:root {
  --background: #fbfaff;
  --surface: #ffffff;
  --surface-soft: #f5f2ff;
  --text: #292533;
  --muted: #6e6879;
  --primary: #7257a8;
  --primary-dark: #5d438f;
  --border: #e7e1f1;
  --shadow: 0 18px 50px rgba(70, 50, 110, 0.09);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, var(--background), #ffffff 55%, #f8f5ff);
  line-height: 1.65;
}
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }

/* Language visibility: the active language keeps its natural display type. */
html:not(.lang-en) [data-lang="en"],
html.lang-en [data-lang="tr"] {
  display: none !important;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid rgba(231, 225, 241, 0.92);
  background: rgba(251, 250, 255, 0.9);
  backdrop-filter: blur(16px);
}
.navbar {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: var(--text);
  text-decoration: none;
  font-weight: 850;
  letter-spacing: -0.02em;
}
.brand-mark {
  width: 48px;
  height: 48px;
  flex: 0 0 48px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 16px;
  color: var(--primary-dark);
  background: var(--surface-soft);
  font-size: 17px;
  font-weight: 900;
}
.brand-name { white-space: nowrap; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
}
.nav-link {
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
  font-weight: 750;
  transition: color 160ms ease;
}
.nav-link:hover { color: var(--primary-dark); }
.language-button {
  min-width: 52px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--primary-dark);
  background: var(--surface);
  font: inherit;
  font-size: 15px;
  font-weight: 850;
  cursor: pointer;
}

.hero { padding: 94px 0 70px; }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  align-items: center;
  gap: 58px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 13px;
  border-radius: 999px;
  color: var(--primary-dark);
  background: var(--surface-soft);
  font-size: 13px;
  font-weight: 850;
  letter-spacing: 0.02em;
}
h1, h2, h3, p { overflow-wrap: anywhere; }
.hero h1 {
  margin: 20px 0 18px;
  font-size: clamp(44px, 7vw, 78px);
  line-height: 1.03;
  letter-spacing: -0.05em;
}
.lead {
  max-width: 750px;
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}
.button-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 30px;
}
.button {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 15px;
  text-align: center;
  text-decoration: none;
  line-height: 1.2;
  font-weight: 850;
}
.button-primary {
  color: #ffffff;
  background: var(--primary);
  box-shadow: 0 12px 28px rgba(114, 87, 168, 0.24);
}
.button-secondary {
  color: var(--primary-dark);
  border-color: var(--border);
  background: var(--surface);
}
.hero-card,
.info-card,
.content-card {
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.hero-card {
  padding: 34px;
  border-radius: 32px;
}
.hero-card h2 { margin: 0 0 10px; font-size: 30px; line-height: 1.2; }
.hero-card p { margin: 0; color: var(--muted); }
.tag-list { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 22px; }
.tag {
  padding: 7px 11px;
  border-radius: 999px;
  color: var(--primary-dark);
  background: var(--surface-soft);
  font-size: 13px;
  font-weight: 750;
}

.section { padding: 74px 0; }
.section-heading { max-width: 790px; margin-bottom: 32px; }
.section-heading h2 {
  margin: 0 0 12px;
  font-size: clamp(34px, 5vw, 50px);
  line-height: 1.12;
  letter-spacing: -0.04em;
}
.section-heading p { margin: 0; color: var(--muted); font-size: 17px; }
.cards-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.info-card { min-width: 0; padding: 27px; border-radius: 25px; }
.info-card h3 { margin: 0 0 10px; font-size: 21px; line-height: 1.3; }
.info-card p { margin: 0; color: var(--muted); }

.app-section { background: var(--surface-soft); }
.app-panel {
  display: grid;
  grid-template-columns: minmax(250px, 0.8fr) minmax(0, 1.2fr);
  align-items: center;
  gap: 44px;
  padding: 40px;
  border: 1px solid var(--border);
  border-radius: 34px;
  background: var(--surface);
  box-shadow: var(--shadow);
}
.app-logo-card {
  width: min(250px, 68vw);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  margin-inline: auto;
  padding: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 30%;
  background: linear-gradient(145deg, #faf8ff, #ebe4f8);
}
.app-logo-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 24%;
}
.app-panel h2 { margin: 7px 0 12px; font-size: 44px; line-height: 1.15; }
.app-panel p { margin: 0; color: var(--muted); }
.notice {
  margin: 20px 0;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface-soft);
}
.text-links { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 22px; }
.text-link { color: var(--primary-dark); font-weight: 850; text-decoration: none; }

.contact-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 38px;
  border-radius: 30px;
  color: #ffffff;
  background: var(--text);
}
.contact-panel h2 { margin: 0; font-size: 34px; }
.contact-panel p { margin: 8px 0 0; color: #d9d3e3; }
.contact-email { max-width: 100%; overflow-wrap: anywhere; }

.page-hero { padding: 84px 0 38px; }
.page-title {
  margin: 18px 0 10px;
  font-size: clamp(42px, 6vw, 66px);
  line-height: 1.05;
  letter-spacing: -0.045em;
}
.page-subtitle { margin: 0; color: var(--muted); }
.content-section { padding: 0 0 78px; }
.content-card { padding: clamp(27px, 5vw, 50px); border-radius: 28px; }
.content-card h2 { margin: 36px 0 10px; line-height: 1.3; }
.content-card h2:first-child { margin-top: 0; }
.content-card p, .content-card li { color: #575160; }
.content-card a { color: var(--primary-dark); font-weight: 750; }

.site-footer { padding: 32px 0 46px; color: var(--muted); font-size: 14px; }
.footer-row { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }

@media (max-width: 880px) {
  .hero-grid,
  .app-panel { grid-template-columns: 1fr; }
  .hero { padding-top: 68px; }
  .cards-grid { grid-template-columns: 1fr; }
  .nav-link { display: none; }
  .contact-panel { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 560px) {
  .app-logo-card { width: min(205px, 66vw); padding: 10px; }
  .container { width: min(100% - 28px, 1120px); }
  .navbar { min-height: 68px; }
  .brand-mark { width: 42px; height: 42px; flex-basis: 42px; border-radius: 14px; font-size: 15px; }
  .brand-name { font-size: 15px; white-space: normal; line-height: 1.2; }
  .hero-card, .app-panel, .content-card { padding: 24px; border-radius: 25px; }
  .section { padding: 58px 0; }
  .button-row { align-items: stretch; }
  .button { width: 100%; }
  .contact-panel { padding: 28px; }
  .contact-panel .button { width: 100%; }
}