@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Playfair+Display:wght@600&display=swap');

:root {
  --auth-ink: #2f2a26;
  --auth-accent: #b87748;
  --auth-bg: #f4eee5;
  --auth-font-accent: "Playfair Display", "Noto Serif TC", serif;
  --switcher-border: rgba(47, 42, 38, 0.14);
}

body.auth-login {
  min-height: 100vh;
  background: radial-gradient(circle at 8% 20%, rgba(217, 121, 65, 0.12), transparent 35%),
    radial-gradient(circle at 80% 0%, rgba(47, 42, 38, 0.12), transparent 40%),
    #fdfaf4;
  font-family: "Inter", "Noto Sans TC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body.auth-login .page-progress {
  display: none !important;
}

.auth-overlay {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(60vw 60vh at 50% 10%, rgba(184, 119, 72, 0.12), transparent 65%),
    rgba(253, 250, 244, 0.85);
  display: grid;
  place-items: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px) scale(0.995);
  transition: opacity 240ms ease, transform 320ms cubic-bezier(0.22, 1, 0.36, 1);
  z-index: 1000;
}

.auth-overlay__inner {
  display: grid;
  place-items: center;
  gap: 12px;
}

.auth-overlay__spinner {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 3px solid rgba(47, 42, 38, 0.2);
  border-top-color: var(--auth-accent);
  animation: auth-spin 0.9s linear infinite;
}

.auth-overlay__label {
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--auth-ink);
}

body.auth-loading .auth-overlay {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.page-transition-veil {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  transform: translateY(12px) scale(1.01);
  transition: opacity 380ms ease, transform 520ms cubic-bezier(0.22, 1, 0.36, 1);
  background:
    radial-gradient(82vw 70vh at 12% 0%, rgba(184, 119, 72, 0.1), transparent 60%),
    radial-gradient(70vw 60vh at 90% 10%, rgba(47, 42, 38, 0.07), transparent 55%),
    rgba(253, 250, 244, 0.7);
  z-index: 980;
  backdrop-filter: blur(8px);
}

.page-transition-veil__beam {
  position: absolute;
  inset-inline: -22%;
  top: 32%;
  height: 22%;
  background: linear-gradient(115deg, rgba(184, 119, 72, 0) 20%, rgba(184, 119, 72, 0.3) 55%, rgba(184, 119, 72, 0) 82%);
  filter: blur(32px);
  opacity: 0;
  transform: translateX(-16%);
}

body.page-transitioning .page-transition-veil {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

body.page-transitioning .page-transition-veil__beam {
  opacity: 0.5;
}

body.locale-transitioning .page-transition-veil__beam,
body.auth-exiting .page-transition-veil__beam {
  animation: veilSweepOnce 0.65s ease forwards;
}

body.auth-login .login-viewport {
  width: 100%;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(32px, 6vw, 64px);
  position: relative;
  overflow: hidden;
}

.auth-switcher {
  position: absolute;
  top: clamp(24px, 4vw, 48px);
  right: clamp(24px, 4vw, 48px);
  z-index: 2;
  display: inline-flex;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.auth-switcher select {
  appearance: none;
  border: 1px solid var(--switcher-border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: rgba(47, 42, 38, 0.8);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.4rem 2rem 0.4rem 0.9rem;
  cursor: pointer;
  min-width: 130px;
  transition: box-shadow 220ms ease, transform 260ms ease, opacity 220ms ease, border-color 200ms ease;
}

.auth-switcher::after {
  content: '\25BE';
  position: absolute;
  top: 50%;
  right: 18px;
  transform: translateY(-50%);
  pointer-events: none;
  font-size: 0.75rem;
  color: rgba(47, 42, 38, 0.6);
}

body.auth-login.animations-armed .login-showcase,
body.auth-login.animations-armed .login-card,
body.auth-login.animations-armed .auth-switcher {
  opacity: 0;
  transform: translateY(14px) scale(0.995);
  transition: opacity 360ms ease, transform 480ms cubic-bezier(0.16, 1, 0.3, 1);
}

body.auth-ready.animations-armed .login-showcase {
  opacity: 1;
  transform: translateY(0) scale(1);
  transition-delay: 70ms;
}

body.auth-ready.animations-armed .login-card {
  opacity: 1;
  transform: translateY(0) scale(1);
  transition-delay: 150ms;
}

body.auth-ready.animations-armed .auth-switcher {
  opacity: 1;
  transform: translateY(0) scale(1);
  transition-delay: 220ms;
}

body.auth-exiting .login-showcase,
body.auth-exiting .login-card,
body.locale-transitioning .login-showcase,
body.locale-transitioning .login-card {
  filter: blur(0.6px);
  transform: translateY(-8px) scale(0.992);
  opacity: 0.85;
}

body.auth-login .login-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 420px);
  gap: clamp(36px, 4.5vw, 56px);
  align-items: stretch;
  max-width: 1024px;
}

body.auth-login .login-showcase {
  border-radius: 28px;
  padding: clamp(32px, 5vw, 60px);
  background: linear-gradient(140deg, rgba(255, 255, 255, 0.9), rgba(246, 236, 223, 0.78));
  border: 1px solid rgba(255, 255, 255, 0.6);
  position: relative;
  overflow: hidden;
  min-height: 420px;
}

body.auth-login .login-showcase::after {
  content: none;
}

body.auth-login .login-showcase__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(47, 42, 38, 0.75);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(47, 42, 38, 0.12);
  margin-bottom: 1.6rem;
}

body.auth-login .login-showcase__title {
  margin: 0;
  font-family: var(--auth-font-accent);
  font-size: clamp(2.45rem, 2.1rem + 1.6vw, 3.1rem);
  line-height: 1.12;
  color: var(--auth-ink);
}

body.auth-login .login-showcase__copy {
  margin: 1.5rem 0 1.9rem;
  font-size: 1.05rem;
  line-height: 1.8;
  color: rgba(47, 42, 38, 0.78);
  max-width: 32ch;
}

body.auth-login .login-showcase__highlights {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

body.auth-login .login-showcase__highlights li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.98rem;
  color: rgba(47, 42, 38, 0.76);
}

body.auth-login .login-showcase__highlights li::before {
  content: "";
  position: absolute;
  inset-inline-start: 0;
  inset-block-start: 0.55rem;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--auth-accent), rgba(217, 121, 65, 0.8));
  box-shadow: 0 0 0 4px rgba(217, 121, 65, 0.14);
}

body.auth-login .login-card {
  margin: 0 auto;
  max-width: 460px;
  padding: clamp(2.4rem, 2.1rem + 1vw, 3rem);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: 0 10px 24px rgba(47, 42, 38, 0.08);
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
  min-height: 420px;
  text-align: left;
  align-items: flex-start;
}

body.auth-login .login-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  color: var(--auth-ink);
  margin-bottom: 0.5rem;
}

body.auth-login .login-logo {
  font-size: 1.4rem;
}

body.auth-login .login-card__title {
  margin: 0;
  font-family: var(--auth-font-accent);
  font-size: 2rem;
  line-height: 1.25;
  color: var(--auth-ink);
}

body.auth-login .login-card__tagline {
  margin: -0.6rem 0 0.5rem;
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(47, 42, 38, 0.76);
}

body.auth-login .login-card__note {
  margin: 0;
  font-size: 0.85rem;
  color: rgba(47, 42, 38, 0.6);
}

body.auth-login .sso-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: auto;
  min-width: 260px;
  border: none;
  text-decoration: none;
  color: #fff;
  background: linear-gradient(135deg, var(--auth-accent) 0%, #c48254 50%, #e2a874 100%);
  background-size: 160% 160%;
  padding: 0.95rem 1.25rem;
  border-radius: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  box-shadow: 0 10px 20px rgba(184, 119, 72, 0.25), inset 0 -2px 0 rgba(46, 34, 28, 0.15);
  transition: transform 180ms ease, box-shadow 180ms ease, background-position 1200ms ease;
  overflow: hidden;
  isolation: isolate;
}

body.auth-login .sso-button::before {
  content: "";
  position: absolute;
  inset: -40%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.5), transparent 55%);
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 240ms ease, transform 420ms ease;
}

body.auth-login .sso-button:hover {
  transform: translateY(-1px);
  background-position: 40% 60%;
  box-shadow: 0 14px 26px rgba(184, 119, 72, 0.3), inset 0 -2px 0 rgba(46, 34, 28, 0.15);
}

body.auth-login .sso-button:active {
  transform: translateY(0);
}

body.auth-login .sso-button:hover::before {
  opacity: 0.24;
  transform: scale(1);
}

body.auth-login .sso-button.is-loading {
  pointer-events: none;
  opacity: 0.92;
  transform: translateY(-2px);
  box-shadow: 0 16px 28px rgba(184, 119, 72, 0.3), inset 0 -2px 0 rgba(46, 34, 28, 0.16);
}

body.auth-login .sso-button.is-loading::before {
  opacity: 0.4;
  animation: shimmer 1.4s ease-in-out infinite;
}

body.auth-login .sso-button.is-loading::after {
  content: "";
  width: 16px;
  height: 16px;
  margin-left: 10px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.55);
  border-top-color: #fff;
  animation: auth-spin 0.8s linear infinite;
}

body.auth-login .login-card form {
  width: 100%;
  display: flex;
}

body.auth-login .sso-button .sso-glow {
  position: absolute;
  inset: -30%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.35), transparent 70%);
  animation: pulse 4s ease-in-out infinite;
  opacity: 0.6;
}

body.auth-login .sso-button.is-loading .sso-glow {
  animation-duration: 2.2s;
}

body.locale-transitioning .login-shell {
  filter: blur(1.1px);
  transform: translateY(-6px) scale(0.995);
  transition: transform 320ms ease, filter 320ms ease;
}

body.locale-transitioning .auth-switcher select {
  border-color: rgba(184, 119, 72, 0.5);
  box-shadow: 0 0 0 8px rgba(184, 119, 72, 0.12);
}

@keyframes pulse {
  0% { transform: scale(0.7); opacity: 0.5; }
  50% { transform: scale(1.05); opacity: 0.9; }
  100% { transform: scale(0.7); opacity: 0.5; }
}

@keyframes auth-spin {
  to { transform: rotate(360deg); }
}

@keyframes shimmer {
  0% { transform: scale(0.9) translateY(2px); opacity: 0.3; }
  50% { transform: scale(1) translateY(0); opacity: 0.6; }
  100% { transform: scale(0.9) translateY(2px); opacity: 0.3; }
}

@keyframes veilSweepOnce {
  0% { transform: translateX(-18%); opacity: 0.1; }
  55% { transform: translateX(4%); opacity: 0.55; }
  100% { transform: translateX(12%); opacity: 0; }
}

@media (max-width: 1024px) {
  body.auth-login .login-shell {
    grid-template-columns: minmax(0, 1fr) minmax(320px, 380px);
  }
}

@media (max-width: 768px) {
  body.auth-login .login-viewport::before,
  body.auth-login .login-viewport::after {
    display: none;
  }
  body.auth-login .login-shell {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  body.auth-login .login-showcase {
    padding: 32px 26px;
    border-radius: 24px;
  }
  body.auth-login .login-card {
    padding: 28px 24px;
    border-radius: 22px;
  }
}