:root {
  --zemin: #ffffff; --zemin-2: #f7f8fb; --yuzey: #ffffff; --metin: #0f172a; --soluk: #5b6474; --cizgi: #e5e7eb;
  --vurgu: #2563eb; --vurgu-koyu: #1d4ed8; --vurgu-acik: #eef3ff; --ok: #15803d; --hata: #b42318; --hata-zemin: #fef3f2;
  --girdi: #ffffff; --golge: 0 20px 50px -20px rgba(15, 23, 42, .25);
  color-scheme: light;
}
:root[data-tema="koyu"] {
  --zemin: #0d1015; --zemin-2: #12161d; --yuzey: #171b23; --metin: #e8ebf0; --soluk: #9aa3b2; --cizgi: #262c37;
  --vurgu: #6b9bff; --vurgu-koyu: #8fb2ff; --vurgu-acik: #1a2540; --ok: #4ade80; --hata: #f87171; --hata-zemin: #2c1717;
  --girdi: #10131a; --golge: 0 20px 50px -20px rgba(0, 0, 0, .7);
  color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body { margin: 0; font: 16px/1.6 Inter, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; color: var(--metin); background: var(--zemin); }
a { color: var(--vurgu); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3 { letter-spacing: -.02em; line-height: 1.2; }
.kap { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 24px; }
.kap.dar { max-width: 820px; }
.ikon { width: 20px; height: 20px; flex-shrink: 0; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.tema-gunes { display: none; }
:root[data-tema="koyu"] .tema-gunes { display: block; }
:root[data-tema="koyu"] .tema-ay { display: none; }

.dugme { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 9px 16px; border-radius: 9px;
  font: 600 14px/1.2 inherit; font-family: inherit; border: 1px solid transparent; cursor: pointer; white-space: nowrap; }
.dugme:hover { text-decoration: none; }
.dugme.buyuk { padding: 13px 22px; font-size: 15px; }
.dugme.tam { width: 100%; }
.dugme.birincil { background: var(--vurgu); color: #fff; }
.dugme.birincil:hover { background: var(--vurgu-koyu); }
:root[data-tema="koyu"] .dugme.birincil { color: #0b1020; }
.dugme.cizgili { border-color: var(--cizgi); color: var(--metin); background: var(--yuzey); }
.dugme.cizgili:hover { border-color: var(--soluk); }
.dugme.beyaz { background: #fff; color: #1e3a8a; }
.dugme.cizgili-beyaz { border-color: rgba(255, 255, 255, .5); color: #fff; }
.dugme.cizgili-beyaz:hover { background: rgba(255, 255, 255, .1); }
.ikon-dugme { display: inline-grid; place-items: center; width: 38px; height: 38px; border: 0; border-radius: 9px; background: none; color: var(--soluk); cursor: pointer; }
.ikon-dugme:hover { background: var(--zemin-2); color: var(--metin); }

/* üst menü */
.site-ust { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--zemin) 88%, transparent);
  backdrop-filter: saturate(1.5) blur(10px); border-bottom: 1px solid var(--cizgi); }
.site-ust .kap { display: flex; align-items: center; gap: 28px; height: 64px; }
.marka { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; color: var(--metin); }
.marka:hover { text-decoration: none; }
.logo-isaret { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 8px; background: var(--vurgu); color: #fff; font: 700 18px/1 Georgia, serif; }
.site-menu { display: flex; gap: 22px; }
.site-menu a { color: var(--soluk); font-size: 14.5px; font-weight: 500; }
.site-menu a:hover { color: var(--metin); text-decoration: none; }
.site-eylem { margin-left: auto; display: flex; align-items: center; gap: 10px; }

/* kahraman */
.kahraman { padding: 72px 0 80px; background: radial-gradient(1200px 500px at 85% -10%, var(--vurgu-acik), transparent 70%); }
.kahraman-ic { display: grid; grid-template-columns: 1fr 1.15fr; gap: 56px; align-items: center; }
.ust-etiket { display: inline-block; padding: 5px 12px; border-radius: 999px; background: var(--vurgu-acik); color: var(--vurgu); font-size: 13px; font-weight: 600; }
.kahraman h1 { font-size: clamp(34px, 4.6vw, 54px); margin: 18px 0 18px; }
.kahraman h1 em { font-style: normal; color: var(--vurgu); }
.giris-metni { font-size: 18px; color: var(--soluk); margin: 0 0 28px; max-width: 560px; }
.kahraman-eylem { display: flex; gap: 12px; flex-wrap: wrap; }
.kahraman-madde { list-style: none; padding: 0; margin: 28px 0 0; display: flex; flex-direction: column; gap: 8px; color: var(--soluk); font-size: 15px; }
.kahraman-madde li { display: flex; align-items: center; gap: 10px; }
.kahraman-madde .ikon { color: var(--ok); width: 18px; height: 18px; }
.ekran { margin: 0; border-radius: 14px; overflow: hidden; border: 1px solid var(--cizgi); box-shadow: var(--golge); background: var(--yuzey); }

/* bölümler */
.bolum { padding: 88px 0; }
.bolum.gri { background: var(--zemin-2); border-top: 1px solid var(--cizgi); border-bottom: 1px solid var(--cizgi); }
.bolum-baslik { font-size: clamp(28px, 3.2vw, 38px); text-align: center; margin: 0 0 12px; }
.bolum-alt { text-align: center; color: var(--soluk); max-width: 680px; margin: 0 auto 44px; font-size: 17px; }
.sol { text-align: left; margin-left: 0; }
.uclu { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.dortlu { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 36px; }
.ozellik { background: var(--yuzey); border: 1px solid var(--cizgi); border-radius: 14px; padding: 26px; }
.ozellik h3 { margin: 16px 0 8px; font-size: 19px; }
.ozellik p { margin: 0; color: var(--soluk); font-size: 15px; }
.ozellik-ikon { display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 11px; background: var(--vurgu-acik); color: var(--vurgu); }
.kucuk-ozellik { padding: 20px; border-radius: 12px; background: var(--yuzey); border: 1px solid var(--cizgi); }
.kucuk-ozellik > .ikon { color: var(--vurgu); }
.kucuk-ozellik h3 { font-size: 16px; margin: 12px 0 6px; }
.kucuk-ozellik p { margin: 0; font-size: 14px; color: var(--soluk); }

.modul-izgara { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.modul-izgara li { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 14px 16px; border: 1px solid var(--cizgi); border-radius: 10px; background: var(--yuzey); }
.modul-izgara strong { font-size: 15px; font-weight: 600; }
.modul-izgara span { font-size: 12px; color: var(--soluk); background: var(--zemin-2); border-radius: 999px; padding: 2px 9px; white-space: nowrap; }
.modul-kategori { margin: 32px 0 12px; font-size: 18px; }
.modul-kategori small { font-size: 13px; font-weight: 500; color: var(--soluk); margin-left: 6px; }
.modul-izgara li.hazir span { color: var(--vurgu); background: var(--vurgu-acik); }

.adimlar { list-style: none; padding: 0; margin: 40px 0 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: adim; }
.adimlar li { position: relative; }
.adimlar li > span { display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; background: var(--vurgu); color: #fff; font-weight: 700; }
:root[data-tema="koyu"] .adimlar li > span { color: #0b1020; }
.adimlar h3 { margin: 16px 0 6px; font-size: 18px; }
.adimlar p { margin: 0; color: var(--soluk); font-size: 15px; }

.paketler { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: stretch; }
.paket { position: relative; display: flex; flex-direction: column; padding: 30px 26px; border: 1px solid var(--cizgi); border-radius: 16px; background: var(--yuzey); }
.paket.onerilen { border: 2px solid var(--vurgu); box-shadow: var(--golge); }
.onerilen-etiket { position: absolute; top: -13px; left: 50%; transform: translateX(-50%); background: var(--vurgu); color: #fff;
  font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: 999px; }
.paket h3 { font-size: 22px; margin: 0; }
.paket-alt { color: var(--soluk); margin: 4px 0 20px; }
.paket ul { list-style: none; padding: 0; margin: 0 0 26px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.paket li { display: flex; gap: 10px; align-items: center; font-size: 15px; }
.paket li .ikon { color: var(--ok); width: 18px; height: 18px; }

.sss { border-bottom: 1px solid var(--cizgi); }
.sss summary { cursor: pointer; list-style: none; padding: 20px 0; font-weight: 600; font-size: 17px; display: flex; justify-content: space-between; gap: 16px; }
.sss summary::-webkit-details-marker { display: none; }
.sss summary::after { content: "+"; color: var(--soluk); font-size: 22px; line-height: 1; }
.sss[open] summary::after { content: "−"; }
.sss p { margin: 0 0 20px; color: var(--soluk); }

.teklif-kap { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: start; }
.iletisim { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 6px; font-weight: 600; }
.teklif-form { display: flex; flex-direction: column; gap: 14px; padding: 28px; border-radius: 16px; background: var(--yuzey); border: 1px solid var(--cizgi); box-shadow: var(--golge); }
.teklif-form.tamam { align-items: center; text-align: center; padding: 48px 28px; }
.teklif-form.tamam h3 { margin: 10px 0 0; font-size: 22px; }
.teklif-form.tamam p { margin: 0; color: var(--soluk); }
.teklif-form .iki { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.teklif-form label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; font-weight: 600; }
.teklif-form label.onay { flex-direction: row; align-items: flex-start; gap: 10px; font-weight: 400; color: var(--soluk); }
.teklif-form label.onay input { margin-top: 4px; }
.teklif-form input:not([type=checkbox]), .teklif-form select, .teklif-form textarea { font: inherit; font-size: 15px; color: var(--metin); padding: 10px 12px;
  border: 1px solid var(--cizgi); border-radius: 9px; background: var(--girdi); }
.teklif-form input:focus, .teklif-form select:focus, .teklif-form textarea:focus { outline: 3px solid var(--vurgu-acik); border-color: var(--vurgu); }
.teklif-form .dugme { align-self: flex-start; }
.gizli-alan { position: absolute !important; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.bildirim.hata { background: var(--hata-zemin); color: var(--hata); border-radius: 9px; padding: 10px 14px; }
.bildirim ul { margin: 0; padding-left: 18px; }

.cta { padding: 72px 0; background: linear-gradient(135deg, #1e3a8a, #2563eb); color: #fff; text-align: center; }
.cta h2 { font-size: clamp(26px, 3vw, 34px); margin: 0 0 24px; }
.cta .kahraman-eylem { justify-content: center; }

.metin-sayfa h1 { font-size: 34px; }
.metin-sayfa h2 { font-size: 21px; margin-top: 32px; }
.metin-sayfa p, .metin-sayfa li { color: var(--soluk); }

.site-alt { padding: 48px 0 28px; border-top: 1px solid var(--cizgi); background: var(--zemin); }
.site-alt .kap { display: flex; gap: 40px; justify-content: space-between; flex-wrap: wrap; }
.site-alt p { color: var(--soluk); font-size: 14px; max-width: 340px; }
.alt-baglanti { display: flex; flex-direction: column; gap: 8px; font-size: 14px; }
.alt-baglanti a { color: var(--soluk); }
.alt-baglanti a:hover { color: var(--metin); }
.telif { margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--cizgi); color: var(--soluk); font-size: 13px; }

@media (max-width: 1000px) {
  .site-menu { display: none; }
  .kahraman-ic, .teklif-kap { grid-template-columns: 1fr; }
  .uclu, .paketler { grid-template-columns: 1fr; }
  .dortlu, .modul-izgara { grid-template-columns: repeat(2, 1fr); }
  .adimlar { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .kap { padding: 0 16px; }
  .site-eylem .cizgili { display: none; }
  .kahraman { padding: 44px 0 56px; }
  .bolum { padding: 60px 0; }
  .dortlu, .modul-izgara, .adimlar, .teklif-form .iki { grid-template-columns: 1fr; }
  .teklif-form { padding: 20px; }
}