:root {
  --navy-950: #05132b;
  --navy-900: #0a1f42;
  --navy-800: #0f2d5e;
  --navy-700: #14407f;
  --blue-600: #1d4ed8;
  --blue-500: #2563eb;
  --blue-400: #3b82f6;
  --sky-400: #38bdf8;
  --sky-500: #0ea5e9;
  --ink-900: #0b1524;
  --ink-700: #29384f;
  --ink-500: #5b6b83;
  --ink-300: #93a3b8;
  --line: #e2e8f0;
  --surface: #f5f8fc;
  --shadow-lg: 0 30px 70px rgba(5, 19, 43, 0.35);
  --shadow-sm: 0 6px 16px rgba(13, 45, 94, 0.12);
  --radius-lg: 24px;
  --radius-md: 14px;
}

* {
  box-sizing: border-box;
}

body.auth-body {
  margin: 0;
  min-height: 100vh;
  font-family: "Montserrat", "Segoe UI", sans-serif;
  color: var(--ink-900);
  background-color: var(--navy-950);
  background-image:
    radial-gradient(circle at 12% 18%, rgba(56, 189, 248, 0.22), transparent 42%),
    radial-gradient(circle at 88% 82%, rgba(37, 99, 235, 0.28), transparent 46%),
    linear-gradient(160deg, #05132b 0%, #0a1f42 45%, #14407f 100%);
}

.auth-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 20px;
  position: relative;
  overflow: hidden;
}

/* Reticula sutil de fondo */
.auth-shell::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(circle at 50% 50%, #000 20%, transparent 72%);
  mask-image: radial-gradient(circle at 50% 50%, #000 20%, transparent 72%);
  pointer-events: none;
}

.auth-shell::after {
  content: "";
  position: absolute;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.18), transparent 70%);
  right: -200px;
  bottom: -240px;
  pointer-events: none;
}

.auth-card {
  position: relative;
  width: min(1020px, 96vw);
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  overflow: hidden;
  z-index: 1;
}

/* Filo superior de acento */
.auth-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--sky-400), var(--blue-500), var(--navy-700));
  z-index: 3;
}

/* Panel izquierdo */
.auth-card__left {
  padding: 52px 48px;
  color: #fff;
  background: linear-gradient(155deg, var(--navy-950) 0%, var(--navy-800) 55%, var(--navy-700) 100%);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 22px;
  overflow: hidden;
}

/* Anillos concentricos decorativos */
.auth-card__left::before {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  right: -160px;
  top: -140px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow:
    0 0 0 40px rgba(255, 255, 255, 0.04),
    0 0 0 90px rgba(255, 255, 255, 0.03);
}

/* Halo cian */
.auth-card__left::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 85% 15%, rgba(56, 189, 248, 0.3), transparent 50%);
  pointer-events: none;
}

.auth-card__left > * {
  position: relative;
  z-index: 1;
}

.auth-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  text-decoration: none;
}

.auth-brand__logo {
  width: 58px;
  height: 58px;
  border-radius: 16px;
  background: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 7px;
  box-shadow: var(--shadow-sm);
}

.auth-brand__logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.auth-brand__title {
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 1.02rem;
  display: block;
}

.auth-brand__sub {
  font-size: 0.82rem;
  color: var(--sky-400);
  letter-spacing: 0.02em;
  display: block;
}

.auth-hero__title {
  font-family: "Playfair Display", "Georgia", serif;
  font-size: clamp(2rem, 3vw + 1rem, 2.9rem);
  margin: 0;
  line-height: 1.12;
}

.auth-hero__lead {
  margin: 0;
  color: rgba(226, 240, 255, 0.82);
  line-height: 1.65;
  max-width: 440px;
  font-size: 0.96rem;
}

.auth-hero__pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.45);
  color: var(--sky-400);
  font-weight: 600;
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 0.86rem;
  letter-spacing: 0.02em;
  width: fit-content;
}

.auth-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: auto;
}

.auth-hero__stats > div {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-left: 3px solid var(--sky-400);
  padding: 14px 16px;
  border-radius: 12px;
}

.auth-stat__num {
  font-size: 1.45rem;
  font-weight: 800;
  display: block;
  color: #fff;
}

.auth-stat__label {
  font-size: 0.8rem;
  color: rgba(226, 240, 255, 0.7);
}

/* Panel derecho (formulario) */
.auth-card__right {
  padding: 52px 48px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  background: #fff;
}

.auth-card__header h2 {
  margin: 0 0 6px;
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--navy-900);
  letter-spacing: -0.01em;
}

.auth-card__header p {
  margin: 0;
  color: var(--ink-500);
  font-size: 0.92rem;
}

.auth-alert,
.auth-session-status {
  background: #e0f2fe;
  border-left: 3px solid var(--sky-500);
  color: #075985;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
}

.auth-form {
  display: grid;
  gap: 6px;
}

.auth-form label {
  font-weight: 600;
  color: var(--ink-700);
  font-size: 0.86rem;
  letter-spacing: 0.02em;
  margin-top: 10px;
}

.auth-form input[type="text"],
.auth-form input[type="email"],
.auth-form input[type="password"] {
  padding: 13px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--surface);
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--ink-900);
  transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.auth-form input::placeholder {
  color: var(--ink-300);
}

.auth-form input:focus {
  outline: none;
  background: #fff;
  border-color: var(--blue-400);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.16);
}

.auth-error {
  color: #dc2626;
  font-size: 0.82rem;
  margin-top: 4px;
}

.auth-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.auth-check {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--ink-700);
}

.auth-check input {
  width: 16px;
  height: 16px;
  accent-color: var(--blue-500);
}

.auth-link {
  color: var(--blue-600);
  font-weight: 600;
  font-size: 0.88rem;
  text-decoration: none;
}

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

.auth-check--disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.auth-check--disabled input {
  cursor: not-allowed;
}

.auth-link--disabled {
  color: var(--ink-300);
  cursor: not-allowed;
  pointer-events: none;
  text-decoration: none;
}

.auth-btn {
  width: 100%;
  border: none;
  padding: 14px 18px;
  margin-top: 20px;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-weight: 700;
  font-size: 0.98rem;
  letter-spacing: 0.03em;
  color: #fff;
  background: linear-gradient(135deg, var(--blue-500), var(--navy-700));
  cursor: pointer;
  box-shadow: 0 10px 24px rgba(29, 78, 216, 0.3);
  transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
}

.auth-btn:hover {
  transform: translateY(-2px);
  filter: brightness(1.08);
  box-shadow: 0 16px 32px rgba(29, 78, 216, 0.38);
}

.auth-btn:active {
  transform: translateY(0);
}

.auth-btn:focus-visible {
  outline: 3px solid var(--sky-400);
  outline-offset: 2px;
}

.auth-footer {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 0.88rem;
  color: var(--ink-500);
}

.auth-footer a {
  color: var(--blue-600);
  font-weight: 600;
  text-decoration: none;
}

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

/* Brand dentro del formulario: oculto en desktop, visible en tablet/movil */
.auth-brand--mobile {
  display: none;
}

/* Tablet y movil: ocultar panel izquierdo, solo formulario */
@media (max-width: 960px) {
  .auth-shell {
    padding: 32px 20px;
  }

  .auth-card {
    grid-template-columns: 1fr;
    width: min(520px, 100%);
  }

  .auth-card__left {
    display: none;
  }

  .auth-card__right {
    padding: 40px 36px;
    gap: 18px;
  }

  .auth-brand--mobile {
    display: inline-flex;
    color: var(--ink-900);
    margin-bottom: 4px;
  }

  .auth-brand--mobile .auth-brand__logo {
    box-shadow: none;
    border: 1px solid var(--line);
  }

  .auth-brand--mobile .auth-brand__title {
    color: var(--navy-900);
  }

  .auth-brand--mobile .auth-brand__sub {
    color: var(--blue-600);
  }
}

/* Movil pequeno: pantalla completa */
@media (max-width: 600px) {
  .auth-shell {
    padding: 0;
    align-items: flex-start;
  }

  .auth-shell::after {
    display: none;
  }

  .auth-card {
    width: 100%;
    min-height: 100vh;
    border-radius: 0;
    box-shadow: none;
  }

  .auth-card__right {
    padding: 36px 24px 40px;
    flex: 1;
    gap: 16px;
  }

  .auth-card__header h2 {
    font-size: 1.5rem;
  }

  .auth-form input[type="text"],
  .auth-form input[type="email"],
  .auth-form input[type="password"] {
    padding: 14px 16px;
    font-size: 1rem;
  }

  .auth-footer {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .auth-btn {
    transition: none;
  }

  .auth-btn:hover {
    transform: none;
  }
}