:root {
  color-scheme: dark;
  --bg: #030508;
  --panel: rgba(11, 15, 23, 0.82);
  --line: rgba(226, 232, 255, 0.16);
  --text: #f4f6ff;
  --muted: #8e95a8;
  --accent: #a9b8ff;
  --accent-strong: #d5dcff;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; margin: 0; }
body {
  overflow: hidden;
  background: radial-gradient(circle at 50% 44%, rgba(93, 75, 166, 0.14), transparent 32rem), var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
button, input { font: inherit; }

.language-switcher {
  position: fixed;
  top: 18px;
  right: 20px;
  z-index: 10;
  display: flex;
  gap: 6px;
}

.language-button {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border: 1px solid transparent;
  border-radius: 9px;
  padding: 6px 8px;
  background: transparent;
  color: var(--muted);
  font-size: .72rem;
  font-weight: 700;
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease, color 160ms ease;
}

.language-button:hover,
.language-button.is-active {
  border-color: var(--line);
  background: rgba(255,255,255,.045);
  color: var(--text);
}

.language-button span:first-child { font-size: .9rem; line-height: 1; }

.landing {
  position: relative;
  display: grid;
  min-height: 100svh;
  place-items: center;
  isolation: isolate;
}

.landing::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px);
  background-size: 48px 48px;
  content: "";
  mask-image: radial-gradient(circle at center, black, transparent 72%);
}

.intro, .login {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
}

.intro { opacity: 1; transition: opacity 900ms ease, visibility 900ms; }
.intro video {
  display: block;
  width: min(520px, 78vw);
  max-height: 58svh;
  border: 0;
  border-radius: 22px;
  box-shadow: 0 36px 120px rgba(67, 72, 160, 0.24);
  object-fit: contain;
}
.intro.is-finished { visibility: hidden; opacity: 0; }

.login {
  visibility: hidden;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 700ms ease, transform 700ms ease, visibility 700ms;
}
.login.is-visible { visibility: visible; opacity: 1; transform: translateY(0); }
.login-form { width: min(460px, calc(100vw - 40px)); }

.login-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  box-shadow: 0 26px 80px rgba(0,0,0,.46), inset 0 1px 0 rgba(255,255,255,.04);
  backdrop-filter: blur(18px);
}
.login-row:focus-within {
  border-color: rgba(169,184,255,.56);
  box-shadow: 0 26px 80px rgba(0,0,0,.46), 0 0 0 4px rgba(169,184,255,.08);
}
.login-row input {
  min-width: 0;
  border: 0;
  outline: 0;
  padding: 13px 14px;
  background: transparent;
  color: var(--text);
  letter-spacing: .04em;
}
.login-row input::placeholder { color: var(--muted); letter-spacing: 0; }
.login-row button {
  border: 1px solid rgba(213,220,255,.28);
  border-radius: 11px;
  padding: 0 22px;
  background: linear-gradient(145deg, var(--accent-strong), var(--accent));
  color: #080b13;
  font-weight: 760;
  cursor: pointer;
  transition: transform 160ms ease, filter 160ms ease;
}
.login-row button:hover { filter: brightness(1.06); transform: translateY(-1px); }
.login-row button:active { transform: translateY(0); }

.login-note {
  min-height: 1.3em;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: .78rem;
  text-align: center;
  opacity: 0;
  transition: opacity 200ms ease;
}
.login-note.is-visible { opacity: 1; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 560px) {
  .language-switcher { top: 12px; right: 12px; }
  .intro video { width: min(420px, 86vw); border-radius: 18px; }
  .login-row { grid-template-columns: 1fr; }
  .login-row button { min-height: 46px; }
}

@media (prefers-reduced-motion: reduce) {
  .intro { display: none; }
  .login { visibility: visible; opacity: 1; transform: none; transition: none; }
}