding: 32px 0 40px;
}
.footer-left { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.footer-logo { display: flex; align-items: center; gap: 8px; text-decoration: none; }
.footer-logo-icon { width: 34px; height: 34px; border-radius: 8px; font-size: 15px; }
.footer-copy { margin: 0; font-size: .85rem; font-weight: 300; }
.footer-note { margin: 0; margin-left: auto; font-size: .85rem; font-weight: 300; color: var(--grey); text-align: right; }

@media (max-width: 720px) {
  .container { padding: 0 16px; }
  header { position: relative; }
  .nav-inner {
    align-items: center;
    flex-direction: row;
    gap: 12px;
    padding: 12px 0;
  }
  .nav-logo-icon { width: 34px; height: 34px; font-size: 16px; border-radius: 8px; }
  .nav-logo-text { font-size: 1.15rem; }
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 20;
    flex-direction: column;
    gap: 0;
    margin: 0;
    padding: 0;
    background: #fff;
    border-bottom: 1px solid var(--grey-lighter);
    box-shadow: 0 8px 18px rgba(16, 24, 72, .08);
  }
  header.open .nav-links { display: flex; }
  .nav-links a { font-size: 1rem; padding: 14px 0; }
  .cta-btn { display: block; text-align: center; }
  .intro-section { padding: 32px 0 28px; }
  h1 { font-size: 1.7rem; }
  .footer-inner { flex-direction: column; align-items: stretch; gap: 10px; padding: 22px 0 28px; }
  .footer-left { justify-content: center; width: 100%; }
  .footer-note {
    margin-left: 0;
    width: 100%;
    text-align: center;
    padding-top: 10px;
    border-top: 1px solid var(--grey-lighter);
  }
  .nedir { grid-template-columns: 1fr; }
  .nedir .product { order: -1; max-width: 420px; }
}