:root {
  --auth-bg: #030303;
  --auth-bg-soft: #111116;
  --auth-surface: rgba(18, 18, 22, 0.48);
  --auth-surface-strong: rgba(255, 255, 255, 0.09);
  --auth-border: rgba(255, 255, 255, 0.14);
  --auth-border-soft: rgba(255, 255, 255, 0.08);
  --auth-text: #ffffff;
  --auth-muted: rgba(255, 255, 255, 0.66);
  --auth-faint: rgba(255, 255, 255, 0.42);
  --auth-accent: #f4f5f7;
  --auth-accent-hover: #dfe3ea;
  --auth-error: #ff7b8b;
  --auth-space-xs: 8px;
  --auth-space-sm: 16px;
  --auth-space-md: 24px;
  --auth-space-lg: 32px;
  --auth-space-xl: 48px;
  --auth-radius-sm: 12px;
  --auth-radius-md: 20px;
  --auth-radius-lg: 28px;
  --auth-blur: 26px;
  --auth-ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --auth-ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

#auth-gate-root {
  position: fixed;
  inset: 0;
  z-index: 999999;
  display: flex;
  overflow: hidden;
  height: 100vh;
  height: 100dvh;
  color: var(--auth-text);
  background:
    radial-gradient(circle at 18% 12%, rgba(92, 99, 130, 0.28), transparent 34%),
    radial-gradient(circle at 84% 74%, rgba(255, 255, 255, 0.12), transparent 32%),
    var(--auth-bg);
  font-family: 'Outfit', system-ui, sans-serif;
  opacity: 1;
  visibility: visible;
  transition: opacity 520ms var(--auth-ease-out), visibility 520ms var(--auth-ease-out);
}

#auth-gate-root.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

#auth-gate-root:not(.hidden) {
  pointer-events: auto;
}

.auth-split-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(360px, 0.94fr);
  width: 100%;
  height: 100%;
  min-height: 0;
}

.auth-illustration-pane,
.auth-form-pane {
  position: relative;
  min-width: 0;
}

.auth-illustration-pane {
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: var(--auth-space-xl);
  background:
    radial-gradient(circle at 34% 24%, rgba(255, 255, 255, 0.12), transparent 0 9%, transparent 22%),
    radial-gradient(circle at 50% 52%, #19191f 0%, #070709 62%, #030303 100%);
}

.auth-stars {
  position: absolute;
  inset: 0;
  opacity: 0.58;
  background-image:
    radial-gradient(1px 1px at 8% 16%, #fff 100%, transparent),
    radial-gradient(1px 1px at 30% 34%, rgba(255, 255, 255, 0.72) 100%, transparent),
    radial-gradient(1.5px 1.5px at 62% 18%, rgba(255, 255, 255, 0.82) 100%, transparent),
    radial-gradient(1px 1px at 74% 70%, rgba(255, 255, 255, 0.62) 100%, transparent),
    radial-gradient(2px 2px at 88% 44%, rgba(255, 255, 255, 0.7) 100%, transparent);
  background-size: 210px 210px;
  animation: authTwinkle 9s linear infinite alternate;
}

.auth-planet {
  position: relative;
  z-index: 2;
  width: clamp(168px, 28vw, 310px);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 28%, rgba(255, 255, 255, 0.24), transparent 0 18%, transparent 34%),
    radial-gradient(circle at 66% 72%, #050505 0%, #15151a 54%, #2a2a31 100%);
  box-shadow:
    0 0 90px rgba(255, 255, 255, 0.08),
    inset -34px -38px 56px rgba(0, 0, 0, 0.78),
    inset 14px 16px 34px rgba(255, 255, 255, 0.07);
  animation: authFloat 7s var(--auth-ease-out) infinite alternate;
}

.auth-planet::after {
  content: '';
  position: absolute;
  top: 47%;
  left: -22%;
  right: -22%;
  height: 19%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  transform: rotate(-15deg);
  box-shadow: 0 0 18px rgba(255, 255, 255, 0.08);
}

.auth-orbit {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  transform: rotate(-20deg);
}

.auth-orbit-one {
  width: min(58vw, 620px);
  height: min(24vw, 250px);
}

.auth-orbit-two {
  width: min(44vw, 470px);
  height: min(18vw, 190px);
  transform: rotate(18deg);
}

.auth-branding {
  position: absolute;
  z-index: 3;
  left: var(--auth-space-xl);
  right: var(--auth-space-xl);
  bottom: var(--auth-space-xl);
  text-align: center;
}

.auth-branding h1 {
  margin: 0 0 var(--auth-space-sm);
  font-size: clamp(2rem, 4.6vw, 4.8rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0;
  background: linear-gradient(135deg, #ffffff 0%, #a6aab4 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.auth-branding p {
  margin: 0;
  color: var(--auth-muted);
  font-size: clamp(0.8rem, 1vw, 1rem);
  font-weight: 500;
  letter-spacing: 0.12em;
}

.auth-form-pane {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--auth-space-md) var(--auth-space-xl);
  pointer-events: auto;
  -webkit-user-select: text;
  user-select: text;
  -webkit-app-region: no-drag;
}

.auth-glass-card {
  width: min(100%, 420px);
  padding: var(--auth-space-lg);
  border: 1px solid var(--auth-border);
  border-radius: var(--auth-radius-lg);
  background: var(--auth-surface);
  -webkit-backdrop-filter: blur(var(--auth-blur)) saturate(142%);
  backdrop-filter: blur(var(--auth-blur)) saturate(142%);
  box-shadow:
    0 24px 60px rgba(0, 0, 0, 0.42),
    inset 0 0 18px rgba(255, 255, 255, 0.055);
  animation: authCardIn 760ms var(--auth-ease-out) both;
  pointer-events: auto;
  -webkit-app-region: no-drag;
}

.auth-header h2 {
  margin: 0 0 var(--auth-space-xs);
  color: var(--auth-text);
  font-size: clamp(1.75rem, 5vw, 2.25rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: 0;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.36);
}

.auth-header p {
  margin: 0 0 var(--auth-space-md);
  color: var(--auth-muted);
  font-size: 0.98rem;
  line-height: 1.55;
}

.auth-form,
.auth-input-group {
  display: flex;
  flex-direction: column;
}

.auth-form {
  gap: var(--auth-space-sm);
}

.auth-input-group {
  gap: 7px;
}

.auth-input-group.hidden {
  display: none;
}

.auth-input-group label {
  color: var(--auth-muted);
  font-size: 0.82rem;
  font-weight: 600;
}

.auth-input-group input {
  width: 100%;
  min-height: 50px;
  padding: 13px 15px;
  border: 1px solid var(--auth-border-soft);
  border-radius: var(--auth-radius-sm);
  outline: none;
  color: var(--auth-text);
  background: rgba(255, 255, 255, 0.06);
  font: inherit;
  transition: border-color 180ms var(--auth-ease-out), background 180ms var(--auth-ease-out), box-shadow 180ms var(--auth-ease-out);
  pointer-events: auto;
  -webkit-user-select: text;
  user-select: text;
  -webkit-app-region: no-drag;
}

.auth-input-group input:focus {
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.09);
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.055);
}

.auth-input-group input::placeholder {
  color: var(--auth-faint);
}

.auth-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 50px;
  gap: 10px;
  border: 0;
  border-radius: var(--auth-radius-sm);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 180ms var(--auth-ease-spring), background 180ms var(--auth-ease-out), border-color 180ms var(--auth-ease-out), opacity 180ms var(--auth-ease-out);
}

.auth-btn:hover {
  transform: translateY(-1px);
}

.auth-btn:active {
  transform: translateY(1px);
}

.auth-btn:disabled {
  cursor: wait;
  opacity: 0.62;
  transform: none;
}

.auth-btn-primary {
  color: #050505;
  background: var(--auth-accent);
  box-shadow: 0 16px 28px rgba(0, 0, 0, 0.24);
}

.auth-btn-primary:hover {
  background: var(--auth-accent-hover);
}

.auth-btn-google {
  margin-top: 0;
  color: var(--auth-text);
  border: 1px solid var(--auth-border-soft);
  background: var(--auth-surface-strong);
}

.auth-btn-google:hover {
  border-color: rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.13);
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: var(--auth-space-sm);
  margin: var(--auth-space-md) 0;
  color: var(--auth-faint);
  font-size: 0.82rem;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--auth-border-soft);
}

.auth-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: var(--auth-space-md);
  color: var(--auth-muted);
  font-size: 0.92rem;
}

.auth-footer button {
  padding: 0;
  border: 0;
  color: var(--auth-text);
  background: transparent;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.auth-footer button:hover {
  text-decoration: underline;
}

.auth-error {
  min-height: 20px;
  color: var(--auth-error);
  font-size: 0.85rem;
  line-height: 1.35;
  text-align: center;
}

.auth-loading-overlay {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--auth-space-sm);
  background: rgba(3, 3, 3, 0.94);
  color: var(--auth-muted);
  transition: opacity 360ms var(--auth-ease-out), visibility 360ms var(--auth-ease-out);
}

.auth-loading-overlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.auth-spinner {
  width: 42px;
  aspect-ratio: 1;
  border: 3px solid rgba(255, 255, 255, 0.12);
  border-top-color: var(--auth-accent);
  border-radius: 50%;
  animation: authSpin 900ms linear infinite;
}

@keyframes authCardIn {
  from {
    opacity: 0;
    transform: translateY(22px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes authFloat {
  from {
    transform: translate3d(0, 0, 0);
  }
  to {
    transform: translate3d(0, -14px, 0);
  }
}

@keyframes authSpin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes authTwinkle {
  from {
    opacity: 0.35;
  }
  to {
    opacity: 0.72;
  }
}

@media (max-width: 820px) {
  .auth-split-layout {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(176px, 29dvh) minmax(0, 1fr);
  }

  .auth-illustration-pane {
    padding: max(12px, env(safe-area-inset-top)) var(--auth-space-md) 8px;
  }

  .auth-planet {
    width: clamp(118px, 33vw, 158px);
  }

  .auth-orbit-one {
    width: 86vw;
    height: 30vw;
  }

  .auth-orbit-two {
    width: 64vw;
    height: 22vw;
  }

  .auth-branding {
    top: 50%;
    bottom: auto;
    left: var(--auth-space-sm);
    right: var(--auth-space-sm);
    transform: translateY(-2%);
    text-shadow: 0 5px 22px rgba(0, 0, 0, 0.72);
  }

  .auth-branding h1 {
    margin-bottom: 8px;
    font-size: clamp(2.25rem, 12vw, 3.5rem);
    line-height: 0.92;
  }

  .auth-branding p {
    max-width: 82vw;
    margin: 0 auto;
    font-size: clamp(0.64rem, 3vw, 0.82rem);
    line-height: 1.2;
    letter-spacing: 0.1em;
  }

  .auth-form-pane {
    align-items: flex-start;
    min-height: 0;
    padding: 10px var(--auth-space-md) max(10px, env(safe-area-inset-bottom));
  }

  .auth-glass-card {
    width: 100%;
    padding: 18px 20px;
    border-radius: 22px;
  }

  .auth-header h2 {
    font-size: clamp(1.65rem, 7vw, 2.05rem);
  }

  .auth-header p {
    margin-bottom: 14px;
    font-size: 0.9rem;
    line-height: 1.42;
  }

  .auth-form {
    gap: 10px;
  }

  .auth-input-group {
    gap: 5px;
  }

  .auth-input-group label {
    font-size: 0.76rem;
  }

  .auth-input-group input,
  .auth-btn {
    min-height: 44px;
  }

  .auth-input-group input {
    padding: 10px 14px;
  }

  .auth-divider {
    gap: 10px;
    margin: 12px 0;
  }

  .auth-footer {
    margin-top: 12px;
    font-size: 0.86rem;
  }
}

@media (max-height: 720px) and (max-width: 820px) {
  .auth-split-layout {
    grid-template-rows: minmax(140px, 24dvh) minmax(0, 1fr);
  }

  .auth-planet {
    width: clamp(96px, 28vw, 130px);
  }

  .auth-branding h1 {
    font-size: clamp(1.7rem, 10vw, 2.45rem);
  }

  .auth-branding p {
    font-size: 0.58rem;
  }

  .auth-glass-card {
    padding: 14px 18px;
  }

  .auth-header p {
    margin-bottom: 10px;
  }

  .auth-input-group input,
  .auth-btn {
    min-height: 40px;
  }

  .auth-divider {
    margin: 9px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  #auth-gate-root,
  .auth-glass-card,
  .auth-planet,
  .auth-stars,
  .auth-btn,
  .auth-loading-overlay {
    animation: none;
    transition: none;
  }
}