/* Margvanta — herkese açık site. Palet: lacivert (marka, metin) + koyu yeşil (eylem, kâr); kırmızı yalnız zarar.
   Koyu tema html[data-tema="koyu"] (assets/tema.js, çizimden önce). */
:root {
  --zemin: #f5f6f8;
  --yuzey: #ffffff;
  --yuzey-2: #f0f2f5;
  --murekkep: #0f1b2d;
  --metin: #354052;
  --soluk: #5c6676;
  --cizgi: #e1e5eb;
  --marka: #13233f;
  --marka-metin: #e7ecf3;
  --marka-soluk: #a9b6c8;
  --vurgu: #0d7a5c;
  --vurgu-bas: #0a624a;
  --vurgu-yumusak: #e5f2ed;
  --vurgu-metin: #ffffff;
  --baglanti: #0b6a50;
  --kar: #0d7a5c;
  --zarar: #b42318;
  --golge: 0 1px 2px rgba(15, 27, 45, .06), 0 10px 30px rgba(15, 27, 45, .07);
  --odak: 0 0 0 3px rgba(13, 122, 92, .35);
  color-scheme: light;
}
:root[data-tema="koyu"] {
  --zemin: #0b111c;
  --yuzey: #121a28;
  --yuzey-2: #182234;
  --murekkep: #e8edf4;
  --metin: #c3ccd8;
  --soluk: #8f9bad;
  --cizgi: #243049;
  --marka: #0f1a2e;
  --marka-metin: #e8edf4;
  --marka-soluk: #93a1b5;
  --vurgu: #3fbf94;
  --vurgu-bas: #6fd3ae;
  --vurgu-yumusak: #12302a;
  --vurgu-metin: #06140f;
  --baglanti: #5fcfa6;
  --kar: #3fbf94;
  --zarar: #ff8a7a;
  --golge: 0 1px 2px rgba(0, 0, 0, .4), 0 10px 30px rgba(0, 0, 0, .35);
  --odak: 0 0 0 3px rgba(63, 191, 148, .45);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--zemin);
  color: var(--metin);
  font: 16px/1.65 "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
}
a { color: var(--baglanti); }
a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible { outline: none; box-shadow: var(--odak); border-radius: 8px; }
h1, h2, h3 { color: var(--murekkep); line-height: 1.2; margin: 0 0 12px; font-weight: 700; }
h1 { font-size: clamp(32px, 4.8vw, 48px); letter-spacing: -.025em; }
h2 { font-size: clamp(24px, 3.2vw, 32px); letter-spacing: -.015em; }
h3 { font-size: 17px; letter-spacing: -.005em; }
p { margin: 0 0 12px; }
.ic { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ---------- Üst çubuk ---------- */
.ust { position: sticky; top: 0; z-index: 10; background: var(--yuzey); border-bottom: 1px solid var(--cizgi); }
.ust .ic { display: flex; align-items: center; gap: 16px; min-height: 64px; }
.marka { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; letter-spacing: -.01em; color: var(--murekkep); text-decoration: none; }
.isaret { width: 28px; height: 28px; border-radius: 8px; background: var(--marka); flex: none; position: relative; }
:root[data-tema="koyu"] .isaret { background: #243a63; }
.isaret::after { content: ""; position: absolute; left: 7px; right: 7px; bottom: 7px; height: 4px; border-radius: 2px; background: var(--vurgu); }
.isaret::before { content: ""; position: absolute; left: 7px; width: 4px; bottom: 11px; height: 9px; border-radius: 2px; background: var(--vurgu); opacity: .7; }
.menu { display: flex; gap: 24px; margin-left: 16px; }
.menu a { color: var(--metin); text-decoration: none; font-weight: 500; font-size: 15px; }
.menu a:hover { color: var(--murekkep); }
.ust-sag { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.dil-link { font-weight: 600; font-size: 14px; text-decoration: none; padding: 6px 8px; color: var(--metin); }
.dil-link:hover { color: var(--murekkep); }
.ikon-btn { width: 38px; height: 38px; border-radius: 10px; border: 1px solid var(--cizgi); background: var(--yuzey); color: var(--murekkep); cursor: pointer; display: inline-grid; place-items: center; flex: none; }
.ikon-btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
:root[data-tema="koyu"] .ikon-ay, :root:not([data-tema="koyu"]) .ikon-gunes { display: none; }

/* ---------- Düğmeler ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 0 22px; border-radius: 10px; font: inherit; font-weight: 600; text-decoration: none; border: 1px solid transparent; cursor: pointer; white-space: nowrap; }
.btn.kucuk { min-height: 38px; padding: 0 14px; font-size: 14px; border-radius: 9px; }
.btn.birincil { background: var(--vurgu); color: var(--vurgu-metin); }
.btn.birincil:hover { background: var(--vurgu-bas); }
.btn.ikincil { background: var(--yuzey); color: var(--murekkep); border-color: var(--cizgi); }
.btn.ikincil:hover { border-color: var(--soluk); }

/* ---------- Hero ---------- */
.hero { padding: 72px 0 64px; background: linear-gradient(180deg, var(--yuzey) 0%, var(--zemin) 100%); border-bottom: 1px solid var(--cizgi); }
.hero .ic { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 56px; align-items: center; }
.kitle { font-size: 14px; font-weight: 600; color: var(--soluk); margin-bottom: 14px; }
.hero .alt { font-size: 18px; color: var(--metin); max-width: 34em; }
.eylemler { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 18px; }
.kosullar { font-size: 14px; color: var(--soluk); margin: 0; }
.kosullar strong { color: var(--murekkep); font-weight: 600; }

/* ---------- Mini hesaplayıcı ---------- */
.hesap { background: var(--yuzey); border: 1px solid var(--cizgi); border-radius: 18px; padding: 24px; box-shadow: var(--golge); }
.hesap h2 { font-size: 18px; margin-bottom: 4px; }
.hesap-bas { display: flex; align-items: center; justify-content: space-between; gap: 8px 12px; flex-wrap: wrap; margin-bottom: 4px; }
.hesap-bas h2 { margin: 0; }
.pb-sec { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600; color: var(--soluk); }
.pb-sec select { font: inherit; font-size: 14px; font-weight: 600; min-height: 36px; padding: 4px 8px; border: 1px solid var(--cizgi); border-radius: 8px; background: var(--zemin); color: var(--murekkep); }
.hesap .not { font-size: 13px; color: var(--soluk); margin-bottom: 16px; }
.alanlar { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; align-items: end; }
.alan { display: flex; flex-direction: column; gap: 4px; min-width: 0; font-size: 13px; font-weight: 600; color: var(--murekkep); }
.alan input { font: inherit; font-size: 16px; font-weight: 500; width: 100%; min-width: 0; min-height: 44px; padding: 8px 12px; border: 1px solid var(--cizgi); border-radius: 9px; background: var(--zemin); color: var(--murekkep); }
.alan input:focus { border-color: var(--vurgu); }
.alan input[aria-invalid="true"] { border-color: var(--zarar); }
.sonuclar { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 16px; }
.sonuc { background: var(--yuzey-2); border-radius: 12px; padding: 10px 12px; min-width: 0; }
.sonuc span { display: block; font-size: 12px; color: var(--soluk); font-weight: 600; }
.sonuc strong { display: block; font-size: 20px; color: var(--murekkep); overflow-wrap: anywhere; font-variant-numeric: tabular-nums; }
.sonuc.ana { grid-column: 1 / -1; }
.sonuc.ana strong { font-size: 30px; }
.sonuc.ana.zarar strong { color: var(--zarar); }
.sonuc.ana.kar strong { color: var(--kar); }
.oneri { margin: 12px 0 0; font-size: 14px; font-weight: 600; color: var(--murekkep); min-height: 1.6em; }
.oneri.zarar { color: var(--zarar); }
.hesap-alt { font-size: 12.5px; color: var(--soluk); margin: 12px 0 0; }

/* ---------- Bölümler ---------- */
.bolum { padding: 72px 0; }
.bolum + .bolum { border-top: 1px solid var(--cizgi); }
.bolum-bas { max-width: 42em; margin-bottom: 36px; }
.bolum-bas p { color: var(--soluk); font-size: 17px; margin: 0; }
.kalemler { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 48px; }
.kalem { padding: 20px 0; border-top: 1px solid var(--cizgi); display: grid; grid-template-columns: 36px minmax(0, 1fr); gap: 0 14px; }
.kalem-no { width: 28px; height: 28px; border-radius: 8px; background: var(--vurgu-yumusak); color: var(--vurgu); font-weight: 700; font-size: 14px; display: grid; place-items: center; margin-top: 1px; }
.kalem h3 { margin-bottom: 4px; }
.kalem p { margin: 0; font-size: 15.5px; }
.adimlar { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; counter-reset: adim; }
.adimlar li { counter-increment: adim; background: var(--yuzey); border: 1px solid var(--cizgi); border-radius: 14px; padding: 22px; }
.adimlar li::before { content: counter(adim); display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--marka); color: var(--marka-metin); font-weight: 700; font-size: 14px; margin-bottom: 12px; }
:root[data-tema="koyu"] .adimlar li::before { background: #243a63; }
.adimlar h3 { margin-bottom: 6px; }
.adimlar p { margin: 0; font-size: 15px; }

/* ---------- Fiyat (lacivert bant) ---------- */
.fiyat-bant { background: var(--marka); color: var(--marka-soluk); padding: 72px 0; }
.fiyat-bant .ic { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 440px); gap: 48px; align-items: center; }
.fiyat-bant h2 { color: var(--marka-metin); }
.fiyat-bant .aciklama { font-size: 17px; margin: 0 0 16px; }
.fiyat-bant .aciklama:last-child { margin: 0; }
.fiyat-kart { background: var(--yuzey); border-radius: 18px; padding: 28px; box-shadow: var(--golge); color: var(--metin); }
.fiyat-ust { display: flex; align-items: baseline; gap: 10px; margin-bottom: 4px; }
.fiyat { font-size: 46px; font-weight: 800; color: var(--murekkep); line-height: 1; letter-spacing: -.02em; margin: 0; }
.fiyat-tur { font-weight: 600; color: var(--soluk); }
.fiyat-alt { color: var(--soluk); font-size: 14px; margin-bottom: 20px; }
.icerik { list-style: none; padding: 0; margin: 0 0 24px; display: grid; gap: 10px; }
.icerik li { padding-left: 28px; position: relative; }
.icerik li::before { content: ""; position: absolute; left: 2px; top: 7px; width: 12px; height: 7px; border-left: 2px solid var(--vurgu); border-bottom: 2px solid var(--vurgu); transform: rotate(-45deg); }
.fiyat-kart .btn { width: 100%; }
.fiyat-kart .kucuk-not { font-size: 13px; color: var(--soluk); margin: 14px 0 0; }

/* ---------- SSS ---------- */
.sss { max-width: 820px; }
.sss details { border-bottom: 1px solid var(--cizgi); }
.sss details:first-of-type { border-top: 1px solid var(--cizgi); }
.sss summary { cursor: pointer; font-weight: 600; color: var(--murekkep); padding: 18px 0; list-style: none; font-size: 16.5px; }
.sss summary::-webkit-details-marker { display: none; }
.sss summary::after { content: "+"; float: right; color: var(--soluk); font-weight: 400; font-size: 22px; line-height: 1; }
.sss details[open] summary::after { content: "–"; }
.sss details p { margin: 0 0 18px; max-width: 44em; }

/* ---------- Yasal sayfalar ---------- */
.yasal { padding: 48px 0 64px; }
.yasal .ic { max-width: 780px; }
.yasal section + section { margin-top: 40px; padding-top: 32px; border-top: 1px solid var(--cizgi); }
.yasal h2 { font-size: 20px; margin-top: 24px; }
.yasal ul { padding-left: 20px; margin: 0 0 12px; }
.yasal .guncel { color: var(--soluk); font-size: 14px; }

/* ---------- Alt bilgi ---------- */
.alt-bilgi { border-top: 1px solid var(--cizgi); background: var(--yuzey); padding: 28px 0 40px; font-size: 14px; color: var(--soluk); }
.alt-bilgi .ic { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; justify-content: space-between; }
.alt-bilgi nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.alt-bilgi a { color: var(--metin); text-decoration: none; }
.alt-bilgi a:hover { color: var(--murekkep); text-decoration: underline; }

/* ---------- 404 ---------- */
.kutu-sayfa { min-height: 70vh; display: grid; place-items: center; padding: 40px 20px; }
.kutu { width: 100%; max-width: 520px; background: var(--yuzey); border: 1px solid var(--cizgi); border-radius: 18px; padding: 28px; }
.kutu section + section { margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--cizgi); }

/* ---------- Duyarlı ---------- */
@media (max-width: 900px) {
  .hero .ic, .fiyat-bant .ic { grid-template-columns: minmax(0, 1fr); gap: 36px; }
  .kalemler { grid-template-columns: minmax(0, 1fr); }
  .adimlar { grid-template-columns: minmax(0, 1fr); }
  .menu { display: none; }
}
@media (max-width: 600px) {
  .ic { padding: 0 16px; }
  .hero { padding: 40px 0 40px; }
  .ust .ic { gap: 8px; }
  .ust-sag .ust-satin { display: none; } /* telefonda satın alma sayfa içindeki düğmelerde */
  .marka { font-size: 17px; }
  .eylemler .btn { flex: 1 1 auto; }
  .bolum, .fiyat-bant { padding: 48px 0; }
  .fiyat { font-size: 40px; }
}
@media (max-width: 380px) {
  .alanlar { grid-template-columns: minmax(0, 1fr); }
}