/* =========================================================
   OOS — Fatura, Aidat ve Kira Ödeme Sistemi sayfa modülü
   Tüm kurallar .oos-sayfa altında kapsanır (tema ile çakışmaz)
   ========================================================= */

.oos-sayfa {
  --oos-navy: #0b2a4a;
  --oos-blue: #1868db;
  --oos-teal: #0ea394;
  --oos-ink: #10233d;
  --oos-ink-soft: #55677f;
  --oos-bg: #ffffff;
  --oos-bg-alt: #f6f8fb;
  --oos-card: #ffffff;
  --oos-line: #e4e9f0;
  --oos-radius: 14px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Inter", Arial, sans-serif;
  color: var(--oos-ink);
  background: var(--oos-bg);
  line-height: 1.55;
  overflow-x: hidden;
}

.oos-sayfa *,
.oos-sayfa *::before,
.oos-sayfa *::after {
  box-sizing: border-box;
}

.oos-sayfa img { max-width: 100%; display: block; }

.oos-container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

.oos-section { padding: 72px 0; }
.oos-section--alt { background: var(--oos-bg-alt); }

.oos-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--oos-teal);
  margin: 0 0 12px;
}

.oos-h2 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--oos-navy);
  margin: 0 0 14px;
}

.oos-lead {
  font-size: 16.5px;
  color: var(--oos-ink-soft);
  max-width: 640px;
  margin: 0;
}

/* ---------- HERO (beyaz) ---------- */
.oos-hero {
  background: var(--oos-bg);
  padding: 72px 0 64px;
  border-bottom: 1px solid var(--oos-line);
}
.oos-hero__grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.oos-hero h1 {
  font-size: clamp(28px, 3.6vw, 40px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--oos-navy);
  margin: 0 0 18px;
}
.oos-hero p {
  font-size: 17px;
  color: var(--oos-ink-soft);
  max-width: 520px;
  margin: 0 0 28px;
}
.oos-hero__cta { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }

.oos-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease, border-color .15s ease;
}
.oos-btn--primary {
  background: var(--oos-navy);
  color: #fff;
}
.oos-btn--primary:hover { transform: translateY(-1px); background: #0f3560; }
.oos-btn--ghost {
  background: transparent;
  color: var(--oos-navy);
  border-color: var(--oos-line);
}
.oos-btn--ghost:hover { border-color: var(--oos-blue); color: var(--oos-blue); }

.oos-hero__panel {
  background: var(--oos-card);
  border: 1px solid var(--oos-line);
  border-radius: var(--oos-radius);
  padding: 22px;
  box-shadow: 0 16px 40px -20px rgba(11, 42, 74, 0.18);
}
.oos-hero__panel-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 12px 0;
  border-bottom: 1px solid var(--oos-line);
  font-size: 14px;
}
.oos-hero__panel-row:last-child { border-bottom: none; font-weight: 700; }
.oos-hero__panel-row span:first-child { color: var(--oos-ink-soft); }
.oos-hero__panel-row span:last-child { font-weight: 700; color: var(--oos-ink); }
.oos-tag {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 100px;
}
.oos-tag--ok { background: #e5f6f2; color: #0b7d6f; }
.oos-tag--wait { background: #fdf1de; color: #a9740f; }

/* ---------- NEDEN BU SİSTEM (sade + görsel) ---------- */
.oos-neden {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.oos-neden__liste {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}
.oos-neden__liste li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 12px;
  font-size: 15.5px;
  color: var(--oos-ink);
}
.oos-neden__liste li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--oos-teal);
}
.oos-neden__gorsel img {
  width: 100%;
  border-radius: var(--oos-radius);
  border: 1px solid var(--oos-line);
}
.oos-neden__placeholder {
  border: 1.5px dashed var(--oos-line);
  border-radius: var(--oos-radius);
  min-height: 260px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  color: #a7b3c4;
  background: var(--oos-bg-alt);
  text-align: center;
  padding: 24px;
  font-size: 13px;
}

/* ---------- NASIL ÇALIŞIR (ok ile) ---------- */
.oos-adim-siram {
  display: flex;
  align-items: stretch;
  gap: 4px;
  margin-top: 40px;
  overflow-x: auto;
  padding-bottom: 6px;
}
.oos-adim {
  background: var(--oos-card);
  border: 1px solid var(--oos-line);
  border-radius: var(--oos-radius);
  padding: 24px 22px;
  flex: 1 1 0;
  min-width: 190px;
}
.oos-adim__no {
  font-size: 13px;
  font-weight: 800;
  color: var(--oos-teal);
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}
.oos-adim h4 { margin: 0 0 8px; font-size: 16px; font-weight: 800; color: var(--oos-navy); }
.oos-adim p { margin: 0; font-size: 14px; color: var(--oos-ink-soft); }
.oos-adim__ok {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #b9c4d3;
  padding: 0 2px;
}

/* ---------- KİMLER KULLANABİLİR (sekmeli/tab tasarım) ---------- */
.oos-tabs {
  margin-top: 40px;
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 0;
  border: 1px solid var(--oos-line);
  border-radius: var(--oos-radius);
  overflow: hidden;
  background: var(--oos-card);
}
.oos-tabs__nav {
  display: flex;
  flex-direction: column;
  background: var(--oos-bg-alt);
  border-right: 1px solid var(--oos-line);
}
.oos-tabs__navitem {
  appearance: none;
  border: none;
  background: transparent;
  text-align: left;
  font-size: 15px;
  font-weight: 700;
  color: var(--oos-ink-soft);
  padding: 18px 22px;
  cursor: pointer;
  border-left: 3px solid transparent;
  border-bottom: 1px solid var(--oos-line);
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.oos-tabs__navitem:last-child { border-bottom: none; }
.oos-tabs__navitem:hover { background: #eef2f8; color: var(--oos-navy); }
.oos-tabs__navitem.is-active {
  background: var(--oos-card);
  color: var(--oos-navy);
  border-left-color: var(--oos-teal);
}
.oos-tabs__panels { position: relative; }
.oos-tabs__panel {
  display: none;
  padding: 40px 40px;
}
.oos-tabs__panel.is-active { display: block; }
.oos-tabs__panel h3 {
  margin: 0 0 12px;
  font-size: 21px;
  font-weight: 800;
  color: var(--oos-navy);
}
.oos-tabs__panel p {
  margin: 0;
  font-size: 15.5px;
  color: var(--oos-ink-soft);
  max-width: 520px;
}

/* ---------- SİSTEMDEN NE YAPILABİLİR (nokta sistemli carousel) ---------- */
.oos-carousel { margin-top: 40px; }
.oos-carousel__viewport {
  overflow: hidden;
  width: 100%;
}
.oos-carousel__track {
  display: flex;
  gap: 16px;
  transition: transform .4s ease;
  will-change: transform;
}
.oos-carousel__kart {
  flex: 0 0 calc(33.333% - 11px);
  background: var(--oos-card);
  border: 1px solid var(--oos-line);
  border-radius: var(--oos-radius);
  padding: 22px;
}
.oos-carousel__ikon {
  width: 34px; height: 34px;
  border-radius: 9px;
  background: #eaf1fc;
  color: var(--oos-blue);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px;
}
.oos-carousel__kart h4 { margin: 0 0 8px; font-size: 15px; font-weight: 800; color: var(--oos-navy); }
.oos-carousel__kart p { margin: 0; font-size: 13.8px; color: var(--oos-ink-soft); }

.oos-carousel__kontrol {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-top: 26px;
}
.oos-carousel__ok {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--oos-line);
  background: var(--oos-card);
  color: var(--oos-navy);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: border-color .15s ease, color .15s ease;
}
.oos-carousel__ok:hover { border-color: var(--oos-blue); color: var(--oos-blue); }
.oos-carousel__noktalar { display: flex; align-items: center; gap: 9px; }
.oos-carousel__nokta {
  width: 8px; height: 8px;
  border-radius: 50%;
  border: none;
  background: var(--oos-line);
  cursor: pointer;
  padding: 0;
  transition: background .15s ease, transform .15s ease;
}
.oos-carousel__nokta.is-active {
  background: var(--oos-teal);
  transform: scale(1.3);
}

/* ---------- RESPONSIVE ---------- */
@media (max-width: 900px) {
  .oos-hero__grid { grid-template-columns: 1fr; }
  .oos-hero__panel { order: -1; }
  .oos-neden { grid-template-columns: 1fr; }
  .oos-neden__gorsel { order: -1; }
  .oos-adim-siram { flex-direction: column; }
  .oos-adim__ok { transform: rotate(90deg); padding: 6px 0; align-self: center; }
  .oos-tabs { grid-template-columns: 1fr; }
  .oos-tabs__nav { flex-direction: row; overflow-x: auto; border-right: none; border-bottom: 1px solid var(--oos-line); }
  .oos-tabs__navitem { border-left: none; border-bottom: 3px solid transparent; white-space: nowrap; }
  .oos-tabs__navitem.is-active { border-left-color: transparent; border-bottom-color: var(--oos-teal); }
  .oos-tabs__panel { padding: 28px 24px; }
  .oos-carousel__kart { flex: 0 0 calc(50% - 8px); }
}
@media (max-width: 560px) {
  .oos-section { padding: 48px 0; }
  .oos-hero { padding: 48px 0 44px; }
  .oos-carousel__kart { flex: 0 0 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .oos-sayfa * { transition: none !important; }
}