:root {
  --teal-50: #F0FDFA;
  --teal-100: #CCFBF1;
  --teal-500: #14B8A6;
  --teal-600: #0D9488;
  --teal-700: #0F766E;
  --teal-900: #134E4A;
  --amber-500: #F59E0B;
  --slate-50: #F8FAFC;
  --slate-100: #F1F5F9;
  --slate-200: #E2E8F0;
  --slate-400: #94A3B8;
  --slate-500: #64748B;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-900: #0F172A;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.07), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --shadow-lg: 0 10px 25px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.05);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--slate-900);
  background: #fff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--teal-700); text-decoration: none; }
a:hover { color: var(--teal-600); }

img, svg { display: block; max-width: 100%; }

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* NAV */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--slate-100);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--slate-900);
  font-weight: 700;
}
.brand-mark { display: inline-flex; }
.brand-name { font-size: 18px; letter-spacing: -0.01em; }
.nav-links {
  display: flex;
  gap: 28px;
}
.nav-links a {
  color: var(--slate-600);
  font-size: 14px;
  font-weight: 500;
}
.nav-links a:hover { color: var(--slate-900); }

@media (max-width: 600px) {
  .nav-links { gap: 16px; }
  .nav-links a:nth-child(2) { display: none; }
}

/* HERO */
.hero {
  position: relative;
  padding: 80px 0 100px;
  background: linear-gradient(180deg, #F0FDFA 0%, #FFFFFF 100%);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 18% 22%, rgba(20, 184, 166, 0.15), transparent 35%),
    radial-gradient(circle at 80% 80%, rgba(245, 158, 11, 0.08), transparent 35%);
  pointer-events: none;
}
.hero .container { position: relative; max-width: 760px; text-align: center; }

.hero-icon {
  display: block;
  width: 88px;
  height: 88px;
  margin: 0 auto 28px;
  border-radius: 20px;
  box-shadow: 0 12px 32px rgba(13, 148, 136, 0.28);
}

.pill {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--teal-50);
  color: var(--teal-700);
  border: 1px solid var(--teal-100);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(36px, 5.5vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.025em;
  font-weight: 800;
  margin-bottom: 20px;
}
.hero h1 .accent {
  color: var(--teal-600);
  display: inline-block;
}

.lede {
  font-size: 18px;
  color: var(--slate-600);
  max-width: 600px;
  margin: 0 auto 32px;
  line-height: 1.6;
}

.cta-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.offline-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 0 auto 36px;
  color: var(--slate-500);
  font-size: 14px;
  font-weight: 500;
}
.offline-note svg { color: var(--teal-600); flex-shrink: 0; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--teal-600);
  color: #fff;
  box-shadow: var(--shadow-md);
}
.btn-primary:hover {
  background: var(--teal-700);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
  color: #fff;
}
.brands {
  font-size: 13px;
  color: var(--slate-400);
  letter-spacing: 0.02em;
}

/* SECTION */
.section { padding: 96px 0; }
.section-title {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
  text-align: center;
  margin-bottom: 12px;
}
.section-lede {
  text-align: center;
  font-size: 17px;
  color: var(--slate-500);
  max-width: 560px;
  margin: 0 auto 56px;
  line-height: 1.6;
}

/* FEATURES */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}
.feature {
  padding: 28px;
  background: #fff;
  border: 1px solid var(--slate-100);
  border-radius: var(--radius-lg);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.feature:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--slate-200);
}
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.feature-icon svg { width: 24px; height: 24px; }
.feature h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--slate-900);
  letter-spacing: -0.01em;
}
.feature p {
  font-size: 15px;
  color: var(--slate-600);
  line-height: 1.6;
}

/* PRIVACY */
.privacy-section {
  background: linear-gradient(160deg, var(--teal-900) 0%, var(--teal-700) 100%);
  color: #fff;
}
.privacy-card {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.privacy-icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  color: #fff;
}
.privacy-icon svg { width: 30px; height: 30px; }
.privacy-section h2 {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: #fff;
}
.privacy-section > .container > .privacy-card > p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.7;
  margin-bottom: 28px;
}
.privacy-list {
  list-style: none;
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 32px;
  text-align: left;
  margin: 0 auto 32px;
  padding: 0;
}
.privacy-list li {
  position: relative;
  padding-left: 28px;
  color: rgba(255, 255, 255, 0.92);
  font-size: 15px;
}
.privacy-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 12px;
}
@media (max-width: 540px) {
  .privacy-list { grid-template-columns: 1fr; }
}
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #fff;
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
  padding-bottom: 2px;
  transition: border-color 0.15s ease;
}
.link-arrow:hover { border-color: #fff; color: #fff; }

/* DOWNLOAD CTA */
.section-cta { padding: 96px 0 120px; background: var(--slate-50); }
.store-row {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.store-card {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  background: #fff;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-md);
  padding: 14px 22px;
  min-width: 220px;
  box-shadow: var(--shadow-sm);
  opacity: 0.7;
}
.store-card-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--slate-900);
}
.store-card-icon svg { width: 30px; height: 30px; }
.store-card-pretitle {
  display: block;
  font-size: 11px;
  color: var(--slate-500);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.store-card strong {
  font-size: 17px;
  font-weight: 700;
  color: var(--slate-900);
}
.cta-note {
  text-align: center;
  font-size: 13px;
  color: var(--slate-500);
  margin-top: 16px;
}

/* FOOTER */
footer {
  background: #fff;
  border-top: 1px solid var(--slate-100);
  padding: 56px 0 32px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}
.footer-brand .brand { margin-bottom: 12px; }
.footer-tagline {
  font-size: 14px;
  color: var(--slate-500);
  max-width: 260px;
}
.footer-col h4 {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--slate-400);
  margin-bottom: 14px;
  font-weight: 700;
}
.footer-col a {
  display: block;
  color: var(--slate-600);
  font-size: 14px;
  margin-bottom: 10px;
}
.footer-col a:hover { color: var(--slate-900); }
.footer-bottom {
  border-top: 1px solid var(--slate-100);
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--slate-400);
}
.disclaimer { line-height: 1.6; }

@media (max-width: 720px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 480px) {
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .section { padding: 64px 0; }
  .hero { padding: 56px 0 72px; }
}

/* LEGAL PAGES (privacy.html, kvkk.html, terms.html, support.html) */
.legal-page {
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 24px 96px;
}
.legal-page h1 {
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  color: var(--slate-900);
}
.legal-page .meta {
  color: var(--slate-500);
  font-size: 14px;
  margin-bottom: 32px;
}
.legal-page h2 {
  font-size: 20px;
  font-weight: 700;
  margin-top: 36px;
  margin-bottom: 12px;
  color: var(--slate-900);
}
.legal-page h3 {
  font-size: 16px;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 8px;
  color: var(--slate-700);
}
.legal-page p, .legal-page li {
  color: var(--slate-700);
  font-size: 15px;
  line-height: 1.7;
}
.legal-page ul { padding-left: 24px; margin-bottom: 12px; }
.legal-page li { margin-bottom: 6px; }
.legal-page hr {
  border: none;
  border-top: 1px solid var(--slate-200);
  margin: 56px 0;
}
.legal-page .lang-switch {
  display: inline-block;
  padding: 4px 12px;
  background: var(--teal-50);
  border: 1px solid var(--teal-100);
  border-radius: 999px;
  color: var(--teal-700);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--teal-600);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 24px;
}
.back-link:hover { color: var(--teal-700); }

/* HOW IT WORKS — 3-step section */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 28px 24px;
  background: #fff;
  border: 1px solid var(--slate-100);
  border-radius: var(--radius-lg);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.step:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--slate-200);
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--teal-600);
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 16px;
  box-shadow: 0 4px 8px rgba(13, 148, 136, 0.25);
}
.step h3 {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
  color: var(--slate-900);
}
.step p {
  font-size: 15px;
  color: var(--slate-600);
  line-height: 1.6;
}

/* SECTION VARIANTS */
.section-light { background: var(--slate-50); }

/* FEATURE GRID 4-COL VARIANT */
.feature-grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}
.feature-grid-4 .feature {
  padding: 24px;
}
.feature-grid-4 .feature p { font-size: 14px; }

/* LANGUAGE TOGGLE */
html[lang="en"] [data-lang="tr"],
html[lang="tr"] [data-lang="en"] {
  display: none !important;
}

.lang-toggle {
  display: inline-flex;
  margin-left: 8px;
  border: 1px solid var(--slate-200);
  border-radius: 999px;
  padding: 2px;
  background: #fff;
}
.lang-toggle button {
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  background: transparent;
  border: none;
  cursor: pointer;
  border-radius: 999px;
  color: var(--slate-500);
  transition: background 0.15s ease, color 0.15s ease;
}
.lang-toggle button:hover { color: var(--slate-900); }
.lang-toggle button.is-active {
  background: var(--teal-600);
  color: #fff;
}

@media (max-width: 600px) {
  .nav-links { gap: 12px; }
  .lang-toggle { margin-left: 4px; }
  .lang-toggle button { padding: 4px 8px; font-size: 11px; }
}