:root {
  --back1: #ffffff;
  --back2: #ffffff;
  --primary-bg: #ff9a00;
  --primary-light: #ff5d00;
  --primary-dark: #0f2f65;
  --accent-gold: #FFD700;
  --white: #ffffff;
  --light-gray: #f8f9fa;
  --medium-gray: #e9ecef;
  --dark-gray: #6c757d;
  --success: #28a745;
  --danger: #dc3545;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 15px rgba(0, 0, 0, 0.2);
  --border-radius: 12px;
  --transition: all 0.3s ease;
}

/* Reset y estilos base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, var(--primary-bg) 0%, var(--primary-light) 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  position: relative;
  overflow: hidden;
}

/* Fondo animado */
body::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="40" r="1.5" fill="rgba(255,255,255,0.15)"/><circle cx="40" cy="80" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="90" cy="80" r="2.5" fill="rgba(255,255,255,0.05)"/><circle cx="10" cy="60" r="1.5" fill="rgba(255,255,255,0.1)"/></svg>');
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(180deg); }
}

.login-container {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-radius: 20px;
  padding: 40px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 420px;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.2);
  animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.login-header {
  text-align: center;
  margin-bottom: 30px;
}

.login-logo {
  width: 300px;
  height: 100px;
  object-fit: contain;
  margin-bottom: 20px;
  transition: transform 0.3s ease;
}

.login-logo:hover {
  transform: scale(1.05);
}

.login-header h1 {
  color: var(--primary-dark);
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--primary-bg), var(--primary-light));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.login-header p {
  color: var(--dark-gray);
  font-size: 16px;
  font-weight: 400;
}

.form-group {
  margin-bottom: 25px;
  position: relative;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--primary-dark);
  font-weight: 600;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-control {
  width: 100%;
  padding: 15px 20px;
  border: 2px solid var(--medium-gray);
  border-radius: var(--border-radius);
  font-size: 16px;
  transition: var(--transition);
  background: var(--white);
  outline: none;
}

.form-control:focus {
  border-color: var(--primary-bg);
  box-shadow: 0 0 0 3px rgba(255, 154, 0, 0.1);
  background: var(--white);
  transform: translateY(-2px);
}

.form-control:hover {
  border-color: var(--primary-light);
}

.password-container {
  position: relative;
}

.password-container .form-control {
  padding-right: 50px;
}

.toggle-password {
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  cursor: pointer;
  font-size: 18px;
  color: var(--dark-gray);
  transition: color 0.3s ease;
  user-select: none;
}

.toggle-password:hover {
  color: var(--primary-bg);
}

.btn {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, var(--primary-bg) 0%, var(--primary-light) 100%);
  color: var(--white);
  border: none;
  border-radius: var(--border-radius);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 1px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-bg) 100%);
}

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

.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  background: var(--medium-gray);
}

.error-message {
  color: var(--danger);
  font-size: 14px;
  margin-top: 10px;
  padding: 10px;
  background: rgba(220, 53, 69, 0.1);
  border-radius: 8px;
  border-left: 4px solid var(--danger);
  display: none;
}

.error-message.show {
  display: block;
  animation: shake 0.5s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
  20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.signup-link {
  text-align: center;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--medium-gray);
}

.signup-link p {
  color: var(--dark-gray);
  font-size: 14px;
}

.signup-link a {
  color: var(--primary-bg);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
}

.signup-link a:hover {
  color: var(--primary-light);
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 480px) {
  .login-container {
    padding: 30px 25px;
    margin: 10px;
  }

  .login-header h1 {
    font-size: 24px;
  }

  .login-logo {
    width: 60px;
    height: 60px;
  }
}

/* Efectos de carga */
.loading {
  pointer-events: none;
  opacity: 0.7;
}

.loading .btn {
  background: var(--medium-gray);
  cursor: not-allowed;
}

.loading .btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--white);
  border-top: 2px solid transparent;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Validación de formularios */
.form-control:invalid {
  border-color: var(--danger);
}

.form-control:valid {
  border-color: var(--success);
}

/* Selección personalizada */
::selection {
  background-color: var(--accent-gold);
  color: var(--primary-dark);
}

/* Scroll suave */
html {
  scroll-behavior: smooth;
}