:root {
  --mavi: #2563eb;
  --mavi-koyu: #1e40af;
  --turuncu: #f97316;
  --yesil: #10b981;
  --metin: #1e293b;
  --soluk: #64748b;
  --zemin: #f8fafc;
  --kart: #ffffff;
  --cizgi: #e2e8f0;
}
@media (prefers-color-scheme: dark) {
  :root {
    --metin: #e2e8f0;
    --soluk: #94a3b8;
    --zemin: #0b1220;
    --kart: #111a2e;
    --cizgi: #1e293b;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--metin);
  background: var(--zemin);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--mavi); }
img { max-width: 100%; display: block; }
.kap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* ---------------------------------------------------------------- üst */
header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--zemin) 85%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--cizgi);
}
header .kap { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.marka { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; color: var(--metin); text-decoration: none; }
.marka img { width: 36px; height: 36px; border-radius: 10px; }
nav { display: flex; gap: 22px; }
nav a { color: var(--soluk); text-decoration: none; font-weight: 600; font-size: 14.5px; }
nav a:hover { color: var(--mavi); }
@media (max-width: 640px) { nav { display: none; } }

/* ---------------------------------------------------------------- hero */
.hero { padding: 72px 0 56px; }
.hero .kap { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; }
.rozet {
  display: inline-block; padding: 6px 12px; border-radius: 999px;
  background: color-mix(in srgb, var(--turuncu) 14%, transparent);
  color: var(--turuncu); font-weight: 700; font-size: 13px;
}
h1 { font-size: clamp(34px, 5vw, 52px); line-height: 1.1; margin: 16px 0; letter-spacing: -0.02em; }
h1 span { color: var(--mavi); }
.hero p { font-size: 18px; color: var(--soluk); max-width: 520px; }
.dugmeler { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.dugme {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 13px 20px; border-radius: 14px; font-weight: 700; font-size: 15px;
  text-decoration: none; border: 1px solid var(--cizgi); color: var(--metin); background: var(--kart);
}
.dugme.ana { background: var(--mavi); color: #fff; border-color: var(--mavi); }
.dugme small { display: block; font-weight: 500; font-size: 11.5px; opacity: .8; line-height: 1.1; }
.hero-gorsel img {
  width: 100%; max-width: 380px; margin-left: auto; border-radius: 40px;
  box-shadow: 0 30px 60px -20px rgba(37, 99, 235, .45);
}
@media (max-width: 820px) {
  .hero { padding: 40px 0; }
  .hero .kap { grid-template-columns: 1fr; }
  .hero-gorsel img { max-width: 240px; margin: 0 auto; }
}

/* ---------------------------------------------------------------- bölümler */
section { padding: 56px 0; }
h2 { font-size: clamp(26px, 3.5vw, 34px); margin: 0 0 8px; letter-spacing: -0.01em; }
.alt { color: var(--soluk); margin: 0 0 32px; font-size: 16.5px; }
.izgara { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 860px) { .izgara { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .izgara { grid-template-columns: 1fr; } }
.kart {
  background: var(--kart); border: 1px solid var(--cizgi); border-radius: 18px; padding: 22px;
}
.kart .ikon {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  background: color-mix(in srgb, var(--mavi) 12%, transparent); font-size: 22px; margin-bottom: 12px;
}
.kart h3 { margin: 0 0 6px; font-size: 17px; }
.kart p { margin: 0; color: var(--soluk); font-size: 14.5px; }

.ikili { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 760px) { .ikili { grid-template-columns: 1fr; } }
.vurgu { padding: 28px; border-radius: 22px; color: #fff; }
.vurgu.mavi { background: linear-gradient(135deg, var(--mavi), var(--mavi-koyu)); }
.vurgu.turuncu { background: linear-gradient(135deg, #fb923c, #ea580c); }
.vurgu h3 { margin: 0 0 10px; font-size: 22px; }
.vurgu ul { margin: 0; padding-left: 20px; }
.vurgu li { margin: 6px 0; }

.adimlar { counter-reset: adim; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 760px) { .adimlar { grid-template-columns: 1fr; } }
.adimlar .kart::before {
  counter-increment: adim; content: counter(adim);
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%;
  background: var(--mavi); color: #fff; font-weight: 800; margin-bottom: 12px;
}

.sss details {
  background: var(--kart); border: 1px solid var(--cizgi); border-radius: 14px;
  padding: 16px 18px; margin-bottom: 10px;
}
.sss summary { font-weight: 700; cursor: pointer; }
.sss details p { color: var(--soluk); margin: 10px 0 0; }

/* ---------------------------------------------------------------- yasal metin */
.metin { max-width: 760px; padding: 48px 20px 64px; margin: 0 auto; }
.metin h1 { font-size: clamp(28px, 4vw, 38px); }
.metin h2 { font-size: 21px; margin-top: 34px; }
.metin p, .metin li { color: var(--metin); }
.metin .tarih { color: var(--soluk); font-size: 14px; }
.metin table { width: 100%; border-collapse: collapse; font-size: 14.5px; margin: 12px 0; }
.metin th, .metin td { text-align: left; padding: 10px; border-bottom: 1px solid var(--cizgi); vertical-align: top; }
.metin th { color: var(--soluk); font-weight: 600; }
.tablo-kap { overflow-x: auto; }
.not {
  background: color-mix(in srgb, var(--mavi) 8%, transparent);
  border-left: 4px solid var(--mavi); padding: 14px 16px; border-radius: 10px; margin: 18px 0;
}

/* ---------------------------------------------------------------- alt */
footer { border-top: 1px solid var(--cizgi); padding: 32px 0; color: var(--soluk); font-size: 14px; }
footer .kap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 14px; }
footer a { color: var(--soluk); text-decoration: none; margin-right: 18px; }
footer a:hover { color: var(--mavi); }