/* --- VARIABLES DE MARCA PREMIUM --- */
:root {
  --bg-main: #0a0a0a;
  --bg-card: #121212;
  --bg-input: #1a1a1a;
  --border-color: rgba(255, 255, 255, 0.06);
  --border-focus: #d4af37; /* Dorado Champagne */
  
  --text-main: #ffffff;
  --text-muted: #8e8e93;
  
  --font-sans: 'Inter', sans-serif;
  --font-serif: 'Playfair Display', serif;
  
  --transition-smooth: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

/* --- RESET & BASE --- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  overflow-x: hidden;
  display: flex;
}

/* --- LAYOUT CONTENEDOR DE PANTALLA COMPLETA --- */
.page-container {
  display: flex;
  width: 100%;
  min-height: 100vh;
}

/* --- COLUMNA IZQUIERDA: BRANDING --- */
.brand-side {
  position: relative;
  flex: 1.2;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #050505;
  padding: 3rem;
  border-right: 1px solid var(--border-color);
}

/* Sutil entramado de fondo premium */
.brand-bg-overlay {
  position: absolute;
  inset: 0;
  opacity: 0.03;
  background-image: radial-gradient(var(--text-main) 1px, transparent 0);
  background-size: 24px 24px;
}

.brand-content {
  position: relative;
  text-align: center;
  z-index: 2;
}

/* LOGO PROFESIONAL ANIMADO CON CSS */
.logo-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.app-logo {
  position: relative;
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Anillo dorado exterior con pulsación lenta */
.logo-ring {
  position: absolute;
  inset: 0;
  border: 2px solid var(--border-focus);
  border-radius: 50%;
  opacity: 0.8;
  animation: logo-pulse 4s infinite ease-in-out;
}

.logo-letter {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 500;
  color: var(--text-main);
  letter-spacing: -1px;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 500;
  letter-spacing: 4px;
  text-transform: lowercase;
  color: var(--text-main);
}

.brand-slogan {
  margin-top: 1rem;
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--text-muted);
  letter-spacing: 1px;
}

/* --- COLUMNA DERECHA: FORMULARIO --- */
.form-side {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  background-color: var(--bg-main);
}

.login-box {
  width: 100%;
  max-width: 400px;
}

.form-header {
  margin-bottom: 2.5rem;
}

.form-header h2 {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 500;
  letter-spacing: -0.5px;
  margin-bottom: 0.5rem;
}

.form-subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 300;
}

/* --- COMPONENTES DEL FORMULARIO --- */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 0.6rem;
  color: var(--text-muted);
}

.input-wrapper {
  position: relative;
}

.form-group input {
  width: 100%;
  padding: 1rem 1.2rem;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 400;
  outline: none;
  transition: var(--transition-smooth);
}

.form-group input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.08);
  background-color: calc(var(--bg-input) + #050505);
}

/* Cambia el color del placeholder nativo */
.form-group input::placeholder {
  color: #48484a;
}

/* BOTÓN DE LOGIN PREMIUM ACCIONABLE */
.btn-login {
  width: 100%;
  padding: 1.1rem;
  background-color: var(--text-main);
  border: none;
  border-radius: 8px;
  color: var(--bg-main);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: var(--transition-smooth);
  margin-top: 2rem;
}

.btn-login:hover {
  background-color: var(--border-focus);
  color: var(--bg-main);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212, 175, 55, 0.15);
}

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

.btn-arrow {
  transition: var(--transition-smooth);
}

.btn-login:hover .btn-arrow {
  transform: translateX(4px);
}

/* MENSAJE DE ERROR ESTILIZADO */
.error {
  margin-top: 1.2rem;
  color: #ff453a;
  font-size: 0.9rem;
  text-align: center;
  min-height: 20px;
  font-weight: 400;
}

/* --- ANIMACIONES DE ENTRADA (KEYFRAMES) --- */
.animate-fade-in {
  animation: fadeIn 1s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

.animate-fade-in-delayed {
  opacity: 0;
  animation: fadeIn 1s cubic-bezier(0.25, 1, 0.5, 1) 0.3s forwards;
}

.animate-slide-up {
  opacity: 0;
  animation: slideUp 1s cubic-bezier(0.25, 1, 0.5, 1) 0.1s forwards;
}

/* --- CONTENEDOR DE ERROR PREMIUM --- */
.error-container {
  margin-top: 1.5rem;
  min-height: 48px; /* Evita que el formulario "salte" cuando aparece el error */
  display: flex;
  align-items: center;
  justify-content: center;
}

.error {
  margin-top: 1.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
  min-height: 20px;
  display: block;
}

/* Cuando el JS inyecta texto, se activa visualmente de forma suave */
.error:not(:empty) {
  opacity: 1;
  transform: translateY(0);
}

.login-footer {
  text-align: center;
  margin-top: 2.5rem;
  font-size: 0.85rem;
  color: #666; /* O el color de texto secundario que uses */
  font-family: 'Inter', sans-serif;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes logo-pulse {
  0%, 100% { transform: scale(1); opacity: 0.8; box-shadow: 0 0 0 0 rgba(212, 175, 55, 0); }
  50% { transform: scale(1.04); opacity: 1; box-shadow: 0 0 15px 2px rgba(212, 175, 55, 0.2); }
}

/* --- RESPONSIVE / MEDIA QUERY CELULARES --- */
@media (max-width: 900px) {
  .page-container {
    flex-direction: column;
  }
  
  .brand-side {
    padding: 3rem 1.5rem 2rem 1.5rem;
    flex: none;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  
  .brand-name {
    font-size: 2.4rem;
  }
  
  .form-side {
    padding: 2.5rem 1.5rem;
    align-items: flex-start;
  }
}