:root {
  color-scheme: dark;
  --bg: #1e1e1e;
  --fg: #ffffff;
  --muted: #8c8c8c;
  --accent: #8ccbf2;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--fg);
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; overflow: hidden; background: var(--bg); }
main {
  height: 100vh; height: 100dvh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 1.25rem; padding: 1rem; text-align: center; overflow: hidden;
}
h1 { margin: 0; font-size: clamp(2rem, 9vw, 4.5rem); font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; }
p { margin: 0; }
.tagline { color: var(--muted); font-size: clamp(0.75rem, 2.6vw, 1rem); letter-spacing: 0.08em; text-transform: uppercase; }
.actions { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 0.75rem 1rem; margin-top: 1rem; }
.btn {
  display: inline-block; border: 1px solid var(--fg); border-radius: 3px;
  padding: 0.7rem 1.4rem; color: var(--fg); text-decoration: none;
  text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.9rem;
}
.btn:hover { background: var(--fg); color: var(--bg); }
.btn:focus-visible { outline: 1px solid var(--accent); outline-offset: 2px; }
/* birincil: büyük düğme; ikincil: küçük bağlantı */
.actions[data-primary] .btn { order: 1; }
.actions[data-primary="windows"] .btn[data-platform="windows"],
.actions[data-primary="mac"] .btn[data-platform="mac"] {
  order: 0; flex-basis: 100%; max-width: 22rem; padding: 1.1rem 2rem; font-size: clamp(1rem, 4vw, 1.4rem);
}
.actions[data-primary="windows"] .btn[data-platform="mac"],
.actions[data-primary="mac"] .btn[data-platform="windows"] {
  border: 0; padding: 0.25rem; color: var(--muted); font-size: 0.75rem; text-decoration: underline;
}
.actions[data-primary="windows"] .btn[data-platform="mac"]:hover,
.actions[data-primary="mac"] .btn[data-platform="windows"]:hover { background: none; color: var(--fg); }
.actions[data-primary="none"] { display: none; }
.mobile { color: var(--muted); letter-spacing: 0.08em; text-transform: uppercase; font-size: 0.9rem; }
.mobile[hidden] { display: none; }
.version { color: var(--muted); font-size: 0.7rem; letter-spacing: 0.08em; min-height: 1em; }