:root {
  color-scheme: dark light;

  --bg-0: #050507;
  --text-0: rgba(255, 255, 255, 0.96);
  --text-1: rgba(255, 255, 255, 0.64);
  --stroke-0: rgba(255, 255, 255, 0.08);
  --stroke-1: rgba(255, 255, 255, 0.14);

  --glass: rgba(10, 12, 20, 0.58);
  --glass-2: rgba(10, 12, 20, 0.32);

  --cyan: #33e1ed;
  --purple: #7c5cff;
  --magenta: #ff4dab;
  --danger: #ff5c7a;
  --success: #34d399;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family:
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "PingFang SC",
    "Hiragino Sans GB",
    "Noto Sans SC",
    "Microsoft YaHei UI",
    Arial,
    sans-serif;
  color: var(--text-0);
  background: var(--bg-0);
  overflow-x: hidden;
}

.auth-stage {
  position: relative;
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 36px 18px;
}

.auth-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(1200px 800px at 15% 18%, rgba(124, 92, 255, 0.35), transparent 60%),
    radial-gradient(1100px 700px at 88% 22%, rgba(51, 225, 237, 0.26), transparent 58%),
    radial-gradient(900px 680px at 72% 82%, rgba(255, 77, 171, 0.22), transparent 62%),
    radial-gradient(880px 520px at 20% 82%, rgba(10, 196, 255, 0.10), transparent 66%),
    linear-gradient(180deg, rgba(5, 5, 7, 1), rgba(5, 5, 7, 1));
  filter: saturate(1.2);
}

.auth-bg::after {
  content: "";
  position: absolute;
  inset: -2px;
  background:
    radial-gradient(1200px 600px at 50% 0%, rgba(255, 255, 255, 0.06), transparent 60%),
    radial-gradient(900px 450px at 70% 15%, rgba(255, 255, 255, 0.04), transparent 60%);
  opacity: 0.9;
  pointer-events: none;
  mix-blend-mode: screen;
}

.auth-card {
  position: relative;
  width: min(520px, 100%);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  padding: 1px;
  box-shadow: 0 40px 140px rgba(0, 0, 0, 0.55);
}

.auth-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 28px;
  padding: 1px;
  background: linear-gradient(90deg, rgba(51, 225, 237, 0.55), rgba(124, 92, 255, 0.45), rgba(255, 77, 171, 0.40));
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0.45;
}

.auth-card-inner {
  border-radius: 27px;
  background: var(--glass);
  backdrop-filter: blur(26px);
  -webkit-backdrop-filter: blur(26px);
  padding: 34px 34px 30px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.auth-topbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 18px;
}

.auth-brand-frame {
  position: relative;
  display: inline-flex;
  padding: 1px;
  border-radius: 9999px;
  background: linear-gradient(90deg, rgba(51, 225, 237, 0.65), rgba(124, 92, 255, 0.55), rgba(255, 77, 171, 0.55));
  background-size: 220% 220%;
  box-shadow: 0 18px 55px rgba(0, 0, 0, 0.42), 0 0 0 1px rgba(255, 255, 255, 0.06);
  animation: auth-brand-shift 10s ease-in-out infinite;
}

.auth-brand-frame::after {
  content: "";
  position: absolute;
  inset: -10px;
  border-radius: inherit;
  background: linear-gradient(90deg, rgba(51, 225, 237, 0.55), rgba(124, 92, 255, 0.45), rgba(255, 77, 171, 0.55));
  filter: blur(18px);
  opacity: 0.28;
  pointer-events: none;
  mix-blend-mode: screen;
}

@keyframes auth-brand-shift {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

.auth-brand {
  display: inline-flex;
  align-items: center;
  padding: 10px 16px;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.auth-logo {
  height: 52px;
  width: auto;
  filter: drop-shadow(0 8px 22px rgba(0, 0, 0, 0.45));
}

.auth-lang {
  position: absolute;
  top: 18px;
  right: 18px;
  z-index: 20;
  display: inline-block;
}

.auth-lang:hover .auth-lang-trigger {
  border-color: rgba(51, 225, 237, 0.42);
  box-shadow: 0 0 0 1px rgba(51, 225, 237, 0.10), 0 18px 40px rgba(0, 0, 0, 0.35);
  transform: translateY(-1px);
}

.auth-lang-trigger {
  width: 172px;
  height: 48px;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background:
    radial-gradient(380px 200px at 20% 0%, rgba(124, 92, 255, 0.16), transparent 60%),
    radial-gradient(380px 200px at 82% 0%, rgba(51, 225, 237, 0.12), transparent 60%),
    rgba(10, 11, 15, 0.52);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.10), 0 18px 55px rgba(0, 0, 0, 0.38);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 14px 0 10px;
  color: rgba(255, 255, 255, 0.92);
  cursor: pointer;
  transition: 180ms ease;
}

.auth-lang-trigger:active {
  transform: translateY(0px) scale(0.99);
}

.auth-lang-flag {
  width: 34px;
  height: 34px;
  border-radius: 9999px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
  display: grid;
  place-items: center;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.40);
  flex: 0 0 auto;
}

.auth-lang-current {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  flex: 1 1 auto;
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.auth-lang-caret {
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.62);
  transition: 180ms ease;
}

.auth-lang.is-open .auth-lang-caret {
  transform: rotate(180deg);
  color: rgba(255, 255, 255, 0.92);
}

.auth-lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  width: 228px;
  padding: 10px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background:
    radial-gradient(520px 260px at 20% 0%, rgba(124, 92, 255, 0.18), transparent 62%),
    radial-gradient(520px 260px at 82% 0%, rgba(51, 225, 237, 0.14), transparent 62%),
    rgba(10, 11, 15, 0.78);
  backdrop-filter: blur(26px);
  -webkit-backdrop-filter: blur(26px);
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.60), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  opacity: 0;
  transform: translateY(-10px);
  pointer-events: none;
  cursor: pointer;
  transition: 180ms ease;
}

.auth-lang.is-open .auth-lang-menu {
  opacity: 1;
  transform: translateY(0px);
  pointer-events: auto;
}

.auth-lang-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 12px;
  border-radius: 18px;
  border: 1px solid transparent;
  background: transparent;
  color: rgba(255, 255, 255, 0.92);
  cursor: pointer;
  text-align: left;
  transition: 160ms ease;
}

.auth-lang-item:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.12);
}

.auth-lang-item[aria-checked="true"] {
  background: rgba(255, 255, 255, 0.10);
  border-color: rgba(51, 225, 237, 0.28);
  box-shadow: 0 0 0 3px rgba(51, 225, 237, 0.08);
}

.auth-lang-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1.1;
}

.auth-lang-code {
  font-size: 12px;
  letter-spacing: 0.24em;
  color: rgba(255, 255, 255, 0.55);
}

.auth-lang-name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.auth-flag {
  width: 44px;
  height: 32px;
  object-fit: cover;
  border-radius: 0;
  display: block;
}

.auth-title {
  margin: 6px 0 0;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-align: center;
  text-shadow: 0 18px 60px rgba(0, 0, 0, 0.55), 0 0 24px rgba(224, 242, 254, 0.12);
}

.auth-subtitle {
  margin: 10px 0 28px;
  text-align: center;
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.44);
}

.auth-accent {
  width: 34px;
  height: 2px;
  margin: -14px auto 22px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(51, 225, 237, 0.95), rgba(124, 92, 255, 0.85), rgba(255, 77, 171, 0.85));
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.06), 0 18px 40px rgba(0, 0, 0, 0.35);
  opacity: 0.9;
}

.auth-form {
  display: grid;
  gap: 16px;
}

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

.field-label {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.62);
  text-transform: uppercase;
}

.field-label b {
  font-weight: 700;
  color: rgba(255, 255, 255, 0.9);
}

.input {
  width: 100%;
  height: 46px;
  padding: 0 14px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.10);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-0);
  outline: none;
  transition: 160ms ease;
}

.input::placeholder {
  color: rgba(255, 255, 255, 0.34);
}

.input:focus {
  border-color: rgba(51, 225, 237, 0.45);
  box-shadow: 0 0 0 4px rgba(51, 225, 237, 0.12);
}

.row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 520px) {
  .row.two {
    grid-template-columns: 1fr 1fr;
  }
}

.actions {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-top: 2px;
}

.checkbox {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.62);
  user-select: none;
}

.checkbox input {
  width: 16px;
  height: 16px;
  accent-color: var(--cyan);
}

.link {
  color: rgba(124, 92, 255, 0.95);
  text-decoration: none;
  font-size: 13px;
}

.link:hover {
  text-decoration: underline;
}

.btn {
  width: 100%;
  height: 52px;
  border-radius: 16px;
  border: none;
  cursor: pointer;
  color: rgba(255, 255, 255, 0.98);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.12em;
  background: linear-gradient(90deg, rgba(124, 92, 255, 0.95), rgba(51, 225, 237, 0.95), rgba(255, 77, 171, 0.95));
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.35);
  transition: 160ms ease;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.12), transparent);
  transform: translateX(-120%);
  transition: transform 520ms ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 28px 76px rgba(0, 0, 0, 0.42);
}

.btn:hover::after {
  transform: translateX(120%);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.error {
  margin-top: 14px;
  color: rgba(255, 92, 122, 0.94);
  font-size: 13px;
  line-height: 1.7;
  min-height: 22px;
}

.footer {
  margin-top: 16px;
  text-align: center;
  color: rgba(255, 255, 255, 0.48);
  font-size: 13px;
}

.footer a {
  margin-left: 8px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

@media (max-width: 420px) {
  .auth-card-inner {
    padding: 28px 20px 24px;
  }
}