:root {
  --navy950: #04152a;
  --navy900: #081f3a;
  --navy800: #0b2a4a;
  --blue600: #145ce6;
  --blue500: #3d8bff;
  --blue400: #61a8ff;
  --text-primary: #f5f8fc;
  --text-secondary: #a9b8ca;
  --auth-border: rgba(129, 177, 228, 0.3);
  --danger: #ef4444;
  --danger-text: #ff9b9b;
  --success: #22c55e;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --radius-2: 8px;
  --radius-3: 12px;
  --radius-4: 16px;
  --radius-5: 20px;
  --radius-6: 24px;
  --card: rgba(5, 25, 50, 0.82);
  --card-mobile: rgba(5, 25, 50, 0.94);
  --control: rgba(3, 19, 38, 0.74);
  --focus-ring: rgba(97, 168, 255, 0.34);
  --shadow-card: 0 32px 80px rgba(0, 7, 20, 0.46);
  --font-auth: "KoPub Dotum", sans-serif;
}

.login-page {
  min-width: 320px;
  min-height: 100svh;
  padding: 0;
  overflow-x: hidden;
  color: var(--text-primary);
  font-family: var(--font-auth);
  background: var(--navy950);
}

.login-page .main {
  min-height: 100svh;
  padding: 0;
}

.login-page .skip-link {
  z-index: 100;
}

.login-experience,
.login-backdrop {
  position: absolute;
  inset: 0;
  min-height: 100svh;
}

.login-experience {
  isolation: isolate;
  overflow: hidden;
  background: var(--navy950);
}

.login-backdrop {
  z-index: -2;
  background-color: var(--navy950);
  background-image: url("/app/static/assets/images/login-background-clean.png");
  background-image: image-set(
    url("/app/static/assets/images/login-background-clean.webp") type("image/webp") 1x,
    url("/app/static/assets/images/login-background-clean.png") type("image/png") 1x
  );
  background-position: 46% center;
  background-size: cover;
}

.login-backdrop::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(4, 21, 42, 0.52) 0%, rgba(4, 21, 42, 0.24) 44%, rgba(4, 21, 42, 0.72) 69%, rgba(4, 21, 42, 0.96) 100%),
    linear-gradient(0deg, rgba(4, 21, 42, 0.88) 0%, rgba(4, 21, 42, 0.08) 52%, rgba(4, 21, 42, 0.46) 100%);
}

.login-layout {
  box-sizing: border-box;
  width: min(100%, 1680px);
  min-height: 100svh;
  margin: 0 auto;
  padding: clamp(var(--space-8), 5vw, 80px);
  display: grid;
  grid-template-columns: minmax(0, 1.42fr) minmax(420px, 1fr);
  gap: clamp(var(--space-10), 4.5vw, 80px);
  align-items: center;
}

.auth-visual {
  min-width: 0;
  min-height: min(780px, calc(100svh - 128px));
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding-block: var(--space-2);
}

.auth-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  width: fit-content;
}

.auth-brand__mark {
  width: 46px;
  height: 46px;
  flex: 0 0 auto;
  stroke: var(--blue400);
  stroke-width: 1.75;
  filter: drop-shadow(0 0 14px rgba(61, 139, 255, 0.24));
}

.auth-brand__copy {
  display: grid;
  gap: 2px;
}

.auth-brand__copy strong {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.auth-brand__copy span {
  color: var(--text-secondary);
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.auth-visual__content {
  margin-block: auto;
  width: min(100%, 780px);
  padding: var(--space-10) var(--space-12) var(--space-10) 0;
  border-radius: var(--radius-6);
  background: linear-gradient(90deg, rgba(4, 21, 42, 0.74) 0%, rgba(4, 21, 42, 0.38) 62%, transparent 100%);
}

.auth-kicker,
.login-card__eyebrow {
  margin: 0 0 var(--space-4);
  color: var(--blue400);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
}

.auth-visual h1 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(2.75rem, 4.3vw, 5rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.045em;
  text-shadow: 0 4px 28px rgba(0, 9, 22, 0.58);
}

.auth-hero-line {
  display: block;
  white-space: nowrap;
}

.auth-description {
  max-width: 680px;
  margin: var(--space-6) 0 0;
  color: var(--text-secondary);
  font-size: clamp(1rem, 1.25vw, 1.16rem);
  line-height: 1.8;
  text-shadow: 0 2px 12px var(--navy950);
}

.auth-features {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-3);
  margin: 0 0 var(--space-6);
  padding: 0;
  list-style: none;
}

.auth-feature {
  min-width: 0;
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 1px solid var(--auth-border);
  border-radius: var(--radius-3);
  background: rgba(4, 21, 42, 0.62);
  backdrop-filter: blur(10px);
}

.auth-feature__number {
  color: var(--blue400);
  font-size: 0.7rem;
  font-weight: 600;
}

.auth-feature strong,
.auth-feature span span {
  display: block;
}

.auth-feature strong {
  margin-bottom: var(--space-1);
  font-size: 0.86rem;
  font-weight: 600;
}

.auth-feature span span {
  color: var(--text-secondary);
  font-size: 0.72rem;
  line-height: 1.45;
}

.platform-assurance {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.76rem;
}

.auth-card-column {
  width: 100%;
  max-width: 520px;
  min-width: 0;
  justify-self: center;
}

.login-card {
  box-sizing: border-box;
  min-width: 0;
  max-width: 100%;
  padding: clamp(var(--space-8), 3.2vw, var(--space-12));
  border: 1px solid var(--auth-border);
  border-radius: var(--radius-5);
  background: var(--card);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(18px);
}

.login-card__mobile-brand {
  display: none;
}

.login-card__header h2 {
  margin: 0;
  font-size: clamp(2rem, 3vw, 2.65rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.035em;
}

.login-card__header > p:last-child {
  margin: var(--space-3) 0 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.auth-message {
  min-height: 44px;
  margin: var(--space-5) 0 0;
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  border: 1px solid rgba(239, 68, 68, 0.48);
  border-radius: var(--radius-2);
  color: var(--text-primary);
  background: rgba(127, 29, 29, 0.24);
  font-size: 0.84rem;
  line-height: 1.45;
}

.auth-message svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  stroke: var(--danger);
  stroke-width: 1.8;
}

.auth-message--empty {
  display: none;
}

.auth-form {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-6);
  min-width: 0;
  max-width: 100%;
}

.auth-field {
  display: grid;
  gap: var(--space-2);
  min-width: 0;
  max-width: 100%;
}

.auth-field label {
  color: var(--text-primary);
  font-size: 0.86rem;
  font-weight: 600;
}

.auth-control {
  position: relative;
  min-width: 0;
  max-width: 100%;
  width: 100%;
}

.auth-control input {
  box-sizing: border-box;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  height: 56px;
  padding: 0 var(--space-12);
  border: 1px solid var(--auth-border);
  border-radius: var(--radius-3);
  outline: none;
  color: var(--text-primary);
  background: var(--control);
  font: inherit;
  font-size: 0.95rem;
  transition: border-color 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

.auth-control input::placeholder {
  color: var(--text-secondary);
  opacity: 0.66;
}

.auth-control input:hover {
  border-color: rgba(129, 177, 228, 0.52);
}

.auth-control input:focus-visible {
  border-color: var(--blue400);
  background: rgba(3, 19, 38, 0.9);
  box-shadow: 0 0 0 var(--space-1) var(--focus-ring);
}

.auth-field[data-invalid="true"] .auth-control input {
  border-color: var(--danger);
}

.auth-control__icon {
  position: absolute;
  z-index: 1;
  left: var(--space-4);
  top: 50%;
  width: var(--space-5);
  height: var(--space-5);
  translate: 0 -50%;
  stroke: var(--text-secondary);
  stroke-width: 1.7;
  pointer-events: none;
}

.password-toggle {
  position: absolute;
  top: 50%;
  right: var(--space-2);
  width: var(--space-10);
  height: var(--space-10);
  padding: 10px;
  translate: 0 -50%;
  border: 0;
  border-radius: var(--radius-2);
  color: var(--text-secondary);
  background: transparent;
  cursor: pointer;
}

.password-toggle:hover {
  color: var(--text-primary);
  background: rgba(129, 177, 228, 0.1);
}

.password-toggle:focus-visible,
.login-submit:focus-visible {
  outline: 3px solid var(--blue400);
  outline-offset: 3px;
}

.password-toggle svg {
  width: var(--space-5);
  height: var(--space-5);
  stroke: currentColor;
  stroke-width: 1.7;
}

.password-toggle__hide,
.password-toggle[aria-pressed="true"] .password-toggle__show {
  display: none;
}

.password-toggle[aria-pressed="true"] .password-toggle__hide {
  display: block;
}

.auth-field__error {
  min-height: 1.15em;
  margin: 0;
  color: var(--danger-text);
  font-size: 0.76rem;
  line-height: 1.4;
}

.auth-remember {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 0.86rem;
}

.auth-remember input {
  width: 18px;
  height: 18px;
  accent-color: var(--blue400);
  flex: 0 0 auto;
}

.auth-remember input:focus-visible {
  outline: 2px solid var(--blue400);
  outline-offset: 3px;
}

.auth-remember-hint {
  margin: -8px 0 0;
  color: var(--text-secondary);
  font-size: 0.75rem;
  line-height: 1.5;
}

.login-submit {
  box-sizing: border-box;
  width: 100%;
  max-width: 100%;
  height: 56px;
  margin-top: var(--space-1);
  border: 1px solid transparent;
  border-radius: var(--radius-3);
  color: var(--text-primary);
  background: var(--blue600);
  box-shadow: 0 10px 28px rgba(20, 92, 230, 0.28);
  font: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 160ms ease, translate 160ms ease, box-shadow 160ms ease;
}

.login-submit:hover:not(:disabled) {
  background: var(--blue500);
  box-shadow: 0 12px 34px rgba(20, 92, 230, 0.38);
  translate: 0 -1px;
}

.login-submit:active:not(:disabled) {
  background: var(--blue600);
  translate: 0 1px;
  box-shadow: 0 6px 16px rgba(20, 92, 230, 0.24);
}

.login-submit:disabled {
  opacity: 0.72;
  cursor: wait;
}

.login-submit__loading,
.login-submit[data-loading="true"] .login-submit__default {
  display: none;
}

.login-submit[data-loading="true"] .login-submit__loading {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.login-spinner {
  width: var(--space-4);
  height: var(--space-4);
  border: 2px solid rgba(245, 248, 252, 0.35);
  border-top-color: var(--text-primary);
  border-radius: 50%;
  animation: login-spin 700ms linear infinite;
}

.login-status {
  min-height: 1em;
  margin: calc(var(--space-2) * -1) 0 0;
  color: var(--text-secondary);
  font-size: 0.76rem;
  text-align: center;
}

.login-page .app-version {
  right: var(--space-5);
  bottom: var(--space-4);
  z-index: 10;
  color: var(--text-secondary);
}

@keyframes login-spin {
  to { rotate: 360deg; }
}

@media (max-width: 1439px) {
  .login-backdrop {
    background-position: 40% center;
  }

  .login-layout {
    grid-template-columns: minmax(280px, 0.94fr) minmax(390px, 1fr);
    gap: clamp(var(--space-8), 4vw, var(--space-16));
    padding: clamp(var(--space-8), 5vw, var(--space-16));
  }

  .auth-visual {
    min-height: min(680px, calc(100svh - 96px));
  }

  .auth-visual h1 {
    font-size: clamp(2.35rem, 4.35vw, 3.8rem);
  }

  .auth-features {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .auth-feature:nth-child(n + 3) {
    display: none;
  }
}

@media (max-width: 900px) {
  .login-layout {
    grid-template-columns: minmax(230px, 0.75fr) minmax(390px, 1fr);
    padding-inline: var(--space-8);
  }

  .auth-visual__content {
    padding: var(--space-8) var(--space-5) var(--space-8) 0;
  }

  .auth-visual h1 {
    font-size: clamp(1.65rem, 3.6vw, 2rem);
    letter-spacing: -0.055em;
  }

  .auth-description .desktop-break {
    display: none;
  }

  .auth-features {
    grid-template-columns: 1fr;
  }

  .auth-feature:nth-child(2) {
    display: none;
  }
}

@media (max-width: 767px) {
  .login-experience {
    position: relative;
    display: grid;
    align-items: center;
    min-height: 100svh;
    overflow: visible;
  }

  .login-backdrop::after {
    background: linear-gradient(0deg, rgba(4, 21, 42, 0.97), rgba(4, 21, 42, 0.84));
  }

  .login-backdrop {
    background-position: 34% center;
  }

  .login-layout {
    min-height: auto;
    display: block;
    padding: clamp(var(--space-8), 7vh, var(--space-12)) var(--space-5) var(--space-16);
  }

  .auth-visual {
    display: none;
  }

  .auth-card-column {
    max-width: none;
  }

  .login-card {
    padding: clamp(var(--space-6), 8vw, var(--space-8));
    border-radius: var(--radius-5);
    background: var(--card-mobile);
    backdrop-filter: blur(14px);
  }

  .login-card__mobile-brand {
    display: block;
    margin-bottom: var(--space-8);
  }

  .auth-brand--compact .auth-brand__mark {
    width: var(--space-10);
    height: var(--space-10);
  }

  .auth-brand--compact .auth-brand__copy span {
    max-width: 240px;
    white-space: nowrap;
  }

  .login-card__header h2 {
    font-size: 2rem;
  }

  .login-card__header > p:last-child {
    font-size: 0.86rem;
  }

  .login-page .app-version {
    right: var(--space-5);
    bottom: var(--space-3);
  }
}

@media (max-width: 380px) {
  .login-layout {
    padding-inline: var(--space-4);
  }

  .login-card {
    padding-inline: var(--space-5);
  }

  .auth-brand--compact .auth-brand__copy span {
    max-width: 205px;
    font-size: 0.68rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (prefers-contrast: more) {
  .login-card,
  .auth-control input,
  .auth-feature {
    border-color: var(--text-primary);
  }
}