:root {
  --kagit: #e4ebf0;
  --yuzey: #f3f7fa;
  --murekkep: #15293f;
  --mavi: #235a84;
  --mavi-koyu: #16415f;
  --soluk: #566b7e;
  --cizgi: #c2d1dc;
  --cizgi2: #d4e0e8;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--kagit); color: var(--murekkep);
  font-family: "Spectral", Georgia, serif; font-size: 17px; line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
.sans { font-family: "Archivo", system-ui, sans-serif; }
a { color: var(--mavi); }
.kol { width: 100%; max-width: 760px; margin: 0 auto; padding: 0 24px; }

nav { border-bottom: 1px solid var(--cizgi); }
nav .ic { display: flex; align-items: center; justify-content: space-between; height: 58px; }
.marka { font-family: "Archivo", sans-serif; font-weight: 700; font-size: 17px; letter-spacing: -0.01em; display: flex; align-items: center; gap: 9px; }
.mark-nokta { width: 15px; height: 15px; border: 2px solid var(--mavi); border-radius: 50%; position: relative; }
.mark-nokta::after { content: ''; position: absolute; width: 4px; height: 4px; background: var(--mavi); border-radius: 50%; top: 3.5px; left: 3.5px; }
.gh { font-family: "Archivo", sans-serif; font-size: 14px; color: var(--soluk); text-decoration: none; display: inline-flex; align-items: center; gap: 7px; }
.gh:hover { color: var(--murekkep); }
.gh svg { width: 17px; height: 17px; fill: currentColor; }
.nav-sag { display: flex; align-items: center; gap: 18px; }
.diller { display: inline-flex; border: 1px solid var(--cizgi); border-radius: 3px; overflow: hidden; }
.diller button { font-family: "Archivo", sans-serif; font-weight: 600; font-size: 12.5px; letter-spacing: 0.02em;
  cursor: pointer; background: transparent; color: var(--soluk); border: none; padding: 5px 10px; }
.diller button + button { border-left: 1px solid var(--cizgi); }
.diller button.etkin { background: var(--murekkep); color: #fff; }
.diller button:hover:not(.etkin) { color: var(--murekkep); }

/* HERO */
.hero { padding: 64px 0 56px; }
.hero-ic { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 44px; align-items: center; }
h1 { font-family: "Archivo", sans-serif; font-weight: 800; font-size: 46px; line-height: 1.04;
  letter-spacing: -0.025em; margin: 0 0 20px; }
.hero p { font-size: 18.5px; color: var(--soluk); margin: 0 0 26px; max-width: 30em; }
.eylem { display: flex; align-items: center; gap: 22px; }
.dugme { font-family: "Archivo", sans-serif; font-weight: 600; font-size: 15px; cursor: pointer;
  background: var(--mavi); color: #fff; border: none; padding: 12px 22px; border-radius: 3px; text-decoration: none; }
.dugme:hover { background: var(--mavi-koyu); }
.baglanti { font-family: "Archivo", sans-serif; font-size: 15px; color: var(--murekkep); text-decoration: none; border-bottom: 1.5px solid var(--mavi); padding-bottom: 2px; }

.kare { aspect-ratio: 1; border: 1px solid var(--cizgi); background: #0f3351; padding: 10px;
  box-shadow: 6px 6px 0 var(--cizgi2); }
.kare svg { display: block; width: 100%; height: 100%; }
.gelis { animation: gelis 1.6s ease forwards; }
@keyframes gelis { from { opacity: 0.12; filter: contrast(2.2) brightness(1.5); } to { opacity: 1; filter: none; } }
.kare-alt { font-family: "Archivo", sans-serif; font-size: 12.5px; color: var(--soluk); margin-top: 10px; text-align: center; }

section { padding: 56px 0; border-top: 1px solid var(--cizgi); }
h2 { font-family: "Archivo", sans-serif; font-weight: 700; font-size: 29px; letter-spacing: -0.02em; margin: 0 0 18px; }
h3 { font-family: "Archivo", sans-serif; font-weight: 600; font-size: 17px; margin: 26px 0 8px; }
p { margin: 0 0 14px; }
.dar { max-width: 62ch; }

/* ARAC */
#arac { scroll-margin-top: 20px; }
.sekmeler { display: inline-flex; border: 1px solid var(--cizgi); border-radius: 3px; overflow: hidden; margin-bottom: 20px; }
.sekmeler button { font-family: "Archivo", sans-serif; font-weight: 600; font-size: 15px; cursor: pointer;
  background: transparent; color: var(--soluk); border: none; padding: 10px 26px; }
.sekmeler button + button { border-left: 1px solid var(--cizgi); }
.sekmeler button.etkin { background: var(--murekkep); color: #fff; }
.panel { border: 1px solid var(--cizgi); background: var(--yuzey); padding: 22px; max-width: 520px; }
.birak { border: 1.5px dashed var(--cizgi); background: #fff; padding: 26px 16px; text-align: center;
  color: var(--soluk); cursor: pointer; font-family: "Archivo", sans-serif; font-size: 14px; }
.birak:hover, .birak.uzerinde { border-color: var(--mavi); color: var(--murekkep); }
.birak .ikon { width: 26px; height: 26px; margin: 0 auto 8px; stroke: var(--mavi); fill: none; stroke-width: 1.6; }
.birak .ipucu { font-size: 12.5px; margin-top: 5px; opacity: 0.8; }
.birak img { max-width: 100%; max-height: 170px; display: block; margin: 0 auto; }
.birak.dolu { padding: 10px; border-style: solid; }
.kapasite { font-family: "Archivo", sans-serif; font-size: 12.5px; color: var(--soluk); margin-top: 8px; }
.alan { margin-top: 16px; }
label { font-family: "Archivo", sans-serif; display: block; font-size: 13px; color: var(--soluk); margin-bottom: 6px; }
textarea, input[type=password] { font-family: "Archivo", sans-serif; width: 100%; padding: 11px 13px;
  background: #fff; border: 1px solid var(--cizgi); border-radius: 3px; color: var(--murekkep); font-size: 15px; }
textarea { resize: vertical; min-height: 84px; line-height: 1.5; }
textarea:focus, input:focus, .birak:focus-visible { outline: 2px solid var(--mavi); outline-offset: 1px; }
.ana { font-family: "Archivo", sans-serif; width: 100%; margin-top: 18px; padding: 13px; border: none;
  border-radius: 3px; background: var(--mavi); color: #fff; font-weight: 600; font-size: 15px; cursor: pointer; }
.ana:hover:not(:disabled) { background: var(--mavi-koyu); }
.ana:disabled { opacity: 0.4; cursor: default; }
.sonuc { font-family: "Archivo", sans-serif; margin-top: 15px; padding: 11px 13px; border-radius: 3px;
  font-size: 14px; display: none; gap: 9px; line-height: 1.5; border-left: 3px solid; }
.sonuc.goster { display: flex; }
.sonuc.iyi { background: #e3eee6; color: #1e6b45; border-color: #1e6b45; }
.sonuc.kotu { background: #f3e2e2; color: #9a2e2e; border-color: #9a2e2e; }
.mesajkutu { margin-top: 14px; display: none; }
.mesajkutu label { display: flex; justify-content: space-between; align-items: center; }
.mesajkutu .govde { background: #fff; border: 1px solid var(--cizgi); border-radius: 3px; padding: 13px;
  white-space: pre-wrap; word-break: break-word; }
.kopya { font-family: "Archivo", sans-serif; background: none; border: none; color: var(--mavi); cursor: pointer; font-size: 12.5px; }

/* DIYAGRAM */
.diyagram { background: var(--yuzey); border: 1px solid var(--cizgi); padding: 24px; margin: 22px 0 6px; }
.diyagram svg { width: 100%; height: auto; display: block; }
.diyagram figcaption { font-size: 15px; color: var(--soluk); margin-top: 14px; font-style: italic; }

ul { color: var(--murekkep); padding-left: 1.1em; }
li { margin-bottom: 8px; }
li::marker { color: var(--mavi); }

/* GIZLILIK */
.gizlilik p { max-width: 60ch; }
.gizlilik .oku { font-family: "Archivo", sans-serif; display: inline-block; margin-top: 8px; font-size: 15px;
  border-bottom: 1.5px solid var(--mavi); text-decoration: none; color: var(--murekkep); padding-bottom: 2px; }

details { border-bottom: 1px solid var(--cizgi); }
summary { font-family: "Archivo", sans-serif; font-weight: 600; font-size: 16px; cursor: pointer;
  padding: 16px 0; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: '+'; color: var(--mavi); font-family: "Archivo", sans-serif; }
details[open] summary::after { content: '–'; }
details p { color: var(--soluk); margin: 0 0 16px; max-width: 62ch; }

footer { border-top: 1px solid var(--cizgi); padding: 26px 0; }
footer .ic { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  font-family: "Archivo", sans-serif; font-size: 13.5px; color: var(--soluk); }

@media (max-width: 680px) {
  .hero-ic { grid-template-columns: 1fr; gap: 30px; }
  .kare { max-width: 300px; }
  h1 { font-size: 36px; }
  .eylem { flex-wrap: wrap; }
}
@media (prefers-reduced-motion: reduce) { .gelis { animation: none; } }