/* =========================================
   ESTILOS UNIFICADOS PARA LOGINS
   ========================================= */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  transition: background 0.3s ease;
}

/* --- Variantes de Color de Fondo --- */
body.bg-admin {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

body.bg-libros {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

body.bg-panel {
  background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
}

/* --- Contenedor Principal --- */
.login-container {
  background: white;
  padding: 50px 40px;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  max-width: 450px;
  width: 100%;
  text-align: center;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

/* --- Logo / Icono --- */
.login-logo {
  width: 100px;
  height: 100px;
  margin: 0 auto 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: white;
  /* Emoji color fix if transparent */
}

/* Gradientes para el logo según tipo */
.bg-admin .login-logo {
  background: linear-gradient(135deg, #667eea, #764ba2);
}

.bg-libros .login-logo {
  background: linear-gradient(135deg, #f093fb, #f5576c);
}

.bg-panel .login-logo {
  background: linear-gradient(135deg, #11998e, #38ef7d);
}

/* --- Tipografía --- */
.login-container h1 {
  margin-bottom: 10px;
  font-size: 2rem;
}

/* Colores de título según tipo */
.bg-admin .login-container h1 {
  color: #667eea;
}

.bg-libros .login-container h1 {
  color: #f5576c;
}

.bg-panel .login-container h1 {
  color: #11998e;
}

.login-container p {
  color: #666;
  margin-bottom: 40px;
  font-size: 1rem;
}

/* --- Formularios --- */
.form-group {
  margin-bottom: 25px;
  text-align: left;
  position: relative;
  /* Para posicionar mensajes si fuera necesario */
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: #333;
  font-weight: 600;
  font-size: 0.95rem;
}

.form-group input {
  width: 100%;
  padding: 15px;
  border: 2px solid #e0e0e0;
  border-radius: 10px;
  font-size: 1rem;
  transition: all 0.3s ease;
  background: #fff;
  color: #333;
}

.form-group input:focus {
  outline: none;
}

/* Focus colors */
.bg-admin .form-group input:focus {
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.bg-libros .form-group input:focus {
  border-color: #f5576c;
  box-shadow: 0 0 0 3px rgba(245, 87, 108, 0.1);
}

.bg-panel .form-group input:focus {
  border-color: #11998e;
  box-shadow: 0 0 0 3px rgba(17, 153, 142, 0.1);
}

/* --- Estilos de Validación de Error --- */
.input-error {
  border-color: #ff4b4b !important;
  background-color: #fff8f8 !important;
  animation: shake 0.3s ease-in-out;
}

.validation-error {
  color: #ff4b4b;
  font-size: 0.85rem;
  margin-top: 5px;
  font-weight: 500;
  display: none;
  /* Oculto por defecto */
  animation: fadeIn 0.3s ease;
}

@keyframes shake {
  0% {
    transform: translateX(0);
  }

  25% {
    transform: translateX(-5px);
  }

  50% {
    transform: translateX(5px);
  }

  75% {
    transform: translateX(-5px);
  }

  100% {
    transform: translateX(0);
  }
}

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

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Forgot Password Link --- */
.forgot-password-link {
  display: block;
  text-align: right;
  margin-top: 8px;
  font-size: 0.85rem;
  color: #888;
  text-decoration: none;
  cursor: pointer;
  transition: color 0.3s;
}

.forgot-password-link:hover {
  text-decoration: underline;
}

.bg-admin .forgot-password-link:hover {
  color: #667eea;
}

.bg-libros .forgot-password-link:hover {
  color: #f5576c;
}

/* --- Checkbox Recordarme --- */
.remember-me {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: -10px;
  margin-bottom: 25px;
}

.remember-me input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin: 0;
  cursor: pointer;
  accent-color: #667eea;
  /* Color por defecto */
}

.bg-admin .remember-me input[type="checkbox"] {
  accent-color: #667eea;
}

.bg-libros .remember-me input[type="checkbox"] {
  accent-color: #f5576c;
}

.remember-me label {
  margin-bottom: 0;
  font-weight: 400;
  cursor: pointer;
  color: #666;
  user-select: none;
}

/* --- Botón Login --- */
.btn-login {
  width: 100%;
  padding: 15px;
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  margin-top: 10px;
}

/* Gradientes botón */
.bg-admin .btn-login {
  background: linear-gradient(135deg, #667eea, #764ba2);
}

.bg-libros .btn-login {
  background: linear-gradient(135deg, #f093fb, #f5576c);
}

.bg-panel .btn-login {
  background: linear-gradient(135deg, #11998e, #38ef7d);
}

.btn-login:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.25);
  filter: brightness(1.05);
}

/* Animación de Carga (Pulse) */
@keyframes btn-pulse {
  0% {
    transform: scale(0.98);
    opacity: 0.85;
  }

  50% {
    transform: scale(1);
    opacity: 1;
  }

  100% {
    transform: scale(0.98);
    opacity: 0.85;
  }
}

.btn-login:disabled {
  cursor: wait;
  animation: btn-pulse 1s infinite ease-in-out;
  box-shadow: none;
  transform: none;
  /* Prevenir conflicto con hover */
  filter: brightness(0.9);
}

/* --- Botón Volver --- */
.btn-volver {
  display: inline-block;
  margin-top: 25px;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
}

.btn-volver:hover {
  transform: translateX(-5px);
}

.bg-admin .btn-volver {
  color: #667eea;
}

.bg-admin .btn-volver:hover {
  color: #764ba2;
}

.bg-libros .btn-volver {
  color: #f5576c;
}

.bg-libros .btn-volver:hover {
  color: #f093fb;
}

.bg-panel .btn-volver {
  color: #11998e;
}

.bg-panel .btn-volver:hover {
  color: #38ef7d;
}

/* --- Utilidades --- */
.alert {
  padding: 15px;
  border-radius: 10px;
  margin-bottom: 20px;
  font-weight: 600;
  display: none;
}

.alert-error {
  background: #fee;
  color: #c33;
  border: 1px solid #fcc;
}

.alert-info {
  background: #e1f5fe;
  color: #0277bd;
  border: 1px solid #b3e5fc;
}

.info-box {
  padding: 20px;
  border-radius: 10px;
  margin-bottom: 30px;
  border-left-width: 4px;
  border-left-style: solid;
  text-align: left;
}

.bg-libros .info-box {
  background: linear-gradient(135deg, rgba(240, 147, 251, 0.1), rgba(245, 87, 108, 0.1));
  border-left-color: #f5576c;
}

.bg-panel .info-box {
  background: linear-gradient(135deg, rgba(17, 153, 142, 0.1), rgba(56, 239, 125, 0.1));
  border-left-color: #11998e;
}

.info-box p {
  margin: 0;
  color: #555;
  font-size: 0.95rem;
  line-height: 1.6;
}

/* --- Toggle Password --- */
.password-toggle {
  position: relative;
}

.password-toggle input {
  padding-right: 50px;
}

.toggle-icon {
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  cursor: pointer;
  font-size: 1.2rem;
  color: #999;
  user-select: none;
}

/* --- Botón Dark Mode Flotante --- */
.theme-btn {
  position: fixed;
  top: 20px;
  right: 20px;
  font-size: 1.5rem;
  background: rgba(0, 0, 0, 0.2);
  color: #fff;
  border: none;
  padding: 10px;
  width: 45px;
  height: 45px;
  border-radius: 50%;
  cursor: pointer;
  backdrop-filter: blur(6px);
  z-index: 9999;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-btn:hover {
  background: rgba(0, 0, 0, 0.5);
  transform: scale(1.15) rotate(15deg);
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
}

/* =========================================
   LOGIN SUCCESS OVERLAY (ANIMACIÓN BIENVENIDA)
   ========================================= */
.login-success-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    z-index: 99999;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
    backdrop-filter: blur(8px);
}

.login-success-overlay.active {
    opacity: 1;
    visibility: visible;
}

.login-success-content {
    text-align: center;
    transform: scale(0.8);
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 15px 50px rgba(0,0,0,0.1);
}

.login-success-overlay.active .login-success-content {
    transform: scale(1);
}

.success-icon {
    font-size: 5rem;
    margin-bottom: 20px;
    display: block;
    animation: iconBounce 1.5s infinite;
}

.login-success-content h2 {
    font-size: 2.2rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.login-success-content p {
    font-size: 1.1rem;
    color: #666;
}

@keyframes iconBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* Colors for Admin */
body.bg-admin .login-success-content h2 { color: #667eea; }
body.bg-admin .success-icon { text-shadow: 0 5px 15px rgba(102, 126, 234, 0.3); }

/* Colors for Libros */
body.bg-libros .login-success-content h2 { color: #f5576c; }

/* =========================================
   MODO OSCURO (Unified)
   ========================================= */
body.dark {
  background: #0c0c0c !important;
}

body.dark .login-container {
  background: #1a1a1a !important;
  color: #eee;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.7);
}

body.dark h1 {
  color: #b7a3ff !important;
}

body.dark p,
body.dark label {
  color: #ccc !important;
}

body.dark input {
  background: #222 !important;
  border-color: #444 !important;
  color: #fff !important;
}

/* Colores específicos Dark Mode por tipo */
body.dark.bg-admin h1 {
  color: #9a84ff !important;
}

body.dark.bg-admin .btn-login {
  background: linear-gradient(135deg, #9a84ff, #6b4eff) !important;
}

body.dark.bg-admin input:focus {
  border-color: #9a84ff !important;
  box-shadow: 0 0 0 3px rgba(154, 132, 255, 0.2) !important;
}

body.dark.bg-admin .btn-volver {
  color: #cbb8ff !important;
}

body.dark.bg-admin .forgot-password-link:hover {
  color: #9a84ff;
}

body.dark.bg-libros h1 {
  color: #ff8fa3 !important;
}

body.dark.bg-libros .btn-login {
  background: linear-gradient(135deg, #ff8fa3, #ff4b6e) !important;
}

body.dark.bg-libros input:focus {
  border-color: #ff4b6e !important;
  box-shadow: 0 0 0 3px rgba(255, 75, 110, 0.2) !important;
}

body.dark.bg-libros .btn-volver {
  color: #ffb3c1 !important;
}

body.dark.bg-libros .forgot-password-link:hover {
  color: #ff8fa3;
}

body.dark.bg-panel h1 {
  color: #4fffc0 !important;
}

body.dark.bg-panel .btn-login {
  background: linear-gradient(135deg, #38ef7d, #11998e) !important;
}

body.dark.bg-panel input:focus {
  border-color: #38ef7d !important;
  box-shadow: 0 0 0 3px rgba(56, 239, 125, 0.2) !important;
}

body.dark.bg-panel .btn-volver {
  color: #8affd1 !important;
}

body.dark .alert-error {
  background: #331 !important;
  border-color: #553 !important;
  color: #f99 !important;
}

body.dark .alert-info {
  background: #0d2b3a !important;
  border-color: #1a4c66 !important;
  color: #4fc3f7 !important;
}

body.dark .toggle-icon {
  color: #ccc !important;
}

body.dark .info-box {
  background: rgba(255, 255, 255, 0.05) !important;
}

body.dark .input-error {
  background: #3a1d1d !important;
  border-color: #ff6b6b !important;
}

body.dark .validation-error {
  color: #ff6b6b;
}

body.dark .forgot-password-link {
  color: #aaa;
}

/* Overlay Dark Mode */
body.dark .login-success-overlay {
    background: rgba(10, 10, 10, 0.95);
}
body.dark .login-success-content {
    background: #1a1a1a;
    box-shadow: 0 15px 50px rgba(0,0,0,0.5);
}
body.dark .login-success-content p {
    color: #bbb;
}