:root {
  color-scheme: dark;
  font-family: "Microsoft YaHei UI", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  min-width: 320px;
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
}

.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;
}

.video-stage {
  position: absolute;
  inset: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 68% 38%, rgba(66, 83, 102, 0.34), transparent 32%),
    linear-gradient(135deg, #11161c, #050607 64%);
}

.video-stage video {
  position: absolute;
  inset: -2%;
  width: 104%;
  height: 104%;
  object-fit: cover;
  opacity: 0;
  transform: scale(1.015);
  transition: opacity 1.1s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity;
}

.video-stage video.is-active {
  opacity: 1;
}

.video-stage.is-fallback video {
  display: none;
}

.video-stage.is-user-paused::after {
  content: "PAUSED";
  position: absolute;
  right: 22px;
  bottom: 22px;
  padding: 6px 8px;
  color: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(255, 255, 255, 0.22);
  font: 600 10px/1 "Bahnschrift", "Arial Narrow", sans-serif;
  letter-spacing: 0.16em;
}

.prototype-switcher {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px;
  border: 1px solid currentColor;
}

.prototype-switcher a {
  min-width: 30px;
  min-height: 30px;
  display: grid;
  place-items: center;
  color: inherit;
  text-decoration: none;
  font: 700 11px/1 "Bahnschrift", sans-serif;
}

.prototype-switcher a[aria-current="page"] {
  color: var(--switch-active-text, #090a0c);
  background: var(--switch-active, #f1eee7);
}

.prototype-switcher a:focus-visible,
.video-toggle:focus-visible,
.password-toggle:focus-visible,
.submit-button:focus-visible,
.text-link:focus-visible {
  outline: 2px solid var(--focus-color, #f06a3c);
  outline-offset: 3px;
}

.video-toggle {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 0 13px;
  color: inherit;
  border: 1px solid currentColor;
  background: transparent;
  cursor: pointer;
}

.video-toggle::before {
  content: "";
  width: 7px;
  height: 7px;
  background: currentColor;
}

.video-toggle[aria-pressed="true"]::before {
  background: transparent;
  border: 1px solid currentColor;
}

.login-form {
  width: 100%;
  max-width: 420px;
  display: grid;
  gap: 18px;
}

.field {
  display: grid;
  gap: 8px;
}

.field-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.field-control {
  position: relative;
}

.field input {
  width: 100%;
  height: 54px;
  padding: 0 52px 0 15px;
  color: inherit;
  border: 1px solid var(--input-border, rgba(255, 255, 255, 0.2));
  border-radius: 0;
  outline: none;
  background: var(--input-bg, rgba(255, 255, 255, 0.06));
  transition: border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease;
}

.field input::placeholder {
  color: var(--placeholder, rgba(255, 255, 255, 0.42));
}

.field input:focus {
  border-color: var(--focus-color, #f06a3c);
  box-shadow: 0 0 0 1px var(--focus-color, #f06a3c);
}

.password-toggle {
  position: absolute;
  top: 50%;
  right: 9px;
  min-width: 40px;
  min-height: 36px;
  padding: 0 7px;
  color: inherit;
  border: 0;
  background: transparent;
  transform: translateY(-50%);
  cursor: pointer;
  font-size: 12px;
}

.submit-button {
  min-height: 56px;
  margin-top: 4px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 0;
  cursor: pointer;
  font-weight: 800;
  letter-spacing: 0.06em;
  transition: transform 140ms ease, filter 140ms ease, background-color 140ms ease;
}

.submit-button:hover {
  filter: brightness(1.07);
}

.submit-button:active,
.submit-button.is-confirmed {
  transform: translateY(2px);
}

.form-status {
  min-height: 20px;
  margin: -4px 0 0;
  font-size: 12px;
  line-height: 1.55;
  opacity: 0;
  transform: translateY(-3px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.form-status.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.form-meta {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  font-size: 12px;
  line-height: 1.5;
}

.text-link {
  text-underline-offset: 4px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .video-stage video {
    transform: none;
  }
}