:root {
  color-scheme: light dark;
  --accent: #10a076;
  --bg: #f5f7f6;
  --card: #ffffff;
  --text: #111827;
  --muted: #64748b;
  --border: #dce5e1;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c1110;
    --card: #151c1a;
    --text: #f5f7f6;
    --muted: #a9b7b2;
    --border: #29332f;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html[data-language="tr"] [data-lang="en"],
html[data-language="en"] [data-lang="tr"] {
  display: none !important;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}
a { color: var(--accent); }
.wrap {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
}
header {
  padding: 28px 0 18px;
}
.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0;
  text-decoration: none;
  color: var(--text);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
}
.brand span { color: var(--accent); }
.language-switcher {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card);
}
.language-button {
  min-width: 44px;
  border: 0;
  border-radius: 9px;
  padding: 7px 10px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}
.language-button[aria-pressed="true"] {
  background: var(--accent);
  color: #ffffff;
}
.language-button:focus-visible,
.button:focus-visible,
a:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 45%, transparent);
  outline-offset: 3px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 28px;
  margin-bottom: 20px;
}
h1 { margin: 0 0 12px; font-size: clamp(30px, 7vw, 46px); line-height: 1.15; }
h2 { margin-top: 30px; font-size: 22px; }
h3 { margin-top: 24px; font-size: 18px; }
p, li { color: var(--text); }
.muted { color: var(--muted); }
.actions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 12px;
  margin-top: 24px;
}
.button {
  display: block;
  border-radius: 14px;
  padding: 14px 16px;
  background: var(--accent);
  color: white;
  text-decoration: none;
  font-weight: 700;
  text-align: center;
}
.button.secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.notice {
  border-left: 4px solid var(--accent);
  padding: 12px 16px;
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border-radius: 0 12px 12px 0;
}
footer {
  color: var(--muted);
  text-align: center;
  padding: 10px 0 40px;
  font-size: 14px;
}
ul { padding-left: 22px; }
code {
  background: color-mix(in srgb, var(--text) 8%, transparent);
  padding: 2px 6px;
  border-radius: 6px;
}
@media (max-width: 520px) {
  .card { padding: 22px 18px; border-radius: 18px; }
  .header-row { gap: 12px; }
  .brand { font-size: 22px; }
}