/* D4U · coming soon. One centered logo and a short message. Light and dark with js/theme.js. */
:root {
  color-scheme: light dark;
  --bg: #FFFFFF; --ink: #0B0D10; --muted: #586373; --line: #DCE1E8; --blue: #1652F0;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  --glow: radial-gradient(60% 50% at 50% 0%, rgba(22, 82, 240, .12), transparent 70%);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --bg: #0B0D10; --ink: #F1F3F6; --muted: #9AA3B0; --line: #262B33; --blue: #5B87FF;
    --glow: radial-gradient(60% 50% at 50% 0%, rgba(91, 135, 255, .16), transparent 70%); }
  :root:not([data-theme="light"]) .logo .light, :root:not([data-theme="light"]) .theme-toggle .i-moon { display: none; }
  :root:not([data-theme="light"]) .logo .dark, :root:not([data-theme="light"]) .theme-toggle .i-sun { display: block; }
}
:root[data-theme="dark"] { color-scheme: dark; --bg: #0B0D10; --ink: #F1F3F6; --muted: #9AA3B0; --line: #262B33; --blue: #5B87FF;
  --glow: radial-gradient(60% 50% at 50% 0%, rgba(91, 135, 255, .16), transparent 70%); }
:root[data-theme="dark"] .logo .light, :root[data-theme="dark"] .theme-toggle .i-moon { display: none; }
:root[data-theme="dark"] .logo .dark, :root[data-theme="dark"] .theme-toggle .i-sun { display: block; }
:root[data-theme="light"] { color-scheme: light; }

* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; display: flex; flex-direction: column; min-height: 100vh; min-height: 100svh;
  background: var(--glow), var(--bg); color: var(--ink); font: 400 17px/1.5 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; }

.tools { display: flex; justify-content: flex-end; align-items: center; gap: 10px; padding: 16px; }
.theme-toggle { display: inline-grid; place-items: center; width: 38px; height: 38px; padding: 0; border: 1px solid var(--line); border-radius: 50%; background: transparent; color: var(--ink); cursor: pointer; }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .i-sun { display: none; }
.lang { font-size: 14px; font-weight: 600; text-decoration: none; padding: 7px 14px; border: 1px solid var(--line); border-radius: 999px; }
.theme-toggle:hover, .lang:hover { border-color: var(--blue); color: var(--blue); }
.theme-toggle:focus-visible, .lang:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }

main { flex: 1; display: grid; place-items: center; padding: 24px 16px 48px; text-align: center; }
.logo img { display: block; width: clamp(180px, 40vw, 280px); height: auto; margin: 0 auto; }
.logo .dark { display: none; }
h1 { margin: 36px 0 0; font-size: clamp(30px, 4.4vw, 44px); line-height: 1.1; letter-spacing: -0.02em; }
.lead { max-width: 36ch; margin: 14px auto 0; color: var(--muted); font-size: clamp(18px, 1.6vw, 20px); }
.status { display: inline-flex; align-items: center; gap: 8px; margin-top: 28px; padding: 6px 14px; border: 1px solid var(--line); border-radius: 999px; font-size: 13px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; }
.status::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--blue); animation: pulse 1.8s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .3; } }
@media (prefers-reduced-motion: reduce) { .status::before { animation: none; } }

footer { padding: 20px 16px 28px; text-align: center; color: var(--muted); font-size: 14px; }
footer a { text-decoration: none; font-weight: 600; }
footer a:hover { color: var(--blue); }