:root {
  --zemin: #f3f1ec;
  --kart: #ffffff;
  --metin: #1d1f1e;
  --soluk: #6b6f6c;
  --cizgi: #e4e1da;
  --vurgu: #1f6f5c;
  --vurgu-acik: #e3f0ec;
  --vurgu-metin: #ffffff;
  --hata: #b3261e;
  --hata-acik: #fbe9e7;
  --ok: #1f6f5c;
  --golge: 0 1px 2px rgba(0,0,0,.04), 0 8px 28px rgba(0,0,0,.06);
}
@media (prefers-color-scheme: dark) {
  :root {
    --zemin: #141615;
    --kart: #1d201f;
    --metin: #ecebe7;
    --soluk: #9a9e9b;
    --cizgi: #2f3331;
    --vurgu: #5cc3a4;
    --vurgu-acik: #1c3330;
    --vurgu-metin: #0f1f1b;
    --hata: #ff8a80;
    --hata-acik: #3a1f1d;
    --ok: #5cc3a4;
    --golge: none;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--zemin);
  color: var(--metin);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
  display: flex; justify-content: center; align-items: flex-start;
  padding: max(24px, 5vh) 16px 32px;
}
[hidden] { display: none !important; }
.kart {
  width: 100%; max-width: 440px;
  background: var(--kart);
  border: 1px solid var(--cizgi);
  border-radius: 18px;
  padding: 24px;
  box-shadow: var(--golge);
}
.kart.genis { max-width: 720px; }
.bas { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.logo {
  width: 44px; height: 44px; border-radius: 12px; flex: none;
  display: grid; place-items: center;
  background: var(--vurgu-acik); color: var(--vurgu);
}
h1 { font-size: 20px; margin: 0; letter-spacing: -.01em; }
h2 { font-size: 18px; margin: 0 0 8px; }
p { margin: 0 0 12px; }
.alt { color: var(--soluk); margin: 0; font-size: 14px; }
.kucuk { font-size: 13px; color: var(--soluk); }
.orta { text-align: center; }

/* karekod */
.qr-duzen { display: grid; grid-template-columns: 280px 1fr; gap: 28px; align-items: center; }
.qr-kutu { width: 100%; }
.qr {
  aspect-ratio: 1; width: 100%;
  background: #fff; border-radius: 14px; border: 1px solid var(--cizgi);
  display: grid; place-items: center; overflow: hidden;
}
.qr svg { width: 100%; height: 100%; display: block; }
.yukleniyor { color: #888; font-size: 14px; }
.sure-cubuk { height: 3px; background: var(--cizgi); border-radius: 3px; margin: 12px 0 6px; overflow: hidden; }
.sure-cubuk span { display: block; height: 100%; width: 100%; background: var(--vurgu); transition: width .5s linear; }
.adimlar { margin: 0; padding: 0; list-style: none; counter-reset: a; }
.adimlar li { counter-increment: a; position: relative; padding: 0 0 18px 42px; }
.adimlar li::before {
  content: counter(a); position: absolute; left: 0; top: -2px;
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--vurgu-acik); color: var(--vurgu);
  display: grid; place-items: center; font-weight: 600; font-size: 14px;
}
@media (max-width: 640px) {
  .qr-duzen { grid-template-columns: 1fr; }
  .qr-kutu { max-width: 300px; margin: 0 auto; }
}

/* şerit */
.serit {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; border-radius: 12px; margin-bottom: 16px; font-size: 14px;
}
.serit.ok { background: var(--vurgu-acik); color: var(--metin); }
.serit .nokta { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); flex: none; animation: nabiz 2s infinite; }
.serit .sag { margin-left: auto; }
@keyframes nabiz { 50% { opacity: .35; } }

/* bırakma alanı */
.birak {
  display: flex; flex-direction: column; align-items: center; gap: 4px; text-align: center;
  border: 2px dashed var(--cizgi); border-radius: 14px; padding: 32px 16px;
  cursor: pointer; color: var(--soluk); transition: border-color .15s, background .15s;
}
.birak b { color: var(--metin); font-size: 16px; }
.birak svg { color: var(--vurgu); margin-bottom: 6px; }
.birak:hover, .birak:focus-visible, .birak.uzerinde { border-color: var(--vurgu); background: var(--vurgu-acik); outline: none; }
.birak.pasif { opacity: .45; pointer-events: none; }
.birak input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }

/* listeler */
.liste { list-style: none; margin: 16px 0 0; padding: 0; display: grid; gap: 8px; }
.oge { border: 1px solid var(--cizgi); border-radius: 12px; padding: 12px 14px; }
.oge .ust { display: flex; gap: 10px; align-items: baseline; }
.oge .ad { font-weight: 600; overflow-wrap: anywhere; flex: 1; }
.oge .durum { white-space: nowrap; }
.oge .alt-satir { display: flex; gap: 12px; align-items: center; margin-top: 4px; }
.oge .cubuk { flex: 1; height: 4px; background: var(--cizgi); border-radius: 4px; overflow: hidden; }
.oge .cubuk span { display: block; height: 100%; width: 0; background: var(--vurgu); transition: width .2s; }
.oge.bitti .durum { color: var(--ok); font-weight: 600; }
.oge.hatali { border-color: var(--hata); background: var(--hata-acik); }
.oge.hatali .durum { color: var(--hata); white-space: normal; }
.butonlar { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.butonlar:empty { display: none; }

/* butonlar ve alanlar */
.satir { display: flex; gap: 10px; margin-top: 18px; justify-content: flex-end; }
.satir.iki > * { flex: 1; }
.buton {
  appearance: none; border: 1px solid var(--vurgu); background: var(--vurgu); color: var(--vurgu-metin);
  font: inherit; font-weight: 600; padding: 11px 18px; border-radius: 11px; cursor: pointer;
  text-decoration: none; display: inline-flex; align-items: center; justify-content: center;
}
.buton:disabled { opacity: .5; cursor: default; }
.buton.ikincil { background: transparent; color: var(--metin); border-color: var(--cizgi); }
.buton.tehlike { background: transparent; color: var(--hata); border-color: var(--hata); }
.kucuk-buton { padding: 7px 12px; font-size: 14px; border-radius: 9px; }
.alan { display: grid; gap: 6px; margin: 14px 0; }
.alan > span:first-child { font-weight: 600; font-size: 14px; }
.alan input {
  font: inherit; font-size: 16px; padding: 11px 12px; border-radius: 10px;
  border: 1px solid var(--cizgi); background: var(--zemin); color: var(--metin);
}
.alan input:focus { outline: 2px solid var(--vurgu); outline-offset: 1px; }
.telefon .buton:not(.kucuk-buton) { width: 100%; }
.telefon .satir.iki .buton { width: auto; }

.bilgi-kart { border: 1px solid var(--cizgi); border-radius: 12px; padding: 4px 14px; margin: 12px 0; }
.bk-satir { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--cizgi); font-size: 15px; }
.bk-satir:last-child { border-bottom: 0; }
.bk-satir span { color: var(--soluk); }
.bk-satir b { text-align: right; }

.kutu-bas { display: flex; justify-content: space-between; align-items: center; }
.kutu-bas h2 { margin: 0; }
.bos { color: var(--soluk); text-align: center; padding: 28px 8px; border: 1px dashed var(--cizgi); border-radius: 12px; margin-top: 16px; }
.ayarlar { margin-top: 24px; border-top: 1px solid var(--cizgi); padding-top: 12px; }
.ayarlar summary { cursor: pointer; color: var(--soluk); font-size: 14px; }
.ayarlar .buton { margin: 8px 0; }

.ipucu { background: var(--zemin); border-radius: 12px; padding: 12px 16px; font-size: 14px; }
.ipucu ul { margin: 6px 0 0; padding-left: 18px; }
.hata { color: var(--hata); background: var(--hata-acik); border-radius: 10px; padding: 10px 12px; margin: 16px 0 0; font-size: 14px; }
.dip { display: flex; align-items: center; gap: 6px; margin-top: 22px; padding-top: 14px; border-top: 1px solid var(--cizgi); }

/* ---- uygulama hâli: karekod okuyucu, ana ekran ipucu, bilgi mesajı ---- */
.tara-buton { width: 100%; gap: 8px; margin-bottom: 16px; padding: 14px 18px; font-size: 16px; }
.tarayici {
  position: relative; width: 100%; aspect-ratio: 1; border-radius: 16px; overflow: hidden;
  background: #000; margin: 12px 0;
}
.tarayici video { width: 100%; height: 100%; object-fit: cover; display: block; }
.tarayici-cerceve {
  position: absolute; inset: 14%; border-radius: 14px;
  box-shadow: 0 0 0 9999px rgba(0, 0, 0, .35);
  border: 3px solid rgba(255, 255, 255, .9);
}
#b-tara .buton { width: 100%; margin-top: 8px; }
.ipucu.ana-ekran { margin-bottom: 14px; border: 1px solid var(--cizgi); }
.ipucu.ana-ekran p { margin: 6px 0 10px; }
.kucuk-ipucu { margin-top: 16px; font-size: 13px; }
.hata.bilgi-mesaj { color: var(--metin); background: var(--vurgu-acik); }